CN108839703A - Folding children's cart - Google Patents

Abstract

The invention discloses a foldable children's stroller. The frame includes a chassis, a bottom bar assembly whose central axis is set along the front and rear directions and is pivotally connected to the chassis, wheels respectively connected to the front and rear ends of the bottom bar assembly, and wheels connected to the push rod and the push rod. A foldable folding bracket assembly between the chassis, a wheel opening mechanism is arranged between the folding bracket assembly and the bottom bar assembly, and the wheel opening mechanism drives the bottom bar assembly during the transition process of the folding bracket assembly from the folded state to the open state The rotation makes the wheels open relative to the chassis. When the folding bracket assembly is in the open state, the wheel opening mechanism keeps the wheels in an open position relative to the chassis; a wheel folding mechanism is arranged between the folding bracket assembly or the chassis and the bottom bar assembly. During the transition process of the support assembly from the open state to the folded state, the wheel folding mechanism drives the bottom bar assembly to rotate to make the wheels move closer to the chassis. The foldable children's stroller can be opened or folded with only one operation, which is very simple and fast.

Description

folding stroller

technical field

The invention relates to a folding stroller for children.

Background technique

The folding stroller is a very convenient means of transportation for children. It is easy to fold, small in size and easy to store after folding, which is the demand of consumers for the use of folding strollers. Foldable children's strollers in the prior art generally include a foldable vehicle frame, wheels installed under the vehicle frame, a locking device capable of locking the vehicle frame in an open state, and a baby stroller installed on the vehicle frame. Riding seat. In order to make the folded volume smaller, the wheels of some folding strollers can participate in the folding, and the wheels are folded inward when folding, so that the whole cart is flatter after folding. Then the existing wheel can participate in the folding of the cart, the folding and opening of the wheel need to be operated in a single step, so the folding and opening of the whole cart needs at least two steps to complete, which is not simple and fast enough .

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a foldable stroller for children.

In order to achieve the above object, the technical solution adopted by the present invention is: a foldable children's stroller, which includes a frame with at least two working states, and a locking mechanism for locking the frame in the first working state. The vehicle frame includes a push rod, a chassis, a bottom bar assembly whose central axis extends in the front-rear direction and is rotatably arranged on the chassis, wheels respectively connected to the front and rear ends of the bottom bar assembly, connected between the push rod and the chassis and having an open state and The folding bracket assembly in the folded state, when the vehicle frame is in the first working state, the folding bracket assembly is in the open state, the push rod is away from the chassis, and the bottom rod assembly rotates relative to the chassis to open the wheels relative to the chassis, when the vehicle frame is in the second working state state, the folding bracket assembly is in the folded state, and the push rod and the folding bracket assembly are close to the chassis, and the bottom rod assembly rotates relative to the chassis to make the wheels close to the chassis;

A wheel opening mechanism is arranged between the folding bracket assembly and the bottom bar assembly. During the transition process of the folding bracket assembly from the folded state to the open state, the wheel opening mechanism drives the bottom bar assembly to rotate so that the wheels are opened relative to the chassis. When the folding bracket assembly When the assembly is in the open state, the wheel opening mechanism keeps the wheel in an open position relative to the chassis; During the process, the wheel folding mechanism drives the bottom bar assembly to rotate so that the wheels move closer to the chassis.

Further, the folding bracket assembly includes a driving rod whose lower part is rotatably connected to the chassis, and the wheel opening mechanism includes a driving surface that is arranged on the bottom rod assembly and is in slidable contact with the driving rod and can be disengaged. When the folding bracket assembly is in the In the folded state, the driving rod is separated from the driving surface. When the folding bracket assembly transitions from the folded state to the open state, the driving rod is in slidable contact with the driving surface. When the folding bracket assembly is in the open state, the driving rod against the drive surface.

Furthermore, the lower part of the driving rod is rotatably connected to the rear part of the chassis, and the driving surface is arranged on the rear part of the bottom rod assembly, and the driving surface includes a slope that is in slidable contact with the driving rod and can be disengaged, and is connected with the slope And the resisting surface detachably offset against the driving rod, when the folding brace assembly is in the folded state, the driving rod is separated from the inclined surface and the resisting surface, and when the folding brace assembly transitions from the folded state to the opened state, the driving rod The driving rod is separated from the resisting surface and slidably contacted with the inclined surface. When the folding bracket assembly is in an open state, the driving rod is separated from the inclined surface and is tightly pressed against the resisting surface.

Furthermore, the lower part of the driving rod is rotatably connected with the front part of the chassis, the driving surface is arranged on the front part of the bottom rod assembly, and the driving surface is a cylindrical surface.

Further, the wheel folding mechanism is arranged between the chassis and the bottom bar assembly, the wheel folding mechanism includes a torsion spring arranged between the chassis and the bottom bar assembly, and the torsion spring exerts force on the bottom bar assembly to make it rotate and make the wheels move closer to the chassis .

Further, the folding bracket assembly includes a lower sleeve slidably connected to the chassis forward and backward, a front strut whose lower part is rotatably connected to the lower sleeve and whose upper part is rotatably connected to the lower part of the push rod.

Furthermore, the folding bracket assembly also includes a driving rod whose lower part is rotatably connected to the rear part of the chassis, a connecting rod whose upper part is rotatably connected to the push rod and whose lower part is rotatably connected to the upper part of the driving rod, and is rotatably connected to the connecting rod The upper sliding sleeve, the seat post which is slidably connected with the upper sliding sleeve and the rear part is rotatably connected with the front strut, and the driving rod is rotatably connected with the front strut.

Furthermore, the wheel folding mechanism is arranged between the folding bracket assembly and the bottom rod assembly, the wheel folding mechanism includes a pair of spiral slopes respectively arranged on the lower sleeve and the bottom rod assembly, and the connection between the lower sleeve and the bottom rod assembly passes through the The helical inclined surfaces are in contact with each other in a slidable and detachable manner. When the folding bracket assembly is in the open state, the lower sleeve is separated from the bottom bar assembly. The rod assemblies slidably contact each other via the helical ramp and cause the bottom rod assembly to rotate and bring the wheel closer to the chassis.

Further, the bottom bar assembly includes a front bar, a rear bar whose front part is slidably connected to the rear part of the front bar, and the rear bar is slidably and telescopically connected to the chassis, and the front end of the front bar and the rear end of the rear bar are respectively connected to the wheels, When the vehicle frame is in the first working state, the rear rod slides backward and stretches out relative to the chassis; when the vehicle frame is in the second working state, the rear rod slides forward and retracts relative to the chassis.

Furthermore, the folding bracket assembly includes a rear strut whose lower part is rotatably connected to the rear part of the chassis, and a rear link whose upper part is rotatably connected to the rear strut and whose lower part is rotatably connected to the rear bar.

Furthermore, the folding bracket assembly also includes a driving rod whose upper part is rotatably connected to the lower part of the push rod and the lower part is rotatably connected to the front part of the chassis, and the lower part is rotatably connected to the upper part of the rear brace and the upper part is rotatably connected to the push rod The connected connecting rod, the upper sliding sleeve slidably connected on the rear support rod, and the driving rod are rotatably connected with the upper sliding sleeve.

Further, the bottom rod assembly is passed through the chassis, and the front and rear ends of the bottom rod assembly protrude from the chassis to connect with the wheels.

Further, the folding bracket assembly includes a driving rod whose lower part is rotatably connected to the rear part of the chassis, a front strut whose lower part is rotatably connected to the front part of the chassis and whose upper part is rotatably connected to the lower part of the push rod, and whose upper part is connected to the push rod. The connecting rod which is rotatably connected and the lower part is rotatably connected to the upper part of the driving rod, is slidably connected to the upper sliding sleeve of the driving rod, and the front strut is rotatably connected to the upper sliding sleeve.

Further, the folding bracket assembly includes a driving rod whose lower part is rotatably connected to the rear part of the chassis, a front strut whose lower part is rotatably connected to the front part of the chassis and whose upper part is rotatably connected to the lower part of the push rod, and whose upper part is connected to the push rod. The connecting rod which is connected in rotation and the lower part is connected in rotation with the upper part of the driving rod, and the upper sliding sleeve which is slidably connected to the front strut, and the driving rod is connected in rotation with the upper sliding sleeve.

Further, the folding bracket assembly includes a driving rod whose lower part is rotatably connected to the rear part of the chassis, a front strut whose lower part is rotatably connected to the front part of the chassis and whose upper part is rotatably connected to the lower part of the push rod, and whose upper part is connected to the push rod. The connecting rod connected in rotation, the auxiliary driving rod whose upper part is connected in rotation with the lower part of the connecting rod and whose lower part is connected in rotation with the upper part of the driving rod, and the front strut is connected in rotation with the auxiliary driving rod.

By adopting the above-mentioned technical scheme, when the folding stroller of the present invention is unfolding and folding the vehicle frame, under the action of the wheel opening mechanism and the wheel folding mechanism, the wheels can be opened and folded together with the vehicle frame, eliminating the need for a separate A separate operating step is carried out for the unfolding or folding of the wheels. Therefore, only one operation is required to complete the opening or folding of the whole vehicle, which is very simple and fast. The frame structure of the foldable children's stroller cooperates with the wheel opening mechanism and the wheel folding mechanism, so that the whole vehicle has a simple and compact structure, is easy to operate, and is flat and very small in volume after being folded.

Description of drawings

Accompanying drawing 1 is the three-dimensional structure schematic diagram of the foldable stroller in the first embodiment of the present invention when it is opened;

Accompanying drawing 2 is the schematic structural view of the bottom bar assembly of the folding stroller in Embodiment 1 of the present invention;

Accompanying drawing 3 is the schematic diagram of the side view structure of the foldable stroller in Embodiment 1 of the present invention when it is opened;

Accompanying drawing 4 is the three-dimensional structural schematic diagram of the folding stroller in the first embodiment of the present invention during the folding process;

Accompanying drawing 5 is the side view structural diagram of the folding stroller in the first embodiment of the present invention during the folding process;

Accompanying drawing 6 is the three-dimensional structural diagram of the foldable stroller in Embodiment 1 of the present invention when it is folded;

Accompanying drawing 7 is the side view structural diagram of the foldable stroller in Embodiment 1 of the present invention when it is folded;

Figure 8 is a schematic structural view of the wheel opening mechanism of the foldable stroller in Embodiment 1 of the present invention, at this time the foldable stroller is folded;

Accompanying drawing 9 is a structural schematic diagram of the wheel opening mechanism of the foldable stroller in Embodiment 1 of the present invention, and the foldable stroller is being opened at this time;

Figure 10 is a structural schematic diagram of the wheel opening mechanism of the foldable stroller in Embodiment 1 of the present invention, and the foldable stroller is opened at this time;

Accompanying drawing 11 is the schematic structural diagram of the wheel folding mechanism of the foldable stroller in Embodiment 1 of the present invention;

Figure 12 is a structural schematic diagram of the wheel folding mechanism of the folding stroller in Embodiment 2 of the present invention, and the folding stroller is being folded at this time;

Accompanying drawing 13 is the structural schematic diagram of the wheel folding mechanism of the foldable stroller in Embodiment 2 of the present invention, at this time the foldable stroller is folded;

Accompanying drawing 14 is the side view structural diagram of the folding stroller in the third embodiment of the present invention during the folding process;

Accompanying drawing 15 is the side view structural diagram of the folding stroller in the fourth embodiment of the present invention during the folding process;

Accompanying drawing 16 is the side view structural diagram of the folding stroller in the fifth embodiment of the present invention during the folding process;

Accompanying drawing 17 is the three-dimensional structural schematic diagram of the foldable stroller in Embodiment 6 of the present invention when it is opened;

Accompanying drawing 18 is the side view structural diagram of the foldable baby stroller in the sixth embodiment of the present invention when it is opened

Accompanying drawing 19 is the side view structural diagram of the foldable baby stroller in the sixth embodiment of the present invention during the folding process;

Figure 20 is a schematic structural view of the wheel opening mechanism of the foldable stroller in Embodiment 6 of the present invention. At this time, the foldable stroller is folded;

Figure 21 is a schematic structural view of the wheel opening mechanism of the foldable stroller in Embodiment 6 of the present invention, and the foldable stroller is being opened at this time;

Figure 22 is a schematic structural view of the wheel opening mechanism of the foldable stroller in Embodiment 6 of the present invention, and the foldable stroller is opened at this time;

Accompanying drawing 23 is the schematic cross-sectional structure diagram of the chassis and the bottom bar assembly of the foldable stroller for children in the sixth embodiment of the present invention.

The labels in the figure are:

1, push rod; 2, front strut; 201, bump; 202, support surface; 3, connecting rod; 4, seat post; 5, upper sliding sleeve; 6, rear strut; 7, lower sleeve; 8, Chassis; 9. Bottom rod assembly; 901. Front rod; 902. Rear rod; 10. Wheel; 11. Rotation point; 12. Inclined surface; 13. Resisting surface; 14. Torsion spring; Frame assembly; 17, auxiliary rear strut; 18, cylindrical surface; 19, rear connecting rod; 20, guide groove.

Detailed ways

Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

Embodiment one

Referring to accompanying drawings 1 to 11, the foldable children's stroller in this embodiment includes a vehicle frame with at least two working states, a locking mechanism for locking the vehicle frame in the first working state, and a Seat.

The vehicle frame includes a push rod 1, a chassis 8, a bottom bar assembly 9 whose central axis is set along the front-rear direction and is pivotally connected to the chassis 8, wheels 10 respectively connected to the front and rear ends of the bottom bar assembly 9, and connected between the push rod 1 and the chassis. The foldable folding bracket assembly 16 between 8, when the vehicle frame is in the first working state (that is, when the folding stroller is fully opened), the folding bracket assembly 16 is in the open state, and the folding bracket assembly 16 is propped up Make the push rod 1 away from the chassis 8, the bottom bar assembly 9 rotates relative to the chassis 8 so that the wheels 10 are opened relative to the chassis 8 and the rotation axis of the wheels 10 is parallel to the ground. When it is folded), the folding bracket assembly 16 is in the folded state, and the folding bracket assembly 16 draws in toward the chassis 8 and drives the push rod 1 to draw in toward the chassis. Moving closer, the bottom bar assembly 9 rotates relative to the chassis 8 to make the wheels 10 move closer to the chassis 8 and the rotation axis of the wheels 10 is perpendicular to the ground.

As shown in Figures 1 and 2 , the bottom rod assembly 9 is a rigid rod that is passed through the chassis 8 , and the front and rear ends of the bottom rod assembly 9 protrude from the chassis 8 and are rigidly connected with the wheels 10 .

The folding bracket assembly 16 includes a driving rod whose lower part is rotatably connected to the chassis 8 . In this embodiment, the chassis 8 and the driving rod are rotatably connected through a pivot point 11 . A wheel opening mechanism is arranged between the driving rod and the bottom bar assembly 9, and during the transition process of the folding bracket assembly 16 from the folded state to the open state, the wheel opening mechanism drives the bottom bar assembly 9 to rotate so that the wheels 10 turn outward relative to the chassis 8 Open, when the folding bracket assembly 16 is in the open state, the wheel opening mechanism keeps the wheel 10 in an open position relative to the chassis 8; a wheel folding mechanism is arranged between the folding bracket assembly 16 or the chassis 8 and the bottom bar assembly 9, During the transition process of the folding bracket assembly 16 from the open state to the folded state, the wheel folding mechanism drives the bottom rod assembly 9 to rotate so that the wheel 10 turns inward and moves closer to the chassis 8 .

The above-mentioned folding bracket assembly 16 includes a driving rod whose lower part is rotatably connected to the chassis 8. The wheel opening mechanism includes a driving surface that is arranged on the bottom rod assembly 9 and is in slidable contact with the driving rod and can be disengaged. When the assembly 16 is in the folded state, the driving rod is separated from the driving surface. When the folding bracket assembly 16 transitions from the folded state to the open state, the driving rod is in slidable contact with the driving surface. When the folding bracket assembly 16 is in the open state state, the drive rod is against the drive surface.

In the present embodiment shown in accompanying drawing 1, accompanying drawing 8 to 10, the wheel opening mechanism is arranged at the place close to rear wheel, and above-mentioned driving lever is rear strut 6, and the bottom of rear strut 6 and chassis 8 The rear portion of the bottom bar assembly 9 is rotatably connected, as shown at A in the accompanying drawing 1, the above-mentioned driving surface is arranged at the rear portion of the bottom bar assembly 9, and the driving surface includes being arranged at the rear portion of the bottom bar assembly 9 and can be connected with the rear strut 6. Slidingly contacting and detachable inclined surface 12, connected with the inclined surface 12 and detachably abutted against the rear strut 6, when the folding brace assembly 16 is in the folded state, the rear strut 6 and the inclined surface 12 , the resisting surface 13 are all separated, when the folding brace assembly 16 transitions from the folded state to the open state, the rear stay 6 is separated from the resisting surface 13 and is in slidable contact with the inclined surface 12, when the folding brace assembly 16 When in an open state, the rear strut 6 breaks away from the inclined surface 12 and is pressed against the resisting surface 13 .

In this embodiment shown in accompanying drawing 4 and accompanying drawing 11, the wheel folding mechanism is arranged between the chassis 8 and the bottom bar assembly 9, and is close to the front wheel, as shown in accompanying drawing 4 at B, the wheel folding mechanism It includes a torsion spring 14 arranged between the chassis 8 and the bottom bar assembly 9 , the torsion spring 14 exerts force on the bottom bar assembly 9 to make it rotate and make the wheels 10 move closer to the chassis 8 .

As shown in accompanying drawings 1 to 7, the folding bracket assembly 16 in this embodiment also includes a sliding sleeve 7 that is slidably connected back and forth on the chassis 8, the lower part is rotationally connected with the sliding sleeve 7 and the upper part is connected with the push rod 1 The front strut 2 which is rotatably connected to the lower part, the connecting rod 3 which is rotatably connected to the upper part of the push rod 1 and the lower part is rotatably connected to the upper part of the rear strut 6, the upper sliding sleeve 5 which is rotatably connected to the connecting rod 3, and the upper The sliding sleeve 5 is slidably connected and the rear part is rotatably connected to the front strut 2. The rear strut 6 is rotatably connected to the front strut 2. The push rod 1, the connecting rod 3, the rear strut 6 and the front strut Rod 2 constitutes a four-bar linkage, and front strut 2, rear strut 6, chassis 8 and sliding sleeve 7 constitute a crank slider mechanism.

working principle:

①When the cart is folded, the push rod 1 rotates forward and downward, driving the front strut 2 and the connecting rod 3 to rotate downward, the upper sliding sleeve 5 slides backward along the seat post 4 while rotating on the connecting rod 3, and the rear support The rod 6 (that is, the driving rod) and the seat post 4 are driven by the front strut 2 and the connecting rod 3 to rotate and move closer to the chassis 8, while the lower sleeve 7 rotates with the front strut 2 and slides forward along the chassis 8, Until all rods are close to the chassis 8, the vehicle frame is fully folded. During the folding process of the vehicle frame, due to the rotation of the rear strut 6, its bottom is disengaged from the resisting surface 13 and the inclined surface 12 on the bottom bar assembly 9, and the force given by the resisting surface 13 and the inclined surface 12 is lost, so that the bottom bar The component 9 rotates relative to the chassis 8 under the action of the torsion spring 14, and drives the wheels 10 to move closer to the chassis 8 until the folding of the whole vehicle is completed.

②When opening the cart, the operation process is opposite to the above-mentioned folding operation process. Turn the push rod 1 upwards and backwards to drive the front strut 2 and connecting rod 3 to rotate upwards, and the upper sliding sleeve 5 rotates and slides forward along the seat post 4 at the same time , the rear strut 6 and the seat post 4 rotate under the drive of the front strut 2 and the connecting rod 3 and open relative to the chassis 8, and the sliding sleeve 7 slides backward along the chassis 8 while rotating with the front strut 2, until all The rods are relatively opened, and the vehicle frame is fully opened. During the opening process of the vehicle frame, due to the rotation of the rear strut 6, its bottom is in contact with the slope 12 on the bottom rod assembly 9 and slides along the slope 12, and the bottom rod assembly 9 is overcome by the push of the rear strut 6. The power of the torsion spring 14 rotates, driving the wheels 10 to open relative to the chassis 8. When the whole vehicle is opened, the bottom of the rear strut 6 slides onto the resisting surface 13 and is pressed against the resisting surface 13, so that the bottom rod assembly 9 and the wheel 10 remains in the current state and will not be folded due to the force of the torsion spring 14, so far the opening of the whole vehicle is completed.

When the folding stroller is opened and folded, under the action of the wheel opening mechanism and the wheel folding mechanism, the wheels can be opened and folded together with the frame, and a single operation step is no longer required. The opening or folding of the wheels. Therefore, only one operation is required to complete the opening or folding of the whole vehicle, which is very simple and fast. The frame structure of the foldable children's stroller cooperates with the wheel opening mechanism and the wheel folding mechanism, so that the whole vehicle has a simple and compact structure, is easy to operate, and is flat and very small in volume after being folded.

Embodiment two

Referring to accompanying drawings 12 and 13, the structure of the foldable children's stroller in this embodiment is the same as that of the vehicle frame and the wheel opening mechanism in Embodiment 1, and the difference is only in the structure of the wheel folding mechanism.

The wheel folding mechanism in this embodiment is arranged between the folding bracket assembly 16 and the bottom rod assembly 9 . The wheel folding mechanism includes a pair of spiral slopes 15 respectively arranged on the lower sleeve 7 and the bottom rod assembly 9 , preferably, the spiral slope 15 on the bottom rod assembly 9 is arranged at the front end of the bottom rod assembly 9 . The lower sleeve 7 and the bottom rod assembly 9 are in slidable and detachable contact through the spiral slope 15. When the folding bracket assembly 16 is in the open state, the lower sleeve 7 is separated from the bottom rod assembly 9. When the folding bracket During the transition of the assembly 16 from the open state to the folded state, the lower sleeve 7 and the bottom rod assembly 9 are in slidable contact through the helical slope 15 to rotate the bottom rod assembly 9 and make the wheels 10 move closer to the chassis 8 .

working principle:

① When folding the stroller, the folding of the frame is the same as that in Embodiment 1, and will not be described here. During the folding process of the vehicle frame, due to the rotation of the rear strut 6 (that is, the driving rod), its bottom is separated from the resisting surface 13 and the inclined surface 12 on the bottom rod assembly 9, and the lower sleeve 7 slides forward to make the lower sleeve 7 The bottom bar assembly 9 is in contact with the front part of the bottom rod assembly 9 through the spiral slope 15, and as the lower sleeve 7 continues to slide forward, under the action of the spiral slope 15, the bottom rod assembly 9 is pushed to rotate, driving the wheels 10 to move closer to the chassis 8, Until the folding of the whole car is completed.

2. When opening the cart, the opening of the vehicle frame is also the same as in Embodiment 1. In the process of opening the stroller, due to the sliding of the lower sleeve 7 backwards, it is disengaged from the bottom bar assembly 9, and at the same time, due to the rotation of the rear strut 6, its bottom contacts the inclined surface 12 on the bottom bar assembly 9 and moves along the inclined surface. 12 slides, the bottom bar assembly 9 rotates under the push of the rear strut 6, and drives the wheel 10 to open relative to the chassis 8. When the whole vehicle is opened, the bottom of the rear strut 6 slides onto the resisting surface 13 and resists against the resisting surface 13 tight, so that the bottom rod assembly 9 and the wheel 10 remain in the current state, and the opening of the whole vehicle is completed so far.

Embodiment three

Referring to accompanying drawing 14, the structure of the foldable stroller in this embodiment is the same as that of the wheel opening mechanism and the wheel folding mechanism in Embodiment 1, the only difference lies in the structure of the folding bracket assembly 16 in the vehicle frame.

The folding bracket assembly 16 in this embodiment includes a rear strut 6 (that is, a drive rod) whose lower part is rotatably connected to the rear part of the chassis 8, the lower part is rotatably connected to the front part of the chassis 8, and the upper part is rotatably connected to the lower part of the push rod 1. The front strut 2 that is rotatably connected, the upper part that is rotatably connected with the push rod 1 and the connecting rod 3 that is rotatably connected with the upper part of the rear strut 6, the upper sliding sleeve 5 that is slidably connected to the rear strut 6, and the front strut 2 is connected with the upper sliding sleeve 5 in rotation, the push rod 1, the connecting rod 3, the front strut 2, the rear strut 6 and the upper sliding sleeve 5 form a crank slider mechanism, the front strut 2, the rear strut 6, and the chassis 8 And upper sliding sleeve 5 constitutes the slider crank mechanism.

working principle:

①When the cart is folded, the push rod 1 rotates forward and downward, driving the front strut 2 and the connecting rod 3 to rotate downward, and the rear strut 6 (that is, the driving rod) is driven by the front strut 2 and the connecting rod 3 Rotate and move closer to the chassis 8, the upper sliding sleeve 5 and the front strut 2 rotate and slide down along the rear strut 6, until all the rods are close to the chassis 8, and the vehicle frame is completely folded. The folding of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

②When opening the cart, the operation process is opposite to the above-mentioned folding operation process. Turn the push rod 1 upwards and backwards to drive the front strut 2 and the connecting rod 3 to rotate upwards. Drive down and rotate and open relative chassis 8, upper sliding sleeve 5 and front strut 2 rotate upwards along rear strut 6 while sliding, all relative chassis 8 is opened to all rods, and vehicle frame is fully opened. The opening of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

Embodiment Four

Referring to accompanying drawing 15, the structure of the foldable stroller in this embodiment is the same as that of the wheel opening mechanism and the wheel folding mechanism in Embodiment 1, the only difference lies in the structure of the folding bracket assembly 16 in the vehicle frame.

The folding bracket assembly 16 in this embodiment includes a rear strut 6 (that is, a drive rod) whose lower part is rotatably connected to the rear part of the chassis 8, the lower part is rotatably connected to the front part of the chassis 8, and the upper part is rotatably connected to the lower part of the push rod 1. The front strut 2 that is rotatably connected, the upper part that is rotatably connected with the push rod 1 and the connecting rod 3 that is rotatably connected with the upper part of the rear strut 6, the upper sliding sleeve 5 that is slidably connected to the front strut 2, and the rear strut 6 is rotationally connected with the upper sliding sleeve 5, the push rod 1, the connecting rod 3, the front strut 2, the rear strut 6 and the upper sliding sleeve 5 form a crank slider mechanism, the front strut 2, the rear strut 6, and the chassis 8 And upper sliding sleeve 5 constitutes the slider crank mechanism.

working principle:

①When the cart is folded, the push rod 1 rotates forward and downward, driving the front strut 2 and the connecting rod 3 to rotate downward, and the rear strut 6 (that is, the driving rod) is driven by the front strut 2 and the connecting rod 3 Rotate and move closer to the chassis 8, when the upper sliding sleeve 5 rotates with the rear strut 6, slide down along the front strut 2 until all the rods move closer to the chassis 8, and the vehicle frame is completely folded. The folding of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

②When opening the cart, the operation process is opposite to the above-mentioned folding operation process. Turn the push rod 1 upwards and backwards to drive the front strut 2 and the connecting rod 3 to rotate upwards. Drive down and rotate and open relative chassis 8, upper sliding sleeve 5 and rear strut 6 rotate upwards along front strut 2 while sliding, all relative chassis 8 is opened to all rods, and vehicle frame is fully opened. The opening of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

Embodiment five

Referring to accompanying drawing 16, the structure of the foldable stroller in this embodiment is the same as that of the wheel opening mechanism and the wheel folding mechanism in Embodiment 1, the only difference lies in the structure of the folding bracket assembly 16 in the vehicle frame.

The folding bracket assembly 16 in this embodiment includes a rear strut 6 (that is, a drive rod) whose lower part is rotatably connected to the rear part of the chassis 8, the lower part is rotatably connected to the front part of the chassis 8, and the upper part is rotatably connected to the lower part of the push rod 1. The front strut 2 which is rotatably connected, the connecting rod 3 whose upper part is rotatably connected with the push rod 1, the auxiliary rear strut 17 whose upper part is rotatably connected with the lower part of the connecting rod 3 and whose lower part is rotatably connected with the upper part of the rear strut 6 , the front strut 2 is rotationally connected with the auxiliary rear strut 17, the push rod 1, the connecting rod 3, the auxiliary rear strut 17 and the front strut 2 constitute a four-bar linkage mechanism, the front strut 2, the auxiliary rear strut 17, The rear strut 6 and the chassis 8 constitute a four-bar linkage.

working principle:

①When the cart is folded, the push rod 1 rotates forward and downward, driving the front strut 2 and the connecting rod 3 to rotate downward, and the auxiliary rear strut 17 is driven by the front strut 2 and the connecting rod 3 to rotate and move toward the chassis. 8 moves closer, and the rear strut 6 (being the driving rod) rotates under the drive of the auxiliary rear strut 17 and moves closer to the chassis 8 until all rods are moved closer to the chassis 8, and the vehicle frame is completely folded. The folding of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

②When opening the cart, the operation process is opposite to the above-mentioned folding operation process. Turn the push rod 1 upwards and backwards to drive the front strut 2 and the connecting rod 3 to rotate upwards. Rotate under the drive and open relative to chassis 8, rear strut 6 rotates under the drive of auxiliary rear strut 17 and open relative chassis 8, all relative chassis 8 is opened to all rods, vehicle frame is fully opened. The opening of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

Embodiment six

Referring to accompanying drawings 17 to 23, compared with Embodiment 1, the foldable stroller in this embodiment has a wheel opening mechanism arranged near the front wheel, and the driving rod mentioned above is the front strut 2, and the front strut 2 The lower part is rotatably connected with the front part of the chassis 8, as shown at position C in FIG. Specifically, the bottom of the front strut 2 has a projection 201, on which a supporting surface 202 is arranged, when the folding brace assembly 16 is in the folded state, the projection 201 is separated from the cylindrical surface 18, when the folding brace During the transition of the frame assembly 16 from the folded state to the open state, the projection 201 is in slidable contact with the cylindrical surface 18, and when the folded support assembly 16 is in the open state, the supporting surface 202 on the projection 201 abuts against the cylindrical surface 18 on.

The folding stroller in this embodiment can also be folded in the front and rear directions while being folded up and down. Specifically, as shown in Figure 23, the bottom bar assembly 9 includes a front bar 901, a front part and a rear part of the front bar 901. The rear rod 902 is slidably connected, and the rear rod 902 is slidably and telescopically connected with the chassis 8. The front end of the front rod 901 and the rear end of the rear rod 902 are respectively connected to the wheels 10. When the vehicle frame is in the first working state, the rear rod 902 slides backward and stretches out relative to chassis 8 , and when the vehicle frame is in the second working state, rear rod 902 slides forward and retracts relative to chassis 8 . The above-mentioned driving surface is arranged at the front end of the front rod 901 .

The folding bracket assembly 16 includes a rear strut 6 whose lower part is rotatably connected to the rear of the chassis 8, an upper sliding sleeve 5 that is slidably connected to the rear strut 6 and is rotatably connected to the front strut 2, and an upper part that is connected to the rear strut 2. 6 phases are rotatably connected and the rear link 19 whose lower part is rotatably connected to the rear rod 902, the connecting rod 3 whose lower part is rotatably connected to the upper part of the rear strut 6 and whose upper part is rotatably connected to the push rod 1, and the upper part of the front strut 2 Rotately connected with the lower part of push rod 1, push rod 1, connecting rod 3, front strut 2, rear strut 6 and upper sliding sleeve 5 form a crank slider mechanism, front strut 2, rear strut 6, chassis 8 And the upper sliding sleeve 5 constitutes a slider crank mechanism, and the rear strut 6, the rear connecting rod 19, the chassis 8 and the rear rod 902 constitute a slider crank mechanism. The chassis 8 is provided with a guide groove 20 along the front and rear direction, as shown in FIG. 17 , the lower part of the rear link 19 passes through the guide groove 20 and is connected with the rear rod 902 .

The wheel folding mechanism in this embodiment is the same as that in Embodiment 1.

working principle:

①When the cart is folded, the push rod 1 rotates forward and downward, driving the front strut 2 (that is, the driving rod) and the connecting rod 3 to rotate downward, and the rear strut 6 is driven by the connecting rod 3 to rotate and move closer to the chassis 8 , the rear connecting rod 19 rotates under the drive of the rear strut 6 and moves closer to the chassis 8, until all the rods move closer to the chassis 8 to realize the folding of the vehicle frame in the up and down direction. When the rear link 3 rotates, it drives the rear rod 902 in the bottom rod assembly 9 to slide forward and contract relative to the chassis 8, thereby realizing the folding of the vehicle frame in the front-rear direction. The folding of the wheel 10 is the same as that in the first embodiment, and will not be described here again.

②When opening the cart, the operation process is opposite to the above-mentioned folding operation process. Turn the push rod 1 upwards and backwards to drive the front strut 2 and the connecting rod 3 to rotate upwards, and the rear strut 6 is driven by the connecting rod 3 to rotate and relative to each other. The chassis 8 is opened, and the rear connecting rod 19 rotates under the drive of the rear strut 6 and opens relative to the chassis 8 until all the rods are relatively opened to realize the opening of the vehicle frame in the up and down direction. When the rear connecting rod 19 rotates, it drives the rear rod 902 in the bottom rod assembly 9 to slide backward and protrude relative to the chassis 8, thereby realizing the opening of the vehicle frame in the front-rear direction. During the rotation of the front strut 2 (that is, the driving rod), the protrusion 201 at the bottom end slides along the cylindrical surface 18, pushing the bottom rod assembly 9 (including the front rod 901 and the rear rod 902 ) to rotate, driving the wheel 10 to the chassis 8 Move closer to complete the folding of the wheel 10. And after the stroller is fully opened, the bottom supporting surface 202 abuts against the cylindrical surface 18, so that the bottom rod assembly 9 remains in the current state, so that the wheel 10 remains in the open state relative to the chassis 8.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (16)

1. A folding children's stroller, which includes a vehicle frame with at least two working states, and a locking mechanism for locking the vehicle frame in the first working state, characterized in that: the vehicle frame includes a push rod (1 ), a chassis (8), a bottom bar assembly (9) extending along the front-to-back direction and rotatably arranged on the chassis (8), wheels (10) respectively connected to the front and rear ends of the bottom bar assembly (9), A folding bracket assembly (16) connected between the push rod (1) and the chassis (8) and having an open state and a folded state, when the vehicle frame is in the first working state, the folding bracket assembly (16) is in the open state, the push rod (1) is away from the chassis (8), and the bottom rod assembly (9) rotates relative to the chassis (8) so that the wheels (10) open relative to the chassis (8), when the When the vehicle frame is in the second working state, the folding bracket assembly (16) is in the folded state, and the push rod (1) and the folding bracket assembly (16) are all close to the chassis (8), the The bottom bar assembly (9) rotates relative to the chassis (8) so that the wheels (10) move closer to the chassis (8); A wheel opening mechanism is provided between the folding bracket assembly (16) and the bottom bar assembly (9), and the wheels are opened during the transition process of the folding bracket assembly (16) from the folded state to the opened state. The mechanism drives the bottom bar assembly (9) to rotate to open the wheel (10) relative to the chassis (8). When the folding bracket assembly (16) is in the open state, the wheel opening mechanism makes the wheel ( 10) Keep at the open position relative to the chassis (8); a wheel folding mechanism is provided between the folding bracket assembly (16) or the chassis (8) and the bottom bar assembly (9), and the folding bracket assembly ( 16) During the transition from the open state to the folded state, the wheel folding mechanism drives the bottom bar assembly (9) to rotate so that the wheels (10) move closer to the chassis (8). 2. The foldable baby stroller according to claim 1, characterized in that: the foldable bracket assembly (16) includes a driving rod whose lower part is rotatably connected to the chassis (8), and the wheel opening mechanism includes a set The drive surface on the bottom rod assembly (9) is in slidable contact with the drive rod and can be disengaged. When the folding bracket assembly (16) is in the folded state, the drive rod and the The driving surface is disengaged. When the folding bracket assembly (16) transitions from the folded state to the open state, the driving rod is in slidable contact with the driving surface. When the folding bracket assembly (16) is opened In the state, the driving rod is in tight contact with the driving surface. 3. The foldable children's stroller according to claim 2, characterized in that: the lower part of the driving rod is rotatably connected to the rear part of the chassis (8), and the driving surface is set on the bottom rod assembly (9 ), the driving surface includes an inclined surface (12) that is in slidable contact with the driving rod and can be disengaged, and a resisting surface (13) that is connected with the inclined surface (12) and can be detachably abutted against the driving rod ), when the folding bracket assembly (16) is in the folded state, the driving rod is separated from the inclined surface (12) and the resisting surface (13), when the folding bracket assembly (16) is in the folded state During the transition to the open state, the driving rod is separated from the resisting surface (13) and slidably contacts the inclined surface (12), when the folding bracket assembly (16) is in the open state , the driving rod breaks away from the inclined surface (12) and abuts against the resisting surface (13). 4. The foldable children's stroller according to claim 2, characterized in that: the lower part of the driving rod is rotatably connected with the front part of the chassis (8), and the driving surface is set on the bottom rod assembly (9 ), and the driving surface is a cylindrical surface (18). 5. The foldable children's stroller according to claim 4, characterized in that: the lower part of the driving rod has a bump (201), and the bump (201) is provided with a supporting surface (202), when the When the folding bracket assembly (16) is in the folded state, the protrusion (201) is separated from the cylindrical surface (18), and when the folding bracket assembly (16) transitions from the folded state to the opened state, the The protrusion (201) is in slidable contact with the cylindrical surface (18), and when the folding bracket assembly (16) is in an open state, the supporting surface (202) on the protrusion (201) is against the cylinder surface (18). 6. The folding baby stroller according to claim 1, characterized in that: the wheel folding mechanism is arranged between the chassis (8) and the bottom bar assembly (9), and the wheel folding mechanism includes 8) The torsion spring (14) between the bottom bar assembly (9), the torsion spring (14) exerts force on the bottom bar assembly (9) to make it rotate and make the wheel (10) move closer to the chassis (8) . 7. The foldable children's stroller according to claim 1, characterized in that: the foldable bracket assembly (16) includes a sliding sleeve (7) connected to the chassis (8) slidably back and forth, a lower part A front strut (2) that is rotatably connected to the lower sleeve (7) and whose upper part is rotatably connected to the lower part of the push rod (1). 8. The foldable baby stroller according to claim 7, characterized in that: the wheel folding mechanism is arranged between the folding bracket assembly (16) and the bottom bar assembly (9), and the wheel folding mechanism includes A pair of spiral slopes (15) arranged on the lower sleeve (7) and the bottom rod assembly (9), through which the slide sleeve (7) and the bottom rod assembly (9) can slide and Detachable contact, when the folding bracket assembly (16) is in the open state, the lower sleeve (7) is separated from the bottom bar assembly (9), when the folding bracket assembly (16) is opened During the transition from the state to the folded state, the lower sleeve (7) and the bottom rod assembly (9) are slidably contacted through the spiral slope (15) and the bottom rod assembly (9) is rotated and the wheels ( 10) Move closer to the chassis (8). 9. The foldable children's stroller according to claim 1, characterized in that: the bottom bar assembly (9) includes a front bar (901), and the front part is slidably connected with the rear part of the front bar (901) the rear rod (902), and the rear rod (902) is slidably and telescopically connected to the chassis (8), and the front end of the front rod (901) and the rear end of the rear rod (902) are respectively connected to the wheels ( 10), when the frame is in the first working state, the rear rod (902) slides backward and protrudes relative to the chassis (8); when the frame is in the second working state, the rear rod (902) slides forward and retracts relative to chassis (8). 10. The folding stroller for children according to claim 9, characterized in that: the folding bracket assembly (16) includes a rear strut (6) whose lower part is rotatably connected to the rear part of the chassis (8), an upper part A rear link (19) that is rotatably connected to the rear strut (6) and whose lower part is rotatably connected to the rear rod (902). 11. The folding stroller for children according to claim 1, characterized in that: the bottom bar assembly (9) is installed in the chassis (8), and the front and rear ends of the bottom bar assembly (9) extend out the chassis (8). 12. The foldable children's stroller according to claim 7, characterized in that: the foldable bracket assembly (16) further comprises a driving rod whose lower part is rotatably connected to the rear part of the chassis (8), and whose upper part is connected to the rear part of the chassis (8). The push rod (1) is rotatably connected to the connecting rod (3) whose lower part is rotatably connected to the upper part of the drive rod, the upper sliding sleeve (5) rotatably connected to the connecting rod (3), and the upper The sliding sleeve (5) is slidably connected to the seatpost (4) whose rear part is rotatably connected to the front strut (2), and the drive rod is rotatably connected to the front strut (2). 13. The foldable stroller for children according to claim 1, characterized in that: the foldable bracket assembly (16) includes a driving rod whose lower part is rotatably connected with the rear part of the chassis (8), and whose lower part is connected with the rear part of the chassis (8). The front part of (8) is rotatably connected to the front strut (2) whose upper part is rotatably connected to the lower part of the push rod (1), the upper part is rotatably connected to the push rod (1) and the lower part is connected to the drive The upper part of the rod (6) is rotatably connected to the connecting rod (3), and the upper sliding sleeve (5) that is slidingly connected to the driving rod (6), and the front strut (2) is connected to the upper sliding sleeve (5). Turn to connect. 14. The foldable children's stroller according to claim 1, characterized in that: the foldable bracket assembly (16) includes a driving rod whose lower part is rotatably connected to the rear part of the chassis (8), and the lower part is connected to the rear part of the chassis (8). The front part of (8) is rotatably connected to the front strut (2) whose upper part is rotatably connected to the lower part of the push rod (1), the upper part is rotatably connected to the push rod (1) and the lower part is connected to the drive The upper part of the rod (6) is rotatably connected to the connecting rod (3), and the upper sliding sleeve (5) that is slidingly connected to the front strut (2), and the driving rod (6) is connected to the upper sliding sleeve (5). Turn to connect. 15. The foldable children's stroller according to claim 1, characterized in that: the foldable bracket assembly (16) includes a driving rod whose lower part is rotatably connected to the rear part of the chassis (8), and the lower part is connected to the rear part of the chassis (8). The front part of (8) is rotatably connected to the front strut (2) whose upper part is rotatably connected to the lower part of the push rod (1), and the connecting rod (3) whose upper part is rotatably connected to the push rod (1) An auxiliary drive rod (17) whose upper part is rotatably connected to the lower part of the connecting rod (3) and whose lower part is rotatably connected to the upper part of the drive rod (6), the front strut (2) is connected to the auxiliary drive rod (17) phase rotation connection. 16. The foldable baby stroller according to claim 10, characterized in that: the foldable bracket assembly (16) further includes an upper part that is rotatably connected to the lower part of the push rod (1) and the lower part is connected to the chassis The front part of (8) is rotatably connected to the driving rod, the lower part is rotatably connected to the upper part of the rear strut (6) and the upper part is rotatably connected to the push rod (1), and the connecting rod (3) is slidingly connected On the upper sliding sleeve (5) on the rear support rod (6), the driving rod is rotatably connected with the upper sliding sleeve (5).