Folding baby carriage

Abstract

The utility model discloses a folding baby carriage, and relates to the field of baby carriages. According to the technical scheme, the device comprises a base, a front wheel mechanism, a rear wheel mechanism, a push rod assembly and a supporting assembly; the front wheel mechanism is rotationally connected with the front end of the base, and the rear wheel mechanism is rotationally connected with the rear end of the base; the supporting assembly is rotationally connected with the front end of the base, the push rod assembly is rotationally connected with the rear end of the base, and the supporting assembly is rotationally connected with the push rod assembly; a first connecting plate is arranged between the supporting assembly and the front wheel mechanism, and a second connecting plate is arranged between the push rod assembly and the rear wheel mechanism. The front wheel mechanism and the rear wheel mechanism are both folded in a rotating mode, so that the lasting stability of folding can be improved, the first locking assembly is unlocked through the folding unlocking switch, the second locking assembly is automatically unlocked in the folding process, automatic folding is achieved under the action of gravity, and the folding efficiency is improved. And the user experience is optimized.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicles, and more specifically, to a folding children's vehicle. Background Technology

[0002] A Chinese patent with publication number CN111483504A discloses a children's stroller, which includes a stroller frame having an unfolded state and a folded state, a front wheel assembly, a rear wheel assembly, and a locking mechanism; the stroller frame includes a base frame, a connecting frame, a front support, a push rod assembly, and a linkage assembly; when the stroller frame is in the folded state, the push rod assembly and the front support are folded up above the base frame, the connecting frame rotates relative to the front support and the front frame, causing the front wheel assembly to flip backward and fold up with the base frame, the base frame shortens in the front-rear direction, causing the rear wheel assembly to move forward and reduce the distance between it and the front wheel assembly.

[0003] However, using a sliding and telescopic base frame to move the rear wheel assembly can easily lead to jamming or excessive resistance after prolonged use, which in turn affects the folding of the frame and makes it difficult to achieve automatic folding of the frame. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a folding stroller in which both the front and rear wheel mechanisms fold by rotation, thereby improving the stability of the folding process. Furthermore, the first locking component is unlocked by a folding unlock switch, and the second locking component is automatically unlocked during the folding process, thus achieving automatic folding under the action of gravity and optimizing the user experience.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A folding stroller includes a base, a front wheel mechanism, a rear wheel mechanism, a push rod assembly, and a support assembly; the front wheel mechanism is rotatably connected to the front end of the base, and the rear wheel mechanism is rotatably connected to the rear end of the base.

[0007] The support assembly is rotatably connected to the front end of the base, the push rod assembly is rotatably connected to the rear end of the base, and the support assembly and the push rod assembly are rotatably connected.

[0008] A first connecting plate is provided between the support assembly and the front wheel mechanism, and a second connecting plate is provided between the push rod assembly and the rear wheel mechanism;

[0009] During folding, the push rod assembly drives the support assembly to fold, and then the support assembly drives the front wheel mechanism to fold through the first connecting plate, while the push rod assembly drives the rear wheel mechanism to fold through the second connecting plate.

[0010] Furthermore, the push rod assembly is provided with a first locking component and a folding unlocking switch that cooperates with the first locking component;

[0011] A second locking component is provided between the support component and the push rod component, and a first cable is provided between the first locking component and the second locking component;

[0012] After the first locking component is unlocked by the folding unlock switch, the push rod component is folded. When the push rod component is folded, the second locking component is unlocked by the first pull cable, which then drives the support component to fold.

[0013] Furthermore, the push rod assembly includes an upper push rod, a middle push rod rotatably connected to the upper push rod, and a lower push rod rotatably connected to the middle push rod;

[0014] The first locking component is disposed between the upper push rod and the middle push rod, and the second locking component is disposed between the support component and the lower push rod;

[0015] After the first locking component is unlocked by the folding unlock switch, the upper push rod is rotated to fold the upper and middle push rods. After the upper push rod rotates, the second locking component is unlocked by the first cable. Then, the folded upper and middle push rods continue to rotate under the action of gravity to achieve folding with the lower push rod, and drive the support component to fold.

[0016] Furthermore, the support assembly includes a first support rod, a support frame, and a second support rod; one end of the first support rod is rotatably connected to the central push rod, and the other end is rotatably connected to the support frame; one end of the second support rod is rotatably connected to the support frame, and the other end is rotatably connected to the front end of the base.

[0017] One end of the first connecting plate is rotatably connected to the front wheel mechanism, and the other end is rotatably connected to the second support rod;

[0018] A support pivot is provided between the support frame and the lower push rod, and the second locking component is provided between the lower push rod and the support frame.

[0019] Furthermore, in the unfolded state, the middle push rod and the lower push rod are arranged in a V-shape; the lower push rod is rotatably connected to the rear end of the base, and one end of the second connecting plate is rotatably connected to the lower push rod, while the other end is rotatably connected to the rear wheel mechanism.

[0020] Furthermore, the first locking assembly includes a rotating part connected to the upper push rod, a base connected to the middle push rod, and a limiting tooth disposed between the rotating part and the base; the rotating part and the base are respectively provided with a first tooth groove and a second tooth groove that cooperate with the limiting tooth.

[0021] The rotating part is provided with a rotating push block that contacts the limiting teeth; a second pull cable is provided between the folding unlock switch and the rotating push block;

[0022] The limiting tooth includes a locked state that is simultaneously embedded in the first tooth groove and the second tooth groove, and an unlocked state that is embedded in the second tooth groove.

[0023] The folding unlock switch drives the rotating push block to rotate via the second pull cable. While rotating, the rotating push block moves axially and drives the limiting teeth to move, so that the limiting teeth switch from the locked state to the unlocked state, and the rotating part can rotate.

[0024] Furthermore, a positioning ring is provided inside the base, and a cable positioning block is provided on the positioning ring extending axially into the first tooth groove. One end of the first cable is connected to the cable positioning block. A driving boss that cooperates with the cable positioning block is provided in the first tooth groove.

[0025] The drive boss rotates with the rotating part. When the drive boss rotates to contact the cable positioning block and drives the cable positioning block to rotate, the cable positioning block unlocks through the first cable controlling the second locking component.

[0026] Furthermore, the second locking component includes a fixed seat disposed within the lower push rod, and a locking rod and an unlocking block disposed within the fixed seat. The unlocking block is connected to the first cable. The locking rod passes through the lower push rod and is embedded into the lock hole of the support frame to achieve locking. The first cable drives the unlocking block to move relative to the fixed seat, and the driving inclined surface on the unlocking block drives the locking rod to move away from the lock hole to achieve unlocking.

[0027] Furthermore, the stroller also includes a seat bracket rotatably connected to the central push rod, and a third connecting plate is provided between the seat bracket and the support frame.

[0028] Furthermore, the support frame is provided with a positioning seat, which is provided with a shaft hole that mates with the support shaft and a locking hole that mates with the locking rod.

[0029] In summary, this utility model has the following beneficial effects:

[0030] 1. Both the front and rear wheel mechanisms fold by rotation, which improves the stability of the folding process and helps to further optimize the size after folding, making it easier to carry and store. The push rod assembly drives the rear wheel mechanism to fold, and the support assembly drives the front wheel mechanism to fold. This cross-arrangement structure helps to optimize the force transmission path during folding and improves the stability of the stroller when it is unfolded.

[0031] 2. In the unfolded state, the push rod assembly is kept in the unfolded state by the first locking component, and the push rod assembly, support assembly, front wheel mechanism and rear wheel mechanism are kept in the unfolded state by the second locking component; the setting of the first locking component and the second locking component not only improves the stability of the stroller in the unfolded state, but also has a simple and ingenious arrangement.

[0032] 3. The first locking component is unlocked by the folding unlock switch, and the second locking component is automatically unlocked during the folding process, thereby achieving automatic folding under the action of gravity and optimizing the user experience. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the unfolded structure of the folding stroller in the embodiment. Figure 1 ;

[0034] Figure 2 This is a partial structural diagram of the folding stroller in the embodiment;

[0035] Figure 3 This is a schematic diagram of the unfolded structure of the folding stroller in the embodiment. Figure 2 ;

[0036] Figure 4 This is a schematic diagram of the folding stroller in the folded state in the embodiment;

[0037] Figure 5 This is a schematic diagram of the structure of the first locking component in the embodiment. Figure 1 ;

[0038] Figure 6 This is a schematic diagram of the structure of the first locking component in the embodiment. Figure 2 :

[0039] Figure 7 This is a schematic diagram of the structure of the second locking component in the embodiment. Figure 1 ;

[0040] Figure 8 This is a schematic diagram of the structure of the second locking component in the embodiment. Figure 2 ;

[0041] Figure 9 This is a schematic diagram of the structure of the second locking component in the embodiment. Figure 3 ;

[0042] Figure 10 This is a schematic diagram of the structure of the second locking component in the embodiment. Figure 4 .

[0043] In the diagram: 1. Base; 2. Front wheel mechanism; 3. Rear wheel mechanism; 41. Upper push rod; 42. Middle push rod; 43. Lower push rod; 431. Support shaft; 51. First support rod; 52. Support frame; 53. Second support rod; 54. Positioning seat; 541. Shaft hole; 542. Lock hole; 61. First connecting plate; 62. Second connecting plate; 63. Third connecting plate; 7. Seat bracket; 8. Folding unlocking switch; 91. Rotating part; 911. First tooth groove; 912. Drive boss; 913. Slanted panel; 92. Base; 921. Second tooth groove; 93. Limiting tooth; 94. Rotating push block; 951. Positioning ring; 952. Cable positioning block; 96. Fixed seat; 97. Locking rod; 98. Unlocking block. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to the accompanying drawings.

[0045] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law. Example

[0046] A folding stroller, see reference Figures 1 to 10 It includes a base 1, a front wheel mechanism 2, a rear wheel mechanism 3, a push rod assembly, and a support assembly; the front wheel mechanism 2 is rotatably connected to the front end of the base 1, and the rear wheel mechanism 3 is rotatably connected to the rear end of the base 1; the support assembly is rotatably connected to the front end of the base 1, and the push rod assembly is rotatably connected to the rear end of the base 1, and the support assembly and the push rod assembly are rotatably connected; a first connecting plate 61 is provided between the support assembly and the front wheel mechanism 2, and a second connecting plate 62 is provided between the push rod assembly and the rear wheel mechanism 3; during folding, the push rod assembly drives the support assembly to fold, and then the support assembly drives the front wheel mechanism 2 to fold through the first connecting plate 61, and the push rod assembly drives the rear wheel mechanism 3 to fold through the second connecting plate 62.

[0047] Reference Figures 1 to 10 In this embodiment, both the front wheel mechanism 2 and the rear wheel mechanism 3 are folded by rotation, which can improve the long-term stability of folding and is conducive to further optimizing the size after folding, making it easier to carry and store after folding. The push rod assembly drives the rear wheel mechanism 3 to fold, and the support assembly drives the front wheel mechanism 2 to fold. This cross arrangement structure is conducive to optimizing the force transmission path during folding and can improve the stability of the stroller when unfolded.

[0048] Reference Figures 1 to 10Specifically, in this embodiment, the push rod assembly includes an upper push rod 41, a middle push rod 42 rotatably connected to the upper push rod 41, and a lower push rod 43 rotatably connected to the middle push rod 42; wherein, the upper push rod 41, the middle push rod 42, and the lower push rod 43 are all U-shaped; when the push rod assembly is in the unfolded state, the upper push rod 41 and the middle push rod 42 are arranged in a flat arrangement, and the middle push rod 42 and the lower push rod 43 are arranged in a V-shape; that is, when the push rod assembly is in the unfolded state, the entire push rod assembly is arranged in a V-shape; this enables the push rod assembly to be rotatably connected to the rear end of the base 1, and also improves the stability of the push rod assembly.

[0049] Reference Figures 1 to 10 The lower push rod 43 is rotatably connected to the rear end of the base 1, and one end of the second connecting plate 62 is rotatably connected to the lower push rod 43, and the other end is rotatably connected to the rear wheel mechanism 3; there are two second connecting plates 62.

[0050] Reference Figures 1 to 10 In this embodiment, the support assembly includes two first support rods 51, a U-shaped support frame 52, and two second support rods 53. One end of the first support rod 51 is rotatably connected to the middle push rod 42, and the other end is rotatably connected to the support frame 52. One end of the second support rod 53 is sleeved on the support frame 52, achieving a rotatable connection with the support frame 52, and the other end is rotatably connected to the front end of the base 1. There are two first connecting plates 61. One end of the first connecting plate 61 is rotatably connected to the front wheel mechanism 2, and the other end is rotatably connected to the second support rod 53. A positioning seat 54 is sleeved on the support frame 52, and a support shaft 431 is provided on the lower push rod 43. The positioning seat 54 is provided with a shaft hole 541 that mates with the support shaft 431. Thus, two rotatable connections are formed between the push rod assembly and the support assembly. The first is the rotatable connection between the first support rod 51 and the middle push rod 42, and the second is the rotatable connection between the support frame 52 and the lower push rod 43.

[0051] Reference Figures 1 to 10 When unfolded, the middle push rod 42, the lower push rod 43, the first support rod 51, and the support frame 52 form a four-bar linkage structure, while the lower push rod 43, the base 1, the support frame 52, and the second support rod 53 form a triangular support structure. This improves the stability of the stroller when unfolded. Moreover, the cross arrangement of the push rod assembly and the support assembly facilitates the automatic folding of the stroller and the smoothness of the folding.

[0052] Reference Figures 1 to 10In this embodiment, the stroller is also equipped with a seat bracket 7; the seat bracket 7 is U-shaped, and the two free ends of the seat bracket 7 are sleeved on the central push rod 42 to realize the rotatable connection between the seat bracket 7 and the central push rod 42; two third connecting plates 63 are also provided between the seat bracket 7 and the support frame 52; one end of the third connecting plate 63 is rotatably connected to the central push rod 42, and the other end is rotatably connected to the support frame 52; thus, when the push rod assembly and the support assembly are folded, they can also drive the seat bracket 7 to fold.

[0053] Reference Figures 1 to 10 In this embodiment, a first locking component is provided between the upper push rod 41 and the middle push rod 42, and a folding unlocking switch 8 is provided on the upper push rod 41; the folding unlocking switch 8 is connected to the first locking component through a second pull cable, thereby controlling the first locking component to unlock; a second locking component is provided between the lower push rod 43 and the support frame 52, and a first pull cable is provided between the first locking component and the second locking component; that is, the first locking component serves as the unlocking switch for the second locking component.

[0054] Reference Figures 1 to 10 When in the unfolded state, the push rod assembly is kept in the unfolded state by the first locking component, and the push rod assembly, support assembly, front wheel mechanism 2 and rear wheel mechanism 3 are kept in the unfolded state by the second locking component. The setting of the first locking component and the second locking component can not only improve the stability of the stroller in the unfolded state, but also has a simple and ingenious arrangement.

[0055] Reference Figures 1 to 10 After the first locking component is unlocked by the folding unlock switch 8 and the second cable, the operator can control the upper push rod 41 to rotate counterclockwise to fold the upper push rod 41 and the middle push rod 42. After the upper push rod 41 rotates, the second locking component is unlocked by the first cable. Then, the folded upper push rod 41 and the middle push rod 42 continue to rotate clockwise under the action of gravity to achieve folding with the lower push rod 43, and continue to drive the support component to fold. The support frame 52 drives the seat bracket 7 to fold through the third connecting plate 63. The second support rod 53 drives the front wheel mechanism 2 to rotate counterclockwise through the first connecting plate 61 to fold. The lower push rod 43 drives the rear wheel mechanism 3 to rotate clockwise through the second connecting plate 62 to fold.

[0056] Reference Figures 1 to 10 In this embodiment, the first locking component is unlocked by the folding unlock switch 8, and the second locking component is automatically unlocked during the folding process, thereby achieving automatic folding under the action of gravity and optimizing the user experience.

[0057] Reference Figures 1 to 10Specifically, in this embodiment, the first locking assembly includes a rotating part 91 connected to the upper push rod 41, a base 92 connected to the middle push rod 42, and a limiting tooth 93 disposed between the rotating part 91 and the base 92; the rotating part 91 and the base 92 are respectively provided with a first tooth groove 911 and a second tooth groove 921 that cooperate with the limiting tooth 93; the rotating part 91 is provided with a rotating push block 94 that contacts the limiting tooth 93; the limiting tooth 93 includes a locking form that is simultaneously embedded in the first tooth groove 911 and the second tooth groove 921. The second cable has two states: a locked state and an unlocked state, which is only embedded in the second tooth groove 921; one end of the second cable is connected to the folding unlock switch 8, and the second end is connected to the rotating push block 94; the folding unlock switch 8 applies a pulling force to the second cable, which can drive the rotating push block 94 to rotate; the rotating push block 94 moves axially while rotating, and drives the limiting tooth 93 to move, so that the limiting tooth 93 switches from the locked state to the unlocked state, then the rotating part 91 can rotate, and the upper push rod 41 can also rotate, thereby starting to fold.

[0058] Reference Figures 1 to 10 Specifically, in this embodiment, the rotating part 91 is provided with an inclined plate 913, and the rotating push block 94 is provided with an inclined surface that cooperates with the inclined plate 913; through the inclined surface, the rotating push block 94 can move axially while rotating.

[0059] Reference Figures 1 to 10 A positioning ring 951 is provided inside the base 92. A cable positioning block 952 extending axially into the first toothed groove 911 is provided on the positioning ring 951. One end of the first cable is connected to the cable positioning block 952. A driving boss 912 that cooperates with the cable positioning block 952 is provided inside the first toothed groove 911. The driving boss 912 rotates with the rotating part 91 and the upper push rod 41. When the driving boss 912 rotates to contact the cable positioning block 952 and drives the cable positioning block 952 to rotate, the cable positioning block 952 applies a pulling force to the first cable. Then the first cable controls the second locking component to unlock. Therefore, the first locking component is equivalent to the unlocking switch of the second locking component.

[0060] Reference Figures 1 to 10 Specifically, the second locking assembly includes a fixed base 96 disposed within the lower push rod 43, and a locking rod 97 and an unlocking block 98 disposed within the fixed base 96; one end of the first pull cable is connected to the pull cable positioning block 952, and the other end is connected to the unlocking block 98; the positioning base 54 is also provided with a lock hole 542; the locking rod 97 passes through the lower push rod 43 and is embedded in the lock hole 542 to achieve locking; the pull cable positioning block 952 applies a pulling force to the first pull cable, the first pull cable drives the unlocking block 98 to move relative to the fixed base 96, and the driving inclined surface on the unlocking block 98 drives the locking rod 97 to move in a direction away from the lock hole 542 to achieve unlocking.

[0061] Reference Figures 1 to 10The first locking component also includes a return spring acting on the limiting tooth 93, and the second locking component also includes return springs acting on the locking rod 97 and the unlocking block 98 respectively; the return springs enable the stroller to automatically lock after being unfolded.

Claims

1. A folding stroller, characterized in that: It includes a base, a front wheel mechanism, a rear wheel mechanism, a push rod assembly, and a support assembly; the front wheel mechanism is rotatably connected to the front end of the base, and the rear wheel mechanism is rotatably connected to the rear end of the base; The support assembly is rotatably connected to the front end of the base, the push rod assembly is rotatably connected to the rear end of the base, and the support assembly and the push rod assembly are rotatably connected. A first connecting plate is provided between the support assembly and the front wheel mechanism, and a second connecting plate is provided between the push rod assembly and the rear wheel mechanism; During folding, the push rod assembly drives the support assembly to fold, and then the support assembly drives the front wheel mechanism to fold through the first connecting plate, while the push rod assembly drives the rear wheel mechanism to fold through the second connecting plate.

2. The folding stroller according to claim 1, characterized in that: The push rod assembly is provided with a first locking component and a folding unlocking switch that cooperates with the first locking component; A second locking component is provided between the support component and the push rod component, and a first cable is provided between the first locking component and the second locking component; After the first locking component is unlocked by the folding unlock switch, the push rod component is folded. When the push rod component is folded, the second locking component is unlocked by the first pull cable, which then drives the support component to fold.

3. The folding stroller according to claim 2, characterized in that: The push rod assembly includes an upper push rod, a middle push rod rotatably connected to the upper push rod, and a lower push rod rotatably connected to the middle push rod. The first locking component is disposed between the upper push rod and the middle push rod, and the second locking component is disposed between the support component and the lower push rod; After the first locking component is unlocked by the folding unlock switch, the upper push rod is rotated to fold the upper and middle push rods. After the upper push rod rotates, the second locking component is unlocked by the first cable. Then, the folded upper and middle push rods continue to rotate under the action of gravity to achieve folding with the lower push rod, and drive the support component to fold.

4. The folding stroller according to claim 3, characterized in that: The support assembly includes a first support rod, a support frame, and a second support rod; one end of the first support rod is rotatably connected to the central push rod, and the other end is rotatably connected to the support frame; one end of the second support rod is rotatably connected to the support frame, and the other end is rotatably connected to the front end of the base. One end of the first connecting plate is rotatably connected to the front wheel mechanism, and the other end is rotatably connected to the second support rod; A support pivot is provided between the support frame and the lower push rod, and the second locking component is provided between the lower push rod and the support frame.

5. The folding stroller according to claim 3, characterized in that: In the unfolded state, the middle push rod and the lower push rod are arranged in a V-shape; the lower push rod is rotatably connected to the rear end of the base, and one end of the second connecting plate is rotatably connected to the lower push rod, while the other end is rotatably connected to the rear wheel mechanism.

6. The folding stroller according to claim 3, characterized in that: The first locking assembly includes a rotating part connected to the upper push rod, a base connected to the middle push rod, and a limiting tooth disposed between the rotating part and the base; the rotating part and the base are respectively provided with a first tooth groove and a second tooth groove that cooperate with the limiting tooth. The rotating part is provided with a rotating push block that contacts the limiting teeth; a second pull cable is provided between the folding unlock switch and the rotating push block; The limiting tooth includes a locked state that is simultaneously embedded in the first tooth groove and the second tooth groove, and an unlocked state that is embedded in the second tooth groove. The folding unlock switch drives the rotating push block to rotate via the second pull cable. While rotating, the rotating push block moves axially and drives the limiting teeth to move, so that the limiting teeth switch from the locked state to the unlocked state, and the rotating part can rotate.

7. The folding stroller according to claim 6, characterized in that: A positioning ring is provided inside the base, and a cable positioning block is provided on the positioning ring, extending axially into the first tooth groove. One end of the first cable is connected to the cable positioning block. A driving boss that cooperates with the cable positioning block is provided in the first tooth groove. The drive boss rotates with the rotating part. When the drive boss rotates to contact the cable positioning block and drives the cable positioning block to rotate, the cable positioning block unlocks through the first cable controlling the second locking component.

8. The folding stroller according to claim 4, characterized in that: The second locking component includes a fixed base disposed within the lower push rod, and a locking rod and an unlocking block disposed within the fixed base. The unlocking block is connected to a first cable. The locking rod passes through the lower push rod and is embedded into the lock hole of the support frame to achieve locking. The first cable drives the unlocking block to move relative to the fixed base, and the driving inclined surface on the unlocking block drives the locking rod to move away from the lock hole to achieve unlocking.

9. The folding stroller according to claim 4, characterized in that: The stroller also includes a seat bracket that is rotatably connected to the central push rod, and a third connecting plate is provided between the seat bracket and the support frame.

10. The folding stroller according to claim 4, characterized in that: The support frame is provided with a positioning seat, and the positioning seat is provided with a shaft hole that cooperates with the support shaft and a locking hole that cooperates with the locking rod.

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