A foldable stroller

Abstract

This invention relates to the field of stroller technology and discloses a foldable stroller, comprising: a handle assembly including a first rod and a second rod, with a first slot and a second slot respectively provided on the first rod and the second rod; a frame assembly rotatably connected to the second rod, the frame assembly including a seat, a rear support rod, and a front support rod connected in sequence, the front support rod having a locking groove; a first locking mechanism including an unlocking button, a first pull cable, a first driving member, and a first locking member arranged in sequence, the first driving member driving the first locking member to disengage from the first slot to unlock the first rod; and a second locking mechanism including a second driving member, a second pull cable, and a second locking member connected in sequence, the first rod driving the second driving member to move and locking it in the locking groove; the second pull cable driving the second locking member to disengage from the locking groove. The advantages of this invention are that the foldable stroller achieves overall locking and unlocking, with stable locking, linked unlocking, and easy folding.

Description

Technical Field

[0001] This invention relates to the field of stroller technology, and more particularly to a foldable stroller. Background Technology

[0002] With the improvement of living standards, strollers have become an essential tool for babies. Placing infants in strollers and having adults push them not only greatly facilitates the caregiving of adults but also makes the baby more comfortable and safer. However, most baby strollers on the market are usually quite complicated, and most are not foldable, making them inconvenient to store and move.

[0003] Existing folding trolleys typically require manual pulling (or pushing) of individual components such as the handle tube, front leg tube, rear leg tube, and seat frame tube to fold. This manual operation is time-consuming, labor-intensive, and cumbersome, causing inconvenience to users with limited dexterity. The folding of the trolley is achieved through various linkages, resulting in a complex structure with many parts, leading to a large weight and making it inconvenient to move. Furthermore, the locking mechanism of each component is unstable when in use, posing a safety hazard. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a foldable trolley that is easy to fold and can be folded without linkage.

[0005] The technical solution adopted by this invention to solve its technical problem is to propose a foldable trolley, comprising:

[0006] A handle assembly, the handle assembly including a first rod and a second rod that are rotatably connected, and the first rod and the second rod are respectively provided with a first slot and a second slot;

[0007] A frame assembly is rotatably connected to the second rod. The frame assembly includes a seat, a rear support rod, and a front support rod that are rotatably connected in sequence. The front support rod is provided with a locking groove.

[0008] The first locking mechanism includes an unlocking button, a first cable, a first driving member, and a first locking member arranged in sequence. The first locking member is movably held between the first slot and the second slot. The first driving member can drive the first locking member to disengage from the first slot to unlock the first rod.

[0009] The second locking mechanism includes a second driving member, a second cable, and a second locking member connected in sequence. The second driving member is movably disposed on the handle assembly. The first rod can drive the second driving member to move. The second locking member is movably disposed on the seat pocket and can be locked in the locking groove. The second cable can drive the second locking member to disengage from the locking groove.

[0010] Furthermore, the first rod and the second rod are respectively provided with a first connecting part and a second connecting part, one of the first connecting part and the second connecting part is provided with a connecting shaft, and the other of the two is provided with a connecting hole. The connecting shaft is rotatably disposed on the connecting shaft; and the first slot and the second slot are arranged along the length direction of the connecting shaft, and the first locking member is movably sleeved on the connecting shaft.

[0011] Furthermore, the first driving member is sleeved on the connecting shaft, and the first connecting part is provided with an abutment block around the connecting shaft in the circumferential direction. The abutment block is provided with a first driving inclined surface, and the first driving member is provided with a second driving inclined surface. The second driving inclined surface can slide along the first driving inclined surface.

[0012] Furthermore, one end of the first cable is connected to the unlock button, and the other end of the first cable is connected to the first drive member; the outer wall of the first drive member is provided with a placement groove and a third slot communicating with the placement groove, the first cable has a connector head, the connector head is locked in the third slot, and one end of the first cable is accommodated in the placement groove.

[0013] Furthermore, the first locking mechanism also includes a first elastic element, which is sleeved on the connecting shaft, with one end of the first elastic element abutting against the first locking element and the other end of the first elastic element abutting against the second connecting portion.

[0014] Furthermore, the first locking element is a first gear, and the thickness of the first gear is greater than the depth of the first slot.

[0015] Furthermore, the first connecting part is provided with a drive groove, and one end of the second drive member is disposed in the drive groove.

[0016] Furthermore, the second locking member is disposed at the bottom of the seat pocket, the second rod is hollow, the second locking member is provided with a fourth slot, one end of the second cable is connected to the second driving member, and the other end of the second cable passes through the second rod and is engaged in the fourth slot.

[0017] Furthermore, there are two second locking members, which are respectively disposed at both ends of the seat pocket; the second locking mechanism includes a second elastic member, one end of which abuts against the seat pocket and the other end of which abuts against the second locking member.

[0018] Furthermore, a second gear is provided on the seat, a third gear is fixedly provided on the rear support rod, a fourth gear is provided on the second rod, and a fifth gear is provided on the front support rod; the second gear meshes with the third gear, and the fourth gear meshes with the fifth gear.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In this invention, the foldable trolley is equipped with a first locking mechanism and a second locking mechanism on the handle assembly and the frame assembly, respectively. During normal use, the first locking mechanism and the second locking mechanism ensure the stability of the entire vehicle structure and prevent the trolley from folding automatically. The first locking mechanism locks the first rod and the second rod, and the second locking mechanism locks the seat, the rear support rod and the front support rod.

[0021] In this invention, when the trolley needs to be folded, simply press the unlock button on the first rod. The first cable, driven by the unlock button, drives the first driving component to rotate, thereby causing the first locking component to disengage from the first slot on the first rod. Thus, the first rod can rotate relative to the second rod to fold. When the first rod rotates, it can drive the second driving component to move, thereby driving the second locking component to disengage from the locking slot via the second cable, thus unlocking the seat. Simultaneously, the second rod, seat, front support rod, and rear support rod rotate under the cooperation of various gears, realizing the folding of the entire vehicle. There are no complex linkage mechanisms, and the frame is simple and lightweight. In other words, the trolley of this solution can unlock the first and second locking components by simply pressing the unlock button and rotating the first rod. The unlocking method is simple and easy to operate. Moreover, the trolley is easy to store and transport after folding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the foldable trolley of the present invention;

[0023] Figure 2 for Figure 1 Another structural diagram from another perspective;

[0024] Figure 3 for Figure 1 Exploded view;

[0025] Figure 4 This is a structural schematic diagram of the handle assembly and the first locking mechanism;

[0026] Figure 5 A schematic diagram of the connection between the seat pocket and the front support rod (the second locking element is locked in the locking groove);

[0027] Figure 6 A schematic diagram of the connection between the seat pocket and the front support rod (the second locking element is disengaged from the locking groove);

[0028] Figure 7 This is a sectional view of the frame assembly structure.

[0029] Figure 8 This is a cross-sectional view of the structure connecting the first and second rods;

[0030] Figure 9 for Figure 1 Side view;

[0031] Figure 10 This is a schematic diagram of the foldable trolley of the present invention in its folded state.

[0032] Figure 11 This is a schematic diagram of the foldable trolley of the present invention in its second folded state;

[0033] Figure 12 This is a schematic diagram of the foldable trolley of the present invention in its folded state three.

[0034] In the picture:

[0035] 100. Handlebar assembly; 110. First rod; 111. First slot; 112. First connecting part; 113. Connecting hole; 114. Abutment block; 115. Drive slot; 120. Second rod; 121. Second slot; 122. Second connecting part; 123. Connecting shaft; 124. Fourth gear; 200. Frame assembly; 210. Seat; 211. Second gear; 220. Rear support rod; 221. Third gear; 23. 0. Front support rod; 231. Locking groove; 232. Fifth gear; 300. First locking mechanism; 310. Unlocking button; 320. First cable; 330. First driving member; 331. Placement groove; 332. Third slot; 340. First locking member; 350. First elastic member; 400. Second locking mechanism; 410. Second driving member; 420. Second cable; 430. Second locking member; 440. Second elastic member. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0037] like Figures 1-6As shown, a foldable stroller includes: a handle assembly 100, which includes a first rod 110 and a second rod 120 rotatably connected, and the first rod 110 and the second rod 120 are respectively provided with a first slot 111 and a second slot 121; a frame assembly 200, rotatably connected to the second rod 120, which includes a seat 210, a rear support rod 220 and a front support rod 230 rotatably connected in sequence, and the front support rod 230 is provided with a locking groove 231; and a first locking mechanism 300, which includes an unlocking button 310, a first cable 320, a first drive member 330 and a first locking member 340 arranged in sequence. A locking member 340 is movably held between a first slot 111 and a second slot 121. A first driving member 330 can drive the first locking member 340 to disengage from the first slot 111 to unlock the first lever 110. A second locking mechanism 400 includes a second driving member 410, a second cable 420, and a second locking member 430 connected in sequence. The second driving member 410 is movably disposed on the handle assembly 100. The first lever 110 can drive the second driving member 410 to move. The second locking member 430 is movably disposed on the seat pocket 210 and can be locked in the lock groove 231. The second cable 420 can drive the second locking member 430 to disengage from the lock groove 231.

[0038] Specifically, the foldable trolley has a first locking mechanism 300 and a second locking mechanism 400 respectively set on the handle assembly 100 and the frame assembly 200. Pressing the unlock button 310 can unlock and rotate the first rod 110, thereby driving the second locking member 430 to disengage from the locking groove 231, thus realizing the linkage folding of the whole vehicle. There is no need to manually fold the components of the trolley, making the operation convenient.

[0039] The first rod 110 and the second rod 120 are respectively provided with a first connecting part 112 and a second connecting part 122. One of the first connecting part 112 and the second connecting part 122 is provided with a connecting shaft 123, and the other of the two is provided with a connecting hole 113. The connecting shaft 123 is rotatably mounted on the connecting shaft 123. The first slot 111 and the second slot 121 are arranged along the length direction of the connecting shaft 123, and the first locking member 340 is movably sleeved on the connecting shaft 123. In actual use, the first rod 110 and the second rod 120 are connected by the first connecting part 112 and the second connecting part 122, and the connecting shaft 123 is set on the second connecting part 122 to realize the rotatable connection between the first rod 110 and the second rod 120; and the first locking member 340 is the first gear, the teeth of the first locking member 340 can be engaged in the first slot 111 and the second slot 121. The thickness of the first gear is greater than the depth of the first slot 111, that is, to ensure that the first gear is always engaged in the second slot 121. The locking or unlocking of the first rod 110 is realized by changing the position of the first locking member 340 on the connecting shaft 123, and the overall structure is stable.

[0040] like Figure 3 and Figure 4 As shown, the first driving member 330 is sleeved on the connecting shaft 123, and the first connecting part 112 is provided with an abutment block 114 around the connecting shaft 123. The abutment block 114 is provided with a first driving inclined surface, and the first driving member 330 is provided with a second driving inclined surface. The second driving inclined surface can slide along the first driving inclined surface. One end of the first pull cable 320 is connected to the unlock button 310, and the other end of the first pull cable 320 is connected to the first driving member 330. The outer wall of the first driving member 330 is provided with a placement groove 331 and a third slot 332 connected to the placement groove 331. The first pull cable 320 has a connector head, which is locked in the third slot 332, and one end of the first pull cable 320 is accommodated in the placement groove 331. That is, after pressing the unlock button 310, the first driving member 330 is rotated by pulling the first pull cable 320 around the first driving member 330. Then, with the cooperation of the first driving inclined surface and the second driving inclined surface, the first driving member 330 squeezes the first locking member 340 to move away from the first connecting part 112, thereby completely disengaging from the first slot 111 and unlocking the first rod 110.

[0041] In actual use, the first locking mechanism 300 also includes a first elastic element 350, which is sleeved on the connecting shaft 123. One end of the first elastic element 350 abuts against the first locking element 340, and the other end of the first elastic element 350 abuts against the second connecting part 122. The first elastic element 350 is a compression spring, which makes the first locking element 340 always tend to move closer to the first connecting part 112. After the trolley is folded up and the unlocking button 310 is released, the first locking element 340 can be locked again in the first slot 111, ensuring that the trolley can be locked after folding up.

[0042] like Figure 3 and Figure 8 As shown, the first connecting part 112 is provided with a drive groove 115, and one end of the second driving member 410 is disposed in the drive groove 115; that is, the second driving member 410 is disposed at the connection between the first connecting part 112 and the second connecting part 122. When the first rod 110 rotates and the groove wall at one end of the drive groove 115 abuts against the second driving member 410, the second driving member 410 can be driven to move, thereby pulling the second cable 420.

[0043] like Figure 5 and Figure 6As shown, the second locking member 430 is disposed at the bottom of the seat pocket 210, the second rod 120 is hollow, the second locking member 430 is provided with a fourth slot, one end of the second pull cable 420 is connected to the second driving member 410, and the other end of the second pull cable 420 passes through the second rod 120 and is engaged in the fourth slot; specifically, there are two second locking members 430, which are respectively disposed at both ends of the seat pocket 210; the second locking mechanism 400 includes a second elastic member 440, one end of the second elastic member 440 abuts against the seat pocket 210, and the other end abuts against the second locking member 430. By pulling the second locking member 430 out of the locking slot 231 through the second pull cable 420, the seat pocket 210 can be rotated, and the second elastic member 440 gives the second locking member 430 a tendency to move towards the locking slot 231.

[0044] like Figure 3 and Figure 7 As shown, the seat 210 is equipped with a second gear 211, the rear support rod 220 is fixedly equipped with a third gear 221, the second rod 120 is equipped with a fourth gear 124, and the front support rod 230 is equipped with a fifth gear 232; the second gear 211 meshes with the third gear 221, and the fourth gear 124 meshes with the fifth gear 232. That is, the seat 210 is rotatably mounted on the rear support rod 220, and one end of the seat 210 is connected to the second rod 120 through the second gear 211. When the second rod 120 rotates, it can drive the seat 210 to move closer to the second rod 120, and the front support rod 230 to move closer to the rear support rod 220.

[0045] The folding process of this folding cart is as follows: when the cart is in the unfolded state (e.g.) Figure 9 (As shown), pressing the unlock button 310 causes the first cable 320 to move upward, pulling the first drive member 330 and causing it to rotate. This, in turn, causes the first drive member 330 to press the first locking member 340 out of the first slot 111, thus unlocking the first lever 110. Then, rotating the first lever 110 clockwise until... Figure 10 In the indicated state, the first lever 110 drives the second driving member 410 to move counterclockwise in the driving groove 115, thereby pulling the second cable 420 to move. The second cable 420 then drives the second locking member 430 to disengage from the locking groove 231 (as shown). Figure 11 As shown), with the cooperation of each gear, the front support rod 230 of the seat 210 makes circular motion around its respective rotation point until the frame is fully retracted (as shown). Figure 12 (As shown).

[0046] In this design, the folding trolley can be stored and unfolded. During normal use, the stability of the trolley's overall structure can be ensured by the first locking component 340 and the second locking component 430, preventing potential safety hazards. When not in use, the trolley can be folded up to save space. To fold it up, simply press the unlock button 310 and then rotate the first rod 110 and the second rod 120 in sequence to complete the overall folding. The operation is simple, and the folding is smooth and effortless due to the gear engagement.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0048] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A foldable trolley, characterized in that, Including: A handle assembly, the handle assembly including a first rod and a second rod that are rotatably connected, and the first rod and the second rod are respectively provided with a first slot and a second slot; A frame assembly is rotatably connected to the second rod. The frame assembly includes a seat, a rear support rod, and a front support rod that are rotatably connected in sequence. The front support rod is provided with a locking groove. The first locking mechanism includes an unlocking button, a first cable, a first driving member, and a first locking member arranged in sequence. The first locking member is movably held between the first slot and the second slot. The first driving member can drive the first locking member to disengage from the first slot to unlock the first rod. The second locking mechanism includes a second driving member, a second cable, and a second locking member connected in sequence. The second driving member is movably mounted on the handle assembly. The first rod can drive the second driving member to move. The second locking member is movably mounted on the seat pocket and can be locked in the locking groove. The second cable can drive the second locking member to disengage from the locking groove. The seat is equipped with a second gear, the rear support rod is fixedly equipped with a third gear, the second rod is equipped with a fourth gear, and the front support rod is equipped with a fifth gear; the second gear meshes with the third gear, and the fourth gear meshes with the fifth gear.

2. The foldable trolley according to claim 1, characterized in that, The first rod and the second rod are respectively provided with a first connecting part and a second connecting part. One of the first connecting part and the second connecting part is provided with a connecting shaft, and the other of the two is provided with a connecting hole. The connecting shaft is rotatably disposed in the connecting hole. The first slot and the second slot are arranged along the length direction of the connecting shaft, and the first locking member is movably sleeved on the connecting shaft.

3. A foldable trolley according to claim 2, characterized in that, The first driving component is sleeved on the connecting shaft, and the first connecting part is provided with an abutment block around the connecting shaft in the circumferential direction. The abutment block is provided with a first driving inclined surface, and the first driving component is provided with a second driving inclined surface. The second driving inclined surface can slide along the first driving inclined surface.

4. A foldable trolley according to claim 3, characterized in that, One end of the first cable is connected to the unlock button, and the other end of the first cable is connected to the first drive member; the outer wall of the first drive member is provided with a placement groove and a third slot communicating with the placement groove; the first cable has a connector head, the connector head is locked in the third slot, and one end of the first cable is accommodated in the placement groove.

5. A foldable trolley according to claim 2, characterized in that, The first locking mechanism further includes a first elastic element, which is sleeved on the connecting shaft, with one end of the first elastic element abutting against the first locking element and the other end of the first elastic element abutting against the second connecting portion.

6. A foldable trolley according to claim 1, characterized in that, The first locking element is a first gear, and the thickness of the first gear is greater than the depth of the first slot.

7. A foldable trolley according to claim 2, characterized in that, The first connecting part is provided with a drive groove, and one end of the second drive member is disposed in the drive groove.

8. A foldable trolley according to claim 1, characterized in that, The second locking member is located at the bottom of the seat pocket, the second rod is hollow, the second locking member is provided with a fourth slot, one end of the second cable is connected to the second driving member, and the other end of the second cable passes through the second rod and is engaged in the fourth slot.

9. A foldable trolley according to claim 1, characterized in that, There are two second locking members, which are respectively located at both ends of the seat pocket; the second locking mechanism includes a second elastic member, one end of which abuts against the seat pocket and the other end of which abuts against the second locking member.

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