A child stroller

Abstract

The present invention discloses a stroller, comprising a stroller frame having an expanded state and a folded state, the stroller frame comprising side supports and a cross brace assembly, the side supports comprising a front support, a rear support assembly, a push rod assembly, side armrests, a lower connecting rod, a front connecting rod, and a rear pull rod, the rear support assembly comprising a rear upper rod and a rear lower rod connected in a sliding manner, the side armrests being rotatably connected to the push rod assembly, two of the side armrests, the front support, and the rear upper rod being rotatably connected, a third being rotatably connected to either of the two aforementioned, or the three being coaxially rotatably connected, the lower connecting rod being rotatably connected to the push rod assembly and the rear upper rod, respectively, the two ends of the front connecting rod being rotatably connected to the front support and the lower connecting rod, respectively, the two ends of the rear pull rod being rotatably connected to the lower connecting rod and the rear lower rod, and the cross brace assembly comprising a rear cross brace assembly disposed between the rear lower rods on both sides. The stroller has good rigidity in the expanded state and is compact and small in size when folded, making it easy to carry and store.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a children's stroller. Background Art

[0002] Strollers, as a common children's product, play a vital role when parents travel with their children. When not in use, they need to be folded and stored. However, some existing strollers suffer from insufficient structural rigidity when unfolded and still have a relatively large volume when folded. Summary of the Invention

[0003] The object of the present invention is to address the deficiencies in the prior art and to provide a child stroller which has good structural rigidity when unfolded and a small structural volume when folded.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A child stroller includes a stroller frame having an unfolded state and a folded state, the stroller frame including side supports respectively provided on left and right sides and a cross brace assembly connected between the side supports on the left and right sides, wherein the side supports on each side include:

[0006] A front bracket, wherein the front wheel assembly is arranged at the lower portion of the front bracket;

[0007] The rear support assembly includes a rear upper rod and a rear lower rod slidably arranged on the rear upper rod along the longitudinal extension direction of the rear upper rod, and the rear wheel assembly is arranged at the lower part of the rear lower rod;

[0008] Push rod assembly;

[0009] a side armrest, wherein the upper portion of the side armrest is rotatably connected to the lower portion of the push rod assembly, two of the lower portion of the side armrest, the upper portion of the front bracket, and the upper portion of the rear upper rod are rotatably connected, the third is rotatably connected to either of the aforementioned two, or the aforementioned three are coaxially rotatably connected;

[0010] a lower connecting rod, the upper portion of which is rotatably connected to the lower portion of the push rod assembly, and the lower connecting rod is rotatably connected to the rear upper rod;

[0011] a front connecting rod, one end of the front connecting rod being rotatably connected to the front bracket, and the other end of the front connecting rod being rotatably connected to the lower connecting rod;

[0012] a rear pull rod, one end of which is rotatably connected to the lower portion of the lower connecting rod, and the other end of which is rotatably connected to the rear lower rod;

[0013] The cross brace assembly includes a rear cross brace assembly arranged between the rear lower rods on the left and right sides, and the rear cross brace assembly includes two rear cross brace rods rotatably connected at one end, and the other ends of the two rear cross brace rods are respectively rotatably connected to the rear lower rod on the corresponding side.

[0014] Preferably, the cross brace assembly also includes a front cross brace assembly arranged between the front brackets on the left and right sides, and the front cross brace assembly includes two front cross brace rods rotatably connected at one end, and the other ends of the two front cross brace rods are respectively rotatably connected to the front bracket on the corresponding side.

[0015] Furthermore, the cart frame also includes a first linkage mechanism that drives the two front cross braces to rotate and fold relative to each other when the side bracket is folded. The first linkage mechanism includes a first connecting rod, one end of the first connecting rod is rotatably connected to the front cross brace through a first axis, the first axis extends in the front-to-back direction, and the other end of the first connecting rod is rotatably connected to the rear upper rod through a second axis, and the second axis extends in the left-right direction.

[0016] Furthermore, when the stroller is in the unfolded state, on the rear upper rod, the rotational connection between the first connecting rod and the rear upper rod is located in front of the rotational connection between the lower connecting rod and the rear upper rod.

[0017] Furthermore, the front cross support rod includes a main support rod extending in the left and right directions and a connecting rod with one end fixed on the main support rod. One end of the two main support rods are rotatably connected, and the other end of the two main support rods are respectively rotatably connected to the front bracket on the corresponding side, and one end of the first connecting rod is rotatably connected to the other end of the connecting rod.

[0018] Preferably, the cart frame also includes a second linkage mechanism that drives the two rear cross braces to rotate and fold relative to each other when the side bracket is folded, and the second linkage mechanism includes a second connecting rod, one end of the second connecting rod is rotatably connected to the rear cross brace through a third axis, and the third axis extends in the front-to-back direction, and the other end of the second connecting rod is rotatably connected to the lower connecting rod through a fourth axis, and the fourth axis extends in the left-right direction.

[0019] Furthermore, when the stroller is in the unfolded state, on the lower connecting rod, the rotation connection between the lower connecting rod and the push rod assembly, the rotation connection between the lower connecting rod and the rear upper rod, the rotation connection between the lower connecting rod and the front connecting rod, the rotation connection between the lower connecting rod and the second connecting rod, and the rotation connection between the lower connecting rod and the rear pull rod are arranged in sequence from top to bottom.

[0020] Preferably, when the stroller is in the unfolded state, the axis of the rotating shaft that the front link is rotatably connected to the front bracket, the axis of the rotating shaft that the front link is rotatably connected to the lower link, and the axis of the rotating shaft that the lower link is rotatably connected to the rear upper rod are located in the same plane.

[0021] Preferably, the side bracket further comprises a seat post and a sliding sleeve which is sleeved on the seat post and can slide relative to the seat post, the rear end of the seat post is rotatably connected to the upper part of the lower connecting rod, and the sliding sleeve is rotatably connected to the side armrest.

[0022] Furthermore, the cross brace assembly also includes a cross brace assembly, which includes two brace rods that are cross-shaped and rotate at the intersection, one end of each brace rod is rotatably connected to the rear end of the seat rod on one side, and the other end of each brace rod is rotatably connected to the lower connecting rod on the other side.

[0023] Preferably, the push rod assembly includes a lower push rod, a middle push rod that can be slidably arranged on the lower push rod along the length extension direction of the lower push rod, an upper push rod that can be slidably arranged on the middle push rod along the length extension 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 member for driving the first locking mechanism to unlock, the first unlocking member can be rotatably arranged on the upper push rod, the first unlocking member cooperates with the first unlocking mechanism, when the first unlocking mechanism is operated, the first unlocking member is in the first position, and the second locking mechanism is unlocked; when the first unlocking mechanism is released, the first unlocking member is in the second position; when the first unlocking member is in the second position, the upper push rod slides downward and approaches the middle push rod, and the first unlocking member cannot drive the first locking mechanism to unlock; when the first unlocking member is in the first position, the upper push rod slides downward and approaches the middle push rod, and the first unlocking member can drive the first locking mechanism to unlock.

[0024] Furthermore, the first locking mechanism includes a first locking piece that can be 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 can be inserted into the first locking groove or disengaged from the first locking groove; when the first unlocking piece is in the second position and the upper push rod slides downward and approaches the middle push rod, the first unlocking piece can cooperate with the first locking piece and cannot drive the first locking piece to slide; when the first unlocking piece is in the first position and the upper push rod slides downward and approaches the middle push rod, the first unlocking piece can cooperate with the first locking piece and drive the first locking piece to slide.

[0025] Furthermore, an unlocking portion is provided on the first unlocking member, and a first matching portion and a second matching portion are respectively provided on the first locking member; when the first unlocking member is in the first position, the position of the unlocking portion corresponds to the position of the first matching portion, and when the upper push rod slides downward, the unlocking portion is pressed against and matched with the first matching portion; when the first unlocking member is in the second position, the position of the unlocking portion corresponds to the position of the second matching portion, and when the upper push rod slides downward, the unlocking portion is pressed against and matched with the second matching portion.

[0026] Furthermore, the unlocking portion has a first inclined surface, and the first matching portion has a second inclined surface matching the first inclined surface. When the first unlocking member is in the first position, the upper push rod slides downward and approaches the middle push rod, so that the first inclined surface and the second inclined surface can be abutted and matched.

[0027] Furthermore, the stroller also includes a third locking mechanism for locking the relative position of the push rod assembly and the lower connecting rod or the side armrest, and a second unlocking mechanism movably arranged on the lower push rod for driving the third locking mechanism to unlock. When the middle push rod slides downward and approaches the lower push rod, the middle push rod can cooperate with the second unlocking mechanism to drive the second unlocking mechanism to unlock the third locking mechanism.

[0028] Furthermore, the first locking grooves are respectively provided at the upper and lower ends of the lower push rod. When the stroller is in the unfolded state, the first locking piece is inserted into the first locking groove located at the upper portion. When the middle push rod slides downward and approaches the lower push rod, the first locking piece can be inserted into the first locking groove located at the lower portion, so that the middle push rod cannot slide downward and cooperate with the second unlocking mechanism, so that the third locking mechanism cannot be unlocked.

[0029] Furthermore, the first unlocking mechanism includes a second unlocking member that can be slidably arranged in the upper push rod, and the second unlocking member is respectively cooperated with the first unlocking member and the second locking mechanism. When the second unlocking member is driven to slide relative to the upper push rod to unlock the second locking mechanism, the first unlocking member rotates from the second position to the first position relative to the upper push rod.

[0030] Furthermore, the child stroller further includes a first elastic member for driving the first unlocking member to rotate from the first position to the second position.

[0031] Due to the application of the above technical solution, the present invention has the following advantages over the prior art: when the stroller of the present invention is unfolded for use, the left and right side supports are unfolded, and the rear cross brace assembly is unfolded and supported between the left and right rear lower rods. This provides the stroller with greater rigidity in the unfolded state, improving the structural stability of the stroller and enhancing the safety of the stroller. Moreover, when folded, the stroller is compact and small in size, making it easy to carry and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Attachment Figure 1 This is one of the three-dimensional schematic diagrams of the child stroller of this embodiment in the unfolded state;

[0033] Attachment Figure 2 This is a second perspective schematic diagram of the child stroller of this embodiment in the unfolded state;

[0034] Attachment Figure 3 This is the third perspective diagram of the child stroller in the unfolded state according to this embodiment;

[0035] Attachment Figure 4 This is a fourth perspective schematic diagram of the child stroller of this embodiment in the unfolded state;

[0036] Attachment Figure 5 is a schematic side view of the child stroller of this embodiment in the unfolded state;

[0037] Attachment Figure 6 is a schematic cross-sectional view of the push rod assembly of the child stroller of this embodiment in an unfolded state;

[0038] Attachment Figure 7 For attachment Figure 6 A rotational enlarged diagram after removing part of the structure;

[0039] Attachment Figure 8 2 is a cross-sectional view of the push rod assembly of the child stroller of this embodiment after the first unlocking mechanism is operated to unlock the second locking mechanism in the unfolded state;

[0040] Attachment Figure 9 For attachment Figure 8 A rotational enlarged diagram after removing part of the structure;

[0041] Attachment Figure 10 2 is a cross-sectional view of the push rod assembly of this embodiment when the upper push rod slides downward and approaches the middle push rod (the first locking mechanism is in a locked state);

[0042] Attachment Figure 11 For attachment Figure 10 A partial enlarged schematic diagram in the middle;

[0043] Attachment Figure 122 is a cross-sectional view of the push rod assembly of this embodiment when the upper push rod slides downward and approaches the middle push rod (the first locking mechanism is in the unlocked state);

[0044] Attachment Figure 13 For attachment Figure 12 A partial enlarged schematic diagram in the middle;

[0045] Attachment Figure 14 2 is a cross-sectional view of the push rod assembly of this embodiment when the middle push rod slides downward and approaches the lower push rod (the first locking mechanism is in a locked state);

[0046] Attachment Figure 15 For attachment Figure 14 A partial enlarged schematic diagram in the middle;

[0047] Attachment Figure 16 2 is a cross-sectional view of the push rod assembly of this embodiment when the middle push rod slides downward and approaches the lower push rod (the first locking mechanism is in the unlocked state);

[0048] Attachment Figure 17 For attachment Figure 16 A partial enlarged schematic diagram in the middle;

[0049] Attachment Figure 18 is a side view schematic diagram of the child stroller of this embodiment during the folding process;

[0050] Attachment Figure 19 is a three-dimensional schematic diagram of the child stroller of this embodiment in a folded state;

[0051] Attachment Figure 20 FIG2 is a front view of the child stroller of this embodiment in a folded state.

[0052] Among them: 11, front bracket; 12, rear bracket assembly; 121, rear upper rod; 122, rear lower rod; 13, push rod assembly; 131, upper push rod; 132, middle push rod; 132a, second locking slot; 133, lower push rod; 1331, first locking slot; 1332, second unlocking member; 1332a, third inclined plane; 14, side armrest; 15, lower connecting rod; 16, front connecting rod; 17, rear pull rod; 18, seat rod; 19, sliding sleeve; 21, front cross brace; 211, main brace; 212, connecting rod; 22, rear cross brace; 23, upper cross brace; 24, brace; 31, first connecting rod; 32, second connecting rod; 401, first axis; 402, second axis; 403, third axis; 404, fourth axis ;405, fifth axis;406, sixth axis;407, seventh axis;408, eighth axis;409, ninth axis;410, tenth axis;411, eleventh axis;412, twelfth axis;413, thirteenth axis;5, first locking member;51, first matching portion;511, second inclined surface;52, second matching portion;61, second locking member;611, main body;611a, fourth inclined surface;612, locking pin;62, third elastic member;7, third locking member;81, unlocking button;82, second unlocking member;821, fifth inclined surface;83, traction rope;91, first unlocking member;911, unlocking portion;911a, first inclined surface;92, first elastic member;10, second unlocking mechanism. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0054] The stroller of the present invention has an unfolded state and a folded state. Figures 1 to 5 As shown, the child stroller includes a stroller frame, a front wheel assembly arranged at a bottom front portion of the stroller frame, and a rear wheel assembly arranged at a bottom rear portion of the stroller frame.

[0055] The cart frame comprises side brackets respectively arranged on the left and right sides and a cross brace assembly connected between the side brackets on the left and right sides.

[0056] Each side bracket includes a front bracket 11 , a rear bracket assembly 12 , a push rod assembly 13 , a side armrest 14 , a lower link 15 , a front link 16 and a rear pull rod 17 .

[0057] The front wheel assemblies are respectively arranged at the lower portion of the front bracket 11 on each side.

[0058] The rear support assembly 12 on each side includes a rear upper rod 121 and a rear lower rod 122. The rear lower rod 122 can be slidably arranged on the rear upper rod 121 along the length extension direction of the rear upper rod 121, and the rear wheel assembly is respectively arranged at the lower part of the rear lower rod 122 on each side.

[0059] The lower portion of the push rod assembly 13 is rotatably connected to the upper portion of the side armrest 14 via a fifth shaft 405 .

[0060] The lower portion of the side armrest 14, the upper portion of the front frame 11, and the upper portion of the rear upper rod 121 are rotationally connected to two of the three, the third is rotationally connected to either of the three, or the three are coaxially rotationally connected. In this embodiment, the lower portion of the side armrest 14 and the upper portion of the rear upper rod 121 are rotationally connected via a sixth shaft 406, and the upper portion of the front frame 11 and the upper portion of the rear upper rod 121 are rotationally connected via a seventh shaft 407. When the stroller is in the unfolded state, the seventh shaft 407 is located below the sixth shaft 406.

[0061] One end of the lower connecting rod 15 is rotatably connected to the lower portion of the push rod assembly 13 via the eighth shaft 408 , and the lower connecting rod 15 is rotatably connected to the rear upper rod 121 via the ninth shaft 409 .

[0062] One end of the front link 16 is rotatably connected to the front bracket 11 via the tenth shaft 410 , and the other end of the front link 16 is rotatably connected to the lower link 15 via the eleventh shaft 411 .

[0063] One end of the rear pull rod 17 is rotatably connected to the lower portion of the lower link 15 via a twelfth shaft 412 , and the other end of the rear pull rod 17 is rotatably connected to the rear lower rod 122 via a thirteenth shaft 413 .

[0064] The side bracket on each side may also include a seat rod 18 and a sliding sleeve 19. The rear end of the seat rod 18 is rotatably connected to the upper part of the lower connecting rod 15. The sliding sleeve 19 is mounted on the seat rod 18 and can be slidably arranged relative to the seat rod 18. The sliding sleeve 19 is rotatably connected to the side armrest 14.

[0065] In this way, in the side bracket on each side, a four-bar linkage is formed between the rear upper rod 121, the side armrest 14, the push rod assembly 13 and the lower connecting rod 15; a four-bar linkage is formed between the front bracket 11, the rear upper rod 121, the lower connecting rod 15 and the front connecting rod 16; and a crank slider mechanism is formed between the rear upper rod 121, the rear lower rod 122, the rear pull rod 17 and the lower connecting rod 15.

[0066] When the stroller is in the unfolded state, the axis centers of the ninth shaft 409, the tenth shaft 410, and the eleventh shaft 411 lie in the same plane. This ensures that, in the four-bar linkage formed by the front bracket 11, the rear upper rod 121, the lower link 15, and the front link 16, the axis centers of the seventh shaft 407, the ninth shaft 409, the tenth shaft 410, and the eleventh shaft 411 connect to form a triangular structure, thus improving the structural rigidity of the stroller in the unfolded state.

[0067] The cross brace assembly includes a front cross brace assembly, a rear cross brace assembly and an upper cross brace assembly. The front cross brace assembly is arranged between the front brackets 11 on the left and right sides, the rear cross brace assembly is arranged between the rear lower rods 122 on the left and right sides, and the upper cross brace assembly is arranged between the push rod assemblies 13 on the left and right sides.

[0068] The front cross brace assembly includes two front cross brace rods 21 , one end of the two front cross brace rods 21 is rotatably connected, and the other end of the two front cross brace rods 21 is rotatably connected to the front bracket 11 on the corresponding side.

[0069] The rear cross brace assembly includes two rear cross brace rods 22 , one end of the two rear cross brace rods 22 is rotatably connected, and the other end of the two rear cross brace rods 22 is rotatably connected to the rear lower rod 122 on the corresponding side.

[0070] The upper cross brace assembly includes two upper cross brace rods 23 , one end of the two upper cross brace rods 23 is rotatably connected, and the other end of the two upper cross brace rods 23 is rotatably connected to the upper part of the push rod assembly 13 on the corresponding side.

[0071] The cross brace assembly may also include a cross brace assembly arranged between the side brackets on the left and right sides, and the cross brace assembly includes two cross-shaped support rods 24 that rotate at the intersection, one end of each support rod 24 is rotatably connected to the rear end of the seat rod 18 on one side, and the other end of each support rod 24 is rotatably connected to the lower connecting rod 15 on the other side.

[0072] Such provision of the cross brace assembly can improve the structural rigidity of the child stroller when in use in the unfolded state, thereby improving the safety of the child stroller when in use.

[0073] The stroller frame also includes a first linkage mechanism and a second linkage mechanism, which are respectively arranged on the left and right sides. When the side brackets on each side are folded during the folding process of the stroller, the first linkage mechanisms on both sides can drive the two front cross braces 21 to rotate and fold relative to each other, and the second linkage mechanisms on both sides can drive the two rear cross braces 22 to rotate and fold relative to each other, so that the side brackets on the left and right sides are brought closer together, so that the stroller can be folded longitudinally and transversely at the same time, making the stroller easy to fold.

[0074] The first linkage mechanism includes a first link 31. One end of the first link 31 is rotatably connected to the front cross brace 21 via a first shaft 401. The other end of the first link 31 is rotatably connected to the rear upper bar 121 via a second shaft 402. The first shaft 401 extends in the front-to-back direction, and the second shaft 402 extends in the left-to-right direction. When the stroller is in the expanded state, the second shaft 402 is located forward of the ninth shaft 409 on the rear upper bar 121.

[0075] In this embodiment, the front cross support rod 21 includes a main support rod 211 extending in the left-right direction and a connecting rod 212 with one end fixed on the main support rod 211. One end of the two main support rods 211 are rotatably connected, and the other end of the two main support rods 211 are rotatably connected to the front bracket 11 on the corresponding side respectively. One end of the first connecting rod 31 is rotatably connected to the other end of the connecting rod 212 through the first shaft 401.

[0076] The second linkage mechanism includes a second link 32. One end of the second link 32 is rotatably connected to the rear cross brace 22 via a third shaft 403. The other end of the second link 32 is rotatably connected to the lower link 15 via a fourth shaft 404. The third shaft 403 extends in the front-to-back direction, and the fourth shaft 404 extends in the left-to-right direction. When the stroller is in the deployed state, the eighth shaft 408, the ninth shaft 409, the eleventh shaft 411, the fourth shaft 404, and the twelfth shaft 412 are sequentially arranged on the lower link 15 from top to bottom.

[0077] like Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 and Figure 8 As shown, 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 can be slidably disposed on the lower push rod 133 along the length extension direction of the lower push rod 133, and the upper push rod 131 can be slidably disposed on the middle push rod 132 along the length extension direction of the middle push rod 132. The other ends of the two upper cross braces 23 are respectively rotatably connected to the upper portion of the upper push rod 131 on the corresponding side, and the side armrests 14 and the lower connecting rod 15 are respectively rotatably connected to the lower portion of the lower push rod 133. In this embodiment, the upper push rod 131, the middle push rod 132, and the lower push rod 133 all have a tubular cavity extending along their own length direction. The middle push rod 132 can be slidably disposed in the tubular cavity of the lower push rod 133, and the upper push rod 131 can be slidably disposed in the tubular cavity of the middle push rod 132.

[0078] When the stroller is in the unfolded state, the upper push rod 131 extends upwardly most of the way out of the lumen of the middle push rod 132, and the middle push rod 132 extends upwardly most of the way out of the lumen of the lower push rod 133. Figure 1 、 Figure 2 and Figure 5 When the stroller is in the folded state, 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. Figure 19 and Figure 20 shown.

[0079] The stroller also includes a first locking mechanism for locking the relative position of the middle push rod 132 and the lower push rod 133. When the first locking mechanism is in a locked state, the middle push rod 132 and the lower push rod 133 cannot slide relative to each other. When the first locking mechanism is in an unlocked state, the middle push rod 132 can slide relative to the lower push rod 133.

[0080] The first locking mechanism includes a first locking member 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 a locked state, the first locking member 5 is inserted into the first locking groove 1331, thereby preventing the middle push rod 132 and the lower push rod 133 from sliding relative to each other. Figure 10 、 Figure 11 、 Figure 14 and Figure 15 When the first locking mechanism is in the unlocked state, the first locking member 5 is disengaged from the first locking groove 1331, so that the middle push rod 132 can slide relative to the lower push rod 133, as shown. Figure 12 、 Figure 13 、 Figure 16 and Figure 17 In this embodiment, the first locking member 5 is slidably disposed within the lumen of the middle push rod 132 , and the first locking groove 1331 is disposed on the lower push rod 133 . By sliding the first locking member 5 relative to the middle push rod 12 , the first locking member 5 can be inserted into or removed from the first locking groove 1331 .

[0081] The push rod assembly further includes a second elastic member (not shown in the figure), the elastic force of which is used to drive the first locking member 5 to slide in a direction of being inserted into the first locking slot 1331 .

[0082] The stroller also includes a second locking mechanism for locking the relative positions of the upper push rod 131 and the middle push rod 132. When the second locking mechanism is locked, the upper push rod 131 and the middle push rod 132 cannot slide relative to each other. When the first locking mechanism is unlocked, the upper push rod 131 can slide relative to the middle push rod 132.

[0083] The second locking mechanism includes a second locking member 61 movably mounted on the upper push rod 131 and a second locking groove 132a mounted on the middle push rod 132. The second locking member 61 includes a body 611 and a locking pin 612. The body 611 is elastic and the locking pin 612 is mounted at one end of the body 611. When the second locking mechanism is in a locked state, the locking pin 612 is inserted into the second locking groove 132a, thereby preventing the upper push rod 131 and the middle push rod 132 from sliding relative to each other. Figure 6 and Figure 7When the second locking mechanism is in the unlocked state, the locking pin 612 is disengaged from the second locking groove 132a, thereby allowing the upper push rod 131 to slide relative to the middle push rod 132, as shown in FIG. Figure 8 and Figure 9 By swinging the main body 611 relative to the upper push rod 131, the locking pin 612 can be inserted into the second locking groove 132a or disengaged from the second locking groove 132a.

[0084] The stroller further includes a third elastic member 62 , the elastic force of the third elastic member 62 is used to drive the second locking member 61 to swing in a direction to insert the locking pin 612 into the second locking slot 132 a .

[0085] The stroller further includes a third locking mechanism for locking the relative positions of the lower push rod 133 and the side armrest 14 or the lower connecting rod 15. When the third locking mechanism is in a locked state, the position of the entire stroller frame is locked. The third locking mechanism can adopt a structure in the prior art. For example, the third locking mechanism includes a third locking member 7 that can be slidably arranged between the lower push rod 133 and the side armrest 14 or the lower connecting rod 15. The third locking member 7 has locking teeth, such as Figure 6 、 Figure 8 、 Figure 10 、 Figure 12 、 Figure 14 and Figure 16 As shown. Each of the side armrest 14, lower link 15, and lower push rod 133 is provided with teeth and grooves capable of engaging with locking teeth. When the third locking mechanism is in the locked state, the locking teeth engage with the teeth and grooves on the side armrest 14, lower link 15, and lower push rod 133, respectively. When the third locking mechanism is in the unlocked state, the locking teeth engage with the teeth and grooves on one of the two, disengaging from the teeth and grooves on the other.

[0086] The stroller further comprises a first unlocking mechanism. When the second locking mechanism is in a locked state, the first unlocking mechanism is operated to drive the second locking mechanism to unlock, thereby allowing the upper push rod 131 to slide downward and approach the middle push rod 132.

[0087] Specifically, such as Figures 6 to 9As shown, the first unlocking mechanism includes an unlocking button 81, a second unlocking member 82, and a pull rope 83. Both the unlocking button 81 and the second unlocking member 82 are slidably mounted on the upper push rod 131. The second unlocking member 82 is housed within the lumen of the upper push rod 131, and the unlocking button 81 partially extends outside the upper push rod 131, allowing for manual operation during unlocking. One end of the pull rope 83 is directly or indirectly mounted on the unlocking button 81, while the other end of the pull rope 83 is mounted on the second unlocking member 82. The second unlocking member 82 is configured to abut against the second locking member 61. In this embodiment, the main body 611 of the second locking member 61 is provided with a fourth inclined surface 611a, and the second unlocking member 82 is provided with a fifth inclined surface 821 corresponding to the fourth inclined surface 611a. The fourth inclined surface 611a and the fifth inclined surface 821 both obliquely intersect with the sliding direction of the second unlocking member 82, and the fourth inclined surface 611a and the fifth inclined surface 821 abut against each other.

[0088] When the second locking mechanism is in the locked state and the unlocking button 81 is operated, the second unlocking member 82 is pulled upward by the traction rope 83, and the fourth inclined surface 611a and the fifth inclined surface 821 cooperate with each other to make the main body 611 of the second locking member 61 swing relative to the upper push rod 131, so that the locking pin 612 disengages from the second locking groove 132a, and the second locking mechanism is unlocked, and the upper push rod 131 can slide downward relative to the middle push rod 132 and move closer to the middle push rod 132.

[0089] The stroller further comprises a first unlocking member 91, which is arranged at the 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. Figure 6 and Figure 8 When the upper push rod 131 slides downward relative to the middle push rod 132 and approaches the middle push rod 132, the first unlocking member 91 can cooperate with the first locking member 5. As a result, when the upper push rod 131 slides downward, the first locking member 5 can slide in a direction of disengaging from the first locking groove 1331, thereby unlocking the first locking mechanism. In this way, the unlocking operation of the first locking mechanism can be conveniently performed.

[0090] The first unlocking member 91 is rotatably disposed at the lower portion of the upper push rod 131 . The first unlocking member 91 rotates relative to the upper push rod 131 to have a first position and a second position.

[0091] The first unlocking member 91 is abutted against the lower end of the second unlocking member 82. When the unlocking button 81 is operated to unlock the second locking mechanism, the first unlocking member 91 can be driven to rotate relative to the upper push rod 131 to the first position through the cooperation between the first unlocking member 91 and the second unlocking member 82. Figure 8 、 Figure 9 、 Figure 12 、 Figure 13 、 Figure 16and Figure 17 shown.

[0092] When the unlocking button 81 is released, the first unlocking member 91 rotates in the opposite direction under the elastic force of the first elastic member 92, thereby rotating from the first position to the second position. Figure 6 、 Figure 7 、 Figure 10 、 Figure 11 、 Figure 14 and Figure 15 In this embodiment, the first elastic member 92 is a torsion spring, one end of the torsion spring is arranged on the first unlocking member 91 , and the other end of the torsion spring is arranged on the upper push rod 131 .

[0093] When the first unlocking member 91 is in the first position and the upper push rod 131 slides downward, the first unlocking member 91 can cooperate with the first locking member 5, causing the first locking member 5 to slide in the direction of disengaging from the first locking groove 1331, thereby unlocking the first locking mechanism.

[0094] When the first unlocking member 91 is in the second position and the upper push rod 131 slides downward, the first locking member 5 cannot slide relative to the middle push rod 132, thereby preventing the first locking mechanism from being unlocked and maintaining the locked state. In this way, when the child stroller is in use, if the second locking mechanism is unlocked due to an erroneous operation of the unlocking button 81, the upper push rod 131 can slide downward relative to the middle push rod 132 and approach the middle push rod 132. During the downward sliding process of the upper push rod 131, when the unlocking button 81 is released, the first unlocking member 91 is in the second position under the elastic force of the first elastic member 92. After the upper push rod 131 slides downward relative to the middle push rod 132 for a certain distance, the first unlocking member 91 abuts against the first locking member 5, preventing the upper push rod 131 from sliding further downward and the first locking member 5 from sliding relative to the middle push rod 132, thereby preventing the first locking mechanism from sliding downward and hitting the child in the child stroller.

[0095] Specifically, the first unlocking member 91 is provided with an unlocking portion 911, and the first locking member 5 is provided with a first matching portion 51 and a second matching portion 52, respectively. The distance between the first matching portion 51 and the unlocking portion 911 is greater than the distance between the second matching portion 52 and the unlocking portion 911. When the first unlocking member 91 is in the first position, the position of the unlocking portion 911 corresponds to the position of the first matching portion 51. Figure 12 、 Figure 13 、 Figure 16 and Figure 17 When the first unlocking member 91 is in the second position, the position of the unlocking portion 911 corresponds to the position of the second matching portion 52, as shown Figure 10 、 Figure 11 、 Figure 14 and Figure 15 shown.

[0096] In this embodiment, the second matching portion 52 is the upper end surface of the first locking member 5. 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. Figure 10 、 Figure 11 、 Figure 14 and Figure 15 As shown, due to the obstruction of the first locking member 5, the upper push rod 131 cannot continue to slide downward, and the first locking member 5 cannot slide either.

[0097] In this embodiment, the first matching portion 51 is a groove that is concave downward from the upper end surface of the first locking member 5. The unlocking portion 911 has a first inclined surface 911a, and the first matching portion 51, i.e., one side of the groove, is a second inclined surface 511 that matches the first inclined surface 911a. When the upper push rod 131 slides downward to allow the unlocking portion 911 to enter the groove, the first inclined surface 911a and the second inclined surface 511 are abutted and matched. Figure 12 、 Figure 13 、 Figure 16 and Figure 17 This allows the upper push rod 131 to continue sliding downward and approaching the middle push rod 132, and allows the first locking member 5 to slide in the direction of escaping from the first locking groove 1331 until the upper push rod 131 slides downward into place and the first locking mechanism is unlocked.

[0098] That is, when the cart frame needs to be folded and the first locking mechanism needs to be unlocked, the unlocking button 81 needs to be operated while the upper push rod 131 slides downward, thereby driving the first unlocking member 91 to move to the first position through the second unlocking member 82.

[0099] like Figures 14 to 17 As shown, the stroller also includes a second unlocking mechanism 10, which is used to unlock the third locking mechanism. The second unlocking mechanism 10 is movably disposed within the tubular cavity of the lower push rod 133. When the middle push rod 132 slides downward and abuts against the lower push rod 133, the lower portion of the middle push rod 132 abuts against the second unlocking mechanism 10, thereby actuating the second unlocking mechanism 10 and, in turn, unlocking the third locking mechanism. This facilitates unlocking the third locking mechanism and facilitates folding of the stroller. The method of unlocking the third locking mechanism via the second unlocking mechanism 10 can employ a conventional structure.

[0100] First locking slots 1331 are provided at the upper and lower ends of the lower push rod 133. When the stroller is in the unfolded state, the first locking member 5 is inserted into the first locking slot 1331 located at the upper portion of the lower push rod 133, thereby locking the first locking mechanism. As the middle push rod 132 slides downward and approaches the lower push rod 133, releasing the unlock button 81 allows the first locking member 5 to be inserted into the first locking slot 1331 located at the lower portion of the lower push rod 133, thereby relocking the first locking mechanism.

[0101] When the unlock button 81 is released during the downward sliding of the middle push rod 132, the first unlocking member 91 is in the second position under the elastic force of the first elastic member 92. At this time, when the middle push rod 132 slides downward to the position where the first locking member 5 corresponds to the first locking groove 1331 at the lower part of the lower push rod 133, the first locking member 5 is automatically inserted into the first locking groove 1331 under the elastic force of the second elastic member, thereby locking the position of the middle push rod 132 and the lower push rod 133, and the middle push rod 132 cannot slide further downward. Figure 14 and Figure 15 At this point, the lower portion of the middle push rod 132 is spaced from the second unlocking mechanism 10, preventing it from actuating. This prevents the third locking mechanism from unlocking due to an erroneous downward movement of the middle push rod 132, thereby folding the stroller frame. This improves the safety of the stroller.

[0102] When the stroller is folded and the third locking mechanism needs to be unlocked, the unlocking button 81 is operated. After the first unlocking member 91 is driven to the first position by the second unlocking member 82, the middle push rod 132 can continue to slide downward, so that the unlocking portion 911 enters the groove, and the first inclined surface 911a is matched with the second inclined surface 511, so that the middle push rod 132 can continue to slide downward and approach the lower push rod 133, and the first locking member 5 can slide in the direction of disengaging from the first locking groove 1331 until the middle push rod 132 slides downward into place, and the first locking mechanism is unlocked. Figure 16 and Figure 17 As the middle push rod 132 continues to slide downward, the lower portion of the middle push rod 132 can abut against the second unlocking mechanism 10, causing the second unlocking mechanism 10 to operate, thereby unlocking the third locking mechanism.

[0103] like Figures 14 to 17As shown, the stroller further includes a third unlocking member 1332, which is fixedly mounted on the lower push rod 133 and located at the first locking slot 1331 at the bottom of the lower push rod 133. The third unlocking member 1332 is provided with a third inclined surface 1332a. When the first locking member 5 is inserted into the first locking slot 1331 at the bottom of the lower push rod 133, the first locking member 5 abuts against the third inclined surface 1332a. Thus, when the middle push rod 132 slides downward into the first locking slot 1331 at the bottom of the lower push rod 133, the first locking member 5 abuts against the third inclined surface 1332a, causing the first locking member 5 to slide out of the first locking slot 1331 when the middle push rod 132 is pulled upward. This unlocks the first locking mechanism, allowing the middle push rod 132 to slide upward and reset.

[0104] When the stroller is in the unfolded state, the first locking mechanism, the second locking mechanism and the third locking mechanism are all in the locked state. Figures 1 to 5 shown.

[0105] When the stroller is folded from the unfolded state, the first unlocking mechanism is operated to unlock the second locking mechanism, causing the upper push rod 131 to slide downward and approach the middle push rod 132, and the first locking mechanism is unlocked, causing the middle push rod 132 to slide downward and approach the lower push rod 133, and the third locking mechanism is unlocked. The push rod assembly 13 is rotated downward and forward as a whole to approach the side armrest 14, so that the side armrest 14 and the lower connecting rod 15 are both rotated downward, thereby pulling the front bracket 11 backward through the front connecting rod 16 to rotate and approach the rear bracket assembly 12, and pulling the rear lower rod 122 upward relative to the rear upper rod 121 through the rear pull rod 17 to move and approach the rear upper rod 121. In this process, the front cross brace 21 is rotated by pulling the first connecting rod 31, and the rear cross brace 22 is rotated by pulling the second connecting rod 32, so that the side brackets on the left and right sides are close to each other. The folding process is as follows. Figure 18 Until all the parts of the stroller are tightly together and finally folded as shown. Figure 19 and Figure 20 When folded, the stroller has a compact structure and small size, making it easy to carry and store.

[0106] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A child stroller, comprising a stroller frame having an unfolded state and a folded state, the stroller frame comprising left and right side brackets, respectively, and a cross brace assembly connected between the left and right side brackets, characterized in that: The side brackets on each side include: A front bracket, wherein the front wheel assembly is arranged at the lower portion of the front bracket; The rear support assembly includes a rear upper rod and a rear lower rod slidably arranged on the rear upper rod along the longitudinal extension direction of the rear upper rod, and the rear wheel assembly is arranged at the lower part of the rear lower rod; Push rod assembly; a side armrest, wherein the upper portion of the side armrest is rotatably connected to the lower portion of the push rod assembly, two of the lower portion of the side armrest, the upper portion of the front bracket, and the upper portion of the rear upper rod are rotatably connected, the third is rotatably connected to either of the aforementioned two, or the aforementioned three are coaxially rotatably connected; a lower connecting rod, the upper portion of which is rotatably connected to the lower portion of the push rod assembly, and the lower connecting rod is rotatably connected to the rear upper rod; a front connecting rod, one end of the front connecting rod being rotatably connected to the front bracket, and the other end of the front connecting rod being rotatably connected to the lower connecting rod; a rear pull rod, one end of which is rotatably connected to the lower portion of the lower connecting rod, and the other end of which is rotatably connected to the rear lower rod; The cross brace assembly includes a rear cross brace assembly arranged between the rear lower rods on the left and right sides, and the rear cross brace assembly includes two rear cross brace rods rotatably connected at one end, and the other ends of the two rear cross brace rods are respectively rotatably connected to the rear lower rod on the corresponding side; The cross brace assembly further includes a front cross brace assembly disposed between the left and right front brackets, the front cross brace assembly including two front cross brace rods rotatably connected at one end, and the other ends of the two front cross brace rods are respectively rotatably connected to the front bracket on the corresponding side; The cart frame also includes a second linkage mechanism that drives the two rear cross braces to rotate and fold relative to each other when the side bracket is folded. The second linkage mechanism includes a second connecting rod, one end of the second connecting rod is rotatably connected to the rear cross brace via a third shaft, and the third shaft extends in the front-to-back direction. The other end of the second connecting rod is rotatably connected to the lower connecting rod via a fourth shaft, and the fourth shaft extends in the left-right direction.

2. The stroller according to claim 1, characterized in that: The cart frame also includes a first linkage mechanism that drives the two front cross braces to rotate and fold relative to each other when the side bracket is folded. The first linkage mechanism includes a first connecting rod, one end of the first connecting rod is rotatably connected to the front cross brace via a first axis, the first axis extends in the front-to-back direction, and the other end of the first connecting rod is rotatably connected to the rear upper rod via a second axis, and the second axis extends in the left-right direction.

3. The stroller according to claim 2, characterized in that: When the stroller is in the unfolded state, on the rear upper rod, the rotation connection between the first connecting rod and the rear upper rod is located in front of the rotation connection between the lower connecting rod and the rear upper rod.

4. The stroller according to claim 2, characterized in that: The front cross support rod includes a main support rod extending in the left and right directions and a connecting rod with one end fixed on the main support rod. One end of the two main support rods is rotatably connected, and the other end of the two main support rods is rotatably connected to the front bracket on the corresponding side respectively. One end of the first connecting rod is rotatably connected to the other end of the connecting rod.

5. The stroller according to claim 1, characterized in that: When the stroller is in an unfolded state, on the lower link, the rotation connection between the lower link and the push rod assembly, the rotation connection between the lower link and the rear upper rod, the rotation connection between the lower link and the front link, the rotation connection between the lower link and the second link, and the rotation connection between the lower link and the rear pull rod are arranged in order from top to bottom.

6. The stroller according to claim 1, characterized in that: When the stroller is in an unfolded state, the axis of the rotating shaft of the front link and the front bracket, the axis of the rotating shaft of the front link and the lower link, and the axis of the rotating shaft of the lower link and the rear upper rod are located in the same plane.

7. The stroller according to claim 1, characterized in that: The side bracket also includes a seat rod and a sliding sleeve mounted on the seat rod and capable of sliding relative to the seat rod. The rear end of the seat rod is rotatably connected to the upper part of the lower connecting rod, and the sliding sleeve is rotatably connected to the side armrest.

8. The stroller according to claim 7, characterized in that: The cross brace assembly also includes a cross brace assembly, which includes two brace rods that are cross-crossed and rotate at the intersection, one end of each brace rod is rotatably connected to the rear end of the seat rod on one side, and the other end of each brace rod is rotatably connected to the lower connecting rod on the other side.

9. The stroller according to claim 1, characterized in that: The push rod assembly includes a lower push rod, a middle push rod slidably provided on the lower push rod along the length extension direction of the lower push rod, an upper push rod slidably provided on the middle push rod along the length extension 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 member for driving the first locking mechanism to unlock. The first unlocking member can be rotatably provided on the upper push rod, and the first unlocking member cooperates with the first unlocking mechanism. When the first unlocking mechanism is operated, the first unlocking member is in the first position and the second locking mechanism is unlocked; when the first unlocking mechanism is released, the first unlocking member is in the second position; When the first unlocking member is in the second position and the upper push rod slides downward and approaches the middle push rod, the first unlocking member cannot drive the first locking mechanism to unlock; When the first unlocking member is in the first position and the upper push rod slides downward and approaches the middle push rod, the first unlocking member can drive the first locking mechanism to unlock.

10. The stroller according to claim 9, characterized in that: The first locking mechanism includes a first locking member slidably provided on one of the middle push rod and the lower push rod, and a first locking slot provided on the other, wherein the first locking member can be inserted into or removed from the first locking slot; When the first unlocking member is in the second position and the upper push rod slides downward and approaches the middle push rod, the first unlocking member can abut against and cooperate with the first locking member without driving the first locking member to slide; When the first unlocking member is in the first position and the upper push rod slides downward and approaches the middle push rod, the first unlocking member can abut against and cooperate with the first locking member to drive the first locking member to slide.

11. The stroller according to claim 10, characterized in that: An unlocking portion is provided on the first unlocking member, and a first matching portion and a second matching portion are respectively provided on the first locking member; when the first unlocking member is in the first position, the position of the unlocking portion corresponds to the position of the first matching portion, and when the upper push rod slides downward, the unlocking portion is pressed against and matched with the first matching portion; when the first unlocking member is in the second position, the position of the unlocking portion corresponds to the position of the second matching portion, and when the upper push rod slides downward, the unlocking portion is pressed against and matched with the second matching portion.

12. The stroller according to claim 11, characterized in that: The unlocking portion has a first inclined surface, and the first matching portion has a second inclined surface matching the first inclined surface. When the first unlocking member is in the first position, the upper push rod slides downward and approaches the middle push rod, so that the first inclined surface and the second inclined surface can be abutted and matched.

13. The stroller according to claim 10, characterized in that: The stroller further includes a third locking mechanism for locking the relative positions of the push rod assembly and the lower connecting rod or the side armrest, and a second unlocking mechanism movably arranged on the lower push rod for driving the third locking mechanism to unlock. When the middle push rod slides downward and approaches the lower push rod, the middle push rod can cooperate with the second unlocking mechanism to drive the second unlocking mechanism to operate and unlock the third locking mechanism.

14. The stroller according to claim 13, characterized in that: The first locking grooves are respectively provided at the upper and lower ends of the lower push rod. When the stroller is in the unfolded state, the first locking piece is inserted into the first locking groove at the upper portion. When the middle push rod slides downward and approaches the lower push rod, the first locking piece can be inserted into the first locking groove at the lower portion, so that the middle push rod cannot slide downward and cooperate with the second unlocking mechanism, so that the third locking mechanism cannot be unlocked.

15. The stroller according to claim 9, characterized in that: The first unlocking mechanism includes a second unlocking member that can be slidably arranged in the upper push rod, and the second unlocking member is respectively cooperated with the first unlocking member and the second locking mechanism. When the second unlocking member is driven to slide relative to the upper push rod to unlock the second locking mechanism, the first unlocking member rotates relative to the upper push rod from the second position to the first position.

16. The stroller according to claim 9, characterized in that: The child stroller further includes a first elastic member for driving the first unlocking member to rotate from the first position to the second position.

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