A folding stroller

Abstract

The application discloses a folding convenient child's car, which comprises a frame, a seat frame, a seat frame locking control assembly and a seat frame joint assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to a folding stroller.

BACKGROUND

[0002] Strollers have become an indispensable product in the growth process of infants. Many strollers on the market currently include a folding stroller frame and a seat frame connected to the stroller frame.

[0003] At the present stage, in the folding process of the stroller, the backrest part of the seat frame is usually unlocked, the backrest part is rotated to the seat part of the seat frame to unlock the seat part, then the seat frame as a whole is rotated to the front leg rod to close, to unlock the stroller frame to make the stroller frame fold; however, since the center of gravity of the stroller is basically located between the front leg rod and the rear leg rod, and the distance between the two front leg rods is basically smaller than the distance between the two rear leg rods, when the seat frame is rotated to fold to the side of the front leg rod, the seat frame is rested on the front side of the front leg rod, at this moment the center of gravity of the stroller moves to the side of the front leg rod, making the front leg rod part relatively heavier than the rear leg rod part, so that it is difficult to rotate the front leg rod and the seat frame to the side of the rear leg rod to close, and there are problems of difficulty in stable standing of the folded stroller and relatively large overall volume, and inconvenience in folding.

[0004] Therefore, the present application is proposed in view of the above problems.

SUMMARY OF THE INVENTION

[0005] The present application aims to overcome the shortcomings of the prior art, and provides a folding stroller, when the seat frame is connected to the stroller frame in front, after the seat frame joint assembly is unlocked, the backrest part is folded to a preset angle in the direction of the seat part to unlock the seat frame locking control assembly, the seat frame as a whole is rotated to the front leg rod to close, and then the seat frame as a whole is rotated to the rear leg rod, and is rotated to a preset angle to unlock the stroller frame joint assembly, and then the stroller frame is folded, so that the present application only needs to manually unlock the seat frame joint assembly, and then fold the seat frame to unlock the seat frame locking control assembly and the stroller frame joint assembly to complete the folding of the stroller as a whole, which is convenient, safe and reliable.

[0006] The present application is achieved by the following technical solutions:

[0007] A folding stroller, comprising:

[0008] A stroller frame 1, the stroller frame 1 comprising a front leg rod 11, a rear leg rod 12 and a push rod 13, the front leg rod 11, the rear leg rod 12 and the push rod 13 being connected by a stroller frame joint assembly 3 to make the stroller frame 1 foldable, the lower end of the front leg rod 11 being connected with a front wheel set, the lower end of the rear leg rod 12 being connected with a rear wheel set, and the upper end of the push rod 13 being connected with a handlebar rod 14;

[0009] a seat frame 2, which is detachably connected to the frame 1 forwardly or rearwardly, the seat frame 2 comprising a seat portion 21 and a backrest portion 22, the seat portion 21 and the backrest portion 22 being connected by a seat frame joint assembly 4 so that the seat frame 2 can be folded or unfolded;

[0010] a seat frame locking control assembly 5 being provided between the seat frame 2 and the frame 1;

[0011] when the seat frame 2 is connected to the frame 1 forwardly, the backrest portion 22 is folded to a preset angle toward the seat portion 21 after the seat frame joint assembly 4 is unlocked, thereby unlocking the seat frame locking control assembly 5, so that the seat frame 2 is folded toward the front leg 11 as a whole, and then the seat frame 2 folded as a whole is flipped toward the rear leg 12 to a preset angle, thereby unlocking the frame joint assembly 3, and further folding the frame 1.

[0012] when the seat frame 2 is connected to the frame 1 rearwardly, the backrest portion 22 is folded to a preset angle toward the seat portion 21 after the seat frame joint assembly 4 is unlocked, thereby unlocking the seat frame locking control assembly 5, so that the seat frame 2 is folded toward the rear leg 12 as a whole, and the seat frame 2 folded as a whole is flipped toward the rear leg 12 to a preset angle, thereby unlocking the frame joint assembly 3, and further folding the frame 1.

[0013] The folding convenient child vehicle as described above, the frame joint assembly 3 is configured to be unlocked by the backrest portion 22.

[0014] The folding convenient child vehicle as described above, when the frame 1 is completely folded and in a standing state, the front wheel set, the rear wheel set and the handlebar 14 end portion simultaneously abut on the same plane.

[0015] The folding convenient child vehicle as described above, the frame joint assembly 3 comprises a rear joint seat 32 provided on the upper end of the rear leg 12, a front joint seat 31 provided on the upper end of the front leg 11 and rotatably connected with the rear joint seat 32, and a push joint seat 33 provided on the lower end of the push rod 13 and rotatably connected with the rear joint seat 32, a same-motion member 34 being provided between the push joint seat 33 and the front joint seat 31 for simultaneously rotating the push joint seat 33 and the front joint seat 31 toward or away from each other; the frame joint assembly 3 further comprises a frame locking mechanism 35 for locking the front joint seat 31 and / or the push joint seat 33 relative to the rear joint seat 32, the frame locking mechanism 35 being configured to be unlocked by the seat frame 2.

[0016] A folding stroller as described above, the front joint base 31 and the rear joint base 32 are hinged at point A, the push joint base 33 and the rear joint base 32 are hinged at point B; the same moving part 34 is eccentrically hinged at point C with the front joint base 31 at the front end, and is eccentrically hinged at point D with the push joint base 33 at the rear end, and the line connecting points C and D has an included angle with the line connecting points A and B.

[0017] A folding stroller as described above, the stroller frame locking mechanism 35 includes a stroller frame locking notch 351 provided on the front joint base 31 and / or the push joint base 33, and a stroller frame locking block 352 slidably provided on the rear joint base 32 and capable of being clamped into the stroller frame locking notch 351 to lock the front joint base 31 and the push joint base 33 relative to the rear joint base 32 in the unfolded state, and a stroller frame elastic member 353 is provided between the stroller frame locking block 352 and the rear joint base 32 to enable the stroller frame locking block 352 to be elastically clamped into the stroller frame locking notch 351; the operating end of the stroller frame locking block 352 is exposed outside the rear joint base 32, and the operating end of the stroller frame locking block 352 is configured to be linked with the seat frame 2 to release the stroller frame locking mechanism 35.

[0018] A folding stroller as described above, a front reset elastic member 311 is provided between the front joint base 31 and the rear joint base 32 for driving the front joint base 31 to rotate back relative to the rear joint base 32, and / or a push reset elastic member 331 is provided between the push joint base 33 and the rear joint base 32 for driving the push joint base 33 to rotate back relative to the rear joint base 32.

[0019] A folding stroller as described above, the upper part of the push rod 13 is further independently provided with a stroller frame unlocking mechanism 36 for releasing the stroller frame joint assembly 3.

[0020] A folding stroller as described above, the stroller frame unlocking mechanism 36 includes a stroller frame unlocking block 361, a stroller frame unlocking pull rope 362, and a stroller frame operating member 363, the middle part of the stroller frame unlocking block 361 is rotatably connected with the push joint base 33, the unlocking end of the stroller frame unlocking block 361 is used to link the release of the stroller frame joint assembly 3, the connecting end of the stroller frame unlocking block 361 is connected with the stroller frame operating member 363 through the stroller frame unlocking pull rope 362, the stroller frame operating member 363 is movably provided on the upper part of the push rod 13, and the stroller frame operating member 363 and the push rod 13 are provided with an operating member safety locking mechanism 37.

[0021] As described above, the folding convenient stroller, the operating member safety locking mechanism 37 comprises an operating member locking hole 371 arranged on the upper part of the push rod 13 and an operating member locking block 372 rotatably connected with the stroller operating member 363, the operating member locking block 372 has a locking end and an operating end, the locking end of the operating member locking block 372 can be inserted into the operating member locking hole 371 to lock the stroller operating member 363, and the operating end of the operating member locking block 372 is arranged between the stroller operating member 363 and the operating member locking block 372 and is provided with a locking block elastic member 373 capable of elastically inserting the locking end of the operating member locking block 372 into the operating member locking hole 371.

[0022] As described above, the folding convenient stroller, the seat frame joint assembly 4 comprises a seat joint seat 52 arranged on the seat part 21, a plurality of backrest locking notches 41 are circumferentially and spacedly arranged on the seat joint seat 52, and a backrest locking clavus 42 for being inserted into the backrest locking notches 41 is slidably arranged on the backrest part 22, and a backrest locking elastic member is arranged between the backrest locking clavus 42 and the backrest part 22 and is capable of elastically inserting the backrest locking clavus 42 into the backrest locking notches 41.

[0023] As described above, the folding convenient stroller, the seat frame joint assembly 4 further comprises a backrest unlocking handle 44 rotatably arranged on the backrest part 22 and a backrest unlocking pull rope 43 arranged on the backrest part 22 and used for connecting the backrest unlocking handle 44 and the backrest locking clavus 42.

[0024] As described above, the folding convenient stroller, the seat frame locking control assembly 5 comprises a seat support seat 51 detachably arranged on the stroller joint assembly 3, a seat joint seat 52 arranged on the seat part 21 and rotatably connected with the seat support seat 51, and a backrest joint seat 53 arranged on the backrest part 22 and rotatably connected with the seat joint seat 52, and the backrest joint seat 53 is located between the seat support seat 51 and the seat joint seat 52; the seat frame locking control assembly 5 further comprises seat locking tooth grooves 54 respectively arranged on the opposite sides of the seat joint seat 52 and the seat support seat 51, a seat locking gear 55 arranged between the seat joint seat 52 and the seat support seat 51 and capable of being simultaneously clamped into the seat locking tooth grooves 54 of the seat joint seat 52 and the seat support seat 51, and a seat locking elastic member 56 arranged between the seat locking gear 55 and the seat joint seat 52 and used for elastically pressing the seat locking gear 55 to make the seat locking gear 55 simultaneously clamped into the seat locking tooth grooves 54 of the seat joint seat 52 and the seat support seat 51; the seat locking gear 55 is configured to be linked by the backrest joint seat 53 to make the seat locking gear 55 disengage from the seat locking tooth grooves 54 of the seat support seat 51 when the angle between the backrest part 22 and the seat part 21 gradually decreases.

[0025] The folding convenient child's vehicle as described above, the seat locking gear 55 is provided with a gear unlocking protrusion 551, and the inner wall of the backrest joint seat 53 is provided with a protrusion unlocking inclined wall 531 for abutting and cooperating with the gear unlocking protrusion 551 to drive the seat locking gear 55 to slide along the axial direction when the angle between the backrest part 22 and the seat part 21 gradually decreases, so that the seat locking gear 55 is separated from the seat locking gear slot 54 of the seat support seat 51.

[0026] The folding convenient child's vehicle as described above, the seat frame 2 further comprises a handrail part 23 rotatably arranged on the seat part 21 and the front side of the backrest part 22, and the handrail part 23 and the seat part 21 are provided with a handrail locking mechanism 24 for locking the handrail part 23 relative to the seat part 21, and the handrail locking mechanism 24 is configured to be released by the backrest part 22 when the angle between the backrest part 22 and the seat part 21 gradually decreases.

[0027] The folding convenient child's vehicle as described above, the handrail locking mechanism 24 comprises a handrail joint seat 241 rotatably connected with the seat part 21, the handrail joint seat 241 is provided with a handrail locking groove 242, the seat part 21 is provided with a handrail locking block 243, the middle part of the handrail locking block 243 is rotatably connected with the seat part 21, the locking end of the handrail locking block 243 can be inserted into the handrail locking groove 242 to lock the handrail joint seat 241 relative to the seat part 21, and the locking end of the handrail locking block 243 and the seat part 21 are provided with a handrail elastic element 244 for elastically inserting the locking end of the handrail locking block 243 into the handrail locking groove 242; the backrest part 22 is provided with a handrail unlocking block 245 for pressing the operating end of the handrail locking block 243 to make the locking end of the handrail locking block 243 separate from the handrail locking groove 242 when the angle between the backrest part 22 and the seat part 21 gradually decreases.

[0028] The folding convenient child's vehicle as described above, the handrail joint seat 241 and the seat part 21 are provided with a handrail reset elastic element 246 for elastically rotating and resetting the handrail joint seat 241 relative to the seat part 21.

[0029] The folding convenient child's vehicle as described above, the handlebar 14 is telescopically and adjustably connected to the upper end of the push rod 13.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] 1、The seat frame is connected to the frame forwardly, the user releases the lock of the seat frame joint assembly, then folds the backrest part to a preset angle towards the seat part, and releases the lock of the seat frame locking control assembly, so that the whole seat frame is folded towards the front leg, then the folded seat frame is turned to the rear leg, and is turned to a preset angle to release the lock of the frame joint assembly, so that the frame is folded, thereby completing the overall folding of the child stroller, so that the overall folding of the child stroller can be completed by manually releasing the lock of the seat frame joint assembly, then folding the seat frame to release the lock of the seat frame locking control assembly and the frame joint assembly, which is convenient and safe and reliable.

[0032] 2、In order to make the frame stand stably on a plane after being folded, the front wheel set, the rear wheel set and the handlebar end are in contact with the same plane when the frame is in a standing state after being folded, so that the user can easily operate the lifting handle of the seat part.

[0033] 3、The same moving piece is arranged between the push joint seat and the front joint seat to simultaneously move the push joint seat and the front joint seat towards or away from each other, and compared with the gear same moving mechanism in the prior art, the same moving piece can reduce the assembly difficulty and the manufacturing cost.

[0034] 4、The frame unlocking mechanism and the operation piece safety locking mechanism are matched to realize the double-lock function, avoid misoperation, and ensure safety.

DRAWINGS

[0035] The specific embodiments of the present application will be further described in detail below with reference to the drawings, in which:

[0036] Figure 1 It is one of the perspective views of the present application.

[0037] Figure 2 It is the second perspective view of the present application.

[0038] Figure 3 It is a side view of the frame and the seat frame in the unfolded state.

[0039] Figure 4 It is a side view of the frame in the unfolded state and the seat frame in the folded state.

[0040] Figure 5 It is a side view of the present application in the folded state.

[0041] Figure 6 It is a perspective view of the present application in the folded state.

[0042] Figure 7 It is a structural schematic view of the frame joint assembly in the present application.

[0043] Figure 8 This is an exploded view of the frame joint assembly in this invention.

[0044] Figure 9 This is a schematic diagram of the frame locking block in this invention.

[0045] Figure 10 This is a cross-sectional view of the safety locking mechanism for the operating component in this invention.

[0046] Figure 11 This is a perspective view of the frame in this invention.

[0047] Figure 12 This is one of the exploded views of the seat locking control component in this invention.

[0048] Figure 13 This is the second exploded view of the seat locking control component in this invention.

[0049] Figure 14 This is a schematic diagram of the backrest joint seat in this invention.

[0050] Figure 15 This is a schematic diagram of the seat locking gear in this invention.

[0051] Figure 16 This is one of the exploded views of the handrail locking mechanism in this invention.

[0052] Figure 17 This is the second exploded view of the handrail locking mechanism in this invention.

Detailed Implementation Methods

[0053] The following is in conjunction with the appendix Figures 1-17 The embodiments of the present invention will be described in detail.

[0054] like Figures 1-13 As shown, the present invention provides a foldable stroller, comprising:

[0055] The frame 1 includes a front leg 11, a rear leg 12, and a push rod 13. The front leg 11, the rear leg 12, and the push rod 13 are connected by a frame joint assembly 3, allowing the frame 1 to be extended or retracted. The lower end of the front leg 11 is connected to the front wheel assembly, the lower end of the rear leg 12 is connected to the rear wheel assembly, and the upper end of the push rod 13 is connected to the handlebar 14.

[0056] Seat frame 2, which can be detachably connected to the frame 1 in a forward or backward direction, the seat frame 2 includes a seat part 21 and a backrest 22, the seat part 21 and the backrest 22 are connected by a seat frame joint assembly 4 so that the seat frame 2 can be folded up and down;

[0057] A seat frame locking control assembly 5 is provided between the seat frame 2 and the vehicle frame 1;

[0058] When the seat frame 2 is connected to the frame 1 forwardly, the seat frame joint assembly 4 is unlocked, then the backrest 22 is folded toward the seat 21 to a preset angle, and the seat frame locking control assembly 5 is unlocked, so that the seat frame 2 is folded toward the front leg 11, and the seat frame 2 is turned toward the rear leg 12 to a preset angle, and the frame joint assembly 3 is unlocked, so that the frame 1 is folded.

[0059] When the seat frame 2 is connected to the frame 1 backwardly, the seat frame joint assembly 4 is unlocked, then the backrest 22 is folded toward the seat 21 to a preset angle, and the seat frame locking control assembly 5 is unlocked, so that the seat frame 2 is folded toward the rear leg 12, and the seat frame 2 is turned toward the rear leg 12 to a preset angle, and the frame joint assembly 3 is unlocked, so that the frame 1 is folded. Therefore, the folding of the whole child stroller can be completed by manually unlocking the seat frame joint assembly, then folding the seat frame and unlocking the seat frame locking control assembly and the frame joint assembly, which is convenient, safe and reliable.

[0060] In the present application, the handlebar 14 is telescopically connected to the upper end of the push rod 13.

[0061] Preferably, in order to be more convenient to unlock, the frame joint assembly 3 is configured to be unlocked by the backrest 22.

[0062] As shown in Figure 5 In order to more stably support the child stroller, when the frame 1 is folded and in a standing state, the front wheel set, the rear wheel set and the end of the handlebar 14 simultaneously abut on the same plane.

[0063] As shown in Figure 7 , 8 In order to be more convenient to fold, the frame joint assembly 3 comprises a rear joint seat 32 arranged at the upper end of the rear leg 12, a front joint seat 31 arranged at the upper end of the front leg 11 and rotatably connected with the rear joint seat 32, and a push joint seat 33 arranged at the lower end of the push rod 13 and rotatably connected with the rear joint seat 32, and a same-motion member 34 arranged between the push joint seat 33 and the front joint seat 31 for simultaneously rotating the push joint seat 33 and the front joint seat 31 toward or away from each other; the frame joint assembly 3 further comprises a frame locking mechanism 35 for locking the front joint seat 31 and / or the push joint seat 33 relative to the rear joint seat 32, and the frame locking mechanism 35 is configured to be unlocked by the seat frame 2.

[0064] As shown in Figure 7 , 8As shown, in order to further improve the linkage effect of the front leg rod and the push rod and improve the structural stability, the front joint seat 31 is hinged to the rear joint seat 32 at point A, and the push joint seat 33 is hinged to the rear joint seat 32 at point B; the front end of the same moving part 34 is eccentrically hinged to the front joint seat 31 at point C, and the rear end of the same moving part 34 is eccentrically hinged to the push joint seat 33 at point D, and the line connecting points C and D has an included angle with the line connecting points A and B. In order to rotate more smoothly, the front end of the same moving part 34 is eccentrically hinged to the front joint seat 31 at point C, and the rear end of the same moving part 34 is eccentrically hinged to the push joint seat 33 at point D, and points C and D are located on the same side of the line connecting points A and B.

[0065] As shown in Figures 7-9 In order to better lock the frame, the frame locking mechanism 35 includes a frame locking notch 351 provided on the front joint seat 31 and / or the push joint seat 33, and a frame locking block 352 slidably provided on the rear joint seat 32 and capable of being clamped into the frame locking notch 351 to lock the front joint seat 31 and the push joint seat 33 relative to the rear joint seat 32 in the unfolded state, and a frame elastic member 353 is provided between the frame locking block 352 and the rear joint seat 32 to enable the frame locking block 352 to be elastically clamped into the frame locking notch 351; the operating end of the frame locking block 352 is exposed outside the rear joint seat 32, and the operating end of the frame locking block 352 is configured to be linked by the seat frame 2 to release the lock of the frame locking mechanism 35. In order to ensure that the operating end of the frame locking block 352 can be linked and released by the frame joint unlocking block 530 of the backrest joint seat 53 when the seat frame is connected to the frame to be folded forward or backward, the operating end of the frame locking block 352 and the frame joint unlocking block 530 are respectively provided with inclined walls / surfaces that cooperate with each other.

[0066] As shown in Figure 8 In order to make it convenient to rotate and fold the frame, a front reset elastic member 311 for driving the front joint seat 31 to rotate and reset relative to the rear joint seat 32 is provided between the front joint seat 31 and the rear joint seat 32, and / or a push reset elastic member 331 for driving the push joint seat 33 to rotate and reset relative to the rear joint seat 32 is provided between the push joint seat 33 and the rear joint seat 32.

[0067] As shown in Figures 1-4 , 8-10, the upper part of the push rod 13 is also independently provided with a frame unlocking mechanism 36 for releasing the frame joint assembly 3. When the seat frame is removed from the frame and replaced with a sleeping frame such as a sleeping basket, the user can unlock the frame joint assembly 3 by operating the frame unlocking mechanism 36, which is convenient to operate.

[0068] As shown in Figures 1-4, 8-10, the frame unlocking mechanism 36 includes frame unlocking block 361, frame unlocking pull rope 362 and frame operating element 363, the frame unlocking block 361 middle part rotatably connected with the push joint seat 33, the frame unlocking block 361 unlocking end for linkage frame joint assembly 3 release lock, the frame unlocking block 361 connecting end through frame unlocking pull rope 362 and frame operating element 363 are connected, the frame operating element 363 movably arranged in the upper part of the push rod 13, the frame operating element 363 and push rod 13 between the operating element safety locking mechanism 37. In the present application, frame unlocking mechanism 36 and operating element safety locking mechanism 37 cooperate to realize two-way lock function, avoid the situation of misoperation, ensure the safety of use.

[0069] As Figures 1-4 , 8-10, the operating element safety locking mechanism 37 includes operating element locking hole 371 arranged on the upper part of the push rod 13 and operating element lock block 372 rotatably connected with the frame operating element 363, the operating element lock block 372 has locking end and operating end, the locking end of the operating element lock block 372 can be inserted into the operating element locking hole 371 to lock the frame operating element 363 relative to the push rod 13, the operating end of the operating element lock block 372 and the frame operating element 363 between the operating element lock block 372 can make the locking end of the elastic element 373 inserted into the operating element locking hole 371. When unlocking, press the operating end of the operating element lock block 372 to rotate to the side of the frame operating element 363, at this moment the locking end of the operating element lock block 372 rotates away from the frame operating element 363 and is separated from the operating element locking hole 371, then operate the frame operating element 363 to slide upward relative to the push rod 13, at this moment the frame operating element 363 pulls the connecting end of the frame unlocking block 361 through the frame unlocking pull rope 362 to make the frame unlocking block 361 rotate relative to the push joint seat 33, then the frame unlocking block 361 presses the frame locking block 352 to slide downward relative to the front joint seat 31 to make the locking end of the frame locking block 352 separate from the frame locking gap 351, then the front rod 11 rotates to the side of the rear rod 12 under the action of the front reset elastic element 311, the push rod 13 rotates to the side of the rear rod 12 under the action of the push reset elastic element 331, thereby completing the folding work of the frame 1.

[0070] As shown in 1-3, 12, 13, the seat frame joint assembly 4 comprises a seat joint base 52 provided on the seat part 21, a plurality of backrest locking notches 41 are circumferentially and spacedly provided on the seat joint base 52, a backrest locking tongue 42 is slidably provided on the backrest part 22 and is used to be inserted into the backrest locking notches 41, a backrest locking elastic member is provided between the backrest locking tongue 42 and the backrest part 22 and can make the backrest locking tongue 42 elastically inserted into the backrest locking notches 41; the seat frame joint assembly 4 further comprises a backrest unlocking handle 44 rotatably provided on the backrest part 22 and a backrest unlocking pull rope 43 provided on the backrest part 22 and used to connect the backrest unlocking handle 44 and the backrest locking tongue 42. When unlocking, the backrest unlocking handle 44 is rotated relative to the backrest part 22, the backrest unlocking handle 44 pulls the backrest locking tongue 42 to slide upward relative to the backrest joint base 53 of the backrest part 22 through the backrest unlocking pull rope 43 so as to be disengaged from the backrest locking notches 41, that is, the backrest part 22 can be rotated relative to the seat part 21. In addition, by inserting and cooperating the backrest locking tongue 42 and the corresponding backrest locking notches 41, the inclination angle of the backrest part 22 can be adjusted, so that the seat frame 2 can meet the riding of children of different body types and provide comfortable riding experience for children.

[0071] As shown in 1-3 and 11-15, to better lock the seat relative to the frame and ensure safety, the seat frame locking control assembly 5 includes a seat support 51 detachably mounted on the frame joint assembly 3, a seat joint seat 52 mounted on the seat 21 and rotatably connected to the seat support 51, and a backrest joint seat 53 mounted on the backrest 22 and rotatably connected to the seat joint seat 52. The backrest joint seat 53 is located between the seat support 51 and the seat joint seat 52. The seat frame locking control assembly 5 also includes seat locking grooves 54 respectively located on the opposite sides of the seat joint seat 52 and the seat support 51. A seat locking gear 55 is provided between the seat joint seat 52 and the seat support 51, which can simultaneously engage with the seat locking grooves 54 on both the seat joint seat 52 and the seat support 51. A seat locking elastic member 56 is provided between the seat joint seat 52 and the seat joint seat 52 for elastically pressing the seat locking gear 55 so that the seat locking gear 55 simultaneously engages with the seat locking tooth groove 54 on the seat joint seat 52 and the seat support seat 51; the seat locking gear 55 is configured to be linked by the backrest joint seat 53 when the angle between the backrest 22 and the seat part 21 gradually decreases so that the seat locking gear 55 disengages from the seat locking tooth groove 54 on the seat support seat 51; the seat locking gear 55 is provided with a gear unlocking protrusion 551, and the inner wall of the backrest joint seat 53 is provided with a protrusion unlocking inclined wall 531 for abutting and cooperating with the gear unlocking protrusion 551 when the angle between the backrest 22 and the seat part 21 gradually decreases so as to drive the seat locking gear 55 to slide axially, thereby disengaging the seat locking gear 55 from the seat locking tooth groove 54 on the seat support seat 51. When the seat frame joint assembly 4 is released, the backrest 22 is rotated toward the seat 21. During the rotation of the backrest 22, the protrusion unlocking inclined wall 531 and the gear unlocking protrusion 551 abut against each other to drive the seat locking gear 55 to slide axially, thereby disengaging the seat locking gear 55 from the seat locking groove 54 of the seat support 51. At this moment, the seat 21 rotates relative to the seat support 51 under the action of the backrest 22, that is, the entire seat frame 2 rotates toward the front leg 11 side and then flips toward the rear leg 12 side.

[0072] like Figures 1-3 As shown in Figures 16 and 17, for ease of unlocking, the seat frame 2 also includes an armrest 23 rotatably mounted on the seat portion 21 and located in front of the backrest 22. An armrest locking mechanism 24 is provided between the armrest 23 and the seat portion 21 to lock the armrest 23 relative to the seat portion 21. The armrest locking mechanism 24 is configured to be released by the backrest 22 when the angle between the backrest 22 and the seat portion 21 gradually decreases.

[0073] like Figures 1-3As shown in Figures 16 and 17, the armrest locking mechanism 24 includes an armrest joint seat 241 rotatably connected to the seat portion 21. The armrest joint seat 241 has an armrest locking groove 242, and the seat portion 21 has an armrest locking block 243. The center of the armrest locking block 243 is rotatably connected to the seat portion 21, and the locking end of the armrest locking block 243 can be inserted into the armrest locking groove 242 to lock the armrest joint seat 241 relative to the seat portion 21. The locking end of the armrest locking block 243 is positioned between the locking end and the seat portion 21. The armrest is provided with an elastic member 244 for elastically inserting the locking end of the armrest locking block 243 into the armrest locking groove 242; the backrest 22 is provided with an armrest unlocking block 245 for pressing the operating end of the armrest locking block 243 so that the locking end of the armrest locking block 243 disengages from the armrest locking groove 242 when the angle between the backrest 22 and the seat part 21 gradually decreases; and an armrest reset elastic member 246 is provided between the armrest joint seat 241 and the seat part 21 for elastically rotating and resetting the armrest joint seat 241 relative to the seat part 21. When the seat frame joint assembly 4 is released, the backrest 22 is rotated toward the seat 21. During the rotation of the backrest 22, the armrest unlocking block 245 presses against the operating end of the armrest locking block 243 and rotates downward relative to the seat 21, causing the locking end of the armrest locking block 243 to rotate upward relative to the seat 21 and disengage from the armrest locking groove 242. At this moment, the armrest 23 rotates toward the seat 21 under the action of the armrest reset elastic member 246.

[0074] Working principle:

[0075] like Figures 1-17 As shown, the seat 2 is connected to the frame 1 facing forward.

[0076] The backrest unlocking handle 44 rotates relative to the backrest 22. The backrest unlocking handle 44 pulls the backrest locking latch 42 via the backrest unlocking cable 43 to slide the backrest locking tongue 42 upward relative to the backrest joint seat 53 of the backrest 22 and disengage it from the backrest locking notch 41. Then, the backrest 22 rotates towards the seat 21.

[0077] During the rotation of the backrest 22, the armrest unlocking block 245 presses the operating end of the armrest locking block 243 to rotate downward relative to the seat 21, causing the locking end of the armrest locking block 243 to rotate upward relative to the seat 21 and disengage from the armrest locking groove 242. Then, under the action of the armrest reset elastic member 246, the armrest 23 rotates towards the seat 21.

[0078] During the rotation of the backrest part 22, the convex block unlocking inclined wall 531 and the gear unlocking convex block 551 abut to drive the seat locking gear 55 to slide along the axial direction, so that the seat locking gear 55 is separated from the seat locking tooth groove 54 of the seat support base 51, then the seat part 21 is rotated to the front foot rod 11 side under the action of the backrest part 22, and then the whole folded seat frame 2 is turned to the rear foot rod 12 side to enter between the two rear foot rods 12, at this moment, the gravity center of the child bicycle is moved to the rear foot rod side;

[0079] During the whole turning of the seat frame 2 to the rear foot rod 12 side, the bicycle frame joint unlocking block 530 of the backrest joint base 53 presses the bicycle frame locking block 352 to slide downward relative to the front joint base 31, so that the locking horizontal shaft 3521 of the locking end of the bicycle frame locking block 352 is separated from the bicycle frame locking gap 351, then the front foot rod 11 is rotated to the rear foot rod 12 side under the action of the front reset elastic member 311, the push rod 13 is rotated to the rear foot rod 12 side under the action of the push reset elastic member 331, so that the whole folding work of the child bicycle is completed, therefore, the automatic linkage unlocking can be realized, and the whole volume of the folded child bicycle is relatively small.

Claims

1. A foldable stroller, characterized in that... The utility model relates to a folding bicycle, comprising: a frame (1) comprising a front leg rod (11), a rear leg rod (12) and a push rod (13) connected by a frame joint assembly (3) to make the frame (1) foldable, the lower end of the front leg rod (11) being connected with a front wheel set, the lower end of the rear leg rod (12) being connected with a rear wheel set, the upper end of the push rod (13) being connected with a handlebar rod (14); a seat frame (2) detachably connected with the frame (1) forwardly or rearwardly, the seat frame (2) comprising a seat part (21) and a backrest part (22) connected by a seat frame joint assembly (4) to make the seat frame (2) foldable; a seat frame locking control assembly (5) provided between the seat frame (2) and the frame (1); when the seat frame (2) is connected with the frame (1) forwardly, the backrest part (22) is folded to a preset angle in the direction of the seat part (21) after the seat frame joint assembly (4) is unlocked, thereby unlocking the seat frame locking control assembly (5), so that the seat frame (2) is folded toward the front leg rod (11) as a whole, and the seat frame (2) is flipped to a preset angle toward the rear leg rod (12) as a whole, thereby unlocking the frame joint assembly (3), and further folding the frame (1); when the seat frame (2) is connected with the frame (1) rearwardly, the backrest part (22) is folded to a preset angle in the direction of the seat part (21) after the seat frame joint assembly (4) is unlocked, thereby unlocking the seat frame locking control assembly (5), so that the seat frame (2) is folded toward the rear leg rod (12) as a whole, and the seat frame (2) is flipped to a preset angle toward the rear leg rod (12) as a whole, thereby unlocking the frame joint assembly (3), and further folding the frame (1); the frame joint assembly (3) comprises a rear joint seat (32) provided at the upper end of the rear leg rod (12), a front joint seat (31) provided at the upper end of the front leg rod (11) and rotatably connected with the rear joint seat (32), and a push joint seat (33) provided at the lower end of the push rod (13) and rotatably connected with the rear joint seat (32), and a same-motion member (34) provided between the push joint seat (33) and the front joint seat (31) for simultaneously rotating the push joint seat (33) and the front joint seat (31) toward each other or away from each other; the frame joint assembly (3) further comprises a frame locking mechanism (35) for locking the front joint seat (31) and / or the push joint seat (33) relative to the rear joint seat (32), the frame locking mechanism (35) being configured to be unlocked by the seat frame (2). The frame locking mechanism (35) comprises a frame locking notch (351) arranged on the front joint base (31) and / or the push joint base (33) and a frame locking block (352) slidably arranged on the rear joint base (32) and capable of being clamped into the frame locking notch (351) to lock the front joint base (31) and the push joint base (33) relative to the rear joint base (32) in the unfolded state, and a frame elastic member (353) is arranged between the frame locking block (352) and the rear joint base (32) to enable the frame locking block (352) to be elastically clamped into the frame locking notch (351); an operating end of the frame locking block (352) is exposed outside the rear joint base (32), and the operating end of the frame locking block (352) is configured to be linked with the seat frame (2) to release the lock of the frame locking mechanism (35); in order to ensure that the operating end of the frame locking block (352) can be linked and released by the frame joint unlocking block (530) of the backrest joint base (53) when the seat frame is connected to the frame to be folded forward or backward, the operating end of the frame locking block (352) and the frame joint unlocking block (530) are respectively provided with inclined walls / surfaces matched with each other, and the frame joint unlocking block (530) can press the frame locking block (352) to enable it to slide downward relative to the front joint base (31). The seat frame (2) further comprises an armrest part (23) rotatably arranged on the seat part (21) and at the front side of the backrest part (22), and a armrest locking mechanism (24) is arranged between the armrest part (23) and the seat part (21) to lock the armrest part (23) relative to the seat part (21), and the armrest locking mechanism (24) is configured to be released by the backrest part (22) when the angle between the backrest part (22) and the seat part (21) gradually decreases.

2. The stroller of claim 1, wherein The frame joint assembly (3) is configured to be released by the backrest part (22).

3. The stroller of claim 1, wherein When the frame (1) is completely folded and in a standing state, the front wheel set, the rear wheel set and the handlebar end simultaneously abut on the same plane.

4. The stroller of claim 1, wherein The front joint base (31) and the rear joint base (32) are hinged at point A, the push joint base (33) and the rear joint base (32) are hinged at point B, the front end of the same motion member (34) is eccentrically hinged with the front joint base (31) at point C, the rear end of the same motion member (34) is eccentrically hinged with the push joint base (33) at point D, and the line connecting points C and D has an included angle with the line connecting points A and B.

5. The stroller of any one of claims 1-4, wherein The push rod (13) upper part is further independently provided with a frame unlocking mechanism (36) for unlocking the frame joint assembly (3), the frame unlocking mechanism (36) comprises a frame unlocking block (361), a frame unlocking pull rope (362) and a frame operating member (363), the middle part of the frame unlocking block (361) is rotatably connected with the push joint seat (33), the unlocking end of the frame unlocking block (361) is used for linking the frame joint assembly (3) to release the lock, the connecting end of the frame unlocking block (361) is connected with the frame operating member (363) through the frame unlocking pull rope (362), and the frame operating member (363) is movably arranged on the upper part of the push rod (13).

6. The stroller of claim 5, wherein An operating member safety locking mechanism (37) is arranged between the frame operating member (363) and the push rod (13), the operating member safety locking mechanism (37) comprises an operating member locking hole (371) arranged on the upper part of the push rod (13) and an operating member lock block (372) rotatably connected with the frame operating member (363), the operating member lock block (372) has a locking end and an operating end, the locking end of the operating member lock block (372) can be inserted into the operating member locking hole (371) to lock the frame operating member (363) relative to the push rod (13), and a lock block elastic member (373) is arranged between the operating end of the operating member lock block (372) and the frame operating member (363) and can keep the locking end of the operating member lock block (372) elastically inserted into the operating member locking hole (371).

7. The stowable child's vehicle of claim 1 wherein The seat frame joint assembly (4) comprises a seat joint seat (52) arranged on the seat part (21), a plurality of backrest locking notches (41) are arranged on the seat joint seat (52) at intervals in a circumferential direction, and a backrest locking catch (42) for being inserted into the backrest locking notches (41) is slidably arranged on the backrest part (22), and a backrest locking elastic member is arranged between the backrest locking catch (42) and the backrest part (22) and can keep the backrest locking catch (42) elastically inserted into the backrest locking notches (41).

8. The stowable child's vehicle of claim 1 wherein The seat frame locking control assembly (5) comprises a seat support seat (51) detachably arranged on the frame joint assembly (3), a seat joint seat (52) rotatably connected with the seat support seat (51) and arranged on the seat part (21), and a backrest joint seat (53) rotatably connected with the seat joint seat (52) and arranged on the backrest part (22), and the backrest joint seat (53) is located between the seat support seat (51) and the seat joint seat (52). The seat frame locking control assembly (5) further comprises seat locking tooth grooves (54) respectively arranged on opposite sides of the seat joint seat (52) and the seat support seat (51), a seat locking gear (55) capable of being simultaneously clamped into the seat locking tooth grooves (54) of the seat joint seat (52) and the seat support seat (51) is arranged between the seat joint seat (52) and the seat support seat (51), and a seat locking elastic member (56) for elastically pressing the seat locking gear (55) to enable the seat locking gear (55) to be simultaneously clamped into the seat locking tooth grooves (54) of the seat joint seat (52) and the seat support seat (51) is arranged between the seat locking gear (55) and the seat joint seat (52); the seat locking gear (55) is linked by the back joint seat (53) when the angle between the back part (22) and the seat part (21) gradually decreases, so that the seat locking gear (55) is disengaged from the seat locking tooth groove (54) of the seat support seat (51).

9. The stowable child's vehicle of claim 8, wherein The seat locking gear (55) is provided with a gear unlocking protrusion (551), and the inner wall of the back joint seat (53) is provided with a protrusion unlocking inclined wall (531) for abutting and cooperating with the gear unlocking protrusion (551) when the angle between the back part (22) and the seat part (21) gradually decreases, so as to drive the seat locking gear (55) to slide in the axial direction, and enable the seat locking gear (55) to be disengaged from the seat locking tooth groove (54) of the seat support seat (51).

10. The stowable child's vehicle of claim 1 wherein The armrest locking mechanism (24) comprises an armrest joint seat (241) rotatably connected with the seat part (21), the armrest joint seat (241) is provided with an armrest locking groove (242), the seat part (21) is provided with an armrest locking block (243), the middle part of the armrest locking block (243) is rotatably connected with the seat part (21), the locking end of the armrest locking block (243) can be inserted into the armrest locking groove (242) to lock the armrest joint seat (241) relative to the seat part (21), and an armrest elastic member (244) for elastically inserting the locking end of the armrest locking block (243) into the armrest locking groove (242) is arranged between the locking end of the armrest locking block (243) and the seat part (21); the back part (22) is provided with an armrest unlocking block (245) for pressing the operation end of the armrest locking block (243) when the angle between the back part (22) and the seat part (21) gradually decreases, so that the locking end of the armrest locking block (243) is disengaged from the armrest locking groove (242).

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