Carrier

Abstract

The utility model discloses a carrier, which relates to the technical field of children products, has an unfolded state and a folded state, and comprises a first bracket, a second bracket, a rear wheel bracket, a front wheel bracket, a first linkage mechanism and a second linkage mechanism, the upper part of the second bracket is rotationally connected to the lower part of the first bracket; two of the second support, the front wheel support and the rear wheel support are rotationally connected, the third support is rotationally connected with any one of the two, or the first support, the front wheel support and the rear wheel support are coaxially and rotationally connected; when the upper portion of the first support rotates to be folded towards the second support, the first linkage mechanism is driven by the first support to drive the lower portion of the rear wheel support to rotate to be folded towards the second support. When the upper portion of the first support rotates to be folded towards the second support, the second linkage mechanism is driven by the first support to drive the lower portion of the front wheel support to rotate to be folded towards the rear wheel support. According to the scheme, the structure of the carrier can be simplified, the complexity of carrier folding operation steps is reduced, and rapid folding and unfolding of the carrier are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's articles technical field, especially a carrier. BACKGROUND

[0002] The carrier such as stroller, children's seat etc. in prior art, usually include main frame, front wheel assembly set in the bottom front part of main frame, rear wheel assembly set in the bottom rear part of main frame etc.;The carrier of prior art is usually designed as foldable structure, to facilitate carrying and storage. The folding structure of the carrier on the market is complex and various, how to simplify the structure of the carrier as far as possible, reduce the complexity of the folding operation steps of the carrier, realize the quick folding and unfolding of the carrier on the basis of guaranteeing the basic carrying function and safety of the carrier, this has been the goal that the technical personnel in the field continuously pursue. SUMMARY

[0003] The main purpose of the utility model is to provide a carrier, which aims to simplify the structure of the carrier, reduce the complexity of the folding operation steps of the carrier, and realize the quick folding and unfolding of the carrier.

[0004] To achieve the above object, the utility model provides a carrier, which has an unfolded state and a folded state, and comprises:

[0005] A first support extends in the up-down direction in the unfolded state;

[0006] A second support extends in the up-down direction in the unfolded state, and the upper part of the second support is rotationally connected to the lower part of the first support;

[0007] A rear wheel support extends in the up-down direction in the unfolded state;

[0008] A front wheel support extends in the up-down direction in the unfolded state;Two of the second support, the front wheel support and the rear wheel support are rotationally connected, the third one is rotationally connected to any one of the aforementioned two, or the aforementioned three are coaxially rotationally connected;

[0009] A first linkage mechanism is connected between the first support and the rear wheel support;When the upper part of the first support in the unfolded state is rotated to the second support, the first linkage mechanism drives the rear wheel support to rotate to the second support under the drive of the first support;

[0010] A second linkage mechanism is connected between the first support and the front wheel support;When the upper part of the first support in the unfolded state is rotated to the second support, the second linkage mechanism drives the front wheel support to rotate to the rear wheel support under the drive of the first support.

[0011] In an embodiment, the vehicle further comprises a seat mechanism and a third linkage mechanism, the seat mechanism extending in a front-rear direction in the unfolded state, the seat mechanism comprising a seat portion, the seat portion being rotatably connected to the rear wheel support;

[0012] The third linkage mechanism is connected between the seat portion and the first linkage mechanism or the third linkage mechanism is connected between the seat portion and the second linkage mechanism; when the vehicle is converted to the folded state, the first linkage mechanism or the second linkage mechanism drives the seat portion to move and approach the rear wheel support through the third linkage mechanism;

[0013] The third linkage mechanism comprises a first link.

[0014] In an embodiment, the first linkage mechanism comprises a first swing lever, the first swing lever extending in an up-down direction in the unfolded state, an upper portion of the first swing lever being rotatably connected to a lower portion of the first support, a lower portion of the first swing lever being rotatably connected to an upper portion of the rear wheel support; the first swing lever pulls the rear wheel support to rotate and approach the second support under the drive of the first support.

[0015] In an embodiment, an upper portion of the second support is rotatably connected to a lower portion of the first support about a first axis, an upper portion of the rear wheel support is rotatably connected to a lower portion of the second support about a second axis, a lower portion of the first swing lever is rotatably connected to an upper portion of the rear wheel support about a third axis, an upper portion of the first swing lever is rotatably connected to a lower portion of the first support about a fourth axis; the first axis, the second axis, the third axis and the fourth axis are parallel to each other, the first axis is above the fourth axis, and the second axis is above the third axis.

[0016] In an embodiment, the vehicle further comprises a seat mechanism and a third linkage mechanism, the seat mechanism extending in a front-rear direction in the unfolded state, the seat mechanism comprising a seat portion, the seat portion being rotatably connected to the rear wheel support about a fifth axis;

[0017] The third linkage mechanism comprises a first link, a front portion of the first link being rotatably connected to a front portion of the seat portion about a sixth axis, a rear portion of the first link being rotatably connected to the first swing lever;

[0018] The sixth axis is in front of the fifth axis, and the seventh axis is above the third axis;

[0019] When the first swing lever pulls the lower portion of the rear wheel support to rotate and approach the second support, the first link pulls the front portion of the seat portion to rotate and approach the rear wheel support under the drive of the first swing lever.

[0020] In an embodiment, the second linkage mechanism comprises a second swing lever, a second link, the second link extending in a front-rear direction in the unfolded state, a front part of the second link being rotatably connected to a lower part of the front wheel support, an upper part of the second swing lever being rotatably connected to a lower part of the first support, a lower part of the second swing lever being connected to a rear part of the second link; the second swing lever pulls the second link to move under the drive of the first support, so as to make the front wheel support and the rear wheel support close to each other.

[0021] In an embodiment, the second linkage mechanism comprises a second swing lever, a third link, the second swing lever extending in an up-down direction in the unfolded state, the third link extending in a front-rear direction in the unfolded state, a rear part of the third link being rotatably connected to a lower part of the rear wheel support, an upper part of the second swing lever being rotatably connected to a lower part of the first support, a lower part of the second swing lever being connected to a front part of the third link; the second swing lever pulls the third link to move under the drive of the first support, so as to make the front wheel support and the rear wheel support close to each other.

[0022] In an embodiment, the second linkage mechanism further comprises a fourth link, the fourth link extending in an up-down direction in the unfolded state, an upper part of the fourth link being rotatably connected to a lower part of the second swing lever, a lower part of the fourth link being rotatably connected to the rear part of the second link and / or the front part of the third link.

[0023] The second swing lever pulls the rear part of the second link and the front part of the third link to move close to the lower part of the second support through the fourth link under the drive of the first support.

[0024] The rear part of the second link, the front part of the third link, and the lower part of the fourth link are rotatably connected to each other around an eighth axis.

[0025] In an embodiment, the carrier further comprises a seat mechanism and a fourth linkage mechanism, the seat mechanism extending in a front-rear direction in the unfolded state, the seat mechanism comprising a seat part, the seat part being rotatably connected to the rear wheel support around a fifth axis.

[0026] The fourth linkage mechanism comprises a fifth connecting rod, which extends in the up-down direction in the unfolded state, the upper part of the fifth connecting rod is rotationally connected to the seat part about a ninth axis, the ninth axis is located behind the fifth axis, and the lower part of the fifth connecting rod is rotationally connected to the rear part of the second connecting rod and / or the front part of the third connecting rod; when the rear part of the second connecting rod and / or the front part of the third connecting rod is driven by the second swing rod to move upwards, the fifth connecting rod drives the rear part of the seat part to move under the drive of the second connecting rod and / or the third connecting rod, so as to drive the front part of the seat mechanism to rotate and fold towards the rear wheel support.

[0027] In an embodiment, the rear part of the second connecting rod, the front part of the third connecting rod and the lower part of the fifth connecting rod are coaxially rotationally connected about a tenth axis; or,

[0028] When the fifth connecting rod is connected to the second connecting rod, the connecting point of the fifth connecting rod and the second connecting rod is located in front of the connecting point of the second swing rod and the second connecting rod or the third connecting rod; or,

[0029] When the fifth connecting rod is connected to the third connecting rod, the connecting point of the fifth connecting rod and the third connecting rod is located behind the connecting point of the second swing rod and the second connecting rod or the third connecting rod.

[0030] In an embodiment, the middle part of the seat mechanism, the upper part of the rear wheel support and the upper part of the front wheel support are coaxially rotationally connected to the lower part of the second support;

[0031] The seat mechanism further comprises a backrest part, which is rotationally arranged relative to the seat part; when the vehicle is converted to the folded state, the seat part and the backrest part are respectively rotated in the same or different directions;

[0032] When the vehicle is converted to the folded state, the third linkage mechanism drives the seat part to rotate counterclockwise and approach the rear wheel support, so that the connecting part of the seat part and the backrest part moves upwards.

[0033] The vehicle provided in the utility model scheme can realize the overall rapid folding of the vehicle through the transmission of the first linkage mechanism and the second linkage mechanism, and the rear wheel support and the front wheel support can be simultaneously driven to rotate and fold relative to the second support during the rotation and folding of the first support relative to the second support. This means that the rotation and folding of the remaining parts of the vehicle can be completed under the assistance of gravity only by driving the first support to rotate and fold relative to the second support. This design not only realizes the overall rapid folding of the vehicle, but also makes the folded vehicle structure neat, facilitating storage and transportation. In addition, the vehicle can maintain an upright state after being folded, thereby further improving the convenience of the vehicle in the storage and transportation process. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 A three-dimensional structural diagram of the vehicle provided by this utility model in its unfolded state in the first embodiment;

[0036] Figure 2 A three-dimensional structural diagram of the vehicle provided by this utility model in the folding process in the first embodiment;

[0037] Figure 3 A three-dimensional structural diagram of the vehicle provided by this utility model when folded in the first embodiment;

[0038] Figure 4 A front view of the vehicle in the unfolded state in the first embodiment of the present invention;

[0039] Figure 5 An exploded view of the first embodiment of the vehicle provided by this utility model;

[0040] Figure 6 A schematic diagram of the folding process of the first embodiment of the vehicle provided by this utility model;

[0041] Figure 7 A three-dimensional structural diagram of the vehicle in the unfolded state in the second embodiment of the present invention;

[0042] Figure 8 A front view of the vehicle in the unfolded state in the second embodiment of the present invention;

[0043] Figure 9 A front view of the structure of the vehicle in the deployed state in the third embodiment of the present invention;

[0044] Figure 10 A front view of the fourth embodiment of the vehicle provided by this utility model when it is in the unfolded state;

[0045] Figure 11 A front view of the fifth embodiment of the vehicle provided by this utility model when it is in the unfolded state;

[0046] Figure 12The utility model provides a carrier sixth embodiment in the erect structure schematic diagram of the unfolded state.

[0047] Explanation of reference numerals:

[0048] X1, first axis; X2, second axis; X3, third axis; X4, fourth axis; X5, fifth axis; X6, sixth axis; X7, seventh axis; X8, eighth axis; X9, ninth axis; X10, tenth axis;

[0049] 1, first support; 2, second support; 3, rear wheel support; 4, front wheel support;

[0050] 5, first linkage mechanism; 51, first swing rod;

[0051] 6, second linkage mechanism; 61, second swing rod; 62, second connecting rod; 63, third connecting rod; 64, fourth connecting rod;

[0052] 7, seat mechanism; 71, seat part;

[0053] 8, third linkage mechanism; 81, first connecting rod;

[0054] 9, fourth linkage mechanism; 91, fifth connecting rod.

[0055] The utility model discloses the realization, functional characteristics and advantages will be combined with example, reference to the further description of the drawings. DETAILED DESCRIPTION

[0056] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0057] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0058] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not in the protection scope required by the utility model.

[0059] The utility model provides a carrier, aim at simplifying the structure of carrier, reduce the complexity of carrier folding operation step, realize the quick folding and unfolding of carrier.

[0060] Please refer to Figures 1 to 6 The carrier provided by an embodiment of the utility model has an unfolded state and a folded state, and the carrier comprises:

[0061] The first support 1 extends in the up-down direction in the unfolded state.

[0062] The second support 2 extends in the up-down direction in the unfolded state, and the upper part of the second support 2 is rotationally connected to the lower part of the first support 1.

[0063] The rear wheel support 3 extends in the up-down direction in the unfolded state.

[0064] The front wheel support 4 extends in the up-down direction in the unfolded state, two of the second support 2, the front wheel support 4 and the rear wheel support 3 are rotationally connected, the third is rotationally connected with any one of the aforementioned two, or the three are coaxially rotationally connected.

[0065] The first linkage mechanism 5 is connected between the first support 1 and the rear wheel support 3, when the upper part of the first support 1 in the unfolded state is folded to the second support 2, the first linkage mechanism 5 drives the rear wheel support 3 to fold to the second support 2 under the drive of the first support 1.

[0066] The second linkage mechanism 6 is connected between the first support 1 and the front wheel support 4, when the upper part of the first support 1 in the unfolded state is folded to the second support 2, the second linkage mechanism 6 drives the front wheel support 4 to fold to the rear wheel support 3 under the drive of the first support 1.

[0067] It should be noted that the descriptions of the upper part, the lower part, the front part and the rear part of the structural member in the present embodiment and the following embodiments are all relative positions of the corresponding structural member in the unfolded state. If it is mentioned in the present embodiment and the following embodiments that a certain structural member extends in the up-down direction, it can mean that the structural member extends vertically in the up-down direction, or it can mean that the structural member extends obliquely in the up-down direction and the left-right direction, as long as the extension path of the structural member in the unfolded state has a sub-path in the up-down direction. Similarly, if it is mentioned in the present embodiment and the following embodiments that a certain structural member extends in the left-right direction, it can mean that the structural member extends horizontally in the left-right direction, or it can mean that the structural member extends obliquely in the left-right direction and the up-down direction, as long as the extension path of the structural member in the unfolded state has a sub-path in the left-right direction. The above description will not be mentioned again in the following description.

[0068] In the present embodiment, the first support 1 and the second support 2 jointly constitute a main frame of the carrier, which is usually used to connect a backrest assembly of the carrier and provide support for the backrest assembly. The upper part of the first support 1 can be provided as a push handle structure for the user to hold and push the carrier to move. When the carrier is in the unfolded state, the lower part of the first support 1 and the upper part of the second support 2 can be rotationally locked by a locking mechanism such as a lock buckle, a pin shaft, etc., to avoid relative rotation between the first support 1 and the second support 2 during normal use of the carrier.

[0069] As shown in FIG. 1, the rear wheel support 3 can extend obliquely downward and rearward, and the front wheel support 4 can extend obliquely downward and forward, to form a triangular bottom support under the first support 1 and the second support 2, thereby providing bottom support for the first support 1 and the second support 2. Figure 4

[0070] Two of the second support 2, the front wheel support 4 and the rear wheel support 3 are rotationally connected, and the third is rotationally connected with any one of the aforementioned two, which can include the following cases: the second support 2 is rotationally connected with the front wheel support 4, and the rear wheel support 3 is rotationally connected with the second support 2 or the front wheel support 4; the second support 2 is rotationally connected with the rear wheel support 3, and the front wheel support 4 is rotationally connected with the second support 2 or the rear wheel support 3; the rear wheel support 3 is rotationally connected with the front wheel support 4, and the second support 2 is rotationally connected with the rear wheel support 3 or the front wheel support 4; wherein the second support 2, the front wheel support 4 and the rear wheel support 3 can be coaxially rotationally connected, which is not limited here.

[0071] ​The first linkage mechanism 5 can include a linkage mechanism, a crank-rocker mechanism, a crank-slider mechanism, a cam mechanism, and the like, which can convert one form of motion into another form of motion, and combinations thereof. The first linkage mechanism 5 can be directly connected to the first support 1 and the rear wheel support 3, or can be indirectly connected to the first support 1 and the rear wheel support 3 by means of other connecting members and transmission members, without being limited thereto. As shown in Figure 2 and Figure 3 When the user pushes the upper portion of the first support 1 in the unfolded state to rotate in the counterclockwise direction and to be folded toward the second support 2, the first linkage mechanism 5 can convert the rotation of the first support 1 with respect to the second support 2 into the rotation of the rear wheel support 3 with respect to the second support 2, thereby causing the rear wheel support 3 to rotate in the counterclockwise direction and the lower portion of the rear wheel support 3 to be folded toward the second support 2.

[0072] The second linkage mechanism 6 can include a linkage mechanism, a crank-rocker mechanism, a crank-slider mechanism, a cam mechanism, and the like, which can convert one form of motion into another form of motion, and combinations thereof. The second linkage mechanism 6 can be directly connected to the first support 1 and the front wheel support 4, or can be indirectly connected to the first support 1 and the front wheel support 4 by means of other connecting members and transmission members, without being limited thereto. As shown in Figure 2 and Figure 3 When the user pushes the upper portion of the first support 1 in the unfolded state to rotate in the counterclockwise direction and to be folded toward the second support 2, the second linkage mechanism 6 can convert the rotation of the first support 1 with respect to the second support 2 into the rotation of the front wheel support 4 with respect to the rear wheel support 3, thereby causing the front wheel support 4 to rotate in the counterclockwise direction and the lower portion of the front wheel support 4 to be folded toward the rear wheel support 3.

[0073] Based on the above-described arrangement, in actual use, when the vehicle in the unfolded state needs to be folded for storage, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the user can release the rotation locking state between the lower part of the first support 1 and the upper part of the second support 2, so that the first support 1 and the second support 2 can rotate relative to each other, and then push the upper part of the first support 1 to rotate in the counterclockwise direction and fold towards the second support 2; during the rotation of the first support 1, the first linkage mechanism 5 can drive the rear wheel support 3 to rotate in the counterclockwise direction under the drive of the first support 1, so that the lower part of the rear wheel support 3 folds towards the second support 2 (it can also be understood that the second support 2 is driven to rotate and fold towards the lower part of the rear wheel support 3 under the action of gravity); the second linkage mechanism 6 drives the front wheel support 4 to rotate in the counterclockwise direction relative to the rear wheel support 3 under the drive of the first support 1, so that the lower part of the front wheel support 4 folds towards the rear wheel support 3; since the rear wheel support 3 continues to rotate and fold towards the second support 2 under the drive of the first linkage mechanism 5, the front wheel support 4 that rotates and folds towards the rear wheel support 3 is equivalent to continuously rotating and folding towards the second support 2 under the drive of the second linkage mechanism 6; when the first support 1 rotates relative to the second support 2 to the position and the folding operation between the first support 1 and the second support 2 is completed, the rear wheel support 3 is also folded relative to the second support 2 to the position under the drive of the first linkage mechanism 5, and the front wheel support 4 is also folded relative to the rear wheel support 3 to the position under the drive of the second linkage mechanism 6; at this time, the carrier is in the folded state as shown in FIG. 6, and it can be seen that the lower part of the rear wheel support 3 and the lower part of the front wheel support 4 are still on the same side, that is, the rear wheel support 3 and the front wheel support 4 can still support the bottom of the carrier after folding, so that the carrier remains upright in the folded state. Figure 3 As shown in FIG. 6, the carrier is in the folded state, and it can be seen that the lower part of the rear wheel support 3 and the lower part of the front wheel support 4 are still on the same side, that is, the rear wheel support 3 and the front wheel support 4 can still support the bottom of the carrier after folding, so that the carrier remains upright in the folded state.

[0074] When it is necessary to reset the carrier in the folded state to the unfolded state, it is only necessary to rotate the first support 1 relative to the second support 2 in the opposite direction to drive the rear wheel support 3 and the front wheel support 4 to rotate in the opposite direction through the first linkage mechanism 5 and the second linkage mechanism 6 respectively; when the first support 1 is unfolded relative to the second support 2 to the position, the rear wheel support 3 and the front wheel support 4 are also unfolded relative to the second support 2 to the position, so that the carrier is reset to the unfolded state as shown in FIG. 5, and then the lower part of the first support 1 and the upper part of the second support 2 are rotationally locked through the locking mechanism to avoid rotation of the first support 1 relative to the second support 2. Figure 1 As shown in FIG. 6, the carrier is in the folded state, and it can be seen that the lower part of the rear wheel support 3 and the lower part of the front wheel support 4 are still on the same side, that is, the rear wheel support 3 and the front wheel support 4 can still support the bottom of the carrier after folding, so that the carrier remains upright in the folded state.

[0075] Therefore, the carrier provided by the embodiment can drive the rear wheel support 3 and the front wheel support 4 to rotate and fold relative to the second support 2 simultaneously in the process of rotating and folding the first support 1 relative to the second support 2, which means that the rotation and folding of the rest of the carrier can be completed with the aid of gravity by only driving the first support 1 to rotate and fold relative to the second support 2. This design not only realizes the overall rapid folding of the carrier, but also makes the folded carrier have a neat structure, which is convenient for storage and transportation. In addition, the carrier can maintain an upright state after being folded, thereby further improving the convenience of the carrier in storage and transportation.

[0076] In an embodiment, referring to Figures 1 to 8 , the carrier further comprises a seat mechanism 7 and a third linkage mechanism 8. The seat mechanism 7 extends in the front-rear direction in the unfolded state, and the seat mechanism 7 comprises a seat part 71, which is rotationally connected to the rear wheel support 3.

[0077] The third linkage mechanism 8 is connected between the seat part 71 and the first linkage mechanism 5, or the third linkage mechanism 8 is connected between the seat part 71 and the second linkage mechanism 6. When the carrier is converted into the folded state, the first linkage mechanism 5 or the second linkage mechanism 6 drives the seat part 71 to move and approach the rear wheel support 3 through the third linkage mechanism 8.

[0078] The third linkage mechanism 8 comprises a first connecting rod 81.

[0079] Specifically, the seat mechanism 7 is usually used to connect the seat assembly of the carrier and provide support for the seat assembly, so that the occupant can safely sit on the seat assembly. The seat part 71 is the part of the seat mechanism 7 directly connected to the seat assembly.

[0080] When the third linkage mechanism 8 is connected between the seat part 71 and the first linkage mechanism 5, in the process of driving the rear wheel support 3 to rotate and fold relative to the second support 2 by the first linkage mechanism 5, the first linkage mechanism 5 can directly drive or drive the first connecting rod 81 to move through the corresponding linkage mechanism, so as to synchronously drive the seat part 71 to rotate relative to the rear wheel support 3 by the first connecting rod 81, so that the seat part 71 and the rear wheel support 3 approach each other, so that the seat part 71 is folded on the rear wheel support 3 when the rear wheel support 3 is folded on the second support 2, and the overall folding of the carrier is completed.

[0081] Likewise, when the third linkage mechanism 8 is connected between the seat part 71 and the second linkage mechanism 6, in the process of the second linkage mechanism 6 driving the front wheel support 4 to rotate and fold the rear wheel support 3, the second linkage mechanism 6 can directly drive or drive the first connecting rod 81 through the corresponding connecting rod mechanism to move, so as to synchronously drive the seat part 71 to rotate relative to the rear wheel support 3 by using the first connecting rod 81, so that the seat part 71 and the rear wheel support 3 are close to each other, and the seat part 71 is synchronously folded on the rear wheel support 3 when the rear wheel support 3 is folded on the second support 2, and the overall folding of the carrier is completed.

[0082] In an embodiment, referring to Figures 1 to 6 , the first linkage mechanism 5 comprises a first swing rod 51, which extends in the up-down direction in the unfolded state, the upper part of the first swing rod 51 is rotationally connected to the lower part of the first support 1, and the lower part of the first swing rod 51 is rotationally connected to the upper part of the rear wheel support 3; the first swing rod 51 pulls the rear wheel support 3 to rotate and fold the second support 2 under the drive of the first support 1.

[0083] By providing the first swing rod 51, a simple connecting rod structure can be formed between the first support 1 and the rear wheel support 3; as Figure 4 shown, the first swing rod 51 can extend forwardly from top to bottom and be inclined, when the first support 1 is rotated and folded relative to the second support 2, the upper part of the first swing rod 51 moves with the first support 1, so that the first swing rod 51 swings, thereby the lower part of the first swing rod 51 drives the rear wheel support 3 to rotate relative to the second support 2, and then the folding action of the lower part of the rear wheel support 3 to the second support 2 is completed.

[0084] In an embodiment, referring to Figures 1 to 6 , the upper part of the second support 2 is rotationally connected to the lower part of the first support 1 about the first axis X1, the upper part of the rear wheel support 3 is rotationally connected to the lower part of the second support 2 about the second axis X2, the lower part of the first swing rod 51 is rotationally connected to the upper part of the rear wheel support 3 about the third axis X3, and the upper part of the first swing rod 51 is rotationally connected to the lower part of the first support 1 about the fourth axis X4; the first axis X1, the second axis X2, the third axis X3 and the fourth axis X4 are parallel to each other in pairs, the first axis X1 is above the fourth axis X4, and the second axis X2 is above the third axis X3.

[0085] In this embodiment, the first axis X1, the second axis X2, the third axis X3 and the fourth axis X4 arranged in sequence are connected to obtain a quadrilateral, which constitutes a planar four-bar mechanism, when any rotational pair in the planar four-bar mechanism rotates, it can drive other connecting rods in the planar four-bar mechanism to change positions such as translation, swing and rotation, thereby playing a role of transmission and conversion of motion forms. Specifically as Figure 1 , Figure 2 ,Figure 3 and Figure 6 As shown in FIG. 1, the first support 1 constitutes a rotating pair of the planar four-bar linkage, when the first support 1 rotates counterclockwise relative to the second support 2, the lower part of the first support 1 drives the first swing lever 51 to swing, the lower part of the first swing lever 51 further drives the rear wheel support 3 to rotate counterclockwise relative to the second support 2, so that the lower part of the rear wheel support 3 rotates synchronously along the counterclockwise direction towards the second support 2 with the counterclockwise rotation of the first support 1 relative to the second support 2, thereby achieving the overall folding of the carrier in a convenient and non-stuck manner.

[0086] In an embodiment, referring to Figures 1 to 8 , the carrier further comprises a seat mechanism 7 and a third linkage mechanism 8, the seat mechanism 7 extends along the front-rear direction in the unfolded state, and the seat mechanism 7 comprises a seat part 71, which is rotationally connected to the rear wheel support 3 about a fifth axis X5;

[0087] The third linkage mechanism 8 comprises a first connecting rod 81, the front part of the first connecting rod 81 is rotationally connected to the front part of the seat part 71 about a sixth axis X6, and the rear part of the first connecting rod 81 is rotationally connected to the first swing lever 51 about a seventh axis X7;

[0088] The sixth axis X6 is located in front of the fifth axis X5, and the seventh axis X7 is located above the third axis X3;

[0089] When the first swing lever 51 pulls the lower part of the rear wheel support 3 to rotate towards the second support 2, the first connecting rod 81 pulls the front part of the seat part 71 to rotate towards the rear wheel support 3 under the drive of the first swing lever 51.

[0090] Specifically, the seat mechanism 7 is usually used to connect the seat assembly of the carrier and provide support for the seat assembly, so that the occupant can safely sit on the seat assembly; the seat part 71 is the part of the seat mechanism 7 directly connected to the seat assembly.

[0091] As Figure 8As shown, the first link 81 can extend forwardly from bottom to top, the front part of the first link 81 is rotationally connected with the front part of the seat part 71 around the sixth axis X6, and the rear part of the first link 81 is rotationally connected with the lower part of the first swing lever 51 around the seventh axis X7; when the first support 1 is rotated counterclockwise relative to the second support 2 to be folded, the lower part of the first support 1 drives the first swing lever 51 to swing, and the lower part of the first swing lever 51 further drives the rear wheel support 3 to rotate counterclockwise relative to the second support 2, so that the lower part of the rear wheel support 3 is synchronously rotated counterclockwise relative to the second support 2 along with the counterclockwise rotation of the first support 1, and at the same time, the lower part of the first swing lever 51 also drives the first link 81 to move downward, so that the front part of the first link 81 pulls the front part of the seat part 71 downward, and the front part of the seat part 71 is rotated counterclockwise relative to the rear wheel support 3; when the rear wheel support 3 is folded on the second support 2 under the drive of the first swing lever 51, the front wheel support 4 is also folded on the rear wheel support 3 under the drive of the second linkage mechanism 6, and the seat part 71 is also folded on the second support 2 under the drive of the first swing lever 51 and the first link 81, so that the carrier is in a folded state, and the rear wheel support 3, the front wheel support 4 and the seat part 71 do not interfere with each other.

[0092] When it is needed to reset the carrier in the folded state to the unfolded state, it is only needed to rotate the first support 1 relative to the second support 2 in the opposite direction to drive the rear wheel support 3 and the seat part 71 to rotate in the opposite direction through the first swing lever 51, and to drive the front wheel support 4 to rotate in the opposite direction through the second linkage mechanism 6; when the first support 1 is unfolded relative to the second support 2 to be in place, the rear wheel support 3, the front wheel support 4 and the seat part 71 are also unfolded relative to the second support 2 to be in place, so that the carrier is reset to the unfolded state as shown. Figure 7 and Figure 8

[0093] Based on the above arrangement, it is only needed to drive the first support 1 to rotate relative to the second support 2 to be folded, and the rotation of the rear wheel support 3, the front wheel support 4 and the rest of the seat mechanism 7 on the carrier can be completed under the assistance of gravity, so that the convenience of folding and storing the carrier is further improved.

[0094] In an embodiment, referring to Figures 1 to 6 , the second linkage mechanism 6 includes a second swing lever 61 and a second link 62, the second link 62 extends in the front-rear direction in the unfolded state, the front part of the second link 62 is rotationally connected with the lower part of the front wheel support 4, the upper part of the second swing lever 61 is rotationally connected with the lower part of the first support 1, and the lower part of the second swing lever 61 is connected with the rear part of the second link 62; the second swing lever 61 pulls the second link 62 to move under the drive of the first support 1, so that the front wheel support 4 is close to the rear wheel support 3;

[0095] ​And / or, the second linkage mechanism 6 comprises a second swing rod 61 extending in the up-down direction in the unfolded state, a third connecting rod 63 extending in the front-back direction in the unfolded state, the rear part of the third connecting rod 63 is rotationally connected to the lower part of the rear wheel support 3, the upper part of the second swing rod 61 is rotationally connected to the lower part of the first support 1, and the lower part of the second swing rod 61 is connected to the front part of the third connecting rod 63; the second swing rod 61 pulls the third connecting rod 63 to move under the drive of the first support 1, so as to make the front wheel support 4 and the rear wheel support 3 close to each other.

[0096] In the first embodiment of the present embodiment, based on the connecting rod mechanism composed of the second swing rod 61 and the second connecting rod 62, when the second swing rod 61 moves upward, the second swing rod 61 can drive the rear part of the second connecting rod 62 to move upward, so that the front part of the second connecting rod 62 rotates relative to the rear part of the second connecting rod 62 in the direction of approaching the rear wheel support 3, thus driving the lower part of the front wheel support 4 connected to the front part of the second connecting rod 62 and the lower part of the rear wheel support 3 to close to each other, and further realizing the relative rotation and closing of the front wheel support 4 and the rear wheel support 3. In the second embodiment of the present embodiment, based on the connecting rod mechanism composed of the second swing rod 61 and the third connecting rod 63, when the second swing rod 61 moves upward, the second swing rod 61 can drive the front part of the third connecting rod 63 to move upward, so that the rear part of the third connecting rod 63 rotates relative to the front part of the third connecting rod 63 in the direction of approaching the front wheel support 4, thus driving the lower part of the rear wheel support 3 connected to the rear part of the third connecting rod 63 and the lower part of the front wheel support 4 to close to each other, and further realizing the relative rotation and closing of the rear wheel support 3 and the front wheel support 4. In the third embodiment of the present embodiment, based on the connecting rod mechanism composed of the second swing rod 61, the second connecting rod 62 and the third connecting rod 63, when the second swing rod 61 moves upward, the second swing rod 61 can drive the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 to move upward, so that the front part of the second connecting rod 62 rotates relative to the rear part of the second connecting rod 62 in the direction of approaching the rear wheel support 3, and the rear part of the third connecting rod 63 rotates relative to the front part of the third connecting rod 63 in the direction of approaching the front wheel support 4, that is, the front part of the second connecting rod 62 and the rear part of the third connecting rod 63 close to each other, thus driving the lower part of the front wheel support 4 connected to the front part of the second connecting rod 62 and the lower part of the rear wheel support 3 connected to the rear part of the third connecting rod 63 to close to each other, and further realizing the relative rotation and closing of the front wheel support 4 and the rear wheel support 3.

[0097] The lower part of the second swing rod 61 can be rotatably connected to the rear part of the second connecting rod 62, or the lower part of the second swing rod 61 can be rotatably connected to the front part of the third connecting rod 63, or the lower part of the second swing rod 61 can be rotatably connected to a rotation connecting point between the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 (i.e. the lower part of the second swing rod 61 is rotatably connected to the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 at the same time), so that the upward movement of the second swing rod 61 can directly or indirectly drive the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 to move upward. Here, no limitation is made.

[0098] Based on the above principle, in the actual folding process, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 6 , when the first support 1 is counterclockwise relative to the second support 2 to fold, the lower part of the first support 1 drives the first swing rod 51 to swing, the lower part of the first swing rod 51 further drives the rear wheel support 3 to rotate counterclockwise relative to the second support 2, so that the lower part of the rear wheel support 3 is synchronously rotated counterclockwise relative to the second support 2 along with the counterclockwise rotation of the first support 1; at the same time, the lower part of the first support 1 will drive the second swing rod 61 to swing, and the lower part of the second swing rod 61 will gradually approach the lower part of the second support 2 during the swinging process (i.e. gradually approach the rotation connecting point between the upper part of the front wheel support 4, the upper part of the rear wheel support 3 and the lower part of the second support 2), so that the lower part of the second swing rod 61 will pull the rear part of the second connecting rod 62 and / or the front part of the third connecting rod 63 to move in the direction of approaching the lower part of the second support 2, so as to bring the lower part of the front wheel support 4 and the lower part of the rear wheel support 3 closer to each other, thereby realizing the relative rotation and folding of the front wheel support 4 and the rear wheel support 3; when the first support 1 is rotated relative to the second support 2 to the right position, the folding operation between the first support 1 and the second support 2 is completed, the rear wheel support 3 is also folded relative to the second support 2 to the right position under the drive of the first swing rod 51, and the front wheel support 4 is also folded relative to the rear wheel support 3 to the right position under the drive of the second swing rod 61, the second connecting rod 62 and the third connecting rod 63, at this time, the carrier is in the folded state as shown in Figure 3 .

[0099] Preferably, as shown in Figures 1 to 6 , the first swing rod 51 and the second swing rod 61 can refer to the same swing rod, and the rotation connecting point between the upper part of the rear wheel support 3 and the lower part of the first swing rod 51 (the second swing rod 61) can be arranged above the rotation connecting point between the lower part of the first swing rod 51 (the second swing rod 61) and the rear part of the second connecting rod 62 and / or the front part of the third connecting rod 63; as shown in Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, when the lower part of the first swing lever 51 (the second swing lever 61) drives the rear wheel support 3 to rotate counterclockwise relative to the second support 2, the lower part of the rear wheel support 3 is synchronously folded along the counterclockwise direction towards the second support 2 with the counterclockwise rotation of the first support 1 relative to the second support 2, at the same time, the lower part of the first swing lever 51 (the second swing lever 61) also pulls the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 to move towards the lower part of the second support 2, so as to drive the lower part of the front wheel support 4 connected to the front part of the second connecting rod 62 and the lower part of the rear wheel support 3 connected to the rear part of the third connecting rod 63 to approach each other, thereby finally realizing the folding operation of the carrier. By setting the first swing lever 51 and the second swing lever 61 as the same swing lever, the structure of the carrier can be further simplified and optimized while completing the above folding and unfolding operations of the carrier.

[0100] In an embodiment, with reference to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 9 and Figure 10 , the second linkage mechanism 6 further comprises a fourth connecting rod 64, the fourth connecting rod 64 extends in the up-down direction in the unfolded state, the upper part of the fourth connecting rod 64 is rotationally connected to the lower part of the second swing lever 61, and the lower part of the fourth connecting rod 64 is rotationally connected to the rear part of the second connecting rod 62 and / or the front part of the third connecting rod 63.

[0101] The second swing lever 61 pulls the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 to approach the lower part of the second support 2 through the fourth connecting rod 64 under the drive of the first support 1.

[0102] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 6 , when the first support 1 is folded counterclockwise relative to the second support 2, the lower part of the first support 1 will drive the second swing lever 61 to swing, and the lower part of the second swing lever 61 will gradually approach the lower part of the second support 2 (i.e., gradually approach the rotation connection point between the upper part of the front wheel support 4, the upper part of the rear wheel support 3 and the lower part of the second support 2) during the swinging process, so that the lower part of the second swing lever 61 will pull the upper part of the fourth connecting rod 64 to move towards the lower part of the second support 2, and then the lower part of the fourth connecting rod 64 will pull the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 to move towards the lower part of the second support 2, so as to drive the lower part of the front wheel support 4 connected to the front part of the second connecting rod 62 and the lower part of the rear wheel support 3 connected to the rear part of the third connecting rod 63 to approach each other, thereby realizing the relative rotation and folding of the front wheel support 4 and the rear wheel support 3.

[0103] The embodiment can improve the movement freedom of the second linkage mechanism 6 by adding the fourth connecting rod 64 between the second swing rod 61 and the second connecting rod 62 and the third connecting rod 63, and can better adapt to the relative position change between the second swing rod 61 and the second connecting rod 62 and the third connecting rod 63 by the rotation of the fourth connecting rod 64 itself, thereby avoiding the problem of jamming during the movement of the second connecting rod 62 and the third connecting rod 63 driven by the second swing rod 61.

[0104] The lower part of the fourth connecting rod 64 can be rotatably connected to the rear part of the second connecting rod 62 as shown in Figure 9 , or the lower part of the fourth connecting rod 64 can be rotatably connected to the front part of the third connecting rod 63 as shown in Figure 10 , or the lower part of the fourth connecting rod 64 can be rotatably connected to the rotation connection point between the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 as shown in Figure 4 , that is, the lower part of the fourth connecting rod 64 is rotatably connected to the rear part of the second connecting rod 62 and the front part of the third connecting rod 63. In this way, the upward movement of the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 can be directly or indirectly driven by the upward movement of the fourth connecting rod 64, which is not limited here.

[0105] In an embodiment, referring to Figures 1 to 6 , the rear part of the second connecting rod 62, the front part of the third connecting rod 63, and the lower part of the fourth connecting rod 64 are rotatably connected to each other around the eighth axis X8.

[0106] In the embodiment, as shown in Figure 4 , the rotation connection points between the rear part of the second connecting rod 62, the front part of the third connecting rod 63, and the lower part of the fourth connecting rod 64 are arranged in a straight line. In this way, while ensuring the driving effect of the fourth connecting rod 64 on the second connecting rod 62 and the third connecting rod 63, the number of rotation connection points and corresponding rotation connection devices in the second linkage mechanism 6 can be reduced, thereby further simplifying and optimizing the structure of the carrier.

[0107] In an embodiment, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 11 , and Figure 12 , the carrier further comprises a seat mechanism 7 and a fourth linkage mechanism 9, and the seat mechanism 7 comprises a seat part 71 rotatably connected to the rear wheel support 3 around a fifth axis X5.

[0108] The fourth linkage mechanism 9 comprises a fifth link 91 extending in the up-down direction in the unfolded state, an upper portion of the fifth link 91 being rotatably connected to the seat portion 71 about a ninth axis X9 located rearward of the fifth axis X5, a lower portion of the fifth link 91 being rotatably connected to the rear portion of the second link 62 and / or the front portion of the third link 63; when the second swing link 61 drives the rear portion of the second link 62 and / or the front portion of the third link 63 to move upward, the fifth link 91 drives the rear portion of the seat portion 71 to rotate toward the rear wheel support 3 to fold the front portion of the seat mechanism 7.

[0109] In particular, the seat mechanism 7 is generally used to connect a seat assembly of a vehicle and provide support for the seat assembly so that an occupant can safely sit on the seat assembly; the seat portion 71 is a portion of the seat mechanism 7 directly connected to the seat assembly.

[0110] As Figure 4As shown, the fifth link 91 can extend rearwardly from bottom to top, the upper part of the fifth link 91 is rotatably connected with the rear part of the seat mechanism 7 about the ninth axis X9, and the lower part of the fifth link 91 is rotatably connected with the rear part of the second link 62 and / or the front part of the third link 63; when the first support 1 is rotated counterclockwise relative to the second support 2 to fold, the lower part of the first support 1 drives the second swing link 61 to swing, and the lower part of the second swing link 61 will gradually approach the lower part of the second support 2 (i.e. gradually approach the rotatable connection point between the upper part of the front wheel support 4, the upper part of the rear wheel support 3 and the lower part of the second support 2) in the process of swinging, so that the lower part of the second swing link 61 will pull the upper part of the fourth link 64 to move towards the lower part of the second support 2, and then the lower part of the fourth link 64 will pull the rear part of the second link 62 and the front part of the third link 63 to move towards the lower part of the second support 2, so as to drive the lower part of the front wheel support 4 connected to the front part of the second link 62 and the lower part of the rear wheel support 3 connected to the rear part of the third link 63 to approach each other, so as to realize the relative rotation and folding of the front wheel support 4 and the rear wheel support 3; in the process of moving the rear part of the second link 62 and the front part of the third link 63 towards the lower part of the second support 2, the rear part of the second link 62 and / or the front part of the third link 63 will push the fifth link 91 upwards, so that the fifth link 91 moves towards the rear part of the seat part 71, so that the upper part of the fifth link 91 pushes the rear part of the seat part 71 to rotate away from the rear wheel support 3, so that the seat part 71 rotates counterclockwise as a whole, and then drives the front part of the seat part 71 to rotate counterclockwise relative to the rear wheel support 3, so that the front part of the seat part 71 gradually rotates and folds towards the rear wheel support 3; when the rear wheel support 3 is folded on the second support 2 under the drive of the first swing link 51, the front wheel support 4 is also folded on the rear wheel support 3 under the drive of the second swing link 61, the fourth link 64, the second link 62 and the third link 63, and the seat part 71 is also folded on the second support 2 under the drive of the second link 62, the third link 63 and the fifth link 91, so that the vehicle is in the folding state as shown in Figure 3 The rear wheel support 3, the front wheel support 4 and the seat mechanism 7 do not interfere with each other.

[0111] When it is needed to reset the vehicle in the folding state to the unfolded state, it is only needed to rotate the first support 1 relative to the second support 2 in the opposite direction to drive the rear wheel support 3 to rotate in the opposite direction through the first swing link 51, and to drive the front wheel support 4 and the seat part 71 to rotate in the opposite direction through the second swing link 61, the fourth link 64, the second link 62, the third link 63 and the fifth link 91; when the first support 1 is unfolded relative to the second support 2, the rear wheel support 3, the front wheel support 4 and the seat part 71 are also unfolded relative to the second support 2, so that the vehicle is reset to the unfolded state as shown in Figure 1 .

[0112] The lower part of the fifth connecting rod 91 can be rotatably connected to the rear part of the second connecting rod 62 as shown in Figure 4 , or the lower part of the fifth connecting rod 91 can be rotatably connected to the front part of the third connecting rod 63 as shown in Figure 12 , or the lower part of the fifth connecting rod 91 can be rotatably connected to the rotatable connecting point between the rear part of the second connecting rod 62 and the front part of the third connecting rod 63 as shown in Figure 11 , that is, the lower part of the fifth connecting rod 91 is rotatably connected to both the rear part of the second connecting rod 62 and the front part of the third connecting rod 63. In this way, the fifth connecting rod 91 can be directly or indirectly driven to move by the movement of the rear part of the second connecting rod 62 and the movement of the front part of the third connecting rod 63, and then the seat part 71 is driven to rotate by the fifth connecting rod 91. Here, no limitation is made.

[0113] Based on the above arrangement, the rotation folding of the rear wheel support 3, the front wheel support 4, the seat mechanism 7 and other parts on the carrier can be completed with the aid of gravity only by driving the first support 1 to rotate relative to the second support 2, thereby further improving the convenience of folding and storing the carrier.

[0114] In an embodiment, referring to Figure 11 , the rear part of the second connecting rod 62, the front part of the third connecting rod 63 and the lower part of the fifth connecting rod 91 are coaxially rotatably connected around the tenth axis X10; or,

[0115] When the fifth connecting rod 91 is connected to the second connecting rod 62, the connecting point of the fifth connecting rod 91 and the second connecting rod 62 is located in front of the connecting point of the second connecting rod 62 and the second swing rod 61 or the third connecting rod 63; or,

[0116] When the fifth connecting rod 91 is connected to the third connecting rod 63, the connecting point of the fifth connecting rod 91 and the third connecting rod 63 is located behind the connecting point of the second connecting rod 62 and the second swing rod 61 or the third connecting rod 63.

[0117] When the rotatable connecting point between the rear part of the second connecting rod 62, the front part of the third connecting rod 63 and the lower part of the fifth connecting rod 91 is arranged in a line (that is, coaxially rotatably connected around the tenth axis X10), the number of rotatable connecting points and corresponding rotatable connecting devices in the second linkage mechanism 6 and the fourth linkage mechanism 9 can be reduced while ensuring the driving effect of the second connecting rod 62 and the third connecting rod 63 on the fifth connecting rod 91, thereby further simplifying and optimizing the structure of the carrier.

[0118] Preferably, referring to Figure 11The rotation connecting points between the rear part of the second connecting rod 62, the front part of the third connecting rod 63, the lower part of the fourth connecting rod 64 and the lower part of the fifth connecting rod 91 are arranged in a same line, so that the number of rotation connecting points and corresponding rotation connecting devices in the second linkage mechanism 6 and the fourth linkage mechanism 9 can be further reduced, and the structure of the carrier can be further simplified and optimized.

[0119] In an embodiment, referring to Figures 7 to 12 The middle part of the seat mechanism 7, the upper part of the rear wheel support 3 and the upper part of the front wheel support 4 are coaxially rotationally connected to the lower part of the second support 2.

[0120] The seat mechanism 7 further comprises a backrest part (not shown in the figure), which is arranged to be rotationally connected to the seat part 71; when the carrier is converted into the folded state, the seat part 71 and the backrest part are respectively rotated in the same or different directions.

[0121] When the carrier is converted into the folded state, the third linkage mechanism 8 drives the seat part 71 to rotate counterclockwise and approach the rear wheel support 3, so that the connection part between the seat part 71 and the backrest part is moved upward.

[0122] In the embodiment, the rotation connecting points between the middle part of the seat mechanism 7, the upper part of the rear wheel support 3, the upper part of the front wheel support 4 and the lower part of the second support 2 are arranged in a same line, so that the number of rotation connecting points and corresponding rotation connecting devices in the carrier can be reduced while ensuring that the seat mechanism 7, the rear wheel support 3 and the front wheel support 4 can rotate relative to the second support 2, and the structure of the carrier can be further simplified and optimized.

[0123] The backrest part refers to a part of the seat mechanism 7 that can be used for the back of a passenger to lean against, and the backrest part has a certain included angle relative to the seat part in the unfolded state of the carrier. In the folding process of the carrier, the third linkage mechanism 8 can simultaneously drive the seat part 71 and the backrest part to rotate counterclockwise so that the seat mechanism 7 is folded onto the rear wheel support 3; at the same time, the backrest part can rotate clockwise or counterclockwise relative to the seat part 71 to be folded toward the seat part 71. Based on the above arrangement, when the seat mechanism 7 is folded as a whole on the rear wheel support 3, the backrest part can also be folded relative to the seat part 71, so that the overall folding of the carrier can be completed without interrupting the backrest part and to a certain extent avoiding the backrest part from scratching the ground.

[0124] The above merely describes exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by referring to the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A vehicle having an unfolded state and a folded state, characterized in that, The vehicle includes: The first support extends vertically when unfolded. The second support extends vertically in the unfolded state, and the upper part of the second support is rotatably connected to the lower part of the first support. The rear wheel bracket extends vertically when deployed. The front wheel bracket extends vertically in the unfolded state; two of the second bracket, the front wheel bracket, and the rear wheel bracket are rotatably connected, and the third bracket is rotatably connected to either of the aforementioned two, or the three are rotatably connected coaxially. A first linkage mechanism is connected between the first bracket and the rear wheel bracket; when the upper part of the first bracket in the unfolded state rotates and retracts towards the second bracket, the first linkage mechanism drives the rear wheel bracket to rotate and retract towards the second bracket under the drive of the first bracket. The second linkage mechanism is connected between the first bracket and the front wheel bracket; when the upper part of the first bracket in the unfolded state rotates and retracts towards the second bracket, the second linkage mechanism, driven by the first bracket, drives the front wheel bracket to rotate and retract towards the rear wheel bracket.

2. The vehicle according to claim 1, characterized in that, The vehicle also includes a seat mechanism and a third linkage mechanism. The seat mechanism extends in the front-to-back direction when unfolded. The seat mechanism includes a seat portion, which is rotatably connected to the rear wheel bracket. The third linkage mechanism is connected between the seat and the first linkage mechanism, or the third linkage mechanism is connected between the seat and the second linkage mechanism; when the vehicle is converted to the folded state, the first linkage mechanism or the second linkage mechanism drives the seat to move and move closer to the rear wheel bracket through the third linkage mechanism; The third linkage mechanism includes a first link.

3. The vehicle according to claim 1, characterized in that, The first linkage mechanism includes a first swing arm, which extends vertically in the unfolded state. The upper part of the first swing arm is rotatably connected to the lower part of the first bracket, and the lower part of the first swing arm is rotatably connected to the upper part of the rear wheel bracket. Driven by the first bracket, the first swing arm pulls the rear wheel bracket toward the second bracket to rotate and retract.

4. The vehicle according to claim 3, characterized in that, The upper part of the second bracket is rotatably connected to the lower part of the first bracket about the first axis, the upper part of the rear wheel bracket is rotatably connected to the lower part of the second bracket about the second axis, the lower part of the first swing arm is rotatably connected to the upper part of the rear wheel bracket about the third axis, and the upper part of the first swing arm is rotatably connected to the lower part of the first bracket about the fourth axis; the first axis, the second axis, the third axis, and the fourth axis are parallel to each other, the first axis is located above the fourth axis, and the second axis is located above the third axis.

5. The vehicle according to claim 4, characterized in that, The vehicle also includes a seat mechanism and a third linkage mechanism. The seat mechanism extends in the front-to-back direction when unfolded. The seat mechanism includes a seat portion, which is rotatably connected to the rear wheel bracket about a fifth axis. The third linkage mechanism includes a first link, the front part of which is rotatably connected to the front part of the seat about a sixth axis, and the rear part of which is rotatably connected to the first swing arm about a seventh axis. The sixth axis is located in front of the fifth axis, and the seventh axis is located above the third axis; When the first rocker arm pulls the lower part of the rear wheel bracket to rotate and retract toward the second bracket, the first connecting rod, driven by the first rocker arm, pulls the front part of the seat to rotate and retract toward the rear wheel bracket.

6. The vehicle according to claim 1, characterized in that, The second linkage mechanism includes a second swing arm and a second connecting rod. The second swing arm extends vertically in the unfolded state, and the second connecting rod extends forward and backward in the unfolded state. The front part of the second connecting rod is rotatably connected to the lower part of the front wheel bracket, the upper part of the second swing arm is rotatably connected to the lower part of the first bracket, and the lower part of the second swing arm is connected to the rear part of the second connecting rod. The second swing arm pulls the second connecting rod under the drive of the first bracket, so that the front wheel bracket and the rear wheel bracket move closer together. And / or, the second linkage mechanism includes a second swing arm and a third link. The second swing arm extends vertically in the unfolded state, and the third link extends longitudinally in the unfolded state. The rear part of the third link is rotatably connected to the lower part of the rear wheel bracket, and the upper part of the second swing arm is rotatably connected to the lower part of the first bracket. The lower part of the second swing arm is connected to the front part of the third link. The second swing arm pulls the third link under the drive of the first bracket, so that the front wheel bracket and the rear wheel bracket move closer together.

7. The vehicle according to claim 6, characterized in that, The second linkage mechanism further includes a fourth link, which extends vertically in the unfolded state. The upper part of the fourth link is rotatably connected to the lower part of the second swing arm, and the lower part of the fourth link is rotatably connected to the rear part of the second link and / or the front part of the third link. Driven by the first bracket, the second swing arm pulls the rear part of the second link and the front part of the third link close to the lower part of the second bracket via the fourth link; The rear part of the second link, the front part of the third link, and the lower part of the fourth link are rotatably connected to each other about the eighth axis.

8. The vehicle according to claim 6, characterized in that, The vehicle also includes a seat mechanism and a fourth linkage mechanism. The seat mechanism extends in the front-to-back direction when unfolded. The seat mechanism includes a seat portion, which is rotatably connected to the rear wheel bracket about a fifth axis. The fourth linkage mechanism includes a fifth link, which extends vertically in the unfolded state. The upper part of the fifth link is rotatably connected to the seat portion around a ninth axis, which is located behind the fifth axis. The lower part of the fifth link is rotatably connected to the rear part of the second link and / or the front part of the third link. When the second swing arm drives the rear part of the second link and / or the front part of the third link to move upward, the fifth link, driven by the second link and / or the third link, pushes the rear part of the seat portion, thereby causing the front part of the seat mechanism to rotate and retract toward the rear wheel bracket.

9. The vehicle according to claim 8, characterized in that, The rear part of the second link, the front part of the third link, and the lower part of the fifth link are coaxially rotatably connected about the tenth axis; or, When the fifth link is connected to the second link, the connection point between the fifth link and the second link is located in front of the connection point between the second swing arm and the second link or the third link; or... When the fifth link is connected to the third link, the connection point of the fifth link and the third link is located behind the connection point of the second swing arm and the second link or the third link.

10. The vehicle according to claim 2, characterized in that, The middle part of the seat mechanism, the upper part of the rear wheel bracket, and the upper part of the front wheel bracket are coaxially rotatably connected to the lower part of the second bracket; The seat mechanism also includes a backrest, which is rotatably disposed relative to the seat portion; when the vehicle is converted to the folded state, the seat portion and the backrest rotate in the same or different directions respectively; When the vehicle is converted to the folded state, the third linkage mechanism drives the seat to rotate counterclockwise and move closer to the rear wheel bracket, causing the connection between the seat and the backrest to move upward.

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