CN212738251U - Children's shallow frame and children's shallow - Google Patents

Abstract

The utility model discloses a children's shallow frame and children's shallow. The frame of the children stroller comprises a handle group, a handle assembly and a seat fixing seat, wherein the seat fixing seat is arranged at the lower end of the handle assembly; a forefoot group including a forefoot joint; a hindfoot group comprising a hindfoot joint; the first locking device is arranged between the seat fixing seat and the front foot joint and enables the front foot joint to be locked with the seat fixing seat; and the second locking device is arranged between the rear foot joint and the seat fixing seat as well as between the rear foot joint and the front foot joint and locks the rear foot joint with the seat fixing seat as well as between the rear foot joint and the front foot joint, and the handle group is telescopically arranged to unlock the first locking device and the second locking device. The utility model discloses a children's shallow frame includes the two-stage locking, is first locking device and second locking device respectively for the security of children's shallow frame locking when expansion state is higher, does benefit to the safety of taking of guaranteeing children. And the utility model discloses a children's shallow frame utilizes the flexible synchronous realization two-stage unblock of hand (hold) group, easy operation.

Description

Children's shallow frame and children's shallow

Technical Field

The utility model relates to a children's shallow technical field, in particular to children's shallow frame and children's shallow.

Background

Most families can utilize the children's cart to carry children at present to save physical power. Most existing stroller vehicles are collapsible for convenient carrying and storage. When the stroller is in the unfolded state, i.e., when a child needs to be carried, it is required to ensure that the folding joint of the stroller is in the locked state to ensure the riding safety of the child. However, the folding joints of many existing child strollers are easy to unlock under the condition of mistaken collision, and the safety is insufficient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a children's shallow frame and children's shallow to improve children's shallow's security.

The utility model discloses the first aspect provides a children's shallow frame, include:

the handle group comprises a handle component and a seat fixing seat arranged at the lower end of the handle component;

a forefoot group including a forefoot joint;

a hindfoot group comprising a hindfoot joint;

the first locking device is arranged between the seat fixing seat and the front foot joint and enables the front foot joint to be locked with the seat fixing seat; and

the second locking device is arranged between the rear foot joint and the seat fixing seat as well as between the rear foot joint and the front foot joint and locks the rear foot joint with the seat fixing seat as well as the front foot joint, and the handle group is telescopically arranged to unlock the first locking device and the second locking device.

In some embodiments, the seat holder has a handle slot, the front foot joint has a front foot slot, the first locking device includes a handle slider slidably disposed in the handle slot and a front foot slider slidably disposed in the front foot slot, when the stroller frame is in the unfolded state, the handle slot and the front foot slot are in the same direction, and the front foot slider extends into the handle slot and abuts against the handle slider.

In some embodiments, the handle slider has a first elongated hole, the length direction of the first elongated hole is the same as the extending direction of the handle groove, the seat fixing base is provided with a first connecting piece which is arranged in the first elongated hole in a penetrating way and is connected with the seat fixing base and the rear foot joint, the front foot slider has a second elongated hole, and the front foot joint is provided with a second connecting piece which is arranged in the second elongated hole in a penetrating way and is connected with the front foot joint and the rear foot joint.

In some embodiments, the lower end of the front foot slider is provided with an open slot, and the front foot set further comprises a third connector arranged on the front foot joint and a spring arranged between the third connector and the slot bottom of the open slot.

In some embodiments, the length direction of the second elongated hole is the same as the extending direction of the forefoot slot.

In some embodiments, a first clamping groove is formed in the seat fixing seat, a second clamping groove is formed in the front foot joint, the second locking device comprises a locking stop block, a first clamping pin and a second clamping pin which are respectively arranged on two sides of the locking stop block, and a stop block base fixedly arranged on the rear foot joint, the first clamping pin is clamped with the first clamping groove, the second clamping pin is clamped with the second clamping groove, and the locking stop block is movably arranged relative to the stop block base.

In some embodiments, the hindfoot joint is provided with two elongated holes corresponding to the first and second detents, and the first and second detents move along the elongated holes when the locking dog moves relative to the dog base.

In some embodiments, the stroller frame further comprises an unlocking assembly, the unlocking assembly comprises a boss arranged on one side, close to the rear foot joint, of the front foot sliding block and an unlocking top block rotatably connected to the rear foot joint, the unlocking top block is abutted to the top end of the locking stop block, and in the sliding process of the front foot sliding block, the boss pushes the unlocking top block to rotate so as to drive the locking stop block to move.

In some embodiments, the length direction of the second elongated hole is inclined towards the obliquely lower direction relative to the extending direction of the forefoot slot, an arc-shaped hole is formed in the forefoot joint, the second elongated hole and the arc-shaped hole are arranged in a crossed mode, and the second connecting piece is arranged in the arc-shaped hole and the second elongated hole in a penetrating mode.

In some embodiments, the second locking device includes a fourth connector and a first connecting plate connecting the second connector and the fourth connector, the fourth connector is disposed on the seat holder and connected to the rear foot joint, and when the first locking device locks the front foot joint and the seat holder, the second connector abuts against the bottom end of the second elongated hole and is located below a connecting line of the fourth connector and the third connector; when the first locking device is unlocked, the second connecting piece is abutted against the top end of the second elongated hole and is positioned above the connecting line of the fourth connecting piece and the third connecting piece.

In some embodiments, the distance between the second connector and the fourth connector is twice the radius of the centerline of the arcuate aperture.

In some embodiments, the second locking device further includes a second connecting strap connecting the forefoot joint and the rearfoot joint, the first connecting strap, the forefoot joint, the second connecting strap, and the rearfoot joint collectively forming a four-bar linkage.

In some embodiments, the first end of the second connecting piece is provided with an elongated hole and is connected with the seat fixing seat and the rear foot joint through a fifth connecting piece inserted in the elongated hole, and the second end of the second connecting piece is connected with the front foot joint.

In some embodiments, the handle assembly includes a handle extension tube, a handle end plug and a handle sleeve, the handle end plug is disposed at a lower end of the handle extension tube and moves downward with the handle extension tube relative to the handle sleeve, and the handle end plug pushes the handle slide block to move downward to unlock the first locking device.

In some embodiments, the handle assembly further comprises a handle, a handle cord connected to the handle, and a button, wherein a first end of the handle cord is provided with a connector connected to the button, a second end of the handle cord is provided with a locking block, a locking groove is provided on the handle sleeve, and the button is rotatably disposed relative to the handle to drive the handle cord to move so that the locking block enters or leaves the locking groove.

In some embodiments, the handle sleeve is provided with a plurality of stopping grooves arranged at intervals in the length direction of the handle sleeve, and the stopping block can selectively enter one of the plurality of stopping grooves to realize stopping.

The utility model discloses the second aspect provides a children's shallow, include the utility model discloses the children's shallow frame that the first aspect provided.

Based on the technical scheme of the utility model, the frame of the children cart comprises a handle group, a handle component and a seat fixing seat arranged at the lower end of the handle component; a forefoot group including a forefoot joint; a hindfoot group comprising a hindfoot joint; the first locking device is arranged between the seat fixing seat and the front foot joint and enables the front foot joint to be locked with the seat fixing seat; and the second locking device is arranged between the rear foot joint and the seat fixing seat as well as between the rear foot joint and the front foot joint and locks the rear foot joint with the seat fixing seat as well as between the rear foot joint and the front foot joint, and the handle group is telescopically arranged to unlock the first locking device and the second locking device. The utility model discloses a children's shallow frame includes the two-stage locking, is first locking device and second locking device respectively to make children's shallow frame the security of locking when expansion state higher, do benefit to the security of taking of guaranteeing children. And the utility model discloses a children's shallow frame utilizes the flexible synchronous realization two-stage unblock of hand (hold) group, easy operation.

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

Drawings

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

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

FIG. 2 is a schematic view of the stroller frame of FIG. 1 in an unfolded configuration;

FIG. 3 is a schematic structural view of the stroller frame of FIG. 1 in a process of folding;

fig. 4 is a schematic structural view of the stroller frame shown in fig. 1 in a folded state;

FIG. 5 is a schematic view of the stroller frame shown in FIG. 2 in a disassembled configuration;

FIG. 6 is an exploded view of the stroller frame of FIG. 2;

FIG. 7 is a schematic view of the handle set of the stroller frame of FIG. 2 during telescoping;

FIG. 8 is an exploded view of the handlebar assembly of FIG. 2;

FIG. 9 is a schematic view of the connection of the first end of the handle cord;

FIGS. 10 and 11 are schematic views of the connection structure of the second end of the handle cord in the locked state and the unlocked state;

fig. 12 is a schematic structural view of the folding joint of the stroller frame shown in fig. 2 in an unfolded state;

fig. 13 is a schematic structural view of a folding joint when the stroller frame shown in fig. 2 is switched from an unfolded state to a folded state;

fig. 14 is a schematic structural view of the folding joint of the stroller frame shown in fig. 2 in a folded state;

fig. 15 is an exploded view of a stroller frame according to another embodiment of the present invention;

fig. 16 is a schematic structural view of the folding joint of the stroller frame shown in fig. 15 in an unfolded state;

FIG. 17 is a schematic diagram of the front foot slider of FIG. 15;

FIG. 18 is a schematic view of the forefoot slider of FIG. 15 sliding to the bottom end;

FIG. 19 is a schematic diagram of the forefoot slider of FIG. 15 sliding to the top end;

fig. 20 is a schematic structural view of the folding joint of the stroller frame shown in fig. 15 in a folded state.

Detailed Description

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

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

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

As shown in fig. 1 to 20, the stroller frame of the embodiment of the present invention comprises:

the handlebar group 1 comprises a handlebar assembly and a seat fixing seat 22 arranged at the lower end of the handlebar assembly;

an forefoot group 2 including a forefoot joint 28;

a hindfoot group 3 including a hindfoot joint 32;

a first locking device which is arranged between the seat fixing seat 22 and the front foot joint 28 and locks the front foot joint 28 and the seat fixing seat 22; and

and a second locking device which is arranged between the rear foot joint 32 and the seat fixing seat 22 and the front foot joint 28 and locks the rear foot joint 32 with the seat fixing seat 22 and the front foot joint 28, wherein the handle group is telescopically arranged to unlock the first locking device and the second locking device.

The utility model discloses children's shallow frame includes the two-stage locking, is first locking device and second locking device respectively to make children's shallow frame the security of locking when expansion state higher, do benefit to the safety of taking of guaranteeing children. And the utility model discloses a children's shallow frame utilizes the flexible synchronous realization two-stage unblock of hand (hold) group, easy operation.

Specifically, in the present embodiment, as shown in fig. 12, the seat fixing seat 22 has a handle groove, the front leg joint 28 has a front leg groove, the first locking device includes a handle slider 21 slidably disposed in the handle groove and a front leg slider 24 slidably disposed in the front leg groove, when the stroller frame is in the unfolded state, the handle groove and the front leg groove are in the same direction, that is, the handle groove and the front leg groove are in the same straight line, and the front leg slider 24 extends into the handle groove and abuts against the handle slider 21.

The handle slider 21 of the present embodiment has a first elongated hole, the length direction of the first elongated hole is the same as the extending direction of the handle groove, the seat fixing base 22 is provided with a first connecting member 19 penetrating through the first elongated hole and connecting the seat fixing base 22 and the rear foot joint 32, the front foot slider 24 has a second elongated hole, and the front foot joint 28 is provided with a second connecting member 39 penetrating through the second elongated hole and connecting the front foot joint 28 and the rear foot joint 32.

As shown in fig. 12, the lower end of the front foot slider 24 of the present embodiment is provided with an open slot, and the front foot set 2 further includes a third coupling 31 disposed on the front foot joint 28 and a spring 25 disposed between the third coupling 31 and the bottom of the open slot. When the frame is in the unfolding state, the elastic force of the spring 25 pushes the front foot slide block 24 to the top end and penetrates out of the front foot joint 28 to enter the handle groove of the seat fixing seat 22 so as to complete the first locking.

The length direction of the second elongated hole of the present embodiment is the same as the extending direction of the forefoot groove.

As shown in fig. 12 and 13, the seat fixing seat 22 of this embodiment is provided with a first engaging groove 22A, the front leg joint 28 is provided with a second engaging groove 28A, the second locking device includes a locking stopper 37, a first engaging pin 33A and a second engaging pin 33B respectively disposed on two sides of the locking stopper 37, and a stopper base 36 fixedly disposed on the rear leg joint 32, the first engaging pin 33A is engaged with the first engaging groove 22A, and the second engaging pin 33B is engaged with the second engaging groove 28A, thereby achieving the second locking. The locking dog 37 is movably arranged with respect to the dog seat 36.

The hindfoot joint 32 of this embodiment is provided with two elongated holes corresponding to the first and second detents 33A, 33B, and the first and second detents 33A, 33B move along the elongated holes, respectively, when the locking dog 37 moves relative to the dog mount 36.

The stroller frame of this embodiment further comprises an unlocking assembly. The unlocking assembly comprises a boss 24A arranged on one side, close to the rear foot joint 32, of the front foot slide block 24 and an unlocking ejector block 26 rotatably connected to the rear foot joint 32, the unlocking ejector block 26 is abutted to the top end of the locking stop block 37, and in the sliding process of the front foot slide block 24, the boss 24A pushes the unlocking ejector block 26 to rotate so as to drive the locking stop block 37 to move. The unlocking top block 26 moves to drive the two clamping pins to leave the corresponding clamping grooves respectively, so that unlocking is completed.

As shown in fig. 7 to 11, the handle assembly of this embodiment includes a handle extension tube 11, a handle end plug 16 and a handle sleeve 18, the handle end plug 16 is disposed at the lower end of the handle extension tube 11 and moves downward with the handle extension tube 11 relative to the handle sleeve 18, and the handle end plug 16 pushes the handle slide block 21 to move downward to unlock the first locking device.

The handle assembly of this embodiment further includes the hand (hold), the hand (hold) stay cord 12 and the button 10 that are connected with the hand (hold), the first end of hand (hold) stay cord 12 is provided with the connector 121 who is connected with the button 10, the second end of hand (hold) stay cord 12 is provided with and blocks piece 122, be provided with on the hand (hold) sleeve 18 and block the groove, the button 10 rotationally sets up for the hand (hold) so that drive hand (hold) stay cord 12 and move and then make and block piece 122 get into.

The handle bushing 18 of the present embodiment is provided with a plurality of locking grooves provided at intervals in the longitudinal direction of the handle bushing 18, and the locking piece 122 can be selectively inserted into one of the plurality of locking grooves to be locked.

In another embodiment, as shown in fig. 16 to 20, the length direction of the second elongated hole 241 is inclined obliquely downward with respect to the extending direction of the forefoot slot, an arc-shaped hole 28A is provided on the forefoot joint 28, the second elongated hole 241 and the arc-shaped hole 28A are arranged in a crossing manner, and the second connector 39 is inserted into the arc-shaped hole 28A and the second elongated hole 241.

The second locking means of the present embodiment includes a fourth link 40 and a first link piece 38 connecting the second link 39 and the fourth link 40. The fourth connecting element 40 is disposed on the seat holder 22 and connected to the rear leg joint 32, and when the first locking device locks the front leg joint 28 and the seat holder 22, the second connecting element 39 abuts against the bottom end of the second elongated hole and is located below a connecting line between the fourth connecting element 40 and the third connecting element 31; when the first locking device is unlocked, the second connecting member 39 abuts against the top end of the second elongated hole 241 and is located above the line connecting the fourth connecting member 40 and the third connecting member 31.

The distance between the second connector 39 and the fourth connector 40 of the present embodiment is twice the radius of the center line of the arcuate hole 28A.

The second locking device of this embodiment further includes a second connecting link 43 that connects the forefoot joint 28 and the rearfoot joint 32, and the first connecting link 38, the forefoot joint 28, the second connecting link 43, and the rearfoot joint 32 together form a four-bar linkage.

The structure and the folding process of the stroller frame of the present embodiment will be described in detail below.

As shown in fig. 1 to 4, a stroller frame 100 according to an embodiment of the present invention includes a handlebar assembly 1, a front leg assembly 2, a rear leg assembly 3, a seat, a backrest, and the like. The stroller frame 100 is in an unfolded state as shown in fig. 1 and 2, the stroller frame 100 is in a folded state as shown in fig. 3, and the stroller frame is in a folded state as shown in fig. 4.

As shown in fig. 5 and 6, the stroller frame of the present embodiment includes a handlebar assembly 1, a front leg assembly 2 and a rear leg assembly 3. Forefoot set 2 includes a forefoot joint 28 and rearfoot set 3 includes a rearfoot joint 32.

As shown in fig. 7, the handle set 1 is telescopically arranged.

As shown in fig. 8, the handle set 1 includes a handle, a button assembly, a handle extension tube 11, a handle sleeve 18, a handle pull rope 12, a handle upper cover 4, a handle lower cover 5, a handle end cover 7, a handle pull rope 12, a locking pin 13, a limiting plastic 14 and a handle end plug 16.

The handle is fixedly connected with the end part of the handle extension tube 11 and comprises a handle upper cover 4, a handle lower cover 5, a handle end cover 7 and a handle decorative cover 9. The button assembly comprises a button seat 9 and a button 10, wherein the button seat 9 is fixedly connected to the handle, and the button 10 can rotate relative to the button seat 9. The bayonet 13, the handle end plug 16 and the limiting plastic 14 are fixed at one end of the handle extension tube 11 and are assembled in the handle sleeve 18, and the handle sliding sleeve 17 is fixed at the end of the handle sleeve 18 and blocks the limiting plastic 14.

As shown in fig. 9 to 11, a first end of the handle cord 12 is provided with a connector 121, the connector 121 is connected to the button 10, a second end of the handle cord 12 is provided with a locking block 122, and the locking block 122 is fitted into a groove of the handle end plug 16.

In the natural state, as shown in fig. 10, the locking piece 122 partially protrudes from the notch of the handle end plug 16 under the action of the handle retractable bayonet spring 15 and is fitted into the locking groove of the handle sleeve 18.

The user applies force to the push button 10 to rotate it relative to the button base 9, thereby moving the cord section of the handle cord 12 in the direction of rotation of the push button 10. In the process, as shown in fig. 11, the locking block 122 of the handle pull rope 12 overcomes the elastic force of the handle telescopic bayonet spring 15 under the pulling force of the pull rope section and is completely retracted into the groove of the handle end plug 16, at this time, the locking between the handle telescopic pipe 11 and the handle sleeve 18 is released, and the handle is applied with downward force so that the handle telescopic pipe 11 can freely slide in a limited range in the handle sleeve 18. When the user releases the handle, the clamping block 122 of the handle pull rope 12 extends out of the notch of the handle end plug 16 under the elastic force of the handle telescopic bayonet spring 15 and is embedded into other clamping grooves of the handle sleeve 18, so that the up-and-down adjustment of the handle is realized.

As shown in fig. 7, the handle sleeve 18 of the present embodiment is provided with a plurality of locking grooves so that the handle set 1 can be used in a plurality of lengths.

As shown in fig. 2 and 12, when the frame is in the unfolded state, the pipe of the front foot set 2 is in the same line with the pipe of the handlebar set 1.

The handle slider 21 is embedded in the handle groove of the seat fixing seat 22, the first connecting piece 19 is fixed on the seat fixing seat 22 and penetrates through the first long hole of the handle slider 21, so that the handle slider 21 can move in the range taking the length of the first long hole as the stroke under the action of external force, and meanwhile, the first connecting piece 19 connects the rear foot joint 32 with the seat fixing seat 22 to form a peripheral fit. That is, the rear foot joint 32 and the seat holder 22 can rotate about the first link 19.

The front foot slide block 24 in the front foot group 2 is embedded in the groove through hole of the front foot joint 28. The second connecting piece 39 is fixed on the front foot joint 28 and is arranged in the second long hole of the front foot slider 24 in a penetrating way, so that the front foot slider 24 can move in a range taking the length of the second long hole as a stroke under the action of external force. The joint bayonet spring 25 is a spring part, one end of the joint bayonet spring is propped against the front foot sliding block 24, the other end of the joint bayonet spring is propped against the third connecting piece 31, and the third connecting piece 31 is fixed on the front foot joint 28 and the rear foot joint 32 to ensure that the front foot joint 28 and the rear foot joint 32 are in circumferential fit.

As shown in figure 12, when the frame is in the unfolded state, the front foot slider 24 is always at the uppermost end of the stroke, namely partially extending out of the front foot joint 28, under the action of the elastic force of the joint bayonet spring 25. At this time, the front foot slider 24 contacts the handle slider 21 and pushes the handle slider 21 to the uppermost end of the stroke, and the part of the front foot slider 24 extending out of the front foot joint 28 is embedded into the handle groove of the seat fixing seat 22 to realize the first locking.

The unlocking top block 26 is fixed on a rear foot joint 32 through a bolt 30, the unlocking top block 26 is rotatably arranged around the bolt 30, a torsion spring 29 is assembled on the unlocking top block 26, and a force arm abuts against a front foot joint 28. The torsion spring 29 keeps the unlocking cam 26 in contact with the front foot slider 24.

As shown in FIG. 12, the first and second locking pins 33A and 33B pass through the locking stop 37 and the first locking pin 33A is constrained within the elongated hole of the rear knuckle 32 to slide up and down under external forces, and similarly, the second locking pin 33B is constrained within the elongated hole of the rear knuckle 32 to slide up and down under external forces.

The stopper base 36 is fixed on the rear foot joint 32, the stopper spring 23 is a spring part, one end of which abuts against the stopper base 36, and the other end of which abuts against the locking stopper 37, and always gives an upward force to the locking stopper 37. When the frame is unfolded, the front foot slider 24 is embedded into the seat fixing seat 22, the locking stop 37 slides to the topmost end together with the first clamping pin 33A and the second clamping pin 33B under the elastic force of the stop spring 23, and at the moment, the two clamping pins 33A and 33B passing through the locking stop 37 are clamped in the seat fixing seat 22 and the clamping grooves of the front foot joint group 28. The unlocking trend of clockwise rotation of the handlebar set 1 by taking the first connecting piece 19 as a center and anticlockwise rotation of the front foot set 2 by taking the third connecting piece 31 as a center is blocked, so that the second locking is realized.

When the frame is unfolded and is in a free state and the handle is not driven by external force to unlock, the first locking device and the second locking device can be automatically locked at the same time, so that the stability of the vehicle platform is ensured and unhooking is prevented.

When the handle is adjusted to the lowest gear, the handle is continuously adjusted to slide downwards, as shown in fig. 13, the handle end plug 16 pushes the handle slide block 21, the handle slide block 21 pushes the front foot slide block 24 to slide downwards to the bottom of the maximum stroke against the elastic force of the joint bayonet spring 25, at this time, the part of the front foot slide block 24 extending out of the front foot joint 28 is completely withdrawn from the handle groove of the seat fixing seat 22, and the first locking is unlocked.

During the movement of the front foot slider 24, the boss 24A on the front foot slider 24 pushes the unlocking top block 26 to overcome the elasticity of the torsion spring 29 and rotate clockwise. The unlocking top block 26 pulls the locking stop block 37 to overcome the elastic force of the stop block base 36 to slide downwards in the rotating process, and the bayonet pins 33A and 33B connected to the locking stop block 37 slide downwards along with the locking stop block 37 until the front foot joint 28 and the bayonet slot of the seat fixing seat 22 are withdrawn, so that secondary locking and unlocking are realized.

After the two-stage locking of the frame is completely unlocked, as shown in fig. 14, the handle is pressed downward, and the seat holder 22 is rotated clockwise around the first connecting member 19, that is, the handle set 1 is rotated clockwise. The first end of the first connecting piece 38 is rotatably connected to the seat holder 22 by the fourth connector 40, and the second end of the first connecting piece 38 is fixed to the front foot joint 28 by the second connector 39. During the clockwise rotation of handlebar assembly 1, first link 38 will impart an upward force to second link 39, causing forefoot joint 28 to rotate counterclockwise about third link 31.

The downward force is continuously applied to the handle until the folding of the vehicle platform is completed.

In another embodiment, as shown in fig. 15-20, the forefoot slider 24 fits into the forefoot channel of the forefoot group 2.

Unlike the previous embodiment, the front foot slider 24 of the present embodiment has the second elongated hole 241, and the longitudinal direction of the second elongated hole 241 is inclined obliquely downward with respect to the extending direction of the front foot groove, as shown in fig. 17. And the forefoot joint 28 is also provided with an arc-shaped hole 28A. The second elongated hole 241 intersects the arc-shaped hole 28A, and the second coupling piece 39 passes through the second elongated hole 241 of the forefoot slider 24 and the arc-shaped hole 28A of the forefoot knuckle 28 and connects the forefoot slider 24 and the forefoot knuckle 28 together. The forefoot slider 24 slides within the forefoot channel of the forefoot joint 28 with limited travel. The third connector 31 is fixed on the front foot joint 28, and the joint clamping pin spring 25 is arranged in the front foot joint 28, one end of the joint clamping pin spring is abutted against the front foot slide block 24, and the other end of the joint clamping pin spring is abutted against the third connector 31. The forefoot slider 24 is subjected to the spring force imparted by the articulation detent spring 25 at any position during its slidable travel.

The handle slider 21 is embedded in a handle groove of the seat fixing seat 22, and the first connecting member 19 passes through the first elongated hole of the handle slider 21 and connects the handle slider 21 with the seat fixing seat 22. The handle slide 21 is freely slidable in a handle groove of the seat holder 22 within a fixed stroke.

When the frame is in a spreading state, the handlebar group 1 and the front foot group 2 are in the same straight line. The handle group 1 is aligned with the groove of the front foot group 2, and the front foot slider 24 partially enters the groove through hole of the seat fixing seat 22 under the elastic force of the joint bayonet spring 25 to realize the first locking.

During the sliding process, as shown in fig. 16, the intersection formed by the staggered arc-shaped holes of the front foot slider 24 and the front foot set 2 rotationally moves with the fourth connector 40 as the center until the front foot slider 24 slides to the end of the stroke. During the rotation of the intersection, the second link 39 passing through the intersection moves rotationally with the intersection centered on the fourth link 40. And eventually to the lower most ends of the arcuate apertures of the forefoot slider 24 and forefoot knuckle 28.

The first connecting piece 38 is connected at a first end thereof to the fourth connecting member 40 and at the other end thereof to the second connecting member 39. At this time, the first connecting piece 38 has already passed the dead point where the handle set 1 takes the fourth connecting piece 40 as the axis and the front leg set 2 freely rotates with the third connecting piece 31 as the axis, when the second connecting piece 39 passes the line, when the handle bears downward pressure, the seat fixing base 22 has a tendency to rotate with the first connecting piece 19 as the center, the tendency will apply a force pointing to the lower part of the third connecting piece 31 through the fourth connecting piece 40 fixed on the seat fixing base 22, and just prevent the front leg set 2 from rotating counterclockwise with the center of the third connecting piece 31 to unlock, so as to achieve the effect of strengthening the abnormal unlocking joint locking. Therefore, the second locking is realized, and the locking structure is in a state that the locking structure cannot be unhooked without using a normal unlocking mode under a non-destructive condition.

The handle is continuously adjusted downwards to the end, the handle end plug 16 is contacted with the handle sliding block 21 and pushes the handle sliding block 21, so that the handle sliding block 21 pushes the front foot sliding block 24 to slide downwards against the elasticity of the joint clamping pin spring 25 until the stroke of the front foot sliding block 24 is finished, at the moment, the front foot sliding block 24 completely exits from a handle groove of the seat fixing seat 22, and the first locking and unlocking are realized.

As shown in fig. 20, during the downward sliding process of the forefoot slider 24, the second link 39 rotates around the fourth link 40 to the top of the arc-shaped holes of the forefoot slider 24 and the forefoot knuckle 28 along with the intersection of the forefoot slider 24 and the forefoot set 2. The first connecting piece 38 connected with the second connecting piece 39 passes through the rotation dead point of the handle group 1 and the front leg group 2, and the second locking and unlocking are realized.

When downward pressure is applied to the handle, the handle set 1 starts to rotate clockwise around the fourth connecting piece 40, and the fourth connecting piece 40 fixed on the handle set 1 gives a force to the first connecting piece 38 along the length direction of the first connecting piece 38, and the force pushes the forefoot joint 28 to rotate anticlockwise around the third connecting piece 31.

The handle set 1 rotates counterclockwise, and the seat fixing seat 22 on the handle set 1 rotates counterclockwise around the first connecting member 19 as a center. The fifth connecting member 42 is fixed to the seat holder 22 through the elongated hole of the second connecting piece 43. The fifth connecting member 42 may be a fixing pin. The other end of the second connecting piece 43 is connected to the front foot knuckle 28 by a part identical to the fifth connecting piece 42. During the counterclockwise rotation of the seat holder 22, the fifth link 42 fixed to the seat holder 22 pulls the second link 43, and the second link 43 is dragged by the fifth link 42 and gives the handle bar assembly 2a force along the second link 43, which varies with the rotation of the second link 43. The handle group 1 rotates anticlockwise under the influence of the force, when the handle group 1 and the front foot group 3 rotate to the same straight line, two locking steps are realized, and the vehicle platform is unfolded.

In the process of unfolding the frame, the second connecting piece 43 not only plays a role of pulling the front foot joint 28, but also forms a four-bar linkage allowing one side to be slightly changed with the second connecting piece 39, the fourth connecting piece 40 and the two fifth connecting pieces 42 fixed at two ends of the second connecting piece 43, so that the four-bar linkage can ensure that the second connecting piece 39 is kept at or close to the top ends of the arc holes of the front foot slide block 24 and the front foot joint 28 in the whole process of unfolding the frame due to the length limitation of each connecting bar, and the front foot slide block 24 can not interfere with the vehicle folding due to too many ports extending out of the front foot joint 28.

The embodiment also provides a child stroller, which comprises the child stroller frame provided by the embodiment.

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

Claims (17)

1. A stroller frame, comprising:

the handlebar group (1) comprises a handlebar assembly and a seat fixing seat (22) arranged at the lower end of the handlebar assembly;

a forefoot group (2) comprising a forefoot joint (28);

a hindfoot group (3) comprising a hindfoot joint (32);

a first locking device which is arranged between the seat fixing seat (22) and the front foot joint (28) and locks the front foot joint (28) and the seat fixing seat (22); and

and a second locking device which is arranged between the rear foot joint (32) and the seat fixing seat (22) and the front foot joint (28) and locks the rear foot joint (32) with the seat fixing seat (22) and the front foot joint (28), wherein the handlebar set (1) is telescopically arranged to unlock the first locking device and the second locking device.

2. The stroller frame according to claim 1, wherein the seat holder (22) has a handle slot, the front leg joint (28) has a front leg slot, and the first locking means comprises a handle slider (21) slidably disposed in the handle slot and a front leg slider (24) slidably disposed in the front leg slot, wherein when the stroller frame is in the unfolded state, the handle slot and the front leg slot are in the same direction, and the front leg slider (24) extends into the handle slot and abuts against the handle slider (21).

3. Stroller frame according to claim 2, wherein the handle slider (21) has a first elongated hole, the length direction of the first elongated hole is the same as the extending direction of the handle slot, the seat holder (22) is provided with a first connector (19) penetrating the first elongated hole and connecting the seat holder (22) and the rear foot joint (32), the front foot slider (24) has a second elongated hole, and the front foot joint (28) is provided with a second connector (39) penetrating the second elongated hole and connecting the front foot joint (28) and the rear foot joint (32).

4. Stroller frame according to claim 3, characterized in that the lower end of the front foot slider (24) is provided with an open slot, and the front foot set (2) further comprises a third connector (31) arranged on the front foot joint (28) and a spring arranged between the third connector (31) and the bottom of the open slot.

5. The stroller frame of claim 4, wherein the second elongated hole has a length direction that is the same as the extending direction of the forefoot slot.

6. The stroller frame according to claim 5, wherein the seat holder (22) is provided with a first engaging groove, the front leg joint (28) is provided with a second engaging groove, the second locking device comprises a locking stopper (37), a first engaging pin and a second engaging pin respectively disposed on two sides of the locking stopper (37), and a stopper base (36) fixedly disposed on the rear leg joint (32), the first engaging pin is engaged with the first engaging groove, the second engaging pin is engaged with the second engaging groove, and the locking stopper (37) is movably disposed relative to the stopper base (36).

7. Stroller frame according to claim 6, characterized in that the rear foot joint (32) is provided with two elongated holes corresponding to the first and second detents, along which the first and second detents move when the locking stop (37) is moved with respect to the stop base (36).

8. The stroller frame according to claim 6, further comprising an unlocking assembly, wherein the unlocking assembly comprises a boss arranged on one side of the front foot slider (24) close to the rear foot joint (32) and an unlocking top block (26) rotatably connected to the rear foot joint (32), the unlocking top block (26) abuts against the top end of the locking stop block (37), and the boss pushes the unlocking top block (26) to rotate to drive the locking stop block (37) to move during the sliding process of the front foot slider (24).

9. The stroller frame according to claim 4, wherein the length direction of the second elongated hole (241) is inclined obliquely downward with respect to the extending direction of the front foot slot, an arc-shaped hole (28A) is formed in the front foot joint (28), the second elongated hole (241) and the arc-shaped hole (28A) are arranged in a crossed manner, and the second connector (39) is inserted into the arc-shaped hole (28A) and the second elongated hole (241).

10. Stroller frame according to claim 9, wherein the second locking means comprises a fourth connector (40) and a first connecting tab (38) connecting the second connector (39) and the fourth connector (40), the fourth connector (40) is arranged on the seat holder (22) and connected to the rear foot joint (32), the second connector (39) abuts against the bottom end of the second elongated hole (241) and is located below the line connecting the fourth connector (40) and the third connector (31) when the first locking means locks the front foot joint (28) and the seat holder (22); when the first locking device is unlocked, the second connecting piece (39) abuts against the top end of the second elongated hole (241) and is positioned above the connecting line of the fourth connecting piece (40) and the third connecting piece (31).

11. Stroller frame according to claim 10, wherein the distance between the second connector (39) and the fourth connector (40) is twice the radius of the centre line of the arc shaped hole (28A).

12. Stroller frame according to claim 10, wherein the second locking means further comprises a second connecting tab (43) connecting the front foot joint (28) and the rear foot joint (32), the first connecting tab (38), the front foot joint (28), the second connecting tab (43) and the rear foot joint (32) together forming a four-bar linkage.

13. Stroller frame according to claim 12, wherein the second connecting piece (43) has an elongated hole at a first end and is connected to the seat holder (22) and the rear foot joint (32) by a fifth connecting piece (42) inserted in the elongated hole, and the second connecting piece (43) is connected to the front foot joint (28) at a second end.

14. Stroller frame according to claim 2, wherein the handle assembly comprises a handle extension tube (11), a handle end plug (16) and a handle sleeve (18), the handle end plug (16) is arranged at the lower end of the handle extension tube (11) and moves downwards with the handle extension tube (11) relative to the handle sleeve (18), the handle end plug (16) pushes the handle slider (21) to move downwards to unlock the first locking means.

15. The stroller frame according to claim 14, wherein the handle assembly further comprises a handle, a handle cord (12) connected to the handle, and a button (10), a first end of the handle cord (12) is provided with a connector (121) connected to the button (10), a second end of the handle cord (12) is provided with a locking block (122), the handle sleeve (18) is provided with a locking groove, and the button (10) is rotatably disposed relative to the handle to drive the handle cord (12) to move so that the locking block (122) enters or leaves the locking groove.

16. The stroller frame according to claim 15, wherein the handle sleeve (18) is provided with a plurality of latching grooves spaced apart in a longitudinal direction of the handle sleeve (18), and the latching block (122) is selectively inserted into one of the plurality of latching grooves to latch.

17. A stroller comprising a stroller frame according to any of claims 1 to 16.

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