Stroller folding structure and stroller

Abstract

The application discloses a trolley folding structure and trolley, a connecting piece is arranged between upper and lower winches and slides in the thickness direction, two ends of the connecting piece in the thickness direction are respectively provided with elastic pieces and driving wheels, the driving wheels are rotationally arranged on the upper winch and form wedge type cooperation in the thickness direction; the trolley folding structure and trolley are characterized in that: the rear legs and the front legs form a rotation freedom of 90 to 170 degrees, the main supporting part and the front legs or the rear legs are hingedly connected to form a rotation freedom of 45 to 90 degrees; the elastic pieces press the connecting piece in a free state to circumferentially fix the upper winch and the lower winch; when the sliding block is operated, the driving wheels move in the thickness direction against the elastic pieces to push the connecting piece and release the circumferential fixing of the upper winch and the lower winch, so that the main supporting part can be folded, and the linkage assembly folds the rear legs, the front legs and the supporting arm in the process of folding the main supporting part.

Description

Technical Field

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

[0002] A folding stroller structure refers to a functional structure cleverly designed through specific mechanical means that allows the stroller to be easily unfolded during use and compactly folded for storage when not in use. This design is widely used in various products such as baby strollers, shopping carts, and luggage carts, primarily to save storage and transportation space while significantly improving the product's portability and flexibility. This structure typically involves hinges, linkage mechanisms, or other mechanical principles to ensure flexible and reliable connections between the stroller's components and to provide stable support when unfolded. During the design process, the strength, durability, and ease of operation of the structure must be comprehensively considered to ensure that users enjoy both a convenient operating experience and safety during use.

[0003] There are many different designs for folding stroller structures, each constantly striving to maximize space utilization and optimize ease of use. Through continuous research and innovation, designers aim to further simplify the folding and unfolding process while ensuring structural stability and durability, reducing the effort required to operate the stroller and making it easier and faster for users. Continuous optimization of space utilization and ease of use remains a key focus in the development of folding stroller structures, aiming to provide users with more efficient and convenient travel solutions. Utility Model Content

[0004] The main purpose of this utility model is to provide a folding structure for a trolley and a trolley in order to solve the problem of insufficient optimization of existing folding structures for trolleys.

[0005] To achieve the above objectives, this utility model provides a folding structure for a trolley, comprising: front legs; The upper end of the rear leg is hinged to the upper end of the front leg, forming a rotational degree of freedom of 90 to 170 degrees. The main support includes a lower rod and an upper rod. The lower end of the lower rod is hinged to the front leg or the rear leg to form a rotational degree of freedom of 45 to 90 degrees. The upper end of the lower rod is connected to a lower winch, and the lower end of the upper rod is connected to an upper winch. The upper winch and the lower winch are hinged and slidably connected by a connecting member. The two ends of the connecting member in the thickness direction are respectively provided with an elastic member and a drive wheel. The drive wheel is rotatably mounted on the upper winch and forms a wedge-shaped engagement in the thickness direction. In the free state, the elastic member presses the connecting member to fix the upper winch and the lower winch circumferentially. The support arm is hinged in the middle to the middle of the lower rod; The linkage assembly includes a linkage rod and a connecting rod hinged to the linkage rod. The middle part of the linkage rod is hinged to the rear end of the support arm, the bottom end of the linkage rod is hinged to the middle part of the rear leg through the connecting rod, and the top end of the linkage rod is hinged to the lower end of the lower rod. The upper rod is equipped with a slider, and a control line is connected to the slider. The control line is connected to the drive wheel. The slider's sliding rotation and release of the drive wheel, as well as the circumferential fixation and release of the upper and lower winches, are all achieved.

[0006] Furthermore, the upper rod is elastically supported by a pressing member, which drives the slider when it presses against and springs back off the upper rod.

[0007] Furthermore, a locking key is provided corresponding to the pressing member, and the movement of the locking key releases and locks the pressing member.

[0008] Furthermore, the upper rod includes a lower sub-rod and an upper sub-rod that are sleeved and telescopically connected, and the upper winch is disposed on the lower sub-rod.

[0009] Furthermore, the folding structure of the trolley also includes a telescopic control component; The connection between the lower sub-rod and the upper sub-rod is elastically supported by a fixing pin, and a pin top block is slidably provided inside the lower sub-rod corresponding to the fixing pin; The telescopic control assembly includes a paddle and a control line connected to each other. The paddle is slidably disposed on the main support part along the length direction, and the control line is connected to the pin block.

[0010] Furthermore, the lever is disposed on the upper rod.

[0011] Furthermore, the connector is in the shape of a star-shaped disk.

[0012] Furthermore, the lower end of the lower rod is clamped between the front leg and the rear leg.

[0013] Furthermore, the hinge rotational freedom between the upper end of the rear leg and the upper end of the front leg is achieved through abutment restriction, and the hinge rotational freedom between the lower end of the lower rod and the front leg or the rear leg is achieved through abutment restriction.

[0014] This utility model also provides a trolley, including the folding structure described above.

[0015] The folding structure and trolley provided by this utility model have a rear leg and a front leg with a rotational degree of freedom of 90 to 170 degrees. The main support part is hinged to the front leg or the rear leg to form a rotational degree of freedom of 45 to 90 degrees. The upper winch and the lower winch are hinged and slidably connected by a connecting member. The two ends of the connecting member in the thickness direction are respectively provided with an elastic member and a drive wheel. In the free state, the elastic member presses the connecting member to fix the upper winch and the lower winch circumferentially. When the slider is operated, the drive wheel overcomes the movement of the elastic member in the thickness direction and pushes the connecting member, releasing the circumferential fixation of the upper winch and the lower winch, thereby enabling the main support part to be folded. During the folding process of the main support part, the linkage component folds the rear leg, the front leg, and the support arm. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the unfolded folding structure of the trolley according to the first embodiment of this utility model (first perspective); Figure 2 yes Figure 1 A partial magnification; Figure 3 This is a schematic diagram of the unfolded folding structure of the trolley according to the first embodiment of this utility model (second perspective). Figure 4 This is a folding schematic diagram (first perspective) of the folding structure of the trolley according to the first embodiment of this utility model; Figure 5 This is a folding diagram (second perspective) of the folding structure of the trolley according to the first embodiment of this utility model. Figure 6 This is a disassembly diagram (first perspective) of the front leg, rear leg, and lower rod in the folding structure of the trolley according to the first embodiment of this utility model. Figure 7 This is a disassembly diagram (second perspective) of the front leg, rear leg, and lower rod in the folding structure of the trolley according to the first embodiment of this utility model. Figure 8 This is a disassembly diagram (first perspective) of the upper and lower rods in the folding structure of the trolley according to the first embodiment of this utility model. Figure 9 This is a disassembly diagram (second perspective) of the upper and lower rods in the folding structure of the trolley according to the first embodiment of this utility model. Figure 10 This is a schematic diagram of the operation of the pin top block and drive wheel in the folding structure of the trolley in the first embodiment of this utility model.

[0017] Reference numerals: 100-Front leg, 200-Rear leg, 300-Main support, 310-Lower rod, 311-Lower winch, 320-Upper rod, 321-Upper winch, 322-Lower sub-rod, 323-Upper sub-rod, 324-Fixing pin, 325-Pin top block, 326-Slider, 327-Control line two, 328-Pressing part, 329-Locking key, 330-Connecting part, 340-Drive wheel, 400-Supporting arm, 510-Linkage rod, 520-Connecting rod, 610-Pulley, 620-Control line one. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0020] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0021] Reference Figures 1 to 10 In one embodiment of this utility model, a folding trolley structure includes: include: front legs 100; The rear leg 200 is hinged at its upper end to the upper end of the front leg 100, forming a rotational degree of freedom of 90 to 170 degrees. The main support 300 includes a lower rod 310 and an upper rod 320. The lower end of the lower rod 310 is hinged to the front leg 100 or the rear leg 200 to form a rotational degree of freedom of 45 to 90 degrees. The upper end of the lower rod 310 is connected to a lower winch 311, and the lower end of the upper rod 320 is connected to an upper winch 321. The upper winch 321 and the lower winch 311 are hinged and slidably disposed between their thicknesses. The two ends of the connecting member 330 in the thickness direction are respectively provided with an elastic element and a drive wheel 340. The drive wheel 340 is rotatably disposed on the upper winch 321 and forms a wedge-shaped engagement in the thickness direction. In the free state, the elastic element presses the connecting member 330 to fix the upper winch 321 and the lower winch 311 circumferentially. The support arm 400 is hinged in the middle to the middle of the lower rod 310; The linkage assembly includes a linkage rod 510 and a connecting rod 520 hinged to the linkage rod 510. The middle part of the linkage rod 510 is hinged to the rear end of the support arm 400, the bottom end of the linkage rod 510 is hinged to the middle part of the rear leg 200 through the connecting rod 520, and the top end of the linkage rod 510 is hinged to the lower end of the lower rod 310. The upper rod 320 is slidably provided with a slider 326, and a control line 327 is connected to the slider 326. The control line 327 is connected to the drive wheel 340. The slider 326 slides and rotates, and releases the upper winch 321 and the lower winch 311 of the drive wheel 340 in the circumferential direction.

[0022] In existing technologies, continuous optimization of space utilization and ease of operation has always been the key focus of research and development on folding stroller structures, aiming to provide users with more efficient and convenient travel solutions.

[0023] The folding structure of the trolley provided by this utility model includes a front leg 100, a rear leg 200, a main support part 300, a support arm 400, a linkage component, and a telescopic control component.

[0024] The upper end of the rear leg 200 is hinged to the upper end of the front leg 100, forming a rotational degree of freedom of 90 to 170 degrees. For example, protrusions are provided at corresponding positions on the rear leg 200 and the front leg 100. When the protrusions on both legs abut, the rotation between the rear leg 200 and the front leg 100 is restricted, thereby forming a rotational degree of freedom of a set angle.

[0025] The main support 300 includes a lower rod 310 and an upper rod 320. The lower end of the lower rod 310 is hinged to the front leg 100 or the rear leg 200, forming a rotational degree of freedom of 45 to 90 degrees. The upper end of the lower rod 310 is connected to a lower winch 311. The lower end of the upper rod 320 is connected to an upper winch 321. A connecting member 330 is hinged between the upper winch 321 and the lower winch 311 and slidably disposed between their thicknesses. An elastic element and a drive wheel 340 are respectively provided at both ends of the connecting member 330 in the thickness direction. The elastic element can be a disc spring or a coil spring, etc. The drive wheel 340 is rotatably disposed on the upper winch 321 and forms a wedge-shaped engagement in the thickness direction, so that when the drive wheel 340 rotates under the action of an external force, displacement occurs in the thickness direction. When the elastic element is in a free state, it presses the connecting member 330 to fix the upper winch 321 and the lower winch 311 circumferentially. At this time, the connecting member 330 is in contact with both the upper winch 321 and the lower winch 311.

[0026] The support arm 400 is hinged at the middle of its length direction to the middle of the lower rod 310's length direction.

[0027] The linkage assembly includes a linkage rod 510 and a connecting rod 520 hinged to the linkage rod 510. The middle part of the linkage rod 510 is hinged to the rear end of the support arm 400. The bottom end of the linkage rod 510 is hinged to the middle of the rear leg 200 via the connecting rod 520. The top end of the linkage rod 510 is hinged to the lower end of the lower rod 310. The linkage assembly forms a linkage structure that can provide support in one direction while allowing rotation when the connection between the main support parts 300 is broken.

[0028] A slider 326 is slidably mounted on the upper rod 320. A control line 327 is connected to the slider 326 and is connected to the drive wheel 340.

[0029] The drive slider 326 slides forward and operates the control line 327. The control line 327 pulls the drive wheel 340 to rotate. During the rotation, the drive wheel 340 overcomes the movement of the elastic element in the thickness direction and pushes the connector 330, thereby releasing the circumferential fixation of the upper winch 321 and the lower winch 311.

[0030] When the drive slider 326 is not driven, the elastic element drives the drive wheel 340 to move in the thickness direction and pushes the connector 330, and the circumferential fixed release of the upper winch 321 and the lower winch 311 is re-formed.

[0031] During the unfolding process, the front leg 100 and the rear leg 200 are unfolded to form a support, the main support part 300 is pulled upward, and the slider 326 is operated to adjust the angle between the lower rod 310 and the upper rod 320 to a suitable angle (e.g., 180 degrees). During this process, the linkage component unfolds the support arm 400 and also supports the main support part 300.

[0032] During the folding process, the operating slider 326 releases the circumferential fixation between the lower rod 310 and the upper rod 320, rotates the main support part 300 to store it, and in this process, the linkage component retracts the support arm 400, and the front leg 100 and the rear leg 200 are also folded.

[0033] In summary, the rear leg 200 and the front leg 100 have a rotational degree of freedom of 90 to 170 degrees, and the main support 300 is hinged to the front leg 100 or the rear leg 200 to form a rotational degree of freedom of 45 to 90 degrees. The upper winch 321 and the lower winch 311 are hinged and slidably arranged with a connecting member 330 between their thicknesses. The two ends of the connecting member 330 in the thickness direction are respectively provided with elastic members and drive wheels 340. In the free state, the elastic members press the connecting member 330 to fix the upper winch 321 and the lower winch 311 circumferentially. When the slider 326 is operated, the drive wheel 340 overcomes the movement of the elastic members in the thickness direction and pushes the connecting member 330, releasing the circumferential fixation of the upper winch 321 and the lower winch 311, thereby enabling the main support 300 to be folded. During the folding process of the main support 300, the linkage assembly folds the rear leg 200, the front leg 100, and the support arm 400.

[0034] Reference Figure 9 In one embodiment, the upper rod 320 is elastically supported by a pressing member 328, which drives the slider 326 when it presses against and springs back off the upper rod 320.

[0035] In this embodiment, a pressing member 328 is added to operate the slider 326, transforming the operation action into pressing, thereby improving the convenience of operation. A wedge-shaped engagement can be formed between the pressing member 328 and the slider 326, so that when the pressing member 328 is pressed, the slider 326 can be compressed and slide.

[0036] Reference Figure 10 In one embodiment, a locking key 329 is provided corresponding to the pressing member 328, and the locking key 329 releases and locks the pressing member 328.

[0037] In this embodiment, when the locking key 329 locks the pressing member 328, the pressing member 328 cannot be operated, preventing accidental sliding; when the locking key 329 releases the pressing member 328, the pressing member 328 can be operated. The locking key 329 can be an elastic support, thereby enabling pressing and rebound actions for easy operation.

[0038] Reference Figures 1 to 9 In one embodiment, the upper rod 320 includes a lower sub-rod 322 and an upper sub-rod 323 that are sleeved and telescopically connected, and the upper winch 321 is disposed on the lower sub-rod 322.

[0039] In this embodiment, by setting the upper rod 320 as a telescopic structure, the size can be flexibly set. Specifically, the telescopic structure of the upper rod 320 can be varied and is not limited. For example, the upper rod 320 can be a segmented structure with a gradually changing diameter, and an elastic protrusion locking system can be provided to lock and release the length of the upper rod 320.

[0040] Reference Figures 1 to 10 In one embodiment, the trolley folding structure further includes a telescopic control assembly; A fixing pin 324 is elastically supported at the connection between the lower sub-rod 322 and the upper sub-rod 323, and a pin top block 325 is slidably provided inside the lower sub-rod 322 corresponding to the fixing pin 324. The telescopic control assembly includes a paddle 610 and a control line 620 connected to each other. The paddle 610 is slidably disposed on the main support 300 along the length direction, and the control line 620 is connected to the pin block 325.

[0041] In this embodiment, a locking structure that is easy to operate is provided, and the state of the fixing pin 324 can be operated by the slider 326 at the position of the upper rod 323.

[0042] Reference Figure 1 In one embodiment, the lever 610 is disposed on the upper rod 320.

[0043] In this embodiment, the position of the lever 610 is raised for easier operation. More preferably, the lever 610 is located at the upper part of the upper rod 320 in the height direction.

[0044] Reference Figure 9 In one embodiment, the connector 330 is in the shape of a star-shaped disk.

[0045] In this embodiment, the structure of the connector 330 is restricted, thereby achieving a stable circumferentially fixed state between the upper winch 321 and the lower winch 311. The specific structure of the connector 330 may include a central annular structure and multiple protrusions disposed on the outer periphery of the annular structure.

[0046] Reference Figure 6 In one embodiment, the lower end of the lower rod 310 is clamped between the front leg 100 and the rear leg 200.

[0047] In this embodiment, the lower end of the lower rod 310 is positioned between the front leg 100 and the rear leg 200, which makes fixing simple and the structure stable.

[0048] Reference Figures 6 to 9In one embodiment, the hinge rotational freedom between the upper end of the rear leg 200 and the upper end of the front leg 100 is achieved by abutment restriction, and the hinge rotational freedom between the lower end of the lower rod 310 and the front leg 100 or the rear leg 200 is achieved by abutment restriction.

[0049] In this embodiment, taking the rear leg 200 and the front leg 100 as examples, protrusions are provided at corresponding positions on the rear leg 200 and the front leg 100. When the protrusions on the two legs collide, the rotation between the rear leg 200 and the front leg 100 is restricted.

[0050] This utility model also provides a trolley, including the folding structure described above.

[0051] In this embodiment, the trolley includes a folding structure, specifically matching conventional wheels, a basket, and a brake. The folding structure simplifies the folding process and minimizes space usage.

[0052] In summary, the folding trolley structure and trolley provided by this utility model have a rear leg 200 and a front leg 100 with a rotational degree of freedom of 90 to 170 degrees. The main support 300 is hinged to the front leg 100 or the rear leg 200, forming a rotational degree of freedom of 45 to 90 degrees. The upper winch 321 and the lower winch 311 are hinged together and slidably connected by a connecting member 330. Elastic members and drive wheels 340 are respectively provided at both ends of the connecting member 330 in the thickness direction. In its free state, the elastic element presses against the connector 330 to circumferentially fix the upper winch 321 and the lower winch 311. When the slider 326 is operated, the drive wheel 340 overcomes the movement of the elastic element in the thickness direction and pushes the connector 330, releasing the circumferential fixation of the upper winch 321 and the lower winch 311, thereby enabling the main support 300 to be folded. During the folding process of the main support 300, the linkage assembly folds the rear leg 200, the front leg 100, and the support arm 400.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A folding structure for a trolley, characterized in that, include: front legs; The upper end of the rear leg is hinged to the upper end of the front leg, forming a rotational degree of freedom of 90 to 170 degrees. The main support includes a lower rod and an upper rod. The lower end of the lower rod is hinged to the front leg or the rear leg to form a rotational degree of freedom of 45 to 90 degrees. The upper end of the lower rod is connected to a lower winch, and the lower end of the upper rod is connected to an upper winch. The upper winch and the lower winch are hinged and slidably connected by a connecting member. The two ends of the connecting member in the thickness direction are respectively provided with an elastic member and a drive wheel. The drive wheel is rotatably mounted on the upper winch and forms a wedge-shaped engagement in the thickness direction. In the free state, the elastic member presses the connecting member to fix the upper winch and the lower winch circumferentially. The support arm is hinged in the middle to the middle of the lower rod; The linkage assembly includes a linkage rod and a connecting rod hinged to the linkage rod. The middle part of the linkage rod is hinged to the rear end of the support arm, the bottom end of the linkage rod is hinged to the middle part of the rear leg through the connecting rod, and the top end of the linkage rod is hinged to the lower end of the lower rod. The upper rod is equipped with a slider, and a control line is connected to the slider. The control line is connected to the drive wheel. The slider's sliding rotation and release of the drive wheel, as well as the circumferential fixation and release of the upper and lower winches, are all achieved.

2. The folding structure of the trolley according to claim 1, characterized in that, The upper rod is elastically supported by a pressing member, which drives the slider when it presses against and springs back off the upper rod.

3. The folding structure of the trolley according to claim 2, characterized in that, A locking key is provided corresponding to the pressing component, and the movement of the locking key releases and locks the pressing component.

4. The folding structure of the trolley according to claim 1, characterized in that, The upper rod includes a lower sub-rod and an upper sub-rod that are sleeved and telescopically connected, and the upper winch is disposed on the lower sub-rod.

5. The folding structure of the trolley according to claim 4, characterized in that, The folding structure of the trolley also includes a telescopic control component; The connection between the lower sub-rod and the upper sub-rod is elastically supported by a fixing pin, and a pin top block is slidably provided inside the lower sub-rod corresponding to the fixing pin; The telescopic control assembly includes a paddle and a control line connected to each other. The paddle is slidably disposed on the main support part along the length direction, and the control line is connected to the pin block.

6. The folding structure of the trolley according to claim 5, characterized in that, The lever is located on the upper rod.

7. The folding structure of the trolley according to any one of claims 1 to 6, characterized in that, The connector is in the shape of a star-shaped disk.

8. The folding structure of the trolley according to any one of claims 1 to 6, characterized in that, The lower end of the lower rod is clamped between the front leg and the rear leg.

9. The folding structure of the trolley according to any one of claims 1 to 6, characterized in that, The hinge rotational freedom between the upper end of the rear leg and the upper end of the front leg is achieved by contact restriction, and the hinge rotational freedom between the lower end of the lower rod and the front leg or the rear leg is achieved by contact restriction.

10. A trolley, characterized in that, Includes the folding cart structure as described in any one of claims 1 to 9.

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