CN116534107A - Child cart - Google Patents

Abstract

The invention discloses a baby stroller, which comprises a stroller frame with an unfolding state and a folding state, wherein the stroller frame comprises a side bracket and a cross bar assembly, the side bracket comprises a front bracket, a rear bracket assembly, a push rod assembly, a side handrail, a lower connecting rod, a front connecting rod and a rear pull rod, the rear bracket assembly comprises a rear upper rod and a rear lower rod which are connected in a sliding manner, the side handrail is rotationally connected with the push rod assembly, two of the side handrail, the front bracket and the rear upper rod are rotationally connected with one of the side handrail, the front bracket and the rear upper rod, or the three are coaxially rotationally connected with one another, the lower connecting rod is rotationally connected with the push rod assembly and the rear upper rod respectively, two ends of the front connecting rod are rotationally connected with the front bracket and the lower connecting rod respectively, and the cross bar assembly comprises a rear cross bar assembly arranged between the rear lower rods on two sides. The child stroller has good rigidity in an unfolding state, and is compact in structure, small in size and convenient to carry and store after being folded.

Description

Child cart

Technical Field

The invention relates to the technical field of children products, in particular to a child trolley.

Background

The baby carriage is used as a common child product, and plays a great role in carrying children out at home. When the child cart is not in use, it is required to be folded and stored. Some children's carts in the prior art have the structure rigidity when expanding the use not enough, and the structure volume is still great problem after folding.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a child stroller which has good structural rigidity in unfolding and use and small structural volume after folding.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a children's shallow, includes the shallow frame that has expansion state and folding state, the shallow frame is including setting up respectively in the side support of left and right sides and connect in the left and right sides between the side support the stull subassembly, every side the side support all includes:

the front wheel assembly is arranged at the lower part of the front bracket;

the rear bracket assembly comprises a rear upper rod and a rear lower rod which can be arranged on the rear upper rod in a sliding manner along the length extension direction of the rear upper rod, and the rear wheel assembly is arranged at the lower part of the rear lower rod;

a push rod assembly;

a side armrest, the upper part of which is rotationally connected with the lower part of the push rod assembly, the lower part of the side armrest, the upper part of the front bracket and the upper part of the rear upper rod are rotationally connected, and a third one is rotationally connected with any one of the above three or coaxially rotationally connected with the above three;

the upper part of the lower connecting rod is rotationally connected with the lower part of the push rod assembly, and the lower connecting rod is rotationally connected with the rear upper rod;

The front connecting rod is rotatably connected with the front bracket at one end part, and is rotatably connected with the lower connecting rod at the other end part;

the rear pull rod is rotatably connected with the lower part of the lower connecting rod at one end part, and the rear lower rod is rotatably connected with the other end part;

the back cross brace assembly comprises two back cross brace rods, wherein one end parts of the two back cross brace rods are rotationally connected, and the other end parts of the two back cross brace rods are respectively rotationally connected with the back lower rods on the corresponding side.

Preferably, the front cross brace assembly further comprises a front cross brace assembly arranged between the front brackets on the left side and the right side, the front cross brace assembly comprises two front cross brace rods with one end parts connected in a rotating mode, and the other end parts of the two front cross brace rods are connected with the front brackets on the corresponding sides in a rotating mode respectively.

Further, the cart frame further comprises a first linkage mechanism for driving the two front cross braces to rotate and fold relatively when the side supports are folded, the first linkage mechanism comprises a first connecting rod, one end portion of the first connecting rod is connected with the front cross braces in a rotating mode through a first shaft, the first shaft extends in the front-back direction, the other end portion of the first connecting rod is connected with the rear upper rods in a rotating mode through a second shaft, and the second shaft extends in the left-right direction.

Further, when the child stroller is in the unfolded state, the rotational connection between the first link and the rear upper rod is located in front of the rotational connection between the lower link and the rear upper rod on the rear upper rod.

Still further, the front cross brace comprises a main brace extending along the left-right direction and a connecting rod with one end fixedly arranged on the main brace, one end of each main brace is rotationally connected, the other end of each main brace is rotationally connected with the front support on the corresponding side, and one end of each first connecting rod is rotationally connected with the other end of each connecting rod.

Preferably, the cart frame further comprises a second linkage mechanism for driving the two rear cross rods to rotate and fold relatively when the side brackets are folded, the second linkage mechanism comprises a second connecting rod, one end of the second connecting rod is connected with the rear cross rods in a rotating mode through a third shaft, the third shaft extends in the front-back direction, the other end of the second connecting rod is connected with the lower connecting rod in a rotating mode through a fourth shaft, and the fourth shaft extends in the left-right direction.

Further, when the child stroller is in the unfolded state, on the lower connecting rod, a rotation connection part of the lower connecting rod and the push rod assembly, a rotation connection part of the lower connecting rod and the rear upper rod, a rotation connection part of the lower connecting rod and the front connecting rod, a rotation connection part of the lower connecting rod and the second connecting rod, and a rotation connection part of the lower connecting rod and the rear pull rod are sequentially arranged from top to bottom.

Preferably, when the child stroller is in the unfolded state, the axial lead of the rotating shaft rotationally connected with the front support by the front connecting rod, the axial lead of the rotating shaft rotationally connected with the lower connecting rod by the front connecting rod, and the axial lead of the rotating shaft rotationally connected with the rear upper rod by the lower connecting rod are located in the same plane.

Preferably, the side bracket further comprises a seat rod and a sliding sleeve sleeved on the seat rod and capable of being arranged in a sliding manner relative to the seat rod, the rear end part of the seat rod is rotatably connected with the upper part of the lower connecting rod, and the sliding sleeve is rotatably connected with the side handrail.

Further, the cross support assembly further comprises a cross support assembly, the cross support assembly comprises two support rods which are crossed and rotate at the crossed position, one end of each support rod is rotatably connected with the rear end of the seat rod on one side, and the other end of each support rod is rotatably connected with the lower connecting rod on the other side.

Preferably, the push rod assembly comprises a lower push rod, a middle push rod which can be arranged on the lower push rod in a sliding manner along the length extending direction of the lower push rod, an upper push rod which can be arranged on the middle push rod in a sliding manner along the length extending direction of the middle push rod, a first locking mechanism for locking the relative positions of the lower push rod and the middle push rod, a second locking mechanism for locking the relative positions of the middle push rod and the upper push rod, a first unlocking mechanism and a first unlocking piece for driving the first locking mechanism to unlock, wherein the first unlocking piece can be rotatably arranged on the upper push rod, and is matched with the first unlocking mechanism, and when the first unlocking mechanism is operated, the first unlocking piece is in a first position and the second locking mechanism is unlocked; when the first unlocking mechanism is released, the first unlocking piece is in a second position; when the first unlocking piece is positioned at the second position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece cannot drive the first locking mechanism to unlock; when the first unlocking piece is positioned at the first position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece can drive the first locking mechanism to unlock.

Further, the first locking mechanism includes a first locking piece slidably provided on one of the middle push rod and the lower push rod and a first locking groove provided on the other, the first locking piece being insertable into or releasable from the first locking groove; when the first unlocking piece is positioned at the second position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece can be abutted to the first locking piece to be matched with the first locking piece, and the first locking piece cannot be driven to slide; when the first unlocking piece is positioned at the first position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece can be propped against the first locking piece to be matched with the first locking piece so as to drive the first locking piece to slide.

Further, an unlocking part is arranged on the first unlocking piece, and a first matching part and a second matching part are respectively arranged on the first locking piece; when the first unlocking piece is positioned at a first position, the position of the unlocking part corresponds to the position of the first matching part, and when the upper push rod slides downwards, the unlocking part is in abutting fit with the first matching part; when the first unlocking piece is positioned at the second position, the position of the unlocking part corresponds to the position of the second matching part, and when the upper push rod slides downwards, the unlocking part is in abutting fit with the second matching part.

Furthermore, the unlocking part is provided with a first inclined plane, the first matching part is provided with a second inclined plane matched with the first inclined plane, and when the first unlocking part is positioned at the first position, the upper push rod slides downwards to be close to the middle push rod, so that the first inclined plane is matched with the second inclined plane in a propping way.

Further, the child stroller further comprises a third locking mechanism for locking the relative positions of the push rod assembly and the lower connecting rod or the side armrests, and a second unlocking mechanism movably arranged on the lower push rod and used for driving the third locking mechanism to unlock, when the middle push rod slides downwards to be close to the lower push rod, the middle push rod can be matched with the second unlocking mechanism, so that the second unlocking mechanism is driven to act, and the third locking mechanism is unlocked.

Still further, the first locking groove sets up respectively the upper and lower both ends portion of push rod down, when children's shallow is in the state of expanding, first locking piece inserts and establishes in being located upper portion in the first locking groove, when well push rod down slide with the push rod down draws close mutually, first locking piece can insert and establish in the first locking groove that is located the lower part, make well push rod can not slide down with second unlocking mechanism cooperatees, makes third locking mechanism can not be unlocked.

Further, the first unlocking mechanism comprises a second unlocking piece which can be slidably arranged in the upper push rod, the second unlocking piece is respectively in propping fit with the first unlocking piece and the second locking mechanism, and when the second unlocking piece is driven to slide relative to the upper push rod to unlock the second locking mechanism, the first unlocking piece rotates from a second position to a first position relative to the upper push rod.

Further, the child stroller further comprises a first elastic member for urging the first unlocking member to rotate from the first position to the second position.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: when the child stroller is unfolded and used, the side brackets on the left side and the right side are unfolded, and the rear transverse support assemblies are unfolded and supported between the rear lower rods on the left side and the right side, so that the child stroller has better rigidity in an unfolded state, the structural stability of the child stroller is better, and the safety of the child stroller can be improved. And the folding baby stroller has compact structure, small volume and convenient carrying and storage.

Drawings

FIG. 1 is a perspective view of a child stroller according to an embodiment in an unfolded state;

FIG. 2 is a second perspective view of the stroller in an unfolded state;

FIG. 3 is a third perspective view of the stroller in an unfolded state;

FIG. 4 is a perspective view of the stroller in an unfolded state;

FIG. 5 is a schematic side view of the stroller in an unfolded state;

FIG. 6 is a schematic cross-sectional view of the push rod assembly of the stroller of the present embodiment in an expanded state;

FIG. 7 is a rotational enlarged schematic view of FIG. 6 with portions of the structure removed;

FIG. 8 is a schematic cross-sectional view of the push rod assembly of the stroller of the present embodiment in a deployed state after the first unlocking mechanism is operated to unlock the second locking mechanism;

FIG. 9 is a rotational enlarged schematic view of FIG. 8 with portions of the structure removed;

FIG. 10 is a schematic cross-sectional view of the push rod assembly of the present embodiment with the upper push rod slid down and the middle push rod closed together (the first locking mechanism in the locked state);

FIG. 11 is an enlarged schematic view of a portion of FIG. 10 at A;

FIG. 12 is a schematic cross-sectional view of the push rod assembly of the present embodiment with the upper push rod slid downward and the middle push rod closed (the first locking mechanism in an unlocked state);

FIG. 13 is an enlarged schematic view of a portion of FIG. 12 at A;

FIG. 14 is a schematic cross-sectional view of the push rod assembly of the present embodiment with the center push rod slid downward and the lower push rod closed together (the first locking mechanism in the locked state);

FIG. 15 is an enlarged schematic view of a portion of FIG. 14 at A;

FIG. 16 is a schematic cross-sectional view of the push rod assembly of the present embodiment with the center push rod slid downward and the lower push rod closed (the first locking mechanism in an unlocked state);

FIG. 17 is an enlarged schematic view of a portion of FIG. 16 at A;

FIG. 18 is a schematic side view of the stroller of the present embodiment during folding;

fig. 19 is a schematic perspective view of the stroller in a folded state according to the present embodiment;

fig. 20 is a front view schematically showing the stroller of the present embodiment in a folded state.

Wherein: 11. a front bracket; 12. a rear bracket assembly; 121. a rear upper rod; 122. a rear lower rod; 13. a push rod assembly; 131. an upper push rod; 132. a middle push rod; 132a, a second locking groove; 133. a push rod is downwards pushed; 1331. a first locking groove; 1332. a second unlocking member; 1332a, a third bevel; 14. a side rail; 15. a lower connecting rod; 16. a front link; 17. a rear pull rod; 18. a seat rod; 19. a sliding sleeve; 21. a front cross brace; 211. a main stay bar; 212. a connecting rod; 22. a rear cross brace; 23. an upper cross brace; 24. a brace rod; 31. a first link; 32. a second link; 401. a first shaft; 402. a second shaft; 403. a third shaft; 404. a fourth shaft; 405. a fifth shaft; 406. a sixth shaft; 407. a seventh axis; 408. an eighth shaft; 409. a ninth axis; 410. a tenth shaft; 411. an eleventh axis; 412. a twelfth axis; 413. a tenth axis; 5. a first locking member; 51. a first mating portion; 511. a second inclined surface; 52. a second mating portion; 61. a second locking member; 611. a main body portion; 611a, a fourth inclined plane; 612. a locking pin; 62. a third elastic member; 7. a third locking member; 81. an unlock button; 82. a second unlocking member; 821. a fifth inclined surface; 83. a traction cable; 91. a first unlocking member; 911. an unlocking part; 911a, a first bevel; 92. a first elastic member; 10. and a second unlocking mechanism.

Detailed Description

The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.

The child stroller of the present invention has an unfolded state and a folded state, as shown in fig. 1 to 5, and includes a stroller frame, a front wheel assembly provided at a bottom front portion of the stroller frame, and a rear wheel assembly provided at a bottom rear portion of the stroller frame.

The cart frame comprises side brackets arranged on the left side and the right side respectively and a transverse strut assembly connected between the side brackets on the left side and the right side.

The side brackets on each side include a front bracket 11, a rear bracket assembly 12, a push rod assembly 13, a side rail 14, a lower link 15, a front link 16, and a rear tie rod 17.

The front wheel assemblies are respectively provided at lower portions of the front brackets 11 at each side.

The rear bracket assembly 12 of each side includes a rear upper bar 121 and a rear lower bar 122, the rear lower bar 122 being slidably disposed on the rear upper bar 121 along a length extension direction of the rear upper bar 121, and the rear wheel assembly being disposed at a lower portion of the rear lower bar 122 of each side, respectively.

The lower portion of the push rod assembly 13 is rotatably coupled to the upper portion of the side rail 14 by a fifth shaft 405.

Two of the lower part of the side arm rest 14, the upper part of the front bracket 11 and the upper part of the rear upper rod 121 are rotatably connected, and a third one is rotatably connected to either one of the above or the above three are coaxially rotatably connected. In the present embodiment, the lower portion of the side rail 14 is rotatably connected to the upper portion of the rear upper lever 121 via the sixth shaft 406, and the upper portion of the front bracket 11 is rotatably connected to the upper portion of the rear upper lever 121 via the seventh shaft 407. When the stroller is in the deployed state, the seventh axle 407 is positioned below the sixth axle 406.

One end of the lower link 15 is rotatably connected to the lower portion of the push rod assembly 13 through an eighth shaft 408, and the lower link 15 is rotatably connected to the rear upper rod 121 through a ninth shaft 409.

One end of the front link 16 is rotatably connected to the front bracket 11 through a tenth shaft 410, and the other end of the front link 16 is rotatably connected to the lower link 15 through an eleventh shaft 411.

One end of the rear link 17 is rotatably connected to the lower portion of the lower link 15 through a twelfth shaft 412, and the other end of the rear link 17 is rotatably connected to the rear lower lever 122 through a thirteenth shaft 413.

The side brackets on each side can also comprise a seat rod 18 and a sliding sleeve 19, the rear end part of the seat rod 18 is rotationally connected with the upper part of the lower connecting rod 15, the sliding sleeve 19 is sleeved on the seat rod 18 and can be slidably arranged relative to the seat rod 18, and the sliding sleeve 19 is rotationally connected with the side armrests 14.

Thus, in the side brackets on each side, a four-bar linkage is formed between the rear upper bar 121, the side rail 14, the push bar assembly 13 and the lower link 15, a four-bar linkage is formed between the front bracket 11, the rear upper bar 121, the lower link 15 and the front link 16, and a slider-crank mechanism is formed between the rear upper bar 121, the rear lower bar 122, the rear tie bar 17 and the lower link 15.

When the stroller is in the unfolded state, the axis of the ninth shaft 409, the axis of the tenth shaft 410 and the axis of the eleventh shaft 411 are located in the same plane. This makes the axle center of the seventh shaft 407, the axle center of the ninth shaft 409, the axle center of the tenth shaft 410 and the axle center of the eleventh shaft 411 in the four-bar linkage formed by the front bracket 11, the rear upper bar 121, the lower link 15 and the front link 16 connected to form a triangle structure, so that the structural rigidity of the stroller in the unfolded state is better.

The stull subassembly includes preceding stull subassembly, back stull subassembly and goes up stull subassembly, and preceding stull subassembly sets up between the fore-stock 11 of left and right sides, and back stull subassembly sets up between the back lower limb 122 of left and right sides, goes up the stull subassembly and sets up between push rod subassembly 13 of left and right sides.

The front cross brace assembly comprises two front cross brace rods 21, one end parts of the two front cross brace rods 21 are rotatably connected, and the other end parts of the two front cross brace rods 21 are respectively rotatably connected with the front support 11 on the corresponding side.

The rear cross brace assembly comprises two rear cross braces 22, one end parts of the two rear cross braces 22 are rotatably connected, and the other end parts of the two rear cross braces 22 are respectively rotatably connected with the rear lower rods 122 on the corresponding sides.

The upper cross brace assembly comprises two upper cross brace rods 23, one end parts of the two upper cross brace rods 23 are rotatably connected, and the other end parts of the two upper cross brace rods 23 are rotatably connected with the upper parts of the push rod assemblies 13 on the corresponding sides respectively.

The cross brace assembly may further include a cross brace assembly disposed between the left and right side brackets, the cross brace assembly including two cross braces 24 rotating at the cross, one end of each brace 24 being rotatably connected to the rear end of the seat bar 18 on one side, and the other end of each brace 24 being rotatably connected to the lower link 15 on the other side.

The transverse support assembly is arranged in this way, so that the structural rigidity of the child stroller in the unfolded state can be improved, and the safety of the child stroller in use can be improved.

The trolley frame also comprises a first linkage mechanism and a second linkage mechanism, wherein the first linkage mechanism and the second linkage mechanism are respectively arranged at the left side and the right side, when the side brackets at each side are folded in the folding process of the trolley, the first linkage mechanisms at the two sides can drive the two front transverse supporting rods 21 to rotate relatively for folding, and the second linkage mechanisms at the two sides drive the two rear transverse supporting rods 22 to rotate relatively for folding, so that the side brackets at the left side and the right side are close to enable the trolley to be folded longitudinally and transversely at the same time, and the trolley is convenient to fold.

The first link mechanism includes a first link 31, one end of the first link 31 is rotatably connected to the front cross bar 21 through a first shaft 401, the other end of the first link 31 is rotatably connected to the rear upper bar 121 through a second shaft 402, the first shaft 401 extends in the front-rear direction, and the second shaft 402 extends in the left-right direction. On the rear upper bar 121, the second axle 402 is located in front of the ninth axle 409 when the stroller is in the unfolded state.

In this embodiment, the front cross brace 21 includes a main brace 211 extending in the left-right direction and a connecting rod 212 having one end portion fixedly provided on the main brace 211, one end portions of the two main braces 211 are rotatably connected, the other end portions of the two main braces 211 are rotatably connected with the front bracket 11 on the corresponding side, respectively, and one end portion of the first connecting rod 31 is rotatably connected with the other end portion of the connecting rod 212 through a first shaft 401.

The second link mechanism includes a second link 32, one end of the second link 32 is rotatably connected to the rear cross bar 22 through a third shaft 403, and the other end of the second link 32 is rotatably connected to the lower link 15 through a fourth shaft 404. The third shaft 403 extends in the front-rear direction, and the fourth shaft 404 extends in the left-right direction. When the stroller is in the unfolded state, the eighth shaft 408, the ninth shaft 409, the eleventh shaft 411, the fourth shaft 404, and the twelfth shaft 412 are disposed in this order from the top down on the lower link 15.

As shown in fig. 1, 2, 5, 6 and 8, the push rod assembly includes an upper push rod 131, a middle push rod 132 and a lower push rod 133. The middle push rod 132 is slidably disposed on the lower push rod 133 along the length extending direction of the lower push rod 133, the upper push rod 131 is slidably disposed on the middle push rod 132 along the length extending direction of the middle push rod 132, the other ends of the two upper cross braces 23 are respectively rotatably connected with the upper portions of the upper push rods 131 on the corresponding sides, and the side handrails 14 and the lower links 15 are respectively rotatably connected with the lower portions of the lower push rods 133. In this embodiment, each of the upper push rod 131, the middle push rod 132, and the lower push rod 133 has a lumen extending in the longitudinal direction thereof, the middle push rod 132 is slidably disposed in the lumen of the lower push rod 133, and the upper push rod 131 is slidably disposed in the lumen of the middle push rod 132.

When the stroller is in the unfolded state, the upper push rod 131 protrudes upward mostly outside the lumen of the middle push rod 132, and the middle push rod 132 protrudes upward mostly outside the lumen of the lower push rod 133, as shown in fig. 1, 2 and 5. When the stroller is in the collapsed condition, the upper push rod 131 is mostly retracted into the lumen of the middle push rod 132, and the middle push rod 132 is mostly retracted into the lumen of the lower push rod 133, as shown in fig. 19 and 20.

The stroller further comprises a first locking mechanism for locking the relative positions of the center pushrod 132 and the lower pushrod 133. When the first locking mechanism is in the locked state, the middle push rod 132 and the lower push rod 133 cannot slide relatively. When the first locking mechanism is in the unlocked state, the middle push rod 132 can slide relative to the lower push rod 133.

The first locking mechanism includes a first locking piece 5 slidably provided on one of the middle push rod 132 and the lower push rod 133 and a first locking groove 1331 provided on the other. When the first locking mechanism is in the locked state, the first locking piece 5 is inserted in the first locking groove 1331 so that the middle push rod 132 and the lower push rod 133 cannot slide relatively, as shown in fig. 10, 11, 14 and 15. When the first locking mechanism is in the unlocked state, the first locking piece 5 is disengaged from the first locking groove 1331, so that the middle push rod 132 can slide with respect to the lower push rod 133, as shown in fig. 12, 13, 16 and 17. In this embodiment, the first locking member 5 is slidably disposed in the lumen of the middle push rod 132, and the first locking groove 1331 is disposed on the lower push rod 133, so that the first locking member 5 can be inserted into the first locking groove 1331 or removed from the first locking groove 1331 by sliding the first locking member 5 relative to the middle push rod 12.

The push rod assembly further includes a second elastic member (not shown) having an elastic force for driving the first locking member 5 to slide in a direction of being inserted into the first locking groove 1331.

The stroller further comprises a second locking mechanism for locking the relative positions of the upper 131 and middle 132 push rods. When the second locking mechanism is in the locked state, the upper push rod 131 and the middle push rod 132 cannot slide relatively. When the first locking mechanism is in the unlocked state, the upper push rod 131 can slide relative to the middle push rod 132.

The second locking mechanism includes a second locking piece 61 movably provided on the upper push rod 131 and a second locking groove 132a provided on the middle push rod 132. The second locking member 61 includes a body portion 611 and a locking pin 612, the body portion 611 having elasticity, the locking pin 612 being provided at one end portion of the body portion 611. When the second locking mechanism is in the locked state, the locking pin 612 is inserted in the second locking groove 132a so that the upper push rod 131 and the middle push rod 132 cannot slide relatively, as shown in fig. 6 and 7. When the second locking mechanism is in the unlocked state, the locking pin 612 is disengaged from the second locking groove 132a, thereby enabling the upper push rod 131 to slide with respect to the middle push rod 132, as shown in fig. 8 and 9. By swinging the body portion 611 relative to the push-up lever 131, the lock pin 612 can be inserted into the second lock groove 132a or removed from the second lock groove 132a.

The stroller further includes a third elastic member 62, and the elastic force of the third elastic member 62 is used to drive the second locking member 61 to swing in a direction in which the locking pin 612 is inserted into the second locking groove 132 a.

The stroller further comprises a third locking mechanism for locking the relative position of the push down bar 133 and the side rails 14 or the lower links 15, when the third locking mechanism is in the locked state, the position of the entire stroller frame is locked. The third locking mechanism may employ a structure in the related art, such as the third locking mechanism including the third locking piece 7 slidably provided between the push down lever 133 and the side rail 14 or the lower link 15, the third locking piece 7 having locking teeth, as shown in fig. 6, 8, 10, 12, 14 and 16. The side arm rest 14 or the lower link 15 and the lower push rod 133 are provided with tooth grooves capable of being engaged with the locking teeth. When the third locking mechanism is in the locked state, the locking teeth engage with the tooth grooves on the side rail 14 or the lower link 15 and the lower push rod 133, respectively. When the third locking mechanism is in the unlocked state, the locking teeth are engaged with the tooth grooves on one of the side rail 14 or the lower link 15 and the lower push rod 133, and are disengaged from the engagement of the tooth grooves of the other.

The stroller further includes a first unlocking mechanism, which when operated in a locked state, can actuate the second locking mechanism to unlock, so that the upper push rod 131 can slide downward to be close to the middle push rod 132.

Specifically, as shown in fig. 6 to 9, the first unlocking mechanism includes an unlocking button 81, a second unlocking piece 82, and a traction cable 83. The unlocking button 81 and the second unlocking member 82 are slidably arranged on the upper push rod 131, the second unlocking member 82 is accommodated in the cavity of the upper push rod 131, and the unlocking button 81 partially extends out of the upper push rod 131 so as to be operated by a human hand during unlocking. One end of the pulling rope 83 is directly or indirectly provided on the unlocking button 81, and the other end of the pulling rope 83 is provided on the second unlocking piece 82. The second unlocking member 82 is in abutting engagement with the second locking member 61, in this embodiment, a fourth inclined surface 611a is provided on the body 611 of the second locking member 61, a fifth inclined surface 821 corresponding to the fourth inclined surface 611a is provided on the second unlocking member 82, the fourth inclined surface 611a and the fifth inclined surface 821 are both obliquely intersected with the sliding direction of the second unlocking member 82, and the fourth inclined surface 611a is in abutting engagement with the fifth inclined surface 821.

When the second locking mechanism operates the unlocking button 81 in the locked state, the pulling rope 83 pulls the second unlocking member 82 to slide upwards, and the body 611 of the second locking member 61 swings relative to the upper push rod 131 through the abutting engagement of the fourth inclined surface 611a and the fifth inclined surface 821, so that the locking pin 612 is disengaged from the second locking groove 132a, the second locking mechanism is unlocked, and the upper push rod 131 can slide downwards relative to the middle push rod 132 to be close to the middle push rod 132.

The child stroller further includes a first unlocking piece 91, and the first unlocking piece 91 is disposed at a lower portion of the upper push rod 131. When the stroller is in the unfolded state, the first unlocking member 91 is away from the first locking member 5, as shown in fig. 6 and 8. When the upper push rod 131 slides downwards relative to the middle push rod 132 and approaches the middle push rod 132, the first unlocking piece 91 can be matched with the first locking piece 5, so that when the upper push rod 131 slides downwards, the first locking piece 5 can slide in the direction of being separated from the first locking groove 1331, and the first locking mechanism is unlocked, so that the unlocking operation of the first locking mechanism is convenient.

The first unlocking member 91 is rotatably provided at a lower portion of the upper push rod 131, and the first unlocking member 91 rotates with respect to the upper push rod 131 to have a first position and a second position.

The first unlocking piece 91 is abutted against the lower end portion of the second unlocking piece 82. When the unlocking button 81 is operated to unlock the second locking mechanism, the first unlocking member 91 is driven to rotate to the first position relative to the push-up lever 131 by the cooperation of the first unlocking member 91 and the second unlocking member 82, as shown in fig. 8, 9, 12, 13, 16 and 17.

When the unlocking button 81 is released, the first unlocking member 91 is reversely rotated by the elastic force of the first elastic member 92, thereby being rotated from the first position to the second position, as shown in fig. 6, 7, 10, 11, 14 and 15. In this embodiment, the first elastic member 92 employs a torsion spring, one end of which is provided on the first unlocking member 91, and the other end of which is provided on the upper push rod 131.

When the upper push rod 131 of the first unlocking member 91 is in the first position, the first unlocking member 91 can be matched with the first locking member 5, so that the first locking member 5 slides in the direction of being separated from the first locking groove 1331, and the first locking mechanism is unlocked.

When the upper push rod 131 slides downward at the second position of the first unlocking member 91, the first locking member 5 cannot slide relative to the middle push rod 132, so that the first locking mechanism cannot be unlocked, and the locked state is maintained. Thus, when the child stroller is in use, after the unlocking button 81 is operated by mistake to unlock the second locking mechanism, the upper push rod 131 can slide downwards relative to the middle push rod 132 to be close to the middle push rod 132, and when the unlocking button 81 is released, the first unlocking member 91 is in the second position under the action of the elastic force of the first elastic member 92, and when the upper push rod 131 slides downwards relative to the middle push rod 132 for a certain distance, the first unlocking member 91 abuts against the first locking member 5, so that the upper push rod 131 cannot slide downwards, and the first locking member 5 cannot slide relative to the middle push rod 132 to keep the first locking mechanism in a locked state, so that the middle push rod 132 cannot slide downwards, and the sunshade can be prevented from sliding downwards to collide with a child riding in the child stroller.

Specifically, the first unlocking member 91 is provided with an unlocking portion 911, and the first locking member 5 is provided with a first mating portion 51 and a second mating portion 52, respectively, and the distance between the first mating portion 51 and the unlocking portion 911 is greater than the distance between the second mating portion 52 and the unlocking portion 911. When the first unlocking piece 91 is at the first position, the position of the unlocking portion 911 corresponds to the position of the first engaging portion 51, as shown in fig. 12, 13, 16, and 17; when the first unlocking member 91 is at the second position, the position of the unlocking portion 911 corresponds to the position of the second engaging portion 52, as shown in fig. 10, 11, 14, and 15.

In this embodiment, the second engaging portion 52 is an upper end surface of the first locking member 5, and when the upper push rod 131 slides downward to make the unlocking portion 911 abut against the upper end surface of the first locking member 5, as shown in fig. 10, 11, 14 and 15, the upper push rod 131 cannot slide downward due to the blocking of the first locking member 5, and the first locking member 5 cannot slide.

In this embodiment, the first engaging portion 51 is a recess recessed from the upper end surface of the first locking member 5. The unlocking portion 911 has a first inclined surface 911a, and one side surface of the first engaging portion 51, i.e., the groove, is a second inclined surface 511 that matches the first inclined surface 911 a. When the upper push rod 131 slides downward to make the unlocking portion 911 enter the groove, the first inclined surface 911a is engaged against the second inclined surface 511, as shown in fig. 12, 13, 16 and 17. This allows the upper push rod 131 to continue to slide downwardly in close proximity to the middle push rod 132 and allows the first locking member 5 to slide in a direction out of the first locking slot 1331 until the upper push rod 131 slides downwardly in place while the first locking mechanism is unlocked.

That is, when the first locking mechanism needs to be unlocked when the stroller frame is folded, the unlocking button 81 needs to be operated during the downward sliding of the upper push rod 131, so that the first unlocking member 91 is driven to move to the first position by the second unlocking member 82.

As shown in fig. 14 to 17, the stroller further includes a second unlocking mechanism 10, and the second unlocking mechanism 10 is used for unlocking the third locking mechanism. The second unlocking mechanism 10 is movably arranged in the pipe cavity of the lower push rod 133, when the middle push rod 132 slides downwards to be close to the lower push rod 133, the lower part of the middle push rod 132 can prop against the second unlocking mechanism 10, so that the second unlocking mechanism 10 acts, and then the third locking mechanism is unlocked, the unlocking operation of the third locking mechanism is convenient, and the folding of the stroller is convenient. The manner in which unlocking of the third locking mechanism is actuated by the second unlocking mechanism 10 may employ a structure in the prior art.

The first locking grooves 1331 are provided at the upper and lower end portions of the push down lever 133, respectively, and when the stroller is in the unfolded state, the first locking piece 5 is inserted into the first locking groove 1331 located at the upper portion of the push down lever 133, thereby putting the first locking mechanism in the locked state. When the unlocking button 81 is released while the push rod 132 is slid down to be brought close to the lower push rod 133, the first locking piece 5 can also be inserted into the first locking groove 1331 provided at the lower portion of the lower push rod 133, so that the first locking mechanism can be locked again.

When the unlocking button 81 is released while the middle push rod 132 is slid downward, the first unlocking member 91 is in the second position by the elastic force of the first elastic member 92. When the middle push rod 132 slides down to the position of the first locking piece 5 corresponding to the first locking groove 1331 of the lower portion of the lower push rod 133 at this time, the first locking piece 5 is automatically inserted into the first locking groove 1331 under the elastic force of the second elastic piece, so that the positions of the middle push rod 132 and the lower push rod 133 are locked, and the middle push rod 132 cannot slide down further, as shown in fig. 14 and 15. At this time, a space is provided between the lower portion of the middle push rod 132 and the second unlocking mechanism 10, and the second unlocking mechanism 10 cannot be driven to operate, so that the third locking mechanism still maintains the locked state. This can avoid unlocking the third locking mechanism when the middle push rod 132 is slid down by a misoperation, thereby folding the stroller frame, which can improve the safety performance of the child stroller.

When the third locking mechanism needs to be unlocked when the stroller is folded, the unlocking button 81 is operated, the second unlocking piece 82 drives the first unlocking piece 91 to move to the first position, the middle push rod 132 can slide downwards continuously, the unlocking part 911 enters the groove, the first inclined plane 911a is matched with the second inclined plane 511 in a propping mode, the middle push rod 132 can slide downwards continuously to be close to the lower push rod 133, the first locking piece 5 can slide in the direction of being separated from the first locking groove 1331 until the middle push rod 132 slides downwards to be in place, and the first locking mechanism is unlocked, as shown in fig. 16 and 17. During the process that the middle push rod 132 continues to slide downwards, the lower part of the middle push rod 132 can abut against the second unlocking mechanism 10 to enable the second unlocking mechanism 10 to act, so that the third locking mechanism is unlocked.

As shown in fig. 14 to 17, the stroller further includes a third unlocking member 1332, where the third unlocking member 1332 is fixedly disposed on the lower push rod 133 and is located at the position of the first locking slot 1331 at the lower portion of the lower push rod 133. The third unlocking piece 1332 is provided with a third inclined surface 1332a, and when the first locking piece 5 is inserted into the first locking groove 1331 positioned at the lower part of the lower push rod 133, the first locking piece 5 is abutted against the third inclined surface 1332a for matching. When the middle push rod 132 slides down to the first locking groove 1331 at the lower part of the lower push rod 133, and the middle push rod 132 is pulled up, the first locking piece 5 slides in the direction of being separated from the first locking groove 1331 due to the abutting fit of the first locking piece 5 and the third inclined surface 1332a, so that the first locking mechanism is unlocked, and the middle push rod 132 can be pulled to slide up for resetting.

When the child stroller is in the deployed state, the first, second and third locking mechanisms are all in the locked state, as shown in fig. 1-5.

When the child stroller is folded from the unfolded state, the first unlocking mechanism is operated to unlock the second locking mechanism, the upper push rod 131 slides downwards to be close to the middle push rod 132, the first locking mechanism is unlocked, the middle push rod 132 slides downwards to be close to the lower push rod 133, and the third locking mechanism is unlocked. The push rod assembly 13 is integrally rotated downward and forward to be close to the side handrail 14, so that the side handrail 14 and the lower connecting rod 15 are both rotated downward, and accordingly the front bracket 11 is pulled to be rotated backward to be close to the rear bracket assembly 12 through the front connecting rod 16, and the rear lower rod 122 is pulled to be moved upward relative to the rear upper rod 121 to be close to the rear upper rod 121 through the rear pull rod 17. In this process, the front cross bar 21 is pulled to rotate by the first link 31, and the rear cross bar 22 is pulled to rotate by the second link 32, so that the side brackets on the left and right sides are closed together, and the folding process is shown in fig. 18. Until the components making up the stroller are all brought together and finally folded as shown in fig. 19 and 20. The folding baby stroller has compact structure, small volume and convenient carrying and storage.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims (18)

1. The utility model provides a children's shallow, includes the shallow frame that has expansion state and folding state, the shallow frame is including setting up respectively in the side support of left and right sides and connect in the left and right sides between the side support the stull subassembly, its characterized in that: the side brackets on each side each include:

the front wheel assembly is arranged at the lower part of the front bracket;

the rear bracket assembly comprises a rear upper rod and a rear lower rod which can be arranged on the rear upper rod in a sliding manner along the length extension direction of the rear upper rod, and the rear wheel assembly is arranged at the lower part of the rear lower rod;

a push rod assembly;

a side armrest, the upper part of which is rotationally connected with the lower part of the push rod assembly, the lower part of the side armrest, the upper part of the front bracket and the upper part of the rear upper rod are rotationally connected, and a third one is rotationally connected with any one of the above three or coaxially rotationally connected with the above three;

The upper part of the lower connecting rod is rotationally connected with the lower part of the push rod assembly, and the lower connecting rod is rotationally connected with the rear upper rod;

the front connecting rod is rotatably connected with the front bracket at one end part, and is rotatably connected with the lower connecting rod at the other end part;

the rear pull rod is rotatably connected with the lower part of the lower connecting rod at one end part, and the rear lower rod is rotatably connected with the other end part;

the back cross brace assembly comprises two back cross brace rods, wherein one end parts of the two back cross brace rods are rotationally connected, and the other end parts of the two back cross brace rods are respectively rotationally connected with the back lower rods on the corresponding side.

2. The stroller of claim 1, wherein: the front cross brace assembly comprises two front cross brace rods, wherein one end parts of the two front cross brace rods are rotationally connected, and the other end parts of the two front cross brace rods are respectively rotationally connected with the front brackets on the corresponding sides.

3. The stroller of claim 2, wherein: the cart frame also comprises a first linkage mechanism for driving the two front cross braces to rotate and fold relatively when the side brackets are folded, the first linkage mechanism comprises a first connecting rod, one end part of the first connecting rod is connected with the front cross braces through a first shaft in a rotating mode, the first shaft extends in the front-back direction, the other end part of the first connecting rod is connected with the rear upper rods through a second shaft in a rotating mode, and the second shaft extends in the left-right direction.

4. A stroller according to claim 3, wherein: when the child stroller is in the unfolded state, on the rear upper rod, the rotation connection part of the first connecting rod and the rear upper rod is positioned in front of the rotation connection part of the lower connecting rod and the rear upper rod.

5. A stroller according to claim 3, wherein: the front cross brace comprises a main brace extending along the left-right direction and a connecting rod with one end part fixedly arranged on the main brace, one end parts of the two main brace are rotationally connected, the other end parts of the two main brace are respectively rotationally connected with the front support on the corresponding side, and one end part of the first connecting rod is rotationally connected with the other end part of the connecting rod.

6. The stroller of claim 1, wherein: the cart frame also comprises a second linkage mechanism for driving the two rear cross rods to rotate relatively and fold when the side brackets are folded, the second linkage mechanism comprises a second connecting rod, one end part of the second connecting rod is connected with the rear cross rods in a rotating way through a third shaft, the third shaft extends along the front-back direction, the other end part of the second connecting rod is connected with the lower connecting rod in a rotating way through a fourth shaft, and the fourth shaft extends along the left-right direction.

7. The stroller of claim 6, wherein: when the child stroller is in the unfolded state, on the lower connecting rod, the rotation connection part of the lower connecting rod and the push rod assembly, the rotation connection part of the lower connecting rod and the rear upper rod, the rotation connection part of the lower connecting rod and the front connecting rod, the rotation connection part of the lower connecting rod and the second connecting rod and the rotation connection part of the lower connecting rod and the rear pull rod are sequentially arranged from top to bottom.

8. The stroller of claim 1, wherein: when the child stroller is in the unfolded state, the axial lead of the rotating shaft which is rotationally connected with the front support, the axial lead of the rotating shaft which is rotationally connected with the front connecting rod and the lower connecting rod, and the axial lead of the rotating shaft which is rotationally connected with the lower connecting rod and the rear upper rod are positioned in the same plane.

9. The stroller of claim 1, wherein: the side support further comprises a seat rod and a sliding sleeve which is sleeved on the seat rod and can be arranged in a sliding mode relative to the seat rod, the rear end portion of the seat rod is rotatably connected with the upper portion of the lower connecting rod, and the sliding sleeve is rotatably connected with the side handrail.

10. The stroller of claim 9, wherein: the cross brace assembly further comprises a cross brace assembly, the cross brace assembly comprises two cross brace rods which are crossed and rotate at the crossed position, one end portion of each brace rod is rotatably connected with the rear end portion of one side of the seat rod, and the other end portion of each brace rod is rotatably connected with the lower connecting rod at the other side.

11. The stroller of claim 1, wherein: the push rod assembly comprises a lower push rod, a middle push rod which can be arranged on the lower push rod in a sliding manner along the length extending direction of the lower push rod, an upper push rod which can be arranged on the middle push rod in a sliding manner along the length extending direction of the middle push rod, a first locking mechanism for locking the relative positions of the lower push rod and the middle push rod, a second locking mechanism for locking the relative positions of the middle push rod and the upper push rod, a first unlocking mechanism and a first unlocking piece for driving the first locking mechanism to unlock, wherein the first unlocking piece can be rotatably arranged on the upper push rod, and the first unlocking piece is matched with the first unlocking mechanism, and is positioned at a first position and unlocked when the first unlocking mechanism is operated; when the first unlocking mechanism is released, the first unlocking piece is in a second position; when the first unlocking piece is positioned at the second position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece cannot drive the first locking mechanism to unlock; when the first unlocking piece is positioned at the first position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece can drive the first locking mechanism to unlock.

12. The stroller of claim 11, wherein: the first locking mechanism comprises a first locking piece and a first locking groove, wherein the first locking piece is slidably arranged on one of the middle push rod and the lower push rod, and the first locking piece is arranged on the other, and can be inserted into the first locking groove or can be separated from the first locking groove; when the first unlocking piece is positioned at the second position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece can be abutted to the first locking piece to be matched with the first locking piece, and the first locking piece cannot be driven to slide; when the first unlocking piece is positioned at the first position and the upper push rod slides downwards to be close to the middle push rod, the first unlocking piece can be propped against the first locking piece to be matched with the first locking piece so as to drive the first locking piece to slide.

13. The stroller of claim 12, wherein: the first unlocking piece is provided with an unlocking part, and the first locking piece is respectively provided with a first matching part and a second matching part; when the first unlocking piece is positioned at a first position, the position of the unlocking part corresponds to the position of the first matching part, and when the upper push rod slides downwards, the unlocking part is in abutting fit with the first matching part; when the first unlocking piece is positioned at the second position, the position of the unlocking part corresponds to the position of the second matching part, and when the upper push rod slides downwards, the unlocking part is in abutting fit with the second matching part.

14. The stroller of claim 13, wherein: the unlocking part is provided with a first inclined plane, the first matching part is provided with a second inclined plane matched with the first inclined plane, and when the first unlocking part is positioned at a first position, the upper push rod slides downwards to be close to the middle push rod, so that the first inclined plane is matched with the second inclined plane in a propping way.

15. The stroller of claim 12, wherein: the child stroller further comprises a third locking mechanism for locking the relative positions of the push rod assembly and the lower connecting rod or the side armrests and a second unlocking mechanism movably arranged on the lower push rod and used for driving the third locking mechanism to unlock, and when the middle push rod slides downwards to be close to the lower push rod, the middle push rod can be matched with the second unlocking mechanism so as to drive the second unlocking mechanism to act to unlock the third locking mechanism.

16. The stroller of claim 15, wherein: the first locking groove is respectively arranged at the upper end part and the lower end part of the lower push rod, when the child stroller is in a unfolding state, the first locking piece is inserted into the first locking groove at the upper part, and when the middle push rod slides downwards to be close to the lower push rod, the first locking piece can be inserted into the first locking groove at the lower part, so that the middle push rod cannot slide downwards to be matched with the second unlocking mechanism, and the third locking mechanism cannot be unlocked.

17. The stroller of claim 11, wherein: the first unlocking mechanism comprises a second unlocking piece which can be arranged in the upper push rod in a sliding mode, the second unlocking piece is respectively matched with the first unlocking piece and the second locking mechanism in a propping mode, and when the second unlocking piece is driven to slide relative to the upper push rod to unlock the second locking mechanism, the first unlocking piece rotates from a second position to a first position relative to the upper push rod.

18. The stroller of claim 11, wherein: the stroller further comprises a first resilient member for urging the first unlocking member to rotate from a first position to a second position.