CN112224268B - Frame folding mechanism and baby stroller - Google Patents

Abstract

The invention discloses a folding mechanism of various frames and a baby stroller, wherein the baby stroller comprises a pair of bottom tubes, a pair of front legs, a pair of handles, a pair of connecting rod assemblies, a pair of front leg sliding sleeves, a sliding sleeve locking mechanism and a transverse connecting mechanism; the pair of front foot sliding sleeves are respectively sleeved on the pair of front feet and can slide along the front feet; the sliding sleeve locking mechanism is used for locking and unlocking the front foot sliding sleeve; the transverse connecting mechanism comprises an upper cross pipe assembly and a lower cross pipe assembly; because the rider, the front foot and the bottom tube are pivoted with each other, the connecting rod assembly is pivoted between the rider and the bottom tube respectively, and meanwhile, the front foot is provided with the front foot sliding sleeve which can slide along the front foot, so that the folded frame has smaller volume and is convenient to carry and store; in addition, due to the arrangement of the front foot sliding sleeve, when the frame is unfolded, the pivot of the free end of the upper cross pipe assembly is positioned on the front foot, so that the gravity center of the whole vehicle can be regulated, and the stability of the frame is improved.

Description

Frame folding mechanism and baby stroller

Technical Field

The invention relates to the technical field of infant frames, in particular to a frame folding mechanism and an infant stroller provided with the same.

Background

The baby stroller is widely applied to families with infants, and provides great convenience for the outdoor activities of the infants. Generally, the stroller has an unfolded state and a folded state, and when the stroller is not needed to be used, the stroller is folded for storage and carrying.

Most of the existing baby strollers can only be folded longitudinally and cannot be folded transversely, so that the folded baby strollers are still not small enough in volume and inconvenient to carry and store. Some strollers with transverse folding function have a folding mechanism in transverse and longitudinal directions, so that a user must operate both hands simultaneously to fold the stroller, which is inconvenient for the user carrying the infant.

In addition, a few baby carriages which can be folded transversely have poor folding effect and poor stability after being supported, so that the support is not stable enough

Therefore, it is necessary to provide a stroller with a small folding volume, which is convenient to fold and operate, has good structural stability, so as to overcome the above-mentioned problems in the prior art.

Disclosure of Invention

The invention aims to provide a frame folding mechanism which is convenient to fold and has good structural stability.

Another object of the present invention is to provide a stroller that is easy to fold and has good structural stability.

In order to achieve the above-mentioned purpose, the present invention discloses a folding mechanism for a vehicle frame, comprising a pair of bottom tubes, a pair of front legs, a pair of rider, a pair of link assemblies, a pair of front leg sliding sleeves, a sliding sleeve locking mechanism and a transverse connection mechanism; a pair of bottom tubes provide a chassis support structure for the frame; each front foot is correspondingly pivoted with a bottom tube; a pair of drivers are respectively and correspondingly pivoted to the front legs; one end of each connecting rod assembly is pivoted to a vehicle hand, and the other end of each connecting rod assembly is pivoted to a bottom pipe; the pair of front foot sliding sleeves are respectively sleeved on the pair of front feet and can slide along the front feet; the sliding sleeve locking mechanism is used for locking and unlocking the front foot sliding sleeve; the transverse connecting mechanism comprises an upper cross pipe assembly and a lower cross pipe assembly, wherein two ends of the upper cross pipe assembly are respectively pivoted to a pair of connecting rod assemblies and a pair of front foot sliding sleeves, one end of the lower cross pipe assembly is pivoted to one end of a pair of bottom pipes, and the other end of the lower cross pipe assembly is slidingly pivoted to a pair of bottom pipes.

Compared with the prior art, because the vehicle frame folding mechanism is characterized in that the rider, the front foot and the bottom tube are pivoted with each other, the connecting rod assembly is pivoted between the rider and the bottom tube respectively, meanwhile, the front foot is provided with the front foot sliding sleeve which can slide along the front foot, the upper cross tube assembly which can be pivoted by itself is pivoted between the connecting rod assembly and the front foot sliding sleeve, and the lower cross tube assembly which can be pivoted by itself is pivoted between the bottom tubes; therefore, when the bicycle frame is folded, the front foot sliding sleeve can be unlocked, the free end of the upper cross tube assembly is released, the rider, the front foot and the bottom tube are pushed to mutually pivot, so that the longitudinal folding of the bicycle frame is realized, in the process, the free end of the upper cross tube assembly drives the front foot sliding sleeve to slide downwards, the free end of the lower cross tube assembly slides towards the rear end of the bottom tube, and simultaneously, the upper cross tube assembly and the lower cross tube assembly are respectively and automatically pivoted, so that the pair of bottom tubes, the pair of rider and the pair of front foot are respectively driven to be close in opposite directions, the transverse folding of the bicycle frame is realized, the folded bicycle frame has smaller volume, and is convenient to carry and store, and the folding operation is simple and convenient; in addition, due to the arrangement of the front foot sliding sleeve, when the frame is unfolded, the pivot of the free end of the upper cross pipe assembly is positioned on the front foot, so that the gravity center of the whole vehicle can be regulated, and the stability of the frame is improved.

Preferably, the frame folding mechanism further comprises a pair of seat pipes, one seat pipe is pivoted to the front leg and the connecting rod assembly which are connected with each other, and the upper end of the upper cross pipe assembly can be pivoted to the pair of seat pipes.

Preferably, the frame folding mechanism further comprises a frame locking mechanism, wherein the frame locking mechanism is used for locking and unlocking the connection state of the rider and the front foot.

Preferably, the frame locking mechanism comprises a clamping piece slidably arranged in the rider and a frame release locking piece arranged on the rider, one end of the clamping piece is detachably clamped with the front foot, and the other end of the clamping piece is connected with the frame release locking piece.

Preferably, the frame release locking piece comprises a folding pull handle which is sleeved on the handle in a sliding manner and a connecting piece which is arranged in the handle and synchronously slides along with the folding pull handle, and the connecting piece is connected with the clamping piece through a first traction piece.

Preferably, the clamping piece is provided with a sliding groove extending along the length direction of the clamping piece, the rider is fixedly provided with a fixing shaft which transversely penetrates through the sliding groove, an elastic piece is arranged in the sliding groove, one end of the elastic piece is abutted to the fixing shaft, and the other end of the elastic piece is abutted to the bottom wall of the sliding groove.

Preferably, the frame locking mechanism further comprises a first pivoting piece arranged at the upper end of the front foot and a second pivoting piece arranged at the lower end of the rider, wherein a clamping notch corresponding to the clamping piece is formed in the first pivoting piece, the clamping piece is detachably clamped in the clamping notch, and the second pivoting piece is in pivot connection with the first pivoting piece.

Preferably, the sliding sleeve locking mechanism comprises a clamping hole arranged on the front foot sliding sleeve and a clamping block arranged in the front foot, wherein a clamping protrusion matched with the clamping hole is arranged on the clamping block, and the clamping protrusion is detachably clamped with the clamping hole.

Preferably, the sliding sleeve locking mechanism further comprises a supporting seat and a driving sleeve which are arranged in the front foot; a clamping groove for accommodating the clamping block is formed in the supporting seat, and the clamping block can slide in the clamping groove; the driving sleeve is sleeved on the supporting seat, and the clamping block is driven to slide in the clamping groove through the relative sliding of the driving sleeve and the supporting seat, so that the clamping protrusion enters or exits from the clamping hole.

Preferably, first row position slots communicated with the clamping slots are formed in two opposite side walls of the supporting seat, clamping pins clamped in the first row position slots are arranged on the clamping blocks, a pair of inclined slots inclining up and down are formed in two opposite side walls of the driving sleeve, the clamping pins extend out of the first row position slots and then are clamped in the inclined slots, and when the driving sleeve slides up and down relative to the supporting seat, the clamping blocks are driven to slide along the first row position slots through the cooperation of the inclined slots and the clamping pins.

Preferably, the support seat is fixedly arranged, the driving sleeve is arranged in a sliding manner, the sliding sleeve locking mechanism further comprises a folding connecting rod arranged in the front foot, the upper end of the folding connecting rod is connected with the driving sleeve, the lower end of the folding connecting rod is connected with the seat tube through a linkage mechanism, and when the frame is folded, the linkage mechanism drives the folding connecting rod to slide downwards so as to drive the driving sleeve to slide downwards.

Preferably, the front leg is provided with a second row position groove communicated with the front leg, the linkage mechanism comprises a linkage pin and a pushing piece, one end of the linkage pin is connected with the upper end of the folding connecting rod, and the other end of the linkage pin is arranged in the second row position groove in a penetrating way and can slide up and down along the second row position groove; the pushing piece is arranged on the seat tube, a pressing rod which bends towards the linkage pin is arranged on the pushing piece, and when the pushing piece pivots along with the seat tube, the pressing rod downwards pushes the linkage pin.

Preferably, the supporting seat is slidably arranged, the driving sleeve is fixedly arranged, the sliding sleeve locking mechanism further comprises a second traction piece arranged in the front foot, one end of the second traction piece is connected with the supporting seat, and the other end of the traction piece is connected with the first traction piece.

Preferably, a reset piece is further arranged between the supporting seat and the driving sleeve, one end of the reset piece is abutted to the supporting seat, the other end of the reset piece is abutted to the driving sleeve, and the reset piece is used for resetting the relative position of the supporting seat and the driving sleeve.

Preferably, the connecting rod assembly comprises an upper connecting rod and a lower connecting rod, the upper connecting rod bends downwards from the second pivoting piece to extend out, one end of the lower connecting rod is pivoted with the bottom pipe, and the other end of the lower connecting rod is pivoted with the upper connecting rod.

Preferably, the connecting rod assembly further comprises an inclined connecting rod, one end of the inclined connecting rod is pivoted with the pivot points of the lower connecting rod and the upper connecting rod, and the other end of the inclined connecting rod is pivoted with the pivot points of the seat tube and the upper cross tube.

Preferably, the upper cross tube assembly comprises a first cross tube and a second cross tube which are arranged in a crossing way and pivoted mutually, the upper ends of the first cross tube and the second cross tube are respectively pivoted to the pair of connecting rod assemblies or the pair of seat tubes, and the lower ends of the first cross tube and the second cross tube are respectively pivoted to the pair of front foot sliding sleeves.

Preferably, the lower cross tube assembly comprises a third cross tube and a fourth cross tube which are arranged in a crossing way and pivoted with each other, one ends of the third cross tube and the fourth cross tube are respectively pivoted with a pair of bottom tubes, and the other ends of the third cross tube and the fourth cross tube are respectively and slidably connected with a pair of bottom tubes.

Preferably, the frame folding mechanism further comprises a handlebar connecting mechanism pivoted between a pair of handlebar, and a handlebar locking mechanism for locking and unlocking the handlebar connecting mechanism is arranged on the handlebar connecting mechanism.

Preferably, the handle connecting mechanism comprises a pair of handle connecting pieces and a pair of transverse connecting pieces, wherein the handle connecting pieces are respectively connected with the upper ends of a pair of handles, one ends of the transverse connecting pieces are respectively pivoted with the corresponding handle connecting pieces, and the other ends of the transverse connecting pieces are pivoted through the handle locking mechanism.

Preferably, the frame folding mechanism further comprises a pair of sliding rods, wherein the upper ends of the sliding rods are pivoted to the front legs, and the lower ends of the sliding rods are slidingly pivoted to the bottom tubes.

The invention also discloses a baby stroller, which comprises a front wheel, a rear wheel and the frame folding mechanism, wherein one ends of the front legs and the bottom tubes are connected with the front wheel, and the other ends of the bottom tubes are connected with the rear wheel.

Drawings

Fig. 1 is a schematic perspective view of a stroller according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a stroller according to another embodiment of the present invention.

Fig. 3 is a schematic perspective view of a stroller in a semi-collapsed state according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

Fig. 5 is a schematic perspective view of a stroller in a fully collapsed state according to an embodiment of the present invention.

Fig. 6 is a schematic perspective view of a stroller in a fully collapsed state according to an embodiment of the present invention.

Fig. 7 is an exploded view of the rider-to-rider connection mechanism of fig. 1.

Fig. 8 is an exploded view of the rider locking mechanism of fig. 1.

Fig. 9 is a side cross-sectional view of the stroller of fig. 1.

Fig. 10 is an enlarged schematic view of the structure at B in fig. 9.

Fig. 11 is a schematic diagram of a connection structure between a front leg and a locking member of a stroller according to an embodiment of the invention.

Fig. 12 is an exploded view of the connection between the front leg and the rider of the stroller according to an embodiment of the present invention.

Fig. 13 is a schematic perspective view of a folding link of a stroller according to an embodiment of the invention.

Fig. 14 is a schematic view showing the mounting structure of the driving sleeve and the supporting seat of the stroller according to the embodiment of the invention.

Fig. 15 is a schematic perspective view of the support base in fig. 14.

Detailed Description

In order to describe the technical content, structural features, implementation principles and achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.

As shown in fig. 1, 2 and 9, in an embodiment of the stroller 1 disclosed in the present invention, the stroller includes a front wheel 10, a rear wheel 11, and a frame folding mechanism, wherein the frame folding mechanism includes a pair of bottom tubes 12, a pair of front legs 13, a pair of rider 14, a pair of link assemblies 15, and a pair of front leg sliding sleeves 130. The pair of bottom tubes 12 are oppositely arranged at a certain distance and are respectively positioned at two sides of the frame, one end of each bottom tube 12 is connected with a front wheel 10, the other end of each bottom tube 12 is connected with a rear wheel 11, and the pair of bottom tubes 12 provide a chassis supporting structure for the frame. The front legs 13 are respectively arranged at two sides of the frame, the lower end of each front leg 13 and the front end of a corresponding bottom tube 12 are pivoted at a first pivot point P1, the upper end of each front leg 13 inclines towards the rear of the frame, a front leg sliding sleeve 130 capable of sliding up and down along the front leg 13 is sleeved on each front leg 13, a sliding sleeve locking mechanism 3 for locking and unlocking the front leg sliding sleeve 130 is arranged between the front leg sliding sleeve 130 and the front leg 13, when the frame is in an unfolding state, the sliding sleeve locking mechanism 3 locks the front leg sliding sleeve 130 at a fixed position on the front leg 13, and when the frame is to be folded, the sliding sleeve locking mechanism 3 releases the fixed state of the front leg sliding sleeve 130, and at the moment, the front leg sliding sleeve 130 can slide on the front leg 13 freely. Each rider 14 is pivotally connected to the upper end of a corresponding one of the front legs 13 at a second pivot point P2. The link assemblies 15 are respectively disposed on two sides of the frame, the lower end of each link assembly 15 and the bottom tube 12 on the corresponding side are pivotally connected to the third pivot point P3, and the upper end of each link assembly 15 and the front foot 13 on the corresponding side are pivotally connected to the fourth pivot point P4. The frame folding mechanism in this embodiment further includes a transverse connection mechanism, which includes an upper cross tube assembly 17 and a lower cross tube assembly 18, the upper end of the upper cross tube assembly 17 and the link assembly 15 on the corresponding side are pivoted to the fifth pivot point P5, and the lower end of the upper cross tube assembly 17 and the front foot sliding sleeve 130 are pivoted to the sixth pivot point P6. One end of the lower cross tube assembly 18 is pivotally connected to one end of the bottom tube 12 on the corresponding side at a seventh pivot point P7, and the other end of the lower cross tube assembly 18 is slidably pivotally connected to the bottom tube 12.

As shown in fig. 3, the handle 14, the front leg 13 and the bottom tube 12 of the stroller 1 with the above structure are pivoted to each other, and when the stroller is folded, the handle 14, the front leg 13 and the bottom tube 12 are pushed to pivot to each other, so as to realize the longitudinal folding of the stroller frame. In the above-mentioned longitudinal folding process, referring to fig. 5 and 6, the free end of the upper cross tube assembly 17 can be pushed to slide down along the front leg 13, and the free end of the lower cross tube assembly 18 can be pushed to slide backward along the bottom tube 12, so as to drive the pair of bottom tubes 12, the pair of handles 14 and the pair of front legs 13 to close together in opposite directions, thereby realizing the transverse folding of the frame, making the folded frame have smaller volume, convenient for carrying and storage, and simple and convenient folding operation. In this embodiment, due to the arrangement of the front foot sliding sleeve 130, when the frame is unfolded, the pivot point of the free end of the upper cross tube assembly 17 is located on the front foot 13, which is helpful for adjusting the center of gravity of the whole vehicle and improving the stability of the frame.

Referring to fig. 1 and 2 again, in another embodiment of the stroller of the present invention, a pair of seat tubes 16 for supporting seat cloths are further provided, wherein a middle portion of each seat tube 16 is pivotally connected to an eighth pivot point P8 with a front foot 13 on a corresponding side, a rear end of each seat tube 16 is pivotally connected to a ninth pivot point P9 with a link assembly 15 on a corresponding side, and of course, in this embodiment, the upper cross tube assembly 17 is pivotally connected to the seat tube 16 on a corresponding side, that is, the fifth pivot point P5 and the ninth pivot point P9 are both located on the seat tube 16, and the fifth pivot point P5 and the ninth pivot point P9 can be overlapped or separated. In addition, a sliding rod 19 may be disposed between the bottom tube 12 and the front foot 13 on each side of the frame to enhance structural stability, wherein the upper end of the sliding rod 19 is pivotally connected to the front foot 13 at a tenth pivot point P10, and the lower end of the sliding rod 19 is slidably pivotally connected to the bottom tube 12 at an eleventh pivot point P11, i.e. the lower end of the sliding rod 19 is slidably movable back and forth along the bottom tube 12. When the bicycle frame is folded longitudinally, the slide bar 19 pivots along with the front foot 13, so that folding is realized, and when the bicycle frame is unfolded, the slide bar 19 guides partial force born by the front foot 13 to the middle part of the bottom tube 12, so that the stability of the bicycle frame is improved.

With continued reference to fig. 1 and 2, the upper cross tube assembly 17 includes a first cross tube 170 and a second cross tube 171 disposed in a crossed manner and pivoted to each other through a twelfth pivot point P12, the upper ends of the first cross tube 170 and the second cross tube 171 are respectively pivoted to the pair of link assemblies 15 or the pair of seat tubes 16 through a fifth pivot point P5, and the lower ends of the first cross tube 170 and the second cross tube 171 are respectively pivoted to the pair of forefoot sliding sleeves 130 through a sixth pivot point P6. In addition, the lower cross tube assembly 18 includes a third cross tube 180 and a fourth cross tube 181 which are disposed in a crossing manner and are pivoted to each other through a thirteenth pivot point P13, one ends of the third cross tube 180 and the fourth cross tube 181 are respectively pivoted to the pair of bottom tubes 12 through a seventh pivot point P7, the other ends of the third cross tube 180 and the fourth cross tube 181 are respectively pivoted to the pair of bottom tubes 12 in a sliding manner, in this embodiment, a bottom tube sliding sleeve 120 is disposed on the bottom tube 12, one ends of the third cross tube 180 and the fourth cross tube 181 are pivoted to the bottom tube sliding sleeve 120 on the corresponding side, the lower ends of the sliding bars 19 are also pivoted to the bottom tube sliding sleeve 120, and when the frame is folded transversely, the third cross tube 180 and the fourth cross tube 181 slide along the bottom tube 12 through the bottom tube sliding sleeve 120.

In another preferred embodiment of the stroller 1 of the present invention, the stroller further comprises a frame locking mechanism, wherein the frame locking mechanism is used for locking and unlocking the connection state of the rider 14 and the front leg 13, when the frame is unfolded, the frame locking mechanism locks the rider 14 and the front leg 13, and when the frame is folded, the frame locking mechanism is operated to unlock the rider 14 and the front leg 13, and then the rider 14 is pushed to fold the frame. Specifically, as shown in fig. 9 and 11, the handlebar 14 has a hollow tubular structure, and the frame locking mechanism includes a locking member 20 slidably disposed in the handlebar 14, and a frame release locking member disposed on the handlebar 14, where one end of the locking member 20 is detachably locked with the front foot 13, and the other end of the locking member 20 is connected to the frame release locking member. When the frame is unfolded, the clamping piece 20 is clamped on the front foot 13, so that the front foot 13 is limited to pivot, the front foot 13 and the rider 14 are further fixed in an unfolded state, and when the frame is folded, the frame is operated to release the locking piece, and the clamping piece 20 is pulled out of the front foot 13.

As shown in fig. 9, the frame release locking member includes a folding handle 210 slidably sleeved on the handlebar 14 and a connecting member 211 disposed in the handlebar 14 and synchronously sliding along with the folding handle 210, in this embodiment, the connecting member 211 is a hook, and the connecting member 211 is connected with the engaging member 20 through a first traction member 212 (such as a steel wire). The folding handle 210 is sleeved on the rider 14 and can slide up and down along the rider 14, when the frame needs to be folded, the folding handle 210 is pulled upwards, the folding handle 210 drives the connecting piece 211 to move upwards together, and the connecting piece 211 drives the first traction piece 212 to move upwards, so that the clamping piece 20 is separated from the front foot 13, and the rider 14 and the front foot 13 enter a free pivoting state. In this embodiment, the folding handle 210 facilitates the folding of the frame, and has high operability.

As shown in fig. 11, when the frame is unfolded, in order to facilitate the restoration of the engaging member 20, so as to be engaged with the front leg 13, the engaging member 20 is further provided with a restoring mechanism, the restoring mechanism includes a chute 22 extending along the length direction of the engaging member 20, a fixed shaft 23 passing through the chute 22 transversely is fixedly arranged on the rider 14, an elastic member 24 is arranged in the chute 22, one end of the elastic member 24 abuts against the fixed shaft 23, and the other end of the elastic member 24 abuts against the bottom wall of the chute 22. When the folding handle 210 is pulled to fold the frame, the engaging member 20 moves upwards, the elastic member 24 is compressed, and when the folding handle 210 is released, the traction force on the first traction member 212 disappears, and the engaging member 20 moves downwards under the elastic restoring force of the elastic member 24, so as to complete the restoration of the engaging member 20.

As shown in fig. 12, in order to cooperate with the pivoting of the rider 14 and the front leg 13, the frame locking mechanism further includes a first pivoting member 250 disposed at the upper end of the front leg 13 and a second pivoting member 251 disposed at the lower end of the rider 14, a clamping notch 2500 corresponding to the clamping member 20 is formed on the first pivoting member 250, the clamping member 20 is detachably clamped in the clamping notch 2500, the second pivoting member 251 is pivotally connected to the first pivoting member 250, in this embodiment, a clamping slot (not shown) for accommodating the first pivoting member 250 is formed in the second pivoting member 251, and when the frame is folded, the first pivoting member 250 rotates in the clamping slot on the second pivoting member 251. In addition, the second pivot piece 251 is further connected to the connecting rod assembly 15, that is, the connecting rod assembly 15 is driven to rotate along with the rotation of the second pivot piece 251. When the frame is in the unfolded state, the lower end of the clamping piece 20 is clamped in the clamping notch 2500 on the first pivoting piece 250, free pivoting between the first pivoting piece 250 and the second pivoting piece 251 is limited, when the frame is to be folded, the clamping piece 20 moves upwards, and exits from the clamping notch 2500, and the first pivoting piece 250 and the second pivoting piece 251 are in the free rotation state.

In another preferred embodiment of the stroller 1 of the present invention, as shown in fig. 9 and 10, the sliding sleeve locking mechanism 3 includes a clamping hole 30 disposed on the front foot sliding sleeve 130 and a clamping block 31 disposed in the front foot 13, the clamping block 31 is provided with a clamping protrusion 310 adapted to the clamping hole 30, the clamping protrusion 310 and the clamping hole 30 are detachably clamped by moving the clamping block 31 in the front foot 13, and locking and unlocking between the front foot sliding sleeve 130 and the front foot 13 are realized by matching the clamping protrusion 310 and the clamping hole 30. In this embodiment, the front leg 13 has a through hole (not shown) on its wall corresponding to the protrusion 310 of the latch 31, and the protrusion 310 passes through the through hole to enter into and exit from the latch hole 30 of the front leg sliding sleeve 130.

Specifically, referring to fig. 10, 14 and 15, a supporting seat 32 and a driving sleeve 33 are disposed in the front leg 13, a slot 320 for accommodating the clamping block 31 is disposed in the supporting seat 32, the clamping block 31 can slide in the slot 320, the slot 320 is communicated with the clamping hole 30 on the front leg 13, and the clamping block 31 slides transversely in the slot 320 in a direction opposite to the clamping hole 30. The driving sleeve 33 is sleeved on the supporting seat 32, and drives the clamping block 31 to slide in the clamping groove 320 through the relative sliding of the driving sleeve 33 and the supporting seat 32, so that the clamping protrusion 310 enters or exits the clamping hole 30. Preferably, a first row of slots 321 is disposed on two opposite sidewalls of the supporting seat 32 and is communicated with the clamping slot 320, a clamping pin 311 is disposed on the clamping block 31 and is clamped in the first row of slots 321, a pair of inclined slots 330 is disposed on two opposite sidewalls of the driving sleeve 33, the clamping pin 311 extends from the first row of slots 321 and is clamped in the inclined slots 330, and when the driving sleeve 33 slides up and down relative to the supporting seat 32, the clamping block 31 is driven to slide along the first row of slots 321 through the cooperation of the inclined slots 330 and the clamping pins 311. That is, when the driving sleeve 33 moves downward relative to the supporting seat 32, the chute 330 pushes the latch 311 to move away from the latch hole 30, thereby releasing the lock.

The invention discloses two embodiments for driving a driving sleeve.

In embodiment 1, as shown in fig. 9 and 15, the support base 32 is slidably disposed, and the driving sleeve 33 is fixedly disposed. In this embodiment, a second traction member 37 is disposed in the front foot 13, one end of the second traction member 37 is connected to the supporting seat 32, the other end of the second traction member 37 is connected to the first traction member 212, and the first traction member 212 and the second traction member 37 may be formed by one wire or two wires. In the present embodiment, the support 32 is slidable and the driving sleeve 33 is stationary. When the frame is folded, the folding handle 210 is pulled, and simultaneously, the second traction piece 37 is pulled under the traction force of the first traction piece 212, and the second traction piece 37 pulls the supporting seat 32 to slide upwards, so that the driving sleeve 33 slides downwards relative to the supporting seat 32, and the clamping block 31 is driven to withdraw from the clamping hole 30.

In embodiment 2, as shown in fig. 3-4 and fig. 9-15, the supporting seat 32 is fixedly arranged, the driving sleeve 33 is slidably arranged, based on this, a folding connecting rod 34 is arranged in the front foot 13, the lower end of the folding connecting rod 34 is connected with the driving sleeve 33, the upper end of the folding connecting rod 34 is connected with the seat tube 16 through a linkage mechanism, and when the frame is folded, the linkage mechanism drives the folding connecting rod 34 to slide down so as to drive the driving sleeve 33 to slide down. In this manner, the support 32 is stationary and the drive sleeve 33 slides along the support. When the frame is folded, the seat tube 16 pivots and drives the driving sleeve 33 to move downwards through the linkage mechanism, so that the clamping block 31 is withdrawn from the clamping hole 30, and the release of the front foot sliding sleeve 130 is completed. Preferably, the front leg 13 is provided with a second row of positioning slots 35 communicated with the inside of the front leg 13, the second row of positioning slots 35 extend up and down along the front leg 13, the linkage mechanism comprises a linkage pin 360 and a pushing member 361, one end of the linkage pin 360 is connected with the upper end of the folding connecting rod 34, as shown in fig. 13, the linkage pin 360 is connected with the folding connecting rod 34 through a connecting point 360', the other end of the linkage pin 360 penetrates through the second row of positioning slots 35 and can slide up and down along the second row of positioning slots 35, the pushing member 361 is mounted on the seat tube 16, a pressing rod 3610 bent towards the linkage pin 360 is arranged on the pushing member 361, and when the pushing member 361 pivots along with the seat tube 16, the pressing rod 3610 pushes the linkage pin 360 downwards (as shown in fig. 4), and the linkage pin 360 drives the folding connecting rod 34 to move downwards, and the folding connecting rod 34 drives the driving sleeve 33 to move downwards. In this embodiment, when the frame is folded, the folding pull handle 210 is pulled, the first traction member 212 drives the engaging member 20 to disengage from the front leg 13, the rider 14 and the front leg 13 can pivot and fold relatively, and when the rider 14 and the front leg 13 fold relatively, the pushing member 361 fixed on the seat tube 16 pivots along with the seat tube 16, so that the pressing rod 3610 on the pushing member 361 pushes the linking pin 360 downwards, and further the folding connecting rod 34 moves downwards along the front leg 13, and the downward movement of the folding connecting rod 34 causes the chute 330 on the driving sleeve 33 to push the clamping block 31 to disengage from the front leg sliding sleeve 130, thereby releasing and locking the front leg sliding sleeve 130, so as to fold the frame.

When the frame is unfolded, the front foot sliding sleeve 130 is preferably automatically reset to a locking state, so a reset piece 38 is further arranged between the supporting seat 32 and the driving sleeve 33, as shown in fig. 15, one end of the reset piece 38 is abutted against the supporting seat 32, the other end of the reset piece 38 is abutted against the driving sleeve 33, the reset piece 38 is used for resetting the relative position of the supporting seat 32 and the driving sleeve 33, a torsion spring or a spring is selected as the reset piece 38, one end of the spring is abutted against the top wall of the clamping block 31, the other end of the spring is abutted against the top wall of the driving sleeve 33, when the driving sleeve 33 moves downwards relative to the supporting seat 32, the spring is compressed, and after the acting force on the folding connecting rod 34 or the second traction piece 37 disappears, the driving sleeve 33 or the supporting seat 32 is reset under the elastic restoring force of the spring, so that the clamping block 31 is reset into the clamping hole 30, and the front foot sliding sleeve 130 is in a new locking state.

In another preferred embodiment of the stroller 1 of the present invention, referring to fig. 2 and 9, the link assembly 15 includes an upper link 150 and a lower link 151, the upper link 150 is bent downward from the second pivot 251, and in this embodiment, the upper link 150 and the second pivot 251 are integrally formed, i.e. the upper link 150 is pivoted to the front leg 13 through the second pivot 251. The lower end of the lower link 151 is pivoted to the bottom tube 12 through a third pivot point P3, and the upper end of the lower link 151 is pivoted to the upper link 150 through a fourteenth pivot point P14. Further, the link assembly 15 further includes an inclined link 152, wherein one end of the inclined link 152 is pivotally connected to the fourteenth pivot point P14 of the pivot points of the lower link 151 and the upper link 150, and the other end of the inclined link 152 is pivotally connected to the seat tube 16, the fifth pivot point P5 of the pivot point of the upper cross tube, or the ninth pivot point P9. In this embodiment, the provision of the diagonal links 152 further enhances the stability of the frame.

In addition, in order to better match the transverse folding between the two handles 14, as shown in fig. 1, the frame folding mechanism of the present invention further includes a handle connecting mechanism 4 pivotally connected between the pair of handles 14, and a handle locking mechanism 42 for locking and unlocking the handle connecting mechanism 4 is provided on the handle connecting mechanism 4, and after the handle connecting mechanism 4 is unlocked, the handle connecting mechanism 4 can pivot relative to the handle 14, so that the two handles 14 are close to each other to adapt to the transverse folding of the frame. Preferably, the handle connecting mechanism 4 includes a pair of handle connecting members 40 respectively connected to upper ends of the pair of handles 14, and a pair of cross connecting members 41, one ends of the pair of cross connecting members 41 are respectively pivoted to the fifteenth pivot point P15 with the corresponding handle connecting members 40, and the other ends of the pair of cross connecting members 41 are pivoted by a handle locking mechanism 42. In this embodiment, the pair of cross-links 41 straighten out and serve as handles for pushing the frame.

Referring to fig. 7 and 8, referring to the rider locking mechanism 42, the locking mechanism includes a first rotary joint 420, a second rotary joint 421, a positioning member 422, a spring 423, and a lock release button 424. For convenience of description, the pair of transverse connectors 41 in the above embodiment includes the left connector 411 and the right connector 410, wherein the first rotary joint 420 is disposed at one end of the left connector 411 away from the rider connector 40, the first accommodating groove 4200 and the mounting hole 4201 are respectively formed on two sides of the first rotary joint 420, the second rotary joint 421 is disposed at one end of the right connector 410 away from the rider connector 40 and has the second accommodating groove 4210, the first rotary joint 420 and the second rotary joint 421 are pivoted by the pivot shaft 425, the first accommodating groove 4200 and the second accommodating groove 4210 correspond to each other, the positioning member 422 is slidably disposed on the pivot shaft 425 and accommodated in the first accommodating groove 4200 and the second accommodating groove 4210, the spring 423 is abutted between the positioning member 422 and the second rotary joint 421, and the release button 424 is slidably connected to the first rotary joint 420 and accommodated in the mounting hole 4201. When the positioning piece 422 is clamped with the first rotary joint 420 and the second rotary joint 421, the locking mechanism 42 is locked, when the release button 424 is pressed to push the positioning piece 422 to be separated from the first rotary joint 420, the locking mechanism 42 is released, in the process, the spring 423 is compressed, and when the release button 424 is released, the spring 423 is deformed to drive the positioning piece 422 to reset.

As shown in fig. 8, a plurality of positioning teeth 4220 are protruding along the circumferential direction of the positioning member 422, a plurality of positioning grooves (not numbered) corresponding to the positioning teeth 4220 are respectively formed on the inner walls of the first and second accommodating grooves 4200 and 4210, and when the positioning member 422 is in the locking position, the positioning teeth 4220 thereon are engaged in the positioning grooves on the inner walls of the first and second accommodating grooves 4200 and 4210.

The folding and unfolding process of the stroller 1 according to the above embodiment will be described below with reference to fig. 1-15.

1. The folding handle 210 is first pulled upward to pull the engaging member 20 out of the front leg 13 by the first traction member 212, thereby releasing the lock between the rider 14 and the front leg 13. Then, the handle connector 40 is pushed toward the front wheel 10 of the stroller 1, so that the handle 14 rotates downward about the second pivot point P2 and moves toward the front leg 13, and simultaneously drives the front leg 13 Rao Di to rotate downward about a pivot point P1 and move toward the bottom tube 12, thereby pivoting the upper end of the slide bar 19 about the tenth pivot point P10, and pivoting the lower end of the slide bar 19 relative to the bottom tube sliding sleeve 120, and simultaneously pushing the bottom tube sliding sleeve 120 to slide along the bottom tube 12, so that the slide bar 19 gradually approaches the bottom tube 12. In the downward pivoting process of the handlebar 14, the upper link 150 is driven to move, so that the upper link 150, the lower link 151 and the diagonal link 152 pivot around the fourth pivot point P4, the third pivot point P3, the ninth pivot point P9 and the fourteenth pivot point P14, respectively, and the diagonal link 152 further drives the seat tube 16 to pivot around the eighth pivot point P8 and close to the front foot 13. By mutual pivoting of the rider 14, the front legs 13, the slide bars 19, the bottom tube 12, the connecting rod assembly 15 and the seat tube 16, the longitudinal folding of the stroller 1 is realized, after folding, the rider connecting mechanism 4 approaches the front wheels 10, and the rider 14, the front legs 13 and the bottom tube 12 are approximately parallel, as shown in fig. 5.

The handle lock mechanism 42 is released and the handle connecting mechanism 4 is folded. The release button 424 is pressed to push the positioning element 422, when the positioning element 422 is disengaged from the positioning groove of the first rotary joint 420, the first rotary joint 420 and the second rotary joint 421 are pushed to pivot relatively, so that the left connecting element 411 and the right connecting element 410 move downwards and are close to each other, and simultaneously, the pair of handle connecting elements 40 pivot respectively relative to the handle 14 to complete release of the handle 14, so as to prepare for transverse folding of the frame, and the operation can be performed at the beginning of folding the frame or when the longitudinal folding is completed.

2. In the above-mentioned longitudinal folding process of the stroller 1, along with the action of the folding pull handle 210 or the seat tube 16, the folding connecting rod 34 is driven to move downwards, so that the clamping block 31 in the front foot 13 withdraws from the clamping hole 30 on the front foot sliding sleeve 130, the front foot sliding sleeve 130 and the front foot 13 are unlocked, then the lower ends of the first cross tube 170 and the second cross tube 171 are pulled to drive the front foot sliding sleeve 130 to move downwards, and rotate around the sixth pivot point P6 while moving downwards, and further the first cross tube 170 and the second cross tube 171 are further pivoted around the thirteenth pivot point P13 between the first cross tube 170 and the second cross tube 171 to be close together, and simultaneously the front ends of the first cross tube and the second cross tube 171 are pivoted around the fifth pivot point P5 to pull the two bottom tubes 12 and the two front feet 13 to be close together. In the process of mutually closing the two bottom pipes 12, the third cross pipe 180 and the fourth cross pipe 181 pivoted with the two bottom pipes are driven to pivot around a seventh pivot point P7, meanwhile, the third cross pipe 180 and the fourth cross pipe 181 are driven to pivot around a twelfth pivot point P12 between the two bottom pipes, the rear ends of the two bottom pipes rotate around the bottom pipe sliding sleeve 120 and the pair of lower connecting rods 151 are closed, so that the pair of front legs 13 and the pair of handles 14 are pulled to be closed respectively, and the transverse folding of the baby stroller 1 is realized. The folded stroller 1 has a smaller volume, as shown in fig. 6, and is convenient to carry and store.

3. The frame is opened, the rider 14 is pulled to pivot upwards relative to the front feet 13, the rider 14 drives the front feet 13 to move upwards, the front feet 13 drive the slide bars 19 to move and pivot along with the front feet, and the lower ends of the rear slide bars 19 pull the bottom tube sliding sleeve 120 to slide along the bottom tube 12 towards the front wheels 10. In the above process, the bottom tube sliding sleeve 120 slides to push the third cross tube 180 and the fourth cross tube 181 to pivot and unfold each other, so as to push the pair of bottom tubes 12 away from each other to open the stroller 1 laterally, and simultaneously, drive the first cross tube 170 and the second cross tube 171 to pivot and unfold, and drive the front foot sliding sleeve 130 to slide to the locking position after the first cross tube 170 and the second cross tube 171 are unfolded, and restore the locking state with the front foot 13, and then open the rider connecting mechanism 4. When the handle connecting mechanism 4 is opened, the release button 424 is first pressed to release the handle locking mechanism 42, the pair of cross members 41 and the pair of handle connecting members 40 are pulled upward to a substantially horizontal state, and then the release button 424 is released, and the two cross members 41 are in a locked state, thereby opening and fixing the handle connecting mechanism 4 (see fig. 1).

In summary, the stroller 1 of the present invention can pivotally connect the parts forming the frame, such as the rider 14, the front leg 13, the bottom tube 12, the upper cross tube assembly 17 and the lower cross tube assembly 18, so as to facilitate folding of the frame and reduce the space occupied by the folded frame to a minimum; meanwhile, in order to enhance the overall stability and strength of the frame, the upper cross tube assembly 17 is slidably connected with the front foot 13 through the front foot sliding sleeve 130 sliding along the front foot 13, so that the overall stress of the frame is partially guided to the front wheel 10, and the overall stress of the frame is uniform and has high stability.

The foregoing disclosure is merely illustrative of the principles of the present invention, and thus, it is intended that the scope of the invention be limited thereto and not by this disclosure, but by the claims appended hereto.

Claims (22)

1. A frame folding mechanism, comprising:

a pair of bottom tubes providing a chassis support structure for the frame;

a pair of front legs, each of which is correspondingly pivoted to one of the bottom tubes;

a pair of drivers respectively pivoted to the front legs;

the connecting rod assemblies are respectively pivoted with one end of each connecting rod assembly to one front foot and the other end of each connecting rod assembly to one bottom tube;

a pair of front foot sliding sleeves respectively sleeved on the pair of front feet and capable of sliding along the front feet;

the sliding sleeve locking mechanism is used for locking and unlocking the forefoot sliding sleeve;

the transverse connecting mechanism comprises an upper cross pipe assembly and a lower cross pipe assembly, wherein two ends of the upper cross pipe assembly are respectively pivoted to the connecting rod assemblies and the front foot sliding sleeves, one end of the lower cross pipe assembly is pivoted to one end of the bottom pipe, and the other end of the lower cross pipe assembly is slidingly pivoted to the bottom pipe.

2. The frame folding mechanism of claim 1, further comprising a pair of seat tubes, one of said seat tubes being pivotally connected to a connected one of said front legs and one of said link assemblies, respectively, the upper ends of said upper cross tube assemblies being further pivotally connected to a pair of said seat tubes.

3. The frame folding mechanism of claim 2, further comprising a frame locking mechanism for locking and unlocking the connection of the rider to the front foot.

4. A frame folding mechanism according to claim 3, wherein the frame locking mechanism comprises a locking member slidably provided in the rider and a frame release locking member provided on the rider, one end of the locking member is detachably locked with the front foot, and the other end of the locking member is connected with the frame release locking member.

5. The frame folding mechanism according to claim 4, wherein the frame release locking member comprises a folding handle slidably sleeved on the handlebar and a connecting member disposed in the handlebar and synchronously sliding along with the folding handle, and the connecting member is connected with the engaging member through a first traction member.

6. The folding mechanism of claim 4, wherein the engaging member is provided with a sliding slot extending along a length direction of the engaging member, a fixed shaft passing through the sliding slot transversely is fixedly arranged on the handlebar, an elastic member is arranged in the sliding slot, one end of the elastic member is abutted to the fixed shaft, and the other end of the elastic member is abutted to a bottom wall of the sliding slot.

7. The folding mechanism of claim 4, wherein the frame locking mechanism further comprises a first pivoting member disposed at an upper end of the front leg and a second pivoting member disposed at a lower end of the handlebar, the first pivoting member is provided with a clamping notch corresponding to the clamping member, the clamping member is detachably clamped in the clamping notch, and the second pivoting member is pivotally connected to the first pivoting member.

8. The folding mechanism of claim 5, wherein the sliding sleeve locking mechanism comprises a clamping hole formed in the front foot sliding sleeve and a clamping block arranged in the front foot, and a clamping protrusion matched with the clamping hole is arranged on the clamping block and is detachably clamped with the clamping hole.

9. The frame folding mechanism of claim 8, wherein the slide sleeve locking mechanism further comprises a support seat and a drive sleeve disposed within the front foot; a clamping groove for accommodating the clamping block is formed in the supporting seat, and the clamping block can slide in the clamping groove; the driving sleeve is sleeved on the supporting seat, and the clamping block is driven to slide in the clamping groove through the relative sliding of the driving sleeve and the supporting seat, so that the clamping protrusion enters or exits from the clamping hole.

10. The folding mechanism of claim 9, wherein a first row of slots are formed in two opposite side walls of the support base and are communicated with the clamping slots, clamping pins clamped in the first row of slots are arranged on the clamping blocks, a pair of inclined slots inclining up and down are formed in two opposite side walls of the driving sleeve, the clamping pins are clamped in the inclined slots after extending out of the first row of slots, and when the driving sleeve slides up and down relative to the support base, the clamping blocks are driven to slide along the first row of slots through the cooperation of the inclined slots and the clamping pins.

11. The folding mechanism of claim 10, wherein the support base is fixedly arranged, the driving sleeve is slidably arranged, the sliding sleeve locking mechanism further comprises a folding connecting rod arranged in the front leg, the lower end of the folding connecting rod is connected with the driving sleeve, the upper end of the folding connecting rod is connected with the base pipe through a linkage mechanism, and when the frame is folded, the linkage mechanism drives the folding connecting rod to slide downwards so as to drive the driving sleeve to slide downwards.

12. The folding mechanism of claim 11, wherein the front leg is provided with a second row slot communicated with the inside of the front leg, the linkage mechanism comprises a linkage pin and a pushing piece, one end of the linkage pin is connected with the upper end of the folding connecting rod, and the other end of the linkage pin is arranged in the second row slot in a penetrating way and can slide up and down along the second row slot; the pushing piece is arranged on the seat tube, a pressing rod which bends towards the linkage pin is arranged on the pushing piece, and when the pushing piece pivots along with the seat tube, the pressing rod downwards pushes the linkage pin.

13. The frame folding mechanism of claim 10, wherein the support base is slidably disposed, the driving sleeve is fixedly disposed, the sliding sleeve locking mechanism further comprises a second traction member disposed in the front leg, one end of the second traction member is connected to the support base, and the other end of the traction member is connected to the first traction member.

14. The frame folding mechanism according to claim 10, wherein a restoring member is further disposed between the support base and the driving sleeve, one end of the restoring member is abutted to the support base, the other end of the restoring member is abutted to the driving sleeve, and the restoring member is used for restoring the relative position of the support base and the driving sleeve.

15. The frame folding mechanism of claim 7, wherein the link assembly includes an upper link and a lower link, the upper link being bent downward from the second pivot member, one end of the lower link being pivotally connected to the bottom tube, and the other end of the lower link being pivotally connected to the upper link.

16. The frame folding mechanism of claim 15, wherein the link assembly further comprises an inclined link, one end of the inclined link is pivotally connected to the pivot points of the lower link and the upper link, and the other end of the inclined link is pivotally connected to the pivot points of the seat tube and the upper cross tube.

17. The frame folding mechanism according to claim 2, wherein the upper cross tube assembly comprises a first cross tube and a second cross tube which are arranged in a crossing manner and pivoted to each other, upper ends of the first cross tube and the second cross tube are respectively pivoted to the pair of connecting rod assemblies or the pair of seat tubes, and lower ends of the first cross tube and the second cross tube are respectively pivoted to the pair of front foot sliding sleeves.

18. The frame folding mechanism according to claim 1, wherein the lower cross tube assembly comprises a third cross tube and a fourth cross tube which are arranged in a crossing manner and pivoted with each other, one ends of the third cross tube and the fourth cross tube are respectively pivoted with a pair of bottom tubes, and the other ends of the third cross tube and the fourth cross tube are respectively connected with a pair of bottom tubes in a sliding manner.

19. The frame folding mechanism of claim 1, further comprising a handle connecting mechanism pivotally connected between a pair of said handles, said handle connecting mechanism having a handle lock mechanism for locking and unlocking the handle connecting mechanism.

20. The frame folding mechanism according to claim 19, wherein the rider connecting mechanism includes a pair of rider connecting members respectively connected to upper ends of a pair of the rider and a pair of transverse connecting members, one ends of the pair of transverse connecting members are respectively pivoted to the corresponding rider connecting members, and the other ends of the pair of transverse connecting members are pivoted by the rider locking mechanism.

21. The frame folding mechanism of claim 1, further comprising a pair of slide bars, an upper end of the slide bars being pivotally connected to the front legs, and a lower end of the slide bars being slidably pivotally connected to the bottom tube.

22. A stroller comprising a front wheel, a rear wheel and a frame folding mechanism according to any one of claims 1 to 21, wherein one end of the front foot and the bottom tube is connected to the front wheel and the other end of the bottom tube is connected to the rear wheel.

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