Folding frame and stroller

Abstract

The utility model discloses a folding type vehicle frame and children's pushchair, and it relates to the technical field of baby carriage. Its technical scheme main points include front support, with the front wheel mechanism of front support rotary connection, with the rear support of front support rotary connection, with the rear wheel mechanism of rear support connection and with the upper support of front support rotary connection, still include the linkage mechanism of front wheel mechanism connection, when the upper support is relative to the front support and rotates and folds, through linkage mechanism and drive front wheel mechanism relative to the front support and rotate and fold. The utility model discloses through linkage mechanism can realize the automatic folding of front wheel mechanism and rear support, thereby can simplify the operation, optimize user experience, and the volume of the front wheel mechanism after folding can optimize the volume of vehicle frame after folding, and the storage is convenient.

Description

Technical Field

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

[0002] A Chinese patent with authorization announcement number CN223456989U discloses an automatically folding child stroller, which includes a frame unit and a foldable child seat. The frame unit includes a push rod assembly, a front support assembly, a rear support assembly, and a frame folding linkage assembly. The front support assembly has a front wheel at its bottom, and the rear support assembly has a rear wheel at its bottom.

[0003] The stroller in the aforementioned patent can be folded to reduce its size, but the wheels cannot be folded, so there is still room for further optimization of the folded size. Utility Model Content

[0004] To address the shortcomings of existing technologies, one of the objectives of this utility model is to provide a folding frame that can automatically fold the front wheel mechanism and the rear support through a linkage mechanism, thereby simplifying operation, optimizing user experience, and optimizing the size of the folded frame after the front wheel mechanism is folded, making it convenient for storage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A folding frame includes a front support, a front wheel mechanism rotatably connected to the front support, a rear support rotatably connected to the front support, a rear wheel mechanism connected to the rear support, and an upper support rotatably connected to the front support. It also includes a linkage mechanism connected to the front wheel mechanism; When the upper bracket rotates and folds relative to the front bracket, the linkage mechanism drives the front wheel mechanism to rotate and fold relative to the front bracket.

[0006] Furthermore, the linkage mechanism includes a first driving member and a linkage assembly rotatably connected to the first driving member and the front wheel mechanism respectively; the first driving member is used to receive the driving force from the upper support.

[0007] Furthermore, the linkage assembly includes a first link rotatably connected to the first drive member; when the frame is in the deployed state, the angle between the front support and the first link is less than or equal to 15°.

[0008] Furthermore, the linkage assembly also includes a second linkage rotatably connected to the front wheel mechanism; the first linkage and the second linkage are fixedly connected.

[0009] Furthermore, the first driving member is fixedly connected to the upper bracket; or, the first driving member is rotatably connected to the front bracket, and the upper bracket is provided with a driving surface that can rotate to contact the first driving member.

[0010] Furthermore, the linkage mechanism further includes a first driven member rotatably connected to the first driving member and the linkage assembly respectively, and the first driven member is rotatably connected to the rear support; or, the linkage mechanism further includes a second driving member fixedly connected to the first driving member, and a second driven member fixedly disposed on the rear support; the second driving member engages with the second driven member and transmits driving force.

[0011] Furthermore, the front wheel mechanism includes a front wheel axle rotatably connected to the front support, and an extension arm rotatably connected to the second link is provided on the front wheel axle.

[0012] Furthermore, when the upper bracket rotates and folds relative to the front bracket, the linkage mechanism drives the front wheel mechanism to rotate and fold relative to the front bracket, and the linkage mechanism also drives the rear bracket to rotate and fold relative to the front bracket.

[0013] To achieve the above objectives, this utility model also provides the following technical solution: A folding frame includes a front support, a front wheel mechanism rotatably connected to the front support, a rear support rotatably connected to the front support, a rear wheel mechanism connected to the rear support, and an upper support rotatably connected to the rear support. It also includes a linkage mechanism connected to the front wheel mechanism; When the upper bracket rotates and folds relative to the rear bracket, the linkage mechanism drives the front wheel mechanism to rotate and fold relative to the front bracket.

[0014] Another objective of this invention is to provide a children's stroller that includes the aforementioned folding frame.

[0015] In summary, this utility model has the following beneficial effects: 1. The use of a linkage mechanism enables the automatic folding of the front wheel mechanism and the rear support, thereby simplifying operation, optimizing user experience, and optimizing the size of the frame after folding, making it easier to store. 2. The first driving component and the linkage assembly form the first linkage path, and the second driving component and the second driven component form the second linkage path. The two linkage paths are independent of each other, which simplifies the structure and reduces the probability of linkage mechanism failure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the folding frame structure in Example 1; Figure 2This is a schematic diagram of the folding frame in the unfolded state in Example 1; Figure 3 This is a structural schematic diagram of the folding frame in Example 1 during the folding process; Figure 4 This is a schematic diagram of the folding frame in the folded state in Example 1; Figure 5 This is a schematic diagram of the folding joint and linkage mechanism in Example 1. Figure 1 ; Figure 6 This is a schematic diagram of the folding joint and linkage mechanism in Example 1. Figure 2 ; Figure 7 This is a schematic diagram of the folding frame in Example 2.

[0017] In the diagram: 1. Front support; 2. Rear support; 3. Upper support; 4. Front wheel mechanism; 41. Front wheel axle; 42. Extension arm; 5. Rear wheel mechanism; 6. Folding joint; 61. Joint base; 611. Shaft tube; 62. First joint; 621. First driving surface; 622. Second driving surface; 63. Second joint; 71. First driving member; 711. Shaft hole; 72. First driven member; 73. First connecting rod; 74. Second connecting rod; 81. Second driving member; 82. Second driven member. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] 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:

[0020] A folding frame, see reference Figures 1 to 6 It includes a front support 1, a rear support 2, an upper support 3, a front wheel mechanism 4, a rear wheel mechanism 5, a folding joint 6, and a linkage mechanism; specifically, the front support 1, the rear support 2, and the upper support 3 are respectively connected to the folding joint 6 to realize the rotational connection between the upper support 3 and the front support 1, and the rotational connection between the rear support 2 and the front support 1; the front wheel mechanism 4 is rotatably connected to the bottom of the front support 1, and the rear wheel mechanism 5 is connected to the bottom of the rear support 2.

[0021] Reference Figures 1 to 6Specifically, the folding joint 6 includes a joint base 61, a first joint 62, and a second joint 63. The joint base 61 is fixedly connected to the front support 1, the first joint 62 is fixedly connected to the upper support 3, and the second joint 63 is fixedly connected to the rear support 2. The first joint 62 is rotatably connected to the joint base 61, thereby achieving a rotatable connection between the upper support 3 and the front support 1. The rear support 2 is rotatably connected to the joint base 61, thereby achieving a rotatable connection between the rear support 2 and the front support 1. In addition, a locking mechanism is provided inside the folding joint 6, and a corresponding unlocking mechanism is provided on the upper support 3. When the upper support 3 is folded, the locking mechanism inside the folding joint 6 is unlocked, allowing the upper support 3 to rotate relative to the front support 1. The unlocking mechanism and the locking mechanism are existing technologies and will not be described in detail here.

[0022] Reference Figures 1 to 6 Specifically, in this embodiment, the linkage mechanism is connected to the front support 1, the front wheel mechanism 4, and the rear support 2 respectively, and receives the driving force from the upper support 3. When the upper support 3 rotates and folds relative to the front support 1, the linkage mechanism drives the front wheel mechanism 4 to rotate and fold relative to the front support 1, and the linkage mechanism also drives the rear support 2 to rotate and fold relative to the front support 1. That is, in this embodiment, the linkage mechanism can realize the automatic folding of the front wheel mechanism 4 and the rear support 2, thereby simplifying the operation, optimizing the user experience, and the folded front wheel mechanism 4 can optimize the volume of the frame after folding, making it convenient for storage.

[0023] Reference Figures 1 to 6 Preferably, in this embodiment, the two front wheels of the front wheel mechanism 4 are omnidirectional wheels; rotating the folded front wheels to be perpendicular to the rear wheels of the rear wheel mechanism 5 can further optimize the volume of the frame after folding and facilitate storage.

[0024] Reference Figures 1 to 6 Specifically, in this embodiment, the linkage mechanism includes a first driving member 71, a first driven member 72, and a linkage assembly. The linkage assembly includes a first connecting rod 73 and a second connecting rod 74. The first driving member 71 is rotatably connected to the joint base 61. Specifically, a shaft tube 611 is provided inside the joint base 61, and a shaft hole 711 that mates with the shaft tube 611 is provided on the first driving member 71. The first driving member 71 is sleeved on the shaft tube 611 through the shaft hole 711 and can rotate around the shaft tube 611. One end of the first driven member 72 is rotatably connected to the first driving member 71, and the other end is rotatably connected to the first connecting rod 73. Furthermore, the middle position of the first driven member 72 is rotatably connected to the second joint 63. The first connecting rod 73 is fixedly connected to the second connecting rod 74, and the second connecting rod 74 is rotatably connected to the front wheel mechanism 4.

[0025] Reference Figures 1 to 6The first joint 62 is provided with a driving surface that can rotate to contact the first driving member 71; that is, the driving surface contacts the first driving member 71 to transmit driving force, so that the first driving member 71 rotates; specifically, the end face of the first joint 62 is provided with an arc-shaped protrusion, and the two ends of the arc-shaped protrusion form the first driving surface 621 and the second driving surface 622 respectively, and a clearance stroke is formed between the first driving surface 621 and the second driving surface 622.

[0026] Reference Figures 1 to 6 The upper bracket 3 is folded by rotating it downwards in a counterclockwise direction. When the first driving surface 621 rotates to contact the first driving member 71, the upper bracket 3 continues to rotate and drives the first driving member 71 to rotate in a counterclockwise direction. After the first driving member 71 rotates, it drives the front wheel mechanism 4 to rotate in a counterclockwise direction through the first driven member 72 and the linkage assembly. It also drives the rear bracket 2 to rotate in a clockwise direction through the first driven member 72, thereby realizing the folding of the frame.

[0027] Reference Figures 1 to 6 When unfolded, the upper bracket 3 is rotated upwards clockwise. When the second driving surface 622 rotates to contact the first driving member 71, the upper bracket 3 continues to rotate, driving the first driving member 71 to rotate clockwise. After the first driving member 71 rotates, it drives the front wheel mechanism 4 to rotate clockwise through the first driven member 72 and the linkage assembly, and drives the rear bracket 2 to rotate counterclockwise through the first driven member 72, thereby realizing the unfolding of the frame. In the unfolded state, the rotation axis between the first driving member 71 and the joint base 61, the rotation axis between the first driving member 71 and the first driven member 72, and the rotation axis between the first driven member 72 and the second joint 63 are all on the same straight line, and form a triangle with the rotation axis between the second joint 63 and the rear bracket 2, thus forming an unfolded and locked state, improving stability and safety.

[0028] Reference Figures 1 to 6 In this embodiment, the first driving component 71 is loosely fitted onto the joint base 61, and then receives the driving force from the upper bracket 3 by contacting the driving surface. This facilitates assembly and avoids interference. In other optional embodiments, the first driving component 71 can also be fixedly connected to the first joint 62, in which case the upper bracket 3 and the first driving component 71 rotate synchronously. This is not a limitation.

[0029] Reference Figures 1 to 6 Specifically, the front wheel mechanism 4 includes a front wheel axle 41 rotatably connected to the front bracket 1, and an extension arm 42 rotatably connected to the second link 74 is provided on the front wheel axle 41. The extension arm 42 is rotatably connected to the second link 74, which has the advantages of simple structure and convenient assembly.

[0030] Reference Figures 1 to 6Preferably, when the frame is in the unfolded state, the angle between the front support 1 and the first link 73 is less than or equal to 15°, which makes the frame structure more compact; specifically, as shown in the example Figure 2 As shown, in the unfolded state, the front support 1 and the first connecting rod 73 are arranged almost parallel to each other; in this embodiment, the front support 1 is U-shaped, including a horizontal bar and two vertical bars; the first connecting rod 73 is also U-shaped, including a horizontal bar and two vertical bars; that is, in the unfolded state, the angle between the vertical bar of the front support 1 and the vertical bar of the first connecting rod 73 is less than or equal to 15°. Example 2:

[0031] A folding frame, see reference Figures 1 to 7 Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that: in this embodiment, the linkage mechanism eliminates the first driven member between the first driving member 71 and the first connecting rod 73, and also includes a second driving member 81 fixedly connected to the first driving member 71, and a second driven member 82 fixedly mounted on the rear bracket 2; that is, the upper bracket 3, the first driving member 71 and the second driving member 81 rotate synchronously, the first driving member 71 is directly rotatably connected to the first connecting rod 73 and drives the front wheel mechanism 4 to rotate and fold, and the second driving member 81 engages with the second driven member 82 and drives the rear bracket 2 to rotate and fold.

[0032] Reference Figures 1 to 7 In this embodiment, the first driving member 71 and the linkage assembly form the first linkage path, and the second driving member 81 and the second driven member 82 form the second linkage path. The two linkage paths are independent of each other, which simplifies the structure and reduces the probability of linkage mechanism failure. Moreover, even if the first linkage path fails, the frame can be folded through the second linkage path, which facilitates transportation and maintenance.

[0033] Reference Figure 7 Specifically, in this embodiment, the second driving member 81 and the second driven member 82 achieve transmission through gear meshing, which makes the structure simple and the transmission stable. In other optional embodiments, the second driving member 81 and the second driven member 82 can also be connected in other ways to achieve transmission, which is not limited here. Example 3:

[0034] A type of stroller, referring to Figures 1 to 7 It includes the folding frame as described in Embodiment 1 or Embodiment 2.

Claims

1. A folding frame, comprising a front support, a front wheel mechanism rotatably connected to the front support, a rear support rotatably connected to the front support, a rear wheel mechanism connected to the rear support, and an upper support rotatably connected to the front support. Its features are: It also includes a linkage mechanism connected to the front wheel mechanism; When the upper bracket rotates and folds relative to the front bracket, the linkage mechanism drives the front wheel mechanism to rotate and fold relative to the front bracket.

2. The folding frame according to claim 1, characterized in that: The linkage mechanism includes a first driving member and a linkage assembly that is rotatably connected to the first driving member and the front wheel mechanism respectively; the first driving member is used to receive the driving force from the upper support.

3. The folding frame according to claim 2, characterized in that: The linkage assembly includes a first link rotatably connected to the first drive member; when the frame is in the deployed state, the angle between the front support and the first link is less than or equal to 15°.

4. The folding frame according to claim 3, characterized in that: The linkage assembly further includes a second linkage that is rotatably connected to the front wheel mechanism; the first linkage and the second linkage are fixedly connected.

5. The folding frame according to claim 2, characterized in that: The first driving member is fixedly connected to the upper bracket; or, the first driving member is rotatably connected to the front bracket, and the upper bracket is provided with a driving surface that can rotate to contact the first driving member.

6. The folding frame according to claim 2, characterized in that: The linkage mechanism further includes a first driven member rotatably connected to the first driving member and the linkage assembly respectively, and the first driven member is rotatably connected to the rear support; or, the linkage mechanism further includes a second driving member fixedly connected to the first driving member, and a second driven member fixedly disposed on the rear support; the second driving member engages with the second driven member and transmits driving force.

7. The folding frame according to claim 4, characterized in that: The front wheel mechanism includes a front wheel axle rotatably connected to the front support, and an extension arm rotatably connected to the second link is provided on the front wheel axle.

8. The folding frame according to claim 1, characterized in that: The linkage mechanism can also drive the rear support to rotate and fold relative to the front support.

9. A folding frame, comprising a front support, a front wheel mechanism rotatably connected to the front support, a rear support rotatably connected to the front support, a rear wheel mechanism connected to the rear support, and an upper support rotatably connected to the rear support. Its features are: It also includes a linkage mechanism connected to the front wheel mechanism; When the upper bracket rotates and folds relative to the rear bracket, the linkage mechanism drives the front wheel mechanism to rotate and fold relative to the front bracket.

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

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