Folding trolley for children

Abstract

The utility model discloses a child folding trolley, a seat assembly comprises a seat, a steering wheel and a supporting disc, the steering wheel is located below the seat, and the steering wheel can rotate in a reciprocating mode relative to the supporting disc located below the steering wheel; the hand push rod set comprises a telescopic rod, an outer rod sleeve and a sliding sleeve, the telescopic rod is sleeved with the outer rod sleeve, the telescopic rod can stretch out and draw back in the outer rod sleeve in a reciprocating mode, the outer rod sleeve is sleeved with the sliding sleeve, and the sliding sleeve can slide along the outer rod sleeve in a reciprocating mode; the two ends of the two rear wheel rods are hinged to the supporting disc and the outer rod sleeve respectively. The end part of the connecting frame, the top end of the front wheel rod and the rear end of the supporting disc are rotatably connected; the folding unlocking assembly comprises a positioning sliding block and an ejector block, the positioning sliding block can enter or move out of the sliding sleeve, the ejector block is arranged in the telescopic rod, the telescopic rod stretches out and draws back in the outer rod sleeve to drive the ejector block to move, the ejector block can abut against or be separated from one end of the positioning sliding block, and the positioning sliding block can enter or move out of a lock hole in one side of the outer rod sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of carts, in particular to a foldable children's cart. Background Art

[0002] The trolleys on the market generally include a front wheel rod, a rear wheel rod, a push rod and a seat. In order to save space and facilitate carrying and storage, the front wheel rod, the rear wheel rod and the push rod can be linked and folded. The folding structures and principles are different. In order to make the steps simpler, the operation more convenient, and the linkage smoother when the trolley is folded, technical personnel in this field should continuously study and improve the trolley. Therefore, the present application proposes a children's folding trolley to meet the consumer's requirements for portable folding of trolleys. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a foldable child stroller in view of the above-mentioned deficiencies in the prior art.

[0004] To achieve its purpose, the utility model adopts the following technical solutions:

[0005] A foldable stroller for children, comprising a seat assembly, a hand push rod assembly, a front wheel rod assembly, a rear wheel rod assembly and a folding unlocking assembly; the seat assembly comprises a seat, a steering wheel and a support plate, the steering wheel is located under the seat, the seat comprises a seat cushion and a backrest, the front ends of the steering wheel are fixedly connected to the seat cushion, the outer periphery of the backrest is provided with a ∩-shaped backrest bracket, and the rear ends of the steering wheel are rotatably connected to the two ends of the backrest bracket; the support plate is concentrically arranged under the steering wheel, and the steering wheel can reciprocate around the center of the support plate; the hand push rod assembly comprises a telescopic rod, an outer rod sleeve and a sliding sleeve, the outer rod sleeve is sleeved on the outside of the telescopic rod, the telescopic rod can reciprocate and retract inside the outer rod sleeve, the sliding sleeve is sleeved on the outside of the outer rod sleeve, the sliding sleeve can reciprocate along the outer rod sleeve, and one end of the sliding sleeve is connected to a connecting frame; The rear wheel rod group includes two rear wheel rods arranged in parallel, the top ends of the two rear wheel rods are hinged to the front end of the support plate, and the other end is hinged to the outer rod sleeve; the front wheel rod group includes a front wheel rod, the front wheel rod is arranged between the two rear wheel rods, the middle part of the front wheel rod is hinged to the middle parts of the two rear wheel rods, the top end of the front wheel rod is located at the inner side of the rear end of the support plate, the end of the connecting frame away from the sliding sleeve is located at the inner side of the top end of the front wheel rod, the end of the connecting frame, the top end of the front wheel rod and the rear end of the support plate are rotatably connected; the folding unlocking assembly includes a positioning slider and a top block, the positioning slider is partially located in the connecting frame, the positioning slider can enter or move out of the sliding sleeve, the top block is arranged in the telescopic rod, the telescopic rod is telescoped in the outer rod sleeve to drive the top block to move, the top block can contact or separate with one end of the positioning slider, so that the positioning slider can enter or move out of the locking hole on one side of the outer rod sleeve.

[0006] Preferably, the end of the front wheel rod is connected to the front wheel of the vehicle, and the end of the rear wheel rod is connected to the rear wheel of the vehicle; a sunshade is provided above the seat, and a handle is provided on the outer side of the rear end of the support plate.

[0007] Preferably, a push handle is fixed on the top of the telescopic rod; the folding unlocking assembly also includes a first unlocking button and a pull wire, the first unlocking button is arranged on the push handle, the first unlocking button is connected to the pull wire, the pull wire is located inside the telescopic rod, and the end of the pull wire away from the first unlocking button is connected to the top block.

[0008] Preferably, a slope is provided at the end of the top block, and the slope forms an obtuse angle with the surface of the end of the top block, and one end of the positioning slider can fit with the slope of the top block; a return spring is provided in the internal cavity of the positioning slider, and the other end of the return spring abuts against the inner wall of the connecting frame.

[0009] Preferably, a second unlocking button is provided on the top of the backrest bracket, a first rotating sleeve is provided at both ends of the backrest bracket, and a first rotating part is provided on both sides of the rear end of the steering wheel, and the first rotating sleeve is snap-fitted and installed on the outside of the first rotating part and fixed by the central axis; a fixing plate and a positioning plate are provided inside the first rotating sleeve, the fixing plate is fixed between the first rotating part and the first rotating sleeve, the positioning plate is connected to the second unlocking button by a pull wire, and a positioning groove is provided on the top of the fixing plate, and the positioning plate can be inserted into or moved out of the positioning groove.

[0010] Preferably, a protrusion is provided on the edge of the outer end surface of the first rotating part, and a groove matching the protrusion is provided on the edge of the fixing plate, and the protrusion is inserted into the groove.

[0011] Preferably, a card slot is provided on the annular rib at the bottom of the steering wheel, a radial accommodating groove is provided inside the support plate, an unlocking key is slidably provided in the accommodating groove, a return spring is provided between the unlocking key and the partition in the accommodating groove, and a clamping portion is provided on the top of the unlocking key, which can be inserted into or moved out of the card slot.

[0012] Preferably, a pulling portion is provided on one side of the unlocking key, a notch is provided on the supporting plate, and the pulling portion of the unlocking key is located at the notch.

[0013] Preferably, the trolley also includes a foot pedal, a second rotating part is provided on both sides of the foot pedal, and a second rotating sleeve is provided on both sides of the front end of the steering wheel. The second rotating sleeve is snap-fitted and installed on the outside of the second rotating part, and the second rotating part can reciprocate relative to the second rotating sleeve.

[0014] Preferably, a gear is slidably arranged between the second rotating part and the second rotating sleeve, and the gear can be engaged with the second rotating part and the second rotating sleeve at the same time, or be disengaged from the second rotating sleeve and engaged with the second rotating part; a reset spring is arranged between the gear and the second rotating part, and a pressing cover is arranged on the outer side of the second rotating sleeve, and the legs of the pressing cover pass through the second rotating sleeve and contact the gear; first bevel teeth are evenly distributed on one end face of the gear, and second bevel teeth cooperating with the first bevel teeth are arranged inside the second rotating sleeve, and the bevels of the first bevel teeth and the second bevel teeth are in contact with each other.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a foldable child stroller. By pressing the first unlocking button, the top block is driven to move downward, thereby pushing the positioning slider to move out of the outer rod sleeve and the sliding sleeve, so as to unlock the sliding sleeve and the outer rod sleeve, that is, the telescopic rod and the outer rod sleeve are unlocked, and the sliding sleeve is moved to slide upward along the outer rod sleeve. Since the outer rod sleeve is hinged with the rear wheel rod, the front wheel rod is hinged with the rear wheel rod, and the connecting frame, the front wheel rod and the supporting plate are rotatably connected, when the sliding sleeve moves upward, the rear wheel rod and the front wheel rod rotate close to the outer rod sleeve until the outer rod sleeve, the front wheel rod and the rear wheel rod rotate to the maximum extent, thereby realizing the folding of the stroller frame; at the same time, since the two ends of the backrest bracket are rotatably connected with the two sides of the rear end of the steering wheel, the backrest is rotated close to the seat cushion, thereby realizing the folding of the stroller seat; and the steering wheel can reciprocate relative to the center of the supporting plate, thereby realizing the steering of the seat. Therefore, the folding structure of the stroller of the utility model is simple, the folding process is efficient and labor-saving, and it is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For ease of explanation, the present invention is described in detail by the following specific implementations and drawings.

[0018] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0019] Figure 2 is a structural schematic diagram of another viewing angle of this embodiment;

[0020] Figure 3 Schematic diagram of the structure of the push rod assembly of this embodiment;

[0021] Figure 4 This is a schematic diagram of the structure of the folding and unlocking assembly of this embodiment;

[0022] Figure 5 is a schematic diagram of the disassembly of the first rotating part and the first rotating sleeve of this embodiment;

[0023] Figure 6 is a schematic diagram of the disassembly of the second rotating part and the second rotating sleeve of this embodiment;

[0024] Figure 7 is a schematic diagram of the internal structure of the second rotating sleeve of this embodiment;

[0025] Figure 8 is a schematic structural diagram of the steering wheel of this embodiment;

[0026] Fig. 9 is a schematic structural diagram of the support plate of this embodiment;

[0027] Fig.10 It is a schematic diagram of the positions of the receiving groove and the notch of the support plate of this embodiment;

[0028] Fig.11 Schematic diagram of the structure of the unlocking key of this embodiment.

[0029] In the figure:

[0030] 100-seat assembly; 110-seat; 111-seat cushion; 112-backrest; 120-steering wheel; 121-first rotating part; 1211-protrusion; 122-slot; 123-second rotating sleeve; 1231-second bevel tooth; 130-support plate; 131-accommodating groove; 132-unlocking key; 1321-clamping part; 1322-pulling part; 133-notch; 140-backrest bracket; 141-second unlocking button; 142-first rotating sleeve; 143-fixed plate; 1431-positioning groove; 1432-groove; 144-positioning plate; 150-shielding Awning; 160-handle; 200-hand push rod assembly; 210-telescopic rod; 220-outer rod sleeve; 230-sliding sleeve; 231-connecting frame; 240-push handle; 300-front wheel rod assembly; 310-front wheel rod; 400-rear wheel rod assembly; 410-rear wheel rod; 500-folding unlocking assembly; 510-positioning slider; 520-top block; 521-inclined surface; 530-first unlocking button; 540-pull line; 600-front wheel; 700-rear wheel; 800-pedal; 810-second rotating part; 820-gear; 821-first inclined surface tooth; 830-pressing cover. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments; in the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, for the sake of clarity and brevity, the description of known functions and structures is omitted.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0033] like Figure 1-11 As shown, a foldable stroller for children provided in this embodiment includes a seat assembly 100, a push rod assembly 200, a front wheel rod assembly 300, a rear wheel rod assembly 400 and a folding unlocking assembly 500; the seat assembly 100 includes a seat 110, a steering wheel 120 and a support plate 130, the steering wheel 120 is located below the seat 110, the seat 110 includes a seat cushion 111 and a backrest 112, the front ends of the steering wheel 120 are fixedly connected to the seat cushion 111, the outer periphery of the backrest 112 is provided with a ∩-shaped backrest bracket 140, and the rear end of the steering wheel 120 is fixedly connected to the seat cushion 111. The two sides are rotatably connected to the two ends of the backrest bracket 140; the support plate 130 is concentrically arranged below the steering wheel 120, and the steering wheel 120 can reciprocate around the center relative to the support plate 130; the push rod group 200 includes a telescopic rod 210, an outer rod sleeve 220 and a sliding sleeve 230, the outer rod sleeve 220 is sleeved on the outside of the telescopic rod 210, the telescopic rod 210 can reciprocate inside the outer rod sleeve 220, the sliding sleeve 230 is sleeved on the outside of the outer rod sleeve 220, the sliding sleeve 230 can reciprocate along the outer rod sleeve 220, and one end of the sliding sleeve 230 The connecting frame 231 is connected; the rear wheel rod group 400 includes two rear wheel rods 410 arranged in parallel, the top ends of the two rear wheel rods 410 are hinged to the front end of the support plate 130, and the other ends are hinged to the outer rod sleeve 220; the front wheel rod group 300 includes a front wheel rod 310, the front wheel rod 310 is arranged between the two rear wheel rods 410, the middle part of the front wheel rod 310 is hinged to the middle part of the two rear wheel rods 410, the top end of the front wheel rod 310 is located on the inner side of the rear end of the support plate 130, the end of the connecting frame 231 away from the sliding sleeve 230 is located on the inner side of the top end of the front wheel rod 310, and the connecting frame 231 The end, the top of the front wheel rod 310 and the rear end of the support plate 130 are rotatably connected; the folding unlocking component 500 includes a positioning slider 510 and a top block 520, the positioning slider 510 is partially located in the connecting frame 231, the positioning slider 510 can enter or move out of the sliding sleeve 230, and the top block 520 is arranged in the telescopic rod 210. The telescopic rod 210 is telescoped in the outer rod sleeve 220 to drive the top block 520 to move, and the top block 520 can contact or separate from one end of the positioning slider 510, so that the positioning slider 510 can enter or move out of the lock hole on one side of the outer rod sleeve 220.

[0034] Specifically, the trolley of this embodiment is unfolded and used as follows: Figure 1As shown, at this time, the telescopic rod 210 is extended to the longest in the outer rod sleeve 220, and the top block 520 conflicts with the positioning slider 510 in the connecting frame 231. When the trolley of this embodiment needs to be folded and stored, the telescopic rod 210 shrinks in the outer rod sleeve 220, driving the top block 520 to move, and the top block 520 pushes the positioning slider 510 to move it out of the locking hole of the sliding sleeve 230 and the outer rod sleeve 220. At this time, the sliding sleeve 230 and the outer rod sleeve 220 are unlocked, and the sliding sleeve 230 is moved to slide upward along the outer rod sleeve 220, and the positioning slider 510 moves along the outer wall of the outer rod sleeve 220 with the sliding sleeve 230. Since the outer rod sleeve 220 is hinged to the rear wheel rod 410, the front wheel rod 31 0 is hinged with the rear wheel rod 410, and the connecting frame 231, the front wheel rod 310 and the supporting plate are rotatably connected. Therefore, when the sliding sleeve 230 moves up, the rear wheel rod 410 and the front wheel rod 310 rotate close to the outer rod sleeve 220 until the outer rod sleeve 220, the front wheel rod 310 and the rear wheel rod 410 rotate to the maximum extent, thereby realizing the folding of the trolley frame; at the same time, since the two ends of the backrest bracket 140 are rotatably connected to the two sides of the rear end of the steering wheel 120, the backrest 112 is rotated close to the seat cushion 111, thereby realizing the folding of the trolley seat 110; and the steering wheel 120 can reciprocate around the center relative to the supporting plate 130, thereby realizing the steering of the seat 110. When the trolley needs to be unfolded, the telescopic rod 210 is stretched, and the movable sliding sleeve 230 can slide downward along the outer rod sleeve 220, and the outer rod sleeve 220, the rear wheel rod 410, and the front wheel rod 310 are linked until the positioning slider 510 in the connecting frame 231 re-enters the sliding sleeve 230 and the outer rod sleeve 220, thereby locking the sliding sleeve 230 and the outer rod sleeve 220.

[0035] In this embodiment, the end of the front wheel rod 310 is connected to the front wheel 600 of the vehicle, and the end of the rear wheel rod 410 is connected to the rear wheel 700 of the vehicle; a sunshade 150 is provided above the seat 110, and the sunshade 150 can be unfolded and folded to provide shade for children when riding in the stroller; a handle 160 is provided on the outer side of the rear end of the support plate 130 to facilitate carrying the stroller during and after the folding process.

[0036] In this embodiment, a push handle 240 is fixed on the top of the telescopic rod 210; the folding unlocking assembly 500 also includes a first unlocking button 530 and a pull wire 540, the first unlocking button 530 is arranged on the push handle 240, the first unlocking button 530 is connected to the pull wire 540, the pull wire 540 is located in the telescopic rod 210, and the end of the pull wire 540 away from the first unlocking button 530 is connected to the top block 520; a slope 521 is provided at the end of the top block 520, and the slope 521 forms an obtuse angle with the surface of the end of the top block 520, and one end of the positioning slider 510 can be adapted to fit with the slope 521 of the top block 520; a return spring is provided in the internal cavity of the positioning slider 510, and the other end of the return spring abuts against the inner wall of the connecting frame 231.

[0037] Specifically, in order to unlock the slide groove and the outer rod sleeve 220, and the telescopic rod 210 and the outer rod sleeve 220, by pressing the first unlocking button 530, the pull wire 540 connected to the first unlocking button 530 drives the top block 520 to move downward. Since the inclined surface 521 of the top block 520 fits well with one end of the positioning slider 510, the top block 520 moves downward while pushing the positioning slider 510 to move out of the outer rod sleeve 220 and the sliding sleeve 230, thereby unlocking the sliding sleeve 230 and the outer rod sleeve 220, that is, the telescopic rod 210 and the outer rod sleeve 220 are unlocked, and the sliding sleeve 230 is moved to slide upward along the outer rod sleeve 220, and the telescopic rod 210 shrinks downward and extends out of the bottom end of the outer rod sleeve 220, thereby realizing the subsequent folding action of the trolley.

[0038] In this embodiment, a second unlocking button 141 is provided on the top of the backrest bracket 140, and a first rotating sleeve 142 is provided at both ends of the backrest bracket 140. A first rotating part 121 is provided on both sides of the rear end of the steering wheel 120, and the first rotating sleeve 142 is snap-fitted and installed on the outside of the first rotating part 121 and fixed by the central axis; a fixing plate 143 and a positioning plate 144 are provided inside the first rotating sleeve 142, and the fixing plate 143 is fixed between the first rotating part 121 and the first rotating sleeve 142, and the positioning plate 144 is connected to the second unlocking button 141 through a pull wire 540, and a positioning groove 1431 is provided at the top of the fixing plate 143, and the positioning plate 144 can be inserted into or moved out of the positioning groove 1431; a protrusion 1211 is provided on the edge of the outer end surface of the first rotating part 121, and a groove 1432 adapted to the protrusion 1211 is provided on the edge of the fixing plate 143, and the protrusion 1211 is inserted into the groove 1432. Specifically, when the seat 110 is folded, the second unlocking button 141 is pressed to move the positioning piece 144 out of the positioning groove 1431, and the first rotating sleeve 142 and the first rotating part 121 are unlocked. At this time, the backrest bracket 140 can be rotated to make the backrest 112 close to the seat cushion 111, thereby realizing the folding of the seat 110.

[0039] In this embodiment, a card slot 122 is provided on the annular rib at the bottom of the steering wheel 120, a radially arranged accommodating groove 131 is provided inside the support plate 130, an unlocking key 132 is slidably provided in the accommodating groove 131, a return spring is provided between the unlocking key 132 and the partition in the accommodating groove 131, a card connecting portion 1321 is provided on the top of the unlocking key 132, and the card connecting portion 1321 can be inserted into or moved out of the card slot 122; a pulling portion 1322 is provided on one side of the unlocking key 132, a notch 133 is provided on the support plate 130, and the pulling portion 1322 of the unlocking key 132 is located at the notch 133. Specifically, when the direction of the seat 110 needs to be changed, the pulling part 1322 of the unlocking button 132 is pulled to move so that the snap-on part 1321 moves out of the slot 122. At this time, the steering wheel 120 can be rotated to 180°, and the reset spring rebounds the unlocking button 132 to return to its original position, and the snap-on part 1321 is snapped into another slot 122, thereby locking the steering wheel 120 and the support plate 130, and completing the change of the direction of the seat 110.

[0040] In order to facilitate children to step on, the cart of this embodiment is provided with a foot pedal 800 with an adjustable angle, and second rotating parts 810 are provided on both sides of the foot pedal 800. Second rotating sleeves 123 are provided on both sides of the front end of the steering wheel 120. The second rotating sleeves 123 are snap-fitted and installed on the outside of the second rotating part 810, and the second rotating part 810 can reciprocate relative to the second rotating sleeve 123. A gear 820 is slidably arranged between the second rotating part 810 and the second rotating sleeve 123, and the gear 820 can be engaged with the second rotating part 810 and the second rotating sleeve 123 at the same time, or be disengaged from the second rotating sleeve 123 and engaged with the second rotating part 810; a return spring is arranged between the gear 820 and the second rotating part 810, and a pressing cover 830 is arranged on the outer side of the second rotating sleeve 123, and the legs of the pressing cover 830 pass through the second rotating sleeve 123 and contact the gear 820; first bevel teeth 821 are evenly distributed on one end surface of the gear 820, and second bevel teeth 1231 cooperating with the first bevel teeth 821 are arranged inside the second rotating sleeve 123, and the first bevel teeth 821 are fitted with the inclined surfaces 521 of the second bevel teeth 1231. Specifically, when adjusting the foot pedal 800, by pressing the pressing cover 830, the gear 820 is disengaged from the second rotating sleeve 123 and completely pressed into the second rotating part 810. At this time, the foot pedal 800 can be rotated upward to adjust the angle and the pressing cover 830 can be loosened; when the foot pedal 800 is rotated downward, the foot pedal 800 can be directly rotated, and the gear 820 rotates accordingly, and the first bevel tooth 821 on the gear 820 also rotates along the second bevel tooth 1231 in the second rotating sleeve 123.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] Those skilled in the art to which the present application belongs may make various modifications or additions to the described specific embodiments or replace them in a similar manner, but they will not deviate from the spirit of the present application or exceed the scope defined by the attached claims.

Claims

1. A foldable stroller for children, characterized in that: It comprises a seat assembly (100), a push rod assembly (200), a front wheel rod assembly (300), a rear wheel rod assembly (400) and a folding unlocking assembly (500); The seat assembly (100) comprises a seat (110), a steering wheel (120) and a support plate (130); the steering wheel (120) is located below the seat (110); the seat (110) comprises a seat cushion (111) and a backrest (112); the front ends of the steering wheel (120) are fixedly connected to the seat cushion (111); the outer periphery of the backrest (112) is provided with a backrest bracket (140) in a ∩ shape; the rear ends of the steering wheel (120) are rotatably connected to the two ends of the backrest bracket (140); the support plate (130) is concentrically arranged below the steering wheel (120); the steering wheel (120) can reciprocate around the center relative to the support plate (130); The push rod assembly (200) comprises a telescopic rod (210), an outer rod sleeve (220) and a sliding sleeve (230); the outer rod sleeve (220) is sleeved on the outside of the telescopic rod (210); the telescopic rod (210) can reciprocate and retract inside the outer rod sleeve (220); the sliding sleeve (230) is sleeved on the outside of the outer rod sleeve (220); the sliding sleeve (230) can reciprocate and slide along the outer rod sleeve (220); one end of the sliding sleeve (230) is connected to a connection frame (231); The rear wheel rod group (400) comprises two rear wheel rods (410) arranged in parallel, the top ends of the two rear wheel rods (410) are hinged to the front end of the support plate (130), and the other ends are hinged to the outer rod sleeve (220); The front wheel rod group (300) comprises a front wheel rod (310), the front wheel rod (310) is arranged between the two rear wheel rods (410), the middle part of the front wheel rod (310) is hinged to the middle parts of the two rear wheel rods (410), the top end of the front wheel rod (310) is located inside the rear end of the support plate (130), the end of the connecting frame (231) away from the sliding sleeve (230) is located inside the top end of the front wheel rod (310), and the end of the connecting frame (231), the top end of the front wheel rod (310) and the rear end of the support plate (130) are rotatably connected; The folding unlocking component (500) comprises a positioning slider (510) and a top block (520), wherein the positioning slider (510) is partially located in the connecting frame (231), and the positioning slider (510) can enter or move out of the sliding sleeve (230), and the top block (520) is arranged in the telescopic rod (210), and the telescopic rod (210) is telescoped in the outer rod sleeve (220) to drive the top block (520) to move, and the top block (520) can contact or separate from one end of the positioning slider (510), so that the positioning slider (510) can enter or move out of the locking hole on one side of the outer rod sleeve (220).

2. A foldable child stroller according to claim 1, characterized in that: The end of the front wheel rod (310) is connected to the front wheel (600) of the vehicle, and the end of the rear wheel rod (410) is connected to the rear wheel (700) of the vehicle; a sunshade (150) is provided above the seat (110); and a handle (160) is provided on the outer side of the rear end of the support plate (130).

3. A foldable child stroller according to claim 1 or 2, characterized in that: A push handle (240) is fixed on the top of the telescopic rod (210); the folding unlocking assembly (500) also includes a first unlocking button (530) and a pull wire (540), wherein the first unlocking button (530) is arranged on the push handle (240), the first unlocking button (530) is connected to the pull wire (540), the pull wire (540) is located inside the telescopic rod (210), and the end of the pull wire (540) away from the first unlocking button (530) is connected to the top block (520).

4. A foldable child stroller according to claim 3, characterized in that: A slope (521) is provided at the end of the top block (520), and the slope (521) forms an obtuse angle with the surface of the end of the top block (520). One end of the positioning slider (510) can fit and fit with the slope (521) of the top block (520); a return spring is provided in the internal cavity of the positioning slider (510), and the other end of the return spring abuts against the inner wall of the connecting frame (231).

5. A foldable child stroller according to any one of claims 1, 2 or 4, characterized in that: A second unlocking button (141) is provided at the top of the backrest bracket (140), first rotating sleeves (142) are provided at both ends of the backrest bracket (140), first rotating parts (121) are provided at both sides of the rear end of the steering wheel (120), and the first rotating sleeve (142) is buckled and installed on the outside of the first rotating part (121) and fixed through the central axis; A fixing plate (143) and a positioning plate (144) are provided inside the first rotating sleeve (142); the fixing plate (143) is fixed between the first rotating portion (121) and the first rotating sleeve (142); the positioning plate (144) is connected to the second unlocking button (141) via a pull wire (540); a positioning groove (1431) is provided at the top end of the fixing plate (143); and the positioning plate (144) can be inserted into or removed from the positioning groove (1431).

6. A foldable child stroller according to claim 5, characterized in that: The outer end surface edge of the first rotating part (121) is provided with a protrusion (1211), and the edge of the fixing plate (143) is provided with a groove (1432) adapted to the protrusion (1211), and the protrusion (1211) is inserted into the groove (1432).

7. A foldable child stroller according to any one of claims 1, 2, 4 or 6, characterized in that: A clamping groove (122) is provided on the annular rib at the bottom of the steering wheel (120); a receiving groove (131) is radially provided inside the support plate (130); an unlocking key (132) is slidably provided in the receiving groove (131); a return spring is provided between the unlocking key (132) and a partition in the receiving groove (131); a clamping portion (1321) is provided on the top of the unlocking key (132); and the clamping portion (1321) can be clamped into or removed from the clamping groove (122).

8. A foldable child stroller according to claim 7, characterized in that: A pulling portion (1322) is provided on one side of the unlocking key (132), a notch (133) is provided on the supporting plate (130), and the pulling portion (1322) of the unlocking key (132) is located at the notch (133).

9. A foldable child stroller according to any one of claims 1, 2, 4, 6 or 8, characterized in that: The trolley further comprises a foot pedal (800), a second rotating portion (810) is provided on both sides of the foot pedal (800), a second rotating sleeve (123) is provided on both sides of the front end of the steering wheel (120), the second rotating sleeve (123) is buckled and mounted on the outside of the second rotating portion (810), and the second rotating portion (810) can reciprocate relative to the second rotating sleeve (123).

10. A foldable child stroller according to claim 9, characterized in that: A gear (820) is slidably arranged between the second rotating part (810) and the second rotating sleeve (123), and the gear (820) can be engaged with the second rotating part (810) and the second rotating sleeve (123) at the same time, or can be separated from the second rotating sleeve (123) and engaged with the second rotating part (810); A return spring is provided between the gear (820) and the second rotating part (810); a pressing cover (830) is provided on the outer side of the second rotating sleeve (123); a leg of the pressing cover (830) passes through the second rotating sleeve (123) and contacts the gear (820); first bevel teeth (821) are evenly distributed on one end surface of the gear (820); second bevel teeth (1231) cooperating with the first bevel teeth (821) are provided inside the second rotating sleeve (123); the first bevel teeth (821) and the second bevel teeth (1231) are in contact with each other.

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