Folding baby carriage frame and baby carriage

Abstract

The utility model discloses a folding baby carriage frame and a baby carriage, and relates to the field of baby carriages. According to the technical scheme, the wheelchair comprises two lower folding joints, a push rod mechanism, a front wheel mechanism, a rear wheel mechanism and a seat plate mechanism; the lower folding joint comprises a lower joint base and a lower joint rotating part; the push rod mechanism comprises a lower push rod, an upper push rod and an upper folding joint arranged between the lower push rod and the upper push rod; the seat plate mechanism comprises a front seat plate rotationally connected with the front wheel mechanism, a rear seat plate rotationally connected with the rear wheel mechanism and a seat plate pivoting part arranged between the front seat plate and the rear seat plate; and a connecting rod is arranged between the lower joint rotating part and the seat plate pivoting part. The lower folding joint is unlocked through rotation of the upper push rod, the protective fence is unlocked through rotation of the lower push rod, the folding action and unlocking are alternately carried out, and automatic folding of the frame is achieved through gravity; therefore, the structure can be simplified, operation is convenient, and user experience is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of baby carriage, more specifically, it relates to a folding baby carriage frame and baby carriage. BACKGROUND

[0002] In order to facilitate storage and preservation, the current baby carriage usually adopts foldable structure.

[0003] The Chinese patent with the authorization announcement number CN217198315U discloses a gravity automatic folding baby carriage frame, after the upper push rod assembly and the lower push rod assembly are unlocked, the lower push rod assembly rotates downward to drive the upper push rod assembly to rotate, the upper push rod assembly drives the push rod support rod assembly to rotate, the push rod support rod assembly drives the basket frame rod connecting piece to move upward and rotates the connected rear basket frame rod assembly to the rear support assembly direction, the rear basket frame rod assembly drives the front basket frame rod assembly and rotates the connected front support assembly to the rear support assembly direction, the push rod support rod assembly drives the front handrail assembly and rotates the connected front handrail support rod assembly to the rear support assembly direction, the front handrail support rod assembly drives the rear seat rod assembly to rotate to the front seat rod assembly direction, so that each assembly is folded and stored.

[0004] Although the baby carriage frame in the above-mentioned patent can realize automatic folding by using gravity, the structure is relatively complex, the folding transmission path is relatively long, and the weight of the baby carriage frame is usually small when designed, so manual assistance is often needed when folding, which affects the user experience, and the long transmission path is prone to failure. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, one of the purposes of the utility model is to provide a folding baby carriage frame, which realizes unlocking by using rotation in the folding process, realizes folding and unlocking at the same time, and continues to fold after unlocking, so that the folding linkage structure can be reduced, the transmission path can be shortened, the folding can be smoothly and stably performed, the probability of failure can be reduced, and the user experience can be optimized.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A folding baby carriage frame, comprising two lower folding joints, a push rod mechanism, a front wheel mechanism, a rear wheel mechanism and a seat plate mechanism.

[0008] The lower folding joint comprises a lower joint base and a lower joint rotating part, and the lower joint base is respectively provided with a first extension part fixedly connected with the rear wheel mechanism and a second extension part rotationally connected with the front wheel mechanism.

[0009] The push rod mechanism comprises a lower push rod, an upper push rod and an upper folding joint arranged between the lower push rod and the upper push rod.

[0010] The lower joint rotating part is provided with a third extension part fixedly connected with the lower push rod;

[0011] The seat plate mechanism comprises a front seat plate rotationally connected with the front wheel mechanism, a rear seat plate rotationally connected with the rear wheel mechanism, and a seat plate pivoting part arranged between the front seat plate and the rear seat plate;

[0012] A connecting rod is arranged between the lower joint rotating part and the seat plate pivoting part;

[0013] The upper push rod is provided with a folding unlocking switch acting on an upper folding joint for unlocking a lower folding joint;

[0014] The upper push rod is rotated around the upper folding joint to realize folding of the upper push rod and the lower push rod after the upper folding joint is unlocked by the folding unlocking switch; the lower folding joint is unlocked by the upper folding joint after the upper push rod is rotated, so that the folded upper push rod and the lower push rod are rotated around the lower folding joint under the action of gravity and drive the front wheel mechanism and the seat plate mechanism to fold.

[0015] Further, a first rotating shaft is arranged between the front seat plate and the front wheel mechanism, and a second rotating shaft is arranged between the rear seat plate and the rear wheel mechanism.

[0016] Further, a fourth extension part is arranged on the seat plate pivoting part and rotationally connected with one end of the connecting rod, and a fifth extension part is arranged on the lower joint rotating part and rotationally connected with the other end of the connecting rod.

[0017] Further, the frame further comprises a protective fence; and the lower folding joint further comprises a lower joint end cover connected with the protective fence.

[0018] A first locking block is arranged in the lower joint end cover, and an elastic member acting on the first locking block is arranged; a limiting hole is arranged in the lower joint rotating part, one end of the first locking block is embedded into the limiting hole under the action of the elastic force; a second locking block in contact with the end of the first locking block is further arranged in the limiting hole, and the end of the second locking block away from the first locking block is embedded into the lower joint base;

[0019] When the lower joint rotating part rotates relative to the lower joint base, the second locking block is extruded and moves in a direction away from the lower joint base, the second locking block drives the first locking block to move out of the limiting hole, so that the lower joint end cover can rotate relative to the lower joint rotating part, and folding of the protective fence is realized.

[0020] Further, a locking groove matched with the second locking block is arranged in the lower joint base, and a driving inclined surface is arranged between the second locking block and the locking groove.

[0021] Further, a first unlocking cable is arranged between the folding unlocking switch and the upper folding joint, and a second unlocking cable is arranged between the upper folding joint and the lower folding joint.

[0022] Further, the upper folding joint comprises an upper joint rotating part connected with the upper push rod, an upper joint base connected with the lower push rod, and a first limiting tooth arranged between the upper joint rotating part and the upper joint base; the upper joint rotating part and the upper joint base are respectively provided with a first tooth groove and a second tooth groove matched with the first limiting tooth;

[0023] The upper joint rotating part is provided with a first rotating push block in contact with the first limiting tooth; one end of the first unlocking cable is connected with the first rotating push block, and the other end is connected with the folding unlocking switch;

[0024] The first limiting tooth comprises a first locking state of being embedded in the first tooth groove and the second tooth groove at the same time, and a first unlocking state of being embedded in the second tooth groove;

[0025] The folding unlocking switch drives the first rotating push block to rotate through the first unlocking cable, the first rotating push block moves axially while rotating, and drives the first limiting tooth to move, so that the first limiting tooth switches from the first locking state to the first unlocking state, and the upper joint rotating part can rotate.

[0026] Further, the upper joint base is provided with a positioning ring, the positioning ring is provided with a cable positioning block extending axially into the first tooth groove, one end of the second unlocking cable is connected with the cable positioning block; the first tooth groove is provided with a driving boss matched with the cable positioning block;

[0027] The driving boss rotates with the upper joint rotating part, the driving boss rotates to contact the cable positioning block and drive the cable positioning block to rotate, and the cable positioning block drives the lower folding joint to unlock through the second unlocking cable.

[0028] Further, the lower folding joint further comprises a second limiting tooth arranged between the lower joint base and the lower joint rotating part;

[0029] The lower joint rotating part and the lower joint base are respectively provided with a third tooth groove and a fourth tooth groove matched with the second limiting tooth;

[0030] The second limiting tooth comprises a second locking state of being embedded in the third tooth groove and the fourth tooth groove at the same time, and a second unlocking state of being embedded in the fourth tooth groove;

[0031] The lower joint rotating part is provided with a second rotating push block in contact with the second limiting tooth, and one end of the second rotating push block is connected with the second unlocking cable;

[0032] The second unlocking cable drives the second rotating push block to rotate, the second rotating push block moves along the axial direction while rotating, and drives the second limiting tooth to move, so that the second limiting tooth is switched from the second locking state to the second unlocking state.

[0033] Another purpose of the utility model is to provide a folding baby carriage frame.

[0034] In summary, the utility model has the following beneficial effects:

[0035] 1. First, the unlocking and rotation folding of the upper push rod are performed, then the unlocking of the lower folding joint is realized by the rotation of the upper push rod, one side folding and unlocking are realized, then the folding is continuously performed, so that the structure can be optimized, the transmission path can be shortened, the folding can be stably performed, the probability of failure can be reduced, and the user experience can be optimized.

[0036] 2. The linkage in the folding process is realized by the connecting rod, the first rotating shaft and the second rotating shaft, which is beneficial to shorten the transmission path, stably perform the folding, reduce the probability of failure, and improve the stability in the unfolded state.

[0037] 3. The lower folding joint is unlocked by the rotation of the upper push rod, and the protective fence is unlocked by the rotation of the lower push rod, the folding action and the unlocking are alternately performed, the gravity is utilized, and the automatic folding of the frame is realized, so that the structure can be simplified, the operation is facilitated, and the user experience is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 Structure diagram of the folding baby carriage frame in embodiment 1 Figure One ;

[0039] Figure 2 Structure diagram of the folding baby carriage frame in embodiment 1 Figure Two ;

[0040] Figure 3 Structure diagram of the folding baby carriage frame in embodiment 1 Figure Three ;

[0041] Figure 4 Structure diagram of the folding baby carriage frame in embodiment 1 Figure Four ;

[0042] Figure 5 Structure diagram of the seat plate mechanism in embodiment 1

[0043] Figure 6 Structure diagram of the upper folding joint in embodiment 1 Figure One ;

[0044] Figure 7Structure diagram of upper folding joint in embodiment 1 Figure Two ;

[0045] Figure 8 Structure diagram of lower folding joint in embodiment 1 Figure One ;

[0046] Figure 9 Structure diagram of lower folding joint in embodiment 1 Figure Two ;

[0047] Figure 10 Structure diagram of lower folding joint in embodiment 1 Figure Three .

[0048] In the figure: 1, lower folding joint; 11, lower joint base; 111, fourth tooth groove; 112, first extension; 113, second extension; 114, locking groove; 12, lower joint rotating part; 121, third tooth groove; 122, third extension; 123, fifth extension; 124, limiting hole; 13, second limiting tooth; 14, second rotating push block; 141, second unlocking cable; 15, lower joint end cover; 16, first locking block; 17, second locking block; 2, front wheel mechanism; 3, rear wheel mechanism; 41, lower push rod; 42, upper push rod; 43, upper folding joint; 431, upper joint base; 4311, second tooth groove; 432, upper joint rotating part; 4321, first tooth groove; 4322, driving boss; 433, first limiting tooth; 434, first rotating push block; 435, positioning ring; 436, cable positioning block; 44, folding unlocking switch; 5, seat plate mechanism; 51, front seat plate; 52, rear seat plate; 53, seat plate pivoting part; 54, fourth extension; 6, protective fence; 71, connecting rod; 72, first rotating shaft; 73, second rotating shaft. DETAILED DESCRIPTION

[0049] The utility model will be further explained in detail below in combination with the drawings.

[0050] The specific embodiment is only the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification without the creative contribution according to the need after reading the present specification, but as long as in the utility model's right claim range all receive the patent law's protection. Embodiment 1:

[0051] A folding stroller frame, refer to Figures 1 to 10It comprises two lower folding joints 1, a push rod mechanism, a front wheel mechanism 2, a rear wheel mechanism 3, a seat plate mechanism 5 and a protective fence 6; the lower folding joint 1 comprises a lower joint base 11 and a lower joint rotating part 12; the lower joint base 11 is respectively provided with a first extension part 112 fixedly connected with the rear wheel mechanism 3 and a second extension part 113 rotationally connected with the front wheel mechanism 2; that is, the rear wheel mechanism 3 is fixedly connected with the first extension part 112 on the two lower joint bases 11 respectively, and the front wheel mechanism 2 is rotationally connected with the second extension part 113 on the two lower joint bases 11 respectively; specifically, the support rod of the front wheel mechanism 2 and the second extension part 113 are rotationally connected through a rotating shaft in the embodiment.

[0052] With reference to Figures 1 to 10 The push rod mechanism comprises a lower push rod 41, an upper push rod 42 and an upper folding joint 43 arranged between the lower push rod 41 and the upper push rod 42; wherein the number of the lower push rod 41 is two, and the upper push rod 42 is in a U shape, so that the push rod mechanism as a whole is in a U shape; the lower joint rotating part 12 is provided with a third extension part 122 fixedly connected with the lower push rod 41; that is, the third extension part 122 and the upper folding joint 43 are respectively located at the two ends of the lower push rod 41.

[0053] With reference to Figures 1 to 10 The seat plate mechanism 5 comprises a front seat plate 51 rotationally connected with the front wheel mechanism 2, a rear seat plate 52 rotationally connected with the rear wheel mechanism 3 and a seat plate pivoting part 53 arranged between the front seat plate 51 and the rear seat plate 52; that is, the front seat plate 51 and the rear seat plate 52 are rotationally connected through the seat plate pivoting part 53; wherein the seat plate pivoting part 53 comprises two rotating parts, one of which is connected with the front seat plate and the other of which is connected with the rear seat plate; specifically, a first rotating shaft is arranged between the front seat plate 51 and the front wheel mechanism 2, so as to rotationally connect the front seat plate 51 and the front wheel mechanism 2; a second rotating shaft 73 is arranged between the rear seat plate 52 and the rear wheel mechanism 3, so as to rotationally connect the rear seat plate 52 and the rear wheel mechanism 3; the use of two rotating shafts to realize rotational connection can simplify the structure and improve stability.

[0054] With reference to Figures 1 to 10 A connecting rod 71 is arranged between the lower joint rotating part 12 and the seat plate pivoting part 53; specifically, the seat plate pivoting part 53 is provided with a fourth extension part 54 rotationally connected with one end of the connecting rod 71, and the lower joint rotating part 12 is provided with a fifth extension part 123 rotationally connected with the other end of the connecting rod 71; that is, a connecting rod transmission structure is formed between the fourth extension part 54, the connecting rod 71 and the fifth extension part 123.

[0055] With reference to Figures 1 to 10In the embodiment, the upper push rod 42 is provided with a folding unlocking switch 44 acting on the upper folding joint 43 for unlocking the lower folding joint 1. Specifically, in the unfolded state of the vehicle frame, the upper folding joint 43 is unlocked by the folding unlocking switch 44, and then the upper push rod 42 is rotated around the upper folding joint 43 to realize the folding of the upper push rod 42 and the lower push rod 41. After the rotation of the upper push rod 42, the lower folding joint 1 is unlocked by the upper folding joint 43, and then the folded upper push rod 42 and the lower push rod 41 are rotated around the lower folding joint 1 under the action of gravity. The lower push rod 41 drives the lower joint rotating part 12 to rotate, the lower joint rotating part 12 drives the connecting rod 71 to rotate, the connecting rod 71 drives the seat plate pivoting part 53 to rotate, cooperates with the first rotating shaft 72 and the second rotating shaft 73, and thus drives the front wheel mechanism 2 and the seat plate mechanism 5 to fold, and finally realizes the folding of the entire vehicle frame.

[0056] Referring to Figures 1 to 10 In the embodiment, the unlocking and rotation folding of the upper push rod 42 are first performed, and then the unlocking of the lower folding joint 1 is realized by the rotation of the upper push rod 42, which realizes folding while unlocking, and then continues to fold, so that the structure can be optimized, the transmission path can be shortened, the folding can be stably and smoothly performed, the probability of failure can be reduced, and the user experience can be optimized.

[0057] Referring to Figures 1 to 10 In the embodiment, the connecting rod 71, the first rotating shaft 72 and the second rotating shaft 73 are used to realize linkage during the folding process, which can shorten the transmission path, stably perform the folding, reduce the probability of failure, and also improve the stability in the unfolded state.

[0058] Referring to Figures 1 to 10 In the embodiment, the lower folding joint 1 further includes a lower joint end cover 15 connected with the protective fence 6. Specifically, the protective fence 6 is in a U shape, and two ends thereof are connected with two lower joint end covers 15 respectively. In the unfolded state, the lower joint end cover 15 is fixed relative to the lower joint base 11. In the folding, the lower joint end cover 15 is unlocked and then rotated to realize the folding.

[0059] Referring to Figures 1 to 10 Specifically, the lower joint end cover 15 is provided with a first locking block 16 and an elastic member acting on the first locking block 16. The lower joint rotating part 12 is provided with a limiting hole 124, and one end of the first locking block 16 is embedded into the limiting hole 124 under the action of the elastic force. The limiting hole 124 is further provided with a second locking block 17 in contact with the end of the first locking block 16, and the end of the second locking block 17 away from the first locking block 16 is embedded into the lower joint base 11. The lower joint base 11 is provided with a locking groove 114 cooperating with the second locking block 17, and a driving inclined surface is arranged between the second locking block 17 and the locking groove 114.

[0060] With reference to Figures 1 to 10 , when the lower joint rotating part 12 rotates relative to the lower joint base 11, the second locking block 17 is pressed and moves away from the lower joint base 11 under the action of the driving slope until it is disengaged from the locking groove 114; the second locking block 17 drives the first locking block 16 to move out of the limiting hole 124; that is, the second locking block 17 is located in the limiting hole 124, and the first locking block 16 is located in the lower joint end cover 15; then, the lower joint end cover 15 can rotate relative to the lower joint rotating part 12, and then under the action of gravity, the protective fence 6 is rotated to the folded state.

[0061] With reference to Figures 1 to 10 In this embodiment, the rotation of the upper push rod 42 is used to unlock the lower folding joint 1, and the rotation of the lower push rod 41 is used to unlock the protective fence 6. The folding action and the unlocking are alternately performed, and the gravity is used to realize the automatic folding of the frame; in this way, the structure can be simplified, the operation is convenient, and the user experience is optimized.

[0062] With reference to Figures 1 to 10 In this embodiment, the folding unlocking switch 44 and the upper folding joint 43 are provided with a first unlocking cable, and the upper folding joint 43 and the lower folding joint 1 are provided with a second unlocking cable 141; the first unlocking cable is arranged in the upper push rod 42, and the second unlocking cable 141 is arranged in the lower push rod 41.

[0063] With reference to Figures 1 to 10 When the folding unlocking switch 44 applies a pulling force to the first unlocking cable, the first unlocking cable unlocks the upper folding joint 43, and then the upper push rod 42 rotates counterclockwise around the upper folding joint 43, that is, the upper push rod 42 rotates downward, realizing the folding of the upper push rod 42 and the lower push rod 41; after the upper push rod 42 rotates, the upper folding joint 43 applies a pulling force to the second unlocking cable 141, and then the second unlocking cable 141 unlocks the lower folding joint 1; then, the folded upper push rod 42 and the lower push rod 41 rotate clockwise around the lower folding joint 1 under the action of gravity, that is, they rotate downward and close to the rear wheel mechanism 3; through the connecting rod 71, the first rotating shaft 72 and the second rotating shaft 73, the seat plate mechanism 5 is driven to fold and rotate, and the front wheel mechanism 2 is driven to rotate counterclockwise around the lower folding joint 1, so that the front wheel mechanism 2 is close to the rear wheel mechanism 3, thereby realizing folding.

[0064] With reference to Figures 1 to 10, specifically, the upper folding joint 43 in the embodiment comprises an upper joint rotating part 432 connected with the upper push rod 42, an upper joint base 431 connected with the lower push rod 41, and a first limiting tooth 433 arranged between the upper joint rotating part 432 and the upper joint base 431; the upper joint rotating part 432 and the upper joint base 431 are respectively provided with a first tooth groove 4321 and a second tooth groove 4311 matched with the first limiting tooth 433; the first limiting tooth 433 is axially movable and comprises a first locking state of being embedded in the first tooth groove 4321 and the second tooth groove 4311 at the same time, and a first unlocking state of being embedded in the second tooth groove 4311 only; a spring is arranged between the first limiting tooth 433 and the upper joint base 431, and the elastic force of the spring makes the first limiting tooth 433 have a tendency to move to the first locking state.

[0065] With reference to Figures 1 to 10 , the upper joint rotating part 432 is provided with a first rotating push block 434 in contact with the first limiting tooth 433, and a guide slope is arranged between the first rotating push block 434 and the upper joint rotating part 432; through the guide slope, the first rotating push block 434 moves axially relative to the upper joint rotating part 432 while rotating; one end of the first unlocking cable is connected with the first rotating push block 434, and the other end is connected with the folding unlocking switch 44; the folding unlocking switch 44 is used for applying tension to the first unlocking cable, and various structures in the prior art can be used, which will not be described here.

[0066] With reference to Figures 1 to 10 , the folding unlocking switch 44 drives the first rotating push block 434 to rotate through the first unlocking cable, the first rotating push block 434 moves axially while rotating and drives the first limiting tooth 433 to move, the first limiting tooth 433 moves out of the first tooth groove 4321 and is embedded in the second tooth groove 4311, then the first limiting tooth 433 switches from the first locking state to the first unlocking state, and then the upper joint rotating part 432 can rotate.

[0067] With reference to Figures 1 to 10 , the upper joint base 431 in the embodiment is provided with a positioning ring 435, the positioning ring 435 is provided with a cable positioning block 436 extending axially into the first tooth groove 4321, and one end of the second unlocking cable 141 is connected with the cable positioning block 436; the first tooth groove 4321 is provided with a driving boss 4322 matched with the cable positioning block 436; when the upper joint rotating part 432 rotates, the driving boss 4322 rotates with the upper joint rotating part 432, the driving boss 4322 rotates to contact the cable positioning block 436 and drives the cable positioning block 436 to rotate, the rotated cable positioning block 436 applies tension to the second unlocking cable 141, so as to drive the lower folding joint 1 to unlock through the second unlocking cable 141.

[0068] With reference toFigures 1 to 10 In the embodiment, the rotation of the upper joint rotating part 432 in the folding process is utilized to realize the unlocking of the lower folding joint 1, and the upper joint rotating part 432 functions as an unlocking switch of the lower folding joint 1. Such an arrangement can simplify the structure, save one unlocking operation, and optimize the user experience.

[0069] With reference to Figures 1 to 10 In the embodiment, the lower folding joint 1 further comprises a second limiting tooth 13 arranged between the lower joint base 11 and the lower joint rotating part 12. The lower joint rotating part 12 and the lower joint base 11 are respectively provided with a third tooth groove 121 and a fourth tooth groove 111 that cooperate with the second limiting tooth 13. The second limiting tooth 13 is axially movable and includes a second locking state in which the second limiting tooth 13 is embedded in both the third tooth groove 121 and the fourth tooth groove 111, and a second unlocking state in which the second limiting tooth 13 is embedded in only the fourth tooth groove 111. The lower joint rotating part 12 is provided with a second rotating push block 14 that contacts the second limiting tooth 13, and the second rotating push block 14 is connected to one end of a second unlocking cable 141. That is, one end of the second unlocking cable 141 is connected to the cable positioning block 436, and the other end is connected to the second rotating push block 14. A guide inclined surface is arranged between the second rotating push block 14 and the lower joint rotating part 12, and through the guide inclined surface, the second rotating push block 14 moves axially relative to the lower joint rotating part 12 while rotating.

[0070] With reference to Figures 1 to 10 When the cable positioning block 436 rotates, a pulling force is applied to the second unlocking cable 141, and the second unlocking cable 141 drives the second rotating push block 14 to rotate. The second rotating push block 14 moves axially while rotating and drives the second limiting tooth 13 to move. The second limiting tooth 13 moves out of the third tooth groove 121 and is embedded in the fourth tooth groove 111, and the second limiting tooth 13 switches from the second locking state to the second unlocking state. An elastic member is arranged between the second limiting tooth 13 and the lower joint base 11, and the elastic force of the elastic member causes the second limiting tooth 13 to have a tendency to move to the second locking state. Embodiment 2:

[0071] A stroller, with reference to ​ which comprises the folding stroller frame in embodiment 1.

Claims

1. A foldable stroller frame, characterized by: The folding bicycle comprises two lower folding joints, a push rod mechanism, a front wheel mechanism, a rear wheel mechanism and a seat plate mechanism. The lower folding joint comprises a lower joint base and a lower joint rotating part. The lower joint rotating part is provided with a third extension part fixedly connected with the lower push rod. The seat plate mechanism comprises a front seat plate rotatably connected with the front wheel mechanism, a rear seat plate rotatably connected with the rear wheel mechanism and a seat plate pivoting part arranged between the front seat plate and the rear seat plate. The lower joint rotating part and the seat plate pivoting part are provided with a connecting rod. The upper push rod is provided with a folding unlocking switch acting on the upper folding joint for unlocking the lower folding joint. The upper push rod is rotated around the upper folding joint to realize the folding of the upper push rod and the lower push rod. The front seat plate and the front wheel mechanism are provided with a first rotating shaft.

2. The foldable stroller frame of claim 1, wherein: The seat plate pivoting part is provided with a fourth extension part rotatably connected with one end of the connecting rod.

3. The foldable stroller frame of claim 1, wherein: The lower joint rotating part is provided with a fifth extension part rotatably connected with the other end of the connecting rod.

4. The foldable stroller frame of claim 1, wherein: The frame further comprises a protective fence. The lower joint end cover is provided with a first locking block and an elastic member acting on the first locking block. The lower joint rotating part is provided with a limiting hole.

5. The foldable stroller frame of claim 4, wherein: The second locking block is driven to move away from the lower joint base when the lower joint rotating part rotates relative to the lower joint base.

6. The foldable stroller frame of claim 1, wherein: The lower joint end cover is provided with a locking groove matched with the second locking block.

7. The foldable stroller frame of claim 6, wherein: The folding unlocking switch and the upper folding joint are provided with a first unlocking cable. The upper folding joint comprises an upper joint rotating part connected with the upper push rod, an upper joint base connected with the lower push rod and a first limiting tooth arranged between the upper joint rotating part and the upper joint base. The upper joint rotating part and the upper joint base are respectively provided with a first tooth groove and a second tooth groove matched with the first limiting tooth. The upper joint rotating part is internally provided with a first rotating push block in contact with the first limiting tooth; one end of the first unlocking cable is connected with the first rotating push block, and the other end is connected with the folding unlocking switch; The first limiting tooth comprises a first locking state of being simultaneously embedded in the first tooth groove and the second tooth groove, and a first unlocking state of being embedded in the second tooth groove; The folding unlocking switch drives the first rotating push block to rotate through the first unlocking cable, the first rotating push block moves axially while rotating, and drives the first limiting tooth to move, so that the first limiting tooth is switched from the first locking state to the first unlocking state, and the upper joint rotating part can rotate.

8. The foldable stroller frame of claim 7, wherein: The upper joint base is internally provided with a positioning ring, the positioning ring is provided with a cable positioning block extending axially into the first tooth groove, one end of the second unlocking cable is connected with the cable positioning block; the first tooth groove is provided with a driving boss matched with the cable positioning block; The driving boss rotates with the upper joint rotating part, the driving boss rotates to contact the cable positioning block and drive the cable positioning block to rotate, and the cable positioning block drives the lower folding joint to be unlocked through the second unlocking cable.

9. The foldable stroller frame of claim 6, wherein: The lower folding joint further comprises a second limiting tooth arranged between the lower joint base and the lower joint rotating part; The lower joint rotating part and the lower joint base are respectively provided with a third tooth groove and a fourth tooth groove matched with the second limiting tooth; The second limiting tooth comprises a second locking state of being simultaneously embedded in the third tooth groove and the fourth tooth groove, and a second unlocking state of being embedded in the fourth tooth groove; The lower joint rotating part is internally provided with a second rotating push block in contact with the second limiting tooth, and one end of the second rotating push block is connected with the second unlocking cable; The second unlocking cable drives the second rotating push block to rotate, the second rotating push block moves axially while rotating, and drives the second limiting tooth to move, so that the second limiting tooth is switched from the second locking state to the second unlocking state.

10. A stroller characterized by: The folding stroller frame comprises the folding stroller frame according to any one of claims 1-9.

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