WO2007033562A1 - A child stroller - Google Patents

Abstract

A child stroller is composed of a main push frame, which consists of a main front wheel frame, a main rear wheel frame, a main seat structure and a main seat provided on the main seat structure. The child stroller further includes an additional push frame, which consists of an additional wheel frame, an additional seat structure, an additional seat provided on the additional seat structure. An additional wheel assembly is provided on the lower end of the additional wheel frame. The main push frame and the additional frame is detachably connected to each other, so that there is a first working state in which the main push frame and the additional frame are separated and a second working state in which the main push frame and the additional frame are connected. Under the first working state, the main push frame forms a single child stroller. Under the second working state, the main push frame and the additional push frame form a dual-children stroller.

Description

 Baby carriage

 The invention relates to a stroller. Background technique

 In the prior art, the stroller is a single stroller, and the stroller usually includes a stroller frame. The stroller includes a front wheel bracket, a rear wheel bracket, a seat mechanism, and is disposed on the seat mechanism. One seat, this single stroller can only be used by one child. When two children are to be promoted, the single stroller cannot be used; there is also a double stroller, which usually includes a stroller. The cart frame includes a front wheel bracket, a rear wheel bracket, two seat mechanisms disposed between the front wheel bracket and the rear wheel bracket, and two seats respectively disposed on the two seat mechanisms, the double stroller It can be used by two children, but when only one child is needed, the operator usually chooses a single stroller because the double stroller is bulky and difficult to implement than a single stroller. It can be seen that the stroller in the form of single child stroller and twin stroller has limitations in its scope of use. Summary of the invention

 SUMMARY OF THE INVENTION It is an object of the present invention to provide a stroller that is widely used and that the stroller operator can assemble the stroller into a single stroller or a twin stroller as needed.

The technical solution of the present invention is: a baby carriage comprising a main cart frame, the main cart frame comprising a main front wheel bracket, a main rear wheel bracket, a main seat mechanism, and a baby seat provided on the main seat mechanism In the main seat, the stroller further includes a stroller frame, the stroller frame includes a wheel bracket, a seat mechanism, and a seat for the infant to be seated on the seat mechanism. The lower end portion of the appendage wheel bracket is provided with a reel assembly, the main cart frame being detachably connected with the cart frame, so that the cart frame and the main cart frame are a first working state with phase separation, and a second working state in which the cart frame is connected to the main cart frame, and the cart frame and the main cart frame are in the In a working state, the lower front end of the main front wheel bracket is provided with a main front wheel assembly, the lower end portion of the main rear wheel bracket is provided with a main rear wheel assembly, and the main cart frame is provided with a push handle Rod, the main cart frame constitutes an independent a single cart; in the second working state of the attached cart frame and the main cart frame, the lower end portion of the main front wheel bracket, and the lower end portion of the main rear wheel bracket Set on at least one part a wheel assembly, the main cart frame or the cart frame is provided with a push rod, the attached seat is located in front of the main seat or behind the main seat, The main cart frame and the attached cart frame constitute a separate double cart.

 When the cart frame and the main cart frame are in a second working state, the lower front end of the main front wheel bracket is provided with a main front wheel assembly, and the lower end portion of the main rear wheel bracket is disposed There is a main rear wheel assembly.

 When the cart frame and the main cart frame are in a second working state, the attached seat is located in front of the main seat, and the rear portion of the cart frame and the The front portion of the main cart frame is detachably connected, the main cart frame is provided with a push rod, and the lower end portion of the main rear wheel bracket is provided with a main rear wheel assembly.

 When the cart frame and the main cart frame are in a second working state, the front portion of the cart frame is detachably connected with an auxiliary tray or a front armrest, when the attached The cart frame and the main cart frame are in a first working state, and the accommodating tray or the front armrest is detachably connected to the front portion of the main cart frame.

 The rear portion of the cart frame is connected with a main serving tray or a main front armrest. When the cart rack and the main cart rack are in a second working state, the main tray or the main tray The front armrest is located in front of the front seat of the main seat.

 The cart frame further includes a side armrest with a front end portion connected to an upper end portion of the appendage wheel bracket, the attached seat mechanism including a seat connecting rod, and a front end portion of the attached seat link Connected to the attached wheel bracket, when the cart frame and the main cart frame are in a second working state, the rear portion of the side armrest is connected to the main cart frame And having a first locking mechanism between the two, when the cart frame and the main cart frame are in a second working state, the rear portion of the attached link and the main cart The racks are connected and have a second locking mechanism therebetween.

 The main cart frame further includes a main side armrest having a front end portion connected to an upper end portion of the main front wheel bracket, and a push rod connected to a rear end portion of the main side armrest, the main An upper end portion of the rear wheel bracket is coupled to the main side armrest, and the main seat mechanism includes a main seat link between the main front wheel bracket and the main rear wheel bracket, when When the cart frame and the main cart frame are in the second working state, the rear portion of the side armrest is connected to the front portion of the main side armrest, and the attached connecting rod is The rear portion is coupled to the front portion of the main seat link.

When the cart frame and the main cart frame are in a second working state, the front side of the side armrest is detachably connected with an auxiliary tray or a front armrest, when the push Frame and said The main cart frame is in a first working state, and the accommodating tray or the front armrest is detachably coupled to the front portion of the main side armrest.

 When the attached cart frame and the main cart frame are in a second working state, the attached seat is located behind the main seat, the front part of the attached cart frame and the The rear part of the main cart frame is detachably connected, the attached child carriage is provided with a push rod, and the lower front end of the main front wheel bracket is provided with a main front wheel assembly.

 When the cart frame and the main cart frame are in a second working state, the push rod is detachably connected to the rear of the cart frame, when the push The frame and the main cart frame are in a first working state, and the push rod is detachably connected to the rear portion of the main cart frame.

 The front portion of the main cart frame is connected with a main dinner plate or a main front armrest.

 The rear portion of the main cart frame is connected with an auxiliary tray or a front armrest.

 The cart frame further includes an attached side armrest with a front portion connected to an upper end portion of the appendage wheel bracket, and an extension lever connecting the upper end portion to a rear end portion of the side armrest. The attached seat mechanism includes a seat connecting rod, and a rear end portion of the attached link is connected to the attached wheel bracket, when the attached cart frame is in the same manner as the main cart frame In a second working state, the front portion of the side armrest is connected to the rear portion of the main cart frame, and has a first locking mechanism therebetween, when the cart frame is The main cart frame is in the second working state, and the front portion of the attached link is connected to the rear portion of the main cart frame with a second locking mechanism therebetween.

 The main cart frame further includes a main side armrest with a front end portion connected to an upper end portion of the main front wheel bracket, and a main push rod connecting rod whose upper end portion is connected to a rear end portion of the main side armrest. The upper end portion of the main rear wheel bracket is connected to the main side armrest, and the main seat mechanism includes a main seat link between the main front wheel bracket and the main rear wheel bracket When the attached cart frame and the main cart frame are in a second working state, the front portion of the side armrest is connected to the rear portion of the main side armrest, and the attached seat A front portion of the connecting rod is coupled to a rear portion of the main seat link.

 When the main cart frame and the attached cart frame are in a second working state, the push rod is detachably connected to the push rod link, when the main cart The carriage and the attached cart frame are in a first working state, and the push rod is detachably coupled to the main push rod link.

The main dinner plate or the main front armrest is connected to the front portion of the main side armrest, and the rear side of the main side armrest is connected with an auxiliary tray or a front armrest. Compared with the prior art, the present invention has the following advantages: Since the stroller includes a main cart frame having a main seat, a stroller rack with a seat attached, the main cart frame and the attached cart frame Removably connected between them, when the two children need to be pushed forward, the main cart frame is connected with the attached cart frame to be assembled into a double stroller, and when only one child needs to be pushed, the main cart is The frame is separated from the attached cart frame, so that the main cart frame is assembled into a single stroller, and thus the use range is wide. DRAWINGS

 Figure 1 is a perspective view of the present invention (the first embodiment is in a second working state);

 Figure 2 is a perspective view of the main cart frame forming an independent single-person cart (first embodiment); Figure 3 is an exploded view of the present invention (first embodiment);

 Figure 4 is an enlarged view of A of Figure 3;

 Figure 5 is an enlarged view of a portion B of Figure 3;

 Figure 6 is an enlarged view of a portion C of Figure 3;

 Figure 7 is an enlarged view of a portion D of Figure 3;

 Figure 8 is an enlarged view of E of Figure 3;

 Figure 9 is a schematic view of the present invention (the first embodiment is in the second working state);

 Figure 10 is a cross-sectional view taken along line N-N of Figure 9;

 Figure 11 is an enlarged view of M of Figure 9;

 Figure 12 is a schematic view of the present invention (the second embodiment is in the second working state); Figure 13 is a schematic view of the conversion of the double stroller into a single cart (second embodiment);

 Among them: 1, the main cart frame; 2, with a cart frame; 3, the main seat mechanism; 4, with a seat mechanism; 5, the main rear wheel assembly; 6, the main front wheel assembly; 7, the wheel assembly; 8, push 9. The main rear wheel bracket; 10, the main front wheel bracket; 11, the wheel bracket; 12, the main seat link; 13, the attached rod; 16, the main plate; 17, the plate; 18 19, the side armrest; 19, the side armrest; 20, the first pin; 21, the second pin; 22, the third pin; 24, the first button; 25, the second button; 26, the third button; 27, the first locking mechanism; 28, the second locking mechanism; 29, the first locking hole; 30, the second locking hole; 31, the main push rod connecting rod; 32, the push rod connecting rod. detailed description

A baby carriage comprising a main cart frame 1 , the main cart frame 1 comprising a main front wheel bracket 10 , a main a rear wheel bracket 9, a main seat mechanism 3, a main seat for the infant to be seated on the main seat mechanism 3, the stroller further includes a stroller frame 2, the cart stroller 2 including a wheel bracket 11 , a seat mechanism 4 , a seat for the infant to be seated on the seat mechanism 4 , and a lower wheel end of the wheel bracket 11 is provided with a wheel assembly 7 , the main push The frame 1 is detachably coupled to the cart frame 2 such that the cart frame 2 has a first working state separated from the main cart frame 1 and the extension The frame 2 has a second working state connected to the main cart frame 1, and the main front wheel is in the first working state when the cart frame 2 and the main cart frame 1 are in a first working state. The lower end portion of the bracket 10 is provided with a main front wheel assembly 6, and the lower rear end portion of the main rear wheel bracket 9 is provided with a main rear wheel assembly 5, and the main cart frame 1 is provided with a push rod 8 The main cart frame 1 constitutes a stand-alone single-person cart; in the second working state, the cart rack 2 and the main cart rack 1 are in a second working state And at least one of the lower end portion of the main front wheel bracket 10 and the lower end portion of the main rear wheel bracket 9 is provided with a wheel assembly, the main cart frame 1 or the attached cart frame 2 is provided with a push rod 8 which is located in front of the main seat or behind the main seat, and the main cart frame 1 is independent of the attached cart frame 2 Double stroller.

First Embodiment, as shown in FIG. 1 to FIG. 11, a baby carriage including a main cart frame 1, the main cart frame 1 includes a main front wheel bracket 10, a main rear wheel bracket 9, and a main seat mechanism 3. a main seat for the infant to be seated on the main seat mechanism 3, the stroller further comprising a stroller frame 2, the cart stroller 2 including a wheel bracket 11 and a seat mechanism 4 a seat for the infant to be seated on the seat mechanism 4, the lower end of the wheel bracket 11 is provided with a reel assembly 7, the main cart frame 1 and the extension The frame 2 is detachably connected such that the cart frame 2 has a first working state separated from the main cart frame 1, and the cart frame 2 and the main cart are The frame 1 has a second working state, and the lower end of the main front wheel bracket 10 is provided with a main front when the cart frame 2 and the main cart frame 1 are in a first working state. The wheel assembly 6, the lower end portion of the main rear wheel bracket 9 is provided with a main rear wheel assembly 5, and the main cart frame 1 is provided with a push The main cart frame 1 constitutes a separate single-person cart; the main front wheel bracket 10 is in the second working state when the cart frame 2 and the main cart frame 1 are in a second working state. At least a lower end portion of the main rear wheel bracket 9 of the lower end portion of the main rear wheel bracket 9 is provided with a main rear wheel assembly 5, and the main cart frame 1 is provided with a push rod 8. The attached seat is located in front of the main seat, and the main cart frame 1 and the attached cart frame 2 constitute an independent double cart. When the cart frame 2 and the main cart frame 1 are in the second working state, as shown in FIG. 1 to FIG. 11, the attached seat is located in front of the main seat. The rear portion of the cart frame 2 is detachably coupled to the front portion of the main cart frame 1. The main cart frame 1 is provided with a push rod 8 and the main rear wheel bracket 9 The lower end portion is provided with a main rear wheel assembly 5.

 As shown in FIG. 1 and FIG. 9, when the cart frame 2 and the main cart frame 1 are in the second working state, the lower end portion of the main front wheel bracket 10 is provided with a main front. The wheel assembly 6, the lower end portion of the main rear wheel bracket 9 is provided with a main rear wheel assembly 5.

 When the cart frame 2 and the main cart frame 1 are in the second working state, the front portion of the cart frame 2 is detachably connected with the serving tray 17 or the front armrest, and A locking mechanism is disposed between the serving tray 17 and the front portion of the attached cart frame 2, as shown in FIG. 3, FIG. 8, and FIG. 9, the locking mechanism may be in the A third spring pin 22 is disposed on the feeding tray 17, and a third locking hole is formed in the attached cart frame 2, and the third spring pin 22 is inserted in the third locking hole when locked And a third button 26 is provided on the cart frame 2, and the locking mechanism can be unlocked by the third button 26. The accommodating tray 17 or the front armrest is detachably attached to the front portion of the main cart frame 1 when the cart frame 2 and the main cart frame 1 are in a first working state. Connection

 The rear portion of the cart frame 2 is connected with a main dinner plate 16 or a main front armrest. When the cart frame 2 and the main cart frame 1 are in a second working state, the main The tray 16 or the main front armrest is located in front of the front seat of the main seat.

The cart frame 2 further includes a side armrest 19 having a front end portion connected to an upper end portion of the applicator wheel bracket 11, the attached seat mechanism 4 including a mount link 13, the attached seat a front end portion of the connecting rod 13 is connected to the attached wheel bracket 11, and when the attached cart frame 2 and the main cart frame 1 are in a second working state, the rear side armrest 19 is rearward The portion is connected to the main cart frame 1 and has a first locking mechanism 27 therebetween. When the cart frame 2 and the main cart frame 1 are in a second working state, The rear portion of the attached link 13 is coupled to the main cart frame 1 with a second locking mechanism 28 therebetween. As shown in FIG. 3 - FIG. 8, FIG. 10, and FIG. 11, the first locking mechanism 27 may be provided with a first spring pin 20 on the side armrest 19, The main cart frame 1 is provided with a first locking hole 29. When locked, the first spring pin 20 is inserted into the first locking hole 29, and a first button 24 is disposed on the main cart frame 1. The first locking mechanism 27 can be unlocked by the first button 24 as described. The second locking mechanism 28 may be provided with a second spring pin 21 on the attached connecting rod 13 in the main cart A second locking hole 30 is defined in the frame 1. When locked, the second spring pin 21 is inserted into the second locking hole 30, and a second button 25 is disposed on the main cart frame 1 The second button 25 described can unlock the second locking mechanism 28. As shown in FIG. 2, when the cart frame 2 and the main cart frame 1 are in a first working state, the serving tray 17 or the front armrest and the main cart frame 1 are The front portion is detachably connected, and the accommodating tray 17 or the front armrest is locked with the main cart frame 1, and at this time, the accommodating tray 17 is The three spring pins 22 can be inserted into the first locking hole 29 on the main cart frame 1, and the first button 24 can be pressed to connect the serving tray 17 or the front armrest to the main cart frame 1 Unlock between the front.

 The main cart frame 1 further includes a main side armrest 18 having a front end portion connected to an upper end portion of the main front wheel bracket 10, and a push rod 8 connected to a rear end portion of the main side armrest 18. The upper end portion of the main rear wheel bracket 9 is connected to the main side armrest 18, and the main seat mechanism 3 includes the main front wheel bracket 10 and the main rear wheel bracket 9 The main seat link 12, when the cart frame 2 and the main cart frame 1 are in the second working state, the rear side of the side armrest 19 and the main side armrest The front portion of the 18 is connected, and the rear portion of the attached link 13 is coupled to the front portion of the main seat link 12. When the cart frame 2 and the main cart frame 1 are in the second working state, the front side of the side armrest 19 is detachably connected with the accommodating tray 17 or the front armrest. The cart frame 2 and the main cart frame 1 are in a first working state, and the accommodating tray 17 or the front armrest is detachably connected to the front portion of the main side armrest 18. The rear side of the side armrest 19 is connected to the main tray 16 or the main front armrest.

The second embodiment, as shown in FIG. 12 and FIG. 13, is a baby carriage including a main cart frame 1, the main cart frame 1 including a main front wheel bracket 10, a main rear wheel bracket 9, and a main seat mechanism 3. a main seat for the infant to be seated on the main seat mechanism 3, the stroller further comprising a stroller frame 2, the cart stroller 2 including a wheel bracket 11 and a seat mechanism 4 a seat for the infant to be seated on the seat mechanism 4, the lower end of the wheel bracket 11 is provided with a reel assembly 7, the main cart frame 1 and the extension The frame 2 is detachably connected such that the cart frame 2 has a first working state separated from the main cart frame 1, and the cart frame 2 and the main cart are The frame 1 has a second working state, and the lower end of the main front wheel bracket 10 is provided with a main front when the cart frame 2 and the main cart frame 1 are in a first working state. The wheel assembly 6, the lower end portion of the main rear wheel bracket 9 is provided with a main rear wheel assembly 5, which is arranged on the main cart frame 1 There is a push rod 8, the main cart frame 1 constitutes a separate single-person cart; in the second working state, the cart frame 2 and the main cart frame 1 are in a second working state, The lower front end portion of the main front wheel bracket 10 and the lower end portion of the main rear wheel bracket 9 are provided with a main front wheel assembly 6 at a lower end portion of the main front wheel bracket 10, the push The frame 2 is provided with a pusher bar 8, the attached seat being located behind the main seat, and the main cart frame 1 and the attached cart frame 2 constitute an independent double cart.

 When the cart frame 2 and the main cart frame 1 are in a second working state, the attached seat is located behind the main seat, and the front part of the cart frame 2 is The rear portion of the main cart frame 1 is detachably connected, and is locked after being connected. The cart frame 2 is provided with a push rod 8 and the lower end portion of the main front wheel bracket 10 is disposed. There is a main front wheel assembly 6.

 As shown in FIG. 12, when the cart frame 2 and the main cart frame 1 are in a second working state, the lower front end of the main front wheel bracket 10 is provided with a main front wheel assembly 6, The lower end portion of the main rear wheel bracket 9 is provided with a main rear wheel assembly 5.

 When the cart frame 2 and the main cart frame 1 are in the second working state, the push rod 8 is detachably connected to the rear of the cart frame 2, The cart frame 2 and the main cart frame 1 are in a first working state, and the push rod 8 is detachably connected to the rear portion of the main cart frame 1.

 The front portion of the main cart frame 1 is connected to a main serving tray 16 or a main front armrest.

 The rear portion of the main cart frame 1 is connected with a catering tray or a front armrest. When the cart frame 2 and the main cart frame 1 are in a second working state, the catering tray Or the front armrest is located on the front upper side of the attached seat.

The cart frame 2 further includes an attached side armrest 19 whose front portion is connected to the upper end portion of the applicator wheel bracket 11, and an attachment of the upper end portion to the rear end portion of the side armrest 19 The lever link 32, the attached seat mechanism 4 includes a seat link 13 , and the rear end portion of the attached link 13 is connected to the attached wheel bracket 11 when the attached cart The frame 2 and the main cart frame 1 are in a second working state, and the front portion of the side armrest 19 is connected to the rear portion of the main cart frame 1 with a first lock therebetween The mechanism ₂₇ , when the cart frame 2 and the main cart frame 1 are in a second working state, the front portion of the attached link 13 and the rear portion of the main cart frame 1 Connected, and with a second locking mechanism 28 therebetween.

The main cart frame 1 further includes a main side armrest 18 whose front end portion is connected to the upper end portion of the main front wheel bracket 10, and a main push of the upper end portion connected to the rear end portion of the main side armrest 18. a lever link 31, the upper end portion of the main rear wheel bracket 9 is coupled to the main side armrest 18, and the main seat mechanism 3 includes the main front wheel bracket 10 and the main rear Main seat between wheel brackets 9 a rod 12, when the cart frame 2 and the main cart frame 1 are in a second working state, the front portion of the side armrest 19 is connected to the rear portion of the main side armrest 18 The front portion of the attached link 13 is coupled to the rear portion of the main seat link 12. When the main cart frame 1 and the cart frame 2 are in a second working state, the push rod 8 is detachably connected to the push rod link 32. The main cart frame 1 and the cart frame 2 are in a first working state, and the push rod 8 is detachably connected to the main push rod link 31. The main dining tray 16 or the main front armrest is connected to the front portion of the main side armrest 18, and the rear side of the main side armrest 18 is connected with an auxiliary tray or a front armrest.

Claims

Rights request:  A baby carriage comprising a main cart frame (1), the main cart frame (1) comprising a main front wheel bracket (10), a main rear wheel bracket (9), a main seat mechanism (3), and a setting The main seat for infants on the main seat mechanism (3) is characterized in that: the stroller further includes a stroller frame (2), and the stroller frame (2) includes a wheel bracket (11) a seat mechanism (4), a seat for the infant to be seated on the seat mechanism (4), and a lower wheel end of the wheel bracket (11) provided with a wheel assembly ( 7), the main cart frame (1) is detachably connected to the cart frame (2), so that the cart rack (2) and the main cart rack (1) a first working state with phase separation, and a second working state in which the cart frame (2) is connected to the main cart frame (1), in the cart rack (2) In the first working state with the main cart frame (1), the lower front end of the main front wheel bracket (10) is provided with a main front wheel assembly 6), the lower rear end of the main rear wheel bracket (9) is provided with a main rear wheel assembly (5), and the main cart frame (1) is provided with a push rod (8), the main cart The frame (1) constitutes a stand-alone single-person cart; the main front wheel bracket (10) is in a second working state with the cart frame (2) and the main cart frame (1) a lower end portion, at least one of the lower end portions of the main rear wheel bracket (9) is provided with a wheel assembly, and the main cart frame (1) or the attached cart frame (2) is disposed There is a push rod (8), the attached seat is located in front of the main seat or behind the main seat, the main cart frame (1) and the attached cart frame (2) ) constitutes an independent double stroller.  2. The stroller according to claim 1, characterized in that: when the cart frame (2) and the main cart frame (1) are in a second working state, the main front wheel bracket The lower end portion of (10) is provided with a main front wheel assembly (6), and the lower end portion of the main rear wheel bracket (9) is provided with a main rear wheel assembly (5).  3. The stroller according to claim 1, wherein: when said cart frame (2) and said main cart frame (1) are in a second working state, said attached seat is located at said In front of the main seat, the rear portion of the attached cart frame (2) is detachably coupled to the front portion of the main cart frame (1), and the main cart frame (1) is disposed There is a pusher stalk (8), the main rear wheel bracket The lower end of (9) is provided with a main rear wheel assembly (5). 4. The stroller according to claim 3, characterized in that: when the cart frame (2) and the main cart frame (1) are in a second working state, the cart rack (2) The front part is detachably connected with a serving tray (17) or a front armrest, when the cart rack (2) is The main cart frame (1) is in a first working state, and the accommodating tray (17) or the front armrest is detachably connected to the front portion of the main cart frame (1).  The stroller according to claim 3, characterized in that: the rear part of the cart frame (2) is connected with a main dinner plate (16) or a main front armrest, when the stroller frame is attached ( 2) In the second working state with the main cart frame (1), the main tray (16) or the main front armrest is located at the front upper side of the main seat.  6. The stroller according to claim 3, wherein: said cart frame (2) further comprises a side armrest (19) having a front end portion connected to an upper end portion of said cap wheel bracket (11). The seat mechanism (4) includes a seat link (13), and a front end portion of the attached link (13) is coupled to the wheel bracket (11), when Attaching the cart frame (2) to the main cart frame (1) in a second working state, the rear portion of the side armrest (19) is connected to the main cart frame (1), and Between the two, there is a first locking mechanism (27), and when the cart frame (2) and the main cart frame (1) are in a second working state, the attached connecting rod (13) The rear portion is connected to the main cart frame (1) with a second locking mechanism (28) therebetween.  7. The stroller according to claim 6, wherein: said main cart frame (1) further comprises a main side armrest (18) having a front end portion connected to an upper end portion of said main front wheel bracket (10). a push rod (8) connected to the rear end portion of the main side armrest (18), the upper end portion of the main rear wheel bracket (9) being opposite to the main side armrest (18) Connecting, the main seat mechanism (3) includes a main seat link (12) between the main front wheel bracket (10) and the main rear wheel bracket (9), when attached When the cart frame (2) is in the second working state with the main cart frame (1), the rear portion of the side armrest (19) is opposite to the front portion of the main side armrest (18). Connected, the rear portion of the attached link (13) is coupled to the front of the main seat link (12).  8. The stroller according to claim 7, wherein: when the cart frame (2) and the main cart frame (1) are in a second working state, the side armrest ( 19) detachably connected to the front plate (17) or the front armrest, when the cart frame (2) and the main cart frame (1) are in the first working state, The accommodating tray (17) or the front armrest is detachably coupled to the front portion of the main side armrest (18). 9. The stroller according to claim 1, wherein: when said cart frame (2) and said main cart frame (1) are in a second working state, said attached seat is located at said Rear of the main seat, the front portion of the cart frame (2) is detachably coupled to the rear portion of the main cart frame (1), and the cart frame (2) is attached Provided with a push rod (8), the main front wheel bracket The lower end of (10) is provided with a main front wheel assembly (6).  10. The stroller according to claim 9, wherein: said pusher bar (2) and said main cart frame (1) are in a second working state, said push bar ( 8) removably attached to the rear of the cart frame (2), when the cart frame (2) and the main cart rack (1) are in the first working state, The push rod (8) is detachably coupled to the rear portion of the main cart frame (1).  A stroller according to claim 9, characterized in that: the front portion of the main cart frame (1) is connected to a main serving tray (16) or a main front armrest.  12. A stroller according to claim 9, characterized in that: the rear portion of the main cart frame (1) is connected to a serving tray or a front armrest.  13. The stroller according to claim 9, wherein: said cart frame (2) further comprises a side armrest (19) having a front portion connected to an upper end portion of said wheel bracket (11). a push rod link (32) having an upper end portion connected to a rear end portion of the side armrest (19), and the attached seat mechanism (4) includes a mount link (13) The rear end portion of the attached connecting rod (13) is connected to the attached wheel bracket (11), when the attached cart frame (2) and the main cart frame (1) are in the second In the working state, the front portion of the side armrest (19) is connected to the rear portion of the main cart frame (1), and has a first locking mechanism (27) therebetween, when Attached to the cart frame (2) in the second working state with the main cart frame (1), the front part of the attached connecting rod (13) and the rear part of the main cart frame (1) They are connected and have a second locking mechanism (28) therebetween.  14. The stroller according to claim 13, wherein: said main cart frame (1) further comprises a main side armrest (18) having a front end portion connected to an upper end portion of said main front wheel bracket (10). a main push rod link (31) having an upper end portion connected to a rear end portion of the main side armrest (18), an upper end portion of the main rear wheel bracket (9) and the main side armrest (18) being connected, the main seat mechanism (3) includes a main seat link (12) between the main front wheel bracket (10) and the main rear wheel bracket (9), when The cart frame (2) and the main cart frame (1) are in a second working state, the front portion of the side armrest (19) and the main side armrest (18) The rear portion is connected, and the front portion of the attached link (13) is connected to the rear portion of the main seat link (12). The stroller according to claim 14, characterized in that: when the main cart frame (1) and the attached cart frame (2) are in a second working state, the push rod ( 8) detachably connected to the pusher lever link (32), when the main cart frame (1) and the attached cart frame (2) are in a first working state, The push rod (8) and the main push rod link (31) The phases are detachably connected.  16. The stroller according to claim 14, wherein: said main dinner plate (16) or main front armrest is connected to a front portion of said main side armrest (18), said main side armrest (18) The rear part is connected with a plate or front armrest.