A folding stroller

Abstract

The utility model relates to the field of trolley technology, especially a folding trolley, which comprises a carriage, a first hinged seat connected to the bottom of the carriage, a second hinged seat located below the carriage, and a roller wheel installed on the second hinged seat; the first hinged seat and the second hinged seat are hinged to each other, and the second hinged seat can rotate around the first hinged seat to make the roller wheel and the carriage in a folded or unfolded state; when the folding trolley is stored, the second hinged seat is rotated around the first hinged seat to the bottom of the carriage until the roller wheel and the carriage are in a folded state, thereby achieving the folding storage of the roller wheel and effectively reducing the overall size of the folding trolley; when the folding trolley is used, the second hinged seat is rotated around the first hinged seat to the outside of the carriage until the roller wheel and the carriage are in an unfolded state, and the rotation of the second hinged seat around the first hinged seat is limited by a latch, thereby avoiding the bending of the first hinged seat and the second hinged seat during the use of the trolley.

Description

Technical Field

[0001] This utility model relates to the field of trolley technology, and in particular to a folding trolley. Background Technology

[0002] With the development of science and technology and the progress of society, people's daily lives have become increasingly rich, and trolleys have become widely popular. A simple trolley usually consists of a trolley body and wheels. The trolley body is a carrying frame with a certain amount of space. When using it, people can first place the object to be moved in the carrying frame, and then push the trolley to the designated location. Compared with manual carrying, trolleys can carry a large amount of weight each time and save time and effort. However, because trolleys are often large, they are inconvenient to carry and not conducive to people moving the trolley itself.

[0003] Therefore, there are many folding strollers on the market. Traditional folding strollers can be folded to reduce their size. However, the wheels of traditional strollers are usually fixed to the body. Even when not in use, the wheels will extend outwards, resulting in a large overall size of the stroller, which takes up a lot of storage space and is not very convenient. Utility Model Content

[0004] The purpose of this utility model is to provide a folding trolley, which addresses the problem that the wheels of traditional trolleys in the background art are usually fixedly connected to the body, and the wheels will extend outward even when not in use, resulting in a large overall size of the trolley, occupying a lot of storage space and having poor convenience.

[0005] This utility model provides a folding trolley, including a carriage, a first hinge seat connected to the bottom of the carriage, a second hinge seat located below the carriage, and rollers mounted on the second hinge seat;

[0006] The first hinge seat and the second hinge seat are hinged to each other, and the second hinge seat can rotate around the first hinge seat to make the roller and the carriage be in a folded or unfolded state;

[0007] It also includes a latch, wherein the second hinge seat is configured such that, when the roller and the carriage are in the deployed state, the latch restricts the second hinge seat from rotating about the first hinge seat.

[0008] When folding the trolley, rotating the second hinge seat causes it to rotate around the first hinge seat downwards until the wheels and the trolley are folded, thus folding the wheels and effectively reducing the overall size of the trolley. This solves the problem of large storage space and inconvenience caused by the fixed connection between the wheels and the body of traditional trolleys. Furthermore, when using the folding trolley, rotating the second hinge seat causes it to rotate around the first hinge seat outwards until the wheels and the trolley are unfolded. A pin then secures the first and second hinge seats in the unfolded state, restricting the second hinge seat from rotating around the first hinge seat and preventing bending of the first and second hinge seats during use. This ensures structural stability when pushing the trolley and carrying items, solving the problem of insufficient stability after the wheels are unfolded.

[0009] Preferably, the first hinge seat includes a U-shaped plate, the top surface of which is connected to the bottom of the carriage;

[0010] The second hinged seat includes a base and a clamping plate connected to each other. The base is located inside the U-shaped plate and is hinged to the side of the U-shaped plate. The roller is installed inside the clamping plate.

[0011] Preferably, the U-shaped panel includes a top panel and side panels connected to both ends of the top panel, and the top panel is detachably connected to the carriage.

[0012] The base includes a flat plate and hinge plates connected to both ends of the flat plate, the hinge plates being located inside the side panel;

[0013] It also includes a first pivot that passes through the side panel and the hinge plate, so that the hinge plate can rotate relative to the side panel about the first pivot.

[0014] Preferably, the side panel is provided with a first pin hole, the hinge plate is provided with a second pin hole, and one end of the pin passes through the first pin hole and the second pin hole.

[0015] Preferably, the carriage includes a frame on which a floor plate is mounted;

[0016] It also includes four side plates arranged around the base plate, the side plates being a front side plate, a left side plate, a rear side plate, and a right side plate in sequence, and the front side plate, the left side plate, the rear side plate, and the right side plate are all hinged to the top of the frame;

[0017] The first hinge is connected to the bottom of the frame.

[0018] Preferably, height-increasing rods are provided at both the front and rear ends of the frame, and the front side plate and the rear side plate are respectively hinged to the height-increasing rods at the front and rear ends of the frame;

[0019] The left side plate and the right side plate are hinged to the left and right sides of the frame.

[0020] Preferably, the front side panel and the left side panel, the left side panel and the rear side panel, the rear side panel and the right side panel, and the right side panel and the front side panel are all detachably connected by a pin structure.

[0021] Preferably, the pin structure includes a sleeve, a fixing plate, and a rod. The sleeve and the fixing plate are respectively disposed on two adjacent side plates. When the two adjacent side plates are combined, the sleeve is located above the fixing plate. One end of the rod abuts against the sleeve, and the other end of the rod passes through the sleeve and through the fixing plate.

[0022] Preferably, it also includes a push rod hinged to the rear end of the frame;

[0023] The frame is also provided with a middle rod, which is arranged along the central axis of the frame, and a buckle is provided on the side of the middle rod away from the bottom plate;

[0024] The push rod can rotate around the frame until it is engaged in the buckle.

[0025] Preferably, it further includes a spring support rod, one end of which is hinged to the second hinge seat;

[0026] The other end of the spring support rod is used to hinge to the bottom of the carriage.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] The folding trolley of this application has a first hinge seat installed at the bottom of the carriage. The first hinge seat and a second hinge seat are hinged together. The rollers are installed on the second hinge seat. When folding the trolley, by rotating the second hinge seat, the second hinge seat rotates around the first hinge seat downwards until the rollers and carriage are in a folded state, thereby realizing the folding and storage of the rollers. This effectively reduces the overall size of the folding trolley and solves the problem of large storage space and inconvenience of carrying caused by the fixed connection between the rollers and the carriage body of traditional trolleys. Furthermore, when using the folding trolley, by rotating the second hinge seat, the second hinge seat rotates around the first hinge seat outwards until the rollers and carriage are in an unfolded state. The first and second hinge seats are fixed in the unfolded state by a pin to restrict the rotation of the second hinge seat around the first hinge seat, preventing the first and second hinge seats from bending during the use of the trolley. This ensures the structural stability of the trolley when pushed and carrying items, and solves the problem of insufficient stability after the rollers are unfolded. Attached Figure Description

[0029] Figure 1 This is a schematic diagram illustrating the unfolding and use of the folding trolley described in this application.

[0030] Figure 2 This is a schematic diagram of the folding and storage of the folding stroller described in this application.

[0031] Figure 3 This is a schematic diagram of the bottom of the folding trolley of this application (the push rod is stored at the bottom of the trolley).

[0032] Figure 4 This is a schematic diagram of the carriage structure. Figure 1 (Looking down).

[0033] Figure 5 This is a schematic diagram of the carriage structure. Figure 2 (Side view).

[0034] Figure 6 yes Figure 4 A magnified view of part A.

[0035] Figure 7 This is a schematic diagram of the carriage structure. Figure 3 (Left and rear panels omitted).

[0036] Figure 8 This is a schematic diagram of the roller layout.

[0037] Figure 9 This is a schematic diagram showing the fit between the first hinge seat, the second hinge seat, and the roller.

[0038] Figure 10 This is a schematic diagram of the second hinged seat structure.

[0039] Figure 11 This is a schematic diagram of the first hinged seat structure.

[0040] Figure 12 This is a schematic diagram showing the position of the support rod.

[0041] Figure 13 This is a schematic diagram showing the connection between the support rod and the second hinge seat.

[0042] Figure 14 This is a schematic diagram of the pin structure.

[0043] Marked in the image:

[0044] 1-Carriage,

[0045] 11-Front side panel, 12-Left side panel, 13-Rear side panel, 14-Right side panel, 15-Bottom panel, 16-Frame, 17-Center rod, 18-Hinge

[0046] 2-First hinge seat,

[0047] 21-U-shaped plate, 211-top panel, 212-side panel, 2121-first pin hole, 2122-first pivot hole, 22-reinforcing plate.

[0048] 3-Second hinge seat,

[0049] 31-Base, 311-Flat plate, 312-Hinge plate, 3121-Second pin hole, 3122-Second pivot hole, 3123-Second support hole, 32-Clamping plate.

[0050] 4-rollers,

[0051] 5-Pin, 51-Pin shaft, 511-Step portion, 52-First spring, 53-Handle, 54-Sleeve

[0052] 6-First pivot,

[0053] 7-Heightening bar,

[0054] 8-Pin structure,

[0055] 81-Sleeve, 82-Fixing plate, 83-Insertion rod

[0056] 9-Pusher

[0057] 10-Snap fastener,

[0058] 20-Pull ring,

[0059] 30-Spring support rod,

[0060] 40 - Mounting plate. Detailed Implementation

[0061] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0062] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0063] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are set as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," "parallel," or "coaxial" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0064] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0065] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0066] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0067] Example 1

[0068] like Figures 1-2 As shown, this embodiment discloses a folding trolley, including a carriage 1, a first hinge seat 2 connected to the bottom of the carriage 1, a second hinge seat 3 located below the carriage 1, and rollers 4 mounted on the second hinge seat 3.

[0069] The first hinge seat 2 and the second hinge seat 3 are hinged to each other, and the second hinge seat 3 can rotate around the first hinge seat 2 so that the roller 4 and the carriage 1 are in a folded or unfolded state.

[0070] It also includes a pin 5, and the second hinge seat 3 is configured such that when the roller 4 and the carriage 1 are in the unfolded state, the pin 5 is used to restrict the second hinge seat 3 from rotating about the first hinge seat 2.

[0071] In this embodiment of the folding trolley, a first hinge seat 2 is installed at the bottom of the carriage 1. The first hinge seat 2 and a second hinge seat 3 are hinged together. A roller 4 is mounted on the second hinge seat 3. When folding the trolley for storage, the second hinge seat 3 is rotated, causing it to rotate around the first hinge seat 2 downwards until the roller 4 and carriage 1 are folded. This achieves the folding and storage of the roller 4, effectively reducing the overall size of the folding trolley and solving the problems of large storage space and inconvenience in carrying caused by the fixed connection between the rollers and the carriage body of traditional trolleys. In one step, when using the folding trolley, by rotating the second hinge seat 3, the second hinge seat 3 rotates around the first hinge seat 2 towards the outside of the carriage 1 until the roller 4 and the carriage 1 are in the unfolded state. The first hinge seat 2 and the second hinge seat 3 in the unfolded state are fixed by the pin 5 to restrict the rotation of the second hinge seat 3 around the first hinge seat 2, and to prevent the first hinge seat 2 and the second hinge seat 3 from bending during the use of the trolley. This ensures the structural stability of the trolley when it is pushed and carries items, and solves the problem of insufficient stability after the roller 4 is unfolded.

[0072] In this application, as Figure 2 As shown, the folded state of roller 4 and carriage 1 means that roller 4 is placed horizontally and roller 4 is parallel to the bottom surface of carriage 1.

[0073] like Figure 3 As shown, the folded state of the roller 4 and the carriage 1 refers to the roller 4 being placed vertically, with the roller 4 perpendicular to the bottom surface of the carriage 1.

[0074] In one or more embodiments, such as Figure 8 , Figure 9 As shown, the first hinge seat 2 includes a U-shaped plate 21, the top surface of which is connected to the bottom of the carriage 1;

[0075] The second hinge seat 3 includes a base 31 and a clamping plate 32 connected to each other. The base 31 is located inside the U-shaped plate 21 and is hinged to the side of the U-shaped plate 21. The roller 4 is installed inside the clamping plate 32.

[0076] The first hinge seat 2 includes a U-shaped plate 21, the top surface of which is connected to the bottom surface of the carriage 1, thereby fixing the first hinge seat 2 to the carriage 1;

[0077] The U-shaped plate 21 is used to accommodate the base 31 of the second hinge seat 3. The base 31 is hinged to the side of the U-shaped plate 21, thereby realizing the hinge between the second hinge seat 3 and the first hinge seat 2.

[0078] Furthermore, the roller 4 is installed inside the clamping plate 32, which is connected to the side of the base 31 away from the U-shaped plate 21, as shown below. Figure 9 ;

[0079] When folding the roller 4, the base 31 is rotated, which drives the roller 4 to rotate on the U-shaped plate 21, so that the roller 4 rotates from a vertical state to a horizontal state, thereby realizing the folding of the roller 4.

[0080] Specifically, a wheel axle is installed inside the clamp 32, and a roller 4 is installed on the wheel axle.

[0081] Specifically, such as Figure 9 As shown, the first hinge seat 2 also includes a reinforcing plate 22, which is connected to the U-shaped plate 21. The U-shaped plate 21 is connected to the bottom surface of the carriage 1, and the reinforcing plate 22 is connected to the side of the carriage 1 to further reinforce the U-shaped plate 21 and ensure the stability of the connection between the U-shaped plate 21 and the carriage 1.

[0082] In optional implementations, such as Figure 9 As shown, the U-shaped panel 21 includes a top panel 211 and side panels 212 connected to both ends of the top panel 211. The top panel 211 is detachably connected to the carriage 1.

[0083] The base 31 includes a flat plate 311 and a hinge plate 312 connected to both ends of the flat plate 311. The hinge plate 312 is located inside the side panel 212.

[0084] It also includes a first pivot 6, which passes through the side panel 212 and the hinge plate 312, so that the hinge plate 312 can rotate relative to the side panel 212 about the first pivot 6.

[0085] When folding the roller 4, the base 31 is rotated, and the base 31 rotates around the first pivot 6, thereby driving the roller 4 to rotate, so that the roller 4 rotates from a vertical state to a horizontal state, thus realizing the folding of the roller 4.

[0086] Specifically, such as Figure 9 As shown, the first pivot 6 passes through the two side panels 212 and the two hinge plates 312, and both ends of the first pivot 6 extend to the outside of the side panels 212 of the U-shaped plate 21. Nuts are installed on both ends of the first pivot 6 to prevent the first pivot 6 from falling off the U-shaped plate 21.

[0087] Furthermore, such as Figure 11 As shown, the side panel 212 is provided with a first pivot hole 2122, which is located outside the first pin hole 2121.

[0088] like Figure 11 As shown, the hinge plate 312 is provided with a second pivot hole 3122, which is located outside the second pin hole 3121;

[0089] The first pivot 6 passes through the first pivot hole 2122 and the second pivot hole 3122, and is thus mounted on the side panel 212 and the hinge plate 312.

[0090] Furthermore, such as Figure 11 As shown, the side panel 212 is provided with a first pin hole 2121;

[0091] like Figure 10 As shown, the hinge plate 312 is provided with a second pin hole 3121, and one end of the pin 5 passes through the first pin hole 2121 and the second pin hole 3121.

[0092] The U-shaped plate 21 and the base 31 are limited by the pin 5 passing through the side panel 212 and the hinge plate 312. When the roller 4 is unfolded, the first hinge seat 2 and the second hinge seat 3 are fixed to prevent the first hinge seat 2 and the second hinge seat 3 from bending due to uneven road surface or uneven force during the use of the trolley, thus ensuring the structural stability of the trolley when it is pushed and carries items.

[0093] Furthermore, such as Figure 9 , Figure 14 As shown, the pin 5 includes a pin 51, a first spring 52, a handle 53 and a sleeve 54. The pin 51 passes through the sleeve 54 and can move along the length of the sleeve 54.

[0094] The sleeve 54 is also provided with a groove inside, with the groove surface facing the first pin hole 2121 of the side panel 212. Specifically, the end of the sleeve 54 with the groove is welded to the side panel 212, and the groove covers the first pin hole 2121.

[0095] The pin 51 has a stepped portion 511 at one end near the side panel 212. The first spring 52 is sleeved on the pin 51, with one end of the first spring 52 abutting against the stepped portion 511 and the other end of the first spring 52 abutting against the bottom surface of the groove of the sleeve 54. The end of the pin 51 that passes through the sleeve 54 is connected to the handle 53.

[0096] Under the elastic force of the first spring 52, such as Figure 14 As shown, the first spring 52 pushes the stepped portion 511 of the pin 51, so that the pin 51 is not easy to fall out after it passes through the first pin hole 2121 and the second pin hole 3121. Then, the pin 51 passes through the side panel 212 and the hinge plate 312 to limit the U-shaped plate 21 and the base 31.

[0097] When the roller 4 needs to be folded, the handle 53 is pulled outward to move the pin 51 outward, thereby disengaging the pin 51 from the first pin hole 2121 and the second pin hole 3121, so that the U-shaped plate 21 and the base 31 can rotate, so that the second hinge seat can rotate around the first hinge seat towards the bottom of the carriage until the roller and the carriage are in a folded state, thus realizing the folding and storage of the roller.

[0098] In one or more embodiments, such as Figure 4 As shown, the carriage 1 includes a frame 16, on which a floor plate 15 is installed;

[0099] It also includes side plates arranged around the base plate 15, the side plates being front side plate 11, left side plate 12, rear side plate 13 and right side plate 14 in sequence, and the front side plate 11, left side plate 12, rear side plate 13 and right side plate 14 are all hinged to the top of the frame 16.

[0100] The first hinge 2 is connected to the bottom of the frame 16.

[0101] Since the side panels are all hinged to the top of the frame 16, when the trolley is not in use, the side panels can be rotated to overlap each other on the frame 16, thus folding and retracting the carriage 1. Figure 2 ;

[0102] When the trolley is needed, the side panels are erected so that the four side panels and the bottom panel 15 form the carriage 1 to accommodate goods, such as... Figure 1 .

[0103] In optional implementations, such as Figure 8 , Figure 13As shown, the U-shaped plate 21 is connected to the bottom surface of the frame 16, and the reinforcing plate 22 is connected to the side surface of the frame 16.

[0104] Furthermore, such as Figure 7 As shown, height-increasing rods 7 are provided at both the front and rear ends of the frame 16, and the front side plate 11 and the rear side plate 13 are respectively hinged to the height-increasing rods 7 at the front and rear ends of the frame 16.

[0105] The left side plate 12 and the right side plate 14 are hinged to the left and right sides of the frame 16.

[0106] By setting heightening rods 7 at both the front and rear ends of the frame 16, and hinged the front side plate 11 and the rear side plate 13 to the heightening rods 7 at the front and rear ends of the frame 16 respectively, while the left side plate 12 and the right side plate 14 are hinged to the left and right sides of the frame 16.

[0107] The height of the hinge points of the front and rear side panels is increased by the heightening rods 7 at the front and rear ends of the frame 16, so that the hinge points of the front side panel 11 and the rear side panel 13 are higher than the hinge points of the left side panel 12 and the right side panel 14, so that the front side panel 11 and the rear side panel 13 can overlap with the left side panel 12 and the right side panel 14.

[0108] Specifically, when folding the carriage 1, the left side panel 12 and the right side panel 14 are rotated first, so that the left side panel 12 and the right side panel 14 abut against the frame 16.

[0109] Then rotate the front side panel 11 and the rear side panel 13 so that the front side panel 11 and the rear side panel 13 abut against the left side panel 12 and the right side panel 14, thereby realizing the folding of the carriage 1, as shown. Figure 2 .

[0110] Among them, such as Figure 7 As shown, the left side panel 12 and the right side panel 14 are hinged to the left and right sides of the frame 16 via hinges 18, and the front side panel 11 and the rear side panel 13 are hinged to the height-increasing rods 7 at the front and rear ends of the frame 16 via hinges 18.

[0111] In one or more implementations, such as Figure 4 As shown, the front side panel 11 and the left side panel 12, the left side panel 12 and the rear side panel 13, the rear side panel 13 and the right side panel 14, and the right side panel 14 and the front side panel 11 are all detachably connected by a pin structure 8.

[0112] In a detachable manner, several side panels are connected together when the carriage 1 is in use, so as to carry goods;

[0113] When carriage 1 is not in use, several side panels are removed, and then the side panels are rotated to fold carriage 1.

[0114] Specifically, such as Figure 6As shown, the pin structure 8 includes a sleeve 81, a fixing plate 82, and a pin 83. The sleeve 81 and the fixing plate 82 are respectively disposed on two adjacent side plates. When the two adjacent side plates are combined, the sleeve 81 is located above the fixing plate 82. One end of the pin 83 abuts against the sleeve 81, and the other end of the pin 83 passes through the sleeve 81 and through the fixing plate 82.

[0115] The combination and separation of adjacent side plates can be achieved through the cooperation of sleeve 81, fixing plate 82 and insertion rod 83;

[0116] Furthermore, one end of the insert rod 83 passes through the sleeve 81 and through the fixing plate 82. Its insert design is simple to operate and facilitates the quick fixing or disassembly of adjacent side plates, thus improving operational efficiency.

[0117] In optional implementations, such as Figure 1 , Figure 3 As shown, it also includes a push rod 9, which is hinged to the rear end of the frame 16;

[0118] like Figure 5 As shown, a middle rod 17 is also provided inside the frame 16. The middle rod 17 is arranged along the central axis of the frame 16, and a buckle 10 is provided on the side of the middle rod 17 away from the bottom plate 15.

[0119] The push rod 9 can rotate around its hinge until it is engaged in the latch 10.

[0120] The push rod 9 is hinged to the frame 16. When using the trolley, the push rod 9 is rotated outward to the upper part of the carriage 1, and the personnel push the trolley forward by pushing the push rod 9.

[0121] When the trolley is not in use, the push rod 9 is rotated inward to rotate it to the bottom of the carriage 1 and then engaged in the buckle 10 of the middle rod 17, thereby fixing the push rod 9 to the bottom of the carriage 1.

[0122] The push rod 9 is hinged to the rear end of the frame 16 and can be rotated and snapped into the buckle 10, which realizes the storage of the push rod 9 and avoids the push rod 9 protruding and taking up extra space.

[0123] In optional implementations, such as Figure 4 As shown, it also includes pull rings 20, which are located on the front and rear ends of the frame 16. After the trolley is folded, it can be pulled by the pull rings 20, which is suitable for scenarios such as going up and down stairs and moving to vehicles, so as to facilitate the transfer of the trolley and improve its portability.

[0124] Example 2

[0125] like Figure 11 As shown, based on Embodiment 1, the folding trolley of this embodiment also includes a spring support rod 30, one end of which is used to be hinged to the second hinge seat 3.

[0126] The other end of the spring support rod 30 is used to hinge to the bottom of the carriage 1.

[0127] When the roller 4 is in the unfolded state between the carriage 1 and the carriage 4, the second hinge seat 3 is supported by the spring support rod 30, which provides support force for the second hinge seat 3 and effectively prevents the second hinge seat 3 from bending, thereby enhancing the structural stability of the trolley.

[0128] Specifically, such as Figure 13 As shown, the hinge point between the spring support rod 30 and the second hinge seat 3 is located inside the pin 5.

[0129] The intermediate rod 17 is provided with a mounting plate 40, one end of the spring support rod 30 is hinged to the mounting plate 40, and the other end of the spring support rod 30 is hinged to the base 31 of the second hinge seat 3.

[0130] Furthermore, the hinge point of the spring support rod 30 is located inside the pin 5;

[0131] like Figure 10 As shown, the base 31 has a hinge plate 312, and the hinge plate 312 is provided with a second support hole 3123. One end of the spring support rod 30 is hinged to the second support hole 3123. The second support hole 3123 is located inside the second pin hole 3121, and the second pivot hole 3122 is located outside the second pin hole 3121.

[0132] like Figure 13 As shown, when the roller 4 and the carriage 1 are in the unfolded state, the hinge point between the spring support rod 30 and the second hinge seat 3 is the first hinge point.

[0133] When the roller 4 and the carriage 1 are in a folded state, the hinge point between the spring support rod 30 and the second hinge seat 3 is the second hinge point;

[0134] The hinge point between the spring support rod 30 and the bottom of the carriage 1 is the third hinge point. When the roller 4 and the carriage 1 are in a folded or unfolded state, the position of the third hinge point remains unchanged.

[0135] Furthermore, the third hinge point is located above the first hinge point and below the second hinge point.

[0136] When the roller 4 and the carriage 1 are in the unfolded state, since the third hinge point is located above the first hinge point, the spring support rod 30 tilts downward to support the second hinge seat 3, effectively preventing the second hinge seat 3 from bending.

[0137] When the roller 4 and the carriage 1 are in a folded state, since the third hinge point is located below the second hinge point, the spring support rod 30 tilts upward to support the second hinge seat 3, effectively preventing the second hinge seat 3 from loosening and preventing the roller 4 from accidentally opening in the folded state.

[0138] Among them, the spring support rod 30 is a telescopic rod with an internal spring, which can be compressed and can return to its original length under the action of the spring.

[0139] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A folding trolley, characterized in that, Includes a carriage (1), a first hinge seat (2) connected to the bottom of the carriage (1), a second hinge seat (3) located below the carriage (1), and a roller (4) mounted on the second hinge seat (3); The first hinge seat (2) and the second hinge seat (3) are hinged to each other. The second hinge seat (3) can rotate around the first hinge seat (2) so that the roller (4) and the carriage (1) are in a folded or unfolded state. It also includes a pin (5), the second hinge seat (3) being configured such that when the roller (4) and the carriage (1) are in the unfolded state, the pin (5) is used to restrict the second hinge seat (3) from rotating about the first hinge seat (2).

2. A folding trolley according to claim 1, characterized in that, The first hinge seat (2) includes a U-shaped plate (21), the top surface of which is connected to the bottom of the carriage (1); The second hinge seat (3) includes a base (31) and a clamping plate (32) connected to each other. The base (31) is located inside the U-shaped plate (21) and is hinged to the side of the U-shaped plate (21). The roller (4) is installed inside the clamping plate (32).

3. A folding trolley according to claim 2, characterized in that, The U-shaped panel (21) includes a top panel (211) and side panels (212) connected to both ends of the top panel (211). The top panel (211) is detachably connected to the carriage (1). The base (31) includes a flat plate (311) and a hinge plate (312) connected to both ends of the flat plate (311), the hinge plate (312) being located inside the side panel (212); It also includes a first pivot (6) that passes through the side panel (212) and the hinge plate (312) so that the hinge plate (312) can rotate relative to the side panel (212) about the first pivot (6).

4. A folding trolley according to claim 3, characterized in that, The side panel (212) is provided with a first pin hole (2121), and the hinge plate (312) is provided with a second pin hole (3121). One end of the pin (5) passes through the first pin hole (2121) and the second pin hole (3121).

5. A folding trolley according to claim 1, characterized in that, The carriage (1) includes a frame (16) on which a floor plate (15) is mounted. It also includes four side plates arranged around the base plate (15) in a circumferential direction. The side plates are, in order, a front side plate (11), a left side plate (12), a rear side plate (13) and a right side plate (14). The front side plate (11), the left side plate (12), the rear side plate (13) and the right side plate (14) are all hinged to the top of the frame (16). The first hinge (2) is connected to the bottom of the frame (16).

6. A folding trolley according to claim 5, characterized in that, The frame (16) is provided with height-increasing rods (7) at both the front and rear ends. The front side plate (11) and the rear side plate (13) are respectively hinged to the height-increasing rods (7) at the front and rear ends of the frame (16). The left side plate (12) and the right side plate (14) are hinged to the left and right sides of the frame (16).

7. A folding trolley according to claim 6, characterized in that, The front side panel (11) and the left side panel (12), the left side panel (12) and the rear side panel (13), the rear side panel (13) and the right side panel (14), and the right side panel (14) and the front side panel (11) are all detachably connected by a pin structure (8).

8. A folding trolley according to claim 7, characterized in that, The pin structure (8) includes a sleeve (81), a fixing plate (82), and a plug (83). The sleeve (81) and the fixing plate (82) are respectively disposed on two adjacent side plates. When the two adjacent side plates are combined, the sleeve (81) is located above the fixing plate (82). One end of the plug (83) abuts against the sleeve (81), and the other end of the plug (83) passes through the sleeve (81) and through the fixing plate (82).

9. A folding trolley according to claim 5, characterized in that, It also includes a push rod (9) hinged to the rear end of the frame (16); The frame (16) is also provided with a middle rod (17), which is arranged along the central axis of the frame (16). The middle rod (17) is provided with a buckle (10) on the side away from the bottom plate (15). The push rod (9) can rotate around the frame (16) until it is engaged in the buckle (10).

10. A folding trolley according to any one of claims 1-9, characterized in that, It also includes a spring support rod (30), one end of which is hinged to the second hinge seat (3); The other end of the spring support rod (30) is used to hinge to the bottom of the carriage (1).

Images