Baby carriage convenient to fold and unfold

Abstract

The front end of a connecting piece is slidably and rotatably connected with the rear portion of a main beam, and the rear end of the connecting piece is rotatably connected with a push rod assembly, so that the rear portion of the main beam is relatively far away from the push rod assembly in the folding and unfolding process, and the situation that the rear end of the main beam interferes with the push rod assembly to affect the folding and unfolding effect is avoided. Smooth folding and unfolding are facilitated; the rear portion of the main beam is relatively attached to the push rod assembly when the main beam is folded or unfolded, so that the overall size of the folded buggy is smaller, storage and storage are convenient, and the overall structure of the unfolded buggy is more compact and firm in connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to a baby carriage technical field, especially a child's car of convenient folding. BACKGROUND

[0002] When parents take infants and young children out, they generally take a child's carriage. The traditional child's carriage is large in size and has no folding function or is still large in size after folding, so it is not suitable for long-distance or long-time family travel. Therefore, the portable folding carriage convenient to fold on the market has been widely used as a tool for infants and young children to walk.

[0003] With the improvement of living standards, people have higher and higher requirements for travel convenience. Therefore, the operability of the child's carriage when folding and the size of the child's carriage after folding have become the focus of consumers. More specifically, as for the folding child's carriage, the better the linkage of the components of the child's carriage, the easier the folding and unfolding operation, and vice versa. As for the size of the child's carriage after folding, in order to carry it when getting on and off the car or even the plane, of course, it is desirable that the size of the child's carriage after folding is as small as possible. Even when not in use and stored at home, the smaller the size, the less space it occupies.

[0004] The folding child's carriage in the prior art has a relatively complex structure, is large in size after folding, and has poor operability.

[0005] Therefore, the utility model is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at overcoming the defects of the prior art and provides a child's carriage convenient to fold and unfold. The front end of the connecting piece is slidably and rotatably connected with the rear part of the main beam, and the rear end is rotatably connected with the push rod assembly. The rear part of the main beam is relatively far away from the push rod assembly during folding and unfolding, so that the rear end of the main beam does not interfere with the push rod assembly, which helps to fold and unfold smoothly. When the rear part of the main beam is folded or unfolded, it is relatively close to the push rod assembly, so that the overall size of the child's carriage after folding is smaller, which is convenient for storage, and the overall structure of the child's carriage after unfolding is compact and firmly connected.

[0007] The utility model is implemented by the following technical solutions:

[0008] A child's carriage convenient to fold and unfold comprises a foldable frame, wherein the frame comprises:

[0009] A main beam 1, wherein the front end of the main beam 1 is connected with a front wheel set;

[0010] A rear leg 2, wherein the upper end of the rear leg 2 is rotatably connected with the middle part of the main beam 1, and the lower end of the rear leg 2 is connected with a rear wheel set;

[0011] a sliding member 11 slidably arranged at the front of the main beam 1 and slidable along the length direction of the main beam 1;

[0012] a linkage member 3, the front end of which is rotatably connected with the sliding member 11, and the rear end of which is rotatably connected with the upper part of the rear leg 2,

[0013] a push rod assembly 4, the lower end of which is rotatably connected with the lower part of the rear leg 2, and between the push rod assembly 4 and the rear end of the main beam 1, a frame locking mechanism 7 is arranged for locking the rear end of the main beam 1 relative to the push rod assembly 4 when the frame is unfolded, and the push rod assembly 4 or the main beam 1 is provided with a frame unlocking mechanism 74 for unlocking the linkage frame locking mechanism 7.

[0014] a connecting member 8, the front end of which is slidably and rotatably connected with the rear part of the main beam 1, and the rear end of which is rotatably connected with the push rod assembly 4.

[0015] The above-mentioned child stroller is convenient to fold and unfold, the rear part of the main beam 1 is provided with a guide sliding groove 12 extending along the length direction of the main beam 1, and the front end of the connecting member 8 is provided with a connecting protrusion 81 slidably arranged in the guide sliding groove 12.

[0016] The above-mentioned child stroller is convenient to fold and unfold, the push rod assembly 4 is provided with a support seat 9, the support seat 9 is provided with a support positioning groove 91 for clamping and positioning the rear end of the main beam 1 when the frame is unfolded, and the rear end of the connecting member 8 is hingedly connected with the support seat 9.

[0017] The above-mentioned child stroller is convenient to fold and unfold, the push rod assembly 4 is provided with a support seat 9, the support seat 9 is provided with a support positioning hole 92, the rear end of the main beam 1 is provided with a main beam positioning protrusion 13 for being inserted into the support positioning hole 92 when the frame is unfolded, and the rear end of the connecting member 8 is hingedly connected with the support seat 9.

[0018] The above-mentioned child stroller is convenient to fold and unfold, the support positioning hole 92 is a positioning counterbore arranged on the support seat 9, and a pushing elastic member for pushing the rear end of the main beam 1 is arranged in the positioning counterbore.

[0019] The above-mentioned child stroller is convenient to fold and unfold, further comprising a seat assembly, the seat assembly comprises a seat part 5 connected with the frame, and the seat part 5 is configured to be correspondingly folded and unfolded by the linkage of the frame during the folding and unfolding of the frame.

[0020] The above-mentioned child stroller is convenient to fold and unfold, the rear part of the seat part 5 is rotatably connected with the rear part of the main beam 1, a support member 51 is arranged between the front part of the seat part 5 and the sliding member 11, the upper end of the support member 51 is rotatably connected with the front part of the seat part 5, and the lower end of the support member 51 is rotatably connected with the sliding member 11.

[0021] The seat assembly further comprises a backrest part 6 rotatably connected to the rear side of the seat part 5, and a limiting structure is arranged between the backrest part 6 and the seat part 5 for limiting the backrest part 6 from continuously rotating backward after being unfolded, and a pull rope 61 is arranged between the upper end of the push rod assembly 4 and the backrest part 6 for pulling the backrest part 6 to unfold relative to the seat part 5 when the frame is unfolded, and for loosening the pulling of the backrest part 6 to make the backrest part 6 automatically fold to the seat part 5 when the frame is folded.

[0022] The backrest part 6 is provided with a backrest guide slot 60 at the rear part, and the lower end of the pull rope 61 is slidably arranged in the backrest guide slot 60.

[0023] The push rod assembly 4 comprises a lower push rod 41 rotatably connected to the lower part of the rear leg rod 2, the upper end of the lower push rod 41 is connected with an upper push rod 42 which can slide up and down relative to the lower push rod 41, a push rod locking mechanism 43 is arranged between the upper push rod 42 and the lower push rod 41 for locking the upper push rod 42 relative to the lower push rod 41, and the upper push rod 42 or the lower push rod 41 is provided with a push rod unlocking mechanism 44 for linkage with the unlocking action of the push rod locking mechanism 43; the upper end of the pull rope 61 is connected with the upper end of the upper push rod 42.

[0024] The frame locking mechanism 7 is located between the rear end of the main beam 1 and the lower push rod 41; when the upper push rod 42 slides downward relative to the lower push rod 41, the pull rope 61 loosens the pulling of the backrest part 6 to make the backrest part 6 automatically fold to the seat part 5, and the frame unlocking mechanism 74 linkage with the unlocking action of the frame locking mechanism 7 to release the locking state of the rear end of the main beam 1 relative to the push rod assembly 4.

[0025] Compared with the prior art, the utility model has the advantages of:

[0026] 1、The utility model discloses a push rod assembly 4, which comprises a lower push rod 41 rotatably connected to the lower part of the rear leg rod 2, the upper end of the lower push rod 41 is connected with an upper push rod 42 which can slide up and down relative to the lower push rod 41, a push rod locking mechanism 43 is arranged between the upper push rod 42 and the lower push rod 41 for locking the upper push rod 42 relative to the lower push rod 41, and the upper push rod 42 or the lower push rod 41 is provided with a push rod unlocking mechanism 44 for linkage with the unlocking action of the push rod locking mechanism 43; the upper end of the pull rope 61 is connected with the upper end of the upper push rod 42.

[0027] 2、In folding, the operation frame unlocking mechanism linkage frame locking mechanism release to remove the main beam rear end relative to the push rod assembly locking state, then make the main beam rear part around the rear foot rod upper end and the main beam middle part between the axis of rotation upward rotation and make the main beam rear part and push rod assembly face to face folding, in the above main beam rotation process, the main beam front part through linkage piece linkage rear foot rod around the rear foot rod upper end and the main beam middle part between the axis of rotation face to face rotation close, while the sliding piece to the main beam front end direction sliding, sliding piece through the support piece drive seat part front part around the seat part rear part and the main beam rear part between the axis of rotation to the main beam side rotation close, thereby complete the folding work of the whole child car, for this utility model has the characteristics of simple structure, small overall volume after folding, convenient operation.

[0028] 3、The utility model discloses through the support positioning hole and main beam positioning convex cooperation connection, can play the support, positioning, spacing effect to the main beam rear end, ensure that the main beam rear end and push rod assembly between structure stable and reliable, further improve the structural strength and stability of frame, guarantee the use safety reliable of child car.

[0029] 4、Positioning counterbore is equipped with the elastic element for pushing the main beam rear end, when the main beam rear end relative to push rod assembly is in the unlocking state, the elastic element makes the main beam rear end have the tendency of upward movement, thereby facilitating folding.

[0030] 5、The utility model discloses being equipped with the pull rope between the push rod assembly upper end and the backrest part for pulling the backrest part relative to the seat part when frame unfolding and for loosening the pull of backrest part when frame folding and making the backrest part automatically close to the seat part and fold, when folding frame, frame loosens the pull of backrest part through pull rope and makes the backrest part automatically close to the seat part and fold, has the characteristics of convenient folding, when unfolding frame, frame pulls the backrest part relative to the seat part through pull rope and unfolds, and frame can also make the backrest part keep in the unfolded state through pull rope, has the characteristics of convenient unfolding and stable and reliable use.

[0031] 6、The backrest part rear part is equipped with backrest guide slot, and the lower end of pull rope is slidably arranged in the backrest guide slot, in the process that the backrest part switches from the folding state to the unfolded state, the upper push rod drives the pull rope to move upward, makes the lower end of pull rope slide along the backrest guide slot from the lower part position of backrest part to the upper part position of backrest part, thereby changes the pulling point of pull rope pulling backrest part, facilitates pulling backrest part relative to the seat part to turn over and unfold back, saves labor, saves pull rope. ACCURATE DRAWINGS

[0032] The specific implementation of the utility model will be further explained in combination with the drawings, wherein:

[0033] Figure 1 It is one of the perspective views of the utility model.

[0034] Figure 2 Figure 2 is a perspective view of the utility model.

[0035] Figure 3 Figure 4 is a side view of the utility model in the unfolded use state.

[0036] Figure 4 Figure 5 is a side view of the utility model in the folding process.

[0037] Figure 5 Figure 6 is a side view of the utility model in the folded state.

[0038] Figure 6 Figure 7 is a sectional view of the push rod locking mechanism in the utility model.

[0039] Figure 7 Figure 8 is a sectional view of the vehicle frame locking mechanism in the utility model.

[0040] Figure 8 Figure 9 is an exploded view of the push rod unlocking mechanism in the utility model.

[0041] Figure 9 Figure 10 is a structural schematic view of the support seat and the connecting piece in cooperation in the utility model. DETAILED DESCRIPTION

[0042] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0043] As shown in Figures 1-9 the utility model discloses a folding and unfolding convenient child bicycle, including the foldable vehicle frame, the vehicle frame includes:

[0044] main beam 1, the main beam 1 front end is connected with front wheel group;

[0045] rear foot pole 2, the rear foot pole 2 upper end is rotatably connected with the middle part of main beam 1, and the rear foot pole 2 lower end is connected with rear wheel group;

[0046] sliding piece 11, the sliding piece 11 is slidably arranged in the front part of main beam 1 and can slide along the length direction of main beam 1;

[0047] linkage 3, the linkage 3 front end is rotatably connected with sliding piece 11, and the linkage 3 rear end is rotatably connected with the upper part of rear foot pole 2,

[0048] push rod assembly 4, the push rod assembly 4 lower end is rotatably connected with the lower part of rear foot pole 2, and the push rod assembly 4 and the rear end of main beam 1 are equipped with vehicle frame locking mechanism 7 for locking the rear end of main beam 1 relative to push rod assembly 4 when vehicle frame is unfolded, and the vehicle frame unlocking mechanism 74 for linkage vehicle frame locking mechanism 7 unlocking action is arranged on push rod assembly 4 or main beam 1;

[0049] The utility model discloses a connecting piece 8, the connecting piece 8 front end is slidably and rotatably connected with the main beam 1 rear part, and the connecting piece 8 rear end is rotatably connected with the push rod assembly 4. The utility model discloses a connecting piece front end is slidably and rotatably connected with the main beam rear part and rear end is rotatably connected with the push rod assembly, makes the main beam rear part relatively far away from the push rod assembly in the process of folding and unfolding, avoids the interference of the main beam rear end and the push rod assembly and influences the folding and unfolding effect, is favorable to the folding and unfolding smoothly, and the main beam rear part is relatively attached to the push rod assembly when folding or unfolding, makes the overall volume of the child's car smaller after folding, and the overall structure of the child's car is relatively compact after unfolding, and the connection is firm.

[0050] When folding, the operation frame unlocking mechanism releases the lock of the frame locking mechanism to release the locking state of the main beam rear end relative to the push rod assembly, then the main beam rear part is rotated upward around the rotation axis between the rear foot rod upper end and the main beam middle part to make the main beam rear part and the push rod assembly close to each other, in the above-mentioned main beam rotating process, the main beam front part is connected with the rear foot rod through the linkage to rotate around the rotation axis between the rear foot rod upper end and the main beam middle part and close to each other, and the sliding part slides to the main beam front end direction, the sliding part drives the seat part front part to rotate around the rotation axis between the seat part rear part and the main beam rear part to the main beam side and close to each other, thereby completing the folding work of the whole child's car, and the utility model has the characteristics of simple structure, small overall volume after folding and convenient operation.

[0051] As shown in Figure 7 , in order to lock reliably, the frame locking mechanism 7 includes a frame locking hole 71 arranged on the lower push rod 41 and a frame locking bolt 72 slidably arranged on the rear end of the main beam 1 and capable of being inserted into the frame locking hole 71, and the frame locking bolt 72 and the rear end of the main beam 1 are provided with a frame locking elastic element 73 capable of allowing the frame locking bolt 72 to be elastically inserted into the frame locking hole 71.

[0052] As shown in Figures 1-5 , 7, 9, the rear part of the main beam 1 is provided with a guide sliding groove 12 along the length direction of the main beam 1, and the front end of the connecting piece 8 is provided with a connecting protrusion 81 slidably arranged in the guide sliding groove 12. In the frame folding process, the rear end of the main beam is connected with the guide sliding groove through the connecting protrusion to avoid the push rod assembly from separating from the rear end of the main beam and tilting backward, so that the connection between the rear part of the main beam and the push rod assembly is ensured whether the frame is in the folded state or the unfolded state, and the folding and unfolding are facilitated. In the embodiment, when the frame is unfolded, the connecting protrusion 81 abuts against the rear end wall (upper end wall) of the guide sliding groove 12 to limit the position, improve the structural strength between the main beam and the push rod assembly, and ensure the safe and reliable use. In the folding process of the embodiment, the connecting protrusion 81 is separated from the rear end wall (upper end wall) of the guide sliding groove 12 to limit the position, and the rear part of the main beam is connected with the guide sliding groove through the connecting protrusion to avoid the push rod assembly from separating from the rear end of the main beam and tilting backward. Figure 4 、 5As shown, pulling the rear of the main beam upward causes the connecting protrusion 81 to slide from the rear end wall (upper end wall) of the guide groove 12 to the front end wall (lower end wall) of the guide groove 12 until the connecting protrusion 81 abuts against the front end wall (lower end wall) of the guide groove 12. At this time, the distance between the axis of the main beam and the axis of the push rod assembly is the length of the connecting piece 8. Then, pulling the rear of the main beam continues to move upward so that the rear of the main beam drives the connecting piece 8 to rotate around the rotation axis between the rear end of the connecting piece 8 and the push rod assembly 4, thereby causing the rear of the main beam 1 to rotate and move closer to the push rod assembly 4, so that the distance between the axis of the main beam and the axis of the push rod assembly gradually decreases.

[0053] In some other embodiments, the rear of the main beam 1 is provided with a sliding seat that can slide along the length of the main beam 1. The sliding seat is rotatably connected to the front end of the connector 8, which is not shown in the figure.

[0054] like Figure 9 As shown, the push rod assembly 4 is provided with a support seat 9, and the support seat 9 is provided with a support positioning groove 91 for the rear end of the main beam 1 to be engaged and positioned when the frame is unfolded. This groove provides support, positioning, and limiting for the rear end of the main beam, ensuring structural stability and reliability between the rear end of the main beam and the push rod assembly, further improving the structural strength and stability of the frame, and ensuring the safe and reliable use of the children's stroller. In this embodiment, as... Figures 1-5 As shown in Figures 9 and 9, the support base 9 is provided with support recesses 93 on both sides of the support positioning groove 91, and the rear end of the main beam 1 is provided with a main beam protrusion 14 for engaging the corresponding support recesses 93 when the frame is unfolded.

[0055] In this invention, the rear end of the connector 8 is hinged to the front side of the support base 9.

[0056] like Figure 7 , 9 As shown, the push rod assembly 4 is provided with a support seat 9, and the support seat 9 is provided with a support positioning hole 92. The rear end of the main beam 1 is provided with a main beam positioning protrusion 13 for inserting into the support positioning hole 92 when the frame is unfolded. When the frame unlocking mechanism is linked with the frame locking mechanism to release the locking state of the rear end of the main beam relative to the push rod assembly, at this time, because the main beam positioning protrusion 13 is inserted into the support positioning hole 92 and the rear end of the main beam 1 is engaged in the support positioning groove 91, if there is no upward pulling force on the rear end of the main beam 1, the rear end of the main beam will still remain engaged on the support seat, which has the characteristic of reliable locking. In addition, the engagement between the main beam positioning protrusion 13 and the support positioning hole 92 can restrict the radial movement of the rear end of the main beam relative to the push rod assembly, that is, restrict the movement of the rear end of the main beam in the front-back and left-right directions.

[0057] The support positioning hole 92 is a positioning counterbore provided on the support base 9, and an elastic pushing member for pushing the rear end of the main beam 1 is arranged in the positioning counterbore. When the rear end of the main beam is in an unlocked state relative to the push rod assembly, the elastic pushing member makes the rear end of the main beam have a tendency to move upward, thereby facilitating folding. In addition, when the locking end of the frame locking bolt is inserted into the frame locking hole, the elastic pushing member pushes the rear end of the main beam, so that the locking end of the frame locking bolt is in close contact with the inner wall of the frame locking hole, thereby preventing the frame locking bolt from shaking relative to the frame locking hole and being abraded and making noise, thus prolonging the service life of the frame locking mechanism and improving the comfort of use.

[0058] As shown in Figures 1-5 In order to facilitate use, the rear end of the main beam 1 is connected with a pull ring 15 for being pulled by a user.

[0059] As shown in Figures 1-5 In order to facilitate folding and unfolding, the seat assembly includes a seat part 5 connected with the frame, and the seat part 5 is configured to be correspondingly folded and unfolded by the linkage of the frame during folding and unfolding of the frame.

[0060] As shown in Figures 1-5 In order to facilitate folding and unfolding, the rear part of the seat part 5 is rotatably connected with the rear part of the main beam 1, and a support member 51 is arranged between the front part of the seat part 5 and the sliding member 11, the upper end of the support member 51 is rotatably connected with the front part of the seat part 5, and the lower end of the support member 51 is rotatably connected with the sliding member 11.

[0061] As shown in Figures 1-5 In order to facilitate folding and unfolding, the seat assembly further includes a backrest part 6 rotatably connected with the rear side of the seat part 5, and a limiting structure for limiting the backrest part 6 from continuously rotating backward after being unfolded is arranged between the backrest part 6 and the seat part 5, and a pull rope 61 for pulling the backrest part 6 to unfold relative to the seat part 5 when the frame is unfolded and for loosening the pulling of the backrest part 6 to make the backrest part 6 automatically approach and fold to the seat part 5 when the frame is folded is arranged between the upper end of the push rod assembly 4 and the backrest part 6. Thus, when the frame is folded, the frame loosens the pulling of the backrest part by the pull rope to make the backrest part automatically approach and fold to the seat part, thereby facilitating folding; when the frame is unfolded, the frame pulls the backrest part to unfold relative to the seat part by the pull rope, and the frame can also make the backrest part remain in the unfolded state by the pull rope, thereby facilitating unfolding and being stable and reliable in use.

[0062] As shown in Figures 1-5 The rear part of the backrest part 6 is provided with a backrest guide slot 60, and the lower end of the pull rope 61 is slidably arranged in the backrest guide slot 60. During switching of the backrest part from the folded state to the unfolded state, the upper push rod drives the pull rope to move upward, so that the lower end of the pull rope slides along the backrest guide slot from the lower part of the backrest part to the upper part of the backrest part.Figures 1-3 As shown, by changing the connection position of the lower end of the pull rope and the backrest part, the pulling point of the pull rope pulling the backrest part is changed, which facilitates the pulling of the backrest part to flip and unfold relative to the seat part, saves labor and pull rope. In some embodiments, a sliding block is slidably arranged in the backrest guide groove 60, and the lower end of the pull rope 61 is connected with the sliding block.

[0063] As shown, Figures 1-8 In order to make the overall size of the folded frame smaller and the structure more compact, the push rod assembly 4 includes a lower push rod 41 rotatably connected with the lower part of the rear leg rod 2, the upper end of the lower push rod 41 is connected with an upper push rod 42 which can slide up and down relative to the lower push rod 41, a push rod locking mechanism 43 is arranged between the upper push rod 42 and the lower push rod 41 for locking the upper push rod 42 relative to the lower push rod 41, and a push rod unlocking mechanism 44 is arranged on the upper push rod 42 or the lower push rod 41 for linkage unlocking action of the push rod locking mechanism 43; the upper end of the pull rope 61 is connected with the upper end of the upper push rod 42.

[0064] As shown, Figure 6 , 8 In order to lock more stably and reliably, the push rod locking mechanism 43 includes a push rod locking hole 431 arranged on the lower push rod 41 and a push rod locking block 432 slidably arranged on the upper push rod 42 and capable of being inserted into the push rod locking hole 431, a push rod elastic element 433 is arranged between the push rod locking block 432 and the upper push rod 42 to enable the push rod locking block 432 to be elastically inserted into the push rod locking hole 431, and the push rod unlocking mechanism 44 is used for linkage unlocking action of the push rod locking block 432.

[0065] As shown, Figure 6 , 8 In order to unlock conveniently, the push rod unlocking mechanism 44 includes a push rod unlocking block 441 vertically slidably arranged on the upper push rod 42, the push rod unlocking block 441 is provided with an unlocking block inclined surface 4411, the push rod locking block 432 is provided with a locking block inclined surface 4321 matched with the unlocking block inclined surface 4411 for unlocking, the push rod unlocking mechanism 44 further includes a push rod unlocking button 443 arranged on the upper push rod 42, and a linkage vertical rod 442 is arranged between the push rod unlocking button 443 and the push rod unlocking block 441.

[0066] As shown, Figure 6 , 8 In order to avoid misoperation and ensure safety, the push rod unlocking button 443 and the upper push rod 42 are provided with a safety locking mechanism 45. In this embodiment, the structure of the safety locking mechanism 45 is the same as that of the frame locking mechanism 7 or the push rod locking mechanism 43, which will not be repeated here.

[0067] As shown, Figures 1-8As shown, in order to unlock conveniently and simplify structure, the frame locking mechanism 7 is located between the rear end of the main beam 1 and the lower push rod 41; when the upper push rod 42 slides downward relative to the lower push rod 41, the pull rope 61 releases the pulling on the backrest part 6, so that the backrest part 6 automatically approaches and folds the seat part 5, the frame unlocking mechanism 74 links the frame locking mechanism 7 to unlock, and the locking state of the rear end of the main beam 1 relative to the push rod assembly 4 is released. In this embodiment, only the operation of sliding the upper push rod 42 downward relative to the lower push rod 41 can release the locking state of the backrest part 6 relative to the seat part 5 and the locking state of the rear end of the main beam 1 relative to the push rod assembly 4.

Claims

1. A stroller which is easy to fold, characterized in that The utility model relates to a foldable bicycle frame, comprising: a main beam (1) having a front wheel set connected to a front end of the main beam (1); a rear leg (2) having a rear wheel set connected to a lower end of the rear leg (2), and a middle part of the rear leg (2) being rotatably connected to an upper end of the rear leg (2); a sliding member (11) slidably arranged on a front part of the main beam (1) and being slidable along a length direction of the main beam (1); a linkage member (3) having a front end rotatably connected to the sliding member (11) and a rear end rotatably connected to an upper part of the rear leg (2); a push rod assembly (4) having a lower end rotatably connected to a lower part of the rear leg (2), and a bicycle frame locking mechanism (7) arranged between the push rod assembly (4) and a rear end of the main beam (1) for locking the rear end of the main beam (1) relative to the push rod assembly (4) when the bicycle frame is unfolded, and a bicycle frame unlocking mechanism (74) arranged on the push rod assembly (4) or the main beam (1) for unlocking the bicycle frame locking mechanism (7); a connecting member (8) having a front end slidably and rotatably connected to a rear part of the main beam (1) and a rear end rotatably connected to the push rod assembly (4).

2. The stroller of claim 1, wherein The rear part of the main beam (1) is provided with a guide sliding groove (12) extending along the length direction of the main beam (1), and the front end of the connecting member (8) is provided with a connecting protrusion (81) slidably arranged in the guide sliding groove (12).

3. The compact foldable stroller of claim 1, wherein The push rod assembly (4) is provided with a support seat (9), and the support seat (9) is provided with a support positioning groove (91) for positioning the rear end of the main beam (1) when the bicycle frame is unfolded; and the rear end of the connecting member (8) is hingedly connected to the support seat (9).

4. The stroller of claim 1, wherein The push rod assembly (4) is provided with a support seat (9), and the support seat (9) is provided with a support positioning hole (92), and the rear end of the main beam (1) is provided with a main beam positioning protrusion (13) for being inserted into the support positioning hole (92) when the bicycle frame is unfolded; and the rear end of the connecting member (8) is hingedly connected to the support seat (9).

5. The stroller of claim 4, wherein The support positioning hole (92) is a positioning counterbore arranged on the support seat (9), and a top-pushing elastic member is arranged in the positioning counterbore for top-pushing the rear end of the main beam (1).

6. The stroller of any one of claims 1-5, wherein The utility model further comprises a seat assembly, the seat assembly comprising a seat part (5) connected to the bicycle frame, and the seat part (5) being configured to be correspondingly folded and unfolded by the bicycle frame during folding and unfolding of the bicycle frame.

7. The stroller of claim 6, wherein The rear part of the seat part (5) is rotatably connected to the rear part of the main beam (1), and a support member (51) is arranged between the front part of the seat part (5) and the sliding member (11), the upper end of the support member (51) being rotatably connected to the front part of the seat part (5), and the lower end of the support member (51) being rotatably connected to the sliding member (11).

8. The stroller of claim 6, wherein The seat assembly further comprises a backrest part (6) rotatably connected with the lower part of the seat part (5), and a limiting structure is arranged between the backrest part (6) and the seat part (5) for limiting the backrest part (6) from rotating further backward after being unfolded, and a pull rope (61) is arranged between the upper end of the push rod assembly (4) and the backrest part (6) for pulling the backrest part (6) to unfold relative to the seat part (5) when the frame is unfolded, and for loosening the pulling of the backrest part (6) to make the backrest part (6) automatically fold to the seat part (5) when the frame is folded.

9. The stroller of claim 8, wherein The backrest part (6) is provided with a backrest guide slot (60), and the lower end of the pull rope (61) is slidably arranged in the backrest guide slot (60).

10. The stroller of claim 8, wherein The push rod assembly (4) comprises a lower push rod (41) rotatably connected with the lower part of the rear leg rod (2), and the upper end of the lower push rod (41) is connected with an upper push rod (42) which can slide up and down relative to the lower push rod (41), and a push rod locking mechanism (43) is arranged between the upper push rod (42) and the lower push rod (41) for locking the upper push rod (42) relative to the lower push rod (41), and a push rod unlocking mechanism (44) is arranged on the upper push rod (42) or the lower push rod (41) for linkage with the unlocking action of the push rod locking mechanism (43); and the upper end of the pull rope (61) is connected with the upper end of the upper push rod (42).

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