A folding stroller
By designing the front and rear support components in the folding trolley to form a triangular structure, the force is evenly distributed, solving the problem of excessive force on the limiting components, improving the product's stability and load-bearing capacity, and making it easy to fold and store.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-09-29
- Publication Date
- 2026-07-14
AI Technical Summary
Existing folding trolleys have excessive stress on their limiting components, which can easily cause deformation or damage, affecting their service life and posing safety risks.
A folding trolley was designed. When unfolded, the front and rear support components form a triangular structure, which evenly distributes the force, reduces the pivot pressure between the front and rear bottom rods, and improves the structural stability by optimizing the force path through locking components and support rods.
This design achieves uniform stress distribution, structural stability, reduced risk of deformation, increased load-bearing capacity, and ease of folding and storage.
Smart Images
Figure CN224491186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of trolley technology, and in particular to a folding trolley. Background Technology
[0002] Strollers are frequently used for outdoor recreation, especially when taking infants and toddlers outdoors. Strollers not only allow infants and toddlers to sit or lie down, making it convenient to take them around, but they can also carry outdoor supplies, making them a convenient and effortless means of transportation.
[0003] Currently, folding strollers are highly favored by consumers due to their foldability, portability, and ease of storage. Existing folding strollers typically include a front frame, a rear frame, and foldable side frames. The side frames generally have a front top rod, a front bottom rod, a rear top rod, and a rear bottom rod. The front and rear top rods, and the front and rear bottom rods, are usually connected by pivots. Since folding strollers typically need to bear weight, most of the force is concentrated on the limiting components between the front and rear bottom rods, with only a portion of the force transferred to the front and rear frames. The limiting components experience significant stress, making them prone to deformation or damage. This not only affects the product's lifespan but also poses risks to the user's life and property.
[0004] Therefore, this utility model provides a folding trolley that can effectively solve the above problems. It has a simple structure, uniform force distribution, and stable structure. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a folding trolley with simple structure, uniform stress distribution, and stable structure.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A folding trolley, having a folded state and an unfolded state, includes:
[0008] A front frame assembly, a rear frame assembly, and a side frame assembly for unfolding and folding disposed between the front frame assembly and the rear frame assembly, wherein the side frame assembly includes:
[0009] A front top rod, a front bottom rod, a rear top rod, and a rear bottom rod, wherein the front end of the front top rod and the front end of the front bottom rod are respectively hinged to the upper and lower sides of the front frame assembly, the rear end of the rear top rod and the rear end of the rear bottom rod are respectively hinged to the upper and lower sides of the rear frame assembly, and the rear end of the front bottom rod is hinged to the front end of the rear bottom rod;
[0010] A locking assembly, the two ends of which are respectively hinged to the rear end of the front push rod and the front end of the rear push rod, and locks or releases the front push rod and the rear push rod;
[0011] A front support assembly, the lower end of which is hinged to the front bottom rod, and the upper end of which is connected to the front frame assembly and slides between an unfolded position and a folded position;
[0012] The rear support assembly has its lower end hinged to the rear bottom rod and its upper end connected to the rear frame assembly, and can slide between the unfolded position and the folded position.
[0013] As an improvement of this utility model, the front support assembly includes a front support diagonal rod and a front sliding block. The lower end of the front support diagonal rod is hinged to the front bottom rod, and the upper end of the front support diagonal rod is hinged to the front sliding block. The front sliding block is connected to the front frame assembly and slides between the unfolded position and the folded position. The rear support assembly includes a rear support diagonal rod and a rear sliding block. The lower end of the rear support diagonal rod is hinged to the rear bottom rod, and the upper end of the rear support diagonal rod is hinged to the rear sliding block. The rear sliding block is connected to the rear frame assembly and slides between the unfolded position and the folded position.
[0014] As an improvement of this utility model, the front frame assembly is provided with a front limiting block and the rear frame assembly is provided with a rear limiting block. When the folding trolley is in the unfolded state, the lower end of the front sliding block abuts against the front limiting block and the lower end of the rear sliding block abuts against the rear limiting block.
[0015] As an improvement of this utility model, the side frame assembly further includes a front support rod and a rear support rod. The upper end of the front support rod is rotatably connected to the front end of the locking assembly, and the lower end of the front support rod is rotatably connected to the front bottom rod. The upper end of the rear support rod is rotatably connected to the rear end of the locking assembly, and the lower end of the rear support rod is rotatably connected to the rear bottom rod.
[0016] As an improvement of this utility model, the locking assembly includes a locking housing, a pressing housing, two locking members and a reset member. The locking members are movably connected to the locking housing, and the pressing housing is connected to the locking housing and slides between a first position and a second position to drive the locking members to move between a locked position and an unlocked position. The reset member is disposed between the locking housing and the pressing housing and causes the pressing housing to have a tendency to move toward the first position.
[0017] As an improvement of this utility model, the locking housing is provided with a first waist hole extending along its length direction, the pressing housing is provided with two inclined second waist holes, the locking part of the locking member is cylindrical, the locking part is inserted into the first waist hole and the second waist hole, and the side wall of the second waist hole pushes the locking part to drive the locking part to slide in the first waist hole.
[0018] As an improvement of this utility model, the locking member further includes limiting parts located at both ends of the locking part. The diameter of the limiting part is larger than the diameter of the locking part. The outer surface of the locking housing is provided with a countersunk hole. The countersunk hole is connected to the first waist hole. The limiting part is inserted into the first waist hole and slides within the first waist hole.
[0019] As an improvement of this utility model, there are two reset members. The pressing housing is provided with two symmetrically arranged spring grooves. The two reset members are respectively inserted into the two spring grooves. The upper end of the reset member abuts against the inner wall of the locking housing, and the lower end of the reset member abuts against the bottom wall of the spring groove.
[0020] As an improvement of this utility model, both the rear end of the front push rod and the front end of the rear push rod are provided with end components. The end components have arc-shaped surfaces, and a slot is provided at the apex of the arc-shaped surface of the end components. When the folding trolley is in the unfolded state, the locking part is inserted into the slot. When the folding trolley is out of the unfolded state, the locking part abuts against the arc-shaped surface and can slide along the arc-shaped surface.
[0021] As an improvement of this utility model, the rear end of the front bottom rod is provided with a first pivot member, and the front end of the rear bottom rod is provided with a second pivot member. One of the first pivot member and the second pivot member is provided with a limiting post, and the other of the first pivot member and the second pivot member is provided with a semi-annular limiting groove. The limiting post is inserted into the semi-annular limiting groove. When the folding trolley is in the unfolded state, the limiting post abuts against the end wall of the semi-annular limiting groove.
[0022] As an improvement of this utility model, the number of the limiting posts and the number of the semi-annular limiting grooves are both two, and the two limiting posts are respectively inserted into the two semi-annular limiting grooves, and the distance between the two limiting posts and the pivot is different.
[0023] As an improvement to this utility model, the folding trolley further includes movable casters and fixed casters, the movable casters being connected to the bottom of the front frame assembly and the fixed casters being connected to the bottom of the rear frame assembly.
[0024] As an improvement of this utility model, the folding trolley also includes a sunshade bracket, which is detachably connected to the upper end of the front frame assembly and / or the upper end of the rear frame assembly, and the sunshade bracket is used to connect the sunshade.
[0025] As an improvement to this utility model, the folding trolley further includes a push rod assembly, which includes a connecting rod and a handle. The connecting rod is connected to the rear frame assembly, and the handle is rotatably connected to the push rod assembly.
[0026] The beneficial effects of this utility model are as follows: When the folding trolley is in the unfolded state, the front support assembly, part of the front frame assembly, and part of the front bottom rod form a triangle, and the rear support assembly, part of the rear frame assembly, and part of the rear bottom rod form a triangle. The force on the front part of the front bottom rod is transmitted to the front frame assembly through a pivot. The front support assembly transfers part of the force on the rear part of the front bottom rod to the front frame assembly. The force on the rear part of the rear bottom rod is transmitted to the rear frame assembly through a pivot. The rear support assembly transfers part of the force on the front part of the rear bottom rod to the rear frame assembly. This reduces the pressure on the pivot between the front and rear bottom rods, making the product more robust, less prone to deformation, and improving the product's load-bearing capacity. When folding the trolley, the upper end of the front support assembly slides upward along the front frame assembly, and the upper end of the rear support assembly slides upward along the front frame assembly, making it convenient for users to fold the product, reducing the product's storage volume, and facilitating storage and transportation. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. 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 these drawings without creative effort.
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention in its unfolded state at one angle;
[0030] Figure 2 yes Figure 1 Enlarged view of circle A
[0031] Figure 3 This is a schematic diagram of the overall structure of this utility model from another angle when it is in the unfolded state;
[0032] Figure 4 This is a schematic diagram of the overall structure of the present invention after partial cross-section when it is in the unfolded state;
[0033] Figure 5 This is a partially sectional side view of the present invention in its unfolded state;
[0034] Figure 6 yes Figure 5 Enlarged view of box B;
[0035] Figure 7 This is a partial cross-sectional view of the present invention in its unfolded state and with the locking component unlocked;
[0036] Figure 8 yes Figure 5 Enlarged view of box C;
[0037] Figure 9 This is a schematic diagram of the overall structure of this utility model in its semi-folded state;
[0038] Figure 10 This is a partially sectional side view of the present invention in a semi-folded state;
[0039] Figure 11 yes Figure 10 Enlarged view of box D;
[0040] Figure 12 yes Figure 10 Enlarged view of box E;
[0041] Figure 13 This is a schematic diagram of the overall structure of this utility model in its folded state;
[0042] Figure 14 This is a side view of the present invention in its folded state. Detailed Implementation
[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0044] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0045] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0047] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0048] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0049] Reference Figures 1 to 7 A folding trolley having a folded state and an unfolded state, comprising:
[0050] A front frame assembly 100, a rear frame assembly 200, and a side frame assembly 300 disposed between the front frame assembly 100 and the rear frame assembly 200 for unfolding and folding, wherein the side frame assembly 300 includes:
[0051] The front push rod 310, the front bottom rod 320, the rear push rod 330, and the rear bottom rod 340 are provided, wherein the front end of the front push rod 310 and the front end of the front bottom rod 320 are respectively hinged to the upper and lower sides of the front frame assembly 100, the rear end of the rear push rod 330 and the rear end of the rear bottom rod 340 are respectively hinged to the upper and lower sides of the rear frame assembly 200, and the rear end of the front bottom rod 320 is hinged to the front end of the rear bottom rod 340.
[0052] A locking assembly 400 is provided, with its two ends hinged to the rear end of the front push rod 310 and the front end of the rear push rod 330, respectively, and locking or releasing the front push rod 310 and the rear push rod 330.
[0053] A front support assembly 350, the lower end of which is hinged to the front bottom rod 320, and the upper end of which is connected to the front frame assembly 100 and slides between an unfolded position and a folded position;
[0054] The rear support assembly 360 is hinged at its lower end to the rear bottom rod 340 and at its upper end to the rear frame assembly 200, and slides between the unfolded position and the folded position.
[0055] With the above structural arrangement, when the folding trolley is in the unfolded state, the front support assembly 350, part of the front frame assembly 100, and part of the front bottom rod 320 form a triangle, and the rear support assembly 360, part of the rear frame assembly 200, and part of the rear bottom rod 340 form a triangle. The force on the front part of the front bottom rod 320 is transmitted to the front frame assembly 100 through a pivot. The front support assembly 350 transfers part of the force on the rear part of the front bottom rod 320 to the front frame assembly 100. The force on the rear part of the rear bottom rod 340 is transmitted to... On the rear frame assembly 200, the rear support assembly 360 transfers part of the force on the front of the rear bottom rod 340 to the rear frame assembly 200, reducing the pressure on the pivot between the front bottom rod 320 and the rear bottom rod 340, making the product more robust, less prone to deformation, and improving the product's load-bearing capacity. When storing the folding trolley, the upper end of the front support assembly 350 slides upward along the front frame assembly 100, and the upper end of the rear support assembly 360 slides upward along the front frame assembly 200, making it convenient for users to fold the product, reducing the product's storage volume, and facilitating storage and transportation.
[0056] In this embodiment, the front support assembly 350 includes a front support diagonal rod 351 and a front sliding block 352. The lower end of the front support diagonal rod 351 is hinged to the front bottom rod 320, and the upper end of the front support diagonal rod 351 is hinged to the front sliding block 352. The front sliding block 352 is connected to the front frame assembly 100 and slides between the unfolded position and the folded position. The rear support assembly 360 includes a rear support diagonal rod 361 and a rear sliding block 362. The lower end of the rear support diagonal rod 361 is hinged to the rear bottom rod 340, and the upper end of the rear support diagonal rod 361 is hinged to the rear sliding block 362. The rear sliding block 362 is connected to the rear frame assembly 200 and slides between the unfolded position and the folded position. With the above structure, the front sliding block 352 is fitted onto the front frame assembly 100 and can slide on the front frame assembly 100. The front support rod 351 and the front sliding block 352 are rotatably connected by a pivot, ensuring a stable connection between the front support rod 351 and the front sliding block 352 when the front sliding block 352 slides on the front frame assembly 100. The rear sliding block 362 is fitted onto the rear frame assembly 200 and can slide on the rear frame assembly 200. The rear support rod 361 and the rear sliding block 362 are rotatably connected by a pivot, ensuring a stable connection between the rear support rod 361 and the rear sliding block 362 when the rear sliding block 362 slides on the rear frame assembly 200.
[0057] In this embodiment, the front frame assembly 100 is provided with a front limiting block 110, and the rear frame assembly 200 is provided with a rear limiting block 210. When the folding trolley is in the unfolded state, the lower end of the front sliding block 352 abuts against the front limiting block 110, and the lower end of the rear sliding block 362 abuts against the rear limiting block 210. With the above-described structure, when the folding trolley is in the unfolded state, the force on the front support diagonal rod 351 can be decomposed into a horizontal force and a vertical force. The horizontal force acts on the front frame assembly 100 through the front sliding block 352, and the vertical force acts on the front limiting block 110 through the front sliding block 352, and then on the front frame assembly 100. Similarly, the force on the rear support diagonal rod 361 can be decomposed into a horizontal force and a vertical force. The horizontal force acts on the rear frame assembly 200 through the rear sliding block 362, and the vertical force acts on the rear limiting block 210 through the rear sliding block 362, and then on the rear frame assembly 200. The product is subjected to uniform force and has a stable structure.
[0058] In this embodiment, the side frame assembly 300 further includes a front support rod 370 and a rear support rod 380. The upper end of the front support rod 370 is rotatably connected to the front end of the locking assembly 400, and the lower end of the front support rod 370 is rotatably connected to the front bottom rod 320. The upper end of the rear support rod 380 is rotatably connected to the rear end of the locking assembly 400, and the lower end of the rear support rod 380 is rotatably connected to the rear bottom rod 340. With the above-described structure, in the unfolded state, the front frame assembly 100, the front top rod 310, part of the front bottom rod 320, and the front support rod 370 form a roughly trapezoidal structure, and the rear frame assembly 200, the rear top rod 330, part of the rear bottom rod 340, and the rear support rod 380 form a roughly trapezoidal structure. The rear support rod 380 can transmit the force received at the rear of the rear top rod 330 to the rear bottom rod 340, thereby reducing the force received at the locking part between the locking assembly 400 and the rear top rod 330, preventing damage to the locking part, and extending the product's service life.
[0059] In this embodiment, the locking assembly 400 includes a locking housing 410, a pressing housing 420, two locking members 430, and a reset member 440. The locking members 430 are movably connected to the locking housing 410. The pressing housing 420 is connected to the locking housing 410 and slides between a first position and a second position to drive the locking members 430 to move between a locked position and an unlocked position. The reset member 440 is disposed between the locking housing 410 and the pressing housing 420 and causes the pressing housing 420 to have a tendency to move toward the first position. With the above-described structure, the user grips the locking component 400, places their palm against the locking housing 410, and squeezes the pressing housing 420 with their fingers. This drives the pressing housing 420 to slide from the first position to the second position. The reset component 440 deforms under force, and the pressing housing 420 drives the locking component 430 to move from the locked position to the unlocked position, thereby unlocking the locking component 430 from the front push rod 310 and the rear push rod 330. This allows the front push rod 310 and the rear push rod 330 to rotate relative to the locking component 400, facilitating the user's folding and storage of the product. When the user releases the pressing housing 420, the reset component 440 resets, drives the pressing housing 420 to slide from the second position to the first position, and the pressing housing 420 drives the locking component 430 to move from the unlocked position to the locked position, thereby locking the locking component 430 to the front push rod 310 and the rear push rod 330. This ensures the stability of the product structure and prevents the product from being accidentally folded or pinched by force.
[0060] In this embodiment, the locking housing 410 is provided with a first waist hole 411 extending along its length direction, the pressing housing 420 is provided with two inclined second waist holes 421, the locking part 431 of the locking member 430 is cylindrical, the locking part 431 is inserted into the first waist hole 411 and the second waist hole 421, the side wall of the second waist hole 421 pushes the locking part 431 to drive the locking part 431 to slide within the first waist hole 411. With the above structure, when the pressing housing 420 slides from the first position to the second position, the outer wall of the second waist hole 421 pushes the locking part 431, and the locking part 431 slides from the outside of the first waist hole 411 to the inside, so that the locking part 431 is disengaged from the front push rod 310 and the rear push rod 330, thereby unlocking; when the pressing housing 420 slides from the second position to the first position, the inner wall of the second waist hole 421 pushes the locking part 431, and the locking part 431 slides from the inside of the first waist hole 411 to the outside, so that the locking part 431 is locked to the front push rod 310 and the rear push rod 330.
[0061] In this embodiment, the locking member 430 further includes limiting portions 432 located at both ends of the locking part 431. The diameter of the limiting portions 432 is larger than the diameter of the locking part 431. The outer surface of the locking housing 410 is provided with countersunk holes 412, which communicate with the first waist hole 411. The limiting portions 432 are inserted into the first waist hole 411 and slide within it. With the above structure, the diameter of the limiting portions 432 is larger than the diameter of the locking part 431, preventing the locking part 431 from disengaging from the first waist hole 411 and / or the second waist hole 421, thus ensuring product stability. Simultaneously, the limiting portions 432, located within the countersunk holes 412, prevent the locking member 430 from scratching or pinching the user during translation, resulting in a better user experience.
[0062] In this embodiment, there are two reset members 440. The pressing housing 420 has two symmetrically arranged spring grooves 422. The two reset members 440 are respectively inserted into the two spring grooves 422. The upper end of the reset member 440 abuts against the inner wall of the locking housing 410, and the lower end of the reset member 440 abuts against the bottom wall of the spring groove 422. Through the above structure, the spring grooves 422 can limit the reset members 440, preventing the reset members 440 from disengaging during deformation or reset, making the product structure more stable. Furthermore, the symmetrical arrangement of the two reset members 440 makes the product more stable under force.
[0063] In this embodiment, both the rear end of the front push rod 310 and the front end of the rear push rod 330 are provided with end components 302. The end component 302 has an arc-shaped surface, and a slot 301 is provided at the apex of the arc-shaped surface of the end component 302. When the folding trolley is in the unfolded state, the locking part 431 is inserted into the slot 301. When the folding trolley is out of the unfolded state, the locking part 431 abuts against the arc-shaped surface and can slide along the arc-shaped surface. With the above-described structure, when the folding trolley changes between the unfolded and folded states, the locking part 431 disengages from the slot 301 to allow relative rotation between the front push rod 310, the rear push rod 330, and the locking housing 410. Furthermore, after the locking part 431 disengages from the slot 301 and the front push rod 310, the rear push rod 330, and the locking housing 410 rotate relative to each other, the two locking parts 430 tend to move toward the locked position under the action of the reset member 440 and the pressing housing 420, so that the surface of the locking part 431 abuts against the arc-shaped surface of the end member 302. The arc-shaped surface makes it easier for the front push rod 310 and the rear push rod 330 to rotate relative to the locking housing 410, making the folding trolley transition state smoother and less prone to jamming.
[0064] In this embodiment, the rear end of the front bottom rod 320 is provided with a first pivot member 321, and the front end of the rear bottom rod 340 is provided with a second pivot member 341. One of the first pivot member 321 and the second pivot member 341 is provided with a limiting post 303, and the other of the first pivot member 321 and the second pivot member 341 is provided with a semi-annular limiting groove 304. The limiting post 303 is inserted into the semi-annular limiting groove 304. When the folding trolley is in the unfolded state, the limiting post 303 abuts against the end wall of the semi-annular limiting groove 304. With the above structure, when the folding trolley is in the unfolded state, the front bottom rod 320 and the rear bottom rod 340 are on the same horizontal plane. The limiting post 303 abuts against the end wall of the semi-annular limiting groove 304, preventing the front bottom rod 320 and the rear bottom rod 340 from continuing to rotate, preventing the middle of the product from collapsing downwards, and making the front bottom rod 320 and the rear bottom rod 340 form a stable bottom support platform, improving the stability of the product. When the user needs to switch the folding trolley to the folded state, the hinge center of the front bottom rod 320 and the rear bottom rod 340 moves upwards, the front bottom rod 320 and the rear bottom rod 340 rotate relative to each other, and the limiting post 303 slides along the semi-annular limiting groove 304, so that the product can be switched to the folded state more smoothly.
[0065] In this embodiment, there are two limiting posts 303 and two semi-annular limiting grooves 304. The two limiting posts 303 are respectively inserted into the two semi-annular limiting grooves 304, and the distances between the two limiting posts 303 and the pivot 305 are different. With the above structure, the two limiting posts 303 are respectively inserted into the two semi-annular limiting grooves 304. When the folding trolley is in the unfolded state, the front bottom rod 320 and the rear bottom rod 340 are on the same horizontal plane. The two limiting posts 303 abut against the end wall of the semi-annular limiting groove 304, forming two support points, making the connection between the front bottom rod 320 and the rear bottom rod 340 more stable. The two semi-annular limiting grooves 304 are concentrically arranged. When the user needs to switch the folding trolley to the folded state, the two limiting posts 303 slide in the two semi-annular limiting grooves 304 respectively.
[0066] In this embodiment, the folding trolley further includes movable casters 710 and fixed casters 720. The movable casters 710 are connected to the bottom of the front frame assembly 100, and the fixed casters 720 are connected to the bottom of the rear frame assembly 200. With this structure, the movable casters 710 and fixed casters 720 work together to facilitate user movement, making it easier and less strenuous to carry children or goods. Furthermore, the movable casters 710 can rotate around a vertical axis, allowing them to change direction, thus facilitating user movement of the trolley and simplifying operation.
[0067] In this embodiment, the folding trolley further includes a sunshade bracket 800, which is detachably connected to the upper end of the front frame assembly 100 and / or the upper end of the rear frame assembly 200. The sunshade bracket 800 is used to connect a sunshade. With this structure, during use, the user can connect the sunshade to the sunshade bracket 800, allowing the sunshade to cover the upper opening of the product, providing shade and improving the user experience.
[0068] In this embodiment, the folding trolley further includes a push rod assembly 900, which includes a connecting rod 910 and a handle 920. The connecting rod 910 is connected to the rear frame assembly 200, and the handle 920 is rotatably connected to the push rod assembly 900. With this structure, during use, the user can rotate the handle 920 to adjust it to a suitable position and then fix it, allowing for a more comfortable grip on the handle 920 to control the movement of the folding trolley. When storing products, the handle 920 can be rotated downwards to fit snugly against the connecting rod 910, reducing the storage volume of the product and facilitating its transport and storage.
Claims
1. A folding trolley, having a folded state and an unfolded state, characterized in that, include: A front frame assembly (100), a rear frame assembly (200), and a side frame assembly (300) disposed between the front frame assembly (100) and the rear frame assembly (200) for unfolding and folding, wherein the side frame assembly (300) includes: A front top rod (310), a front bottom rod (320), a rear top rod (330), and a rear bottom rod (340), wherein the front end of the front top rod (310) and the front end of the front bottom rod (320) are respectively hinged to the upper and lower sides of the front frame assembly (100), the rear end of the rear top rod (330) and the rear end of the rear bottom rod (340) are respectively hinged to the upper and lower sides of the rear frame assembly (200), and the rear end of the front bottom rod (320) is hinged to the front end of the rear bottom rod (340); A locking assembly (400) is provided, with its two ends hinged to the rear end of the front push rod (310) and the front end of the rear push rod (330), respectively, to lock or release the front push rod (310) and the rear push rod (330). A front support assembly (350) is provided, the lower end of which is hinged to the front bottom rod (320), and the upper end of which is connected to the front frame assembly (100) and slides between an unfolded position and a folded position. A rear support assembly (360) is provided, the lower end of which is hinged to the rear bottom rod (340), and the upper end of which is connected to the rear frame assembly (200) and slides between an unfolded position and a folded position.
2. The folding trolley according to claim 1, characterized in that, The front support assembly (350) includes a front support diagonal rod (351) and a front sliding block (352). The lower end of the front support diagonal rod (351) is hinged to the front bottom rod (320), and the upper end of the front support diagonal rod (351) is hinged to the front sliding block (352). The front sliding block (352) is connected to the front frame assembly (100) and slides between the unfolded position and the folded position. The rear support assembly (360) includes a rear support diagonal rod (361) and a rear sliding block (362). The lower end of the rear support diagonal rod (361) is hinged to the rear bottom rod (340), and the upper end of the rear support diagonal rod (361) is hinged to the rear sliding block (362). The rear sliding block (362) is connected to the rear frame assembly (200) and slides between the unfolded position and the folded position.
3. The folding trolley according to claim 2, characterized in that, The front frame assembly (100) is provided with a front limiting block (110), and the rear frame assembly (200) is provided with a rear limiting block (210). When the folding trolley is in the unfolded state, the lower end of the front sliding block (352) abuts against the front limiting block (110), and the lower end of the rear sliding block (362) abuts against the rear limiting block (210).
4. The folding trolley according to claim 1, characterized in that, The side frame assembly (300) further includes a front support rod (370) and a rear support rod (380). The upper end of the front support rod (370) is rotatably connected to the front end of the locking assembly (400), and the lower end of the front support rod (370) is rotatably connected to the front bottom rod (320). The upper end of the rear support rod (380) is rotatably connected to the rear end of the locking assembly (400), and the lower end of the rear support rod (380) is rotatably connected to the rear bottom rod (340).
5. The folding trolley according to claim 1, characterized in that, The locking assembly (400) includes a locking housing (410), a pressing housing (420), two locking members (430), and a reset member (440). The locking members (430) are movably connected to the locking housing (410). The pressing housing (420) is connected to the locking housing (410) and slides between a first position and a second position to drive the locking members (430) to move between a locked position and an unlocked position. The reset member (440) is disposed between the locking housing (410) and the pressing housing (420) and causes the pressing housing (420) to have a tendency to move toward the first position.
6. The folding trolley according to claim 5, characterized in that, The locking housing (410) is provided with a first waist hole (411) extending along its length direction, and the pressing housing (420) is provided with two inclined second waist holes (421). The locking part (431) of the locking member (430) is cylindrical. The locking part (431) is inserted into the first waist hole (411) and the second waist hole (421). The side wall of the second waist hole (421) pushes the locking part (431) to drive the locking part (431) to slide in the first waist hole (411).
7. The folding trolley according to claim 6, characterized in that, The locking member (430) further includes limiting portions (432) located at both ends of the locking part (431). The diameter of the limiting portion (432) is larger than the diameter of the locking part (431). The outer surface of the locking housing (410) is provided with a countersunk hole (412). The countersunk hole (412) is connected to the first waist hole (411). The limiting portion (432) is inserted into the first waist hole (411) and slides within the first waist hole (411).
8. The folding trolley according to claim 5, characterized in that, There are two reset members (440). The pressing housing (420) is provided with two symmetrically arranged spring grooves (422). The two reset members (440) are respectively inserted into the two spring grooves (422). The upper end of the reset member (440) abuts against the inner wall of the locking housing (410), and the lower end of the reset member (440) abuts against the bottom wall of the spring groove (422).
9. The folding trolley according to claim 6, characterized in that, Both the rear end of the front push rod (310) and the front end of the rear push rod (330) are provided with end components (302). The end component (302) has an arc-shaped surface. A slot (301) is provided at the apex of the arc-shaped surface of the end component (302). When the folding trolley is in the unfolded state, the locking part (431) is inserted into the slot (301). When the folding trolley is out of the unfolded state, the locking part (431) abuts against the arc-shaped surface and can slide along the arc-shaped surface.
10. The folding trolley according to claim 1, characterized in that, The front bottom rod (320) has a first pivot (321) at its rear end and a second pivot (341) at its front end. One of the first pivot (321) and the second pivot (341) has a limiting post (303), and the other of the first pivot (321) and the second pivot (341) has a semi-annular limiting groove (304). The limiting post (303) is inserted into the semi-annular limiting groove (304). When the folding trolley is in the unfolded state, the limiting post (303) abuts against the end wall of the semi-annular limiting groove (304).