Baby stroller

Abstract

The utility model discloses a child stroller which comprises a stroller frame and a seat connected to the stroller frame. The seat comprises a sitting part, the frame comprises a rear support, an upper support, a front support, a handrail, a first linkage piece, a second linkage piece and a third linkage piece, and the lower side of the upper support and the rear side of the front support are pivoted to the rear support; the rear side of the handrail is pivoted with the rear bracket or the rear side of the handrail and the lower side of the upper bracket are coaxially pivoted on the rear bracket; the upper side of the first linkage piece is pivoted with the upper bracket; the rear side of the second linkage piece is pivoted with the rear bracket, the front side of the second linkage piece, the lower side of the first linkage piece and the sitting part are coaxially pivoted or two of the two are pivoted, and the other one is pivoted with any one of the two; one side of the third linkage piece is pivoted with the first linkage piece, and the other side of the third linkage piece is pivoted with the handrail; when the baby stroller is folded, the upper support is rotated towards the lower rear portion, the armrests, the seat sitting portion and the stroller frame can be folded together in a linkage mode, and therefore the whole folding operation is very easy 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, as tools that allow children to sit or lie down, greatly reduce the burden on parents carrying their children, and are therefore widely used. Most strollers are designed to switch between an unfolded and a folded state. When needed, the stroller is unfolded, allowing the child to sit or lie down inside while the parent pushes it. When not in use, the stroller can be folded up. Because a folded stroller is smaller than its unfolded state, it takes up less space, making it much more convenient whether stored at home or taken out.

[0003] A stroller typically consists of a frame and a seat mounted on the frame. Some strollers also have armrests. However, when folding up some strollers, the seat and armrests cannot be folded up together with the frame. This requires additional folding operations for the seat and armrests, making the entire folding operation of the stroller particularly cumbersome. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a children's stroller in which the armrests, seat, and frame components can be folded together, making the overall folding operation very convenient.

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

[0006] A stroller is available that can switch between an unfolded state and a folded state. The stroller includes a frame and a seat connected to the frame. The seat includes a seating section. The frame includes a rear support, an upper support, a front support, an armrest, a first linkage, a second linkage, and a third linkage. The lower side of the upper support is pivotally connected to the rear side of the front support at different positions on the rear support, or the lower side of the upper support and the rear side of the front support are coaxially pivotally connected to the rear support. The rear side of the armrest is pivotally connected to the rear support, or the rear side of the armrest is coaxially pivotally connected to the lower side of the upper support on the rear support. The upper side of the first linkage is pivotally connected to the upper support. The rear side of the second linkage is pivotally connected to the rear support. The front side of the second linkage, the lower side of the first linkage, and the seating section are coaxially pivotally connected, or two of them are pivotally connected, and the third linkage is pivotally connected to either of the other two. One side of the third linkage is pivotally connected to the first linkage, and the other side is pivotally connected to the armrest.

[0007] The lower side of the upper support is pivotally connected to the rear support around a pivot a first pivot or pivotally connected to the rear support coaxially with the front support around a pivot a second pivot. The upper side of the first linkage is pivotally connected to the upper support around a pivot a second pivot. When the frame is in the unfolded state, the pivot a first pivot is located below the pivot a second pivot.

[0008] The lower side of the first linkage is pivotally connected to the seating part and / or the second linkage around the third pivot. When the frame is in the unfolded state, the pivot position with the first linkage is located between the second and third pivots.

[0009] The front side of the third linkage component is pivotally connected to the armrest around the pivot four. When the frame is in the unfolded state, the pivot four is located in front of the pivot position between the armrest and the rear support or the position where the lower side of the armrest and the upper support are pivotally connected to the rear support on the same axis.

[0010] When the frame is in the unfolded state, the pivot position of the seating part with the lower side of the first connecting member and / or the front side of the second linkage member is located behind the pivot position of the seating part with the front support.

[0011] The frame also includes a pivot seat, with the front side of the rear support fixedly connected to the pivot seat, and the lower side of the upper support pivotally connected to the rear side of the armrest and the rear side of the front foot. Preferably, the lower side of the upper support is coaxially pivotally connected to the rear side of the armrest to the pivot seat.

[0012] The seat also includes a backrest, the lower side of which is pivotally connected to a rear support, and a locking mechanism is provided between the backrest and the rear support to restrict their relative rotation; the stroller also includes a first unlocking member that is movably connected to the rear support and a second unlocking member that is movably connected to the pivot seat; the upper side of the first unlocking member cooperates with the second unlocking member, and the lower side cooperates with the locking mechanism; the upper side of the second unlocking member cooperates with the upper support; when the stroller is folded, the rotating upper support can drive the second unlocking member to move downward, and the downward-moving second unlocking member will drive the first unlocking member to move downward and unlock the locking mechanism, thereby allowing the backrest to rotate relative to the rear support; preferably, a first elastic member that can drive the first unlocking member to move upward is provided between the first unlocking member and the rear support.

[0013] The upper support has a drive groove on the side facing the second unlocking member. When the stroller is in the unfolded state, the upper side of the second unlocking member extends into the drive groove. At least one side wall of the drive groove and / or at least one side of the upper side of the second unlocking member is set as an inclined surface. Preferably, the upper side of the first unlocking member and / or the lower side of the second unlocking member is set as an inclined surface.

[0014] The rear support is provided with a first connecting seat, and the lower back is provided with a second connecting seat, the first connecting seat and the second connecting seat are pivotally connected; the locking mechanism is provided between the first connecting seat and the second connecting seat.

[0015] The rear side of the second linkage component is coaxially pivotally connected to the lower back side of the rear bracket.

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

[0017] 1. When folded, the armrests, seat seating area and various components of the frame can fold together, making the overall folding operation very simple;

[0018] 2. When folding, the seat back can also be folded in conjunction, making the overall folding operation of the stroller even simpler. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the stroller of this utility model in its unfolded state;

[0020] Figure 2 This is a three-dimensional schematic diagram of the stroller of this utility model in its unfolded state from another angle;

[0021] Figure 3 According to Figure 2 An enlarged schematic diagram of part A in the middle;

[0022] Figure 4 According to Figure 3 Enlarged schematic diagram of the middle component;

[0023] Figure 5 According to Figure 4 A magnified diagram of the explosion;

[0024] Figure 6 This is an enlarged schematic diagram of the locking component of the child stroller of this utility model;

[0025] Figure 7 This is an enlarged schematic diagram of the combination of the upper bracket, first unlocking component, second unlocking component, and locking component of the child stroller of this utility model;

[0026] Figure 8 This is an enlarged schematic diagram of the second unlocking component of the child stroller of this utility model;

[0027] Figure 9 This is a plan view of the folding process of the stroller of this utility model;

[0028] Figure 10 This is a three-dimensional schematic diagram of the folding process of the children's stroller of this utility model;

[0029] Figure 11 This is a plan view of the stroller of this utility model after it is folded up;

[0030] Figure 12 This is a three-dimensional schematic diagram of the children's stroller of this utility model after it is folded up. Detailed Implementation

[0031] like Figures 1 to 12 As shown, this utility model discloses a stroller that can switch between an unfolded state and a folded state. The stroller includes a frame and a seat connected to the frame. The seat includes a seating section 30. The frame includes a rear support 1, an upper support 2, a front support 6, an armrest 8, a first linkage 71, a second linkage 72, and a third linkage 73. The lower side of the upper support 2 is pivotally connected to the rear side of the front support 6 at different positions on the rear support 1, or the lower side of the upper support 2 and the rear side of the front support 6 are coaxially pivotally connected to the rear support 1. Frame 1; the rear side of the armrest 8 is pivotally connected to the rear support 1 or the rear side of the armrest 8 is coaxially pivotally connected to the lower side of the upper support 2 to the rear support 1; the upper side of the first linkage 71 is pivotally connected to the upper support 2; the rear side of the second linkage 72 is pivotally connected to the rear support 1, and the front side of the second linkage 72, the lower side of the first linkage 71, and the seating part 30 are coaxially pivotally connected or two of them are pivotally connected, and the other one is pivotally connected to either of the two; one side of the third linkage 73 is pivotally connected to the first linkage 71, and the other side is pivotally connected to the armrest 8.

[0032] The lower side of the upper support 2 is pivotally connected to the rear support 2 around the first pivot 20, or pivotally connected to the rear support 1 coaxially with the front support 6 around the first pivot. The upper side of the first linkage 71 is pivotally connected to the upper support 2 around the second pivot 710. When the frame is in the unfolded state, the first pivot 20 is located below the second pivot 710.

[0033] The lower side of the first linkage 71 is rotatably pivotally connected to the seating portion 30 and / or the second linkage 72 around the third pivot 711; when the frame is in the unfolded state, the pivot position with the first linkage 71 is located between the second pivot 710 and the third pivot 711. In this embodiment, preferably, the front side of the second linkage 72 is coaxially pivotally connected to the lower side of the first linkage 71 to the seating portion 30, thereby simplifying assembly.

[0034] The front side of the third linkage 73 is pivotally connected to the armrest 8 around the pivot 730. When the frame is in the unfolded state, the pivot 730 is located in front of the pivot position between the armrest 8 and the rear support 1, or in front of the position where the armrest 8, the lower side of the upper support 2, and the rear support 1 are coaxially pivoted. That is, when the rear side of the armrest 8 is pivotally connected to the rear support 1, the pivot 730 is located in front of the position where the rear side of the armrest 8 and the rear support 1 are pivotally connected; when the rear side of the armrest 8 and the lower side of the upper support 2 are coaxially pivotally connected to the rear support 1, the pivot 730 is located in front of the position where the rear side of the armrest 8 and the lower side of the upper support 2 are coaxially pivotally connected to the rear support 1. In this embodiment, preferably, the lower side of the upper support 2 and the rear side of the armrest 8 are coaxially pivotally connected to the rear support 1, thereby simplifying assembly.

[0035] When the frame is in the unfolded state, the pivot position of the seating part 30 with the lower side of the first connecting member and / or the front side of the second linkage member 72 is located behind the pivot position of the seating part 30 with the front support 6.

[0036] In this embodiment, a connecting portion 61 is fixedly provided on the front support 6, and the front side of the seating portion 30 is pivotally connected to the connecting portion 61. Preferably, the stroller of this utility model also includes a leg rest 62, the upper side of which is pivotally connected to the front side of the connecting portion 61. The relative tilt angle of the leg rest 62 is adjustable, and the adjustment method can be any known and feasible method. This connection portion arrangement facilitates the pivotal connection between the front side of the seating portion and the leg rest, thereby making assembly more convenient. In other embodiments, the front side of the seating portion 30 can also be directly pivotally connected to the front support 6.

[0037] Because this utility model of the stroller adopts the above-mentioned configuration, when the stroller is to be folded, rotating the upper support 2 downwards and backwards pushes the first linkage 71 downwards, thereby driving the front side of the second linkage 72 and the rear side of the seating part 30 to rotate downwards and backwards. This causes the front support 6 to be pulled and rotated backwards by the seating part 30. Furthermore, during the downward movement of the first linkage 71, the third linkage 73 is also driven to move downwards, thereby pulling the armrest 8 downwards and rotating it (e.g., ...). Figure 9 , 10 As shown), the armrest 8, the seating section 30, and all components of the frame can be folded together in a coordinated manner; until the components can no longer rotate relative to each other, the stroller is in the folded state. In this state, the seating section 30, rear support 1, upper support 2, front support 6, armrest 8, first linkage 71, second linkage 72, and third linkage 73 are relatively close to each other (as shown). Figure 11 , 12 As shown in the image, the folded stroller is small in size, making it easy to move, carry, and store.

[0038] In this embodiment, the frame further includes a pivot seat 9. The front side of the rear support 1 is fixedly connected to the pivot seat 9, the lower side of the upper support 2 is pivotally connected to the rear side of the armrest 8, and the rear side of the front foot is also pivotally connected to the pivot seat 9. Preferably, the rear side of the armrest 8 is coaxially pivotally connected to the upper side of the pivot seat 9 along with the lower side of the upper support 2. The rear side of the front support 6 is pivotally connected to the lower front side of the pivot seat 9.

[0039] The seat also includes a backrest 3, the lower side of which is pivotally connected to the rear support 1, and a locking mechanism is provided between the backrest 3 and the rear support 1 to restrict their relative rotation; the stroller also includes a first unlocking member 41 that can be moved up and down relative to the rear support 1 and a second unlocking member 40 that can be moved up and down relative to the pivot seat 9. The upper side of the first unlocking member 41 cooperates with the second unlocking member 40, and the lower side cooperates with the locking mechanism. The upper side of the second unlocking member 40 cooperates with the upper support 2; when the stroller is folded up, the rotating upper support 2 can drive the second unlocking member 40 to move down, and the moving second unlocking member 40 will drive the first unlocking member 41 to move down and unlock the locking mechanism, so that the backrest 3 can rotate relative to the rear support 1. In this way, when the frame is folded up, the backrest 3 of the seat can also be folded up together, thereby making the overall folding operation of the stroller simpler.

[0040] A drive groove 21 is provided on the lower side of the upper support 2 facing the second unlocking member 40. When the stroller is in the unfolded state, the upper side of the second unlocking member 40 extends into the drive groove 21. At least one side wall of the drive groove 21 and / or at least one side of the upper side of the second unlocking member 40 are set as inclined surfaces. Thus, when the upper support 2 rotates backward and downward, the second unlocking member 40 is driven to move downward by the action of the inclined surfaces. In this embodiment, preferably, both side walls of the drive groove 21 are set as inclined surfaces, and correspondingly, the two corresponding sides of the upper side of the second unlocking member 40 are also set as inclined surfaces 401.

[0041] The upper side of the first unlocking member 41 and / or the lower side of the second unlocking member 40 are set as inclined surfaces (as shown in Figure 8, the lower side of the second unlocking member 40 is inclined surface 402). Thus, when the second unlocking member 40 moves downward, the first unlocking member 41 is driven to move downward through the action of the inclined surface.

[0042] A first elastic element 43 (e.g., [missing information]) is provided between the first unlocking element 41 and the rear bracket 1 to drive the first unlocking element 41 to move upward. Figure 5 (As shown). Combined Figure 5 , 7As shown, in this embodiment, the first elastic element 43 is configured as a compression spring, the first unlocking element 41 has a vertically extending first elongated hole 412, the rear support 1 has a protruding abutment 11, the abutment 11 extends into the first elongated hole 412, the upper side of the first elastic element 43 is connected to the top wall of the first elongated hole 412, and the lower side is connected to the abutment 11. When the stroller of this utility model is in the unfolded state, when the drive groove 21 is aligned with the upper side of the second unlocking element 40, under the action of the first elastic element 43, the first unlocking element 41 is driven upward by the elastic element, and the upward-moving first unlocking element 41 will push the second unlocking element 40 to move upward as well, so that the upper side of the second unlocking element 40 extends into the drive groove 21, and the two sides of the upper side of the second unlocking element 40 contact the two side walls of the drive groove 21; with this configuration, when the stroller is switched from the folded state to the unfolded state, under the action of the first elastic element 43, the moving part of the first unlocking element 41 can automatically reset, thereby facilitating the subsequent folding operation. When the stroller of this utility model is folded up, the downward movement of the first unlocking member 41 will compress the first elastic member 43.

[0043] In other embodiments, the first elastic element 43 may also be configured as other known and feasible elastic elements, and when configured as other elastic elements, the relevant settings will also be changed accordingly.

[0044] The rear support 1 is provided with a first connecting seat 12, and the lower end of the backrest 3 is provided with a second connecting seat 31. The first connecting seat 12 and the second connecting seat 31 are pivotally connected, thereby achieving the purpose of pivotally connecting the backrest 3 and the rear support 1. The locking mechanism is provided between the first connecting seat 12 and the second connecting seat 31. Preferably, the rear side of the second linkage 72 is coaxially pivotally connected to the lower side of the backrest 3 (i.e., the second connecting seat 31) of the rear support 1, thereby making assembly simpler.

[0045] The first connecting seat 12 has a first receiving groove 121 on the side facing the second connecting seat 31. The lower side of the first unlocking member 41 extends into the first receiving groove 121 and cooperates with the locking mechanism. The upper side of the first unlocking member 41 and the second unlocking member 40 are disposed within the integral formed after the pivot seat 9 and the rear bracket 1 are fixedly connected. For ease of assembly, the integral is set as a split type, that is, it includes a detachable main body 90 and a cover 91. A space is formed between the main body and the cover to accommodate the upper side of the first unlocking member 41 and the second unlocking member 40. During installation, the second unlocking member 40 is placed in this space, so that the upper side of the first unlocking member 41 is also placed in this space, and the lower side of the first unlocking member 41 is located in the first receiving groove 121. Then, the cover is fixedly connected to the main body. In this way, the installation of the upper side of the first unlocking member 41 and the second unlocking member 40 with the pivot seat 9 and the rear bracket 1 is completed.

[0046] In this embodiment, the first unlocking member 41 has a second elongated hole 414 on its lower side, and a connecting shaft 120 passes through the first connecting seat 12, the second elongated hole 414, and the second connecting seat 31 to connect the three. Furthermore, the first unlocking member 41 also has a third elongated hole 415, through which another connecting shaft passes to connect with the rear support 1. Thus, through these two connections, the smooth vertical movement of the first unlocking member 41 is ensured and it is not easily misaligned. In other embodiments, the first unlocking member 41 can also be connected to the rear support 1 at any other suitable position via a connecting shaft, allowing for relative vertical movement. The rear side of the second linkage member 72 and the second connecting seat 31 are coaxially pivotally connected to the rear support 1 via the connecting shaft 120.

[0047] In this embodiment, the second connecting seat 31 is provided with a second receiving groove 311 on the side facing the first connecting seat 12. The locking mechanism includes a locking member 51 that is movably connected between the first receiving groove 121 and the second receiving groove 311, and a second elastic member 52 (not shown) disposed between the locking member 51 and the second connecting seat 31 that can drive the locking member 51 to move toward the rear bracket 1. The outer ring of the locking member facing the back is provided with a tooth 511, and a first inclined surface 512 is provided on the side facing the rear bracket 1. The lower side of the first unlocking member 41 facing the first inclined surface 512 is provided with a cooperating second inclined surface 413. The opposite sides of the first receiving groove 121 and the tooth 511 are respectively provided with meshing parts. The first end face ratchet tooth 122 and the second end face ratchet tooth 513 are configured as a tooth groove. When the stroller is in the unfolded state, under the action of the second elastic member, the tooth groove (i.e., the second receiving groove 311) meshes with the teeth, and the first end face ratchet tooth 122 and the second end face ratchet tooth 513 mesh, thereby locking the mechanism in a locked state, and the backrest cannot rotate relative to the rear support 1. When the first unlocking member 41 is driven to move downward, through the cooperation of the first inclined surface 512 and the second inclined surface 413, the locking member is driven to move towards the backrest 3. When it moves to the point where the first end face ratchet tooth 122 and the second end face ratchet tooth 513 disengage, the locking mechanism unlocks, and the backrest 3 can rotate relative to the rear support 1. Under the action of gravity, the backrest 3 will rotate directly downward until it abuts against the rear support 1 and can no longer rotate (e.g., Figure 11 As shown in Figure 12, the backrest 3 is rotated to the folded state. That is to say, when folding the stroller, the locking mechanism of the seat backrest 3 can be unlocked in conjunction with the backrest 3, without having to unlock the locking mechanism separately to fold the backrest 3, thus making the folding operation of the stroller of this utility model even simpler.

[0048] The second elastic element 52 can be configured as a compression spring, located within the second receiving groove 311, with one side abutting against the wall of the second receiving groove 311 and the other side abutting against the locking element. Under the action of the second elastic element 52, the locking element 51 maintains a tendency to move in the direction of the rear bracket 1.

[0049] A frame locking mechanism is also provided between the upper support 2 and the rear support 1 to restrict their relative rotation. After unlocking the frame locking mechanism, the upper support 2 can be rotated backward and downward to fold up the stroller of this utility model. The specific structure and unlocking method of the frame locking mechanism can be any feasible structure, as it is not the inventive point of this utility model, and therefore will not be described in detail here.

[0050] The backrest 3 is also provided with a second unlocking device for unlocking the locking mechanism. The second unlocking device includes an operating member 32 movably connected to the backrest 3 and a linkage structure (not shown) connected to the operating member 32 on the upper side. The lower side of the linkage structure is connected to the locking member 51, which drives the operating member 32 to move relative to the backrest 3. The linkage structure can pull the locking member 51 to move away from the rear support 1, thereby disengaging the first end face ratchet tooth 122 from the second end face ratchet tooth 513, thus unlocking the locking mechanism.

[0051] Specifically, in this embodiment, the linkage structure can be a steel wire, which passes through the second receiving groove 311 and then through the third receiving groove 513 to connect with the locking member 51.

[0052] With the stroller in the unfolded state, to adjust the angle of the backrest 3, rotate the operating component 32, thereby pulling the upper side of the steel cable upwards. This pulls the lower side of the steel cable, causing the locking component 51 to move away from the rear support 1, disengaging the second end face ratchet tooth 513 from the first end face ratchet tooth 122, thus unlocking the locking mechanism. The backrest 3 can then rotate relative to the rear support 1. At this point, the backrest 3 can be rotated back and forth. When the desired angle is reached, release the operating component 32. Under the action of the second elastic component 52, the locking component 51 moves towards the rear support 1, and the second end face ratchet tooth 513 of the locking component 51 re-engages with the first end face ratchet tooth 122, locking the backrest 3 at that angle. This separate adjustment of the backrest angle does not affect the first unlocking component 41, thus preventing the stroller from folding.

[0053] The first end-face ratchet tooth 122 and the second end-face ratchet tooth 513 are configured such that when they are engaged, the backrest 3 can rotate forward without driving the second unlocking device to unlock the locking mechanism, while rotating the backrest backward requires first driving the second unlocking device to unlock the locking mechanism. Thus, this invention fully utilizes the characteristics of the end-face ratchet teeth, making the backrest angle adjustment operation simpler.

[0054] Preferably, the outer ring of the locking member 51 facing the rear support 1 has a full circle of inclined surface, which is set as the first inclined surface 512. So no matter what angle the backrest 3 is adjusted to, it contacts the second inclined surface 413 on the lower side of the first unlocking member 41. That is, no matter what angle the backrest 3 is rotated to, the unlocking device can be linked to unlock the locking mechanism when the stroller is folded up.

[0055] The specific structure of the operating component 32, its connection with the backrest 3, the steel wire, and the connection between the lower side of the steel wire and the locking component 51 can all be any known and feasible structure, and are not the inventive point of this utility model, so they will not be described in detail here.

[0056] Preferably, the rear support 1 is provided with a first limiting member 14, and the outer side of the second connecting seat 31 is provided with a second limiting member 312 protruding towards the rear support 1. When the backrest 3 rotates forward to a set angle, the first limiting member 14 and the second limiting member 312 abut against each other, thus preventing the backrest 3 from rotating forward any further. This arrangement ensures that the seat backrest 3 will not rotate forward beyond the set angle position, thereby preventing accidental operation during backrest 3 angle adjustment that could crush a child sitting on the seat, thus further ensuring the child's safety. The set angle can be set according to relevant safety regulations and special requirements.

[0057] The front support 6 is provided with a front wheel 60 at its lower front part, and the rear support 1 is provided with a rear wheel 10 at its lower rear part.

[0058] In this embodiment, the upper support 2 includes a push handle 23 and a connecting tube 24. The push handle 23 and the connecting tube 24 are pivotally connected to the lower side of the rear support 1, and the push handle 23 can rotate between forward and backward positions (not shown). The drive groove is disposed on the lower side of the connecting tube 24. The upper side of the first linkage 71 is pivotally connected to the connecting tube 24. When the push handle 23 is in the rearward position, it can rotate backward and downward together with the connecting tube 24 to retract.

[0059] In other embodiments, the upper bracket 2 may not be provided with a connecting pipe 24, but may be directly provided with a push handle 23, and the push handle may not be reversed. The first linkage rod 71 is pivotally connected to the push handle 23, and the drive groove is also provided on the push handle 23.

[0060] Those skilled in the art should understand that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. As described above, the front wheel 60 is in the front, the rear wheel 10 is in the rear, the upper support 2 is in the upper, the front wheel 60 and the rear wheel 10 are in the lower, and the relative positions of the rear support 1 and the seat back 3 are left and right, respectively. The above description is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to 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.

Claims

1. A stroller that can be switched between an unfolded state and a folded state, the stroller comprising a frame and a seat connected to the frame, the seat comprising a seating portion, characterized in that: The frame includes a rear support, an upper support, a front support, an armrest, a first linkage, a second linkage, and a third linkage. The lower side of the upper support is pivotally connected to the rear side of the front support at different positions on the rear support, or the lower side of the upper support and the rear side of the front support are coaxially pivotally connected to the rear support. The rear side of the armrest is pivotally connected to the rear support, or the rear side of the armrest is coaxially pivotally connected to the lower side of the upper support on the rear support. The upper side of the first linkage is pivotally connected to the upper support. The rear side of the second linkage is pivotally connected to the rear support. The front side of the second linkage, the lower side of the first linkage, and the seating area are coaxially pivotally connected, or two of them are pivotally connected, and the third linkage is pivotally connected to either of the other two. One side of the third linkage is pivotally connected to the first linkage, and the other side is pivotally connected to the armrest.

2. The stroller according to claim 1, characterized in that: The lower side of the upper support is pivotally connected to the rear support around a pivot a first pivot or pivotally connected to the rear support coaxially with the front support around a pivot a second pivot. The upper side of the first linkage is pivotally connected to the upper support around a pivot a second pivot. When the frame is in the unfolded state, the pivot a first pivot is located below the pivot a second pivot.

3. The stroller according to claim 2, characterized in that: The lower side of the first linkage is pivotally connected to the seating part and / or the second linkage around the third pivot. When the frame is in the unfolded state, the pivot position with the first linkage is located between the second and third pivots.

4. The stroller according to any one of claims 1 to 3, characterized in that: The front side of the third linkage component is pivotally connected to the armrest around the pivot four. When the frame is in the unfolded state, the pivot four is located in front of the pivot position between the armrest and the rear support or the position where the lower side of the armrest and the upper support are pivotally connected to the rear support on the same axis.

5. The stroller according to claim 4, characterized in that: When the frame is in the unfolded state, the pivot position of the seating part with the lower side of the first connecting member and / or the front side of the second linkage member is located behind the pivot position of the seating part with the front support.

6. The stroller according to claim 5, characterized in that: The frame also includes a pivot seat, with the front side of the rear support fixedly connected to the pivot seat, and the lower side of the upper support pivotally connected to the rear side of the armrest and the rear side of the front foot.

7. The stroller according to claim 6, characterized in that: The lower side of the upper support and the rear side of the handrail are coaxially pivotally connected to the pivot seat.

8. The stroller according to claim 7, characterized in that: The lower side of the upper support and the rear side of the handrail are coaxially pivotally connected to the upper side of the pivot seat, and the rear side of the front support is pivotally connected to the lower front side of the pivot seat.

9. The stroller according to any one of claims 1 to 3, 5 to 7, characterized in that: The seat also includes a backrest, the lower side of which is pivotally connected to a rear support, and a locking mechanism is provided between the backrest and the rear support to restrict their relative rotation; the stroller also includes a first unlocking member that is movably connected to the rear support and a second unlocking member that is movably connected to the pivot seat; the upper side of the first unlocking member cooperates with the second unlocking member, and the lower side cooperates with the locking mechanism; the upper side of the second unlocking member cooperates with the upper support; when the stroller is folded up, the rotating upper support can drive the second unlocking member to move downward, and the downward-moving second unlocking member will drive the first unlocking member to move downward to unlock the locking mechanism, thereby allowing the backrest to rotate relative to the rear support.

10. The stroller according to claim 9, characterized in that: A first elastic element is provided between the first unlocking element and the rear bracket, which can drive the first unlocking element to move upward.

11. The stroller according to claim 9, characterized in that: The upper support has a drive groove on the side facing the second unlocking member. When the stroller is in the unfolded state, the upper side of the second unlocking member extends into the drive groove. At least one side wall of the drive groove and / or at least one side of the upper side of the second unlocking member is set as an inclined surface.

12. The stroller according to claim 11, characterized in that: The upper side of the first unlocking member and / or the lower side of the second unlocking member are set as slopes.

13. The stroller according to claim 9, characterized in that: The rear support is provided with a first connecting seat, and the lower back is provided with a second connecting seat, the first connecting seat and the second connecting seat are pivotally connected; the locking mechanism is provided between the first connecting seat and the second connecting seat.

14. The stroller according to claim 10, 11, or 12, characterized in that: The rear support is provided with a first connecting seat, and the lower back is provided with a second connecting seat, the first connecting seat and the second connecting seat are pivotally connected; the locking mechanism is provided between the first connecting seat and the second connecting seat.

15. The stroller according to claim 9, characterized in that: The rear side of the second linkage component is coaxially pivotally connected to the lower back side of the rear bracket.

16. The stroller according to any one of claims 10 to 13, characterized in that: The rear side of the second linkage component is coaxially pivotally connected to the lower back side of the rear bracket.

17. The stroller according to claim 14, characterized in that: The rear side of the second linkage component is coaxially pivotally connected to the lower back side of the rear bracket.

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