CN210310520U - Frame of baby carriage and baby carriage - Google Patents

Abstract

The utility model discloses a frame and perambulator of perambulator, the frame of perambulator have fold condition and expansion state, the frame includes: a frame body; the seat plate is arranged on the frame body; the locking mechanism comprises a base which is hinged with the frame body and is fixed relative to the seat plate; the backrest rod is hinged on the base; the lock mechanism is configured to lock rotation of the back lever with respect to the base in the deployed state, and to release the lock of the rotation of the back lever so that the back lever is rotatable with respect to the base before the frame is switched from the deployed state to the folded state. The frame of the baby carriage, the backrest rod and the seat plate can be unfolded and folded conveniently and reliably.

Description

Frame of baby carriage and baby carriage

Technical Field

The utility model relates to a perambulator technical field, in particular to frame and perambulator of folding perambulator.

Background

Baby strollers have become an indispensable product in the growth process of infants. The existing baby carriage on the market can be folded to be convenient to carry, but the existing traditional baby carriage is complex in structure and still large in size after being folded.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a frame of perambulator, can expand and fold convenient and reliable between back pole and the seat board. The utility model also provides a baby carriage of using this frame.

The utility model discloses a first aspect discloses a frame of perambulator, has fold condition and expansion state, the frame includes:

a frame body;

the seat plate is arranged on the frame body;

the locking mechanism comprises a base which is hinged with the frame body and is fixed relative to the seat plate;

the backrest rod is hinged on the base;

the lock mechanism is configured to lock rotation of the back lever with respect to the base in the deployed state, and to release the lock of the rotation of the back lever so that the back lever is rotatable with respect to the base before the frame is switched from the deployed state to the folded state.

In some embodiments, a torsion spring is further disposed between the backrest rod and the base, and the torsion spring is configured to provide an elastic force to the backrest rod, so that the backrest rod tends to rotate in the folding direction relative to the base.

In some embodiments, the locking mechanism comprises:

at least one locking position arranged on the base;

the locking piece is connected with the end part of the backrest rod in a sliding mode and is used for being matched with the locking position to lock the backrest rod;

and the first elastic device is arranged between the backrest rod and the locking piece and used for providing elastic force which enables the locking piece to tend to be locked when the backrest rod is locked.

In some embodiments, the locking mechanism further comprises an unlocking block movable relative to the base for movement when subjected to an externally applied force to urge the locking member against the resilient force provided by the first resilient means and out of the locking position.

In some embodiments, a traction belt connected to the unlocking block is further disposed on the seat plate, and is configured to drive the unlocking block to move when receiving an externally applied pulling force, so as to unlock the backrest rod by the locking mechanism.

In some embodiments, the frame further includes a moving slider slidably connected to the seat plate, the traction belt is connected to the moving slider, the moving slider is connected to the unlocking block through a first rope, and the traction belt drives the moving slider to slide when being pulled, so as to drive the rope to pull the unlocking block to move.

In some embodiments, the moving slider comprises a connecting shaft, the seat plate is provided with a traction belt hole, one end of the traction belt passes around the connecting shaft and penetrates through the traction belt hole, and the size of the end is larger than that of the traction belt hole.

In some embodiments, the frame body includes a hand push rod, a front foot rod and a rear foot rod, the hand push rod is connected to the front foot rod and/or the rear foot rod through a rotational joint, a locking device for locking a rotational position of the hand push rod is disposed on the rotational joint, the locking device is connected to the movable slider through a second rope, and the locking device is configured to release locking of the rotational position of the hand push rod by the locking device through the second rope when the traction belt drives the movable slider to slide.

In some embodiments, the seat plate is further provided with a guide pulley, and the first rope is wound around the guide pulley.

In some embodiments, an elastic return device is further provided between the moving slider and the seat plate and/or between the unlocking block and the base.

In some embodiments, the locking mechanism includes two or more locking positions corresponding to different backrest angles of the backrest lever, and the backrest lever is further provided with an adjusting member connected to the locking member through a third rope, and when the backrest lever is locked, the adjusting member is configured to pull the locking member out of the locking positions through the third rope when triggered by an external force.

In some embodiments of the present invention, the,

the frame body still includes:

the rear foot rod is used for mounting rear wheels of the baby carriage, and the base is hinged to the rear foot rod;

the front foot rod is hinged with the rear foot rod and is used for mounting the front wheels of the baby carriage;

the seat pan includes:

the first plate body is fixed relative to the base;

one end of the second plate body is hinged with the front foot rod, and the other end of the second plate body is hinged with the first plate body;

and the limiting structure is used for limiting the relative rotating angle of the first plate body and the second plate body.

In some embodiments, a first protrusion is disposed on an end portion of the first plate body close to the second plate body, a first groove matched with the first protrusion is disposed on an end portion of the second plate body close to the first plate body, and/or a second groove is disposed on an end portion of the first plate body close to the second plate body, and a second protrusion matched with the second groove is disposed on an end portion of the second plate body close to the first plate body; the first protrusion is matched with the first groove and/or the second protrusion is matched with the second groove to block the first plate body and the second plate body from continuously and relatively rotating along the direction.

The utility model discloses a baby carriage is disclosed in the second aspect, include the frame.

Based on the utility model provides a frame of perambulator, through setting up locking mechanism, can lock and carry out the unblock to the back pole when switching to fold condition the position of back pole when expansion state convenient and reliable. Meanwhile, the backrest rod is hinged to the base, so that the base is hinged to the frame body, and the seat plate and the base are relatively fixed. The backrest rod can be folded relative to the seat plate and the seat plate can be folded relative to the frame body, so that the backrest rod can be folded more flexibly and conveniently, and the size of the folded frame of the baby carriage is further reduced.

Based on the utility model provides a perambulator also has corresponding beneficial effect.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural view of a stroller according to an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the stroller shown in FIG. 1;

FIG. 3 is an enlarged partial schematic view of a portion A of the stroller shown in FIG. 2;

FIG. 4 is a schematic view of a further angle of the stroller shown in FIG. 1;

FIG. 5 is a schematic structural view of the stroller frame of FIG. 1 in a folded configuration;

FIG. 6 is a schematic view of a further angle of the stroller shown in FIG. 5;

FIG. 7 is a schematic view of a further angle of the stroller shown in FIG. 5;

FIG. 8 is a schematic structural view of a portion of the stroller shown in FIG. 1;

FIG. 9 is an exploded view of a portion of the stroller shown in FIG. 1;

fig. 10 is a structural view of a portion of the structure of the stroller shown in fig. 1 when the back lever is locked;

FIG. 11 is a cross-sectional structural view of a portion of the stroller shown in FIG. 10;

fig. 12 is a schematic structural view of a part of the structure of the stroller shown in fig. 1 when the lock of the back lever is released;

fig. 13 is a cross-sectional view schematically showing a part of the structure of the back lever of the stroller shown in fig. 12 when the locking is released;

FIG. 14 is a cross-sectional view of a portion of the stroller shown in FIG. 12 with the back bar fully unlocked;

FIG. 15 is an assembled structural view of a portion of the stroller shown in FIG. 1;

fig. 16 is a bottom structure view of the seat plate of the stroller shown in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 16, the frame of the stroller of the present invention has a folded state and an unfolded state, and includes a frame body 1, a seat plate 2, a locking mechanism, and a backrest rod 4. The seat plate 2 is arranged on the frame body 1; the locking mechanism comprises a base 31 which is hinged with the frame body 1 and is fixed relative to the seat plate 2; the backrest rod 4 is hinged on the base 31; the lock mechanism is configured to lock rotation of the back lever 4 with respect to the base 31 in the deployed state, and to release the lock of the rotation of the back lever 4 to rotate the back lever 4 with respect to the base 31 before the frame is switched from the deployed state to the folded state.

As shown in fig. 1 to 4, when the frame of the stroller is in the unfolded state, the volume of the space occupied by the frame is increased, and the portions of the frame are unfolded and connected to be in a state where the baby can sit, that is, an operating state. As shown in fig. 5 to 7, the frame of the stroller is in a folded state, when the frame is in the folded state, the volume of the space occupied by the frame is reduced, and the frame is folded to be close to each other so that the volume of the space occupied by the frame is reduced, thereby facilitating the storage, transportation and the like of the frame.

The seat plate 2 is used for an infant to sit on, and may be in a shape close to a flat plate as shown in the drawings when the frame is in the unfolded state, in some embodiments not shown in the drawings, the seat plate 2 may also be in a plurality of shapes such as a concave shape, a convex shape and the like when the frame is in the unfolded state, and the seat plate 2 may be in a plate structure, a frame structure and the like, that is, the shape and shape of the seat plate 2 are not limited by the name of the seat plate, and the seat plate 2 only needs to be in a shape that allows an infant to sit on.

The frame body 1 includes a front foot bar 11 and a rear foot bar 12. The base 31 is fixed relative to the seat plate 2, the base 31 may be fixedly connected to the seat plate 2, or the base 31 and the seat plate 2 may be integrally formed. The base 31 is hinged to the frame body 1, and the seat plate 2 is fixed to the base 31, so that the seat plate 2 is hinged to the frame body 1 through the base 31. The base 31 may be hinged to the front foot bar 11, the rear foot bar 12 or other parts of the frame body 1. In fig. 1 to 16, the base 31 is hinged to the rear foot bar 12.

In the unfolded state, the backrest lever 4 is pivoted relative to the base 31 by means of a hinge to an angle for the backrest, in which case the locking mechanism locks the backrest lever, and in the locked state the position of the backrest lever 4 relative to the base 31 is fixed, in which case the user can carry out the backrest. Before the frame is switched from the unfolded state to the folded state, the locking mechanism can unlock the backrest rod 4, the backrest rod 4 can rotate relative to the base 31 through the hinge joint between the backrest rod and the base, so that when the frame is switched to the folded state, the backrest rod 4 can rotate and fold relative to the base 31, and as shown in fig. 1 to 4, the backrest rod 4 can automatically fold downwards under the action of self gravity after unlocking.

The frame of the stroller of the present embodiment can conveniently and reliably lock the position of the back rest lever 4 in the unfolded state and unlock the back rest lever 4 when the stroller is switched to the folded state by providing the locking mechanism. Meanwhile, the base 31 is hinged on the frame body 1 by providing the backrest lever 4 hinged on the base 31, and the seat plate 2 is fixed relative to the base 31. The backrest rod 4 can be folded relative to the seat plate 2 and the seat plate 2 can be folded relative to the frame body 1, so that the backrest rod 4 can be folded more flexibly and conveniently, the occupied space volume of the frame of the folded baby carriage can be further reduced, and the baby carriage using the frame can also have corresponding beneficial effects.

In some embodiments, as shown in the figures, a torsion spring 42 is further disposed between the backrest lever 4 and the base 31, and the torsion spring 42 is used for providing an elastic force to the backrest lever 4 so that the backrest lever 4 tends to rotate in the folding direction relative to the base 31. In this embodiment, the torsion spring 42 is provided to provide an elastic force tending to fold the backrest rod 4 downward, so that when the frame is switched to the folded state, the backrest rod 4 can be automatically folded downward under the action of the torsion spring 42 after the locking mechanism is released from locking the backrest rod 4, and when the frame is in the folded state, the elastic force provided by the torsion spring 42 enables the folding between the backrest rod 4 and the base 31, that is, between the backrest rod 4 and the seat plate 2 to be kept reliable and stable, thereby facilitating the transportation and storage of the frame. As shown in the figure, the base 31 is further provided with a spring cover 421 for covering the torsion spring 42.

In some embodiments, as shown in fig. 9, 11, 13, 14, the locking mechanism includes at least one locking position, a locking member 36, and a first resilient device 361. At least one locking station is provided on the base 31; the locking piece 36 is connected with the end part of the backrest rod 4 in a sliding way and is used for being matched with the locking position to lock the backrest rod 4; first elastic means 361 is provided between the back lever 4 and the lock member 36 for providing an elastic force that tends to lock the lock member 36 when the back lever 4 is locked. The locking member 36 can be locked in the locking position by sliding relative to the back lever 4, for example, the locking member can be locked by matching a clamping groove and a clamping pin, matching a clamping hole and a clamping shaft, and the like, so as to lock the back lever 4 which is connected with the locking member 36 in a sliding manner and hinged with the base 31. The elastic force provided by the first elastic device 361 can make the locking member 36 tend to move further toward the locking position, so that the locking member 36 tends to lock, and the locking mechanism can lock the backrest lever 4 more stably and reliably. The arrangement of the embodiment helps to simply and conveniently realize the locking of the locking mechanism on the backrest rod 4, and also helps to make the locking more stable and reliable.

The lock member 36 is shown as a lock rod, and the lock rod is located inside the back lever 4, and the lock rod slides relative to the back lever 4 so as to extend and retract from the back lever 4. The locking position is a slot in the base 31 and is formed by two blocks 311 disposed in the base 31. A sliding groove hole is formed in the locking rod, a hinge shaft of the backrest rod 4 hinged to the base 31 penetrates through the sliding groove hole, and the hinge of the backrest rod 4 and the base 31 does not influence the sliding of the locking rod. The first elastic means 361 is a spring provided between the lock lever and the wall of the chamber inside the back lever 4, the spring being in a compressed state, the spring providing the lock lever with an elastic force tending to extend outward. When locked, as shown in fig. 11, the lock lever protrudes from the back lever 4 and is locked against the click groove of the base 31.

In some embodiments, as shown in fig. 9-14, the locking mechanism further comprises an unlocking block 32 movable relative to the base 31 for movement upon application of an externally applied force to urge the locking member 36 against the resilient force provided by the first resilient means 361 and out of the locked position. The unlocking block 32 is movably provided on the base 31, and when receiving an externally applied force, it can rotate or move to provide a pushing force to the locking member 36, so as to push the locking member 36 away from the locking position against the elastic force provided by the first elastic device 361, thereby unlocking the back lever 4. In the illustration, the unlocking block 32 and the base 31 are slidable relative to each other, and when the unlocking lever is locked, a part of the end of the locking lever is caught in the slot of the base 31, and another part of the end of the locking lever is opposed to the unlocking block 32, so that when the unlocking block 32 slides upward by an external force, the end of the locking lever is pushed to move upward, and is separated from the slot, and the locking is released, as shown in fig. 13 and 14. In some embodiments, not shown, the unlocking piece 32 may also be rotated by an external force, for example, the unlocking piece 32 may be a cam structure, and the unlocking piece 32 may also push the locking member 36 when rotated.

In some embodiments, as shown in the figures, the seat plate 2 is further provided with a traction belt 23 connected with the unlocking block 32, and the traction belt is used for driving the unlocking block 32 to move when being subjected to external applied pulling force so as to unlock the backrest rod 4 by the locking mechanism. With this arrangement, the user can pull the pulling belt 23 to slide or rotate the unlocking piece 32, thereby unlocking the back lever 4.

In some embodiments, as shown in the drawings, the frame further includes a moving slider 33 slidably connected to the seat plate 2, the traction belt 23 is connected to the moving slider 33, the moving slider 33 is connected to the unlocking block 32 through a first rope 34, and the traction belt 23 drives the moving slider 33 to slide when being pulled, so as to drive the rope to pull the unlocking block 32 to move. Through setting up the movable sliding block 33, can exert the external force to unblock piece 32 indirectly, come the transmission pulling force through first rope 34 to can conveniently remove the setting of slider 33, be favorable to exerting the pulling force more conveniently and high-efficiently and better utilize the space of seat board 2.

In some embodiments, as shown in fig. 9, 12 and 16, the movable slider 33 comprises a connecting shaft, the seat plate 2 is provided with a towing strap hole, one end of the towing strap 23 passes around the connecting shaft and passes through the towing strap 23 hole, and the size of the end is larger than that of the towing strap hole. The size of the end part is larger than the size of the traction hole, one end of the traction belt 23 can be fixed on the seat plate 2, the movable sliding block 33 is wound and connected in a mode of bypassing the connecting shaft, so that when locking mechanisms are arranged on two sides of the seat plate as shown in the figure, two ends of the traction belt are fixed on the traction hole of the seat plate 2, the movable sliding blocks 33 on two sides can be pulled simultaneously by pulling the middle part of the traction belt 23, external force is applied to the unlocking blocks 32 on two sides simultaneously, and locking of the backrest rod 4 is released.

In some embodiments, as shown in fig. 1 to 7, the frame body 1 includes a handle bar 13, a front leg bar 11 and a rear leg bar 12, the handle bar 13 is connected to the front leg bar 11 and/or the rear leg bar 12 through a rotational joint 131, a locking device for locking a rotational position of the handle bar 13 is provided on the rotational joint 131, the locking device is connected to the movable slider 33 through a second rope 132, and is configured to release locking of the rotational position of the handle bar 13 by the locking device through the second rope 132 when the traction belt 23 drives the movable slider 33 to slide. This setting can utilize pulling to pull area 23 and relieve locking and locking to back pole 4 and handspike 13 simultaneously to only need pull area 23 can carry out the folding operation to the frame, convenient and fast.

In some embodiments, as shown in fig. 9, 10 and 12, the seat plate 2 is further provided with a guide pulley 35, and the first rope 34 is wound around the guide pulley 35. This arrangement makes the transmission direction of the pulling force of the first rope 34 on the moving slider 33 to the unlocking block 32 more appropriate, thereby being more labor-saving and efficient.

In some embodiments, as shown in fig. 9, 10 and 12, elastic return means are further provided between the moving slider 33 and the seat plate 2 and/or between the unlocking block 32 and the base 31. A slider return spring 331 may be provided between the moving slider 33 and the seat plate 2, and an unlocking block return spring 321 may be provided between the unlocking block 32 and the base 31.

In some embodiments, the locking mechanism includes two or more locking positions, the two or more locking positions correspond to different backrest angles of the backrest lever 4, the backrest lever 4 is further provided with an adjusting member 41, the adjusting member 41 is connected with the locking member 36 through a third rope 362, and the adjusting member 41 is configured to pull the locking member 36 out of the locking positions through the third rope 362 when the backrest lever 4 is locked. The backrest rod 4 can have different backrest angles when being locked at different locking positions, so that the backrest comfort of different users can be better matched, and meanwhile, the adjustment of the backrest angle of the backrest rod 4 can be more convenient due to the arrangement of the adjusting piece 41 and the third rope 362.

In some embodiments, as shown, the frame body 1 further includes a rear foot bar 12 and a front foot bar 11. The rear foot bar 12 is used for mounting the rear wheels of the baby carriage, and the base 31 is hinged on the rear foot bar 12; the front foot rod 11 is hinged with the rear foot rod 12 and is used for mounting the front wheels of the baby carriage; the seat plate 2 includes a first plate 21, a second plate 22, and a restricting structure. The first plate 21 is fixed relative to the base 31; one end of the second plate body 22 is hinged with the front foot rod 11, and the other end is hinged with the first plate body 21; the limiting structure is used for limiting the relative rotation angle of the first plate body 21 and the second plate body 22. This setting, through the folding of back foot pole 12 with preceding foot pole 11, can drive the folding of the first plate 21 and the second plate 22 of seat board 2 to can reduce the shared space volume of seat board 2 in fold condition, further reduce the shared space volume of frame. When expanding preceding foot pole 11 and back foot pole 12, can drive first plate body 21 and the relative rotation of second plate body 22, the setting of limit structure can be when the expansion state with first plate body 21 and second plate body 22 restriction to operating condition, as shown in fig. 1 to fig. 4 for the state of first plate body 21 and second plate body 22 parallel and level, make seat board 2 can conveniently fold, simultaneously can also bear the weight of the work reliably steadily.

In some embodiments, a first protrusion is disposed on an end portion of the first plate 21 close to the second plate 22, a first groove matched with the first protrusion is disposed on an end portion of the second plate 22 close to the first plate 21, and/or a second groove is disposed on an end portion of the first plate 21 close to the second plate 22, and a second protrusion matched with the second groove is disposed on an end portion of the second plate close to the first plate; the first protrusion and the first groove and/or the second protrusion and the second groove cooperate to block the first board 21 and the second board 22 from further rotating relatively in the direction. As shown in the figure, the first protrusion and the second protrusion may be configured to be a protrusion structure 241 with an edge, the first groove and the second groove may be correspondingly configured to be a groove structure 242 with a planar groove bottom matched with the protrusion structure 241, when the rear foot rod 12 and the front foot rod 11 are unfolded to drive the first plate 21 and the second plate 22 to rotate relatively, when the protrusion structure 241 and the groove structure 242 are matched, the first plate 21 and the second plate 22 may be limited from further rotation, so that the seat board 2 can stably work.

In some embodiments, a stroller is also disclosed, comprising the frame described above.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (14)

1. A frame for a stroller having a collapsed state and an expanded state, the frame comprising:

a frame body (1);

the seat plate (2) is arranged on the frame body (1);

the locking mechanism comprises a base (31) hinged with the frame body (1) and fixed relative to the seat plate (2);

a backrest lever (4) hinged on the base (31);

the lock mechanism is configured to lock rotation of the back lever (4) with respect to the base (31) in the deployed state, and to release the lock of the rotation of the back lever (4) so that the back lever (4) is rotatable with respect to the base (31) before the frame is switched from the deployed state to the folded state.

2. Frame according to claim 1, characterized in that a torsion spring (42) is further provided between the backrest lever (4) and the base (31), said torsion spring (42) being adapted to provide a resilient force to the backrest lever (4) to cause the backrest lever (4) to tend to rotate in the folding direction with respect to the base (31).

3. The vehicle frame of claim 1, wherein said locking mechanism comprises:

at least one locking position provided on the base (31);

a locking member (36) slidably connected to an end of the back lever (4) for cooperating with the locking position to lock the back lever (4);

and the first elastic device (361) is arranged between the backrest rod (4) and the locking piece (36) and is used for providing elastic force for enabling the locking piece (36) to tend to lock when the backrest rod (4) is locked.

4. A frame as claimed in claim 3, wherein the latch mechanism further comprises a latch release (32) movable relative to the base (31) for movement, when subjected to an externally applied force, to urge the latch member (36) against the resilient force provided by the first resilient means (361) and out of the latched position.

5. Frame as in claim 4, characterized in that said seat plate (2) is further provided with a traction belt (23) connected to said unlocking block (32) for moving said unlocking block (32) when subjected to an externally applied pulling force, so as to unlock said backrest rod (4) by said locking mechanism.

6. The frame of claim 5, characterized in that the frame further comprises a moving slider (33) slidably connected to the seat plate (2), the traction belt (23) is connected to the moving slider (33), the moving slider (33) is connected to the unlocking block (32) through a first rope (34), and the traction belt (23) drives the moving slider (33) to slide when being pulled so as to drive the rope to pull the unlocking block (32) to move.

7. Frame according to claim 6, characterized in that the moving slide (33) comprises a connecting shaft, in that the seat plate (2) is provided with a towing eye, in that an end of the towing strap (23) is passed around the connecting shaft and through the towing eye, the end having a larger size than the towing eye.

8. The frame according to claim 6, characterized in that the frame body (1) comprises a hand push rod (13), a front foot rod (11) and a rear foot rod (12), the hand push rod (13) is connected to the front foot rod (11) and/or the rear foot rod (12) through a rotary joint, a locking device for locking the rotary position of the hand push rod (13) is arranged on the rotary joint, the locking device is connected with the movable slider (33) through a second rope (132), and the locking device is configured to release the locking of the rotary position of the hand push rod (13) through the second rope (132) when the traction belt (23) drives the movable slider (33) to slide.

9. Frame according to claim 6, characterized in that the seat plate (2) is further provided with a guide pulley (35), the first cable (34) being wound around the guide pulley (35).

10. Frame according to claim 8, characterized in that elastic return means are also provided between said mobile slider (33) and said seat plate (2) and/or between said unlocking block (32) and said base (31).

11. Frame according to claim 3, characterized in that the locking mechanism comprises two or more locking positions corresponding to different backrest angles of the backrest lever (4), the backrest lever (4) is further provided with an adjusting member (41), the adjusting member (41) is connected with the locking member (36) through a third rope (362), and the adjusting member (41) is used for pulling the locking member (36) out of the locking positions through the third rope (362) when the backrest lever (4) is locked.

12. The vehicle frame of claim 1,

the frame body (1) further comprises:

a rear foot bar (12) for mounting the rear wheels of the stroller, the base (31) being hinged to the rear foot bar;

the front foot rod (11) is hinged with the rear foot rod (12) and is used for mounting the front wheels of the baby carriage;

the seat plate (2) includes:

a first plate (21) fixed to the base (31);

one end of the second plate body (22) is hinged with the front foot rod, and the other end of the second plate body is hinged with the first plate body (21);

and the limiting structure is used for limiting the relative rotation angle of the first plate body (21) and the second plate body (22).

13. The frame according to claim 12, wherein a first protrusion is provided on the end of the first plate (21) close to the second plate (22), a first groove matched with the first protrusion is provided on the end of the second plate (22) close to the first plate (21), and/or a second groove is provided on the end of the first plate (21) close to the second plate (22), and a second protrusion matched with the second groove is provided on the end of the second plate (22) close to the first plate (21); the first protrusion and the first groove and/or the second protrusion and the second groove are/is matched to block the first plate body (21) and the second plate body (22) from continuously rotating relatively along the relative rotation direction.

14. A stroller, comprising a frame according to any of claims 1 to 13.

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