Folding frames and strollers

Abstract

This utility model discloses a folding frame and a children's vehicle, relating to the field of children's vehicles. Key technical features include a front wheel mechanism, a rear wheel mechanism rotatably connected to the front wheel mechanism, a lower push rod rotatably connected to the rear wheel mechanism, an upper push rod rotatably connected to the lower push rod, and a linkage assembly disposed between the front wheel mechanism, the rear wheel mechanism, and the lower push rod. A first locking component is disposed between the upper push rod and the lower push rod, and a second locking component is disposed between the linkage assembly and the lower push rod. A folding unlock switch cooperating with the first locking component is disposed on the upper push rod; after rotation, the upper push rod unlocks the second locking component via the first locking component. This utility model employs a dual-locking assembly with linkage control, requiring unlocking and initiation of a folding action before the frame automatically folds, thereby improving the frame's safety and stability in the unfolded state.

Description

Technical Field

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

[0002] The existing Chinese patent with authorization announcement number CN217198315U discloses a gravity-driven automatic folding stroller frame. Its automatic folding principle is as follows: when the electric bell unlocking device is unlocked, the upper push rod assembly and the lower push rod assembly are released from lock. Due to gravity, the lower push rod assembly rotates downward, driving the upper push rod assembly to rotate, and continuously driving the entire frame to fold.

[0003] However, the frame in the aforementioned patent is only locked by the electric bell unlocking device. If a child accidentally unlocks the electric bell while riding, the frame will automatically fold, which may affect the child's safety. Utility Model Content

[0004] In view of the shortcomings of the existing technology, one of the objectives of this utility model is to provide a folding frame that adopts a dual locking component with linkage control. The frame will only fold automatically after unlocking and initiating the folding action, thereby improving the safety of the frame and the stability of the frame when unfolded.

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

[0006] A folding frame includes a front wheel mechanism, a rear wheel mechanism rotatably connected to the front wheel mechanism, a lower push rod rotatably connected to the rear wheel mechanism, an upper push rod rotatably connected to the lower push rod, and a linkage assembly disposed between the front wheel mechanism, the rear wheel mechanism, and the lower push rod.

[0007] A first locking component is provided between the upper push rod and the lower push rod, and a second locking component is provided between the connecting rod assembly and the lower push rod;

[0008] The upper push rod is equipped with a folding unlock switch that cooperates with the first locking component. After the upper push rod is rotated, it unlocks the second locking component through the first locking component.

[0009] Furthermore, the first locking component unlocks the second locking component via a first pull cable;

[0010] After the first locking component is unlocked by the folding unlock switch, the upper push rod is controlled to rotate. After the upper push rod rotates, it unlocks the second locking component through the first locking component and the first cable. Then, under the gravity of the upper push rod and the lower push rod, the linkage assembly, the front wheel mechanism and the rear wheel mechanism are folded.

[0011] Furthermore, the linkage assembly includes a sliding sleeve sleeved on the lower push rod, and a first link rotatably connected to the sliding sleeve;

[0012] The second locking component is located between the lower push rod and the sliding sleeve.

[0013] Furthermore, the second locking assembly includes a fixed seat embedded in the lower push rod, and a locking plate and a movable seat disposed in the fixed seat; the sliding sleeve has a locking hole that cooperates with the locking plate, and the first cable is connected to the movable seat;

[0014] The first cable drives the movable seat to move, and the movable seat drives the lock plate to move until it disengages from the lock hole, thereby unlocking the device.

[0015] Furthermore, the movable seat moves along the length of the lower push rod, and the moving direction of the locking plate is perpendicular to the moving direction of the movable seat.

[0016] Furthermore, a drive shaft passes through between the movable seat and the locking plate, and the movable seat is provided with a drive groove that cooperates with the drive shaft.

[0017] 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.

[0018] 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;

[0019] 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.

[0020] 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.

[0021] 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. The cable positioning block is connected to the first cable. A driving boss that cooperates with the cable positioning block is provided in the first tooth groove.

[0022] 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.

[0023] Furthermore, the end of the first link away from the sliding sleeve is rotatably connected to the rear wheel mechanism; the link assembly also includes a second link rotatably connected to the front wheel mechanism, a third link rotatably connected to the rear wheel mechanism, and a fourth link rotatably connected between the first link and the third link; the second link and the third link are rotatably connected.

[0024] Another objective of this invention is to provide a stroller that includes the aforementioned folding frame.

[0025] In summary, this utility model has the following beneficial effects:

[0026] 1. After unlocking the first locking component via the folding unlock switch, a folding action must be initiated by pushing the upper lever to unlock the second locking component, thereby activating the automatic folding of the frame. This can prevent frame folding caused by accidental operation and improve safety.

[0027] 2. When the frame is in the unfolded state, the second locking component can further improve the stability of the frame on the basis of the support of the linkage assembly;

[0028] 3. The first locking component and the second locking component form a linkage control, so only one folding unlock switch is set, which makes operation convenient and optimizes the user experience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the folding frame in the unfolded state in Example 1. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the folding frame in the unfolded state in Example 1. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the folding frame in the folded state in Example 1;

[0032] Figure 4 This is a schematic diagram of the structure of the first locking component in Embodiment 1. Figure 1 ;

[0033] Figure 5 This is a schematic diagram of the structure of the first locking component in Embodiment 1. Figure 2 ;

[0034] Figure 6 This is a schematic diagram of the structure of the second locking component in Embodiment 1. Figure 1 ;

[0035] Figure 7 This is a schematic diagram of the structure of the second locking component in Embodiment 1. Figure 2 ;

[0036] Figure 8 This is a schematic diagram of the structure of the second locking component in Embodiment 1. Figure 3 .

[0037] In the diagram: 1. Front wheel mechanism; 2. Rear wheel mechanism; 3. Lower push rod; 4. Upper push rod; 51. Sliding sleeve; 511. Locking hole; 52. First connecting rod; 53. Second connecting rod; 54. Third connecting rod; 55. Fourth connecting rod; 6. First locking assembly; 61. Rotating part; 611. First tooth groove; 612. Drive boss; 613. Sloping panel; 62. Base; 621. Second tooth groove; 63. Limiting tooth; 64. Rotating push block; 651. Positioning ring; 652. Cable positioning block; 7. Folding unlocking switch; 81. Fixed seat; 82. Locking plate; 83. Movable seat; 84. Drive sloping groove. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings.

[0039] 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 1:

[0040] A folding frame, see reference Figures 1 to 8 It includes a front wheel mechanism 1, a rear wheel mechanism 2 rotatably connected to the front wheel mechanism 1, two lower push rods 3 rotatably connected to the rear wheel mechanism 2, upper push rods 4 rotatably connected to the two lower push rods 3 respectively, and a linkage assembly disposed between the front wheel mechanism 1, the rear wheel mechanism 2 and the lower push rods 3; wherein, when the frame is in the unfolded state, the linkage assembly plays a supporting role, and when the frame is folded, the linkage assembly plays a linkage role.

[0041] Reference Figures 1 to 8 In this embodiment, a first locking component 6 is provided between the upper push rod 4 and the lower push rod 3, and a second locking component is provided between the connecting rod assembly and the lower push rod 3; a folding unlocking switch 7 that cooperates with the first locking component 6 is provided on the upper push rod 4, and the first locking component 6 unlocks the second locking component through a first pull cable located inside the lower push rod 3.

[0042] Reference Figures 1 to 8 After the first locking component 6 is unlocked by the folding unlocking switch 7, the upper push rod 4 is controlled to rotate counterclockwise. After the upper push rod 4 rotates, it unlocks the second locking component through the first locking component 6 and the first cable. Then, under the gravity of the upper push rod 4 and the lower push rod 3, it rotates downward clockwise and drives the linkage assembly, the front wheel mechanism 1 and the rear wheel mechanism 2 to fold.

[0043] Reference Figures 1 to 8 After the first locking component 6 is unlocked by the folding unlock switch 7, the folding action must be initiated by pushing the upper lever 4 to unlock the second locking component, thereby starting the automatic folding of the frame. This can avoid frame folding caused by accidental operation and improve safety. When the frame is unfolded, the second locking component can also improve the stability of the frame on the basis of the support of the linkage assembly. The first locking component 6 and the second locking component form a linkage control, so only one folding unlock switch 7 is required, which can facilitate operation and optimize the user experience.

[0044] Reference Figures 1 to 8 Specifically, in this embodiment, the linkage assembly includes a sliding sleeve 51 sleeved on the lower push rod 3, and a first connecting rod 52 rotatably connected to the sliding sleeve 51; wherein, the end of the first connecting rod 52 away from the sliding sleeve 51 is rotatably connected to the rear wheel mechanism 2; the linkage assembly also includes a second connecting rod 53 rotatably connected to the front wheel mechanism 1, a third connecting rod 54 rotatably connected to the rear wheel mechanism 2, and a fourth connecting rod 55 rotatably connected between the first connecting rod 52 and the third connecting rod 54; the second connecting rod 53 and the third connecting rod 54 are rotatably connected.

[0045] Reference Figures 1 to 8 Specifically, in this embodiment, the first locking component includes a rotating part 61 connected to the upper push rod 4, a base 62 connected to the lower push rod 3, and a limiting tooth 63 disposed between the rotating part 61 and the base 62; the rotating part 61 and the base 62 are respectively provided with a first tooth groove 611 and a second tooth groove 621 that cooperate with the limiting tooth 63; the rotating part 61 is provided with a rotating push block 64 that contacts the limiting tooth 63; the limiting tooth 63 includes a locked state that is simultaneously embedded in the first tooth groove 611 and the second tooth groove 621, and an unlocked state that is only embedded in the second tooth groove 621; a second pull cable is provided between the folding unlock switch 7 and the rotating push block 64, and the folding unlock switch 7 applies a pulling force to the second pull cable, which can drive the rotating push block 64 to rotate; the rotating push block 64 moves axially while rotating, and drives the limiting tooth 63 to move, so that the limiting tooth 63 switches from the locked state to the unlocked state, then the rotating part 61 can rotate, and the upper push rod 4 can also rotate, thereby starting the folding.

[0046] Reference Figures 1 to 8 Specifically, in this embodiment, the rotating part 61 is provided with an inclined plate 613, and the rotating push block 64 is provided with an inclined surface that cooperates with the inclined plate 613; through the inclined surface, the rotating push block 64 can move axially while rotating.

[0047] Reference Figures 1 to 8A positioning ring 651 is provided inside the base 62. A cable positioning block 652 extending axially into the first toothed groove 611 is provided on the positioning ring 651. One end of the first cable is connected to the cable positioning block 652. A driving boss 612 cooperating with the cable positioning block 652 is provided in the first toothed groove 611. The driving boss 612 rotates with the rotating part 61 and the upper push rod 4. When the driving boss 612 rotates to contact the cable positioning block 652 and drives the cable positioning block 652 to rotate, the cable positioning block 652 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, realizing linkage control.

[0048] Reference Figures 1 to 8 In this embodiment, the second locking component is disposed between the lower push rod 3 and the sliding sleeve 51. When locked by the second locking component, the sliding sleeve 51 cannot move relative to the lower push rod 3. After the second locking component unlocks the sliding sleeve 51, the sliding sleeve 51 can move along the lower push rod 3, thereby achieving folding.

[0049] Reference Figures 1 to 8 Specifically, the second locking assembly includes a fixed seat 81 disposed within the lower push rod 3, a locking plate 82 disposed within the fixed seat 81, and a movable seat 83 disposed within the fixed seat 81; a drive shaft passes through the movable seat 83 and the locking plate 82, and a drive groove 84 that cooperates with the drive shaft is provided on the movable seat 83; thus, the movable seat 83 can move along the length direction of the lower push rod 3, and the moving direction of the locking plate 82 is perpendicular to the moving direction of the movable seat 83.

[0050] Reference Figures 1 to 8 One end of the first cable is connected to the cable positioning block 652, and the other end is connected to the movable seat 83. The sliding sleeve 51 is provided with a lock hole 511 that cooperates with the locking plate 82. The locking plate 82 passes through the lower push rod 3 and is embedded in the lock hole 511 to achieve locking. The cable positioning block 652 applies a pulling force to the first cable, and the first cable drives the movable seat 83 to move relative to the fixed seat 81. The driving groove 84 on the movable seat 83 drives the locking plate 82 to move away from the lock hole 511 until it is disengaged from the lock hole 511 to achieve unlocking.

[0051] Reference Figures 1 to 8 The first locking assembly also includes a return spring acting on the limiting tooth 63, and the second locking assembly also includes return springs acting on the movable seat 83 respectively; the return springs are used to achieve automatic locking of the frame after it is unfolded. Example 2:

[0052] A type of stroller, reference Figures 1 to 8 It includes the folding frame in Example 1.

Claims

1. A folding bicycle frame, characterized in that: It includes a front wheel mechanism, a rear wheel mechanism rotatably connected to the front wheel mechanism, a lower push rod rotatably connected to the rear wheel mechanism, an upper push rod rotatably connected to the lower push rod, and a linkage assembly disposed between the front wheel mechanism, the rear wheel mechanism, and the lower push rod; A first locking component is provided between the upper push rod and the lower push rod, and a second locking component is provided between the connecting rod assembly and the lower push rod; The upper push rod is equipped with a folding unlock switch that cooperates with the first locking component. After the upper push rod is rotated, it unlocks the second locking component through the first locking component.

2. The folding frame according to claim 1, characterized in that: The first locking component unlocks the second locking component via a first pull cable; After the first locking component is unlocked by the folding unlock switch, the upper push rod is controlled to rotate. After the upper push rod rotates, it unlocks the second locking component through the first locking component and the first cable. Then, under the gravity of the upper push rod and the lower push rod, the linkage assembly, the front wheel mechanism and the rear wheel mechanism are folded.

3. The folding frame according to claim 2, characterized in that: The linkage assembly includes a sliding sleeve sleeved on the lower push rod, and a first link rotatably connected to the sliding sleeve; The second locking component is located between the lower push rod and the sliding sleeve.

4. The folding frame according to claim 3, characterized in that: The second locking assembly includes a fixed seat embedded in the lower push rod, and a locking plate and a movable seat disposed in the fixed seat; the sliding sleeve has a locking hole that mates with the locking plate, and the first cable is connected to the movable seat; The first cable drives the movable seat to move, and the movable seat drives the lock plate to move until it disengages from the lock hole, thereby unlocking the device.

5. The folding frame according to claim 4, characterized in that: The movable seat moves along the length of the lower push rod, and the locking plate moves perpendicular to the moving direction of the movable seat.

6. The folding frame according to claim 5, characterized in that: A drive shaft passes through the movable seat and the locking plate, and a drive groove that cooperates with the drive shaft is provided on the movable seat.

7. The folding frame according to claim 2, 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.

8. The folding frame according to claim 7, 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. The cable positioning block is connected to the first cable. 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.

9. The folding frame according to claim 3, characterized in that: The end of the first link away from the sliding sleeve is rotatably connected to the rear wheel mechanism; the link assembly also includes a second link rotatably connected to the front wheel mechanism, a third link rotatably connected to the rear wheel mechanism, and a fourth link rotatably connected between the first link and the third link; the second link and the third link are rotatably connected.

10. A children's stroller, characterized in that: The folding frame includes any one of claims 1-9.

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