Baby stroller convenient to fold and unfold

Abstract

The utility model discloses a stroller convenient to fold and unfold, which only needs to operate a stroller frame unlocking mechanism to link with a stroller frame locking mechanism to release a locking state of a push rod assembly relative to a rear foot rod, and then operate the push rod assembly to rotate and fold correspondingly, so that folding of a front foot rod and a handrail assembly can be linked until the stroller is completely folded. Therefore, the whole child stroller can be unlocked only by manually operating the unlocking action of the stroller frame unlocking mechanism by a user, and the child stroller has the advantages of being convenient to unlock, smooth in folding and unfolding and stable and reliable in structure.

Description

[Technical field]

[0001] The utility model relates to the field of children's travel products, in particular to a child stroller which is convenient to fold and unfold. [Background technology]

[0002] Strollers have become an indispensable product in the growth process of infants and young children. Currently, many strollers on the market include a foldable stroller frame and a seat frame connected to the stroller frame.

[0003] However, the current strollers have a complex structure, which results in complex operations and inconvenience in use during folding or unfolding of the strollers. For example, when folding the strollers at this stage, it is necessary to first operate the armrest locking mechanism to unlock the locked state of the armrests, or first operate the locking state of the seat frame relative to the frame, then operate the frame unlocking mechanism to release the locked state of the frame, and then operate the frame to fold.

[0004] For this reason, the present invention is studied and proposed in view of the above-mentioned problems. [Utility Model Content]

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a child stroller that is easy to fold and unfold. It only requires operating a frame unlocking mechanism to link with a frame locking mechanism to release the locking state of a push rod assembly relative to a rear foot rod, and then operating the push rod assembly to rotate and fold accordingly to link the folding and folding of a front foot rod and an armrest assembly until the child stroller is completely folded. For this reason, the utility model only requires a user to manually operate the unlocking action of the frame unlocking mechanism to unlock the entire child stroller. The utility model has the characteristics of convenient unlocking operation, smooth folding and unfolding, and a stable and reliable structure.

[0006] The utility model is realized by the following technical solutions:

[0007] A child stroller that is convenient to fold and unfold, the child stroller can be switched between an unfolded use state and a folded use state, comprising:

[0008] A front foot rod 1, the lower end of which is connected to a front wheel set;

[0009] A rear foot rod 2, wherein the lower end of the rear foot rod 2 is connected to a rear wheel set, and the upper end of the rear foot rod 2 is rotatably connected to the upper end of the front foot rod 1;

[0010] A push rod assembly 3, wherein the lower end of the push rod assembly 3 is rotatably connected to the upper end of the front foot rod 1 or the upper end of the rear foot rod 2;

[0011] A support linkage assembly 4, wherein the front end of the support linkage assembly 4 is movably connected to the front foot rod 1, and the rear end of the support linkage assembly 4 is movably connected to the rear foot rod 2;

[0012] A support driving member 5, wherein the upper end of the support driving member 5 is movably connected to the lower part of the push rod assembly 3, and the lower end of the support driving member 5 is movably connected to the support linkage assembly 4;

[0013] An armrest assembly 6, wherein the corresponding end of the armrest assembly 6 is rotatably connected to the upper end of the front foot rod 1 or the upper end of the rear foot rod 2 or the lower end of the push rod assembly 3;

[0014] An armrest linkage member 71, wherein the upper end of the armrest linkage member 71 is movably connected to the armrest assembly 6, and the lower end of the armrest linkage member 71 is movably connected to the support linkage member 4 or the support driving member 5, wherein the support linkage member 4 is configured to be driven by the support driving member 5 when the push rod assembly 3 is flipped and folded relative to the rear foot rod 2, and the front foot rod 1 is flipped, folded, and the support linkage member 4 or the support driving member 5 is linked to the armrest assembly 6 to flip, fold, and the rear foot rod 2 via the armrest linkage member 71;

[0015] A frame locking mechanism, the frame locking mechanism is located between the front foot rod 1 or the rear foot rod 2 and the push rod assembly 3 and is used to lock the push rod assembly 3 relative to the corresponding front foot rod 1 or the rear foot rod 2;

[0016] The frame unlocking mechanism is located on the push rod assembly 3 and is used to link the unlocking action of the frame locking mechanism, thereby releasing the locking state of the push rod assembly 3 relative to the front leg rod 1 or the rear leg rod 2.

[0017] As described above, in a stroller that is easy to fold and unfold, the support linkage assembly 4 is configured to be driven by the support driving member 5 when the push rod assembly 3 is flipped and unfolded relative to the rear leg rod 2, thereby linking the front leg rod 1 to flip and unfold relative to the rear leg rod 2, and the support linkage assembly 4 or the support driving member 5 links the armrest assembly 6 to flip and unfold relative to the rear leg rod 2 through the armrest linkage member 71.

[0018] As described above, a stroller that is easy to fold and unfold also includes a transverse connecting rod 7, which is located between the two supporting linkage components 4 and is respectively connected to the two supporting linkage components 4; the lower end of the armrest linkage component 71 is rotatably connected to the transverse connecting rod 7, and the supporting linkage component 4 is configured to be driven by the supporting driving component 5 when the push rod component 3 is flipped and folded relative to the rear foot rod 2, and the front foot rod 1 is linked to flip, close and fold relative to the rear foot rod 2, and the supporting linkage component 4 links the armrest component 6 to flip, close and fold relative to the rear foot rod 2 through the transverse connecting rod 7 and the armrest linkage component 71.

[0019] As described above, a baby stroller with convenient folding and unfolding, wherein the support linkage assembly 4 includes a front support linkage 41 and a rear support linkage 42 in a V-shaped structure. The connected end of the rear support linkage 42 is rotatably connected to the middle part of the rear foot rod 2. The upper branch end of the rear support linkage 42 is rotatably connected to the lower end of the support driving member 5. The lower branch end of the rear support linkage 42 is rotatably connected to the rear end of the front support linkage 41. The front end of the front support linkage 41 is rotatably connected to the middle or upper part of the front foot rod 1. The lower end of the armrest linkage 71 is directly or indirectly rotatably connected to the lower branch end of the rear support linkage 42.

[0020] As described above, a baby stroller with convenient folding and unfolding further includes a joint connection seat 21. The middle part of the joint connection seat 21 is arranged at the upper end of the rear foot rod 2. The front end of the joint connection seat 21 is rotatably connected to the upper end of the front foot rod 1. The rear part of the joint connection seat 21 is rotatably connected to the lower end of the push rod assembly 3. The frame locking mechanism is located between the joint connection seat 21 and the push rod assembly 3 for locking the push rod assembly 3 relative to the joint connection seat 21.

[0021] As described above, a baby stroller with convenient folding and unfolding, wherein the frame locking mechanism includes a frame locking groove respectively arranged at the joint connection seat 21 and the lower end of the push rod assembly 3, and a frame locking gear slidably arranged axially between the joint connection seat 21 and the lower end of the push rod assembly 3 and capable of being simultaneously engaged with the frame locking grooves at the joint connection seat 21 and the lower end of the push rod assembly 3. A frame locking elastic member is arranged between the frame locking gear and the joint connection seat 21 for keeping the frame locking gear simultaneously engaged with the frame locking grooves at the joint connection seat 21 and the lower end of the push rod assembly 3. The frame locking gear is configured to be linked to perform an unlocking action by the frame unlocking mechanism.

[0022] As described above, a baby stroller with convenient folding and unfolding, wherein the frame unlocking mechanism includes a frame unlocking rotating seat rotatably arranged between the lower end of the push rod assembly 3 and the frame locking gear. Frame unlocking inclined surfaces which can be used in cooperation with each other and are used for driving the frame unlocking rotating seat to slide correspondingly during the rotation of the frame unlocking rotating seat are respectively arranged at the frame unlocking rotating seat and the lower end of the push rod assembly 3. The frame unlocking mechanism further includes a frame unlocking member movably arranged on the push rod assembly 3 and a frame unlocking linkage arranged on the push rod assembly 3. One end of the frame unlocking linkage is connected to the frame unlocking member, and the other end of the frame unlocking linkage is connected to the frame unlocking rotating seat.

[0023] As described above, a stroller that is easy to fold and unfold also includes a seat portion 8 and a seat linkage 72, wherein the seat portion 8 includes a front seat plate 81 and a rear seat plate 82, wherein the rear seat plate 82 is directly or indirectly fixedly connected to the lower end of the push rod assembly 3, and the front end of the rear seat plate 82 is rotatably connected to the rear end of the front seat plate 81; the upper end of the seat linkage 72 is rotatably connected to the middle or front part of the front seat plate 81, and the lower end of the seat linkage 72 is directly or indirectly movably connected to the support linkage assembly 4 or the support drive member 5.

[0024] As described above, a stroller that is easy to fold and unfold, the push rod assembly 3 includes a lower push rod 31 whose lower end is rotatably connected to the upper end of the rear leg rod 2, and an upper push rod 32 is movably connected to the upper end of the lower push rod 31. An upper push rod locking mechanism 33 for locking the upper push rod 32 relative to the lower push rod 31 is provided between the upper push rod 32 and the lower push rod 31, and an upper push rod unlocking mechanism 34 for linking the unlocking action of the upper push rod locking mechanism 33 is provided on the upper push rod 32; the frame unlocking mechanism is configured to be linked to the upper push rod 32 when the upper push rod 32 is movably folded to a preset position relative to the lower push rod 31, thereby linking the frame unlocking mechanism to the unlocking action of the frame locking mechanism.

[0025] As described above, in a stroller that is easy to fold and unfold, the lower end of the upper push rod 32 is rotatably connected to the upper end of the lower push rod 31, and an upper push rod elastic reset member is provided between the lower end of the upper push rod 32 and the upper end of the lower push rod 31 for driving the upper push rod 32 to automatically flip upward and fold relative to the lower push rod 31.

[0026] As described above, in the process of switching the stroller from the unfolded state to the folded state, the upper ends of the front wheel assembly, the rear wheel assembly and the push rod assembly 3 are simultaneously supported on the support surface so that the stroller is in the standing folded state.

[0027] Compared with the prior art, the utility model has the following advantages:

[0028] 1. When the stroller is folded, the frame unlocking mechanism is operated to link with the frame locking mechanism to release the locking state of the push rod assembly relative to the rear foot rod, and then the push rod assembly is operated to flip downward relative to the rear foot rod and fold toward one side of the rear foot rod. During the folding process of the push rod assembly, the push rod assembly drives the support linkage assembly to act accordingly through the support driving member, so that the support linkage assembly links the front foot rod to flip backward relative to the rear foot rod and fold toward one side of the rear foot rod, and at the same time, the support linkage assembly links the armrest assembly to flip downward relative to the rear foot rod and fold toward one side of the rear foot rod through the armrest linkage member. Therefore, the stroller can be unlocked as a whole by the user only needing to manually operate the unlocking action of the frame unlocking mechanism, and has the characteristics of convenient unlocking operation, smooth folding and unfolding, and stable and reliable structure.

[0029] 2. By using the support linkage assembly, the support driving member and the armrest linkage member in cooperation, the corresponding rods of the baby stroller can be linked, which has the characteristic of high-efficiency linkage. In addition, only one set of frame locking mechanism is needed to cooperate with the above-mentioned linkage members to lock the whole baby stroller, effectively solving the problems in the prior art that at least two or more sets of frame locking mechanisms are required to lock the whole baby stroller, resulting in numerous operation steps, complex structure, high manufacturing cost and being not conducive to market promotion. That is, the present utility model is easy to operate, has low manufacturing cost and is convenient for market promotion.

[0030] 3. In order to make the overall structure of the baby stroller more compact and minimize the volume after folding, the rear seat board is directly or indirectly fixedly connected to the lower end of the push rod assembly, and the front end of the rear seat board is rotatably connected to the rear end of the front seat board; the upper end of the seat linkage member is rotatably connected to the middle or front part of the front seat board, and the lower end of the seat linkage member is directly or indirectly movably connected to the support linkage assembly or the support driving member.

[0031] 4. In order to realize automatic folding of the stroller, an upper push rod elastic reset member for driving the upper push rod to automatically turn upward and fold relative to the lower push rod is provided between the lower end of the upper push rod and the upper end of the lower push rod.

Description of the Drawings

[0032] The following further details the specific embodiments of the present utility model with reference to the drawings, where:

[0033] Figure 1 It is one of the three-dimensional structure schematic diagrams of the present utility model when it is in the unfolded and in-use state.

[0034] Figure 2 It is the second three-dimensional structure schematic diagram of the present utility model when it is in the unfolded and in-use state.

[0035] Figure 3 It is the third three-dimensional structure schematic diagram of the present utility model when it is in the unfolded and in-use state.

[0036] Figure 4 It is the fourth three-dimensional structure schematic diagram of the present utility model when it is in the unfolded and in-use state.

[0037] Figure 5 It is the side view structure schematic diagram of the present utility model when it is in the unfolded and in-use state.

[0038] Figure 6 It is one of the three-dimensional structure schematic diagrams of the present utility model when it is in the folded and in-use state.

[0039] Figure 7 It is the second three-dimensional structure schematic diagram of the present utility model when it is in the folded and in-use state.

[0040] Figure 8This is a schematic side view structure diagram of the present utility model when it is in the folded and in-use state.

Specific Embodiment

[0041] The following will describe in detail the embodiments of the present utility model with reference to the accompanying drawings.

[0042] As Figure 1-8 shown, a children's stroller with convenient unfolding and folding of the present utility model can be correspondingly switched between the unfolded and in-use state and the folded and in-use state, and includes:

[0043] The front foot rod 1, and the lower end of the front foot rod 1 is connected with a front wheel set;

[0044] The rear foot rod 2, the lower end of the rear foot rod 2 is connected with a rear wheel set, and the upper end of the rear foot rod 2 is rotatably connected with the upper end of the front foot rod 1;

[0045] The push rod assembly 3, the lower end of the push rod assembly 3 is rotatably connected with the upper end of the front foot rod 1 or the upper end of the rear foot rod 2;

[0046] The support linkage assembly 4, the front end of the support linkage assembly 4 is movably connected with the front foot rod 1, and the rear end of the support linkage assembly 4 is movably connected with the rear foot rod 2;

[0047] The support driving member 5, the upper end of the support driving member 5 is movably connected with the lower part of the push rod assembly 3, and the lower end of the support driving member 5 is movably connected with the support linkage assembly 4;

[0048] The armrest assembly 6, the corresponding end of the armrest assembly 6 is rotatably connected with the upper end of the front foot rod 1 or the upper end of the rear foot rod 2 or the lower end of the push rod assembly 3;

[0049] The armrest linkage 71, the upper end of the armrest linkage 71 is movably connected with the armrest assembly 6, the lower end of the armrest linkage 71 is movably connected with the support linkage assembly 4 or the support driving member 5, and the support linkage assembly 4 is configured to be correspondingly driven by the support driving member 5 during the folding process of the push rod assembly 3 relative to the rear foot rod 2 to drive the front foot rod 1 to flip and approach the rear foot rod 2 for folding, and the support linkage assembly 4 or the support driving member 5 drives the armrest assembly 6 to flip and approach the rear foot rod 2 for folding through the armrest linkage 71;

[0050] The frame locking mechanism is located between the front foot rod 1 or the rear foot rod 2 and the push rod assembly 3 for locking the push rod assembly 3 relative to the corresponding front foot rod 1 or rear foot rod 2;

[0051] Frame unlocking mechanism, the frame unlocking mechanism is located on the push rod assembly 3 and is used to link the unlocking action of the frame locking mechanism, thereby releasing the locking state of the push rod assembly 3 relative to the front foot rod 1 or the rear foot rod 2. When the present utility model is folded, the frame unlocking mechanism is operated to link the frame locking mechanism to release the locking state of the push rod assembly relative to the rear foot rod. Then, the push rod assembly is operated to flip downward relative to the rear foot rod and move closer to the rear foot rod side for folding. During the folding process of the push rod assembly, the push rod assembly drives the support linkage assembly to act accordingly through the support driving member, so that the support linkage assembly links the front foot rod to flip backward relative to the rear foot rod and move closer to the rear foot rod side for folding. At the same time, the support linkage assembly links the armrest assembly to flip downward relative to the rear foot rod and move closer to the rear foot rod side for folding through the armrest linkage member, as Figure 6-8 shown. Therefore, the user only needs to manually operate the unlocking action of the frame unlocking mechanism to unlock the entire baby stroller. It has the characteristics of convenient unlocking operation, smooth unfolding and folding, and stable and reliable structure.

[0052] In order to facilitate the operation of unfolding and using the baby stroller, the support linkage assembly 4 is configured to be driven accordingly by the support driving member 5 to link the front foot rod 1 to flip and unfold relative to the rear foot rod 2 during the flipping and unfolding process of the push rod assembly 3 relative to the rear foot rod 2, and the support linkage assembly 4 or the support driving member 5 links the armrest assembly 6 to flip and unfold relative to the rear foot rod 2 through the armrest linkage member 71.

[0053] As Figure 1-8 shown, in order to improve the structural stability and linkage, a transverse link 7 is further included. The transverse link 7 is located between the two support linkage assemblies 4 and is respectively connected to the two support linkage assemblies 4. The lower end of the armrest linkage member 71 is rotatably connected to the transverse link 7. The support linkage assembly 4 is configured to be driven accordingly by the support driving member 5 to link the front foot rod 1 to flip and fold closer to the rear foot rod 2 during the flipping and folding process of the push rod assembly 3 relative to the rear foot rod 2, and the support linkage assembly 4 links the armrest assembly 6 to flip and fold closer to the rear foot rod 2 through the transverse link 7 and the armrest linkage member 71. In this embodiment, the two support linkage assemblies 4 are connected by the transverse link 7, which can ensure the synchronous movement of the two support rear linkage members 42 of the two support linkage assemblies 4 while improving its structural stability and ensuring reliable use.

[0054] As Figure 1-8As shown in the figure, in order to ensure reliable linkage, the support linkage assembly 4 includes a front support linkage 41 and a rear support linkage 42 in a V-shaped structure. The connecting end of the rear support linkage 42 is rotatably connected to the middle part of the rear foot rod 2. The upper branch end of the rear support linkage 42 is rotatably connected to the lower end of the support driving member 5. The lower branch end of the rear support linkage 42 is rotatably connected to the rear end of the front support linkage 41. The front end of the front support linkage 41 is rotatably connected to the middle or upper part of the front foot rod 1. The lower end of the armrest linkage 71 is directly or indirectly rotatably connected to the lower branch end of the rear support linkage 42. Among them, the lower end of the armrest linkage 71 is rotatably connected to the transverse link 7, and the corresponding end of the transverse link 7 is fixedly connected to the lower branch end of the rear support linkage 42 relatively, as Figure 2-4 shown. When folding, operate the frame unlocking mechanism to drive the frame locking mechanism to release the locking state of the push rod assembly relative to the rear foot rod. Then, operate the push rod assembly to turn downward relative to the rear foot rod and move closer to the rear foot rod side for folding. During the folding process of the push rod assembly, the push rod assembly drives the upper branch end of the support driving member and the rear support linkage 42 to drive the rear support linkage 42 to turn downward around the rotation axis between the connecting end of the rear support linkage 42 and the rear foot rod 2, that is, the lower branch end of the rear support linkage 42 drives the front foot rod 1 to turn backward relative to the rear foot rod through the front support linkage 41 and move closer to the rear foot rod side for folding. At the same time, the lower branch end of the rear support linkage 42 drives the armrest assembly to turn downward relative to the rear foot rod through the transverse link and the armrest linkage and move closer to the rear foot rod side (it can also move closer to the front foot rod side), and drives the front seat plate 81 to turn downward relative to the rear seat plate 82 through the transverse link and the seat linkage 72 and move closer to the front foot rod side for folding, as Figure 6-8 shown.

[0055] As Figure 1-8 shown, in order to ensure reliable connection and safety, it further includes a joint connection seat 21. The middle part of the joint connection seat 21 is arranged at the upper end of the rear foot rod 2. The front end of the joint connection seat 21 is rotatably connected to the upper end of the front foot rod 1. The rear part of the joint connection seat 21 is rotatably connected to the lower end of the push rod assembly 3. The frame locking mechanism is located between the joint connection seat 21 and the push rod assembly 3 for locking the push rod assembly 3 relative to the joint connection seat 21. In this embodiment, the joint connection seat 21 is detachably connected to the upper end of the rear foot rod 2, which is convenient for mold opening production and reduces the mold opening difficulty.

[0056] For reliable locking, the frame locking mechanism includes a frame locking groove respectively provided at the joint connecting seat 21 and the lower end of the push rod assembly 3, and a frame locking gear that is axially slidably provided between the joint connecting seat 21 and the lower end of the push rod assembly 3 and can be simultaneously engaged with the frame locking grooves at the joint connecting seat 21 and the lower end of the push rod assembly 3. A frame locking elastic member is provided between the frame locking gear and the joint connecting seat 21 for keeping the frame locking gear simultaneously engaged with the frame locking grooves at the joint connecting seat 21 and the lower end of the push rod assembly 3; the frame locking gear is configured to be linked to perform an unlocking action by the frame unlocking mechanism, which is not shown in the figure. Alternatively, for the specific structure of the frame locking mechanism, reference can be made to: Chinese Patent Application No. CN202021244213.6 for a locking mechanism of a folding joint of a baby carriage, and Chinese Patent Application No. CN201710450112.0 for an infant stroller, etc.

[0057] For convenient unlocking, the frame unlocking mechanism includes a frame unlocking rotating seat rotatably provided between the lower end of the push rod assembly 3 and the frame locking gear. Frame unlocking inclined surfaces that can cooperate with each other and are used to drive the frame unlocking rotating seat to slide correspondingly during the rotation of the frame unlocking rotating seat are respectively provided on the frame unlocking rotating seat and the lower end of the push rod assembly 3; the frame unlocking mechanism further includes a frame unlocking member movably provided on the push rod assembly 3 and a frame unlocking linkage member provided on the push rod assembly 3. One end of the frame unlocking linkage member is connected to the frame unlocking member, and the other end of the frame unlocking linkage member is connected to the frame unlocking rotating seat, which is not shown in the figure. When unlocking, operate the frame unlocking linkage member to move relative to the push rod assembly correspondingly, then the frame unlocking linkage member drives the frame unlocking rotating seat to rotate correspondingly through the frame unlocking linkage member. At this moment, the frame unlocking inclined surfaces of the frame unlocking rotating seat and the lower end of the push rod assembly 3 are abutted and cooperated with each other to drive the frame unlocking rotating seat to push the frame locking gear to slide towards the joint connecting seat 21 side, so that the frame locking gear is separated from the frame locking groove at the lower end of the push rod assembly to release the locking state of the push rod assembly relative to the joint connecting seat 21, and the unlocking is convenient.

[0058] As Figure 1-8 shown, in order to make the overall structure of the baby carriage more compact and minimize the volume after folding, it further includes a seat portion 8 and a seat linkage member 72. The seat portion 8 includes a front seat board 81 and a rear seat board 82. The rear seat board 82 is directly or indirectly fixedly connected to the lower end of the push rod assembly 3. The front end of the rear seat board 82 is rotatably connected to the rear end of the front seat board 81; the upper end of the seat linkage member 72 is rotatably connected to the middle or front part of the front seat board 81, and the lower end of the seat linkage member 72 is directly or indirectly movably connected to the support linkage assembly 4 or the support driving member 5. As Figure 4As shown, the rear seat board 82 is fixedly connected to the lower end of the push rod assembly through the rear seat link. Among them, the lower end of the seat linkage 72 is rotatably connected to the lateral link 7. The seat linkage 72 is located inside the armrest linkage 71. The corresponding end of the lateral link 7 is fixedly connected to the lower branch end of the support rear linkage 42, as Figure 2-4 shown.

[0059] As Figure 1-8 shown, in order to make the overall structure of the stroller more compact and minimize the volume when folded, the push rod assembly 3 includes a lower push rod 31 whose lower end is rotatably connected to the upper end of the rear foot rod 2. The upper end of the lower push rod 31 is movably connected with an upper push rod 32. An upper push rod locking mechanism 33 for locking the upper push rod 32 relative to the lower push rod 31 is provided between the upper push rod 32 and the lower push rod 31. An upper push rod unlocking mechanism 34 for linking the unlocking action of the upper push rod locking mechanism 33 is provided on the upper push rod 32. The frame unlocking mechanism is configured to be linked by the upper push rod 32 when the upper push rod 32 moves and folds relative to the lower push rod 31 to a preset position, and then the frame unlocking mechanism links the unlocking action of the frame locking mechanism.

[0060] For convenient folding, the lower end of the upper push rod 32 is rotatably connected to the upper end of the lower push rod 31. An upper push rod elastic reset member for driving the upper push rod 32 to automatically turn upward and fold relative to the lower push rod 31 is provided between the lower end of the upper push rod 32 and the upper end of the lower push rod 31, which is not shown in the figure. Among them, for the locking and unlocking structures of the push rod assembly, reference can be made to: A stroller frame with convenient folding, Chinese Patent No. 202323413075.6.

[0061] As Figure 6-8 shown, in order to ensure the stable standing of the stroller, during the process of the stroller switching from the unfolded use state to the folded use state, the front wheel set, the rear wheel set and the upper end of the push rod assembly 3 are simultaneously supported on the support surface so that the stroller is in the standing folded use state.

Claims

1. A baby stroller that is convenient for unfolding and folding, which can be switched between the unfolded state for use and the folded state for use accordingly, and is characterized in that include: A front foot rod (1), the lower end of which is connected to a front wheel set; A rear foot rod (2), the lower end of the rear foot rod (2) is connected to a rear wheel set, and the upper end of the rear foot rod (2) is rotatably connected to the upper end of the front foot rod (1); A push rod assembly (3), wherein the lower end of the push rod assembly (3) is rotatably connected to the upper end of the front foot rod (1) or the upper end of the rear foot rod (2); A supporting linkage assembly (4), wherein the front end of the supporting linkage assembly (4) is movably connected to the front foot rod (1), and the rear end of the supporting linkage assembly (4) is movably connected to the rear foot rod (2); A support driving member (5), wherein the upper end of the support driving member (5) is movably connected to the lower part of the push rod assembly (3), and the lower end of the support driving member (5) is movably connected to the support linkage assembly (4); An armrest assembly (6), wherein the corresponding end of the armrest assembly (6) is rotatably connected to the upper end of the front foot rod (1) or the upper end of the rear foot rod (2) or the lower end of the push rod assembly (3); An armrest linkage member (71), wherein the upper end of the armrest linkage member (71) is movably connected to the armrest assembly (6), and the lower end of the armrest linkage member (71) is movably connected to the support linkage member (4) or the support driving member (5), wherein the support linkage member (4) is configured to be driven by the support driving member (5) when the push rod assembly (3) is turned over and folded relative to the rear foot rod (2) so as to link the front foot rod (1) to turn, close together and fold relative to the rear foot rod (2), and the support linkage member (4) or the support driving member (5) links the armrest assembly (6) to turn, close together and fold relative to the rear foot rod (2) through the armrest linkage member (71); A frame locking mechanism, the frame locking mechanism is located between the front foot rod (1) or the rear foot rod (2) and the push rod assembly (3) and is used to lock the push rod assembly (3) relative to the corresponding front foot rod (1) or the rear foot rod (2); A frame unlocking mechanism is located on the push rod assembly (3) and is used to link the unlocking action of the frame locking mechanism, thereby releasing the locking state of the push rod assembly (3) relative to the front foot rod (1) or the rear foot rod (2).

2. The foldable and unfoldable child stroller according to claim 1, wherein The support linkage assembly (4) is configured to be driven by the support driving member (5) when the push rod assembly (3) is flipped and unfolded relative to the rear foot rod (2), thereby linking the front foot rod (1) to flip and unfold relative to the rear foot rod (2), and the support linkage assembly (4) or the support driving member (5) is linked to the handrail assembly (6) to flip and unfold relative to the rear foot rod (2) through the handrail linkage member (71).

3. The foldable and unfoldable child stroller according to claim 1, wherein It also includes a transverse connecting rod (7), which is located between the two supporting linkage assemblies (4) and is respectively connected to the two supporting linkage assemblies (4); the lower end of the armrest linkage member (71) is rotatably connected to the transverse connecting rod (7), and the supporting linkage assembly (4) is configured to be driven by the supporting driving member (5) when the push rod assembly (3) is turned over and folded relative to the rear foot rod (2), so as to link the front foot rod (1) to turn over, close together and fold relative to the rear foot rod (2), and the supporting linkage assembly (4) links the armrest assembly (6) to turn over, close together and fold relative to the rear foot rod (2) through the transverse connecting rod (7) and the armrest linkage member (71).

4. The foldable and unfoldable child stroller according to claim 1, wherein The support linkage assembly (4) includes a front support linkage (41) and a rear support linkage (42) in a V-shaped structure. The connected end of the rear support linkage (42) is rotatably connected to the middle of the rear foot rod (2). The upper branch end of the rear support linkage (42) is rotatably connected to the lower end of the support driving member (5). The lower branch end of the rear support linkage (42) is rotatably connected to the rear end of the front support linkage (41). The front end of the front support linkage (41) is rotatably connected to the middle or upper part of the front foot rod (1). The lower end of the armrest linkage (71) is directly or indirectly rotatably connected to the lower branch end of the rear support linkage (42).

5. The foldable and unfoldable child stroller according to claim 1, wherein It further includes a joint connection seat (21). The middle of the joint connection seat (21) is provided at the upper end of the rear foot rod (2). The front end of the joint connection seat (21) is rotatably connected to the upper end of the front foot rod (1). The rear part of the joint connection seat (21) is rotatably connected to the lower end of the push rod assembly (3). The vehicle frame locking mechanism is located between the joint connection seat (21) and the push rod assembly (3) for locking the push rod assembly (3) relative to the joint connection seat (21).

6. The foldable and unfoldable child stroller according to claim 5, wherein The vehicle frame locking mechanism includes a vehicle frame locking groove respectively provided at the joint connection seat (21) and the lower end of the push rod assembly (3), and a vehicle frame locking gear slidably provided axially between the joint connection seat (21) and the lower end of the push rod assembly (3) and capable of being simultaneously engaged with the vehicle frame locking grooves at the joint connection seat (21) and the lower end of the push rod assembly (3). A vehicle frame locking elastic member is provided between the vehicle frame locking gear and the joint connection seat (21) for keeping the vehicle frame locking gear simultaneously engaged with the vehicle frame locking grooves at the joint connection seat (21) and the lower end of the push rod assembly (3). The vehicle frame locking gear is configured to be linked to perform an unlocking action by the vehicle frame unlocking mechanism.

7. The foldable and extendable baby stroller according to claim 6, wherein The vehicle frame unlocking mechanism includes a vehicle frame unlocking rotating seat rotatably provided between the lower end of the push rod assembly (3) and the vehicle frame locking gear. The vehicle frame unlocking rotating seat and the lower end of the push rod assembly (3) are respectively provided with vehicle frame unlocking inclined surfaces that can cooperate with each other and are used to drive the vehicle frame unlocking rotating seat to slide correspondingly during the rotation of the vehicle frame unlocking rotating seat. The vehicle frame unlocking mechanism further includes a vehicle frame unlocking member movably provided on the push rod assembly (3) and a vehicle frame unlocking linkage provided on the push rod assembly (3). One end of the vehicle frame unlocking linkage is connected to the vehicle frame unlocking member, and the other end of the vehicle frame unlocking linkage is connected to the vehicle frame unlocking rotating seat.

8. The folding and unfolding convenient baby stroller according to any one of claims 1-7, characterized in that It further includes a seat part (8) and a seat linkage (72). The seat part (8) includes a front seat plate (81) and a rear seat plate (82). The rear seat plate (82) is directly or indirectly fixedly connected to the lower end of the push rod assembly (3). The front end of the rear seat plate (82) is rotatably connected to the rear end of the front seat plate (81). The upper end of the seat linkage (72) is rotatably connected to the middle or front part of the front seat plate (81). The lower end of the seat linkage (72) is directly or indirectly movably connected to the support linkage assembly (4) or the support driving member (5).

9. The foldable and unfoldable child stroller according to any one of claims 1-7, characterized in that The push rod assembly (3) includes a lower push rod (31) whose lower end is rotatably connected to the upper end of the rear foot rod (2). The upper end of the lower push rod (31) is movably connected with an upper push rod (32). An upper push rod locking mechanism (33) for locking the upper push rod (32) relative to the lower push rod (31) is provided between the upper push rod (32) and the lower push rod (31). An upper push rod unlocking mechanism (34) for linking the unlocking action of the upper push rod locking mechanism (33) is provided on the upper push rod (32). The frame unlocking mechanism is configured to be correspondingly linked by the upper push rod (32) when the upper push rod (32) is movably folded relative to the lower push rod (31) to a preset position, so as to further link the unlocking action of the frame locking mechanism by the frame unlocking mechanism.

10. The foldable and extendable baby stroller according to claim 9, wherein The lower end of the upper push rod (32) is rotatably connected to the upper end of the lower push rod (31). An upper push rod elastic reset member for driving the upper push rod (32) to automatically turn upward and fold relative to the lower push rod (31) is provided between the lower end of the upper push rod (32) and the upper end of the lower push rod (31).

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