Folding baby carriage

Abstract

The utility model provides a folding baby carriage, which relates to the technical field of baby carriages, and comprises a push rod, a first support rod, a second support rod, a first connecting rod, a second connecting rod and a second connecting rod, the other ends of the two first supporting rods are rotationally connected with second supporting rods, and the other end of each second supporting rod is hinged to a first rolling wheel. The outer wall face of each first supporting rod is rotationally connected with a third supporting rod, and the other end of each third supporting rod is rotationally connected with a second rolling wheel. The locking mechanisms are located between the first supporting rods and the second supporting rods which are adjacent to each other, are used for locking the supporting frames at the rotary connection positions of the first supporting rods and the second supporting rods which are adjacent to each other, and are located between the two second supporting rods and the two third supporting rods, and the supporting frames are rotationally connected with the second supporting rods and the third supporting rods. The folding mode of the baby carriage is simple, and the folding part is not easy to be touched and opened by children.

Description

Technical Field

[0001] This utility model relates to the field of baby stroller technology, specifically to a folding baby stroller. Background Technology

[0002] Current strollers are foldable, reducing their space requirements for transport and making them easier to carry. However, the folding mechanism is often cumbersome, preventing quick and easy storage. Furthermore, the folding mechanism, located near the child, is easily touched by curious children, making the stroller unstable and increasing the risk of the child falling out of the basket. Utility Model Content

[0003] This invention addresses the problems of cumbersome and slow folding methods in existing strollers, as well as instability caused by children accidentally touching the folding mechanism in the basket. It provides a folding stroller with a simple folding method and folding parts that are not easily opened by children.

[0004] The technical solution adopted in this utility model is:

[0005] A foldable stroller is provided, comprising:

[0006] A push rod has a first support rod at each end, with the central axes of the two first support rods being parallel to each other; the other end of each of the two first support rods is rotatably connected to a second support rod, and the other end of each second support rod is hinged to a first roller; a third support rod is rotatably connected to the outer wall of each first support rod, and the other end of each third support rod is rotatably connected to a second roller; a locking mechanism is located between each adjacent first support rod and second support rod, used to lock the rotatable connection between the adjacent first support rod and each second support rod; a support frame is located between the two second support rods and the two third support rods, and the support frame is rotatably connected to each second support rod and each third support rod.

[0007] Optionally, the locking mechanism includes:

[0008] A first cylinder has its outer wall connected to one end of a first support rod facing an adjacent second support rod. One end of the first cylinder has a small diameter, and the other end has a large diameter. A limiting plate is located inside the first cylinder at its small diameter end, and a first through hole communicating with the interior of the first cylinder is opened in the middle of the limiting plate. A pressure plate is located inside the small diameter end of the first cylinder and is slidably connected to the first cylinder. A pressure rod is provided on the side of the pressure plate facing the large diameter end of the first cylinder, and a limiting hole for the pressure rod to pass through is opened on the end face of the limiting plate. A second cylinder has its outer wall connected to one end of a second support rod facing an adjacent first support rod, and the second cylinder is rotatably connected to the large diameter end of the first cylinder, forming a cavity between the opposing surfaces of the second and first cylinders. A sealing plate is provided on the other end face of the second cylinder, and a second through hole communicating with the interior of the second cylinder is opened in the middle of the sealing plate, with the central axis of the second through hole aligned with the central axis of the first through hole. A spring has one end located on the outer wall of the sealing plate and the other end located on a locking block. The locking block is located inside the second cylinder and is slidably connected to the second cylinder. A limiting groove is formed on the side wall of the locking block. A first limiting block that engages with the limiting groove is provided on the inner wall of the first cylinder, and a second limiting block that engages with the limiting groove is provided on the inner wall of the second cylinder. A child lock assembly is located on the outer wall of each first support rod. The working end of the child lock assembly passes through the second through hole and the first through hole in sequence to limit the movement of the pressure plate.

[0009] Optionally, the child lock component includes:

[0010] A limiting shaft, one end of which is located on the end face of the pressure plate facing the second cylinder, and the other end is located inside the first through hole and the second through hole. An insertion hole is provided on the outer wall surface of the limiting shaft. A fixing block is located on the outer wall surface of the second cylinder. A fixing hole is provided inside the fixing block. A connecting rope, one end of which is located on the outer wall surface of the fixing block, and the other end of which is provided with an insertion rod that passes through the fixing hole and the insertion hole in sequence.

[0011] Optionally, the end of the pressure bar is provided with a barb, which hooks onto the end of the limiting plate facing the second cylinder.

[0012] Optionally, the acute angle between the central axis of the fixing hole and the horizontal plane is greater than 30°.

[0013] Optionally, each first support rod is provided with a first reinforcing rib between itself and the adjacent first cylinder, and each second support rod is provided with a second reinforcing rib between itself and the adjacent second cylinder.

[0014] Optionally, a buckle is provided on the outer wall of one of the third support rods, and a locking block that engages with the buckle is provided on the outer wall of one of the first support rods.

[0015] Optionally, the support frame is rotatably connected to a leg support at one end facing the second support rod.

[0016] Optionally, a foot pedal is provided between adjacent second support rods.

[0017] Optionally, a connecting rod is provided between adjacent third support rods.

[0018] The beneficial effects of this utility model are:

[0019] 1. By setting a locking mechanism between the first and second support rods in a rotatable connection, when it is necessary to adjust the first support rod to rotate on the second support rod, the locking mechanism releases the lock at the connection between the first and second support rods, allowing the first support rod to rotate on the second support rod, thereby completing the folding function; when it is necessary to open the folded stroller, simply adjust and rotate the first support rod so that the first support rod rotates and opens along the rotatable connection with the second support rod, and after the first support rod has rotated to the full extent and the second support rod has opened, the locking mechanism can then lock the rotatable connection between the first and second support rods to prevent the stroller from being unstable after opening;

[0020] 2. The child lock component in the locking mechanism can prevent children in the stroller from accidentally touching the locking mechanism, which would cause the rotational connection between the first support rod and the second support rod to be unlocked, resulting in unstable support of the stroller. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of a folding stroller;

[0023] Figure 2 for Figure 1 The main view;

[0024] Figure 3 for Figure 1 Side view;

[0025] Figure 4 Schematic diagram of the three-dimensional structure of the locking mechanism Figure 1 ;

[0026] Figure 5 Schematic diagram of the three-dimensional structure of the locking mechanism Figure 2 ;

[0027] Figure 6for Figure 5 Cross-sectional view of surface AA;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the pressure plate;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the card block;

[0030] Figure 9 Schematic diagram of the connection structure between the first cylinder and the first connecting cylinder Figure 1 ;

[0031] Figure 10 Schematic diagram of the connection structure between the first cylinder and the first connecting cylinder Figure 2 ;

[0032] Figure 11 Schematic diagram of the connection structure between the second cylinder and the second connecting cylinder Figure 1 ;

[0033] Figure 12 Schematic diagram of the connection structure between the second cylinder and the second connecting cylinder Figure 2 .

[0034] Figure label:

[0035] 1-Push rod;

[0036] 2-First support rod, 20-First connecting cylinder, 21-Clipping block, 22-Front support, 23-Rear support, 24-First reinforcing rib;

[0037] 3-Second support rod, 30-Second connecting cylinder, 31-First roller, 32-Foot pedal, 33-Second reinforcing rib;

[0038] 4-Third support rod, 40-Second roller, 41-Connecting rod;

[0039] 5-Locking mechanism, 50-First cylinder, 501-Limiting plate, 5010-First through hole, 502-First limiting block, 51-Second cylinder, 510-Sealing plate, 5101-Second through hole, 511-Second limiting block, 52-Pressure plate, 520-Pressure rod, 521-Barb, 53-Clamping block, 54-Spring;

[0040] 6-Child lock assembly, 60-Fixing block, 601-Fixing hole, 61-Connecting rope, 62-Limiting shaft, 620-Insertion hole, 63-Insertion rod;

[0041] 7-Support frame; 70-Leg rest; 8-Handrail. Detailed Implementation

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0044] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0045] Example

[0046] like Figure 1-4 As shown, this embodiment discloses a folding stroller, including:

[0047] The push rod 1 has a first support rod 2 at each end, and the central axes of the two first support rods 2 are parallel to each other; the other ends of the two first support rods 2 are rotatably connected to a second support rod 3, and the other end of each second support rod 3 is hinged to a first roller 31; the outer wall surface of each first support rod 2 is rotatably connected to a third support rod 4, and the other end of each third support rod 4 is rotatably connected to a second roller 40.

[0048] The locking mechanism 5 is located between each adjacent first support rod 2 and second support rod 3, and is used to lock the rotatable connection between the adjacent first support rod 2 and each second support rod 3;

[0049] The support frame 7 is located between the two second support rods 3 and the two third support rods 4, and the support frame 7 is rotatably connected to each of the second support rods 3 and each of the third support rods 4.

[0050] In use, a locking mechanism 5 is provided between the first support rod 2 and the second support rod 3, which are rotatably connected. When it is necessary to adjust the first support rod 2 to rotate on the second support rod 3, the locking mechanism 5 releases the lock on the connection between the first support rod 2 and the second support rod 3, allowing the first support rod 2 to rotate on the second support rod 3, thereby completing the folding function. When it is necessary to open the folded stroller, simply adjust the rotation of the first support rod 2 so that the first support rod 2 rotates and opens along the rotatable connection with the second support rod 3. After the first support rod 2 has rotated completely and the second support rod 3 has opened, the locking mechanism 5 can then lock the rotatable connection between the first support rod 2 and the second support rod 3 to prevent the stroller from being unstable after it is opened.

[0051] In the above embodiment, a front support 22 and a rear support 23 are respectively provided between adjacent first support rods 2, and both the front support 22 and the rear support 23 are used to support the sunshade awning.

[0052] In one embodiment, such as Figure 4 and Figure 6-12 As shown, the locking mechanism 5 includes:

[0053] The outer wall of the first cylindrical body 50 is connected to one end of one of the first support rods 2 facing the adjacent second support rod 3; one end of the first cylindrical body 50 is a small-diameter end and the other end is a large-diameter end; a limiting piece 501 is provided inside the first cylindrical body 50, the limiting piece 501 is located at the small-diameter end of the first cylindrical body 50, and a first through hole 5010 communicating with the interior of the first cylindrical body 50 is opened in the middle of the limiting piece 501;

[0054] The pressure plate 52 is located inside the small-diameter end of the first cylinder 50, and the pressure plate 52 is slidably connected to the first cylinder 50; a pressure rod 520 is provided on the side of the pressure plate 52 facing the large-diameter end of the first cylinder 50, and a limiting hole for the pressure rod 520 to pass through is provided on the end face of the limiting piece 501.

[0055] The second cylinder 51 has its outer wall surface connected to the end of the second support rod 3 facing the adjacent first support rod 2, and the second cylinder 51 is rotatably connected to the large-diameter end of the first cylinder 50, forming a cavity between the opposing surfaces of the second cylinder 51 and the first cylinder 50; the other end face of the second cylinder 51 is provided with a sealing plate 510 located inside the second cylinder 51, and the middle part of the sealing plate 510 is provided with a second through hole 5101 communicating with the interior of the second cylinder 51, and the central axis of the second through hole 5101 is consistent with the central axis of the first through hole 5010;

[0056] Spring 54, one end of which is provided on the outer wall of sealing plate 510, and the other end is provided with a locking block 21; the locking block 21 is located inside the second cylinder 51 and is slidably connected to the second cylinder 51; a limiting groove is provided on the side wall of the locking block 21, a first limiting block 502 that engages with the limiting groove is provided on the inner wall of the first cylinder 50, and a second limiting block 511 that engages with the limiting groove is provided on the inner wall of the second cylinder 51;

[0057] The child lock assembly 6 is located on the outer wall of each first support rod 2. The working end of the child lock assembly 6 passes through the second through hole 5101 and the first through hole 5010 in sequence to restrict the movement of the pressure plate 52.

[0058] In use, the locking mechanism 5 can lock the rotatable connection between the first support rod 2 and the second support rod 3, preventing the first support rod 2 and the second support rod 3 from rotating on their own. When folding is required, that is, when rotation between the first support rod 2 and the second support rod 3 is necessary, the locking mechanism 5 can be adjusted to release the lock at the rotatable connection between the first support rod 2 and the second support rod 3, thereby achieving the folding effect. Specifically, the locking mechanism 5 includes a first cylinder 50 and a second cylinder 51, which are rotatably connected. After the first cylinder 50 and the second cylinder 51 are rotatably connected, a cavity is formed between the opposing surfaces of the first cylinder 50 and the second cylinder 51. One end of the first cylindrical body 50 has a small diameter and the other end has a large diameter, with the large diameter end of the first cylindrical body 50 facing the second cylindrical body 51. A limiting piece 501 is provided at the small diameter end of the first cylindrical body 50, located inside the first cylindrical body 50 and at the connection between the small and large diameters within the first cylindrical body 50; that is, the side of the limiting piece 501 facing the second cylindrical body 51 is the large diameter end of the first cylindrical body 50. A first through hole 5010 is provided at the middle of the limiting piece 501, communicating with the inner hole of the first cylindrical body 50 and connecting the large diameter end and the small diameter end of the first cylindrical body 50.

[0059] The second cylinder 51 is located at the end of the second support rod 3 facing the first support rod 2. A sealing plate 510 is provided on the end face of the second cylinder 51 away from the first cylinder 50, completely sealing one end face of the second cylinder 51. A second through hole 5101 is then opened at the middle position of the sealing plate 510, and the second through hole 5101 communicates with the inner hole of the second cylinder 51. A locking block 21 is placed inside the end of the second cylinder 51 facing the first cylinder 50, and the locking block 21 can slide inside the second cylinder 51. A limiting groove is formed on the outer wall of the locking block 21, that is, a locking groove is formed on the sliding connection surface between the locking block 21 and the first cylinder 50 or the second cylinder 51. A first limiting block 502 is provided on the inner wall surface of the first cylinder 50 facing the second cylinder 51, and a second limiting block 511 is provided on the inner wall surface of the second cylinder 51 facing the first cylinder 50. Both the first limiting block 502 and the second limiting block 511 can limit the locking block 21 through the limiting groove. A spring 54 is provided inside the second cylinder 51. One end of the spring 54 is connected to the side of the sealing plate 510 facing the large diameter end of the second cylinder 51, and the other end is connected to the locking block 21. When folding is not required by rotating the first support rod 2 and the second support rod 3, the locking block 21 located inside the second cylinder 51 is pushed between the first cylinder 50 and the second cylinder 51 under the action of the spring 54. At this time, the locking block 21 can limit the rotation of the first cylinder 50, which is rotatably connected to the second cylinder 51. When folding is required by rotating the first support rod 2 and the second support rod 3, the pressure plate 52 located inside the first cylinder 50 is pressed. The pressure plate 52, through the pressure rod 520, presses the locking block 21 located inside the first cylinder 50. After being pressed, the locking block 21 moves toward the inside of the second cylinder 51 until the locking block 21 is released from the rotation restriction of the first cylinder 50. At this time, the first support rod 2 can be rotated, so that the first support rod 2 rotates on the second support rod 3 to complete the folding.

[0060] The locking mechanism 5 also includes a child lock assembly 6, which is located on the outer wall of the second cylinder 51. It can restrict the pressure plate 52 in the first cylinder 50 to prevent children from pressing the pressure plate 52 out of curiosity, which would affect the stability of the stroller.

[0061] In the above embodiment, a first connecting cylinder 20 is provided between the first support rod 2 and the first cylinder 50. The first support rod 2 is slidably connected to one end of the first connecting cylinder 20, and the other end of the first connecting cylinder 20 is connected to the first cylinder 50. A second connecting cylinder 30 is provided between the second support rod 3 and the second cylinder 51. The second support rod 3 is slidably connected to one end of the second connecting cylinder 30, and the other end of the second connecting cylinder 30 is connected to the second cylinder 51. The first connecting cylinder 20 and the second connecting cylinder 30 are provided to enhance the connection stability at the connection point and facilitate the disassembly of the first support rod 2 and the second support rod 3.

[0062] In one embodiment, such as Figure 5 and Figure 6 As shown, the child lock component 6 includes:

[0063] The limiting shaft 62 has one end located on the end face of the pressure plate 52 facing the second cylinder 51, and the other end located inside the first through hole 5010 and the second through hole 5101. An insertion hole 620 is provided on the outer wall surface of the limiting shaft 62.

[0064] A fixing block 60 is provided on the outer wall surface of the second cylinder 51, and a fixing hole 601 is provided inside the fixing block 60.

[0065] The connecting rope 61 has one end on the outer wall of the fixing block 60 and the other end is provided with a plug rod 63 that passes through the fixing hole 601 and the insertion hole 620 in sequence.

[0066] In use, the child lock assembly 6 can limit the sliding of the pressure plate 52 by restricting the sliding of the limiting shaft 62, thereby preventing children from accidentally squeezing the pressure plate 52 and causing the locking mechanism 5 to fail to lock the rotational connection between the first support rod 2 and the second support rod 3. Specifically, the child lock assembly 6 includes a limiting shaft 62, one end of which is located on the end face of the pressure plate 52 facing the second cylinder 51, and the other end passes through the first through hole 5010 and the second through hole 5101 in sequence. A fixing block 60 is provided on the outer wall of the second cylinder 51. The fixing block 60 has a fixing hole 601 inside, and a connecting rope 61 is fixedly connected to the outer wall of the fixing block 60. The other end of the connecting rope 61 is provided with an insertion rod 63. When the pressure plate 52 needs to be limited by the limiting shaft 62, the insert rod 63 is first inserted into the fixing hole 601 inside the fixing block 60, and then inserted into the insertion hole 620 opened in the limiting shaft 62. At this time, the insert rod 63 is just inside the fixing hole 601 and the insertion hole 620 due to the length limitation of the connecting rope 61, which can complete the limitation of the upper limiting shaft 62. At this time, when the pressure plate 52 is pressed, the pressure plate 52 contacts the immovable limiting shaft 62. The pressure plate 52 cannot squeeze the pressure block by the pressure rod 520, so the first support rod 2 cannot rotate along the second support rod 3, thus achieving the effect of child lock.

[0067] In one embodiment, such as Figure 7 As shown, the end of the pressure rod 520 is provided with a barb 521, which hooks onto the end of the limiting piece 501 facing the second cylinder 51.

[0068] In use, the end of the pressure rod 520 facing the second cylinder 51 is provided with barbs 521, which can prevent the pressure plate 52 from falling out of the inner hole of the first cylinder 50. Specifically, the number of barbs 521 depends on the number of pressure rods 520. The more barbs 521 there are, the more effectively the pressure plate 52 can be prevented from falling out of the inner hole of the first cylinder 50.

[0069] In one embodiment, the acute angle between the central axis of the fixing hole 601 and the horizontal plane is greater than 30°.

[0070] When in use, after the insertion rod 63 is inserted into the fixing hole 601 inside the limiting block and the insertion hole 620 inside the limiting shaft 62 in sequence, in order to prevent the insertion rod 63 from sliding out of the insertion hole 620 and the fixing hole 601 during the use of the stroller, the insertion rod 63 needs to be inserted from above the limiting block, and the central axis of the fixing hole 601 and the central axis of the insertion hole 620 are not on the horizontal plane, so as to prevent the insertion rod 63 from falling off and causing the child in the stroller to accidentally touch it.

[0071] In one embodiment, such as Figure 3 and Figure 4 As shown, each first support rod 2 is provided with a first reinforcing rib 24 between it and the adjacent first cylinder 50, and each second support rod 3 is provided with a second reinforcing rib 33 between it and the adjacent second cylinder 51.

[0072] In use, the first reinforcing rib 24 and the second reinforcing rib 33 can improve the support stability between the first support rod 2 and the first cylinder 50, as well as the support stability between the second support rod 3 and the second cylinder 51.

[0073] In one embodiment, such as Figure 3 As shown, a buckle is provided on the outer wall of one of the third support rods 4, and a locking block 21 that engages with the buckle is provided on the outer wall of one of the first support rods 2.

[0074] In use, when the stroller is folded and stored, the first support rod 2 can be fixed to the third support rod 4 by the engagement of the locking block 21 and the buckle, preventing the stroller from being difficult to lift after folding and storing. Specifically, the locking block 21 is set on the outer wall of one of the first support rods 2, and is the closest first support rod 2 to the third support rod 4. The buckle is set on the outer wall of one of the third support rods 4, and a fixing cylinder is provided between the buckle and the third support rod 4. That is, the fixing cylinder is connected to the third support rod 4 by bolts, and the buckle is set on the outer wall of the fixing cylinder. The support frame 7 is rotatably connected to the fixing cylinder. The setting of the fixing cylinder enhances the connection stability between the third support rod 4 and the support frame 7. In addition, the buckle is specifically elliptical in shape and has a hole inside. A part of the buckle is inclined, so that the locking block 21 on the outer wall of the first support rod 2 can enter the hole inside the buckle through the inclined part of the buckle to complete the engagement.

[0075] In one embodiment, such as Figure 1-3 As shown, the support frame 7 is rotatably connected to a leg support 70 at one end facing the second support rod 3.

[0076] In use, by rotating the leg rest 70, the child's legs in the stroller can be supported, improving riding comfort and effectively reducing leg fatigue. Specifically, the support frame 7 is rotatably connected to the leg rest 70 at one end face facing the second support rod 3. There are at least two leg rests 70 to facilitate support for the child's two thighs.

[0077] In one embodiment, such as Figure 1-3 As shown, a foot pedal 32 is provided between adjacent second support rods 3.

[0078] When in use, the foot pedal 32 provides a stable support surface for the child in the stroller, which not only helps to exercise the child's leg muscles but also promotes bone and joint growth and development. In addition, it helps the child maintain a comfortable posture in the stroller. Specifically, the foot pedal 32 is disposed between the opposing outer walls of the adjacent second support rod 3.

[0079] In one embodiment, such as Figure 1-3 As shown, a connecting rod 41 is provided between adjacent third support rods 4.

[0080] In use, the connecting rod 41 enhances the stability of the stroller. Specifically, connecting rods 41 are installed on the opposite outer wall surfaces of adjacent third support rods 4. There can be one or more connecting rods 41; the more connecting rods 41 there are, the more stable the stroller will be. The connecting rod 41 also facilitates the subsequent installation of a braking mechanism to brake the second roller 40 rotatably connected to the end of the third support rod 4, preventing the stroller from slipping.

[0081] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A folding stroller, characterized in that, include: A push rod has a first support rod at each end, and the central axes of the two first support rods are parallel to each other; the other ends of the two first support rods are rotatably connected to a second support rod, and the other end of each second support rod is hinged to a first roller; a third support rod is rotatably connected to the outer wall of each first support rod, and the other end of each third support rod is rotatably connected to a second roller. A locking mechanism, located between each adjacent first support rod and second support rod, is used to lock the rotatable connection between the adjacent first support rod and each second support rod; A support frame is located between the two second support rods and the two third support rods, and the support frame is rotatably connected to each of the second support rods and each of the third support rods.

2. The folding stroller according to claim 1, characterized in that, The locking mechanism includes: The first cylinder has its outer wall surface connected to one end of one of the first support rods facing the adjacent second support rod; one end of the first cylinder is a small-diameter end and the other end is a large-diameter end; a limiting plate is provided inside the first cylinder, the limiting plate is located at the small-diameter end of the first cylinder, and a first through hole communicating with the interior of the first cylinder is opened in the middle of the limiting plate. A pressure plate is located inside the small-diameter end of the first cylinder, and the pressure plate is slidably connected to the first cylinder; a pressure rod is provided on the side of the pressure plate facing the large-diameter end of the first cylinder, and a limiting hole is provided on the end face of the limiting piece for the pressure rod to pass through; The second cylinder has its outer wall surface connected to the end of the second support rod facing the adjacent first support rod, and the second cylinder is rotatably connected to the large-diameter end of the first cylinder, forming a cavity between the opposing surfaces of the second cylinder and the first cylinder; the other end face of the second cylinder is provided with a sealing plate located inside the second cylinder, and the middle part of the sealing plate is provided with a second through hole communicating with the interior of the second cylinder, and the central axis of the second through hole is consistent with the central axis of the first through hole; A spring has one end located on the outer wall of the sealing plate and the other end located on a locking block. The locking block is located inside the second cylinder and is slidably connected to the second cylinder. A limiting groove is formed on the side wall of the locking block. A first limiting block that engages with the limiting groove is provided on the inner wall of the first cylinder, and a second limiting block that engages with the limiting groove is provided on the inner wall of the second cylinder. A child lock assembly is disposed on the outer wall surface of each of the first support rods. The working end of the child lock assembly passes through the second through hole and the first through hole in sequence to restrict the movement of the pressure plate.

3. The folding stroller according to claim 2, characterized in that, The child lock component includes: A limiting shaft has one end located on the end face of the pressure plate facing the second cylinder, and the other end located inside the first through hole and the second through hole. An insertion hole is provided on the outer wall surface of the limiting shaft. A fixing block is provided on the outer wall surface of the second cylinder, and a fixing hole is provided inside the fixing block; A connecting rope, one end of which is located on the outer wall of the fixing block, and the other end of which is provided with a plug that passes through the fixing hole and the insertion hole in sequence.

4. The folding stroller according to claim 2, characterized in that, The end of the pressure rod is provided with a barb, which hooks onto the end of the limiting plate facing the second cylinder.

5. The folding stroller according to claim 3, characterized in that, The acute angle between the central axis of the fixing hole and the horizontal plane is greater than 30°.

6. The folding stroller according to claim 2, characterized in that, Each of the first support rods is provided with a first reinforcing rib between itself and the adjacent first cylinder, and each of the second support rods is provided with a second reinforcing rib between itself and the adjacent second cylinder.

7. The folding stroller according to claim 1, characterized in that, One of the third support rods has a buckle on its outer wall surface, and one of the first support rods has a locking block on its outer wall surface that engages with the buckle.

8. The folding stroller according to claim 1, characterized in that, The support frame is rotatably connected to a leg rest at one end facing the second support rod.

9. The folding stroller according to claim 1, characterized in that, A foot pedal is provided between adjacent second support rods.

10. The folding stroller according to claim 1, characterized in that, A connecting rod is provided between adjacent third support rods.

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