Foldable cart

Abstract

A folding trolley, characterized in that it has a folded state and an unfolded state, the folding trolley comprising a front frame (1), a rear frame (2), and a reinforced folding assembly (4), wherein in the unfolded state the front frame (1) and the rear frame (2) are rotated away from each other to be unfolded, and in the folded state the front frame (1) and the rear frame (2) are rotated closer to each other to be folded, the front frame (1) comprising a front lower bar (11) capable of rotating upwards and downwards, the rear frame (2) comprising a rear lower bar (21) that can be rotated to unfold or fold with respect to the front lower bar (11), the reinforced folding assembly (4) being used to connect the front lower bar (11) and the rear lower bar (21).

Description

Technical FieldThe present invention relates to the technical field of folding cars, and more particularly to a folding car.Prior ArtA carriage is an aid for transporting objects, which usually consists of one or more wheels, a frame and a handle. However, the total area of a carriage is large and not easy to transport. For this reason, people have presented folding cars, folding cars can be folded, the total area of the car will become smaller. However, since the structure of the cart will be foldable, the cart after being unfolded will result in the structural strength of the foldable cart being lower than that of a non-foldable cart, resulting in the foldable cart having greater limitations.Content of the Utility ModelThe present invention aims to provide a technical solution that can improve the structural strength of the folding cart after folding open to overcome the above-mentioned deficiencies.In order to achieve the above objects, the invention provides the following technical solutions:A foldable cart has a folded state and an unfolded state, the foldable cart comprising a front frame, a rear frame and a reinforced folding arrangement, wherein in the unfolded state the front frame and the rear frame are rotated away from each other to be unfolded and in the folded state the front frame and the rear frame are rotated closer to each other to be folded, wherein the front frame comprises a front lower rod capable of rotating up and down, wherein the rear frame comprises a rear lower rod capable of rotating to be unfolded or folded with respect to the front lower rod, wherein the reinforced folding arrangement is used to connect the front lower rod and the rear lower rod.As another option to this utility model, the reinforced folding assembly includes a first reinforcing bar hinged to the front frame and a second reinforcing bar hinged to the rear frame, one end of the first reinforcing bar being hinged to one end of the second reinforcing bar, the first reinforcing bar being hinged to a first connecting bar hinged to the front lower bar, the second reinforcing bar being hinged to a second connecting bar hinged to the rear lower bar.As another option for this utility model: the front frame is provided with a first support frame, the first support frame comprising a first direct connection portion connected to the front frame and a first hinged portion hinged to the first reinforcing bar, the first direct connection portion being bent with respect to the first hinged portion, the rear frame being provided with a second support frame, the second support frame comprising a second direct connection portion connected to the rear frame and a second hinged portion hinged to the second reinforcing bar, the second direct connection portion being bent with respect to the second hinged portion.As another option to this utility model, one end of the rear lower rod is connected to a locking element and one end of the front lower rod is disposed within the locking element and forms a hinge.As another option for this utility model, one end of the locking element is provided with an overlapping portion to overlap on the front lower rod in the unfolded state.As another option to this utility model, the front frame further includes a first main frame and a first upper rod hinged to an upper part of the first main frame, the front lower rod hinged to a lower part of the first main frame, the rear frame further includes a second main frame and a second upper rod hinged to an upper part of the second main frame, the rear lower rod hinged to a lower part of the second main frame, a link is disposed between the first upper rod and the second upper rod, and an end of the first upper rod and an end of the second upper rod are both hinged to the link.As another option for this utility model, the front frame and the rear frame are provided with hinge support frames to ensure that the front frame and the rear frame are stable in the unfolded state.As another option to this utility model, the articulated support frame comprises a first connecting rod articulated to the front lower rod, wherein an end of the first connecting rod is articulated to a first swing arm, an end of the first swing arm is articulated to a second upper rod, a second connecting rod is articulated to the rear lower rod, an end of the second connecting rod is articulated to a second swing arm, an end of the second swing arm is articulated to the first upper rod, wherein the first connecting rod is articulated to the second connecting rod at an offset point between them by means of a rivet.As another option to this utility model, the first main frame and the second main frame are provided with removable support rods, the support rods being provided with a roof.As another option of this utility model, the first main frame and the second main frame are provided with removable rollers, and the second main frame is hinged to a pusher bar.The advantages of this technical solution compared to the prior art are: the reinforced folding arrangement can reinforce the load bearing capacity of the frame with only a lower rod after the frame is unfolded and avoid the deformation of the frame due to the low strength of the frame, and the reinforced folding arrangement can also be folded together with the frame when the frame is folded so as to be convenient to store.Other aspects and advantages of the present invention will be set forth in part in the description which follows, in part will be apparent from the description which follows, or may be learned by practice of the invention.Brief Description of the DrawingsIn order to more clearly describe the technical solutions in the embodiments of the present invention or in the prior art, the appended drawings required for describing the embodiments of the prior art will be briefly discussed below. The accompanying drawings in the following description show only some embodiments of the present invention, and those skilled in the art can derive still other drawings from the accompanying drawings without any need for any drawing. FIG. 1 is a schematic diagram of the entire frame that is unfolded according to a first embodiment of the present invention; FIG. 2 is a schematic diagram of the entire frame that is unfolded according to a second embodiment of the present invention; FIG. 3 is a schematic diagram of the entire frame which collapses according to the first embodiment of the present invention; FIG. 4 is a schematic diagram of the entire frame which collapses according to the second embodiment of the present invention; and FIG. 5 is a partially enlarged schematic diagram of A in FIG. 2.The corresponding labels in the attached drawings will be described below:1, Front frame; 11, front lower rod; 12, first support frame; 121, first direct connection portion; 122, first hinged portion; 13, first main frame; 131, first upper rod; 14, support rod; 15, roof; 16, rollers; 2, rear frame; 21, rear lower rod; 211, locking member; 212, overlapping portion; 22, second support frame; 221, second direct connection portion; 222, second hinged portion; 23, second main frame; 231, second upper rod; 24, slide rod; 3, connection member; 4, reinforced folding assembly; 41, first reinforcing rod; 411, first connection rod; 42, second reinforcing rod; 421, second connection rod; 5, hinge support frame; 51, first connection rod; 52, first swing lever; 53, second connection rod; 54, second swing lever.Detailed DescriptionThe technical solutions of the embodiments of the present invention will be clearly and fully described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only a few, not all, embodiments of the present invention. All other embodiments which the person skilled in the art obtains on the basis of the embodiments of the present invention without any user effort fall within the scope of protection of the present invention.Referring to FIGS. 1-5, a folding cart has a folded state and an unfolded state, the folding cart comprising a front frame 1, a rear frame 2, and a reinforced folding assembly 4, wherein in the unfolded state, the front frame 1 and the rear frame 2 are rotated away from each other to be unfolded, and in the folded state, the front frame 1 and the rear frame 2 are rotated closer to each other to be folded, the front frame 1 comprising a front lower rod 11 capable of rotating upward and downward, the rear frame 2 comprising a rear lower rod 21 capable of rotating to be unfolded or folded with respect to the front lower rod 11, the reinforced folding assembly 4 being deployed, This is done in order to connect the front lower rod 11 and the rear lower rod 21. The reinforced folding assembly makes it possible to support and reinforce the front lower rod 11 and the rear lower rod 21 after the frame is unfolded, and to avoid deformation of the frame due to the low strength of the frame, and the reinforced folding assembly can also be folded together with the frame when the frame is folded.In some embodiments: the reinforced folding assembly 4 comprises a first reinforcing bar 41 hinged to the front frame 1 and a second reinforcing bar 42 hinged to the rear frame 2, wherein an end of the first reinforcing bar 41 is hinged to an end of the second reinforcing bar 42, wherein the first reinforcing bar 41 is hinged to a first connecting bar 411 hinged to the front lower bar 11, wherein the second reinforcing bar 42 is hinged to a second connecting bar 421 hinged to the rear lower bar 21. The front frame 1 is provided with a first support frame 12, the first support frame 12 comprising a first direct connection portion 121 connected to the front frame 1 and a first hinged portion 122 hinged to the first reinforcing bar 41, the first direct connection portion 121 being bent with respect to the first hinged portion 122, the rear frame 2 being provided with a second support frame 22, the second support frame 22 comprising a second direct connection portion 221 connected to the rear frame 2 and a second hinged portion 222 hinged to the second reinforcing bar 42, the second direct connection portion 221 being bent with respect to the second hinged portion 222. One end of the rear lower rod 21 is connected to a locking member 211, and one end of the front lower rod 11 is disposed inside the locking member 211 and constitutes a hinge. One end of the locking member 211 is provided with an overlapping portion 212 to overlap on the front lower rod 11 in the unfolded state. The front frame 1 includes a first main frame 13 and a first upper rod 131 hinged to the first main frame, the rear frame 2 includes a second main frame 23 and a second upper rod 231 hinged to the second main frame 23, a link 3 is disposed between the first upper rod 131 and the second upper rod 231, and an end of the first upper rod 131 and an end of the second upper rod 231 are both hinged to the link 3. When the front frame 1 and the rear frame 2 are in the unfolded state, the first reinforcing bar 41 and the second reinforcing bar 42 are also in the unfolded state, so that the first connecting bar 411 and the second connecting bar 421 are capable of distributing the weight received by the front lower bar 11 and the rear lower bar 21, respectively, to the first reinforcing bar 41 and the second reinforcing bar 42 to serve as reinforcement.More specifically, in order to collapse the front frame 1 and the rear frame 2, the front frame 1 and the rear frame 2 are slid toward each other, and the front frame 1 and the rear frame 2 bring the first upper rod 131 and the second upper rod 231 closer to each other as they move, respectively, so that the front lower rod 11 and the rear lower rod 21 start to be also close to each other, and the size of the front frame 1 and the rear frame 2 starts to decrease to be able to achieve the function of folding the front frame 1 and the rear frame 2.To hinge the front frame 1 and the rear frame 2, the front frame 1 and the rear frame 2 are pulled away from each other so that the first upper rod 131 and the second upper rod 231 start moving away from each other so that the first main frame 13 and the second main frame 23 start moving away from each other. The front lower rod 11 and the rear lower rod 21 start moving away from each other so that one end of the front lower rod 11 can rotate again inside the locking member 211 so that the overlapping portion 212 overlaps the front lower rod 11, which can prevent the front lower rod 11 from rotating further downward to restrict the front lower rod 11 to the deployed position, which in turn allows the rear lower rod 21 to also remain in the deployed position. In addition, the first reinforcing bar 41 and the second reinforcing bar 42 move away from each other so that the front frame 1 and the rear frame 2 are fully unfolded when the link 3 is moved to the restriction position and the link 3 contacts the front frame 1 and the rear frame 2. In addition, the first reinforcing bar 41 and the second reinforcing bar 42 are set parallel to each other, so that the first reinforcing bar 41 and the second reinforcing bar 42 can be supported by the first connecting bar 411 and the second connecting bar 421 on the front lower bar 11 and the rear lower bar 21, respectively, and thus can be reinforced for unfolding between the first main frame 13 and the second main frame 23.In some embodiments, the front frame 1 and the rear frame 2 are provided with hinge support frames 5 to ensure that the front frame 1 and the rear frame 2 are stable in the deployed state. The articulated support frame 5 comprises a first connecting rod 51 articulated to the front lower rod 11, wherein an end of the first connecting rod 51 is articulated to a first swing arm 52, an end of the first swing arm 52 is articulated to a second upper rod 231, a second connecting rod 53 is articulated to the rear lower rod 21, an end of the second connecting rod 53 is articulated to a second swing arm 54, an end of the second swing arm 54 is articulated to the first upper rod 131, wherein the first connecting rod 51 is articulated to the second connecting rod 53 at an offset point between them by means of a rivet. The first main frame 13 is provided with a first support frame 12, one end of the first support frame 12 is hinged to one end of the first reinforcing bar 41, and the second main frame 23 is provided with a second support frame 22, one end of the second support frame 22 is hinged to the second reinforcing bar 42. The hinge support frame 5 can be further reinforced when the front frame 1 and the rear frame 2 are unfolded, thereby ensuring that the front frame 1 and the rear frame 2 can be reinforced in the unfolded state.More specifically, as the front frame 1 and the rear frame 2 move away from each other, the first swing lever 52 and the second swing lever 54 begin to rotate through the joint with the first connecting rod 51 and the second connecting rod 53 as an axis, respectively, and after the front frame 1 and the rear frame 2 are fully unfolded, the first swing lever 52 and the second swing lever 54 align with the first connecting rod 51 and the second connecting rod 53 respectively to enhance the unfolding of the first main frame 13 and the second main frame 23.In some embodiments, the first main frame 13 and the second main frame 23 are provided with detachable support rods 14, the support rods 14 being provided with a roof 15. The first main frame 13 and the second main frame 23 are provided with detachable rollers 16, and the second main frame 23 is hinged to a slider 24. The roof 15 prevents the sun from directly looking into the front frame 1 and the rear frame 2, while the fit between the rollers 16 and the push rod 24 facilitates the user to push the front frame 1 and the rear frame 2.The method for collapsing and unfolding the foldable cart is as follows: In order to collapse the front frame 1 and the rear frame 2, the front frame 1 and the rear frame 2 are slid toward each other, and the front frame 1 and the rear frame 2 bring the first upper rod 131 and the second upper rod 231 closer to each other as they move, so that the front lower rod 11 and the rear lower rod 21 start to approach each other, and the first reinforcing rod 41 and the second reinforcing rod 42 start to rotate through the hinge. When the front frame 1 and the rear frame 2 have finished moving, an acute angle is formed between the first reinforcing rod 41 and the second reinforcing rod 42 and, at the same time, the first swing lever 52 and the second swing lever 54 are also caused to rotate as they move between the front frame 1 and the rear frame 2, so that an acute angle is formed between the first swing lever 52 and the second swing lever 54 and both the first connecting rod 51 and the second connecting rod 53, so that the volume between the front frame 1 and the rear frame 2 is reduced and thus the function of folding the front frame 1 and the rear frame 2 can be achieved.To hinge the front frame 1 and the rear frame 2, the front frame 1 and the rear frame 2 are pulled away from each other so that the first upper rod 131 and the second upper rod 231 start moving away from each other so that the first main frame 13 and the second main frame 23 start moving away from each other. The front lower rod 11 and the rear lower rod 21 start moving away from each other so that one end of the front lower rod 11 can rotate again inside the locking member 211 so that the overlapping portion 212 overlaps the front lower rod 11, which can prevent the front lower rod 11 from rotating further downward to restrict the front lower rod 11 to the deployed position, which in turn allows the rear lower rod 21 to also remain in the deployed position. In addition, the first reinforcing bar 41 and the second reinforcing bar 42 move away from each other so that the front frame 1 and the rear frame 2 are fully unfolded when the link 3 is moved to the restriction position and the link 3 contacts the front frame 1 and the rear frame 2. At the same time, the first reinforcing bar 41 and the second reinforcing bar 42 are unfolded in parallel to each other, so that the first reinforcing bar 41 and the second reinforcing bar 42 can support the front lower bar 11 and the rear lower bar 21, respectively, with the first connecting bar 411 and the second connecting bar 421. The first connecting rod 411 and the second connecting rod 421 are capable of distributing the weight applied to the front lower rod 11 and the rear lower rod 21 to the first reinforcing rod 41 and the second reinforcing rod 42, respectively, so that the folding-up between the first main frame 13 and the second main frame 23 can be enhanced. As the first reinforcing rod 41 and the second reinforcing rod 42 expand, the first swing lever 52 and the second swing lever 54 start to rotate about an axis through a joint with the first connecting rod 51 and the second connecting rod 53, respectively. When the front frame 1 and the rear frame 2 are fully unfolded, the first swing arm 52 and the second swing arm 54 are aligned collinearly with the first connecting rod 51 and the second connecting rod 53, respectively, to enhance the unfolding of the first main frame 13 and the second main frame 23.It will be apparent to those skilled in the art that the invention is not limited to the details of the above exemplary embodiments and may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the present invention being indicated by the appended claims rather than by the foregoing description and therefore is intended to embrace all such variations that come within the meaning and range of the equivalent essential parts of the claims, and all such accompanying references in the claims are not to be taken as limiting the claims to which they refer.

Claims

A folding cart characterized in that it has a folded state and a deployed state, the folding cart comprising a front frame (1), a rear frame (2) and a reinforced folding arrangement (4), wherein in the deployed state the front frame (1) and the rear frame (2) are rotated away from each other to be deployed and in the folded state the front frame (1) and the rear frame (2) are rotated closer to each other to be folded, wherein the front frame (1) comprises a front lower rod (11) capable of rotating up and down, wherein the rear frame (2) comprises a rear lower rod (21) capable of rotating to be deployed or folded with respect to the front lower rod (11), wherein the reinforced folding assembly (4) is used to connect the front lower bar (11) and the rear lower bar (21).The folding cart according to claim 1, characterized in that the reinforced folding arrangement (4) comprises a first reinforcing bar (41) hinged to the front frame (1) and a second reinforcing bar (42) hinged to the rear frame (2), an end of the first reinforcing bar (41) being hinged to an end of the second reinforcing bar (42), the first reinforcing bar (41) being hinged to a first connecting bar (411) hinged to the front lower bar (11), the second reinforcing bar (42) being hinged to a second connecting bar (421) hinged to the rear lower bar (21).The folding cart according to claim 2, characterized in that the front frame (1) is provided with a first support frame (12), the first support frame (12) comprising a first direct connection portion (121) connected to the front frame (1) and a first hinged portion (122) hinged to the first reinforcing bar (41), the first direct connection portion (121) being bent with respect to the first hinged portion (122), the rear frame (2) being provided with a second support frame (22), the second support frame (22) comprising a second direct connection portion (221) connected to the rear frame (2) and a second hinged portion (222) hinged to the second reinforcing bar (42), the second direct connection portion (221) being bent with respect to the second hinged portion (222).The folding cart according to claim 3, characterized in that an end of the rear lower rod (21) is connected to a locking member (211), and an end of the front lower rod (11) is disposed inside the locking member (211) and forms a hinge.The folding cart according to claim 4, characterized in that one end of the locking member (211) is provided with an overlapping portion (212) to overlap on the front lower rod (11) in the unfolded state.The folding cart according to claim 1, characterized in that the front frame (1) further comprises a first main frame (13) and a first upper bar (131) hinged to an upper part of the first main frame (13), the front lower bar (11) being hinged to a lower part of the first main frame (13), the rear frame (2) further comprises a second main frame (23) and a second upper bar (231) hinged to an upper part of the second main frame (23), the rear lower bar (21) being hinged to a lower part of the second main frame (23), a connecting member (3) being arranged between the first upper bar (131) and the second upper bar (231), and an end of the first upper rod (131) and an end of the second upper rod (231) are both hinged to the connecting member (3).Foldable cart according to claim 6, characterized in that the front frame (1) and the rear frame (2) are provided with hinge support frames (5) to ensure that the front frame (1) and the rear frame (2) are stable in the unfolded state.The foldable cart according to claim 7, characterized in that the articulated support frame (5) comprises a first connecting rod (51) articulated to the front lower rod (11), wherein an end of the first connecting rod (51) is articulated to a first swing arm (52), an end of the first swing arm (52) is articulated to a second upper rod (231), a second connecting rod (53) is articulated to the rear lower rod (21), an end of the second connecting rod (53) is articulated to a second swing arm (54), an end of the second swing arm (54) is articulated to the first upper rod (131), wherein the first connecting rod (51) is articulated to the second connecting rod (53) at an offset point between them.The folding cart according to claim 6, characterized in that the first main frame (13) and the second main frame (23) are provided with removable support rods (14), the support rods (14) being provided with a roof (15).The folding cart according to claim 6, characterized in that the first main frame (13) and the second main frame (23) are provided with removable rollers (16), and the second main frame (23) is hinged to a pusher bar (24).

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