Baby carriage folding structure

Abstract

The utility model discloses a baby carriage folding structure which comprises a carriage frame assembly and a push rod assembly, a whole carriage folding structure is arranged between the carriage frame assembly and the push rod assembly, the push rod assembly comprises a lower rod and an upper rod, a push rod folding structure is arranged between the lower rod and the upper rod, and the push rod folding structure comprises a first rotating joint. The first rotating joint comprises a first rotating seat and a second rotating seat, a rotating shaft is arranged on the first rotating seat, a limiting hole is formed in the second rotating seat, and the rotating shaft is inserted into the limiting hole and can slide and rotate in the limiting hole; an inserting structure capable of limiting rotation of the first rotating seat and the second rotating seat after the first rotating seat and the second rotating seat are inserted is arranged between the first rotating seat and the second rotating seat, and a first joint lock used for locking the first rotating seat and the second rotating seat so as to limit relative rotation or relative movement of the first rotating seat and the second rotating seat in the length direction of the lower rod is further arranged between the first rotating seat and the second rotating seat. The folding chair has the advantages of being simple in structure, convenient to fold and stable in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of child strollers, in particular to a folding structure of a child stroller. Background Art

[0002] In modern families, strollers have become one of the indispensable tools for raising children. With the acceleration of urbanization and the increasingly compact family space, the portability of strollers is particularly important. Therefore, strollers with folding functions are becoming more and more popular in the market. However, traditional strollers often have some shortcomings when designing the folding structure.

[0003] First, the folding structure of the push rod is usually designed to be complex. This complexity is not only reflected in the diversity of the structure, but also in the cumbersome operation. When users fold or unfold the push rod, they often need to perform multiple steps, and each step requires precise operation, which undoubtedly increases the difficulty of use, especially for users with less strength or unskilled operation, this process may become quite difficult.

[0004] Secondly, the folding structure of the entire cart also faces similar problems. In order to achieve compact folding of the cart, designers often use complex structures with multiple joints or parts. This design brings inconvenience in operation. When folding or unfolding the cart, users need to operate multiple parts in a specific order, which is not only time-consuming but also prone to errors. Especially in emergency situations, this inconvenience may be magnified.

[0005] In addition, the complex folding structure may also reduce the durability and stability of the cart. Frequent folding and unfolding may accelerate the wear of components, thus affecting the overall performance and service life of the cart.

[0006] Therefore, the market urgently needs a folding design of a baby stroller that is both easy to operate and can ensure structural stability. The utility model is made based on this situation. Utility Model Content

[0007] The utility model aims to overcome the deficiencies of the prior art and provide a baby carriage folding structure which has a simple structure, is convenient to fold and has a stable structure.

[0008] The utility model is realized through the following technical solutions:

[0009] In order to solve the above technical problems, the utility model provides a baby stroller folding structure, including a frame assembly and a push rod assembly, and a whole vehicle folding structure is arranged between the two. The push rod assembly includes a lower rod and an upper rod, and a push rod folding structure is arranged between the two. The push rod folding structure includes a first rotating joint arranged between the upper end of the lower rod and the lower end of the upper rod. The first rotating joint includes a first rotating seat arranged at the upper end of the lower rod, and a second rotating seat arranged at the lower end of the upper rod, and the first rotating seat is provided with a rotating shaft, and the second rotating seat is provided with a strip-shaped limiting hole extending along the length direction of the upper rod, and the rotating shaft is inserted into the limiting hole and can slide and rotate therein; a plug-in structure is provided between the first rotating seat and the second rotating seat, which can limit the rotation of the two after the two are plugged in, and a first joint lock is also provided between the first rotating seat and the second rotating seat for locking the two to limit the relative rotation or relative movement along the length direction of the lower rod.

[0010] In order to further solve the technical problem to be solved by the utility model, the utility model provides a baby carriage folding structure, wherein the plug-in structure includes a first plug arranged on a first rotating seat, and a second plug arranged on a second rotating seat and capable of plugging and cooperating with the first plug.

[0011] In order to further solve the technical problem to be solved by the utility model, the utility model provides a baby carriage folding structure, wherein the first joint lock is used to limit the relative movement of the first rotating seat and the second rotating seat along the length direction of the lower rod, and the first joint lock includes a lock groove arranged on the first rotating seat, a lock hook rotatably connected to the second rotating seat and capable of hooking in the lock groove, an unlocking mechanism capable of driving the lock hook to disengage from the lock groove is connected to the lock hook, and a first elastic reset member for elastically pressing the lock hook in the direction of the lock groove is provided between the lock hook and the second rotating seat.

[0012] In order to further solve the technical problem to be solved by the utility model, the utility model provides a baby carriage folding structure, wherein the unlocking mechanism includes an unlocking button rotatably connected to the upper part of the upper rod, and a first traction rope connected between the unlocking button and the lock hook; when the unlocking button is pressed, the unlocking button pulls the first traction rope upward, thereby driving the lock hook to disengage from the lock slot; a third elastic reset member is provided between the unlocking button and the upper rod for elastically pressing the unlocking button outward.

[0013] In order to further solve the technical problem to be solved by the utility model, in a baby carriage folding structure provided by the utility model, a second elastic reset member for elastically pressing the rotating shaft in the upper rod direction is provided between the rotating shaft and the limiting hole.

[0014] In order to further solve the technical problem to be solved by the utility model, in a baby carriage folding structure provided by the utility model, a spring positioning bead structure for positioning the lower rod and the upper rod when they are folded or unfolded is provided between the first rotating seat and the second rotating seat.

[0015] In order to further solve the technical problem to be solved by the utility model, the utility model provides a baby carriage folding structure, wherein the frame assembly includes a front frame, a rear frame and a connecting rod, the lower end of the front frame is provided with a front wheel, the lower end of the rear frame is provided with a rear wheel, the whole vehicle folding structure includes a second rotating joint arranged between the upper end of the front frame and the lower end of the lower rod, and a second joint lock arranged at the second rotating joint and used to limit its rotation, a linkage structure is provided between the second joint lock and the upper rod, which can unlock the second joint lock as the upper rod rotates, and the middle part of the front frame and the middle part of the rear frame are rotatably connected together, one end of the connecting rod is rotatably connected to the lower rod, and the other end of the connecting rod is rotatably connected to the rear frame.

[0016] In order to further solve the technical problem to be solved by the utility model, the utility model provides a baby carriage folding structure, in which the second rotating joint includes a third rotating seat arranged at the lower end of the lower rod, and a fourth rotating seat arranged at the upper end of the front frame and rotatably connected to the third rotating seat, the second joint lock includes a lock slider slidably connected to the third rotating seat, a protrusion arranged on the lock slider, and a groove arranged on the inner side wall of the fourth rotating seat; and when the lower rod is fully unfolded relative to the front frame, the protrusion can be inserted into the groove and limit the rotation of the two; a fourth elastic reset member is provided between the lock slider and the third rotating seat, which elastically presses the lock slider in the direction of the groove.

[0017] In order to further solve the technical problem to be solved by the utility model, in a baby carriage folding structure provided by the utility model, the linkage structure includes a second traction rope arranged between the lock slider and the second rotating seat, and when the second rotating seat rotates in the folding direction, the second traction rope is pulled upward, thereby causing the protrusion on the lock slider to disengage from the groove.

[0018] In order to further solve the technical problem to be solved by the utility model, in a baby stroller folding structure provided by the utility model, a first elastic pulling member is provided at the lower end of the front frame and the lower end of the rear frame, and a second elastic pulling member is provided between the upper end of the rear frame and the upper end of the upper rod.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. In the present invention, in order to enhance the stability of the connection between the first rotating seat and the second rotating seat and further prevent the two from accidentally rotating, the first rotating seat and the second rotating seat are movably connected (both rotating and sliding), and a plug-in structure is provided between the two to limit the rotation of the two after the two are plugged in. When the first joint lock is unlocked, relative rotation does not occur immediately between the first rotating seat and the second rotating seat. The user must first pull up the upper rod to disengage the plug-in structure between the first rotating seat and the second rotating seat before relative rotation between them can be achieved. This design ensures that the push rod assembly will not cause unnecessary rotation due to accidental operation after it is fully deployed, further ensuring safety and stability.

[0021] 2. In the first joint lock of the utility model, the lower rod and the upper rod can be folded. In order to ensure the stability of the push rod assembly in the unfolded state and avoid relative movement between the two, in one scheme of the utility model, a lock hook type push rod folding structure is designed between the lower rod and the upper rod, that is, a lock groove is provided on the first rotating seat, and a lock hook is rotatably connected to the second rotating seat. The lock groove is used to accommodate and fix the lock hook when the push rod is unfolded. The lock hook can be hooked in the lock groove, thereby realizing the locking of the push rod assembly. Such a design not only simplifies the folding and unfolding operation of the push rod, but also ensures the stability and safety of the push rod in the unfolded state. The user only needs to easily operate the unlocking mechanism to realize the rapid folding or unfolding of the push rod, which greatly improves the convenience and efficiency of use.

[0022] 3. In addition, in order to further improve the positioning accuracy and stability of the push rod assembly during folding and unfolding, the utility model also designs a spring positioning bead structure between the first rotating seat and the second rotating seat. When the push rod assembly is folded or unfolded, the spring positioning bead structure can provide an additional positioning function. This structure pushes the positioning bead into the corresponding groove or hole through the elastic force of the spring, and also provides a "click" sound feedback, thereby achieving accurate positioning of the push rod assembly.

[0023] 4. In the baby stroller folding structure of the present invention, the design of the linkage structure is the key to ensure the convenience of operation of the whole stroller during folding. This structure enables the rotation of the upper rod to automatically unlock the second joint lock, thereby simplifying the folding process and improving the user experience. When the user rotates the upper rod, the second traction rope is pulled, causing the lock slider to slide on the third rotating seat, causing the protrusion to disengage from the groove of the fourth rotating seat, unlocking the second rotating joint, allowing the lower rod and the front frame to rotate relative to each other, thereby realizing the folding of the baby stroller.

[0024] 5. The design of the first elastic pull piece and the second elastic pull piece makes the baby stroller smoother when folding and the operation is simpler and more intuitive. During use, the user can not only complete the operation easily, but also feel the sense of security and stability brought by the structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 is an exploded schematic diagram of a push rod assembly of Embodiment 1;

[0028] Figure 3 is a cross-sectional view of a push rod assembly of Embodiment 1;

[0029] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0030] Figure 5 is a schematic diagram of the plug-in structure between the first rotating seat and the second rotating seat in the first embodiment;

[0031] Figure 6 yes Figure 3 A partial enlarged view of point B in the middle;

[0032] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle;

[0033] Figure 8 is a schematic structural diagram of the upper end of the second traction rope in the first embodiment;

[0034] Figure 9-12 This is a schematic diagram of the folding process of the first embodiment;

[0035] Fig.13 It is a structural schematic diagram of the first joint lock in the second embodiment. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Embodiment 1:

[0038] like Figures 1 to 12 The first embodiment of the utility model is shown, which is a baby stroller folding structure, including a frame assembly and a push rod assembly, wherein a whole vehicle folding structure is arranged between the two, so as to realize convenient folding and unfolding of the baby stroller. The push rod assembly includes a lower rod 1 and an upper rod 2, and a push rod folding structure is arranged between the two. The push rod folding structure is provided with a first rotating joint between the upper end of the lower rod 1 and the lower end of the upper rod 2. The design of the first rotating joint is intended to simplify the folding and unfolding operation of the push rod and enhance the user experience.

[0039] The first rotary joint includes a first rotary seat 11 disposed at the upper end of the lower rod 1, and a second rotary seat 21 disposed at the lower end of the upper rod 2. The first rotary seat 11 is fixed to the upper end of the lower rod 1 and serves as the basis of the entire joint structure. The second rotary seat 21 is fixed to the lower end of the upper rod 2 and is connected to the first rotary seat 11 through a movable connection, so that the upper rod 2 can rotate around the first rotary seat 11.

[0040] The structure of the active connection here is as follows:

[0041] In order to realize the movable connection between the first rotating seat 11 and the second rotating seat 21, the specific design is as follows: the first rotating seat 11 is provided with a rotating shaft 12, and the second rotating seat 21 is provided with a strip-shaped limiting hole 212 extending along the length direction of the upper rod 2. The rotating shaft 12 is inserted into the limiting hole 212 and can slide and rotate therein, thereby realizing the movable connection between the first rotating seat 11 and the second rotating seat 21. This movable connection can not only realize the relative rotation between the two rotating seats, which is a necessary function of the folding push rod assembly, but also realize the plugging and unplugging between them, which is necessary for unlocking the plug-in structure.

[0042] In order to ensure the position stability of the rotating shaft 12 in the limiting hole 212 and to automatically reset after the operation is completed, a second elastic reset member 13 (preferably a spring) is provided between the rotating shaft 12 and the limiting hole 212. The second elastic reset member 13 plays a role in elastically pressing the rotating shaft 12 in the structure, so that it can always maintain appropriate elastic force during the operation, thereby ensuring the connection stability between the first rotating seat 11 and the second rotating seat 21.

[0043] It is worth noting that a plug-in structure is provided between the first rotating seat 11 and the second rotating seat 21 to limit the rotation of the two after the two are plugged in, and a first joint lock is provided to lock the two to limit the relative rotation or relative movement of the two along the length direction of the lower rod 1.

[0044] In this embodiment, the first joint lock is used to limit the relative movement of the first rotating seat 11 and the second rotating seat 21 along the length direction of the lower rod 1, and the first joint lock is preferably a lock hook and lock groove structure. The plug-in structure is to limit the rotation between the first rotating seat 11 and the second rotating seat 21, wherein the plug-in structure is unlocked by lifting the upper rod 2. The lock hook and lock groove structure is to limit the upward movement of the upper rod 2, thereby limiting the unlocking of the plug-in structure. Therefore, to complete the folding of the push rod assembly, the lock hook and lock groove structure must be unlocked first, and then the upper rod 2 must be lifted up, so that the first rotating seat 11 and the second rotating seat 21 can rotate. The following will be described in detail.

[0045] 1) The specific structure of the plug-in structure is as follows:

[0046] In order to further enhance the stability of the connection between the first rotating seat 11 and the second rotating seat 21 and further prevent the two from accidentally rotating, a plug-in structure is provided between the first rotating seat 11 and the second rotating seat 21 to limit the rotation of the two after the two are plugged in.

[0047] Specifically, the plug-in structure includes a first plug 112 disposed on the first rotating seat 11, and a second plug 211 disposed on the second rotating seat 21 and capable of plugging and matching with the first plug 112. When the push rod assembly is in the unfolded state, the first plug 112 and the second plug 211 are tightly plugged, so that the relative rotation between the first rotating seat 11 and the second rotating seat 21 is restricted.

[0048] 2) The first joint lock (lock hook and lock slot structure) is as follows:

[0049] In order to ensure the stability of the push rod in the unfolded state and prevent the upper rod 2 from axial movement, a locking groove 111 is provided on the first rotating seat 11, and a locking hook 22 is rotatably connected to the second rotating seat 21. The locking groove is used to accommodate and fix the locking hook 22 when the push rod is unfolded, and the locking hook can be hooked in the locking groove 111, thereby locking the push rod assembly.

[0050] The design of the lock hook 22 also includes an unlocking mechanism (described in detail later), which is connected to the lock hook 22 and can drive the lock hook 22 to disengage from the lock slot 111 to facilitate the folding operation of the push rod. In addition, in order to ensure that the lock hook 22 can automatically return to its original position and lock when the push rod is unfolded, a first elastic reset member 23 (preferably a spring) is provided between the lock hook 22 and the second rotating seat 21. The elastic reset member 23 can elastically press the lock hook 22 in the direction of the lock slot 111, so that when the push rod is unfolded, the lock hook 22 can automatically hook into the lock slot 111 to achieve automatic locking.

[0051] Through the above structural design, the stroller folding structure provided by the utility model not only simplifies the folding and unfolding operation of the push rod, but also ensures the stability and safety of the push rod in the unfolded state. The user only needs to easily operate the unlocking mechanism to realize the rapid folding or unfolding of the push rod, which greatly improves the convenience and efficiency of use.

[0052] Furthermore, the upper part of the lock hook 22 is connected to the second rotating seat 21 by a hinged connection, and this connection mode allows the lock hook 22 to swing freely along the length direction of the upper rod 2. And the lower end of the lock hook 22 is provided with a hook tip 221 that can be inserted into the lock slot 111. The design of this hook tip enables it to be accurately inserted and fixed in the lock slot 111 on the first rotating seat 11. When the push rod assembly is unfolded, the hook tip 221 will automatically slide into the lock slot 111, and the push rod is stably locked through the swing of the lock hook 22 and the shape of the hook tip 221. This locking mechanism ensures the firmness of the push rod in the unfolded state and prevents accidental folding during use.

[0053] In order to facilitate user operation, the utility model also designs a simple and effective unlocking mechanism. The unlocking mechanism includes an unlocking button 3 installed on the upper part of the upper rod 2, and a first traction rope 31 connected between the unlocking button 3 and the lock hook 22. When the user needs to fold the push rod, he only needs to press the unlocking button 3, and the unlocking button 3 will pull the first traction rope 31 upward, and the locking hook 22 is driven out of the lock slot 111 by the pulling force of the traction rope. This process is simple and quick, which greatly improves the convenience of operation.

[0054] In order to ensure that the unlocking button 3 can automatically reset when not pressed, a third elastic reset member 32 (preferably a spring) is provided between the unlocking button 3 and the upper rod 2. This elastic reset member can elastically press the unlocking button 3 outwards, so that it automatically returns to its original position after the user releases the button, ready for the next operation.

[0055] It is worth noting that when the lock hook 22 is disengaged from the lock slot 111, the first rotating seat 11 and the second rotating seat 21 do not immediately rotate relative to each other. The user must first pull the upper rod 2 upward to disengage the plug-in structure between the first rotating seat 11 and the second rotating seat 21 before they can rotate relative to each other. This design ensures that after the push rod assembly is fully deployed, it will not cause unnecessary rotation due to accidental operation, further ensuring safety and stability.

[0056] In addition, in order to further improve the positioning accuracy and stability of the push rod assembly during folding and unfolding, the utility model also designs a spring positioning bead structure 14 between the first rotating seat 11 and the second rotating seat 21. When the push rod assembly is folded or unfolded, the spring positioning bead structure 14 can provide an additional positioning function. This structure pushes the positioning bead into the corresponding groove or hole through the elastic force of the spring, and also provides a "click" sound feedback, thereby achieving accurate positioning of the push rod assembly.

[0057] In the baby carriage folding structure of the present invention, the frame assembly includes a front frame 4, a rear frame 5 and a connecting rod 6. The lower rod 1, the front frame 4, the rear frame 5 and the connecting rod 6 actually form a four-bar linkage. A second rotation joint is provided between the upper end of the front frame 4 and the lower end of the lower rod 1. In addition, the middle part of the front frame 4 and the middle part of the rear frame 5 are connected together by rotation, one end of the connecting rod 6 is rotationally connected to the lower rod 1, and the other end is rotationally connected to the rear frame 5. This design not only provides additional structural support, but also ensures that the various components can move in a coordinated manner during the folding process of the baby carriage, reducing the difficulty of operation.

[0058] Of course, a front wheel 41 is provided at the lower end of the front frame 4 , and a rear wheel 51 is provided at the lower end of the rear frame 5 .

[0059] The design of the folding structure of the whole vehicle further enhances the portability and operability of the baby stroller. Specifically, the folding structure of the whole vehicle includes a second rotation joint provided between the upper end of the front frame 4 and the lower end of the lower rod 1, and a second joint lock provided at the second rotation joint and used to limit its rotation. This design ensures that when the baby stroller is unfolded, the frame assembly can be stably fixed in the unfolded position, and can be easily operated when it needs to be folded.

[0060] More specifically, the design of the second rotating joint is the key to ensuring the stability of the whole stroller during the unfolding and folding process. The second rotating joint includes a third rotating seat 15 provided at the lower end of the lower rod 1, and a fourth rotating seat 42 provided at the upper end of the front frame 4 and rotatably connected to the third rotating seat 15. This design allows the lower rod 1 and the front frame 4 to achieve relative rotation, thereby providing the necessary flexibility when the stroller needs to be folded.

[0061] The design of the second joint lock further enhances the stability of the baby carriage in the unfolded state. The second joint lock includes a lock slider 151 slidably connected to the third rotating seat 15, a protrusion 1511 provided on the lock slider 151, and a groove 421 provided on the inner wall of the fourth rotating seat 42. When the baby carriage is fully unfolded, the protrusion 1511 can be inserted into the groove 421. This mechanism effectively limits the rotation between the third rotating seat 15 and the fourth rotating seat 42, ensuring the stability of the baby carriage in the unfolded state.

[0062] In order to ensure the effective operation of the second joint lock, a fourth elastic reset member 16 (preferably a spring) is provided between the lock slider 151 and the third rotating seat 15. This elastic reset member elastically presses the lock slider 151 in the direction of the groove 421, so that the protrusion 1511 can be tightly inserted into the groove 421, thereby providing the necessary locking force when the baby carriage is unfolded. When the baby carriage needs to be folded, the user only needs to apply appropriate force to move the lock slider 151, and the protrusion 1511 will be disengaged from the groove 421, unlocking the second rotating joint and allowing the lower rod 1 and the front frame 4 to rotate relative to each other.

[0063] In the baby stroller folding structure of the present invention, the design of the linkage structure is the key to ensure the convenience of operation during the folding process of the whole stroller. This structure enables the rotation of the upper rod 2 to automatically unlock the second joint lock, thereby simplifying the folding process and improving the user experience.

[0064] Specifically, the linkage structure includes a second traction rope 24 disposed between the lock slider 151 and the second rotating seat 21. This design allows the rotation of the upper rod 2 to be transmitted to the lock slider 151 through the second traction rope 24, thereby realizing the automatic unlocking of the second joint lock. When the user rotates the upper rod 2, the second traction rope 24 is pulled, causing the lock slider 151 to slide on the third rotating seat 15, causing the protrusion 1511 to disengage from the groove 421 of the fourth rotating seat 42, unlocking the second rotating joint, allowing the lower rod 1 and the front frame 4 to rotate relative to each other, thereby realizing the folding of the baby carriage.

[0065] like Figure 2 , Figure 8 As shown, a slider head is provided at the upper end of the second traction rope 24, and a U-shaped or L-shaped guide groove 213 is provided on the second rotating seat 21, and the slider head is slidably connected in the guide groove 211. The second traction rope 24 is pulled only when the second rotating seat 21 rotates in the folding direction. When the second rotating seat 21 rotates in the folding direction, the second traction rope 24 is pulled, so that the protrusion 1511 on the lock slider 151 is disengaged from the groove 421, and the second joint lock is unlocked.

[0066] In the baby stroller folding structure of the present invention, the design of the first elastic pull member 7 and the second elastic pull member 8 greatly enhances the convenience and automation of the baby stroller during folding. These elastic pull members utilize their own elastic properties to automatically assist in folding the frame assembly when the baby stroller is unlocked, thereby reducing the effort required by the user when folding the stroller.

[0067] Specifically, the first elastic pull member 7 is arranged between the lower end of the front frame 4 and the lower end of the rear frame 5, and is preferably an elastic band arranged at the storage net at the bottom of the baby stroller. When the baby stroller is unlocked, the elastic force of the first elastic pull member 7 will automatically pull the front frame 4 and the rear frame 5 together. This design not only simplifies the folding process, but also ensures the stability and consistency of the frame assembly when folding.

[0068] Similarly, the second elastic pull member 8 is arranged between the upper end of the rear frame 5 and the upper end of the upper rod 2, and is preferably an elastic band arranged at the seat pocket and the handle. When the push rod assembly is unlocked, the elastic force of the second elastic pull member 8 will automatically pull the upper rod 2 downward and fold it. This design further simplifies the folding operation, so that the user only needs to perform a simple unlocking action to achieve automatic folding of the baby stroller.

[0069] Of course, in addition to the second elastic pulling member 8, when the push rod assembly is unlocked (unlocking means: the lock hook 22 is disengaged from the lock slot 111, and the first plug 112 is disengaged from the second plug 211), the upper rod 2 will also automatically retract toward the lower rod 1 under the action of its own weight, which simplifies the vehicle folding operation, saves the force required for folding the vehicle, and increases the degree of automation.

[0070] Through the above design, the baby stroller folding structure of the present invention greatly improves the convenience and stability of use while ensuring functionality.

[0071] The folding process of the whole vehicle of the utility model is as follows: Figures 9 to 12 The figure shows in detail how to convert the vehicle from the unfolded state to the compact folded state. The following are the detailed steps of the folding process:

[0072] 1) Unlocking operation: First, the user needs to press the unlocking button 3 on the vehicle. This operation causes the lock hook 22 to disengage from the lock slot 111, thereby releasing the locking state between the upper rod 2 and the lower rod 1.

[0073] 2) Separation of plugs: After unlocking, the user needs to pull the upper rod 2 forward and upward. During this process, the first plug 112 will be separated from the second plug 211, which is a key step in the folding process, ensuring that the upper rod 2 can be freed from restrictions and rotate freely.

[0074] 3) Rotation and folding: Next, the user needs to rotate the upper rod 2 forward to gradually fold it to the position of the lower rod 1. During this rotation process, the linkage structure will automatically work to unlock the second rotation joint, so that the lower rod 1 and the front frame 4 are also freed from restrictions and can rotate freely.

[0075] 4) Folding of the four-bar linkage: Finally, the user folds the upper rod 2 and the lower rod 1 backwards at the same time. In this step, the four-bar linkage consisting of the front frame 4, the rear frame 5, the connecting rod 6 and the lower rod 1 will be folded at the same time. This design cleverly utilizes the characteristics of the four-bar linkage, so that the structure of the entire vehicle can be compactly folded, which is convenient for carrying and storage.

[0076] Through this series of steps, the vehicle of the utility model can be quickly converted from the use state to the folded state, which is not only easy to operate, but also has a small volume after folding, which is very suitable for carrying and storage. This design greatly improves the portability and practicality of the vehicle and meets the user's demand for convenient travel.

[0077] Embodiment 2:

[0078] like Fig.13What is shown is embodiment 2 of the utility model, which is different from the above-mentioned embodiment 1 in that, in this embodiment, the first joint lock is used to limit the relative rotation of the first rotating seat 11 and the second rotating seat 21, and the first joint lock includes a long lock tongue 25 that is slidably connected to the second rotating seat 21 along its length direction, and a slot 17 provided in the first rotating seat 11 and into which the long lock tongue 25 can be inserted, and the long lock tongue 25 is connected to an unlocking mechanism that can drive the long lock tongue 25 to disengage from the slot 17, and a first elastic reset member 23 is provided between the long lock tongue 25 and the second rotating seat 21 to elastically press the long lock tongue 25 in the direction of the slot 17.

[0079] More importantly, the travel of the long lock tongue 25 when it is disengaged from the slot 17 is greater than the travel of the rotating shaft 12 in the limiting hole 212. In this way, without disengaging the long lock tongue 25 and the slot 17, even if the upper rod 2 is pulled up to disengage the first plug 112 from the second plug 211, the long lock tongue 25 will not disengage from the slot 17 and will remain locked.

[0080] In this embodiment, by pressing the button 3 and pulling up the upper rod 2 at the same time, the long locking tongue 25 will completely disengage from the slot 17, and the first plug 112 will also disengage from the second plug 211, and the push rod assembly can be folded at this time.

Claims

1. A baby carriage folding structure, characterized in that: The invention comprises a frame assembly and a push rod assembly, and a whole vehicle folding structure is arranged between the two. The push rod assembly comprises a lower rod (1) and an upper rod (2), and a push rod folding structure is arranged between the two. The push rod folding structure comprises a first rotating joint arranged between the upper end of the lower rod (1) and the lower end of the upper rod (2). The first rotating joint comprises a first rotating seat (11) arranged at the upper end of the lower rod (1), and a second rotating seat (21) arranged at the lower end of the upper rod (2). The first rotating seat (11) is provided with a rotating shaft (12). The second rotating seat (21) is provided with a strip-shaped limiting hole (212) extending along the length direction of the upper rod (2), and the rotating shaft (12) is inserted into the limiting hole (212) and can slide and rotate therein; a plug-in structure is provided between the first rotating seat (11) and the second rotating seat (21) to limit the rotation of the two after the two are plugged in, and a first joint lock is also provided between the first rotating seat (11) and the second rotating seat (21) for locking the two so as to limit the relative rotation of the two or the relative movement along the length direction of the lower rod (1).

2. A baby stroller folding structure according to claim 1, characterized in that: The plug-in structure comprises a first plug (112) arranged on a first rotating seat (11), and a second plug (211) arranged on a second rotating seat (21) and capable of plugging and matching with the first plug (112).

3. The baby stroller folding structure according to claim 1, characterized in that: The first joint lock is used to limit the relative movement of the first rotating seat (11) and the second rotating seat (21) along the length direction of the lower rod (1), and the first joint lock comprises a locking groove (111) provided on the first rotating seat (11), a locking hook (22) rotatably connected to the second rotating seat (21) and capable of hooking in the locking groove (111), the locking hook (22) is connected to an unlocking mechanism capable of driving the locking hook (22) to disengage from the locking groove (111), and a first elastic reset member (23) is provided between the locking hook (22) and the second rotating seat (21) for elastically pressing the locking hook (22) in the direction of the locking groove (111).

4. A baby carriage folding structure according to claim 3, characterized in that: The unlocking mechanism comprises an unlocking button (3) rotatably connected to the upper part of the upper rod (2), and a first pulling rope (31) connected between the unlocking button (3) and the lock hook (22); when the unlocking button (3) is pressed, the unlocking button (3) pulls the first pulling rope (31) upwards, thereby driving the lock hook (22) to disengage from the lock slot (111); a third elastic return member (32) is provided between the unlocking button (3) and the upper rod (2) for elastically pressing the unlocking button (3) outwards.

5. The baby stroller folding structure according to claim 1, characterized in that: A second elastic reset member (13) is provided between the rotating shaft (12) and the limiting hole (212) for elastically pressing the rotating shaft (12) in the direction of the upper rod (2).

6. The baby stroller folding structure according to claim 1, characterized in that: A spring positioning bead structure (14) is provided between the first rotating seat (11) and the second rotating seat (21) for positioning the lower rod (1) and the upper rod (2) when they are folded or unfolded.

7. The baby stroller folding structure according to claim 1, characterized in that: The frame assembly comprises a front frame (4), a rear frame (5) and a connecting rod (6); a front wheel (41) is provided at the lower end of the front frame (4); a rear wheel (51) is provided at the lower end of the rear frame (5); the whole vehicle folding structure comprises a second rotating joint arranged between the upper end of the front frame (4) and the lower end of the lower rod (1); and a second joint lock arranged at the second rotating joint and used for limiting the rotation thereof; a linkage structure is provided between the second joint lock and the upper rod (2) and can unlock the second joint lock as the upper rod (2) rotates; the middle part of the front frame (4) and the middle part of the rear frame (5) are rotatably connected together; one end of the connecting rod (6) is rotatably connected to the lower rod (1), and the other end of the connecting rod (6) is rotatably connected to the rear frame (5).

8. The baby carriage folding structure according to claim 7, characterized in that: The second rotating joint comprises a third rotating seat (15) arranged at the lower end of the lower rod (1), and a fourth rotating seat (42) arranged at the upper end of the front frame (4) and rotatably connected to the third rotating seat (15); the second joint lock comprises a locking slider (151) slidably connected to the third rotating seat (15), a protrusion (1511) arranged on the locking slider (151), and a groove (421) arranged on the inner side wall of the fourth rotating seat (42); and when the lower rod (1) is fully unfolded relative to the front frame (4), the protrusion (1511) can be inserted into the groove (421) and limit the rotation of the two; a fourth elastic reset member (16) is provided between the locking slider (151) and the third rotating seat (15) for elastically pressing the locking slider (151) in the direction of the groove (421).

9. The baby carriage folding structure according to claim 8, characterized in that: The linkage structure comprises a second traction rope (24) arranged between the locking slider (151) and the second rotating seat (21), and when the second rotating seat (21) rotates in the folding direction, the second traction rope (24) is pulled upward, thereby causing the protrusion (1511) on the locking slider (151) to disengage from the groove (421).

10. The baby carriage folding structure according to claim 7, characterized in that: A first elastic pulling member (7) is provided at the lower end of the front frame (4) and the lower end of the rear frame (5), and a second elastic pulling member (8) is provided between the upper end of the rear frame (5) and the upper end of the upper rod (2).

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