Foldable baby stroller

Abstract

The utility model discloses a foldable baby stroller which comprises a front support, a seat and armrests. The seat comprises a seat plate and a backrest, the seat plate is pivoted with the front bracket, and the lower side of the backrest is pivoted with the front bracket or / and the seat plate; the rear side of the armrest is pivoted with the front bracket or / and the seat plate, and an armrest locking mechanism for limiting relative rotation of the armrest is arranged between the rear side of the armrest and the front bracket or / and the seat plate; the backrest and the armrest locking mechanism are arranged in a matched mode, and the backrest and the armrest locking mechanism are arranged in the mode that the backrest can unlock the armrest locking mechanism in a linkage mode in the folding process. By means of the arrangement, folding rotation of the backrest and unlocking of the armrests can be completed through one operation action, the armrest locking mechanism does not need to be unlocked through additional independent operation, and therefore folding operation of the baby stroller is simpler and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of infant and toddler products, and in particular to a foldable baby stroller. Background Technology

[0002] In modern society, strollers are widely used by families with children. The child sits inside the stroller while the parent pushes it, reducing the strain on the parents from carrying the child. For added convenience, strollers are generally designed to be foldable, allowing them to switch between an unfolded and folded state. When not in use, the stroller can be folded up to reduce its size, taking up less space and making it easier to store, carry, and transport.

[0003] Different strollers have different structures, so their folding operations also differ. Some strollers have very complicated folding operations, which can be inconvenient for users. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a foldable baby stroller that is easy to fold.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A foldable baby stroller includes:

[0007] Front bracket;

[0008] A seat, comprising a seat plate and a backrest, the seat plate being pivotally connected to a front support, and the lower side of the backrest being pivotally connected to the front support and / or the seat plate;

[0009] The armrest is pivotally connected to the front support and / or the seat plate at its rear, and an armrest locking mechanism is provided between the rear of the armrest and the front support and / or the seat plate to limit the relative rotation of the armrest.

[0010] The backrest and armrest locking mechanisms are configured to work together, and the two are configured such that the backrest can unlock the armrest locking mechanism during folding and rotation.

[0011] A seat locking mechanism is provided between the seat plate and the front support to limit their relative rotation. A linkage unlocking device is also provided between the seat locking mechanism and the armrest locking mechanism. The seat locking mechanism, armrest locking mechanism and linkage unlocking device are configured such that when the armrest locking mechanism is unlocked, the linkage unlocking device is activated to unlock the seat locking mechanism.

[0012] A front support pivot seat is provided on the upper side of the front support. The front support pivot seat includes a second body and a receiving portion extending from the second body toward the seat. An annular armrest pivot seat is provided on the rear side of the armrest, and the armrest pivot seat is rotatably fitted outside the receiving portion. The armrest locking mechanism is provided between the armrest pivot seat and the front support pivot seat.

[0013] The lower back is provided with an annular back pivot seat, and at least one side of the annular back pivot seat is rotatably fitted outside the receiving part; the armrest pivot seat is located between the second body of the front support pivot seat and the back pivot seat.

[0014] The front support pivot seat has a first groove on the side facing the seat. The armrest locking mechanism includes a locking groove on the annular wall of the armrest pivot seat, a third locking member that is movably connected to the backrest pivot seat, and a fifth elastic member between the third locking member and the backrest pivot seat. The third locking member includes a main body and a locking part located at the lower end of the main body. The main body is movably located in the first groove, and the receiving part has a through hole on its lower side. Under the action of the fifth elastic member, the third locking member moves downward, and its locking part passes through the through hole and can be engaged in the locking groove of the armrest pivot seat.

[0015] The third locking member also includes a linkage part disposed at the lower end of the second body and located on the side of the locking part facing the seat plate, the linkage part also extending downward through the through hole; a driving inclined surface is provided on the annular wall of the annular back-mounted pivot seat, and a driven inclined surface that can cooperate with the driving inclined surface is provided on the linkage part; when the backrest is folded and rotated, the third locking member is driven to move upward and disengage from the locking groove through the cooperation of the driving inclined surface and the driven inclined surface, and the armrest locking mechanism is unlocked.

[0016] The linkage unlocking device includes a push block that is relatively movably disposed between the third locking member and the seat plate locking mechanism. A corresponding protrusion and a groove are provided between the push block and the main body of the third locking member. The lower side of the protrusion is set as an inclined surface, and the lower side wall corresponding to the groove is also set as an inclined surface. When the third locking member is driven to move upward, the push block is driven to move towards the seat plate and unlock the seat plate locking mechanism through the cooperation of the protrusion and the inclined surface of the groove.

[0017] The seat plate is provided with a seat plate pivot seat, which is pivotally connected to the front bracket pivot seat. The seat plate locking mechanism is disposed between the seat plate pivot seat and the front bracket pivot seat. The first groove is provided with a first tooth groove. The seat plate locking mechanism includes the first tooth groove, a second tooth groove disposed on the side of the seat plate pivot seat facing the front bracket pivot seat, a first gear that is relatively movable in the first tooth groove and the second tooth groove, and a fourth elastic member disposed between the first gear and the seat plate pivot seat. The push block is located between the first gear and the third locking member.

[0018] The seat plate pivot includes a third body and a receiving portion extending from the third body toward the front support pivot; the annular back of the pivot is rotatably fitted onto the receiving portion on one side and rotatably fitted onto the receiving portion on the other side.

[0019] A backrest locking mechanism is provided between the backrest pivot seat and the seat plate pivot seat; the backrest locking mechanism includes multiple locking pin holes provided on the outer wall of the seat plate pivot seat, a locking pin that can be moved up and down relative to the backrest, and a sixth elastic member provided between the locking pin and the backrest. Under the action of the sixth elastic member, the locking pin moves downward. When the lower end of the locking pin is engaged in any locking pin hole, the backrest locking mechanism is in a locked state; and when the locking pin is engaged in the foremost locking pin hole, the driving inclined surface and the driven inclined surface are in contact.

[0020] Because this utility model adopts the above-mentioned technical solution, it has the following beneficial effects:

[0021] When the backrest is folded and rotated, the armrest locking mechanism can be unlocked in conjunction with it, so that no additional separate operation is required to unlock the armrest locking mechanism, thus making the folding operation of the baby stroller of this utility model simpler.

[0022] When the backrest is folded and rotated, the backrest locking mechanism can also be activated; thus, the folding operation of the baby stroller of this utility model is made even simpler.

[0023] When the baby stroller of this utility model is folded, its backrest, seat, armrests, push handle, front frame and bottom frame are in a relatively close state, making the overall baby stroller relatively flat after folding, thus making it small in size and easy to store, move and carry. Attached Figure Description

[0024] Figure 1 This is a plan view of the baby stroller of this utility model in its unfolded state;

[0025] Figure 2 This is a three-dimensional schematic diagram of the baby stroller of this utility model in its unfolded state;

[0026] Figure 3This is a scaled-down diagram of the baby stroller of this utility model after an explosion;

[0027] Figure 4 This is an enlarged schematic diagram of the front support of the baby stroller of this utility model;

[0028] Figure 5 This is an exploded enlarged schematic diagram of the front support of the baby stroller of this utility model;

[0029] Figure 6 According to Figure 2 An enlarged schematic diagram of part A in the middle;

[0030] Figure 7 According to Figure 3 Enlarged schematic diagram of part B in the middle;

[0031] Figure 8 According to Figure 6 A magnified diagram of the explosion;

[0032] Figure 9 According to Figure 6 A magnified diagram of the explosion from another angle;

[0033] Figure 10 This is an explosion diagram of the backrest of the baby stroller of this utility model;

[0034] Figure 11 This is an enlarged schematic diagram of the baby stroller handle of this utility model;

[0035] Figure 12 According to Figure 11 An enlarged schematic diagram of section C;

[0036] Figure 13 According to Figure 12 A magnified diagram of the explosion;

[0037] Figure 14 According to Figure 12 A magnified diagram of the explosion from another angle;

[0038] Figure 15 This is a plan view of the baby stroller during the folding process of this utility model. Figure 1 ;

[0039] Figure 16 This is a plan view of the baby stroller during the folding process of this utility model. Figure 2 ;

[0040] Figure 17 This is a plan view of the baby stroller during the folding process of this utility model. Figure 3 ;

[0041] Figure 18 This is a plan view of the baby stroller of this utility model in a folded state;

[0042] Figure 19 This is a three-dimensional schematic diagram of the baby stroller of this utility model in a folded state. Detailed Implementation

[0043] like Figures 1 to 19 As shown, this utility model discloses a foldable baby stroller, which includes:

[0044] Base bracket 1,

[0045] The front bracket 2 is rotatably connected to the bottom bracket 1 on its lower side;

[0046] Seat 4, which includes a seat 41 and a backrest 42, wherein the seat 41 is pivotally connected to the upper side of the front support 2, and the lower side of the backrest 42 is pivotally connected to the front support 2 and / or the seat 41.

[0047] The armrest 5 is pivotally connected to the front support 2 and / or the seat plate at its rear side, and an armrest locking mechanism for limiting the relative rotation of the armrest 5 is provided between the rear side of the armrest 5 and the front support 2 and / or the seat plate.

[0048] The backrest 42 is configured to work in conjunction with the armrest locking mechanism, and the two are configured such that the backrest 42 can unlock the armrest locking mechanism during the folding and rotation process.

[0049] This utility model of baby stroller also includes:

[0050] Slider 3 is slidably connected to the front bracket 2;

[0051] The strut assembly 30 is rotatably connected to the slider 3 on the upper side and rotatably connected to the bottom support 1 on the lower side. The connection position between the bottom support 1 and the front support 2 is located at the connection position between the strut assembly and the front support 2.

[0052] A slider locking mechanism is provided between the slider 3 and the front bracket 2 to restrict their relative sliding. The front bracket 2 is provided with a slider unlocking mechanism for unlocking the slider locking mechanism. The front bracket 2 is also provided with a second locking mechanism that cooperates with the slider unlocking mechanism and can restrict the slider unlocking mechanism. The cooperation between the slider unlocking mechanism and the second locking mechanism is configured such that the second locking mechanism must be unlocked to release the restriction on the slider unlocking mechanism before the slider unlocking mechanism can unlock the slider locking mechanism.

[0053] The front support 2 includes a first body 21 and a cover 22 connected front to back, and a receiving space is formed between the first body 21 and the cover 22. The cover 22 is provided with an elongated hole 221 extending vertically. One side of the slider 3 is located in the receiving space, and the other side extends out of the elongated hole 221 and is connected to the support rod assembly 30.

[0054] like Figure 4 , 5 As shown, a slider locking mechanism is provided between the slider 3 and the front support 2 to restrict their relative sliding. In this embodiment, the slider locking mechanism includes a first locking member 31 connected to the slider 3 and movable back and forth between the first body 21 and the slider 3, and a first elastic member 32 disposed between the first locking member 31 and the slider 3; the first body 21 is also recessed with an accommodating groove 211 communicating with the accommodating space. Under the action of the first elastic member 32, the front side of the first locking member 31 extends into the accommodating groove 211, and when the upper end of the first locking member 31 abuts against the top wall of the accommodating groove 211, the first locking member 31 cannot move upward, and thus the slider 3 connected to the first locking member 31 cannot move upward either. The slider locking mechanism is in a locked state, and the upper end of the support rod assembly 30 cannot move upward along the front support 2.

[0055] In this embodiment, the slider 3 has a receiving groove (not shown) on the side facing the first locking member 31. One side of the first locking member 31 extends into the receiving groove, thereby connecting the first locking member 31 and the slider 3. The first elastic member 32 is a compression spring, which is located in the receiving groove, and its two ends abut against the first locking member 31 and the bottom wall of the receiving groove, respectively.

[0056] Preferably, when the slider locking mechanism is in the locked state, the lower end of the slider 3 abuts against the bottom wall of the elongated hole 221, meaning the slider 3 cannot move downwards. This makes the stroller more stable and safer to use when unfolded.

[0057] The slider unlocking mechanism includes a first drive member 35 that is movably connected to the front bracket 2 and a linkage group connected to the first drive member 35. The linkage group is configured to cooperate with the slider locking mechanism, that is, the linkage group is configured to cooperate with the first locking member 31. When the first drive member 35 is moved upward, the linkage group is driven to unlock the slider locking mechanism.

[0058] In this embodiment, the linkage assembly includes a first unlocking member 33 movably connected to the front bracket 2, a second elastic member 34 disposed between the first unlocking member 33 and the front bracket 2, and a first traction cable 36 connected to the first driving member 35 on its upper side. The lower end of the first traction cable 36 is connected to the first unlocking member 33, and the first unlocking member 33 is configured to cooperate with the slider locking mechanism. When the first driving member 35 is moved upward, the first unlocking member 33 can be pulled upward by the first traction cable 36 to unlock the slider locking mechanism.

[0059] The first unlocking member 33 is configured to cooperate with the first locking member 31. Specifically, the front side of the first unlocking member 33 is located in the receiving slot 211, and the rear side is located in the receiving space. The first unlocking member 33 is located below the front side of the first locking member 31. Under the action of the second elastic member 34, the first unlocking member 33 maintains a downward moving trend, so that when the stroller is in the unfolded state, the first unlocking member 33 will not automatically push the first locking member 31. When the first unlocking member 33 is driven to move upward, it can drive the first locking member 31 to move towards the slider 3 and disengage from the receiving slot 211, thereby unlocking the slider locking mechanism. The first locking member 31 and the slider 3 can move upward together relative to the front support 2.

[0060] In this embodiment, the first unlocking member 33 has a first inclined surface 331 on its upper side and / or the first locking member 31 has a second inclined surface 311 on its lower front side. Preferably, the first unlocking member 33 and the first locking member 31 have corresponding first and second inclined surfaces 311 on their upper and lower front sides, respectively. Thus, when the first unlocking member 33 moves upward, the first locking member 31 is driven to move towards the slider 3 through the cooperation of the first and second inclined surfaces 331 and 311. When only the first unlocking member 33 has a first inclined surface 331 on its upper side or only the first locking member 31 has a second inclined surface 311 on its lower front side, when the first unlocking member 33 moves upward, the first locking member 31 can also be driven to move towards the slider 3 through the action of the individual inclined surfaces.

[0061] In this embodiment, the dual-locking mechanism includes a second locking member 37 that is movably connected between the first body 21 and the cover 22, and a third elastic member 38 disposed between the second locking member 37 and the first body 21. When the stroller is in the unfolded state, under the action of the third elastic member 38, the first locking member 31 moves backward and blocks the upper side of the first driving member 35, and the first driving member 35 cannot move upward.

[0062] The dual-locking mechanism also includes a second unlocking member 39 that is movably connected to the front bracket 2. The lower side of the second unlocking member 39 extends into the receiving space and cooperates with the second locking member 37, while the upper side extends upward outside the front bracket 2 for easy pressing. Driving the second unlocking member 39 downward, i.e., pressing the second unlocking member 39 downward, can drive the second locking member 37 forward without obstructing the upward movement of the first driving member 35. The first driving member 35 can then move upward, thereby unlocking the slider locking mechanism.

[0063] The second unlocking member 39 is located on the upper rear side of the second locking member 37, and the lower front side of the second unlocking member 39 is provided with a third inclined surface 391 or / and the rear side of the second locking member 37 is provided with a fourth inclined surface 371. In this embodiment, preferably, the lower front side of the second unlocking member 39 and the upper rear side of the second locking member 37 are respectively provided with cooperating third inclined surfaces 391 and fourth inclined surfaces 371. When the second unlocking member 39 is pressed down, the second locking member 37 moves toward the first body 21 through the cooperation of the third inclined surfaces 391 and fourth inclined surfaces 371. Similarly, it is also possible that only the lower front side of the second unlocking member 39 is provided with a third inclined surface 391 or only the upper rear side of the second locking member 37 is provided with a fourth inclined surface 371. When the second unlocking member 39 is pressed down, the first locking member 31 can also be driven to move toward the slider 3 by the action of the individual inclined surfaces.

[0064] The first body 21 is also provided with a mounting groove 212 that communicates with the front and rear of the accommodating space. The front of the second locking member 37 extends into the mounting groove 212. The third elastic member 38 is a compression spring, which is also located in the mounting groove 212. When the second locking member 37 moves forward, it also moves into the mounting groove 212.

[0065] The first driving member 35 has a vertically extending clearance groove 353 on its front side, opening towards the first body 21. When the stroller is in the unfolded state, the second locking member 37 spans over the clearance groove 353 from front to back, and the rear side of the second locking member 37 is above the portion of the first driving member 35 not having the clearance groove 353, thus preventing the first driving member 35 from moving upward. When the second unlocking member 39 moves downward, the second locking member 37 is driven forward, and its rear side is also above the clearance groove 353. Thus, the second locking member 37 no longer obstructs the upward movement of the first driving member 35. When the first driving member 35 moves upward, the front side of the second locking member 37 is within the mounting groove 212 of the first body 21, and the rear side is within the clearance groove 353.

[0066] In this embodiment, the cover 22 is provided with a through drive hole 222; the front side of the first drive member 35 is movably positioned between the first body 21 and the cover 22, i.e., within the receiving space; the rear side extends out of the drive hole 222 and can move up and down along the drive hole 222, thereby facilitating upward movement of the first drive member 35. Specifically, the first drive member 35 includes an action part 351 and an operation part 352 extending rearward from the rear side of the action part 351. The action part 351 is movably positioned between the first body 21 and the cover 22, i.e., within the receiving space; the rear side of the operation part 352 extends out of the rear side of the front bracket 2 through the drive hole 222 and can move up and down along the drive hole 222, thereby facilitating upward movement of the first drive member 35.

[0067] In this embodiment, the cover 22 is provided with a driving hole 222 that runs through the front and back; the front side of the first driving member 35 is located between the first body 21 and the cover 22, i.e., within the accommodating space, and the rear side extends out of the rear side of the driving hole 222 and can move up and down along the driving hole 222, thereby facilitating the movement and operation of the first driving member 35.

[0068] Specifically, the first driving member 35 includes an action part 351 and an operation part 352 extending rearward from the rear side of the action part 351. The action part 351 is located between the first body 21 and the cover 22, i.e., within the receiving space, and can be moved up and down relative to each other. The operation part 352 extends out of the rear side of the front bracket 2 through the driving hole 222 and can move up and down along the driving hole 222, thereby facilitating the operation of the first driving member 35.

[0069] The clearance groove 353 is disposed on the front side of the operating part 351. When the stroller is in the unfolded state, the second locking member 37 spans over the clearance groove 353 from front to back, and the rear side of the second locking member 37 is located above the front side of the operating part 352.

[0070] Because the second locking member 37 has a certain thickness, after the second unlocking member 39 moves downward to drive the second locking member 37 to disengage from the obstruction on the front side of the operating part 352, there is a certain gap between the lower end of the second unlocking member 39 and the upper end of the first driving member 35. Therefore, the second unlocking member 39 will not obstruct the upward movement of the first driving member 35.

[0071] As described above, when folding the baby stroller of this utility model, the two locks must be unlocked first before the slider unlocking mechanism can be activated to unlock the slider locking mechanism and fold the front base bracket 1, the front bracket 2, and the support rod assembly 30. This design can prevent accidental folding of the stroller due to misoperation of the slider unlocking device, thereby avoiding the resulting safety hazards.

[0072] Combination Figures 7 to 14 As shown, a seat locking mechanism is provided between the seat plate 41 and the front support 2 to limit their relative rotation. A linkage unlocking device is also provided between the seat locking mechanism and the armrest locking mechanism. The seat locking mechanism, armrest locking mechanism, and linkage unlocking device are configured such that when the armrest locking mechanism is unlocked, the linkage unlocking device is activated to unlock the seat locking mechanism. That is, when the backrest 42 is folded, not only can the armrest locking mechanism be unlocked, eliminating the need for a separate operation to unlock it and making the folding operation of this stroller simpler, but the seat locking mechanism can also be activated. This further simplifies the folding operation of this stroller.

[0073] The front support 2 is provided with a front support pivot seat 23 on its upper side, and the seat plate 41 is provided with a seat plate pivot seat 411. The seat plate pivot seat 411 is pivotally connected to the front support pivot seat 23, and the seat plate locking mechanism is provided between the seat plate pivot seat 411 and the front support pivot seat 23.

[0074] The armrest 5 is also pivotally connected to the front support pivot seat 23, and the armrest locking mechanism is disposed between the armrest 5 and the front support pivot seat 23. In this embodiment, the front support pivot seat 23 includes a second body 232 and a receiving portion 233 extending from the second body 232 toward the seat 4. An annular armrest pivot seat 51 is provided on the rear side of the armrest 5, and the armrest pivot seat 51 is rotatably sleeved on the receiving portion 233; the armrest locking mechanism is disposed between the armrest pivot seat 51 and the front support pivot seat 23.

[0075] A ring-shaped backrest pivot seat 43 is provided on the lower side of the backrest 42. At least one side of the backrest pivot seat 43 is rotatably fitted onto the outside of the receiving part 233, and the armrest pivot seat 51 is located between the second body 232 of the front support pivot seat and the backrest pivot seat 43.

[0076] like Figure 8 , 9As shown, the front support pivot 23 has a first groove 231 on the side facing the seat 4. The armrest locking mechanism includes a locking groove 511 on the annular wall of the armrest pivot 51, a third locking member 52 that is movably connected to the backrest pivot 43, and a fifth elastic member 53 between the third locking member 52 and the backrest pivot 43. The third locking member 52 includes a main body 521 and a locking part 522 located at the lower end of the main body 521. The main body 531 is movably located in the first groove 231. The receiving part 233 has a through hole on its lower side. Under the action of the fifth elastic member 53, the third locking member 52 moves downward, and its locking part 522 passes through the through hole and can be locked into the locking groove 511 of the armrest pivot 51. Thus, the armrest 5 and the front support 2 cannot rotate relative to each other, and the armrest locking mechanism is in a locked state.

[0077] The third locking member 52 also includes a linkage part 523 disposed at the lower end of the second body 232 and located on the side of the locking part 522 facing the seat plate 41. The linkage part 523 also extends downward through the through hole. A driving inclined surface 431 is provided on the annular backrest pivot seat 43, and a driven inclined surface 5231 that can cooperate with the driving inclined surface 431 is provided on the linkage part 523. When the backrest 42 is folded and rotated forward and downward, the third locking member 52 is driven to move upward through the cooperation of the driving inclined surface 431 and the driven inclined surface 5231. When the third locking member 52 moves upward until its locking part 522 disengages from the locking groove 511, the armrest locking mechanism unlocks.

[0078] The linkage unlocking device includes a push block 54 movably disposed between the third locking member 52 and the seat locking mechanism. A corresponding protrusion 541 and a groove 524 are provided between the push block 54 and the main body of the third locking member 52. The lower side of the protrusion 541 is configured as an inclined surface 5411, and the lower sidewall of the corresponding groove 524 is also configured as an inclined surface 5241. With this configuration, when the third locking member 52 moves upward, the push block 54 moves towards the seat 4 through the cooperation of the inclined surface 5411 of the protrusion and the inclined surface 5241 of the groove, thereby driving the seat 41 locking mechanism to unlock.

[0079] The seat plate 41 is provided with a seat plate pivot seat 411, which is pivotally connected to the front support pivot seat 23. The seat plate locking mechanism is provided between the seat plate pivot seat 411 and the front support pivot seat 23. The first groove 231 is provided with a first toothed groove 231, and the first toothed groove 231 may only be provided on the side of the receiving part 233 facing the seat 4, or the second body 232 and the receiving part 233 may together form the first toothed groove 231. The seat locking mechanism includes a first toothed groove 231 and a second toothed groove 412 respectively disposed on opposite sides of the front support pivot seat 23 and the seat pivot seat 411, a first gear 48 movably disposed in the first toothed groove 231 and the second toothed groove 412, and a fourth elastic member 49 disposed between the first gear 48 and the seat pivot seat 411. Under the action of the fourth elastic member 49, the first gear 48 simultaneously meshes with the first toothed groove 231 and the second toothed groove 412, so that the front support pivot seat 23 and the seat pivot seat 411 cannot rotate relative to each other, that is, the seat 41 and the front support 2 cannot rotate relative to each other, and the seat locking mechanism is in a locked state.

[0080] In this embodiment, the fourth elastic element 49 is configured as a compression spring, and the compression spring is disposed between the first gear 48 and the bottom wall of the second tooth groove 412.

[0081] The push block 54 is located between the first gear 48 and the third locking member 52. Thus, the third locking member 52 does not affect the movement of the first gear 48, i.e., it does not affect the locking mechanism of the seat plate 41 and its locking and unlocking. When the push block 54 moves towards the seat 4, it pushes the first gear 48 towards the second tooth groove 231. When the first gear 48 disengages from the first tooth groove 231, the locking mechanism of the seat plate 41 unlocks, and the seat plate 41 and the front support 2 can rotate relative to each other.

[0082] Preferably, the seat pivot 411 includes a third body 413 and a receiving portion 414 extending from the third body 413 toward the front support pivot 23. One side of the annular back-to-pivot pivot 43 is rotatably fitted onto the receiving portion 233, and the other side is rotatably fitted onto the receiving portion 414. With this arrangement, the back-to-pivot pivot 43 and the armrest pivot 51 are sandwiched between the third body 413 of the seat pivot and the second body 232 of the front support pivot 23, thereby making the assembly of the back-to-pivot pivot 43 and the armrest pivot 51 more convenient. Moreover, it ensures that the back-to-pivot pivot 43 and the armrest pivot 51 can only rotate and cannot move between the second body 232 and the third body 413, thus better ensuring the stability and feasibility of the armrest locking mechanism and the seat unlocking linkage.

[0083] A back-locking mechanism is provided between the back-mounted pivot 43 and the seat plate pivot 411. Figure 8 ,10 As shown, the backrest locking mechanism includes a locking pin hole 430 disposed on the outer wall of the seat plate pivot seat 411, a locking pin 44 that is movably connected to the backrest 42, and a sixth elastic member 45 disposed between the locking pin 44 and the backrest 42. Under the action of the sixth elastic member 45, the locking pin 44 moves downward. When the lower end of the locking pin 44 is engaged in the locking pin hole 430, the backrest locking mechanism is in a locked state, and the backrest 42 cannot rotate relative to the seat plate 41 and the front bracket 2.

[0084] The upper side of the locking pin 44 is movably connected to the backrest 42, and the lower side extends into the ring of the annular backrest pivot seat 43, so that it can be engaged with the locking pin hole 430 provided on the outer wall of the seat plate pivot seat 411.

[0085] In this embodiment, preferably, the outer wall of the seat pivot 411 is provided with a plurality of locking pin holes 430 circumferentially. When the lower end of the locking pin 44 is engaged in any of the locking pin holes 430, the backrest locking mechanism is in a locked state; and when the locking pin 44 is engaged in the foremost locking pin hole 430, the driving inclined surface 431 and the driven inclined surface 5231 are in contact. Thus, when the locking pin 44 is engaged in other locking pin holes 430, the driving inclined surface 431 and the driven inclined surface 5231 are not in contact, but have a certain gap. This arrangement allows the tilt angle of the backrest 42 to be adjusted when the baby stroller is in the unfolded state.

[0086] The backrest 42 is further provided with a backrest unlocking mechanism for unlocking the backrest locking mechanism. The backrest unlocking mechanism includes a second driving member 46 movably connected to the backrest 42, and a second traction cable 47 with its upper end connected to the second driving member 46. The lower end of the second traction cable 47 is connected to a locking pin 44. The second driving member 46 may be configured to be movable vertically or rotatably connected to the backrest 42. Moving the second driving member 46 upwards or rotating it in one direction can drive the upper end of the second traction cable 47 upwards, thereby pulling the locking pin 44 upwards. The driving mechanism can also be any other known and feasible structure, as long as it can achieve the above functions.

[0087] Under the action of the sixth elastic member 45, when the lower side of the locking pin 44 is aligned with a locking pin hole 430, the locking pin 44 moves downward and inserts into one of the locking pin holes 430, thereby locking the backrest 42 at the tilt angle relative to the seat plate 41. When the tilt angle of the backrest 42 needs to be adjusted, the second driving member 46 can be operated to drive the locking pin 44 upward through the second traction cable 47 to disengage from the locking pin hole 430 on the seat plate 41, thereby unlocking the backrest locking mechanism. At this time, the backrest 42 can be rotated back and forth. When the required angle is reached, the second driving member 46 is released. Under the action of the sixth elastic member 45, the locking pin 44 moves downward again and inserts into one of the locking pin holes 430 again, thereby locking the backrest 42 at the tilt angle. Because the driving inclined surface 431 and the driven inclined surface 5231 only engage when the locking pin 44 is engaged in the foremost locking pin hole 430, the driving inclined surface 431 on the backrest 42 will only cooperate with the driven inclined surface 5231 after the locking pin 44 is disengaged from the foremost locking pin hole 430 and the backrest 42 is rotated forward, thus driving the third locking member 52 to move upward. If the backrest 42 is rotated from front to back to adjust its angle, the distance between the driving inclined surface 431 and the driven inclined surface 5231 will only increase. That is to say, if only the tilt angle of the backrest 42 is adjusted forward or backward, the rotation of the backrest 42 will not drive the third locking member 52 to move upward, thus failing to unlock the armrest locking mechanism and the seat locking mechanism.

[0088] The stroller of this utility model also includes a push handle 6 rotatably connected to the bottom support 1. Specifically, the push handle 6 is rotatably connected to the side of the front support pivot 23 opposite to the backrest 42, that is, the push handle 6 is rotatably connected to the side of the second body 232 of the front support pivot opposite to the receiving part 233, and a push handle locking mechanism is provided between the push handle 6 and the front support pivot 23 to limit their relative rotation.

[0089] Combination Figures 11 to 14 As shown, the push handle locking mechanism includes a third toothed groove 234 and a fourth toothed groove 61 respectively disposed on the opposite side of the front bracket pivot seat 23 and the push handle 6, a second gear 62 movably disposed between the third toothed groove 234 and the fourth toothed groove 61, and a seventh elastic member 63 disposed between the second gear 62 and the push handle 6 or the front bracket pivot seat 23; under the action of the seventh elastic member 63, the second gear 62 simultaneously meshes with the third toothed groove 234 and the fourth toothed groove 61, so that the push handle 6 cannot rotate relative to the front bracket 2, and the push handle locking mechanism is in a locked state.

[0090] In this embodiment, the seventh elastic element 63 is configured as a compression spring and is disposed between the second gear 62 and the bottom wall of the fourth tooth groove 61.

[0091] The push handle 6 is also provided with a push handle unlocking mechanism for unlocking the push handle locking mechanism. In this embodiment, the push handle unlocking mechanism includes a third driving member 64 (as shown in 1 and 2) movably connected to the push handle 6, a third traction cable 65 connected to the third driving member 64, a turntable 66 rotatably connected to the push handle 6 and placed on the side of the second gear 62 away from the seventh elastic member 63, and a linkage structure disposed between the turntable 66 and the second gear 62; the third driving member 64 is driven to pull the turntable 66 to rotate through the third traction cable 65, and then through the cooperation of the linkage structure, the second gear 62 is driven to move into the fourth tooth groove 61 and disengage from the third tooth groove 234, thereby unlocking the push handle locking mechanism.

[0092] In this embodiment, the linkage structure includes helical teeth 661 and linkage grooves 621 respectively disposed on opposite sides of the turntable 66 and the second gear 62. That is, one of the turntable 66 and the second gear 62 is provided with helical teeth 661, and the other is provided with the linkage groove 621. The bottom wall of the linkage groove 621 is set as an inclined surface 6211, and the helical teeth 661 extend into the linkage groove 621. When the turntable 66 is pulled and rotated by the third traction cable 65, the helical teeth 661 and the bottom wall of the linkage groove 621 cooperate with each other, and the second gear 62 is driven to move into the fourth tooth groove 61. After the drive to the third driving member 64 is released, under the action of the seventh elastic member 63, the second gear 62 moves towards the third tooth groove 234.

[0093] Preferably, the second gear 62 has a recessed cavity 624 on the side facing the third tooth groove 234, and the turntable 66 is rotatably placed within the cavity 624. The helical tooth 661 and the linkage groove 621 are respectively disposed between the turntable 66 and the bottom wall of the cavity 624. In this embodiment, the helical tooth 661 protrudes from one side of the turntable 66, and the linkage groove 621 is provided on the bottom wall of the cavity 624.

[0094] A blocking member 67 is connected to the push handle 6 and is located on the side of the turntable 66 facing away from the second gear 62. When the baby stroller of this invention is in the unfolded state, under the action of the elastic member, the side of the turntable 66 facing away from the second gear 62 abuts against the blocking member 67. This arrangement ensures that the turntable 66 can only rotate between the blocking member 67 and the bottom wall of the receiving cavity 624, and cannot move in the direction away from the second gear 62, thereby ensuring the stability of the push handle unlocking mechanism's unlocking operation.

[0095] Preferably, the blocking member 67 is also located within the receiving cavity 624. This arrangement allows full utilization of the thickness of the gear itself and makes assembly more convenient.

[0096] The bottom wall of the fourth tooth groove 61 has a cylindrical boss 611 protruding towards the pivot seat 411. The cylindrical boss 611 passes through the second gear 62 and the turntable 66 in sequence and connects to the blocking member 67. Multiple positioning protrusions 612 are formed at intervals on the side of the cylindrical boss 611 away from the bottom wall of the fourth tooth groove 61. Correspondingly, the blocking member 67 has a through hole 670 at its center, and the wall of the through hole 670 is circumferentially provided with multiple positioning grooves 671 communicating with the through hole. The multiple positioning protrusions are respectively inserted into the multiple positioning grooves 671. This makes the assembly of the blocking member 67 and the push handle 6 more convenient and the connection more stable.

[0097] In this embodiment, the third driving member 64 is movably connected to the push handle 6. Moving the third driving member 64 upward will pull the upper end of the third traction cable 65 upward, thereby causing the lower side of the third traction cable 65 to pull the turntable 66 to rotate. In other embodiments, the third driving member 64 can also be set to any other known structure, as long as it can drive the third traction cable 65 to achieve the above function.

[0098] In other embodiments, the seventh elastic member 63 can also be disposed between the second gear 62 and the bottom wall of the third tooth groove 234, and correspondingly, the turntable 66 is disposed between the second gear 62 and the bottom wall of the fourth tooth groove 61. With this configuration, under the action of the elastic member, the second gear 62 moves towards the fourth gear and simultaneously engages with the third tooth groove 234 and the fourth tooth groove 61, preventing the push handle 6 from rotating relative to the front bracket 2. When the push handle locking mechanism needs to be unlocked, the third driving member 64 is driven, and the turntable 66 is pulled to rotate via the third traction cable 65. Then, through the engagement of the helical tooth 661 with the bottom wall of the groove, the second gear 62 is driven to move into the third tooth groove 234 and disengage from the fourth tooth groove 61, thus unlocking the push handle locking mechanism. In this configuration, when the push handle 6 rotates relative to the front bracket 2, the turntable 66 rotates together with the push handle 6 relative to the front bracket 2.

[0099] The base bracket 1 is connected to a front wheel 11 on the front side and a rear wheel 12 on the rear side.

[0100] In this embodiment, the base support 1 includes two bottom rods 13 on the left and right, and the support rod assembly 30 includes two support rods 301 on the left and right, with the lower sides of the two support rods 301 pivotally connected to the two bottom rods 13 respectively; the front support 2 has two sliders 3 connected to its left and right sides respectively, with the upper ends of the two support rods 301 pivotally connected to the two sliders 3 respectively. Each slider 3 is provided with a slider locking mechanism between itself and the front support 2. Preferably, the first driving member 35 is provided with only one set, and the first traction cable 36 is provided with two sets, with the upper ends of both sets of first traction cables connected to the first driving member 35, thereby unlocking the two slider locking mechanisms at once.

[0101] The strut assembly 30 also includes crossbars 302 on the left and right sides respectively connected to the upper ends of the two support rods 301, so that the two support rods 301 can move synchronously relative to the front bracket 2.

[0102] The base bracket 1 also includes a front wheel bracket 14 connected to the front side of the two base rods 13, and the front wheels 11 are respectively connected to the left and right sides of the front wheel bracket 14. In this embodiment, and in other embodiments, the two base rods 13 may be separately connected to different positions of the front wheel bracket 14.

[0103] The lower side of the front bracket 2 is pivotally connected to the front wheel bracket 14. In other embodiments, the bottom bracket 1 may also be other known and feasible structures, with the lower side of the front bracket 2 pivotally connected to other suitable positions of the bottom bracket.

[0104] Two front support pivot seats 23 are spaced apart on the upper side of the front support 2. Seat plate pivot seats 41 are provided on both sides of the seat plate 41. The two front support pivot seats 23 are pivotally connected to the seat plate pivot seats 411 on both sides of the seat 4. A seat plate 41 locking mechanism is provided between each seat plate pivot seat 411 and the front support pivot seat 23. The armrest 5 is U-shaped with a rearward opening. Armrest pivot seats 51 are provided on the rear sides of both sides. An armrest locking mechanism is provided between each armrest pivot seat 51 and the front support pivot seat 23. A linkage unlocking device is provided between each armrest locking mechanism and the seat plate 41 locking mechanism. Backrest pivot seats 43 are provided on the lower sides of the left and right sides of the backrest 42. A backrest locking mechanism is provided between each backrest pivot seat 43 and the seat plate pivot seat 411. A second drive member 46 is provided, and the upper ends of both second traction cables 47 are connected to the second drive member 46.

[0105] The push handle 6 includes two push handle rods 60 on the left and right sides. Each push handle rod 60 has a push handle locking mechanism between its lower side and the corresponding front bracket pivot seat 23. Correspondingly, the third traction cable 65 and the turntable 66 are also provided in two sets. The third driving member 64 can be provided in two sets, respectively provided on the two push handle rods 60. Alternatively, the push handle 6 can also include push rods 601 on the left and right sides respectively connected to the upper side of the two push handle rods 60. The third driving member 64 is provided in only one set and connected to the push rods 601. The upper side of both third traction cables 65 is connected to the third driving member 64.

[0106] When folding this baby stroller, move the third drive member 64 upwards, and the main turntable 66 will rotate via the third traction cable 65. The helical teeth 661 on the turntable 66 engage with the inclined surface of the linkage groove 621 on the second gear 62, driving the second gear 62 to move into the fourth tooth groove 61 below the push handle 6 until the second gear 62 completely disengages from the third tooth groove 234 on the front bracket 2, unlocking the push handle locking mechanism. At this point, rotate the push handle 6 forward and downward until it can no longer rotate (the push handle 6 can no longer rotate when it contacts the bottom bracket 1, such as...). Figure 15 (as shown)

[0107] Moving the second drive member 46 upwards causes the locking pin 44 to move upwards via the second traction cable 47, disengaging it from the locking pin hole 430 on the seat plate pivot 411, thereby unlocking the back-locking mechanism; then rotating the back-mounted locking mechanism forward and downwards (as shown in the image)... Figure 15 As shown), during the rotation of the backrest 42, the driving inclined surface 431 on its ring wall pushes the driven inclined surface 5231 on the linkage part 523 of the third locking member 52, thereby pushing the third locking member 52 to move upward; thus, the locking part 522 of the third locking member 52 will disengage from the locking groove 511 of the armrest pivot seat 51, the armrest locking mechanism is unlocked, and the armrest 5 can rotate forward and downward relative to the front support 2; at the same time, when the third locking member 52 moves upward, it passes through the inclined surface of its groove and the protrusion of the push block 54. With the inclined plane engaged, the pusher 54 is driven to move towards the seat plate pivot 411, thereby pushing the first gear 48 into the second tooth groove 412 until the first gear 48 is completely disengaged from the first tooth groove 231, the seat plate locking mechanism unlocks, and the seat plate 41 can rotate relative to the front support 2; continuing to rotate the backrest 42 forward and downward, when the backrest 42 contacts the armrest 5 and the seat plate 41, it will drive the armrest 5 and the seat plate 41 to rotate forward and downward together until they can no longer rotate (e.g. Figure 17 (as shown)

[0108] Press down on the second unlocking member 39. Through the cooperation of the second unlocking member 39 and the third inclined surface 391 and the fourth inclined surface 371 on the second locking member 37, the second locking member 37 is pushed towards the first body 21 and no longer obstructs the upward movement of the first driving member 35. At this time, the first driving member 35 can be pulled upward. The first unlocking member 33 is pulled upward by the first traction cable 36. Through the cooperation of the first inclined surface 331 and the second inclined surface 311 on the first unlocking member 33 and the first locking member 31, the first locking member 31 moves towards the slider 3 and disengages from the receiving long slot 211. The slider locking mechanism is unlocked, and the slider 3 can move relative to the front bracket 2 with the first locking member 31.

[0109] Rotating the front support 2 backward and downward causes the slider 3 to move backward along the front support 2, thereby moving the upper side of the support assembly backward as well. Simultaneously, the lower side of the support assembly rotates relative to the bottom support 1 until the bottom support 1 can no longer rotate backward and downward. The baby push-out device of this invention is in a folded state (e.g., Figure 18 As shown in Figure 19, in the folded state, the push handle 6, backrest 42, seat 41, armrest 5, front support 2 and bottom support 1 are relatively close together, making the folded stroller relatively flat, thus small in size and easy to store, move and carry.

[0110] To unfold the folded stroller, simply rotate each component in the opposite direction.

[0111] The above definitions of up, down, front, back, left, and right directions are based on normal usage conditions. That is, the direction where the front wheel 11 is located is front, the direction where the rear wheel 12 is located is back, the direction where the push handle 6 is located is up, the direction where the front wheel 11 and the rear wheel 12 are located is down, and the direction where the two front bracket pivot seats are located is left and right.

[0112] Those skilled in the art should understand that the terms "upper," "lower," "left," "right," "front," "back," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. When the visual observation changes, the above orientation or positional relationship will also change accordingly, and therefore should not be construed as a limitation of the present invention.

[0113] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A foldable baby stroller, characterized in that: include: Front bracket; A seat, comprising a seat plate and a backrest, the seat plate being pivotally connected to a front support, and the lower side of the backrest being pivotally connected to the front support and / or the seat plate; The armrest is pivotally connected to the front support and / or the seat plate at its rear, and an armrest locking mechanism is provided between the rear of the armrest and the front support and / or the seat plate to limit the relative rotation of the armrest. The backrest and armrest locking mechanisms are configured to work together, and the two are configured such that the backrest can unlock the armrest locking mechanism during folding and rotation.

2. The foldable baby stroller according to claim 1, characterized in that: A seat locking mechanism is provided between the seat plate and the front support to limit their relative rotation. A linkage unlocking device is also provided between the seat locking mechanism and the armrest locking mechanism. The seat locking mechanism, armrest locking mechanism and linkage unlocking device are configured such that when the armrest locking mechanism is unlocked, the linkage unlocking device is activated to unlock the seat locking mechanism.

3. The foldable baby stroller according to claim 2, characterized in that: A front support pivot seat is provided on the upper side of the front support. The front support pivot seat includes a second body and a receiving portion extending from the second body toward the seat. An annular armrest pivot seat is provided on the rear side of the armrest, and the armrest pivot seat is rotatably fitted outside the receiving portion. The armrest locking mechanism is provided between the armrest pivot seat and the front support pivot seat.

4. The foldable baby stroller according to claim 3, characterized in that: The lower back is provided with an annular back pivot seat, and at least one side of the annular back pivot seat is rotatably fitted outside the receiving part; the armrest pivot seat is located between the second body of the front support pivot seat and the back pivot seat.

5. The foldable baby stroller according to claim 4, characterized in that: The front support pivot seat has a first groove on the side facing the seat. The armrest locking mechanism includes a locking groove on the annular wall of the armrest pivot seat, a third locking member that is movably connected to the backrest pivot seat, and a fifth elastic member between the third locking member and the backrest pivot seat. The third locking member includes a main body and a locking part located at the lower end of the main body. The main body is movably located in the first groove, and the receiving part has a through hole on its lower side. Under the action of the fifth elastic member, the third locking member moves downward, and its locking part passes through the through hole and can be engaged in the locking groove of the armrest pivot seat.

6. The foldable baby stroller according to claim 5, characterized in that: The third locking member also includes a linkage part disposed at the lower end of the second body and located on the side of the locking part facing the seat plate, the linkage part also extending downward through the through hole; a driving inclined surface is provided on the annular wall of the annular back-mounted pivot seat, and a driven inclined surface that can cooperate with the driving inclined surface is provided on the linkage part; when the backrest is folded and rotated, the third locking member is driven to move upward and disengage from the locking groove through the cooperation of the driving inclined surface and the driven inclined surface, and the armrest locking mechanism is unlocked.

7. The foldable baby stroller according to claim 5, characterized in that: The linkage unlocking device includes a push block that is relatively movably disposed between the third locking member and the seat plate locking mechanism. A corresponding protrusion and a groove are provided between the push block and the main body of the third locking member. The lower side of the protrusion is set as an inclined surface, and the lower side wall corresponding to the groove is also set as an inclined surface. When the third locking member is driven to move upward, the push block is driven to move towards the seat plate and unlock the seat plate locking mechanism through the cooperation of the protrusion and the inclined surface of the groove.

8. The foldable baby stroller according to claim 7, characterized in that: The seat plate is provided with a seat plate pivot seat, which is pivotally connected to the front bracket pivot seat. The seat plate locking mechanism is disposed between the seat plate pivot seat and the front bracket pivot seat. The first groove is provided with a first tooth groove. The seat plate locking mechanism includes the first tooth groove, a second tooth groove disposed on the side of the seat plate pivot seat facing the front bracket pivot seat, a first gear that is relatively movable in the first tooth groove and the second tooth groove, and a fourth elastic member disposed between the first gear and the seat plate pivot seat. The push block is located between the first gear and the third locking member.

9. The foldable baby stroller according to claim 8, characterized in that: The seat plate pivot includes a third body and a receiving portion extending from the third body toward the front support pivot; the annular back of the pivot is rotatably fitted onto the receiving portion on one side and rotatably fitted onto the receiving portion on the other side.

10. The foldable baby stroller according to claim 6, characterized in that: The linkage unlocking device includes a push block that is relatively movably disposed between the third locking member and the seat plate locking mechanism. A corresponding protrusion and a groove are provided between the push block and the main body of the third locking member. The lower side of the protrusion is set as an inclined surface, and the lower side wall corresponding to the groove is also set as an inclined surface. When the third locking member is driven to move upward, the push block is driven to move towards the seat plate and unlock the seat plate locking mechanism through the cooperation of the protrusion and the inclined surface of the groove.

11. The foldable baby stroller according to claim 10, characterized in that: The seat plate is provided with a seat plate pivot seat, which is pivotally connected to the front bracket pivot seat. The seat plate locking mechanism is disposed between the seat plate pivot seat and the front bracket pivot seat. The first groove is provided with a first tooth groove. The seat plate locking mechanism includes the first tooth groove, a second tooth groove disposed on the side of the seat plate pivot seat facing the front bracket pivot seat, a first gear that is relatively movable in the first tooth groove and the second tooth groove, and a fourth elastic member disposed between the first gear and the seat plate pivot seat. The push block is located between the first gear and the third locking member.

12. The foldable baby stroller according to claim 11, characterized in that: The seat plate pivot includes a third body and a receiving portion extending from the third body toward the front support pivot; the annular back of the pivot is rotatably fitted onto the receiving portion on one side and rotatably fitted onto the receiving portion on the other side.

13. The foldable baby stroller according to any one of claims 6, 10 to 12, characterized in that: A backrest locking mechanism is provided between the backrest pivot seat and the seat plate pivot seat; the backrest locking mechanism includes multiple locking pin holes provided on the outer wall of the seat plate pivot seat, a locking pin that can be moved up and down relative to the backrest, and a sixth elastic member provided between the locking pin and the backrest. Under the action of the sixth elastic member, the locking pin moves downward. When the lower end of the locking pin is engaged in any locking pin hole, the backrest locking mechanism is in a locked state; and when the locking pin is engaged in the foremost locking pin hole, the driving inclined surface and the driven inclined surface are in contact.

Images