CN213109477U - Baby carriage - Google Patents

Abstract

The utility model discloses a baby carriage, which comprises a frame capable of being converted between an expansion state and a folding state and a seat arranged on the frame, so that the seat can be converted between a forward setting and a backward setting relative to the frame, the seat comprises a backrest, a locking mechanism used for locking the frame in the expansion state and an unlocking mechanism used for unlocking the locking mechanism are arranged on the frame, when the seat is arranged backward relative to the frame, the backrest rotates downwards to drive the unlocking mechanism to unlock the locking mechanism; so set up, be equivalent to the action that will rotate the seat back and drive the two unifications of release mechanism unblock locking mechanical system action, thereby the utility model discloses the receipts of perambulator are closed and are operated wholly portably.

Description

Baby carriage

Technical Field

The utility model relates to an infant's product field especially relates to a perambulator.

Background

Strollers are widely used in families with infants. The stroller generally includes a frame that can be converted between an unfolded state and a folded state, and a seat disposed on the frame. The frame is provided with a locking mechanism for locking the frame in an unfolded state and an unlocking mechanism for unlocking the locking mechanism, and the frame can be folded after the unlocking mechanism is operated to unlock the locking mechanism. In order to reduce the overall volume of the folded baby carriage, the backrest should be rotated to be close to the frame, i.e. the seat is folded. In this folding operation, two operations of rotating the backrest and driving the unlocking mechanism to unlock the locking mechanism are required, so that the folding operation of the stroller is overall complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned shortcoming, provide a perambulator, it is rotatory but the seat back of perambulator is used for with but the unblock the frame is locked in the locking mechanical system of expansion state, thereby the utility model discloses the receipts of perambulator are closed and are operated wholly portably.

In order to achieve the above object, the utility model adopts the following technical scheme:

a baby carriage comprises a frame capable of being converted between an unfolding state and a folding state and a seat arranged on the frame, wherein the seat can be converted between a forward setting and a backward setting relative to the frame, the seat comprises a backrest, a locking mechanism used for locking the frame in the unfolding state and an unlocking mechanism used for unlocking the locking mechanism are arranged on the frame, and when the seat is arranged backward relative to the frame, the backrest rotates downwards to drive the unlocking mechanism to unlock the locking mechanism.

The frame comprises a driver, a rear leg, a sliding seat which can be relatively connected to the rear leg in a vertical sliding manner, a front leg, a first connecting piece and a second connecting piece, the lower end of the driver is pivoted on the sliding seat, the rear end of the front leg is pivoted on the front end of the rear leg, the front end of the first connecting piece is pivoted on the front leg, the rear end of the first connecting piece is pivoted on the sliding seat, the rear end of the second connecting piece is pivoted on the driver, the front end of the second connecting piece is pivoted on the rear end of the front leg or the rear leg,

or the front end of the second connecting piece is coaxially and rotatably pivoted with the rear end of the front foot and the front end of the rear foot, and the locking mechanism is arranged among the sliding seat, the rear foot and the first connecting piece or between the first connecting piece and the rear foot.

The rear end of the front foot or the front end of the rear foot or the front end of the second connecting piece is fixedly connected with a first fixed seat, and the seat is connected to the first fixed seat; the unlocking mechanism comprises a first fixed seat movably connected with the first fixed seat

The unlocking device and the linkage piece of which two ends are respectively connected with the unlocking device and the locking mechanism are arranged on the locking mechanism; when the seat is arranged backwards relative to the frame, the backrest is rotated downwards to drive the unlocking device, and then the linkage piece is driven to unlock the locking mechanism.

The locking mechanism comprises a locking piece which is connected with the first connecting piece in a relatively back-and-forth moving mode and a first spring arranged between the locking piece and the first connecting piece, the locking piece is connected with one end of the linkage piece, and under the action of the first spring, the rear side of the locking piece is inserted into the rear leg; preferably, the rear side of a fixing piece is fixedly connected in the first connecting piece, a containing groove which extends forwards and backwards and is provided with an opening at the rear end is arranged in the fixing piece, the rear side of the locking piece can be contained in the containing groove in a relatively front-back moving mode, the first spring is arranged between the front side wall of the containing groove and the rear side of the locking piece, and under the action of the first spring, the rear side of the locking piece moves backwards to extend out of the containing groove and then penetrates through the sliding seat to be inserted into the rear foot.

The unlocking device comprises an actuating part, an unlocking part and a second spring, wherein the actuating part can be connected to the first fixing part in a relatively front-back moving mode, the unlocking part is pivoted to the first fixing part, the second spring is arranged between the actuating part and the first fixing part and can drive the actuating part to move forwards, the unlocking part is connected with the other end of the linkage part, the actuating part can move relative to the first fixing part under the pushing of a downward rotating backrest, so that the unlocking part is driven to rotate relative to the first fixing part, and the rotating unlocking part drives the linkage part to unlock the locking mechanism. The actuating piece is provided with an actuating groove, the upper side of the unlocking piece is positioned in the actuating groove, and the lower side of the unlocking piece is connected with the linkage piece; the front side wall of the actuating groove of the actuating piece is provided with an inclined surface.

The first fixing seat is provided with an accommodating groove, a connecting seat is fixedly connected in the accommodating groove, an accommodating guide groove extending front and back is formed in the connecting seat, and the actuating piece can be connected in the accommodating guide groove in a relatively front-back moving mode.

The left side wall and the right side wall of the accommodating guide groove extend downwards to form a left connecting wall and a right connecting wall, and a front side wall extends downwards from the front side of the bottom wall of the accommodating guide groove; the connecting device is characterized in that two connecting plates are arranged in the accommodating groove at intervals, the left connecting wall and the right connecting wall of the connecting seat are respectively arranged between the two connecting plates and the two side walls of the accommodating groove, the front side wall of the connecting seat is arranged between the front side wall of the accommodating groove and the rear ends of the two connecting plates, and the unlocking piece is arranged between the two connecting plates.

The backrest is provided with a driving block at the rear side, when the seat is arranged backwards relative to the frame, the backrest rotates towards one side facing the front feet, and the driving block can drive the unlocking mechanism to unlock the locking mechanism.

The rear side of the backrest is provided with a groove, the driving block extends outwards from the bottom wall of the groove, the shape of the groove is matched with that of the front upper side of the first fixing seat, and when the frame is in a folding state, the groove is coated outside the front upper side of the first fixing piece.

The utility model has the advantages that:

1. when the seat is arranged backwards relative to the frame, the backrest of the seat is rotated downwards to unlock the locking mechanism used for locking the frame in the unfolded state, which is equivalent to two-in-one combination of the action of rotating the backrest of the seat and the action of driving the unlocking mechanism to unlock the locking mechanism, thereby the folding operation of the baby carriage is integrally simple and convenient;

2. because the utility model discloses an above-mentioned design to up when rotatory leaning on certain angle, release mechanism can automatic re-setting, thereby need not extra operation release mechanism expandes the in-process at the frame in other words, will release mechanism's the operation that resets and the operation that resets that leans on two unifications, thereby make the utility model discloses the expansion operation of perambulator is also more simple and convenient.

Drawings

Fig. 1 is a first schematic view of the stroller of the present invention in an unfolded state;

fig. 2 is a second schematic view of the stroller of the present invention in the unfolded state;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an exploded view from another angle according to portion A of FIG. 2;

fig. 5 is a schematic view of the stroller of the present invention with the frame and the seat separated;

FIG. 6 is an enlarged schematic view of the portion B of FIG. 2;

FIG. 7 is an enlarged view of the portion C of FIG. 5;

FIG. 8 is an exploded view according to section C of FIG. 5;

fig. 9 is an enlarged cross-sectional view of the stroller of the present invention in the unfolded state;

FIG. 10 is an enlarged schematic view of a portion D of FIG. 9;

FIG. 11 is an enlarged view of section E of FIG. 10;

FIG. 12 is an enlarged schematic view of section F of FIG. 10;

fig. 13 is an enlarged cross-sectional view of the stroller of the present invention during the folding process;

FIG. 14 is an enlarged view of the portion G of FIG. 13;

FIG. 15 is an enlarged view of a portion H in FIG. 14;

FIG. 16 is an enlarged view of section I of FIG. 14;

fig. 17 is an enlarged schematic view of the stroller of the present invention after being folded.

Detailed Description

As shown in fig. 1 to 16, the utility model discloses a baby carriage includes a frame 1 that can change between expansion state and receipts state and set up in seat 2 on the frame 1, so seat 2 can be relative frame 1 and change between setting forward and the backward setting, seat 2 includes the rotatory back 21 of frame 1 relatively, be provided with on the frame 1 be used for with frame 1 locks in the locking mechanical system under the expansion state and is used for the unblock locking mechanical system's release mechanism, works as when setting up after frame 1 is relative to seat 2, down rotate back 21 can drive release mechanism unblock locking mechanical system, thereby can realize the utility model discloses baby carriage's receipts are closed.

In this embodiment, the frame 1 includes a rider 11, a rear leg 12, a sliding seat 13, a front leg 14, a first connecting member 15, and a second connecting member 16, the sliding seat 13 is connected to the rear leg 12 in a relatively up-down sliding manner, a lower end of the rider 11 is pivoted to the sliding seat 13, a rear end of the front leg 14 is pivoted to a front end of the rear leg 12, a front end of the first connecting member 15 is pivoted to the front leg 14, a rear end of the first connecting member is pivoted to the sliding seat 13, a rear end of the second connecting member 16 is pivoted to the rider 11, a front end of the second connecting member 16 is pivoted to a rear end of the front leg 14 or the rear leg 12, or a front end of the second connecting member 16 rotates coaxially with a rear end of the front leg 14 and a front end of the rear leg 12, and the locking mechanism is disposed between the sliding seat 13, the rear leg 12 and the first connecting member 15 or between the. The frame 1 is arranged such that the backrest 21 rotates downward when the seat 2 is arranged in the rearward direction without interfering with the rider 11.

The rear end of the front leg 14 or the front end of the rear leg 12 or the front end of the second connecting piece 16 is fixedly connected with a first fixed seat 17, and the seat 2 is connected to the first fixed seat 17; the unlocking mechanism comprises an unlocking device movably connected to the first fixed seat 17 and a linkage part 41, wherein two ends of the linkage part are respectively connected with the unlocking device and the locking mechanism; when the seat 2 is disposed rearward relative to the frame 1, rotating the backrest 21 downward (i.e., rotating the backrest 21 toward the side of the front leg 14) actuates the unlocking device, which in turn actuates the linkage 41 to unlock the locking mechanism.

One end of the linkage piece 41 is connected with the unlocking device, and the other end of the linkage piece passes through the first fixed seat 17, the front leg 14 and the first connecting piece 15 to be connected with the locking mechanism. In the present embodiment, the linkage 41 is provided as a steel wire.

As shown in fig. 2, 3, 4 and 12, the locking mechanism includes a locking member 51 connected to the first connecting member 15 in a relatively movable manner, and a first spring 52 disposed between the locking member 51 and the first connecting member 15, the locking member 51 is connected to one end of the linking member 41, and under the action of the first spring 52, the rear side of the locking member 51 is inserted into the rear leg 12. The first connecting member 15 cannot move up and down relative to the rear leg 12, and the sliding base 13 cannot slide up and down relative to the rear leg 12, and at this time, the frame 1 is locked in the unfolded state and cannot be folded.

Preferably, the front side of the locking element 51 is connected to the first connecting element 15 in a relatively back and forth manner, and the front side of the locking element 51 is inserted into the rear leg 12 after passing through the sliding seat 13 under the action of the first spring 52. The arrangement makes the relative locking state of the sliding seat 13, the rear leg 12 and the first connecting piece 15 more stable, so that the frame 1 is more stable in the unfolding state and safer to use.

In this embodiment, the sliding base 13 includes a body 131 sleeved on the rear leg 12, two pivoting plates 132 respectively extending forward from the front side of the body 131, the rear end of the first connecting member 15 is pivotally connected between the two pivoting plates 132, the body 131 is provided with a first through hole (not shown), the tube wall of the rear leg 12 is provided with a second through hole 121 at a position corresponding to the first through hole, and under the action of the first spring 52, the rear side of the locking member 51 sequentially passes through the first through hole and the second through hole 121 and then is inserted into the rear leg 12.

Preferably, a fixing member 53 is fixedly connected to the first connecting member 15 at a rear side thereof, and an accommodating groove 531 extending forward and backward and having an open rear end is formed in the fixing member 53, the locking member 51 is accommodated in the accommodating groove 531 at a rear side thereof capable of moving forward and backward, and the first spring 52 is disposed between a front side wall of the accommodating groove 531 and a rear side of the locking member 51. Under the action of the first spring 52, the rear side of the locking member 51 moves backward to protrude out of the receiving groove 531, i.e., out of the rear end of the fixing member 53, and then passes through the first and second through holes 121 to be inserted into the rear leg 12. This arrangement makes the connection between the locking member 51 and the first connecting member 15 stronger and more stable, and thus the frame 1 is more stable in the unfolded state.

Referring to fig. 5 and 7 to 11, the unlocking device includes an actuating member 42 connected to the first fixing seat 17 in a relatively movable manner, an unlocking member 43 pivotally connected to the first fixing seat 17, and a second spring 44 disposed between the actuating member 42 and the first fixing seat 17, the unlocking member 43 is connected to the other end of the linking member 41, the actuating member 42 is pushed by the backrest 21 rotating downward to move relative to the first fixing seat 17, so as to drive the unlocking member 43 to rotate relative to the first fixing seat 17, and the rotating unlocking member 43 drives the linking member 41 to unlock the locking mechanism.

Preferably, the actuating member 42 is provided with an actuating groove 421 (as shown in fig. 15), the upper side of the unlocking member 43 is located in the actuating groove 421, and the lower side of the unlocking member 43 is connected to the linking member 41. The actuating member 42 moves backward under the pushing of the rotating backrest 21, and the front side wall of the actuating groove 421 can push the upper side of the unlocking member 43 to rotate downward, so that the lower side of the unlocking member 43 rotates upward to drive the linkage member 41 to unlock the locking mechanism.

Preferably, the front sidewall of the actuating groove 421 of the actuating member 42 is provided with an inclined surface 422, so that the inclined surface pushes the upper side of the unlocking member 43 during the backward movement of the actuating member 42, thereby not only pushing more smoothly, but also causing less damage to the contact surface between the inclined surface 422 and the locking member 51.

In this embodiment, the first fixing seat 17 is provided with a receiving groove 171, a connecting seat 18 is fixedly connected in the receiving groove 171, the connecting seat 18 is provided with a receiving guide groove 181 extending forward and backward, and the actuating member 42 is connected in the receiving guide groove 181 in a manner of moving forward and backward relatively.

Preferably, the top wall of the accommodating guide groove 181 is provided with a notch from front to back, the actuating member 42 includes a connecting portion 422 and a limiting portion 423 extending upward from the front end of the connecting portion 422, and the connecting portion 422 can be connected in the accommodating guide groove 181 in a relative back-and-forth movement manner. When the actuating member 42 moves back to a certain distance, the limiting portion 423 abuts against the wall portion 182 of the notch, so that the actuating member 42 cannot move any more, and the locking mechanism is unlocked.

The second spring 44 is disposed at a position corresponding to the rear end of the actuating member 42 and the first fixing seat 17. In other embodiments, the rear side of the accommodating guide groove 181 may be closed, so that the second spring 44 is disposed between the rear end of the actuating member 42 and the rear side wall of the accommodating guide groove 181.

The left and right side walls of the accommodating guide groove 181 extend downwards to form a left and right connecting wall 183, and a front side wall 184 extends downwards from the front side of the bottom wall of the accommodating guide groove 181; two connecting plates 172 (only one connecting plate 172 is shown in fig. 8) are spaced in the accommodating groove 171, the left and right connecting walls 183 of the connecting seat 18 are respectively disposed between the two connecting plates 172 and the two side walls 173 of the accommodating groove 171, and the front side wall 184 of the connecting seat 18 is disposed between the front side wall 174 of the accommodating groove 171 and the rear ends of the two connecting plates 172. So set up for connecting seat 18 is more convenient with first fixing base 17 location, and consequently the equipment is also more convenient.

The unlocking member 43 is disposed between the two connecting plates 172, and the unlocking member 43 is pivotally connected to the two connecting walls 183 of the accommodating guide groove 181.

The rear side of the connecting seat 18 is further provided with a fixing portion 185 for fixedly connecting with the first fixing seat 17.

The actuating member 42 is provided with a long hole 424 extending forward and backward, the left and right side walls 173 of the receiving groove 171 and the two connecting walls 183 of the receiving guide groove 181 are respectively provided with a first connecting hole 175 and a second connecting hole 186 corresponding thereto, and a rivet passes through the first fixing seat 17, the first connecting hole 175 and the second connecting hole 186 of the connecting seat 18 and the long hole 424, thereby connecting the first fixing seat 17, the connecting seat 18 and the actuating member 42.

The seat 2 further comprises a sitting portion 22 connected to the frame 1, the lower end of the backrest 21 is connected to the sitting portion 22 in a relatively rotatable manner, a backrest locking mechanism used for limiting the relative rotation of the backrest 21 and the sitting portion 22 is arranged between the backrest 21 and the sitting portion 22, and the backrest 21 can be rotated by unlocking the backrest locking mechanism. The backrest locking mechanism and the manner of unlocking the backrest locking mechanism can be any known and feasible structures, and are not the invention points of the present invention, and therefore, the description is omitted.

In this embodiment, the lower end of the seat part 22 is connected to the first fixing seat 17, and in other embodiments, the seat part 22 may also be a part of the frame 1, that is, the seat part 22 and the first fixing seat 17 are integrally formed.

The structure of the seat 2 that can be switched between the forward arrangement and the backward arrangement with respect to the frame 1 may be any known feasible structure, and is not the invention point of the present invention, and therefore, the description is not repeated here.

The back 21 is provided with a driving block 211 at the rear side, when the seat 2 is arranged backwards relative to the frame 1, the back 21 rotates downwards, and the driving block 211 can push the unlocking device to drive the linkage piece 41 to unlock the locking mechanism. Specifically, the driving block 211 pushes the actuator 42 of the unlocking device to move.

Preferably, a groove 212 (as shown in fig. 2 and 6) is disposed at the rear side of the backrest 21, the driving block 211 extends outward from the bottom wall of the groove 212, the shape of the groove 212 matches with the front upper side of the first fixing seat 17, and when the frame 1 is in the folded state, the groove 212 is wrapped around the front upper side of the first fixing seat 17. Thus, the backrest 21 and the front leg 14 can be closer to each other, so that the folded stroller is smaller in size.

As shown in fig. 13 to 16, when the stroller of the present invention is to be folded, the seat 2 is first set backward relative to the frame 1, then the backrest locking mechanism is unlocked, and then the backrest 21 is rotated downward, i.e. toward the front leg 14; when the backrest 21 rotates to a certain angle, the driving block 211 at the rear side of the backrest 21 contacts with the actuating part 42, and when the backrest 21 continues to rotate, the driving block 211 can push the actuating part 42 to move backwards, so that the inclined plane 422 of the actuating part 42 pushes the upper side of the unlocking part 43 to rotate backwards and downwards, therefore, according to the seesaw principle, the lower side of the unlocking part 43 rotates forwards and upwards, the steel wire 41 is pulled, the locking part 51 is driven to move forwards, when the locking part 51 is completely separated from the rear leg 12, the locking mechanism is unlocked, and the sliding seat 13 and the rear end of the first connecting part 15 can move downwards relative to the rear leg 12.

In this embodiment, the locking mechanism may be configured such that when the backrest 21 is rotated to be parallel to the front leg 14 or abutted against the front leg 14, the locking member 51 is completely disengaged from the rear leg 12, i.e., the locking mechanism is unlocked. In other embodiments, the locking mechanism may be unlocked when the backrest 21 is not yet parallel to or abutting against the front leg 14, and the backrest 21 may be further rotated after the locking mechanism is unlocked until the backrest 21 abuts against the front leg 14 and is not rotated any more; or to release the backrest 21 after unlocking the locking mechanism, the backrest 21 will automatically continue to rotate downwards until it no longer rotates against the front foot 14 due to gravity. Preferably, the backrest 21 may be at different normal inclination angles with respect to the seat 22, when the backrest 21 is at the maximum normal inclination angle with respect to the seat 22, the backrest 21 is substantially parallel to the seat 22, and when the backrest 21 rotates at the maximum normal inclination angle with respect to the seat 22, the driving block 211 behind the backrest 21 cannot push the actuating member 42, i.e. cannot unlock the locking mechanism; when the backrest 21 rotates beyond the maximum normal angle, the driving block 211 can push the actuator 42 to move. By such arrangement, the folding of the frame can not be influenced when the normal inclination angle of the seat back 21 is adjusted. The adjusting structure of the inclination angle of the backrest 21 can be any known and feasible structure, and therefore, will not be described herein.

After the locking mechanism is unlocked, the rider 11 is rotated forwards, and simultaneously the lower end of the rider 11 moves downwards relative to the rear leg 12, so that the sliding seat 13 is driven to move downwards along the rear leg 12, the rear end of the first connecting piece 15 moves together with the sliding seat 13, and the front end of the first connecting piece 15 pulls the front leg 14 to rotate backwards to be close to the rear leg 12; meanwhile, along with the rotation and the movement of the driver 11, the rear end of the second connecting piece 16 is driven by the driver 11 to rotate backwards and downwards; until the front legs 14, the rear legs 12, the first connecting pieces 15, the second connecting pieces 16 and the rider 11 approach each other, the seat back 21 abutting against the front legs 14 also approaches other components of the frame 1 (shown in fig. 17) along with the rotation of the front legs 14, and the frame 1 is in a folded state. In the folding process and after the folding of the frame, if no manual operation is performed, the seat back 21 will not rotate upward, so that the driving block 211 keeps pressing the actuating component 42, and the unlocking device cannot be reset.

The utility model discloses the perambulator so sets up, is equivalent to the action that leans on the seat back of rotating seat and drives the mechanism action two unifications of release mechanism unblock locking machine, thereby the utility model discloses the receipts of perambulator are closed and are operated wholly portably.

In this embodiment, the first fixing seat 17 is fixedly connected to the rear end of the front leg 14, so that when the stroller of the present invention is folded, the seat 2 can move along with the front leg 14 rotating backward, thereby not affecting the mutual approaching of the rider 11 and the rear leg 12 to reduce the overall volume of the folded rear frame.

Preferably, the front end of the rear leg 12 is fixedly connected with a second fixing seat 120, and the front end of the second connecting member 16 is coaxially and rotatably pivoted with the first fixing seat 17 and the second fixing seat 120.

The frame 1 further comprises a pushing handle 19 with a lower end pivoted to the upper end of the handle 11, so that when the frame 1 is in the unfolding state, the handle 11 and the pushing handle 19 are longer in overall length and are convenient for a caregiver to push the baby carriage. When the stroller of the present invention is folded, the handle 19 can be rotated backward and downward to make the handle 19 close to the handle 11.

When the folded baby carriage is to be unfolded, the backrest 21 is rotated upwards, and when the backrest 21 is rotated to a certain angle, the actuating piece 42 is not pressed by the driving block 211 at the rear side of the backrest 21 any more, and under the action of the second spring 44, the actuating piece 42 can move forwards; when the frame 1 is unfolded again, the components of the frame 1 rotate reversely, when the sliding sleeve 13 is not moved to the position of the unfolded state of the frame 1, the rear end of the locking piece 51 is always pressed against the outer wall of the rear leg 12 and can not move back and forth, when the rear end of the locking piece 51 is aligned with the second through hole 121 again, the locking piece 51 is inserted into the rear leg 12 again under the action of the first spring 52, the frame 1 is also in the unfolded state at this time, and the frame 1 is locked in the unfolded state again. That is to say, when upwards rotatory backrest 21 was to certain angle, release mechanism can automatic re-setting to need not extra operation release mechanism, be equivalent to in frame expansion process, will release mechanism's the operation that resets and the operation that resets two unifications of backrest, thus make the utility model discloses the expansion operation of perambulator is also more simple and convenient.

The rear lower part of the rear leg 12 is connected with a rear wheel 122, and the front lower part of the front leg 14 is connected with a front wheel 140.

The seat 2 is arranged backwards relative to the frame 1, namely when parents push the baby carriage to move forwards, a child sits in the seat 2 and faces the parents; the seat 2 is disposed forwardly of the frame 1 and is reversed.

In the above description of the orientation, the front wheels 140 and the rear wheels 122 are located at the lower position, the push handle 19 is located at the upper position, the front wheels 140 are located at the front position, and the rear wheels 122 are located at the rear position, however, the rear side of the backrest 21 refers to the back of the backrest 21, i.e. the side of the backrest 21 facing away from the child when the child sits in the seat 2.

Claims (16)

1. A stroller comprising a frame convertible between an expanded configuration and a collapsed configuration and a seat disposed on the frame such that the seat is convertible between a forward configuration and a rearward configuration relative to the frame, the seat comprising a backrest, the stroller comprising: the seat is characterized in that a locking mechanism used for locking the frame in an unfolded state and an unlocking mechanism used for unlocking the locking mechanism are arranged on the frame, and when the seat is arranged backwards relative to the frame, the backrest rotates downwards to drive the unlocking mechanism to unlock the locking mechanism.

2. The stroller of claim 1, wherein: the frame comprises a driver, a rear foot, a sliding seat, a front foot, a first connecting piece and a second connecting piece, wherein the sliding seat can be connected to the rear foot in a relatively up-down sliding mode, the lower end of the driver is pivoted to the sliding seat, the rear end of the front foot is pivoted to the front end of the rear foot, the front end of the first connecting piece is pivoted to the front foot, the rear end of the first connecting piece is pivoted to the sliding seat, the rear end of the second connecting piece is pivoted to the driver, the front end of the second connecting piece is pivoted to the rear end of the front foot or the rear foot, or the front end of the second connecting piece is coaxially and rotatably pivoted with the rear end of the front foot and the front end of the rear foot, and the locking mechanism is arranged between the sliding seat, the rear foot and the first.

3. The stroller of claim 2, wherein: the rear end of the front foot or the front end of the rear foot or the front end of the second connecting piece is fixedly connected with a first fixed seat, and the seat is connected to the first fixed seat; the unlocking mechanism comprises an unlocking device movably connected to the first fixed seat and a linkage piece, and the two ends of the linkage piece are respectively connected with the unlocking device and the locking mechanism; when the seat is arranged backwards relative to the frame, the backrest is rotated downwards to drive the unlocking device, and then the linkage piece is driven to unlock the locking mechanism.

4. The stroller of claim 3, wherein: the locking mechanism comprises a locking piece and a first spring, wherein the locking piece is connected with the first connecting piece in a relatively back-and-forth moving mode, the first spring is arranged between the locking piece and the first connecting piece, the locking piece is connected with one end of the linkage piece, and under the action of the first spring, the rear side of the locking piece is inserted into the rear leg.

5. The stroller of claim 4, wherein: the rear side of the locking piece is fixedly connected into the first connecting piece, a containing groove which extends forwards and backwards and is provided with an opening at the rear end is arranged in the fixing piece, the rear side of the locking piece can be contained in the containing groove in a relatively front-back moving mode, the first spring is arranged between the front side wall of the containing groove and the rear side end of the locking piece, and under the action of the first spring, the rear side of the locking piece moves backwards to extend out of the containing groove and then penetrates through the sliding seat to be inserted into the rear leg.

6. The stroller of claim 3, 4 or 5, wherein: the unlocking device comprises an actuating part, an unlocking part and a second spring, wherein the actuating part can be connected to the first fixing seat in a relatively front-back moving mode, the unlocking part is pivoted to the first fixing seat, the second spring is arranged between the actuating part and the first fixing seat, the unlocking part is connected with the other end of the linkage part, the actuating part can move relative to the first fixing seat under the pushing of a downward rotating backrest, so that the unlocking part is driven to rotate relative to the first fixing seat, and the rotating unlocking part drives the linkage part to unlock the locking mechanism.

7. The stroller of claim 6, wherein: the actuating piece is provided with an actuating groove, the upper side of the unlocking piece is positioned in the actuating groove, and the lower side of the unlocking piece is connected with the linkage piece; the front side wall of the actuating groove of the actuating piece is provided with an inclined surface.

8. The stroller of claim 6, wherein: the first fixing seat is provided with an accommodating groove, a connecting seat is fixedly connected in the accommodating groove, an accommodating guide groove extending front and back is formed in the connecting seat, and the actuating piece can be connected in the accommodating guide groove in a relatively front-back moving mode.

9. The stroller of claim 7, wherein: the first fixing seat is provided with an accommodating groove, a connecting seat is fixedly connected in the accommodating groove, an accommodating guide groove extending front and back is formed in the connecting seat, and the actuating piece can be connected in the accommodating guide groove in a relatively front-back moving mode.

10. The stroller of claim 8 or 9, wherein: the left side wall and the right side wall of the accommodating guide groove extend downwards to form a left connecting wall and a right connecting wall, and a front side wall extends downwards from the front side of the bottom wall of the accommodating guide groove; the connecting device is characterized in that two connecting plates are arranged in the accommodating groove at intervals, the left connecting wall and the right connecting wall of the connecting seat are respectively arranged between the two connecting plates and the two side walls of the accommodating groove, the front side wall of the connecting seat is arranged between the front side wall of the accommodating groove and the rear ends of the two connecting plates, and the unlocking piece is arranged between the two connecting plates.

11. The stroller of claim 1 or 2, wherein: the backrest is provided with a driving block at the rear side, when the seat is arranged backwards relative to the frame, the backrest rotates towards one side facing the front feet, and the driving block can drive the unlocking mechanism to unlock the locking mechanism.

12. The stroller according to any one of claims 3 to 5 and 7 to 9, wherein: the backrest is provided with a driving block at the rear side, when the seat is arranged backwards relative to the frame, the backrest rotates towards one side facing the front feet, and the driving block can drive the unlocking mechanism to unlock the locking mechanism.

13. The stroller of claim 12, wherein: the rear side of the backrest is provided with a groove, the driving block extends outwards from the bottom wall of the groove, the shape of the groove is matched with that of the front upper side of the first fixing seat, and when the frame is in a folding state, the groove is coated outside the front upper side of the first fixing piece.

14. The stroller of claim 6, wherein: the backrest is provided with a driving block at the rear side, when the seat is arranged backwards relative to the frame, the backrest rotates towards one side facing the front feet, and the driving block can drive the unlocking mechanism to unlock the locking mechanism.

15. The stroller of claim 10, wherein: the backrest is provided with a driving block at the rear side, when the seat is arranged backwards relative to the frame, the backrest rotates towards one side facing the front feet, and the driving block can drive the unlocking mechanism to unlock the locking mechanism.

16. The stroller of claim 14 or 15, wherein: the rear side of the backrest is provided with a groove, the driving block extends outwards from the bottom wall of the groove, the shape of the groove is matched with that of the front upper side of the first fixing seat, and when the frame is in a folding state, the groove is coated outside the front upper side of the first fixing piece.

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