Wide-body folding stroller

Abstract

The application discloses a wide-body folding handcart, which comprises a frame main body and a cabin main body. The frame main body comprises a front support, a rear support, a push handle support and a sliding locking assembly. The middle section of the front support and the middle section of the rear support are cross and fixed relatively rotatably. The front lower section of the push handle support is slidably connected with the rear upper section of the front support. The control end of the sliding locking assembly is arranged on the push handle support. The locking end of the sliding locking assembly acts on the front support and the push handle support. The cabin main body comprises a cabin support and a cabin sleeve. The front lower end of the cabin support is hinged to the front upper end of the rear support. The rear upper end of the cabin support is hinged to the push handle support. The width of the cabin support is greater than the width of the frame main body. The cabin sleeve is fixedly sleeved on the cabin support. The cabin main body is arranged on the frame main body, so that the width of the cabin support is greater than the width of the frame main body, the width of the cabin main body is increased, and a larger cabin space is obtained.

Description

Technical Field

[0001] This invention relates to the field of transportation technology, and more specifically to a wide-body folding handcart. Background Technology

[0002] Folding strollers are an important means of transportation in modern life, including pet folding strollers and baby folding strollers.

[0003] Existing folding strollers for pets or infants have the following problems: 1. The unfolded seat is located inside the frame, and due to the limited frame width, the seat is relatively narrow. Only by widening the frame can a larger seat space be achieved; 2. Some folding strollers require a secondary fold to reduce their folded size, which is inconvenient to use and makes the structure more complex; 3. While some folding strollers can achieve a very small folded size with a single fold, they still suffer from the first problem mentioned above. Therefore, people expect a type of folding stroller for infants and pets that can achieve a large seat space without increasing the width of the stroller; require only a single fold for easy use; and have a smaller folded size for easy portability. Summary of the Invention

[0004] Therefore, the present invention provides a wide-body folding handcart to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A wide-body folding handcart includes a frame body and a cabin body. The frame body includes a front support, a rear support, and a push handle support. The middle sections of the front support and the rear support are intersected and rotatably fixed. The push handle support is slidably connected to the front support. The cabin body includes a cabin support and a cabin cover. The lower front end of the cabin support is hinged to the upper front end of the rear support, and the upper rear end of the cabin support is hinged to the push handle support. The width of the cabin support is greater than the width of the frame body, and the cabin cover is fixedly fitted onto the cabin support.

[0007] Furthermore, the frame body also includes a sliding locking assembly. The control end of the sliding locking assembly is disposed on the push handle bracket, and the locking end of the sliding locking assembly acts on the front bracket and the push handle bracket to lock or unlock the fixed relationship between the front bracket and the push handle bracket.

[0008] Furthermore, the wide-body folding trolley also includes front combination wheels and rear combination wheels, with the front combination wheels mounted on the lower front end of the front support and the rear combination wheels mounted on the lower rear end of the rear support.

[0009] Furthermore, the front bracket and the rear bracket are hinged together by a first pivot, the cockpit bracket and the rear bracket are hinged together by a second pivot, and the cockpit bracket and the push handle bracket are hinged together by a third pivot.

[0010] Furthermore, the sliding locking assembly includes a sliding sleeve, a push rod, a locking sleeve, and a locking plate. The sliding sleeve is slidably fitted onto the outside of the push handle bracket. The push rod, locking sleeve, and locking plate are all disposed inside the push handle bracket. One end of the push rod is connected to the sliding sleeve, and the other end of the push rod is connected to the locking sleeve. The locking sleeve can move axially along the push rod under the drive of the push rod. One side of the locking plate is provided with a protruding locking tongue. The push handle bracket is provided with a window corresponding to the position of the locking tongue. The locking plate is connected to the locking sleeve and moves radially along the push handle bracket under the drive of the locking sleeve. The front bracket is provided with a first slot and a second slot. When the wide-body folding trolley is unfolded, the first slot corresponds to the position of the window. When the wide-body folding trolley is folded, the second slot corresponds to the position of the window.

[0011] Furthermore, the push handle bracket has a first oblong hole at the position where the sliding sleeve is fitted. The length direction of the first oblong hole is along the axial direction of the push handle bracket. The sliding sleeve has a first pin hole through which a fourth rotating shaft passes. The fourth rotating shaft can slide along the first oblong hole. One end of the push rod is hinged to the middle section of the fourth rotating shaft, and the other end of the push rod is connected to one end of the locking sleeve via a fifth rotating shaft. The locking sleeve has a second oblong hole and a third oblong hole near its two ends, respectively. The length direction of both the second oblong hole and the third oblong hole is along the axial direction of the push handle bracket. A second pin hole is provided between the second oblong hole and the third oblong hole. The push handle bracket has a third pin hole corresponding to the position of the second oblong hole. A fourth pin hole is provided at the position of the third oblong hole. A fourth oblong hole is provided at the position of the second oblong hole on the locking plate. A fifth oblong hole is provided at the position of the third oblong hole. The length direction of the fourth oblong hole and the fifth oblong hole is arranged along the radial direction of the push handle bracket. A sixth oblong hole is provided at the position of the second pin hole. The length direction of the sixth oblong hole forms an angle of less than 90° with the radial direction of the push handle bracket. A sixth rotating shaft passes through the third pin hole and is disposed within the second oblong hole and the fourth oblong hole. A seventh rotating shaft passes through the fourth pin hole and is disposed within the third oblong hole and the fifth oblong hole. An eighth rotating shaft passes through the second pin hole and is disposed within the sixth oblong hole.

[0012] Furthermore, the middle section of the push rod is provided with a seventh waist-shaped hole, and the push handle bracket is provided with a fifth pin hole at the position corresponding to the seventh waist-shaped hole. A ninth rotating shaft passes through the fifth pin hole and is also passed through the seventh waist-shaped hole.

[0013] Optionally, the lower front section of the push handle bracket is slidably inserted into the upper rear section of the front bracket.

[0014] Optionally, two sliding fixing sleeves are fixed on the outer side of the upper rear section of the front bracket, with the sleeve holes of the sliding fixing sleeves located above the front bracket, and the lower front section of the push handle bracket is slidably inserted into the sleeve holes of the sliding fixing sleeves.

[0015] Optionally, the upper rear end of the front bracket is provided with a sliding swing sleeve, and the push handle bracket is slidably and swingably connected to the front bracket through the sliding swing sleeve; the sliding locking assembly includes a sliding sleeve, a push rod, a card seat, a card sleeve, a swing rod, and a card shaft. The sliding sleeve is slidably sleeved on the outside of the push handle bracket, the push rod is disposed inside the push handle bracket, one end of the push rod is connected to the sliding sleeve, two card seats are provided, both of which are fixed on the front bracket and spaced apart, each card seat has a card slot, two card sleeves are provided, both of which are slidably sleeved on the push handle bracket, each card sleeve has the card shaft passing through it, the card shaft is connected to the other end of the push rod, one end of the swing rod is hinged to the front bracket located between the two card seats, and the other end is hinged to the push handle bracket located between the two card sleeves.

[0016] The present invention has the following advantages:

[0017] Compared to existing folding strollers for infants or pets, the wide-body folding stroller provided by this invention, without changing the width of the main frame, allows the width of the seat frame to be greater than the width of the main frame by setting the main body of the seat on the main frame. This increases the overall width of the main body of the seat, resulting in a larger seat space when unfolded. Moreover, the technical solution of "relative rotation of the front and rear supports" + "the front and rear ends of the seat frame are respectively hinged to the rear support and the push handle support" is simple in structure, saves resources, reduces waste, and can be folded in one go, making it convenient to use. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1 A schematic diagram of the unfolded state of the first type of wide-body folding handcart provided in Embodiment 1;

[0021] Figure 2 An exploded view of the first wide-body folding handcart provided in Example 1 (without the cabin cover);

[0022] Figure 3 An exploded view of the sliding locking assembly of the first type of wide-body folding trolley provided in Embodiment 1;

[0023] Figure 4 This is a structural diagram of the first type of wide-body folding trolley provided in Example 1 in its folded state (lying down);

[0024] Figure 5 This is a side view of the unfolded state of the second type of wide-body folding trolley provided in Embodiment 2;

[0025] Figure 6 This is a structural diagram (vertical) of the second type of wide-body folding handcart provided in Example 2 in its folded state;

[0026] Figure 7 A schematic diagram of the unfolded state of the third type of wide-body folding trolley provided in Example 3;

[0027] Figure 8 An exploded view of the third type of wide-body folding handcart provided in Example 3;

[0028] Figure 9 This is a structural diagram of the third type of wide-body folding trolley provided in Example 3, in its folded state (lying down).

[0029] Figure 10 A schematic diagram of the unfolded state of the fourth type of wide-body folding handcart provided in Example 4;

[0030] Figure 11 An exploded view of the fourth type of wide-body folding handcart provided in Example 4;

[0031] Figure 12This is a schematic diagram of the folding-unfolding process of the fourth type of wide-body folding trolley provided in Example 4 (it is now unlocked);

[0032] Figure 13 This is a structural diagram (vertical) of the fourth type of wide-body folding handcart provided in Example 4 in its folded state.

[0033] In the diagram: 1-Front bracket, 2-Rear bracket, 3-Front combination wheel, 4-Rear combination wheel, 5-First pivot, 6-Push handle bracket, 7-Sliding fixing sleeve, 8-Second pivot, 9-Third pivot, 10-Sliding sleeve, 11-Push rod, 12-Locking sleeve, 13-Locking plate, 14-Fourth pivot, 15-Fifth pivot, 16-Sixth pivot, 17-Seventh pivot, 18-Eighth pivot, 19-Ninth pivot, 20-Cockpit bracket, 21-Cockpit sleeve, 22-First pin hole, 23-First waist shape Hole 24 - Second oblong hole, 25 - Third oblong hole, 26 - Second pin hole, 27 - Third pin hole, 28 - Fourth pin hole, 29 - Fourth oblong hole, 30 - Fifth oblong hole, 31 - Sixth oblong hole, 32 - Locking tongue, 33 - First slot, 34 - Seventh oblong hole, 35 - Fifth pin hole, 36 - Sliding swing sleeve, 37 - Card seat, 38 - Swing rod, 39 - Card sleeve, 40 - Pin, 41 - Card pin, 42 - Tenth pivot, 43 - Eleventh pivot, 44 - Eighth oblong hole. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0036] Example 1

[0037] like Figures 1 to 4As shown, Embodiment 1 provides a wide-body folding trolley, including a frame body and a cabin body. The frame body includes a front support 1, a rear support 2, front combination wheels 3, rear combination wheels 4, a first pivot 5, a push handle bracket 6, a sliding fixing sleeve 7, a second pivot 8, a third pivot 9, and a sliding locking assembly. The sliding locking assembly includes a sliding sleeve 10, a push rod 11, a locking sleeve 12, a locking plate 13, a fourth pivot 14, a fifth pivot 15, a sixth pivot 16, a seventh pivot 17, an eighth pivot 18, and a ninth pivot 19. The cabin body includes a cabin support 20 and a cabin cover 21.

[0038] The middle sections of the front bracket 1 and the rear bracket 2 intersect, forming an X-shape when viewed from the side. A first pivot 5 passes through the intersection, allowing them to be fixed in a rotatable manner. The front combination wheel 3 is mounted on the lower front end of the front bracket 1, and the rear combination wheel 4 is mounted on the lower rear end of the rear bracket 2. The connection relationship, shape, and structure of the front bracket 1, rear bracket 2, front combination wheel 3, and rear combination wheel 4 can all adopt existing designs, but this embodiment does not limit the use of new designs.

[0039] The lower front section of the push handle bracket 6 is slidably connected to the upper rear section of the front bracket 1. Both sections are straight segments with parallel axes. Two sliding fixing sleeves 7 are spaced apart on the upper rear section of the front bracket 1. The holes of the sliding fixing sleeves 7 are located above the front bracket 1. The lower front section of the push handle bracket 6 is slidably inserted into the holes of the sliding fixing sleeves 7, thus achieving a sliding connection between the push handle bracket 6 and the front bracket 1. In fact, the sliding fixing sleeve 7 has a double-hole structure. One hole is fitted over the upper rear section of the front bracket 1, and the sliding fixing sleeve 7 is relatively fixed to the front bracket 1 by tightening the fastening screw. The other hole is used to slide through the lower front section of the push handle bracket 6. The push handle bracket 6 can also adopt an existing design, but this embodiment does not limit the use of new designs.

[0040] The lower front end of the cockpit bracket 20 is hinged to the upper front end of the rear bracket 2 via the second pivot 8, and the upper rear end of the cockpit bracket 20 is hinged to the push handle bracket 6 via the third pivot 9. Because the cockpit bracket 20 is located on the main body of the frame, it is possible to widen the cockpit bracket 20. In this embodiment, the width of the cockpit bracket 20 is greater than the width of the main body of the frame. The cockpit cover 21 is fixedly fitted onto the cockpit bracket 20. The cockpit cover 21 is made of soft material, such as fabric or mesh.

[0041] The above descriptions are all for one side. In fact, the first rotating shaft 5, the second rotating shaft 8, the third rotating shaft 9, and the sliding fixed sleeve 7 are all symmetrically arranged on the left and right sides.

[0042] Compared to existing folding strollers for infants or pets, the wide-body folding stroller provided in this embodiment, without changing the width of the main frame, allows the width of the seat frame 20 to be greater than the width of the main frame by setting the main body of the seat on the main frame. This increases the overall width of the main body of the seat, providing a larger seat space when unfolded. Moreover, the technical solution of "relative rotation of the front support 1 and the rear support 2" + "the front and rear ends of the seat frame 20 are respectively hinged to the rear support 2 and the push handle support 6" is simple in structure, saves resources, reduces waste, and can complete the folding process in one fold, making it convenient to use.

[0043] The control end of the sliding locking assembly is located on the push handle bracket 6, and the locking end of the sliding locking assembly acts on the front bracket 1 and the push handle bracket 6 to lock or unlock the fixed relationship between the front bracket 1 and the push handle bracket 6. In this embodiment, the sliding locking assembly and the holes, windows and grooves used with it are also designed symmetrically on the left and right sides. The following description focuses only on the structure of one side.

[0044] The sliding sleeve 10 is slidably fitted onto the outside of the push handle bracket 6, and each of the left and right sides of the sliding sleeve 10 is provided with a first pin hole 22. The push handle bracket 6 has two symmetrical first oblong holes 23 at the position where the sliding sleeve 10 is fitted, and the length direction of the first oblong holes 23 is arranged along the axial direction of the push handle bracket 6. The two ends of the fourth rotating shaft 14 are fixed in the two first pin holes 22, and the fourth rotating shaft 14 passes through the two first oblong holes 23; the fourth rotating shaft 14 can slide along the first oblong holes 23, so that when the sliding sleeve 10 slides along the axial direction of the push handle bracket 6, it is guided and limited by the first oblong holes 23. The push rod 11, the locking sleeve 12, and the locking plate 13 are all arranged inside the push handle bracket 6. One end of the push rod 11 is hinged to the middle section of the fourth rotating shaft 14, achieving connection with the sliding sleeve 10. The other end of the push rod 11 is connected to one end of the locking sleeve 12 through the fifth rotating shaft 15, so that the locking sleeve 12 can move along the axial direction of the push rod 11 under the drive of the push rod 11. The locking sleeve 12 has a second oblong hole 24 and a third oblong hole 25 near its two ends, respectively. The length direction of the second oblong hole 24 and the third oblong hole 25 is arranged along the axial direction of the push handle bracket 6. A second pin hole 26 is provided between the second oblong hole 24 and the third oblong hole 25. The push handle bracket 6 has a third pin hole 27 corresponding to the position of the second oblong hole 24 and a fourth pin hole 28 corresponding to the position of the third oblong hole 25. The locking plate 13 has a fourth oblong hole 29 corresponding to the position of the second oblong hole 24 and a fifth oblong hole 30 corresponding to the position of the third oblong hole 25. The length direction of the fourth oblong hole 29 and the fifth oblong hole 30 is arranged along the radial direction of the push handle bracket 6. A sixth oblong hole 31 is provided corresponding to the position of the second pin hole 26. The length direction of the sixth oblong hole 31 forms an angle of less than 90° with the radial direction of the push handle bracket 6. A sixth rotating shaft 16 passes through the third pin hole 27 and is also inserted into the second oblong hole 24 and the fourth oblong hole 29. A seventh pivot 17 passes through the fourth pin hole 28 and is also inserted into the third oblong hole 25 and the fifth oblong hole 30. An eighth pivot 18 passes through the second pin hole 26 and is also inserted into the sixth oblong hole 31. A protruding latch 32 is provided on one side of the locking plate 13, and a window (not shown in the figure) is provided on the push handle bracket 6 corresponding to the position of the latch 32. The front bracket 1 is provided with a first slot 33 and a second slot (not shown in the figure). When the wide-body folding trolley is unfolded, the first slot 33 corresponds to the position of the window, and when the wide-body folding trolley is folded, the second slot corresponds to the position of the window; the second slot may also be omitted.

[0045] Under the limiting and guiding action of the fourth oblong hole 29 and the sixth rotating shaft 16, as well as the fifth oblong hole 30 and the seventh rotating shaft 17, the locking plate 13 can only move along the length direction of the fourth oblong hole 29 and the fifth oblong hole 30. Under the limiting and guiding action of the sixth oblong hole 31 and the eighth rotating shaft 18, when the sliding sleeve 10 slides along the axial direction of the push handle bracket 6, the locking plate 13 is forced to move along the length direction of the fourth oblong hole 29 and the fifth oblong hole 30, and the locking tongue 32 extends out of the window or retracts from the window. After the locking tongue 32 extends out of the window, it is inserted into the first slot 33 or the second slot to realize the locking function. At this time, no matter whether the wide-body folding trolley is in the unfolded state or the folded state, it cannot continue to deform. After the locking tongue 32 retracts from the window, it is no longer inserted into the first slot 33 or the second slot. At this time, the locking state is released, and dynamic transformation of "unfolding" or "folding" can be performed.

[0046] In one optional embodiment, the push rod 11 has a seventh oblong hole 34 in its middle section, and the push handle bracket 6 has a fifth pin hole 35 at the position corresponding to the seventh oblong hole 34. A ninth rotating shaft 19 passes through the fifth pin hole 35 and is also inserted into the seventh oblong hole 34. The seventh oblong hole 34 and the ninth rotating shaft 19 enhance the guiding and limiting functions of the sliding locking assembly. Since the presence of the ninth rotating shaft 19 may affect the movement of the push rod 11, the ninth rotating shaft 19 can be replaced by a third rotating shaft 9. In this case, the ninth rotating shaft 19 is not provided, and the third rotating shaft 9 serves both to fix the cockpit bracket 20 and to guide it, with the fixing function being primary and the guiding function secondary.

[0047] Example 2

[0048] like Figure 5 and 6 As shown, Embodiment 2 provides another wide-body folding trolley, whose structure is basically the same as that of the wide-body folding trolley in Embodiment 1. The only difference is that the length of the push handle bracket 6 and the front bracket 1 that are slidably connected is different. Compared with the form in Embodiment 1 where the lower front section of the push handle bracket 6 is slidably connected to the upper rear section of the front bracket 1, in this embodiment the distance between the two sliding fixing sleeves 7 is increased, so that the first rotating shaft 5 is located between the two sliding fixing sleeves 7, and the sliding fixing sleeve 7 near the front combination wheel 3 is closer to the front combination wheel 3. In this way, it is no longer limited to the lower front section of the push handle bracket 6 being slidably connected to the upper rear section of the front bracket 1, but becomes the front half of the push handle bracket 6 being slidably connected to almost the entire front bracket 1.

[0049] The wide-body folding trolley provided in Example 2 has all the advantages of the wide-body folding trolley in Example 1, which will not be repeated here.

[0050] Example 3

[0051] like Figures 7 to 9 As shown, Embodiment 3 provides a third type of wide-body folding trolley, whose structure is basically similar to that of the wide-body folding trolley in Embodiment 1. For example, the wide-body folding trolley in this embodiment also includes a frame body and a cabin body. The frame body includes a front support 1, a rear support 2, front combination wheels 3, rear combination wheels 4, a first pivot 5, a push handle support 6, a second pivot 8, a third pivot 9, and a sliding locking assembly. The sliding locking assembly includes a sliding sleeve 10, a push rod 11, a locking sleeve 12, a locking plate 13, a fourth pivot 14, a fifth pivot 15, a sixth pivot 16, a seventh pivot 17, an eighth pivot 18, and a ninth pivot 19. The cabin body includes a cabin support 20 and a cabin cover 21. The same structure described above has been described in detail in Embodiment 1 and will not be described again in this embodiment. Unlike the wide-body folding trolley in Embodiment 1, the wide-body folding trolley in this embodiment no longer has a sliding fixing sleeve 7 on its frame body. Instead, the lower front section of the push handle bracket 6 is directly slidably inserted into the upper rear section of the front bracket 1.

[0052] The wide-body folding trolley provided in Example 3 has all the advantages of the wide-body folding trolley in Example 1, which will not be repeated here.

[0053] Example 4

[0054] like Figures 10 to 13 As shown, Embodiment 4 provides a fourth type of wide-body folding trolley, whose structure is basically similar to that of the wide-body folding trolley in Embodiment 1. For example, the wide-body folding trolley in this embodiment also includes a frame body and a cabin body. The frame body includes a front support 1, a rear support 2, a front combination wheel 3, a rear combination wheel 4, a first pivot 5, a push handle support 6, a second pivot 8, a third pivot 9, and a sliding locking assembly; the cabin body includes a cabin support 20 and a cabin cover 21. The same structure described above has been described in detail in Embodiment 1 and will not be described again in this embodiment. The differences from the wide-body folding trolley in Embodiment 1 are twofold: 1. The sliding connection between the push handle support 6 and the front support 1; 2. The structure of the sliding locking assembly.

[0055] In this embodiment, the sliding fixed sleeve 7 is no longer used. Instead, a sliding swing sleeve 36 is installed at the upper rear end of the front bracket 1. The so-called sliding swing sleeve 36 means that the push handle bracket 6 can slide and swing within the kit. Specifically, the sliding swing sleeve 36 has a through hole (not shown in the figure) that is smaller at the upper rear and larger at the lower front. It can be a horn hole or a fan-shaped hole (the fan surface is vertical). This through hole is called the swing hole. The push handle bracket 6 passes through the swing hole and can slide along the swing hole or swing within the swing hole.

[0056] Taking one side as an example, the sliding locking assembly includes two card holders 37, one swing rod 37, two card sleeves 39, two pins 40, two card shafts 41, two rotating shafts, and a sliding sleeve 10, a push rod 11, a fourth rotating shaft 14, and a ninth rotating shaft 19. The arrangement of the sliding sleeve 10, push rod 11, fourth rotating shaft 14, and ninth rotating shaft 19 is the same as in Embodiment 1, and the similarities will not be repeated. The card holder includes a cylindrical sleeve fitted on the front bracket 1 and two cards fixed on the cylindrical sleeve. The two cards are spaced apart so that the push handle bracket 6 can enter between them. The side of the card facing the first rotating shaft 5 has a card groove. Two card holders 37 are spaced apart and fitted onto the front bracket 1, and fixed by pins 40. A tenth pivot 42 passes through the front bracket 1 between the two. One end of the swing rod 37 is hinged to the front bracket 1 via the tenth pivot 42, and the other end is hinged to the push handle bracket 6 via the eleventh pivot 43. Similarly, the eleventh pivot 43 passes through the push handle bracket 6. Two card sleeves 39 are fitted onto the lower section of the push handle bracket 6, with the eleventh pivot located between the two card sleeves 39. Each card sleeve 39 has a card shaft 41 passing through it, fixing the card sleeve 39 to the lower end of the push rod 11. Both ends of the card shaft 41 protrude from the card sleeve 39. In the locked state, the protruding ends of the card shaft 41 can be engaged in the slots of the card holders 37. The push handle bracket 6 has an eighth oblong hole 44 corresponding to the position of the card shaft 41. Moving the sliding sleeve 10 upward causes the push rod 11 to move the card sleeves 39 upward, thereby disengaging the card shafts from the slots and unlocking the device; conversely, moving it downward locks the device. When the wide-body folding trolley is unfolded and locked, the upper card sleeve 39 is located inside the upper card seat 37, and the lower card sleeve 39 is located inside the lower card seat 37; when the wide-body folding trolley is folded and locked, the upper card sleeve 39 is located inside the lower card seat 37, and the lower card sleeve is not locked to any card seat 37.

[0057] The wide-body folding trolley provided in Example 4 has all the advantages of the wide-body folding trolley in Example 1, which will not be repeated here.

[0058] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A wide-body folding handcart, characterized in that, The vehicle includes a frame body and a cockpit body. The frame body includes a front bracket (1), a rear bracket (2), and a push handle bracket (6). The middle sections of the front bracket (1) and the rear bracket (2) intersect and are rotatably fixed to each other. The push handle bracket (6) is slidably connected to the front bracket (1). The cockpit body includes a cockpit bracket (20) and a cockpit cover (21). The lower front end of the cockpit bracket (20) is hinged to the upper front end of the rear bracket (2). The upper rear end is hinged to the push handle bracket (6), the width of the cockpit bracket (20) is greater than the width of the frame body, and the cockpit sleeve (21) is fixedly fitted onto the cockpit bracket (20); the front bracket (1) and the rear bracket (2) are hinged and fixed through the first pivot (5), the cockpit bracket (20) and the rear bracket (2) are hinged and fixed through the second pivot (8), and the cockpit bracket (20) and the push handle bracket (6) are hinged and fixed through the third pivot (9); The frame body also includes a sliding locking assembly. The control end of the sliding locking assembly is located on the push handle bracket (6). The locking end of the sliding locking assembly acts on the front bracket (1) and the push handle bracket (6) to lock or unlock the fixed relationship between the front bracket (1) and the push handle bracket (6). The sliding locking assembly includes a sliding sleeve (10), a push rod (11), a locking sleeve (12), and a locking plate (13). The sliding sleeve (10) is slidably sleeved on the outside of the push handle bracket (6). The push rod (11), the locking sleeve (12), and the locking plate (13) are all located inside the push handle bracket (6). One end of the push rod (11) is connected to the sliding sleeve (10), and the other end of the push rod (11) is connected to the sliding sleeve (10). The locking sleeve (12) is connected, and the locking sleeve (12) can move along the axial direction of the push rod (11) under the drive of the push rod (11). The locking plate (13) has a protruding locking tongue (32) on one side. The push handle bracket (6) has a window corresponding to the position of the locking tongue (32). The locking plate (13) is connected to the locking sleeve (12) and moves along the radial direction of the push handle bracket (6) under the drive of the locking sleeve (12). The front bracket (1) has a first slot (33) and a second slot. When the wide-body folding trolley is unfolded, the first slot (33) corresponds to the position of the window. When the wide-body folding trolley is folded, the second slot corresponds to the position of the window. The push handle bracket (6) has a first waist-shaped hole (23) at the position where the sliding sleeve (10) is fitted. The length direction of the first waist-shaped hole (23) is arranged along the axial direction of the push handle bracket (6). The sliding sleeve (10) has a first pin hole (22). A fourth rotating shaft (14) passes through the first pin hole (22). The fourth rotating shaft (14) can slide along the first waist-shaped hole (23). One end of the push rod (11) is hinged to the middle section of the fourth rotating shaft (14). The other end of the push rod (11) is connected to the fifth rotating shaft. The shaft (15) is connected to one end of the locking sleeve (12). The locking sleeve (12) has a second oblong hole (24) and a third oblong hole (25) near both ends. The length of both the second oblong hole (24) and the third oblong hole (25) is along the axial direction of the push handle bracket (6). A second pin hole (26) is provided between the second oblong hole (24) and the third oblong hole (25). The push handle bracket (6) has a third pin hole (27) corresponding to the position of the second oblong hole (24). A fourth pin hole (28) is provided at the position of hole (25). A fourth waist-shaped hole (29) is provided at the position corresponding to the second waist-shaped hole (24) of the locking plate (13). A fifth waist-shaped hole (30) is provided at the position corresponding to the third waist-shaped hole (25). The length direction of the fourth waist-shaped hole (29) and the fifth waist-shaped hole (30) is arranged along the radial direction of the push handle bracket (6). A sixth waist-shaped hole (31) is provided at the position corresponding to the second pin hole (26). The length direction of the sixth waist-shaped hole (31) is parallel to that of the push handle bracket (6). The radial direction forms an angle of less than 90°. The sixth rotating shaft (16) is inserted through the third pin hole (27) and the sixth rotating shaft (16) is inserted through the second waist-shaped hole (24) and the fourth waist-shaped hole (29). The seventh rotating shaft (17) is inserted through the fourth pin hole (28) and the seventh rotating shaft (17) is inserted through the third waist-shaped hole (25) and the fifth waist-shaped hole (30). The eighth rotating shaft (18) is inserted through the second pin hole (26) and the eighth rotating shaft (18) is inserted through the sixth waist-shaped hole (31). The middle section of the push rod (11) is provided with a seventh waist-shaped hole (34), and the push handle bracket (6) is provided with a fifth pin hole (35) at the position corresponding to the seventh waist-shaped hole (34). A ninth rotating shaft (19) is passed through the fifth pin hole (35) and the ninth rotating shaft (19) is passed through the seventh waist-shaped hole (34).

2. The wide-body folding handcart according to claim 1, characterized in that, The wide-body folding trolley also includes a front combination wheel (3) and a rear combination wheel (4). The front combination wheel (3) is installed at the lower front end of the front support (1), and the rear combination wheel (4) is installed at the lower rear end of the rear support (2).

3. The wide-body folding handcart according to claim 1 or 2, characterized in that, The lower front section of the push handle bracket (6) is slidably inserted into the upper rear section of the front bracket (1).

4. The wide-body folding handcart according to claim 1 or 2, characterized in that, Two sliding fixing sleeves (7) are fixed on the outer side of the upper rear section of the front bracket (1). The sleeve hole of the sliding fixing sleeve (7) is located above the front bracket (1). The lower front section of the push handle bracket (6) is slidably inserted into the sleeve hole of the sliding fixing sleeve (7).

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