Baby stroller

Abstract

The utility model discloses a child stroller which comprises a stroller frame capable of being switched between an unfolded state and a folded state, the stroller frame comprises a bottom support, a main support and a rear support, the lower side of the main support is connected to the rear side of the bottom support in a pivoted mode, the front side of the rear support is connected to the rear side of the bottom support in a pivoted mode, and rear wheels are connected to the rear support. The stroller further comprises a rear linkage device, one side of the rear linkage device is connected with the main support in a matched mode, and the other side of the rear linkage device is connected with the rear support in a matched mode. In the folding process of the frame, when the main support rotates towards the lower front portion, the rear linkage device is driven to drive the rear support to rotate towards the upper front portion. After folding, the overall height of the rear support, the rear wheels and the main support is greatly reduced compared with that in an unfolded state, so that the vertical height of the folded frame can be reduced, the overall size of the folded frame can be reduced, and carrying, carrying and storage are facilitated; and the rear bracket can be linked by rotating the main bracket downwards, so that the folding operation is very simple and convenient.

Description

Technical Field

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

[0002] Strollers are designed for children to ride in, thereby reducing the burden on parents who carry their children and making it more convenient for parents to take their children out.

[0003] A stroller typically consists of a frame and a seat attached to the frame. To make it more convenient to use, the frame is usually designed to be able to switch between an unfolded and folded state. However, some strollers have a cumbersome frame folding operation, and the folded size is relatively large, making them inconvenient to move, carry, and store. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a children's stroller that is easy to fold and has a small size when folded.

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

[0006] A stroller includes a frame that can be switched between an unfolded state and a folded state. The frame includes a base support, a main support pivotally connected to the rear side of the base support, and a rear support pivotally connected to the rear side of the base support. A rear wheel is connected to the rear support. The stroller also includes a rear linkage device, one side of which is connected to the main support and the other side of which is connected to the rear support. During the folding process of the frame, when the main support rotates forward and downward, the rear linkage device is driven to drive the rear support to rotate forward and upward.

[0007] The stroller also includes a front support pivotally connected to the front side of the main support, and a front wheel is connected to the front support; a front linkage device is provided between the front support and the rear support, the front side of the front linkage device is connected to the front support, and the rear side is connected to the rear support; when the rear support rotates forward, the front linkage device is driven to drive the front support to rotate forward and upward.

[0008] The lower side of the main support is pivotally connected to the bottom support around the first pivot, and the front side of the rear linkage device is pivotally connected to the main support around the second pivot, and the rear side is pivotally connected to the rear support; when the frame is in the unfolded state, the first pivot is located in front of and / or above the second pivot.

[0009] The rear support includes two rear legs pivotally connected to the left and right sides of the main support, and two first connecting pieces connected to the left and right rear legs respectively. The rear linkage device includes two first linkage pieces, the front sides of which are pivotally connected to the left and right sides of the main support, and the rear sides of which are pivotally connected to the first connecting pieces.

[0010] The front linkage device is pivotally connected to the front support on the front side and to the rear support on the rear side; the front linkage device includes two second linkage components on the left and right, and two third linkage components on the left and right; the two second linkage components on the left and right are respectively connected to the two rear feet and can rotate together with the rear feet, the rear sides of the two third linkage components on the left and right are respectively pivotally connected to the two second linkage components, and the front sides are both pivotally connected to the front support; when the frame is in the unfolded state, the pivot position of the third linkage component on the same side with the second linkage component is located behind the position where the rear foot is connected to the second linkage component.

[0011] The front support includes two front legs, one on the left and one on the right, both of which are pivotally connected to the bottom support. The front ends of the two third linkage members are pivotally connected to one of the front legs respectively. Alternatively, the front support also includes a connecting part, the left and right ends of which are connected to the two front legs respectively and can rotate together with the two front legs. The front ends of the two third linkage members are pivotally connected to the connecting part.

[0012] The main support includes a support tube pivotally connected to the lower end of the main support, and a push handle tube that is movably connected to the support tube on its lower side. The lower end of the support tube is fixedly connected to a connecting seat, and the connecting seat is pivotally connected to the bottom support.

[0013] The bottom support has an upward-opening receiving cavity on its rear side, and the connecting seat is placed in the receiving cavity; the left and right side walls of the receiving cavity are spaced apart from the corresponding side walls of the bottom support, and the first linkage, third linkage, and second linkage on the corresponding side are sequentially arranged between the side walls of the receiving cavity and the side walls of the bottom support.

[0014] A first locking device is provided between the support tube and the bottom bracket to restrict their relative rotation. The lower end of the support tube is connected to a first driving member, and the first locking device and the first driving member are configured such that the first driving member can unlock the first locking device as the push tube moves downward.

[0015] The first locking device includes a first locking member rotatably connected to the connecting seat in a seesaw manner, a first elastic member disposed between the first locking member and the connecting seat, and a locking protrusion protruding from the corresponding side wall of the receiving cavity. Under the action of the first elastic member, the upper side of the first locking member rotates towards the support tube and extends into the support tube, while the lower side rotates towards the direction of the locking protrusion and engages with the lower side of the locking protrusion, thus the first locking device is in a locked state. The lower side of the first driving member facing the first locking member is configured as an inclined surface or an arc surface. As the first driving member moves downward with the push handle tube, it pushes the upper side of the first locking member to rotate in the opposite direction through the inclined surface or arc surface, thereby causing the lower side of the first locking member to rotate and move towards the side of the support tube and disengage from the hook of the locking protrusion, thus unlocking the first locking device.

[0016] Because this utility model adopts the above technical solution, it has the following beneficial effects:

[0017] 1. Because the rear support rotates and moves forward and upward when folded, the overall height of the rear support, rear wheel and main support is greatly reduced compared to the unfolded state. This reduces the vertical height of the frame after folding, thereby reducing the overall volume of the frame after folding. The folded frame is smaller and easier to transport, carry and store.

[0018] 2. When folded, the front support can also rotate and move forward and upward, thereby further reducing the vertical height of the frame after folding, and thus further reducing the overall volume of the frame after folding.

[0019] 3. When folding, simply rotate the main support downwards to activate the rear support, making the folding operation very simple; moreover, when the rear support is rotated forward and upward, it can also activate the front support to rotate forward and upward, making the folding operation even simpler.

[0020] 4. Moving the push handle tube downwards will unlock the first locking device. This not only reduces the overall length of the main support 2 after folding, thus reducing the overall volume of the frame after folding, but also makes the folding operation even simpler.

[0021] 5. Pressing the second drive component unlocks the second locking device, allowing the push handle tube to move downwards, thus further simplifying the closing operation;

[0022] 6. The overall structure of the frame is simple, and its size is not large when unfolded, making it lightweight and easier to use; it also reduces manufacturing costs. Attached Figure Description

[0023] Figure 1 This is a three-dimensional plan view of the stroller frame of this utility model in its unfolded state;

[0024] Figure 2 This is a three-dimensional schematic diagram of the stroller frame of this utility model in its unfolded state from another angle;

[0025] Figure 3 This is a plan view of the stroller frame of this utility model in its unfolded state;

[0026] Figure 4 This is a top-view magnified three-dimensional schematic diagram of the stroller frame of this utility model in its unfolded state;

[0027] Figure 5 This is an exploded enlarged schematic diagram of some components of the stroller frame of this utility model;

[0028] Figure 6This is a schematic diagram of the combination of the pivot seat of the stroller frame and the support tube of the first linkage component 4 of this utility model;

[0029] Figure 7 According to Figure 4 Enlarged schematic diagram of part B in the middle;

[0030] Figure 8 According to Figure 7 A magnified diagram of the explosion;

[0031] Figure 9 According to Figure 4 An enlarged schematic diagram of section C;

[0032] Figure 10 According to Figure 3 A cross-sectional view along the AA direction;

[0033] Figure 11 According to Figure 10 An enlarged schematic diagram of section D in the middle;

[0034] Figure 12 According to Figure 10 An enlarged schematic diagram of section E in the middle;

[0035] Figure 13 According to Figure 10 Enlarged schematic diagram of section F in the middle;

[0036] Figure 14 According to Figure 13 An enlarged, exploded view of the components in the diagram without cross-section;

[0037] Figure 15 An enlarged schematic diagram of a locking component for a children's stroller frame;

[0038] Figure 16 An enlarged schematic diagram of the first drive component of the children's stroller frame of the utility model;

[0039] Figure 17 An enlarged schematic diagram of the main body of the third drive component of the utility model children's stroller frame;

[0040] Figure 18 An enlarged schematic diagram of the combination of the third drive component and the locking component of the utility model children's stroller frame;

[0041] Figure 19 An enlarged schematic diagram of the main body of the first and third drive components of the utility model children's stroller frame;

[0042] Figure 20 This is a cross-sectional schematic diagram of the stroller frame of this utility model in the process of being folded up;

[0043] Figure 21 According to Figure 20 Enlarged schematic diagram of section G in the middle;

[0044] Figure 22 This is a plan view of the stroller frame of this utility model in the process of being folded up;

[0045] Figure 23 This is a plan view of the stroller frame of this utility model in the folded state;

[0046] Figure 24 This is a plan view of the stroller frame of this utility model in its folded state from another angle;

[0047] Figure 25 This is a three-dimensional schematic diagram of the stroller frame of this utility model in the folded state;

[0048] Figure 26 This is a three-dimensional schematic diagram of the stroller frame of this utility model, which is connected to a seat and a canopy. Detailed Implementation

[0049] like Figures 1 to 9 As shown, this utility model discloses a children's stroller, which includes a part that can be extended in the unfolded state and...

[0050] The stroller frame 100, which can switch between folded and closed states, includes a base support 1, a main support 2 pivotally connected to the rear side of the base support 1 on its lower side, and a rear support 3 pivotally connected to the rear side of the base support 1 on its front side. A rear wheel 30 is connected to the rear support 3. The stroller also includes a rear linkage device, which is connected to the main support 2 on one side and to the rear support 3 on the other side. During the folding and closing process of the stroller frame 100, when the main support 2 rotates forward and downward, the rear linkage device is driven to drive the rear support 3 to rotate forward and upward.

[0051] In this embodiment, the lower side of the main support 2 is pivotally connected to the bottom support 1 around the first pivot 20, and the front side of the rear linkage device is pivotally connected to the main support 2 around the second pivot 201, while the rear side is pivotally connected to the rear support 3. When the frame 100 is in the unfolded state, the first pivot 20 is located in front of and / or above the second pivot 201. Thus, during the folding process, when the main support 2 rotates forward and downward around the first pivot 20, it can pull the front side of the rear linkage device to rotate upward, thereby pulling the rear support 3 to rotate forward.

[0052] The rear support 3 includes two rear legs 31 pivotally connected to the left and right sides of the main support 2, and first connecting members 32 connected to the left and right rear legs at their respective ends. The rear linkage device includes a first linkage 4, the front side of which is pivotally connected to the main support 2, and the rear side of which is pivotally connected to the first connecting member 32. That is, the front side of the first linkage 4 is pivotally connected to the main support 2 around the second pivot 201. Therefore, when the main support 2 rotates forward and downward around the first pivot 20, it will pull the front side of the first linkage 4 to rotate upward, thereby pulling the first connecting member 32 to rotate forward and upward, and thus the entire rear support 3 is pulled forward and upward. When the frame 100 is in the unfolded state, the first connecting member 32 is located behind the bottom support 1.

[0053] In this embodiment, the rear linkage device includes two first linkage members 4 on the left and right sides. The front sides of the two first linkage members 4 are respectively pivotally connected to the left and right sides of the main support 2, and the rear sides are both pivotally connected to the first connecting member 32.

[0054] The rear wheels 30 are connected to the side of each of the left and right rear feet 31 that is away from the base bracket 1.

[0055] The stroller also includes a front support 5 pivotally connected to the front side of the main support 2, and a front wheel 50 is connected to the front support 5; a front linkage device is provided between the front support 5 and the rear support 3, the front side of the front linkage device is connected to the front support 5 and the rear side is connected to the rear support 3; when the rear support 3 rotates forward, the front linkage device is driven to drive the front support 5 to rotate forward and upward.

[0056] In this embodiment, the front linkage device is pivotally connected to the front support 5 on its front side and to the rear support 3 on its rear side. Specifically, the front linkage device includes two second linkage members 61 on the left and right, and two third linkage members 62 on the left and right. The two second linkage members 61 are respectively connected to the two rear legs 31 and can rotate together with the rear legs 31. The rear sides of the two third linkage members 62 are pivotally connected to the two second linkage members 61, and the front sides are both pivotally connected to the front support 5. When the frame 100 is in the unfolded state, the pivot position of the third linkage member 62 on the same side with the second linkage member 61 is located behind the position where the rear legs 31 are connected to the second linkage member 61. With this configuration, when the rear legs 31 rotate forward, the second linkage member 61 rotates forward along with them, thereby driving the third linkage member 62 to rotate and move forward as well. In this way, the third linkage member 62 can drive the front support 5 to rotate relative to the bottom support 1.

[0057] The base support 1 includes a top wall 11 and a side wall 12 extending downward from the outer edge of the top wall 11. The two rear legs 31 are pivotally connected to the outer sides of the corresponding side walls 12. Specifically, a pivot 311, which can rotate with the side leg 31 facing the side wall 12, is connected to the side leg 31. The end of the pivot 311 opposite to the rear leg 31 can rotatably pass through the inner side of the side wall 12 from the outside in. The second linkage 61 is located on the inner side of the side wall 12 and is fixedly connected to the pivot 311. The third linkage 62 is also located on the inner side of the side wall 12. Furthermore, the second linkage 61 is located between the third linkage 62 and the side wall 12, thus facilitating the assembly of the second linkage 61 and the third linkage 62.

[0058] The second linkage 61 includes a connecting section 611 connected to the pivot 311 and a pivot section 612 extending rearward from the connecting section 611. The rear side of the third linkage 62 is pivotally connected to the pivot section 612. In this embodiment, a receiving groove 120 is provided on the inner side of the sidewall 12. The connecting section 611 is relatively fixedly sleeved on the outside of the pivot 311, and the connecting section 611 is at least partially rotatably placed within the receiving groove 120. The connecting member is located outside the receiving groove 120. A first positioning member 13 has its middle portion spanning the lower side of the connecting section 611, and both ends of the first positioning member 13 are connected to the bottom wall of the sidewall of the receiving groove 120. In this way, the connecting segment 611 can only rotate within the space jointly defined by the receiving groove 120 and the first positioning member 13, thereby ensuring not only the stability of the pivot connection between the rear foot 31 and the connecting segment 611, but also the stability of the function of the second linkage member 61 driving the third linkage member 62 when rotating, and thus ensuring the stability of the linkage rotation function of the front bracket 5.

[0059] Furthermore, one side of the pivot 311 along its axial direction is set as a straight surface 3110. Correspondingly, one side of the inner hole of the connecting segment 611 along its axial direction is also set as a straight surface. Thus, when the connecting segment 611 is fitted onto the pivot 311, they are straight surfaces facing each other. Therefore, when the pivot 311 rotates with the rear foot 31, the second linkage 61 will rotate together. In addition, the pivot 311 and the second linkage 61 can be connected by screws or rivets to make the connection more secure. This ensures that when the rear foot 31 rotates, it can drive the second linkage 61 to rotate, and thus drive the front bracket 5 to rotate through the second linkage 61 and the third linkage 62.

[0060] The rear side wall 12 of the base bracket 1 has a downward-opening notch 122 at the position corresponding to the first linkage 4. The front side of the first linkage 4 extends into the side wall 12 through the notch 122 and is pivotally connected to the main bracket 2. Because the notch 122 is downward-opening, the rotational movement of the first linkage 4 is not hindered when it is closed.

[0061] The front support 5 includes two front legs 51, both of which are pivotally connected to the base support 1, and each front leg 51 is connected to the front wheel 50.

[0062] In this embodiment, the front support 5 further includes a connecting portion 52, the left and right ends of which are connected to the left and right front legs 51 respectively and can rotate together with the two front legs 51. The front ends of the two third linkage members 62 are pivotally connected to the connecting portion 52. In this way, the rotation of the two front legs 51 relative to the bottom support 1 can be more synchronized.

[0063] The opposite ends of the left and right front feet 51 (i.e., the right end of the left front foot 51 and the left end of the right front foot 51) are respectively fixedly connected to the left and right ends of the connecting part 52. This fixed connection can be formed as one piece, that is, the two front feet 51 and the connecting part 52 are formed as one piece, or it can be fixedly connected by fasteners (such as screws), as long as the connecting part 52 can rotate together with the two front feet 51.

[0064] In other embodiments, the connecting part 52 may be omitted, and the front ends of the two third linkage members 62 may be directly pivotally connected to one of the front feet 51.

[0065] In this embodiment, each of the front feet 51 is provided with a pivot portion 511. Correspondingly, pivot grooves 15 are provided on the left and right sides of the front side of the base bracket 1. The pivot portions 511 on the same side are at least partially rotatably placed in the pivot grooves 15. During assembly, one side of the pivot portion 511 is placed in the pivot groove 15, and the middle part of a second positioning member 14 spans across the side of the pivot portion 511 away from the base bracket 1. The two ends of the second positioning member 14 are then fixedly connected to the main bracket 2. In this way, the pivot portion 511 can rotate relative to the base bracket 1 without detaching from the main bracket 2. In this embodiment, the lower side of the base bracket 1 is provided with the pivot groove 15 with its opening facing downwards. The middle part of the second positioning member 14 spans across the lower side of the pivot portion 511, and the two ends of the second positioning member 14 are then fixedly connected to the lower side of the main bracket 2.

[0066] Preferably, the center lines of the pivot portions 511 of the left and right front feet 51 are collinear or parallel to each other, and correspondingly, the center lines of the left and right pivot grooves 15 are also collinear or parallel to each other. That is, if one front foot 51 is pivotally connected to the main support 2 around pivot four, and the other front foot 51 is pivotally connected to the main support 2 around pivot five, then the center lines of pivot four and pivot five are collinear or parallel to each other. In this way, the problem that the two front feet 51 cannot rotate relative to the main support 2 simultaneously can be avoided. In this embodiment, the center lines of the pivot portions 511 of the left and right front feet 51 are collinear.

[0067] Preferably, the two third linkage members 62 are also fixedly connected to the left and right sides of at least one second connecting member 63. In this embodiment, the second connecting member 63 is provided with front and rear parts, and the left and right ends of each second connecting member 63 are respectively connected to the two third linkage members 62. This arrangement further ensures the synchronization of the rotation and movement of the two third linkage members 62, and also ensures the uniformity of the driving force on the front support 5, thereby further ensuring the synchronization of the rotation of the two front feet 51. Preferably, the two second connecting members 63 are arranged in parallel front and rear, and the fixed connection method between the second connecting member 63 and the third linkage member 62 can be any known and feasible structure.

[0068] Each of the front feet 51 is also provided with a front wheel connecting part 512, and each of the front wheel connecting parts 512 is connected to a front wheel seat 54, on which the front wheel 50 is connected. The connection method between the front wheel seat 54 and the front wheel 50 is a known technology, and therefore will not be described in detail here.

[0069] The main support 2 includes a support tube 21 pivotally connected to the lower end of the main support 2, and a push handle tube 22 movably connected to the support tube 21 on its lower side. The front side of the rear linkage device is pivotally connected to the support tube 21. In this embodiment, the lower end of the support tube 21 is fixedly connected to a connecting seat 23, and the connecting seat 23 is pivotally connected to the bottom support 1, that is, the connecting seat 23 is pivotally connected to the bottom support 1 rotatably around the rotating shaft 20. The front side of the first linkage member 4 is pivotally connected to the connecting seat 23, that is, the front sides of the two first linkage members 4 are respectively pivotally connected to the left and right sides of the connecting seat 23. The front side of the connecting seat 23 is pivotally connected to the bottom support 1, and the rear side is provided with a receiving hole 231, in which the lower side of the support tube 21 is placed.

[0070] The base support 1 has an upward-opening receiving cavity 16 on its rear side. The connecting seat 23 is placed inside the receiving cavity 16, and the front side of the connecting seat 23 is pivotally connected to the left and right side walls 12 on the front side of the receiving cavity 16 via the pivot 20. The side walls 161 on both sides of the receiving cavity 16 each have upward-opening notches 162. The front sides of the two first linkage members 4 are located outside the side walls 12 on the left and right sides of the receiving cavity 16, respectively, and are pivotally connected to the connecting seat 23 at these notches. Therefore, when the connecting seat 23 rotates around the pivot 20, the front sides of the first linkage members 4 can be driven to rotate upwards without obstruction.

[0071] The side walls 161 on the left and right sides of the receiving cavity 16 are spaced apart from the side walls 12 on the corresponding sides of the bottom support 1. The first linkage 4, the third linkage 62, and the second linkage 61 on the corresponding sides are sequentially arranged between the side walls of the receiving cavity 16 and the side walls 12 of the bottom support 1, thereby making the overall structure more compact and the layout more reasonable.

[0072] The rear sidewall of the receiving cavity 16 may be spaced apart from the rear sidewall of the base support 1 and located in front of the rear sidewall of the base support 1; alternatively, the rear sidewall of the receiving cavity 16 may be integral with the rear sidewall of the base support 1.

[0073] Combination Figure 10 , 11 As shown, a first locking device for limiting the relative rotation of the support tube 21 and the bottom bracket 1 is provided. The lower end of the support tube 21 is connected to a first driving member 71, and the first locking device and the first driving member 71 are configured to cooperate such that the first driving member 71 can unlock the first locking device as the push handle tube 22 moves downward.

[0074] The first locking device includes a first locking member 72 rotatably connected to the connecting seat 23 in a seesaw manner, a first elastic member 73 disposed between the first locking member 72 and the connecting seat 23, and a locking protrusion 161 protruding from the corresponding side wall 12 of the receiving cavity 16. A through hole (not shown) is provided on the wall of the support tube 21 at the position corresponding to the first locking member 72, and a through hole 232 is also provided on the receiving hole 231 at the position corresponding to the first locking member 72. Under the action of the first elastic member 73, the upper side of the first locking member 72 rotates towards the support tube 21 and extends into the support tube 21 through the through hole, while the lower side rotates towards the direction of the locking protrusion 161 and extends out of the connecting seat 23 through the through hole 232, locking onto the lower side of the locking protrusion 161. Thus, the first locking device is in a locked state. In this way, the locking protrusion 161 blocks the upward rotation of the first locking member 72, thereby preventing the main support 2 from rotating forward and downward. The first locking member 72 is rotatably connected to the rear side of the connecting seat 23 around the rotating shaft 721.

[0075] The lower side of the first driving member 71 facing the first locking member 72 is configured as a slope or arc surface 710. As the first driving member 71 moves downward with the push handle tube 22, it pushes the upper side of the first locking member 72 to rotate in the opposite direction through this slope or arc surface. In this way, the lower side of the first locking member 72 will rotate and move towards the side where the support tube 21 is located, thus disengaging from the hook of the locking protrusion 161 (e.g., Figure 20 , 21As shown in the diagram, the first locking device unlocks, and the connecting seat 23 can rotate relative to the bottom bracket 1 around the pivot 20, meaning the main bracket 2 can rotate relative to the main bracket 2 together with the first locking member 72. Preferably, the upper side of the locking member is also configured as a slope or arc surface, so that the first driving member 71 can drive the first locking member 72 more smoothly. Specifically, when the first driving member 71 moves downward with the push handle tube 22 until its slope or arc surface contacts the upper side of the first locking member 72, the first driving member 71 continues to move downward, which will push the upper side of the first locking member 72 to rotate in the opposite direction.

[0076] In this embodiment, the first locking member 72 is rotatably connected to the rear side of the connecting seat 23. Therefore, under the action of the first elastic member 73, the upper side of the first locking member 72 rotates forward and the lower side rotates backward to engage with the lower side of the locking protrusion 161. When driven by the first driving member 71, the upper side of the first locking member 72 rotates backward and the lower side rotates forward to disengage from the locking protrusion 161.

[0077] like Figures 13 to 19 As shown, a second locking device is provided between the push handle tube 22 and the support tube 21 to restrict their relative vertical movement. The push handle tube 22 can only be moved downward after the second locking device is unlocked.

[0078] The second locking device includes a second locking member 81 that is movably connected to the push handle tube 22, a second elastic member 82 disposed between the second locking member 81 and the push handle tube 22, and a mating part disposed on the support tube 21. Under the action of the second elastic member 82, the second locking member 81 and the mating part cooperate, the second locking device is in a locked state, and the push handle tube 22 cannot move up and down relative to the support tube 21.

[0079] The second locking member 81 includes a body 811 and a locking member 812 disposed on one side of the body 811. In this embodiment, the locking member 812 includes an upper locking part 8121 and a lower locking part 8122 disposed at an interval on one side of the body 811. The locking part 812 includes a locking hole 211 disposed on the wall of the support tube 21 and the upper end wall of the support tube 21. The push handle tube 22 has corresponding upper and lower through holes on its wall. When the second elastic member 82 is activated, the second locking member 81 moves toward the direction of the first locking hole 211. The upper locking part 8121 passes through the upper through hole and is located at the upper end of the support tube 21. The lower locking part 8122 passes through the lower through hole and is engaged in the locking hole 211. The second locking device is in a locked state, so the second locking member 81 cannot move up and down, thereby preventing the push handle from moving up and down relative to the support tube 21.

[0080] In other embodiments, the mating part may include two locking holes 211 on the wall of the support tube 21, with the upper locking part 8121 and the lower locking part 8122 of the second locking member 81 respectively engaging in the two locking holes 211. Alternatively, the support tube 21 may have one locking hole 211, and only one locking part 812, which engages in that single locking hole 211. In this way, the second locking member 81 cannot move up or down, preventing the push handle from moving up or down relative to the support tube 21.

[0081] The upper side of the first driving member 71 is fixedly connected to the lower side of the push handle tube 22, and the upper side of the first driving member 71 is provided with a mounting cavity 712. The inner wall of the mounting cavity 712 is provided with an upper limit part 713 and a lower limit part 714 at intervals. The second locking member 81 is movably placed between the upper limit part 713 and the lower limit part 714. Corresponding to the locking part 812 of the second locking member 81, the cavity wall of the mounting cavity 712 and the tube wall of the push handle tube 22 are both provided with through holes 715 for the locking part 812 to pass through.

[0082] The push handle tube 22 is provided with an unlocking device for unlocking the second locking device. (Combined) Figure 10 , 12 As shown, in this embodiment, the unlocking device includes a second driving member 91 that is movably connected to the upper side of the push handle, and a third driving member 93 that is movably connected to the push handle tube 22. The upper side of the third driving member 93 is configured to cooperate with the second driving member 91, and the lower side is configured to cooperate with the locking member. The third driving member 93 is driven to move the second driving member 91 relative to the push handle tube 22, and the third driving member 93 is driven to move downward, thereby pushing the locking member to move and disengage from the locking part 812, thereby unlocking the second locking device.

[0083] Preferably, one side of the second driving member 91 is located inside the push handle tube 22, and the other side is located outside the push handle tube 22, thereby facilitating the operation of the second driving member 91. The end face of the second driving member 91 located inside the push handle tube 22 is set as a slope 911, and / or the upper side of the third driving member 93 facing the second driving member 91 is also set as a slope 931. In this embodiment, preferably, both the second driving member 91 and the third driving member 93 are provided with slopes to cooperate.

[0084] The lower end of the third driving member 93 is provided with a main body 930 located within the mounting cavity 712, which can move relatively vertically. The main body 930 is square-frame shaped and includes a top plate 931, a bottom plate 932, and two side plates 933 respectively connecting the top plate 931 and the bottom plate 932. The upper limit portion 713 and the lower limit portion 714 extend between the top wall 11 and the bottom wall; that is, the top plate 931 of the square-frame main body 930 is located between the upper limit portion 713 and the top wall 11 of the mounting cavity, and the bottom plate 932 is located between the lower limit portion 714 and the bottom wall of the mounting cavity 712. A third elastic member 94 is provided between the upper limit portion 713 and the top plate 931. Under the action of the third elastic member 94, the third driving member 93 maintains an upward moving tendency. To facilitate better assembly of the second locking member 81, the third driving member body 930, and the first driving member 71, the mounting cavity 712 of the first driving member is set to open towards the side opposite to the locking hole. After the body 930 and the second locking member 81 are installed in the mounting cavity 712, a side cover 70 is then connected to the opening side of the mounting cavity 712.

[0085] The inner sides of both side plates 933 are provided with a first driving part 934, the lower side of the first driving part 934 is provided with a driving inclined surface 9341, or / and, and the upper end surfaces of both sides of the second locking member body 811 are provided with a driven inclined surface 8111.

[0086] In this embodiment, the second locking member 81 has notches 813 on both sides, thereby dividing the body 811 into an upper section 814 and a lower section 815 on both sides. The upper end surfaces of the two sides of the body 811 are the upper end surfaces of the upper section 814. Preferably, the upper end surface of the lower section 815 is also configured as a driven inclined surface 8151. Correspondingly, the inner side of the two side plates 933 is also provided with a second driving part 935. The second driving part 935 extends into the notches 813, and the lower side of the second driving part 935 is also configured as a driving inclined surface 9351.

[0087] The specific operation for folding this utility model of children's stroller is as follows:

[0088] Pressing the second driving member 91 into the push handle tube 22 causes the third driving member 93 to move downwards through the interaction of the corresponding inclined surfaces on the second driving member 91 and the third driving member 93. As the third driving member 93 moves downwards, the second locking member 81 moves into the push handle tube 22 through the interaction of the driving and driven inclined surfaces. This causes the upper locking part 8121 of the second locking member 81 to no longer be located at the upper end of the support tube 21, and the lower locking part 8122 to disengage from the locking hole 211. The second locking device is then unlocked, and the push handle tube 22 can move downwards relative to the support tube 21. At this time, moving the push handle tube 22 downwards causes the first driving member 71, the third driving member 93, and the second locking member 81 to move together until the lower side of the third driving member 93 pushes the first unlocking member to rotate, thus unlocking the first locking device. At this time, the push handle tube 22 is rotated forward and downward, causing the entire main bracket 2 to rotate around the pivot 20. This causes the rear side of the connecting seat 23 to rotate upward, thereby driving the front side of the first linkage 4 to also rotate upward. The first connecting member 32 is then pulled forward and upward by the rear side of the first linkage 4, thus pulling the entire rear bracket 3 forward and upward. As the rear bracket 3 rotates forward and upward, the second linkage 61 rotates along with it, that is, the rear side of the second linkage rotates forward, thereby driving the third linkage 62 to rotate forward. The front side of the forward-rotating third linkage 62 then drives the connecting part 52 to rotate. Because the connecting part 52 is located below the bottom bracket 1, it is driven to rotate downward, causing the front foot 51 to rotate forward and upward (as shown in the image). Figure 22 (As shown); until the push handlebar tube 22 can no longer be rotated downwards, the frame 100 is in the retracted state (as shown). Figures 23 to 25 (As shown). When the frame 100 is in the folded state, the main support 2 and the bottom support 1 are relatively close together. Because the rear support 3 rotates forward and upward, the first connecting piece 32 is located below the bottom support 1. As a result, the overall height of the rear support 3, the rear wheel 30 and the main support 2 is greatly reduced compared to the unfolded state. This reduces the vertical height of the frame 100 after it is folded, and thus reduces the overall volume of the frame 100 after it is folded. In addition, the front wheel 50 also rotates forward and upward with the front support 5. As a result, the overall height of the front support 5, the front wheel 50 and the main support 2 is also greatly reduced compared to the unfolded state. This further reduces the vertical height of the frame 100 after it is folded, and further reduces the overall volume of the frame 100 after it is folded, thus facilitating handling, carrying and storage.

[0089] As described above, when folding the stroller frame 100 of this utility model, simply rotating the main support 2 downwards will cause the rear support 3 and the front support 5 to rotate in conjunction, making the folding operation very simple. Furthermore, moving the push handle tube 22 downwards will unlock the first locking device, thus reducing the overall length of the main support 2 after folding, thereby reducing the overall volume of the frame 100 after folding, and further simplifying the folding operation. Pressing the second drive member 91 will unlock the second locking device, allowing the push handle tube 22 to move downwards, further simplifying the folding operation.

[0090] Furthermore, because the overall structure of the frame 100 adopts a bottom bracket 1 + a support tube 21 + a push handle tube 22 + a rear bracket 3 + a front bracket 5, the overall structure of the frame 100 of this utility model of children's stroller is simple, making it small in size and lightweight when unfolded, thus making it more convenient to use; and it can also reduce manufacturing costs.

[0091] In this embodiment, preferably, the front wheel seat 54 is configured such that, in the unfolded state of the frame 100, the front wheel seat 54 is pivotally connected to the front wheel connection portion 512 rotatably about a vertical axis. This configuration allows the front wheel seat 54 to rotate 90 degrees relative to the front wheel connection portion 512 when folded, thereby ensuring that the front wheel 50 is generally horizontal to the ground (e.g., ...). Figure 3 and Figure 23 (The angle of the front wheel changes by 50 degrees), thus further reducing the overall height of the frame 100 when folded, that is, further reducing the overall volume of the frame 100 when folded. The rotational connection and orientation of the front wheel seat 54 and the front wheel connection part 512 can adopt any known and feasible technology, so it will not be described in detail here.

[0092] like Figure 26 As shown, the stroller of this utility model also includes a seat 200 connected to the support tube 21 and a canopy 300 connected to the upper side of the push handle tube 22. The structure of the seat 200 and its connection with the support tube 21, and the structure of the canopy 300 and its connection with the push handle tube 22 can be any known and feasible technology, and since they are not the inventive point of this utility model, they will not be described in detail here.

[0093] The above definitions of up, down, front, back, left, and right directions are for reference under normal use conditions. That is, the direction where the front wheel 50 is located is front, the direction where the rear wheel 30 is located is back, the direction where the push handle is located is up, and the direction where the front wheel 50 and the rear wheel 30 are located is down.

[0094] 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 this utility model 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 this utility model.

[0095] 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 stroller comprising a frame that can be switched between an unfolded state and a folded state, characterized in that: The frame includes a base support, a main support pivotally connected to the rear side of the base support, and a rear support pivotally connected to the rear side of the base support. The rear support is connected to a rear wheel. The stroller also includes a rear linkage device, which is connected to the main support on one side and to the rear support on the other side. During the folding process of the frame, when the main support rotates forward and downward, the rear linkage device is driven to drive the rear support to rotate forward and upward.

2. The stroller according to claim 1, characterized in that: It also includes a front bracket pivotally connected to the front side of the main bracket, and a front wheel is connected to the front bracket; a front linkage device is provided between the front bracket and the rear bracket, the front side of the front linkage device is connected to the front bracket and the rear side is connected to the rear bracket; when the rear bracket rotates forward, the front linkage device is driven to drive the front bracket to rotate forward and upward.

3. The stroller according to claim 2, characterized in that: The lower side of the main support is pivotally connected to the bottom support around the first pivot, and the front side of the rear linkage device is pivotally connected to the main support around the second pivot, and the rear side is pivotally connected to the rear support; when the frame is in the unfolded state, the first pivot is located in front of and / or above the second pivot.

4. The stroller according to claim 2 or 3, characterized in that: The rear support includes two rear legs pivotally connected to the left and right sides of the main support, and two first connecting pieces connected to the left and right rear legs respectively. The rear linkage device includes two first linkage pieces, the front sides of which are pivotally connected to the left and right sides of the main support, and the rear sides of which are pivotally connected to the first connecting pieces.

5. The stroller according to claim 4, characterized in that: The front linkage device is pivotally connected to the front support on the front side and to the rear support on the rear side; the front linkage device includes two second linkage components on the left and right, and two third linkage components on the left and right; the two second linkage components on the left and right are respectively connected to the two rear feet and can rotate together with the rear feet, the rear sides of the two third linkage components on the left and right are respectively pivotally connected to the two second linkage components, and the front sides are both pivotally connected to the front support; when the frame is in the unfolded state, the pivot position of the third linkage component on the same side with the second linkage component is located behind the position where the rear foot is connected to the second linkage component.

6. The stroller according to claim 5, characterized in that: The front support includes two front legs, one on the left and one on the right, both of which are pivotally connected to the bottom support. The front ends of the two third linkage members are pivotally connected to one of the front legs respectively. Alternatively, the front support also includes a connecting part, the left and right ends of which are connected to the two front legs respectively and can rotate together with the two front legs. The front ends of the two third linkage members are pivotally connected to the connecting part.

7. The stroller according to claim 5 or 6, characterized in that: The main support includes a support tube pivotally connected to the lower end of the main support, and a push handle tube that is movably connected to the support tube on its lower side. The lower end of the support tube is fixedly connected to a connecting seat, and the connecting seat is pivotally connected to the bottom support.

8. The stroller according to claim 7, characterized in that: The bottom support has an upward-opening receiving cavity on its rear side, and the connecting seat is placed in the receiving cavity; the left and right side walls of the receiving cavity are spaced apart from the corresponding side walls of the bottom support, and the first linkage, third linkage, and second linkage on the corresponding side are sequentially arranged between the side walls of the receiving cavity and the side walls of the bottom support.

9. The stroller according to claim 8, characterized in that: A first locking device is provided between the support tube and the bottom bracket to restrict their relative rotation. The lower end of the support tube is connected to a first driving member, and the first locking device and the first driving member are configured such that the first driving member can unlock the first locking device as the push tube moves downward.

10. The stroller according to claim 9, characterized in that: The first locking device includes a first locking member rotatably connected to the connecting seat in a seesaw manner, a first elastic member disposed between the first locking member and the connecting seat, and a locking protrusion protruding from the corresponding side wall of the receiving cavity. Under the action of the first elastic member, the upper side of the first locking member rotates towards the support tube and extends into the support tube, while the lower side rotates towards the direction of the locking protrusion and engages with the lower side of the locking protrusion, thus the first locking device is in a locked state. The lower side of the first driving member facing the first locking member is configured as an inclined surface or an arc surface. As the first driving member moves downward with the push handle tube, it pushes the upper side of the first locking member to rotate in the opposite direction through the inclined surface or arc surface, thereby causing the lower side of the first locking member to rotate and move towards the side of the support tube and disengage from the hook of the locking protrusion, thus unlocking the first locking device.

11. The stroller according to any one of claims 1 to 3, 5 to 6, and 8 to 10, characterized in that: It also includes a seat connected to the support tube.

Images