CN218172368U

CN218172368U - Children's barrow

Info

Publication number: CN218172368U
Application number: CN202221405684.XU
Authority: CN
Inventors: 贺新军; 张阳
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-12-30
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a child stroller, the frame of which comprises a first side bracket and a second side bracket which are respectively arranged at the left side and the right side, the first side bracket comprises a first side supporting rod and a first sliding part which is arranged on the first side supporting rod in a sliding way, the second side bracket comprises a second side supporting rod and a second sliding part which is arranged on the second side supporting rod in a sliding way; the transverse supporting rod is arranged between the first sliding part and the second sliding part, the frame is further provided with a linkage device which is used for linking the second sliding part along the second side supporting rod in the sliding process so as to transversely fold the transverse supporting rod, the linkage device enables the frame to be folded in the process, the driving part is matched with the first matching part in the folding starting stage and does not drive the transverse supporting rod to transversely fold, and the driving part is matched with the second matching part to transversely fold the transverse supporting rod in a linkage manner after the frame is folded to a certain degree, so that the condition that the folding starting stage can fold the whole vehicle only by large external force is avoided, and the folding operation is more labor-saving and light.

Description

Children's barrow

Technical Field

The utility model relates to a children's shallow.

Background

Most of the existing stroller are foldable for reducing the volume, wherein the size of the stroller in the up-down and front-back directions can be reduced by folding the stroller, but the stroller has a larger size in the transverse direction, so that the stroller is inconvenient for a user to carry outside. In addition, although some stroller apparatuses can be folded transversely, the transverse folding operation needs to be completed by performing multiple steps during the folding process, and the operation burden of the user is heavy.

To solve the above problems, chinese patent CN215904566U discloses a stroller, wherein a linkage device is disposed on the frame, so that the main rod of the frame can rotate relatively and be folded, and the linkage device drives the cross-brace assembly to extend and retract along the left and right directions, thereby simplifying the folding operation of the frame. However, the frame can be folded only by applying a large force during folding, which results in a great effort and inconvenience in use during folding.

Disclosure of Invention

The utility model aims at providing an improved children's barrow, so that it is more laborsaving when folding.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a stroller comprises a frame with an unfolded state and a folded state, wherein the frame comprises a first side support and a second side support which are respectively arranged at the left side and the right side, and a cross-brace assembly which can be transversely folded along the left side and the right side and is arranged between the first side support and the second side support, the first side support comprises a first side support rod and a first sliding part which can be relatively slidably arranged on the first side support rod along the length extension direction of the first side support rod, and the second side support comprises a second side support rod and a second sliding part which can be relatively slidably arranged on the second side support rod along the length extension direction of the second side support rod; the transverse supporting rod assembly at least comprises a transverse supporting rod which extends along the left-right direction and is arranged between the first sliding part and the second sliding part, the transverse supporting rod comprises a first rod and a second rod which can relatively slide and stretch along the left-right direction, the first rod and the first sliding part are relatively fixedly arranged, the second rod can be rotatably connected with the second sliding part around the axis of the second rod, a matching structure which can slide and stretch relative to the first rod in the process that the second rod rotates around the axis of the second rod is further arranged between the first rod and the second rod,

the frame is further provided with a linkage device which is used for enabling the second rod to rotate around the axis line of the second rod in a linkage manner in the process that the second sliding piece slides along the second side supporting rod, the linkage device comprises a driving piece fixedly arranged on the second rod and a matching piece arranged on the second side supporting rod, the matching piece is provided with a first matching part and a second matching part which are connected along the length extending direction of the second side supporting rod, and when the driving piece is matched with the first matching part, the second rod is fixed relative to the first rod; when the driving piece is matched with the second matching part, the second rod rotates around the axis of the second rod and slides and stretches relative to the first rod.

Preferably, the linkage device further comprises a limiting mechanism which is arranged between the second side supporting rod and the second rod and used for limiting the second rod to rotate around the axis of the second rod when the driving piece is matched with the first matching part.

Further, the limiting mechanism comprises a limiting block fixedly arranged on the second rod and a limiting strip fixedly arranged on the second side supporting rod and extending along the length direction of the second side supporting rod, the periphery of the outer side of the limiting block is provided with a limiting plane, the limiting strip is provided with a first plane and a second plane which are connected along the length direction, and when the driving piece is matched with the first matching part, the limiting plane is matched and abutted against the first plane; when the driving piece is matched with the second matching part, the limiting plane is separated from the first plane and is arranged at a distance from the second plane.

In some embodiments, the stopper is in a ring shape with a shaft axis coinciding with a shaft axis of the second rod, the outer circumference of the stopper further has an arc surface, the arc surface and the stopper plane are connected in a circumferential direction to form an outer circumferential surface of the stopper, and when the driving member and the second matching portion are matched with each other, the arc surface and the second plane are in rolling contact.

In some embodiments, the first plane and the second plane are parallel to each other, and a spacing between the first plane and an axis of the second shaft is less than a spacing between the second plane and an axis of the second shaft.

Preferably, the driving member includes a gear fixedly disposed on the second rod, the mating member includes a rack belt fixedly disposed on the second side support rod, the rack belt includes a first belt section and a second belt section connected along a length direction, an outer side edge portion of the first belt section and the gear are disposed at an interval, a tooth portion capable of being engaged with the gear is disposed on an outer side edge portion of the second belt section, the first belt section constitutes the first mating portion, and the second belt section constitutes the second mating portion.

Preferably, the second rod is capable of relatively sliding and relatively rotating around the axis of the second rod, and is inserted into the rod cavity of the first rod, the matching structure comprises an internal thread arranged in the rod cavity of the first rod and an external thread arranged on the outer periphery of the second rod, and the internal thread and the external thread are in threaded matching connection.

Preferably, first side branch with second side branch all extends along upper and lower direction, the frame is by the in-process that expandes the state to fold condition conversion, first slider is followed first side branch is from top to bottom moved, the second slider is followed second side branch is from top to bottom moved, first cooperation portion is in be located on the second side branch the top of second cooperation portion.

Further, the second side support further comprises a second driving rod extending along the vertical direction when the frame is in the unfolded state, the lower portion of the second driving rod is rotatably connected with the second sliding piece, an included angle alpha is formed between the length extending direction of the second driving rod and the length extending direction of the second side support, and when the driving piece is matched with the first matching portion, the numerical value of the included angle alpha is larger than that when the driving piece is matched with the second matching portion.

As a specific embodiment, the first side strut is a first rear strut, the second side strut is a second rear strut, the first side support further includes a first front strut, a first seat strut, a first handrail strut, and a first push rod, two of the three components, namely, the upper portion of the first front strut, the upper portion of the first rear strut, and the front portion of the first handrail strut, are rotatably connected and the third component is rotatably connected with one of the two components, or the three components, namely, the upper portion of the first front strut, the upper portion of the first rear strut, and the front portion of the first handrail strut, are rotatably connected around a same rotation center line, the rear portion of the first front strut is rotatably disposed on the first push rod, the lower portion of the first push rod is rotatably connected to the first sliding member, the front portion of the first seat strut is rotatably connected to the first front strut, and the rear portion of the first seat strut is rotatably connected to the first sliding member; the second side support further comprises a second front support rod, a second seat rod, a second handrail rod and a second push rod, wherein the upper portion of the second front support rod, the upper portion of the second rear support rod and two of the three front portions of the second handrail rod are rotatably connected, the third front portion of the second front support rod is rotatably connected with two of the two front portions of the second handrail rod, or the upper portion of the second front support rod, the upper portion of the second rear support rod and the three front portions of the second handrail rod are rotatably connected around the same rotation center line, the rear portion of the second handrail rod is rotatably arranged on the second push rod, the lower portion of the second push rod is rotatably connected to the second sliding member, the front portion of the second seat rod is rotatably connected to the second front support rod, and the rear portion of the second seat rod is rotatably connected to the second sliding member.

Because of the application of above-mentioned technical scheme, compared with the prior art, the utility model has the following advantage: the utility model discloses a children's barrow, wherein the driving piece has no or only little friction when mutually matching with the first matching part, the transverse stay bar does not contract at this stage; and when the first matching part and the second matching part are matched with each other, the linkage is realized so that the transverse supporting rod is contracted. Therefore, in the process of folding the frame, the driving piece is matched with the first matching part in the folding starting stage, and the driving piece is matched with the second matching part to be transversely folded in a linkage manner after the frame is folded to a certain degree, so that the condition that the folding of the whole vehicle can be realized only by large external force in the folding starting stage is avoided, and the folding operation is more labor-saving and light. Correspondingly, the frame is more labor-saving in the unfolding process, and the operation burden is small.

Drawings

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

FIG. 2 is an exploded view of the connection structure between the first side bar, the second side bar and the cross bar of the stroller of FIG. 1;

FIG. 3 is a side view of the stroller of FIG. 1;

FIG. 4 is a front view of the connection structure between the first side bar, the second side bar and the cross bar of the stroller of FIG. 3;

FIG. 5 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 4;

fig. 6 is a schematic side view of the stroller shown in fig. 1 during folding;

FIG. 7 is a front view of the connection structure between the first side bar, the second side bar and the cross bar of the stroller of FIG. 6;

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7;

FIG. 9 is a side view of the stroller of FIG. 1 in a folded configuration;

fig. 10 is a front view of the connection structure between the first side bar, the second side bar and the cross bar of the stroller of fig. 9;

FIG. 11 is a schematic sectional view taken along line C-C of FIG. 10;

wherein: 10. a first side support; 11. a first side strut (first rear strut); 12. a first slider; 13. a first front support bar; 14. a first seat post; 15. a first grab rail; 16. a first push rod (first drive lever); 17. a first push handle; 20. a second side bracket; 21. a second side strut (second rear strut); 22. a second slider; 23. a second front support bar; 24. a second seat post; 25. a second grab rail; 26. a second push rod (second drive lever); 27. a second push handle; 30. a transverse stay bar; 301. a first lever; 302. a second lever; 40. a front wheel assembly; 50. a rear wheel assembly; 60. a front telescoping rod; 70. a rear telescopic rod; 80. an upper cross brace;

1. a drive member (gear); 2. mating members (rack belts); 2a, a first belt segment (first mating portion); 2b, a second belt segment (second mating portion); 3. a limiting strip; 3a, a first plane; 3b, a second plane; 4. a limiting block; 4a, a limiting plane; 4b, an arc surface.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 11, a stroller includes a frame having an unfolded state and a folded state, two sets of front wheel assemblies 40 disposed at left and right sides of a front portion of the frame bottom, and two sets of rear wheel assemblies 50 disposed at left and right sides of a rear portion of the frame bottom, the frame having first and second side brackets 10 and 20 disposed at left and right sides, respectively, and a cross brace assembly disposed between the first and second side brackets 10 and 20 so as to be folded transversely in a left-right direction.

The first side bracket 10 at least has a first side support rod 11 and a first sliding part 12 which can be relatively slidably arranged on the first side support rod 11 along the length extending direction of the first side support rod 11, the second side bracket 20 at least comprises a second side support rod 21 and a second sliding part 22 which can be relatively slidably arranged on the second side support rod 21 along the length extending direction of the second side support rod 21, the first sliding part 12 slides along the first side support rod 11, and the second sliding part 22 slides along the second side support rod 21 during the process of switching the frame between the unfolding state and the folding state.

Referring to fig. 2, the transverse strut assembly at least comprises a transverse strut 30 extending in the left-right direction and arranged between the first sliding member 12 and the second sliding member 22, the transverse strut 30 comprises a first rod 301 and a second rod 302 capable of relatively sliding and stretching in the left-right direction, the first rod 301 and the first sliding member 12 are relatively fixedly arranged, the second rod 302 can relatively rotatably connect with the second sliding member 22 around the axis thereof, and a matching structure capable of sliding and stretching relative to the first rod 301 in the process that the second rod 302 rotates around the axis thereof is further arranged between the first rod 301 and the second rod 302. In this embodiment, the engaging structure is specifically a threaded connecting structure, and specifically, the end of the second rod 302 is inserted into the rod cavity of the first rod 301 to be capable of both sliding relatively and rotating relatively around its own axis, the engaging structure between the two includes an internal thread provided in the rod cavity of the first rod 301 and an external thread provided on the outer peripheral portion of the second rod 302, and the internal thread and the external thread are connected in a threaded manner.

The frame is further provided with a linkage device for linking the second rod 302 to rotate around the axis line thereof in the process that the second sliding member 22 slides along the second side support rod 21, so that the first side support 10 and the second side support 20 at two sides of the frame are linked to rotate the second rod 302 in the process of unfolding and folding, and the transverse support rod 30 is further extended and retracted transversely and unfolded or folded along the left-right direction.

The linkage device comprises a driving piece 1 fixedly arranged on the second rod 302 and a matching piece 2 arranged on the second side supporting rod 21, wherein the matching piece 2 is provided with a first matching part 2a and a second matching part 2b which are connected along the length extending direction of the second side supporting rod 21, when the driving piece 1 is matched with the first matching part 2a, the second rod 302 is fixed relative to the first rod 301, namely the second rod 302 cannot rotate at the moment, and the transverse supporting rod 30 cannot stretch out and draw back along the left-right direction; when the driver 2 and the second engaging portion 2b are engaged with each other, the second rod 302 can rotate around its axis and slide and expand relative to the first rod 301, so that the cross bar 30 is correspondingly extended or shortened in the left-right direction. Thus, in the stroke of the second sliding member 22 sliding along the length extending direction of the second side supporting rod 21, when the driving member 1 is engaged with the first engaging portion 2a of the engaging member 2 within a certain stroke, the second rod 302 does not rotate, and at this time, the external force to be applied only needs to drive the second sliding member 22 to slide along the second side supporting rod 21; when the driving element 1 is engaged with the second engaging portion 2b of the engaging element 2 in another stroke, the second rod 302 rotates to extend and retract the cross brace 30, and the external force to be applied includes driving the second sliding element 22 to slide along the second side support rod 21, and simultaneously, the friction force when the driving element 1 is engaged with the second engaging portion 2b needs to be overcome.

In the process of folding the frame, the stroke of the driving element 1 matched with the first matching part 2a can be arranged before the stroke of the driving element 1 matched with the second matching part 2 b; and in the process of unfolding the vehicle frame, the stroke of the mutual matching of the driving element 1 and the first matching part 2a is arranged after the stroke of the mutual matching of the driving element 1 and the second matching part 2b. This makes the frame more labor efficient both when folded and when unfolded.

In this embodiment, the driving member 1 includes a gear fixedly disposed on the second rod 302, the engaging member 2 includes a rack belt fixedly disposed on the second side support rod 21, the rack belt includes a first belt section 2a and a second belt section 2b connected in a length direction, an outer side portion of the first belt section 2a is disposed at a distance from an outer peripheral portion of the gear, and an outer peripheral portion of the second belt section 2b has a tooth portion capable of meshing with the gear, wherein the first belt section 2a constitutes the first engaging portion 2a, and the second belt section 2b constitutes the second engaging portion 2b.

Referring to the drawings, the first side support rod 11 and the second side support rod 21 both extend along the vertical direction, and during the process of converting the frame from the unfolded state to the folded state, the first sliding member 12 moves from top to bottom along the first side support rod 11, the second sliding member 22 moves from top to bottom along the second side support rod 21, and the first matching portion 2a is located above the second matching portion 2b on the second side support rod 21, that is, the first belt segment 2a is located above the second belt segment 2b.

The first side bracket 10 further includes a first driving lever 16 extending in an up-and-down direction when the frame is in the unfolded state, and a lower portion of the first driving lever 16 is rotatably connected to the first slider 12; the second side bracket 20 further includes a second driving rod 26 extending in the up-and-down direction when the frame is in the unfolded state, a lower portion of the second driving rod 26 is rotatably connected to the second sliding member 22, an included angle α is formed between a length extending direction of the second driving rod 26 and a length extending direction of the second side support rod 21, and a value of the included angle α when the driving member 1 is engaged with the first engaging portion 2a is greater than a value of the included angle α when the driving member 1 is engaged with the second engaging portion 2b.

Thus, in the process of folding the frame, when the frame is folded, the value of the included angle α is relatively large, that is, the pressure angle between the second driving rod 26 and the second side support rod 21 is large, and in the process of applying a force to the second driving rod 26 to drive the second sliding member 22 to slide downward, the external force to be applied also needs to be large, and at this time, the matching between the driving member 1 and the first matching portion 2a does not need to overcome the relative matching between the driving member 1 and the first matching portion 2a to drive the second rod 302 to rotate, and the friction between the driving member 1 and the first matching portion 2a is small, and it can be considered that only the external force needs to be provided to drive the second sliding member 22 to slide downward at this stage; after the second sliding member 22 slides downward to a certain position, since the second driving rod 26 rotates relative to the second sliding member 22 and gradually approaches toward the second side supporting rod 21, the value of the included angle α is reduced, at this time, the second driving rod 26 needs to be applied to drive the downward sliding force of the second sliding member 22 to be relatively reduced, at this time, the matching between the driving member 1 and the second matching portion 2b needs to overcome the friction force between the two so as to drive the second rod 302 to rotate, and at this time, the external force which needs to be applied generally still is not very large. Therefore, in the whole folding process of the frame, the external force required to be applied does not need to be large, and the aim of saving labor in folding is achieved.

On the frame, the linkage device further comprises a limiting mechanism which is arranged between the second side supporting rod 21 and the second rod 302 and used for limiting the second rod 302 to rotate around the axis line of the limiting mechanism when the driving piece 1 is matched with the first matching part 2a, the limiting mechanism can ensure that the transverse supporting rod 30 starts to shrink when the driving piece 1 is matched with the second matching part 2b, and the frame can reach the preset folding shape and size.

Specifically, referring to fig. 2 to 11, the limiting mechanism includes a limiting block 4 fixed on the second rod 302, and a limiting strip 3 fixed on the second side support rod 21 and extending along the length extending direction of the second side support rod 21, the outer peripheral portion of the limiting block 4 has a limiting plane 41, the limiting strip 3 is provided with a first plane 3a and a second plane 3b connected along the length direction, when the driving element 1 and the first matching portion 2a are matched with each other, the limiting plane 41 is matched to abut against the first plane 3a, so that the limiting block 4 and the second rod 302 cannot rotate; when the driving element 1 is engaged with the second engaging portion 2b, the limiting plane 41 is disengaged from the first plane 3a, and is spaced from the second plane 3b, at this time, the limiting block 4 can no longer be limited by the limiting bar 3 and can not rotate, and the second rod 302 can rotate around its axis under the engaging action of the driving element 1 and the second engaging portion 2b, so as to realize the transverse contraction of the transverse supporting rod 30.

In this embodiment, the limiting block 4 is in a ring shape with the axis coinciding with the axis of the second rod 302, the outer circumference of the limiting block 4 further has an arc surface 42, the arc surface 42 and the limiting plane 41 are connected in the circumferential direction to form the outer circumference of the limiting block 4, and when the driving member 1 is matched with the second matching portion 2b, the arc surface 42 is in rolling contact with the second plane 42. Here, the first plane 3a and the second plane 3b are parallel to each other, and the interval between the first plane 3a and the axis of the second shaft 302 is smaller than the interval between the second plane 3b and the axis of the second shaft 302. When the device is specifically arranged, the limiting block 4 is arranged at the outer end part of the second rod 302, the limiting strip 3 is clamped between the matching piece 2 and the second side supporting rod 21, and the limiting block 4 and the limiting strip 3 are both made of wear-resistant materials.

Referring to the drawings, in the frame provided by the embodiment, the specific structure is as follows:

the first side supporting rod 11 is a first rear supporting rod 11, the second side supporting rod 21 is a second rear supporting rod 21, and the bottom of the first rear supporting rod 11 and the bottom of the second rear supporting rod 21 are both provided with rear wheel assemblies 50. The first side bracket 10 further comprises a first front support rod 13, a first seat rod 14, a first handrail rod 15, a first push rod 16 and a first push handle 17, wherein two of the three parts of the upper part of the first front support rod 13, the upper part of the first rear support rod 11 and the front part of the first handrail rod 15 are rotationally connected and the third part is rotationally connected with one of the two parts, or the three parts of the upper part of the first front support rod 13, the upper part of the first rear support rod 11 and the front part of the first handrail rod 15 are rotationally connected around the same rotation center line, the rear part of the first handrail rod 15 is rotationally arranged on the first push rod 16, the lower part of the first push rod 16 is rotationally connected on the first sliding piece 12, the front part of the first seat rod 14 is rotationally connected on the first front support rod 13 and the rear part of the first seat rod 14 is rotationally connected on the first sliding piece 12, and the first push handle 17 can be connected with the upper part of the first push rod 16 in a relative sliding way along the length direction; the second side bracket 20 further includes a second front support rod 23, a second seat rod 24, a second handle rod 25, a second push rod 26, and a second push handle 27, two of the three components of the upper portion of the second front support rod 23, the upper portion of the second rear support rod 21, and the front portion of the second handle rod 25 are rotatably connected and the third component is rotatably connected to two of the two components, or the three components of the upper portion of the second front support rod 23, the upper portion of the second rear support rod 21, and the front portion of the second handle rod 25 are rotatably connected around the same rotation center line, the rear portion of the second handle rod 25 is rotatably disposed on the second push rod 26, the lower portion of the second push rod 26 is rotatably connected to the second slider 22, the front portion of the second seat rod 24 is rotatably connected to the second front support rod 23 and the rear portion of the second seat rod 24 is rotatably connected to the second slider 22, and the second push handle 27 is connected to the upper portion of the second push rod 26 in a manner that it can relatively slide along its length direction. The bottom of the first front supporting rod 13 and the bottom of the second front supporting rod 23 are provided with front wheel assemblies. The first push rod 16 is configured as the first drive rod, and the second push rod 26 is configured as the second drive rod.

The cross brace assembly further comprises a front telescopic rod 60 arranged between the lower parts of the first front support rod 13 and the second front support rod 23, a rear telescopic rod 70 arranged between the lower parts of the first rear support rod 11 and the second rear support rod 21, and an upper cross brace 80 arranged on the upper parts of the first push handle 17 and the second push handle 27 and capable of being folded along the transverse direction.

When the bicycle frame is folded, as shown in fig. 1 and 3, when a user presses the upper cross brace 80 and presses downward to apply force, the first push handle 17, the first push rod 16, the second push handle 27 and the second push rod 26 all move downward and rotate relative to the first sliding part 12 and the second sliding part 22, at this time, the first sliding part 12 slides downward along the first rear support rod 11, the second sliding part 22 slides downward along the second rear support rod 21, and links the relative rotation of the rods on the first side support 10 and the second side support 20 respectively to gradually close. Finally, the first push handle 17 is driven to slide relative to the first push rod 16 to fold to the rear side of the first push rod 16, and the second push handle 27 is driven to slide relative to the second push rod 26 to fold to the rear side of the second push rod 26, so as to fold the frame, as shown in fig. 3, 6 to 9.

In the above process, along with the folding of the first side bracket 10 and the second side bracket 20, the first push rod 16 is gradually folded in the front-back direction relative to the first rear support rod 11, the second push rod 26 is gradually folded in the front-back direction relative to the second rear support rod 21, the included angle between the first push rod 16 and the first rear support rod 11, and the included angle α between the second push rod 26 and the second rear support rod 21 are gradually reduced.

In the folding process, in the initial stroke in which the first sliding member 12 starts to slide relative to the first rear support rod 11 and the initial stroke in which the second sliding member 22 starts to slide relative to the second rear support rod 21, as shown in fig. 3 to 5, the driving member 1 is engaged with the first engaging portion 2a so that the second rod 302 does not rotate, and the limiting plane 41 of the limiting block 4 abuts against the first plane 3a to ensure that the second rod 302 does not rotate when being subjected to other factors, at this stage, the transverse support rod 30 does not extend and retract, and the external force to be applied only needs to drive the first sliding member 12 to slide downward relative to the first rear support rod 11 and drive the second sliding member 22 to slide downward relative to the second rear support rod 21.

When the first sliding member 12 slides to a certain position on the first rear support rod 11 and the second sliding member 22 slides to a certain position on the second rear support rod 21, as shown in fig. 6 to 8, the driving member 1 starts to engage with the second engaging portion 2b, i.e. the gear and the teeth of the rack belt start to engage, the second rod 302 can rotate around its own axis, at this time, the limit plane 41 is separated from the first plane 3a, the whole limit block 4 engages with the second plane 3b, and the arc surface 42 thereof can contact with the second plane 3b in a rolling engagement manner. At this stage, the applied external force needs to drive the first sliding member 12 to slide downward relative to the first rear supporting rod 11, and the second sliding member 22 to slide downward relative to the second rear supporting rod 21, and at the same time, the friction force generated when the gears and the teeth are mutually matched needs to be overcome, and at this time, the force required for driving the first sliding member 12 and the second sliding member 22 to slide downward is greatly reduced, so that the total value of the applied external force at this stage still does not need to be large.

Until the first side bracket 10 and the second side bracket 20 are folded respectively, as shown in fig. 9 to 11, all the rods on each side bracket are folded together in the front-rear direction, the first rod 301 and the second rod 302 of the transverse supporting rod 30 are also transversely contracted to be transversely folded, and the front telescopic rod 60 and the rear telescopic rod 70 are also transversely contracted automatically in the above process.

The process of unfolding the frame is opposite to the process of folding the frame, and the description is omitted here.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a children's shallow, is including having the frame of expansion state and fold condition, the frame is including dividing first side support and the second side support of locating left and right sides to and can set up with transversely folding up along left right direction first side support with stull subassembly between the second side support, its characterized in that: the first side bracket comprises a first side supporting rod and a first sliding piece which can be relatively slidably arranged on the first side supporting rod along the length extending direction of the first side supporting rod, and the second side bracket comprises a second side supporting rod and a second sliding piece which can be relatively slidably arranged on the second side supporting rod along the length extending direction of the second side supporting rod; the transverse supporting rod assembly at least comprises a transverse supporting rod which extends along the left-right direction and is arranged between the first sliding part and the second sliding part, the transverse supporting rod comprises a first rod and a second rod which can relatively slide and stretch along the left-right direction, the first rod and the first sliding part are relatively fixedly arranged, the second rod can be rotatably connected with the second sliding part around the axis of the second rod, a matching structure which can slide and stretch relative to the first rod in the process that the second rod rotates around the axis of the second rod is further arranged between the first rod and the second rod,

2. The stroller of claim 1, wherein: the linkage device further comprises a limiting mechanism which is arranged between the second side supporting rod and the second rod and used for limiting the second rod to rotate around the axis of the second rod when the driving piece is matched with the first matching part.

3. The stroller of claim 2, wherein: the limiting mechanism comprises a limiting block fixedly arranged on the second rod and a limiting strip fixedly arranged on the second side supporting rod and extending along the length direction of the second side supporting rod, the periphery of the outer side of the limiting block is provided with a limiting plane, the limiting strip is provided with a first plane and a second plane which are connected along the length direction, and when the driving piece is matched with the first matching part, the limiting plane is matched and abutted against the first plane; when the driving piece is matched with the second matching part, the limiting plane is separated from the first plane and is arranged at a distance from the second plane.

4. The stroller of claim 3, wherein: the limiting block is in a ring shape, the axial line of the limiting block coincides with the axial line of the second rod, the periphery of the outer side of the limiting block is further provided with an arc surface, the arc surface and the limiting plane are connected in the circumferential direction to form the peripheral surface of the outer side of the limiting block together, and when the driving piece is matched with the second matching part, the arc surface is in rolling contact with the second plane.

5. The stroller of claim 4, wherein: the first plane and the second plane are parallel to each other, and a distance between the first plane and the axis of the second rod is smaller than a distance between the second plane and the axis of the second rod.

6. The stroller of claim 1, wherein: the driving piece comprises a gear fixedly arranged on the second rod, the matching piece comprises a rack belt fixedly arranged on the second side supporting rod, the rack belt comprises a first belt section and a second belt section which are connected along the length direction, the outer side edge of the first belt section is arranged at a distance from the gear, a tooth part which is meshed with the gear is arranged on the outer side edge of the second belt section, the first belt section forms the first matching part, and the second belt section forms the second matching part.

7. The stroller of claim 1, wherein: the second rod can relatively slide and relatively rotate around the axis of the second rod to be arranged in the rod cavity of the first rod in a penetrating mode, the matching structure comprises an internal thread arranged in the rod cavity of the first rod and an external thread arranged on the periphery of the outer side of the second rod, and the internal thread and the external thread are connected in a threaded matching mode.

8. Child stroller according to any one of claims 1 to 7, characterized in that: first side branch with second side branch all extends along upper and lower direction, the frame is by the in-process that expandes the state to fold condition conversion, first slider is followed first side branch is from top to bottom motion, the second slider is followed second side branch is from top to bottom motion, first cooperation portion is in be located on the second side branch the top of second cooperation portion.

9. The stroller of claim 8, wherein: the second side support further comprises a second driving rod extending along the vertical direction when the frame is in the unfolded state, the lower portion of the second driving rod is rotatably connected with the second sliding piece, an included angle alpha is formed between the length extending direction of the second driving rod and the length extending direction of the second side support, and the numerical value of the included angle alpha is larger than that of the included angle alpha when the driving piece is matched with the first matching portion.

10. The stroller of claim 8, wherein: the first side support rod is a first rear support rod, the second side support rod is a second rear support rod, the first side support further comprises a first front support rod, a first seat rod, a first handrail rod and a first push rod, two of the three parts of the upper part of the first front support rod, the upper part of the first rear support rod and the front part of the first handrail rod are rotationally connected, and the third part is rotationally connected with one of the two parts, or the three parts of the upper part of the first front support rod, the upper part of the first rear support rod and the front part of the first handrail rod are rotationally connected around the same rotation center line, the rear part of the first handrail rod is rotationally arranged on the first push rod, the lower part of the first push rod is rotationally connected to the first sliding member, the front part of the first seat rod is rotationally connected to the first front support rod, and the rear part of the first seat rod is rotationally connected to the first sliding member; the second side support further comprises a second front support rod, a second seat rod, a second handrail rod and a second push rod, wherein the upper portion of the second front support rod, the upper portion of the second rear support rod and two of the three front portions of the second handrail rod are rotationally connected, the third portion of the second front support rod is rotationally connected with two of the two front portions, or the upper portion of the second front support rod, the upper portion of the second rear support rod and the three front portions of the second handrail rod are rotationally connected around the same rotation center line, the rear portion of the second handrail rod is rotationally arranged on the second push rod, the lower portion of the second push rod is rotationally connected on the second sliding member, the front portion of the second seat rod is rotationally connected on the second front support rod, and the rear portion of the second seat rod is rotationally connected on the second sliding member.