A baby carriage frame with small folding volume

Abstract

The present invention discloses a baby carriage frame with a small folding volume, which comprises a bottom bracket extending front and rear, a front wheel bracket and a rear wheel bracket spaced apart front and rear, a front wheel connected to the lower side of the front wheel bracket, and a rear wheel connected to the lower side of the rear wheel bracket. The upper sides of the front wheel bracket and the rear wheel bracket are both rotatably connected to the bottom bracket. During the folding process of the frame, the front wheel rotates backward with the front wheel bracket, and the rear wheel rotates forward with the rear wheel bracket. Therefore, after the frame is folded, the distance between the front wheel and the rear wheel becomes smaller, and the upper and lower distances between the bottom bracket and the front wheel and the rear wheel also become smaller. In this way, the overall front-to-back dimensions and the upper and lower dimensions of the folded frame are small, so that the overall volume of the folded frame is small, which is convenient for storage and carrying.

Description

Technical Field

[0001] The invention relates to infant products, in particular to a baby carriage frame with a small folding volume. Background Art

[0002] A baby stroller can be used for a child to sit or lie down, and the parents or other caregivers can push the baby stroller to move, which greatly reduces the burden of holding the child. A baby stroller generally includes a foldable frame that can be switched between an unfolded state and a folded state, a locking mechanism for locking the frame in the unfolded state, and a front wheel is connected to the front lower part of the frame, and a rear wheel is connected to the rear lower part. When the frame is in the unfolded state, the front and rear wheels are supported on the ground. When the baby stroller is not needed, the locking mechanism is unlocked first, and then the frame is folded up.

[0003] Some baby stroller frames on the market are relatively large in volume after being folded, thus requiring a large space and being inconvenient to store and carry. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned disadvantages and provide a baby carriage frame with a small folded volume, which is small in volume after folding and is convenient for storage and carrying.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A baby carriage frame with a small folding volume, which can be converted between an unfolded state and a folded state, the frame includes a bottom bracket extending front and rear, a front wheel bracket and a rear wheel bracket spaced apart front and rear, a front wheel connected to the lower side of the front wheel bracket, and a rear wheel connected to the lower side of the rear wheel bracket, the upper sides of the front wheel bracket and the rear wheel bracket are both rotatably connected to the bottom bracket, and during the folding process of the frame, the front wheel rotates backward with the front wheel bracket, and the rear wheel rotates forward with the rear wheel bracket.

[0007] The baby carriage frame with a small folding volume also includes a linkage device and a front bracket pivotally connected to the bottom bracket at the lower side. The linkage device is connected to the front bracket, the front wheel bracket and the rear wheel bracket. During the folding process of the frame, the front bracket rotates rearward and downward. The linkage device is driven by the front bracket rotating rearward and downward to link the front wheel bracket to rotate backward and link the rear wheel bracket to rotate forward.

[0008] The linkage device includes a front linkage mechanism, one side of which is rotatably connected to the front bracket and the front wheel bracket, and the other side is relatively rotatably connected to the bottom bracket and can move forward and backward relative to the bottom bracket. When the front bracket rotates backward and downward, the front linkage mechanism is driven to link the front wheel bracket to rotate backward.

[0009] The front linkage mechanism includes a first linkage member, a second linkage member, and a moving member. The front side of the first linkage member is rotatably connected to the front bracket, the front side of the second linkage member is rotatably connected to the front wheel bracket, the moving member is connected to the bottom bracket so as to be relatively movable forward and backward, and the rear sides of the first linkage member and the second linkage member are pivotally connected to the moving member.

[0010] The linkage device also includes a rear linkage mechanism, the front side of which is connected to the front linkage mechanism, and the rear side is rotatably connected to the rear wheel bracket. When the front bracket rotates rearward and downward, the rear linkage mechanism is driven by the front linkage mechanism to link the rear wheel bracket and the rear wheel to rotate forward.

[0011] The rear linkage mechanism comprises a third linkage member which can move forward and backward relative to the bottom bracket. The front side of the third linkage member is connected to the moving member, and the rear side is rotationally connected to the rear wheel bracket.

[0012] The rear side of the third linkage is rotatably connected to the rear wheel bracket via a first pivot, and the upper side of the rear wheel bracket is rotatably connected to the bottom bracket via a second pivot. When the frame is in the unfolded state, the first pivot is located on the upper side of the second pivot.

[0013] The movable member is arranged in the bottom bracket so as to be relatively movable forward and backward, and the bottom bracket is provided with a long hole corresponding to the rear sides of the first linkage member and the second linkage member.

[0014] The long hole includes a second long hole arranged on the bottom wall of the bottom bracket, a groove is arranged on the rear side of the front wheel bracket, the rear side of the second linkage member extends upward from the second long hole into the bottom bracket and is pivotally connected to the moving member, and the front side extends into the groove and is pivotally connected to the front wheel bracket.

[0015] The front side of the third linkage member is arranged in the bottom bracket so as to be relatively movable forward and backward.

[0016] The bottom bracket includes a bottom tube, a rear fixing seat whose front side is fixedly connected to the rear side of the bottom tube, and the upper side of the rear wheel bracket is rotatably connected to the rear fixing seat; the front side of the third linkage member is arranged in the bottom tube so as to be relatively movable forward and backward, and the rear fixing seat is provided with a accommodating space that passes through front and back and communicates with the interior of the bottom tube, the upper side of the rear wheel bracket is at least partially located in the accommodating space, and the rear side of the third linkage member extends into the accommodating space and is rotatably connected to the rear wheel bracket.

[0017] The baby carriage frame with a small folding volume also includes an upper bracket, and the lower side of the upper bracket is rotatably connected to the upper side of the front bracket.

[0018] The upper bracket is constructed so that, when the frame is in a folded state, the front end of the upper bracket is flush with the front end of the bottom bracket or located behind the front end of the bottom bracket, and the rear end of the upper bracket is flush with the rear end of the bottom bracket or located at the rear end of the bottom bracket.

[0019] The frame also includes a rear bracket, the upper side of the rear bracket is pivotally connected to the upper bracket, and the lower side is pivotally connected to the bottom bracket. The upper bracket, rear bracket, front bracket and bottom bracket form a four-bar structure, and the pivot point between the front bracket and the bottom bracket is located in front of the pivot point between the rear bracket and the bottom bracket.

[0020] The rear bracket is configured such that, when the vehicle frame is in a folded state, a rear end of the rear bracket is flush with a rear end of the bottom bracket or is located in front of the rear end of the bottom bracket.

[0021] The baby carriage frame with a small folding volume also includes a seat support and a seat linkage. The seat linkage is pivotally connected to the seat support at the upper side and pivotally connected to the rear bracket at the lower side. The seat support is also pivotally connected to the front bracket.

[0022] The connection between the seat support and the front bracket is located in front of the connection between the seat support and the seat linkage.

[0023] Preferably, the seat support is configured so that, when the frame is in a folded state, the front end of the seat support is flush with the front end of the bottom bracket or located behind the front end of the bottom bracket, and the rear end of the seat support is flush with the rear end of the bottom bracket or located in front of the rear end of the bottom bracket.

[0024] The rear bracket includes a lower connecting member, an upper connecting member connected to the lower connecting member so as to be relatively movable up and down, and a spring arranged between the upper connecting member and the lower connecting member for driving the upper connecting member to move upward. The lower connecting member is pivotally connected to the bottom bracket, and the upper connecting member is pivotally connected to the upper bracket.

[0025] The lower side of the upper connecting piece extends into the lower connecting piece, and a sleeve is sleeved on the upper connecting piece. The spring is sleeved on the upper connecting piece and located in the sleeve, and the lower end of the spring abuts against the upper end of the lower connecting piece, and the upper end abuts against the top wall inside the sleeve.

[0026] The beneficial effects of the present invention are:

[0027] The structure of the baby carriage frame of the present invention reduces the distance between the front wheel and the rear wheel after folding, and reduces the vertical distance between the bottom bracket and the front wheel and the rear wheel. Thus, the frame after folding has a small front-to-back dimension and a small vertical dimension. Thus, the frame after folding has a small overall volume, occupies a small space, and is easy to store and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a plan view of the baby carriage frame of the present invention in an unfolded state;

[0029] Figure 2 It is a three-dimensional schematic diagram of the baby carriage frame of the present invention in an unfolded state;

[0030] Figure 3 is a three-dimensional schematic diagram of another angle of the baby stroller frame of the present invention in an unfolded state;

[0031] Figure 4 It is a plan view schematically showing the baby carriage frame of the present invention in the process of folding;

[0032] Figure 5 It is a three-dimensional schematic diagram of the baby carriage frame of the present invention in the folding process;

[0033] Figure 6 It is a plan view of the baby carriage frame of the present invention in a folded state;

[0034] Figure 7 It is a three-dimensional schematic diagram of the baby carriage frame of the present invention in a folded state;

[0035] Figure 8 Based on Figure 2 A magnified diagram of the explosion of part B in the middle;

[0036] Fig. 9 Based on Figure 1 A schematic diagram of the cross section enlarged along the AA direction;

[0037] Fig.10 Based on Figure 4 Enlarged schematic diagram of the cross section in the CC direction;

[0038] Fig.11 Based on Figure 4 Enlarged schematic diagram of the cross section in the middle DD direction;

[0039] Fig.12 Based on Figure 6 Enlarged schematic diagram of the cross section in the EE direction;

[0040] Fig.13 An exploded and enlarged diagram of the rear support for the invented baby carriage frame;

[0041] Fig.14 The invention is a schematic enlarged cross-sectional view of the rear support of the stroller frame. DETAILED DESCRIPTION

[0042] like Figures 1 to 7As shown, the baby carriage frame with a small folding volume of the present invention can be converted between an unfolded state and a folded state, the frame includes a bottom bracket 1 extending front and rear, a front wheel bracket 2 and a rear wheel bracket 3 spaced apart front and rear, a front wheel 4 connected to the lower side of the front wheel bracket 2, and a rear wheel 5 connected to the lower side of the rear wheel bracket 3. The upper sides of the front wheel bracket 2 and the rear wheel bracket 3 are both rotatably connected to the bottom bracket 1. During the folding process of the frame, that is, during the process of the frame converting from the unfolded state to the folded state, the front wheel 4 rotates backward with the front wheel bracket 2, and the rear wheel 5 rotates forward with the rear wheel bracket 3.

[0043] The baby carriage frame with a small folding volume of the present invention further includes a linkage device, a front bracket 6 pivotally connected to the bottom bracket 1 at the lower side, the linkage device is connected to the front bracket 6, the front wheel bracket 2, and the rear wheel bracket 3, and the linkage device is configured to be driven by the front bracket 6 rotating backward and downward to link the front wheel bracket 2 to rotate backward, and to link the rear wheel bracket 3 to rotate forward. That is, during the folding process of the frame, when the front bracket 6 rotates backward and downward, the linkage device will be driven to link the front wheel bracket 2 to rotate backward, and to link the rear wheel bracket 3 to rotate forward, so that the front wheel 4 connected to the front wheel bracket 2 rotates backward with the front wheel bracket 2, and the rear wheel 5 connected to the rear wheel bracket 3 rotates forward with the rear wheel bracket 3.

[0044] The linkage device includes a front linkage mechanism, one side of which is rotatably connected to the front bracket 6, and the other side of which is relatively rotatably connected to the bottom bracket 1 and can move forward and backward relative to the bottom bracket 1. When the front bracket 6 rotates backward and downward, the front linkage mechanism is driven to link the front wheel bracket 2 to rotate backward.

[0045] Combination Figures 8 to 12 As shown, in this embodiment, the front linkage mechanism includes a first linkage member 71, a second linkage member 72, and a moving member 73. The front side of the first linkage member 71 is pivoted to the front bracket 6, the front side of the second linkage member 72 is pivoted to the front wheel bracket 2, and the third linkage member 73 is connected to the bottom bracket 1 so as to be movable forward and backward relative to each other. The rear sides of the first linkage member 71 and the second linkage member 72 are pivoted to the moving member 73. In this way, the rear sides of the first linkage member 71 and the second linkage member 72 can not only rotate relative to the bottom bracket 1 but also move forward and backward relative to the bottom bracket 1.

[0046] In other embodiments, the moving member 73 can be directly set as a pivot, and the rear sides of the first linkage member 71 and the second linkage member 72 are pivotally connected to the pivot; or, one of the rear sides of the first linkage member 71 and the second linkage member 72 is pivotally connected to the pivot, and the other is rotatably connected to the one. In this way, the purpose of the rear sides of the first linkage member 71 and the second linkage member 72 rotating relative to the bottom bracket 1 and being able to move forward and backward relative to the bottom bracket 1 is achieved.

[0047] The linkage device also includes a rear linkage mechanism, the front side of which is connected to the rear side of the front linkage mechanism, and the rear side is rotatably connected to the rear wheel bracket 3. When the front bracket 6 rotates rearward and downward, the rear linkage mechanism is driven by the front linkage mechanism to link the rear wheel bracket 3 and the rear wheel 5 to rotate forward.

[0048] The rear linkage mechanism includes a third linkage member 74 that can move forward and backward relative to the bottom bracket 1. The front side of the third linkage member 74 is connected to the moving member 73, and the rear side is rotatably connected to the rear wheel bracket 3. Preferably, the rear side of the third linkage member 74 is rotatably connected to the rear wheel bracket 3 through a first pivot 75, and the upper side of the rear wheel bracket 3 is rotatably connected to the bottom bracket 1 through a second pivot 31. When the frame is in the unfolded state, the first pivot 75 is located on the upper side of the second pivot 31. In this way, when the third linkage member 74 moves backward, the rear wheel bracket 3 can rotate forward with the second pivot 31 as the rotation axis.

[0049] In this embodiment, preferably, the front bracket 6 and the bottom bracket 1 are formed into an L shape, the front bracket 6 is in a shape extending upward and backward from front to back, and the lower side of the front bracket 6 is rotatably connected to the front side of the bottom bracket 1.

[0050] When the stroller frame of the present invention is to be folded, the front bracket 6 is rotated backward and downward, and the front side of the first linkage member 71 is driven to move downward and rotate, so that the rear side of the first linkage member 71 moves backward along the bottom bracket 1, and thus the moving member 73 is driven to move backward along the bottom bracket 1, so that the rear side of the second linkage member 72 is driven to move backward along the bottom bracket 1, and the front side of the second linkage member 72 will pull the front wheel bracket 2 to rotate forward, so that the front wheel 4 rotates backward together with the front wheel bracket 2; and when the moving member 73 is driven to move backward along the bottom bracket 1, the third linkage member 74 is pushed to move backward, so that the rear wheel bracket 3 can rotate forward with the second pivot 31 as the rotation axis, and the rear wheel 5 rotates forward together with the rear wheel bracket 3 (such as Figure 4 , 5 , 10); until the front bracket 6 rotates close to the bottom bracket 1 and stops rotating, the front wheel 4 and the rear wheel 5 are also close to the bottom bracket 1, and the frame is completely folded (as shown in FIG. Figure 6 , 7 , 12). At this time, the distance between the front wheel 4 and the rear wheel 5 becomes smaller, and the vertical distance between the bottom bracket 1 and the front wheel 3 and the rear wheel 4 also becomes smaller, so that the overall front-to-back size and vertical size of the folded frame are small, so that the overall volume of the folded frame is small, which is convenient for storage and carrying.

[0051] Preferably, the first linkage member 71 is configured to be a bent or arc shape with an opening toward the rear. Such a configuration enables the rear side of the first linkage member 71 to move backward faster and a greater distance when the front side of the first linkage member 71 is driven by the front bracket 6 rotating toward the rear and downward, thereby enabling the front wheel bracket 2 and the front wheel 4 to be pulled backward to a greater angle faster through the second linkage member 72, and the rear wheel bracket 3 and the rear wheel 5 to be driven forward to a greater angle through the third linkage member 74, thereby accelerating the time for the frame to be folded.

[0052] In this embodiment, the moving member 73 is arranged in the bottom bracket 1 so as to be relatively movable forward and backward (such as Fig. 9 The bottom bracket 1 is provided with a long hole (as shown) corresponding to the rear sides of the first linkage member 71 and the second linkage member 72. Figure 3 , 9 11 and 12), the arrangement of the long hole can avoid interference with the forward and backward movement of the moving member 73. Preferably, the long hole includes a second long hole 11 arranged on the bottom wall of the bottom bracket 1, and the rear side of the front wheel bracket 2 is provided with a groove 20 ( Figure 8 , 10 As shown in FIG. 1 , the rear side of the second linkage member 72 extends upward from the second long hole 11 into the bottom bracket 1 and is pivotally connected to the moving member 73, and the front side extends into the groove 20 and is pivotally connected to the front wheel bracket 2. This arrangement makes it difficult for the second linkage member 72 to be damaged by collision with foreign objects, thereby ensuring that the second linkage member 72 can smoothly pull the front wheel bracket 2 to rotate backward during the folding process of the frame, thereby ensuring that the baby carriage frame of the present invention can be folded to a small size.

[0053] The long hole also includes a first long hole 12 arranged on a side wall of the bottom bracket 1, and the rear side of the first linkage member 71 is placed outside the side of the bottom bracket 1. A pivot (not shown) passes through the rear side of the first linkage member 71 and then passes through the first long hole 12 to extend into the bottom bracket 1 and is pivotally connected to the moving member 73.

[0054] In other embodiments, a slotted hole can be provided only on one side wall of the bottom bracket 1, and the rear sides of the first linkage member 71 and the second linkage member 71 are located outside the side of the bottom bracket 1, and a pivot passes through the rear sides of the first linkage member 71 and the second linkage member 71 and then passes through the slotted hole to extend into the bottom bracket 1 and be pivotally connected with the moving member 73. In another embodiment, the moving member 73 can only be partially provided in the bottom bracket 1 so as to be relatively movable forward and backward, such as, when the moving member 73 is provided as a pivot, the pivot connects the bottom bracket 1 with the first linkage member 71 and the second linkage member 72 left and right, at this time, the moving member 73 is only partially in the bottom bracket, and is also partially outside the bottom bracket 1; the moving member 73 can also be provided in a suitable shape and is completely located outside the bottom bracket, and when the moving member 73 is provided in this way and the third linkage member 74 is completely located in the bottom bracket 1, a slotted hole can be provided on the bottom bracket 1, so that a connecting member such as a rivet passes through the slotted hole to connect the moving member 73 and the third linkage member 74.

[0055] In this embodiment, the front side of the third linkage member 74 can be relatively movably arranged in the bottom bracket 1 for forward and backward movement. The bottom bracket 1 includes a bottom tube 13 and a rear fixing seat 15 whose front side is fixedly connected to the rear side of the bottom tube 13. The lower side of the front bracket 6 and the upper side of the front wheel bracket 2 are pivotally connected to the front fixing seat 14, and the upper side of the rear wheel bracket 3 is rotatably connected to the rear fixing seat 15; the front side of the third linkage member 74 can be relatively movably arranged in the bottom tube 13 for forward and backward movement. The rear fixing seat 15 is provided with a accommodating space 151 which passes through the front and rear and communicates with the interior of the bottom tube 13. The upper side of the rear wheel bracket 3 is at least partially located in the accommodating space 151, and the rear side of the third linkage member 74 extends into the accommodating space 151 and is rotatably connected to the rear wheel bracket 3. With such arrangement, not only can the third linkage member 74 in the bottom bracket 1 be prevented from being interfered by foreign objects and affecting the linkage rotation of the rear wheel bracket 3, thereby also preventing the linkage rotation of the front wheel bracket 2 from being affected; and the arrangement of the rear fixing seat 15 can also improve the strength of the connection between the rear wheel bracket 3 and the bottom bracket 1.

[0056] The moving member 73 can be arranged in the bottom tube 13 front and back, and the long holes 11 and 12 are arranged on the tube wall of the bottom tube 13 .

[0057] The bottom bracket 1 further includes a front fixing seat 14 whose rear side is fixedly connected to the front side of the bottom tube 13 , and the lower side of the front bracket 6 and the upper side of the front wheel bracket 2 are pivotally connected to the front fixing seat 14 .

[0058] In this embodiment, the frame further includes an upper bracket 8, the lower side of which is rotatably connected to the upper side of the front bracket 6. With such a configuration, when the baby carriage frame of the present invention is in an unfolded state, the upper bracket 8 and the front bracket 6 are relatively high as a whole, so that it is convenient for adults to push the baby carriage; when the baby carriage frame of the present invention is to be folded, the lower side of the upper bracket 8 is rotated and moved backward and downward, and the upper side of the upper bracket 8 is rotated forward at the same time, so that the front bracket 6 is driven to rotate backward and downward and approach the bottom bracket 1, and the rotation of the front bracket 6 backward and downward can drive the front wheel 4 and the front wheel bracket 2 to rotate backward, and drive the rear wheel 5 and the rear wheel bracket 3 to rotate forward. When the frame is in a folded state, the upper bracket 8 is close to the front bracket 6, and the front bracket 6 is close to the bottom bracket 1, so that the volume of the frame after folding is still small.

[0059] Preferably, the upper bracket 8 is constructed so that, when the frame is in the folded state, the front end of the upper bracket 8 does not extend beyond the front end of the bottom bracket 1, and the rear end does not extend beyond the rear end of the bottom bracket 1, that is, when the frame is in the folded state, the front end of the upper bracket 8 is flush with the front end of the bottom bracket 1 or is located at the rear side of the front end of the bottom bracket 1, and the rear end of the upper bracket 8 is flush with the rear end of the bottom bracket 1 or is located at the front side of the rear end of the bottom bracket 1. In this way, it can be further ensured that the size of the folded frame in the front-to-back direction is small, that is, the volume of the frame after folding is small.

[0060] In other embodiments, the lower side of the upper bracket 8 may be connected to the upper side of the front bracket 6 and may be movable up and down relative to the front bracket 6. Thus, when the frame is folded, the upper bracket 8 may be moved downward, thereby reducing the overall length of the front bracket 6 and the upper bracket 8, and further reducing the overall volume of the frame after folding.

[0061] In this embodiment, the baby carriage frame of the present invention further includes a rear bracket 9, the upper side of the rear bracket 9 is pivotally connected to the upper bracket 8, and the lower side is pivotally connected to the bottom bracket 1, and the upper bracket 8, the rear bracket 9, the front bracket 6, and the bottom bracket 1 constitute a four-bar structure, and the pivot point of the front bracket 6 and the bottom bracket 1 is located in front of the pivot point of the rear bracket 9 and the bottom bracket 1. When the baby carriage frame of the present invention is folded, the lower side of the upper bracket 8 is rotated and moved backward and downward, and the upper side of the upper bracket 8 is rotated forward at the same time, so that the upper sides of the front bracket 6 and the rear bracket 9 are driven to rotate backward and downward and approach the bottom bracket 1. When the frame is in a folded state, the rear bracket 9 is also close to the bottom bracket 1, so that the volume of the frame after folding is still small. In addition, the above-mentioned connection method of the rear bracket 9 and other components of the frame, so that when the frame is folded, the front end of the rear bracket 9 will not extend outside the front end of the bottom bracket 1.

[0062] Preferably, the rear bracket 9 is constructed so that when the frame is in the folded state, the rear end of the rear bracket 9 does not extend beyond the rear end of the bottom bracket 1, that is, when the frame is in the folded state, the rear end of the rear bracket 9 is flush with the rear end of the bottom bracket 1 or is located in front of the rear end of the bottom bracket 1. In this way, it can also be further ensured that the size of the folded frame in the front-to-back direction is small, that is, the volume of the frame after folding is small.

[0063] The baby carriage frame of the present invention further comprises a seat support 10 and a seat linkage 101. The seat linkage 101 is pivotally connected to the seat support 10 at the upper side and pivotally connected to the rear bracket 9 at the lower side. The seat support 10 is also pivotally connected to the front bracket 6. Preferably, the connection 61 between the seat support 10 and the front bracket 6 is located in front of the connection 1011 between the seat support 10 and the seat linkage 101. When the frame is in the unfolded state, the front bracket 6, the rear bracket 9 and the seat linkage 101 support the seat support 10 together, so that when a child sits on the baby carriage, the weight of the child can be stably supported, thereby ensuring the safety of the child. During the folding process of the frame, as the front bracket 6 and the rear bracket 9 rotate and move backward and downward, the seat linkage 101 moves downward together, and under the pull of the seat linkage 101, the seat linkage 101 can further rotate downward and get closer to other components of the frame. The seat support 10 is arranged in such a way that it can be folded together with other components of the frame, without the need to fold the seat linkage 101 separately after the frame is folded, so that the overall folding operation of the baby stroller frame is simpler and the volume is small after folding.

[0064] Preferably, the seat support 10 is arranged such that, when the frame is in the folded state, the front end of the seat support 10 is flush with the front end of the bottom bracket 1 or is located behind the front end of the bottom bracket, and the rear end of the seat support 10 is flush with the rear end of the bottom bracket 1 or is located in front of the rear end of the bottom bracket. With such an arrangement, the front-to-rear dimension of the folded frame is still small, so that the volume of the folded frame is small.

[0065] In this embodiment, the frame further includes a push handle 102, the lower side of which is rotatably connected to the upper side of the upper bracket 8. In this way, when the frame is in the unfolded state, the push handle 102, the upper bracket 8, and the front bracket 6 are higher in overall height, making it more convenient for adults to push the baby carriage; and when folding the frame, the push handle 102 can also be rotated backward and downward or forward and downward so that it can be folded close to the upper bracket 8. That is to say, it is equivalent to setting a component as the push handle 102, the upper bracket 8, and the front bracket 6 pivotally connected in sequence, so that when folding, a three-fold folding can be achieved, so that the overall volume of the folded frame is small, which is convenient for storage and carrying. Preferably, when the frame is in the unfolded state, the front bracket 6, the upper bracket 8, and the push handle 102 are in a shape that extends from bottom to top and backward and upward. In this way, the frame as a whole is more concise.

[0066] When the push handle 102 is provided, in other embodiments, the lower side of the push handle 102 can be connected to the upper side of the upper bracket 8 so as to be relatively movable up and down, so that when the frame is folded, the push handle 102 can be moved downward to reduce the overall length and the overall volume.

[0067] In this embodiment, combined with Figure 1 , 13 As shown in Figures 14, the rear support 9 includes a lower connecting member 91, an upper connecting member 92 connected to the lower connecting member 91 so as to be relatively movable up and down, and a spring 93 disposed between the upper connecting member 92 and the lower connecting member 91 for driving the upper connecting member 92 to move upward. The lower connecting member 91 is pivotally connected to the bottom support 1, and the upper connecting member 92 is pivotally connected to the upper support 8. With such an arrangement, when a child sits on the baby carriage, it has a better shock-absorbing effect.

[0068] Preferably, the lower side of the upper connecting member 92 extends into the lower connecting member 91, and a sleeve 94 is sleeved on the upper connecting member 92. The spring 93 is sleeved on the upper connecting member 92 and located in the sleeve 94, and the lower end of the spring 93 abuts against the upper end of the lower connecting member 91, and the upper end abuts against the inner top wall of the sleeve 94. In this way, when the upper connecting member 92 moves downward, the sleeve 94 presses the spring 93 downward. The sleeve 94 and the spring 93 are arranged in this way to prevent the spring 93 from being interfered with by foreign objects and affecting the shock absorption effect.

[0069] In the above orientation description, the location of the front wheel 4 is the front, the location of the rear wheel 5 is the back, the location of the bottom bracket 1 is the bottom, and the location of the push handle 102 is the top.

[0070] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A baby stroller frame with a small folding volume, which can be switched between an unfolded state and a folded state, characterized in that: The frame includes a bottom bracket extending forward and backward, a front wheel bracket and a rear wheel bracket spaced forward and backward, a front wheel connected to the lower side of the front wheel bracket, and a rear wheel connected to the lower side of the rear wheel bracket, wherein the front wheel bracket and the upper side of the rear wheel bracket are both rotatably connected to the bottom bracket, and during the folding process of the frame, the front wheel rotates backward with the front wheel bracket, and the rear wheel rotates forward with the rear wheel bracket; the frame also includes a linkage device, a front bracket pivotally connected to the bottom bracket at the lower side, and the linkage device includes a front linkage mechanism, one side of the front linkage mechanism is rotatably connected to the front bracket and the front wheel bracket, and the other side is relatively rotatably connected to the bottom bracket and can move forward and backward relative to the bottom bracket; the linkage device also includes a rear linkage mechanism, the front side of the rear linkage mechanism is connected to the front linkage mechanism, and the rear side is rotatably connected to the rear wheel bracket; During the folding process of the frame, the front bracket rotates backward and downward, and the front linkage mechanism is driven by the front bracket rotating backward and downward to link the front wheel bracket to rotate backward, and the rear linkage mechanism is driven by the front linkage mechanism to link the rear wheel bracket and the rear wheel to rotate forward; the front linkage mechanism includes a first linkage member, a second linkage member, and a moving member, the front side of the first linkage member is rotatably connected to the front bracket, the front side of the second linkage member is rotatably connected to the front wheel bracket, the moving member can be connected to the bottom bracket for relative forward and backward movement, and the rear sides of the first linkage member and the second linkage member are pivotally connected to the moving member; the rear linkage mechanism includes a third linkage member that can move forward and backward relative to the bottom bracket, the front side of the third linkage member is connected to the moving member, and the rear side is rotatably connected to the rear wheel bracket; the moving member is arranged in the bottom bracket for relative forward and backward movement, and the bottom bracket is provided with a long hole corresponding to the rear sides of the first linkage member and the second linkage member.

2. The baby stroller frame with a small folding volume according to claim 1, characterized in that: The rear side of the third linkage is rotatably connected to the rear wheel bracket via a first pivot, and the upper side of the rear wheel bracket is rotatably connected to the bottom bracket via a second pivot. When the frame is in the unfolded state, the first pivot is located on the upper side of the second pivot.

3. The baby stroller frame with a small folding volume according to claim 2, characterized in that: The long hole includes a second long hole arranged on the bottom wall of the bottom bracket, a groove is arranged on the rear side of the front wheel bracket, the rear side of the second linkage member extends upward from the second long hole into the bottom bracket and is pivotally connected to the moving member, and the front side extends into the groove and is pivotally connected to the front wheel bracket.

4. The baby stroller frame with a small folded volume according to any one of claims 1 to 3, characterized in that: The front side of the third linkage member is arranged in the bottom bracket so as to be relatively movable forward and backward.

5. The baby carriage frame with a small folded volume according to claim 4, characterized in that: The bottom bracket includes a bottom tube, a rear fixing seat whose front side is fixedly connected to the rear side of the bottom tube, and the upper side of the rear wheel bracket is rotatably connected to the rear fixing seat; the front side of the third linkage member is arranged in the bottom tube so as to be relatively movable forward and backward, and the rear fixing seat is provided with a accommodating space that passes through front and back and communicates with the interior of the bottom tube, the upper side of the rear wheel bracket is at least partially located in the accommodating space, and the rear side of the third linkage member extends into the accommodating space and is rotatably connected to the rear wheel bracket.

6. The baby carriage frame with a small folded volume according to any one of claims 1 to 3 and 5, characterized in that: It also includes an upper bracket, the lower side of which is rotatably connected to the upper side of the front bracket.

7. The baby carriage frame with a small folded volume according to claim 6, characterized in that: The upper bracket is constructed so that, when the frame is in a folded state, the front end of the upper bracket is flush with the front end of the bottom bracket or located behind the front end of the bottom bracket, and the rear end of the upper bracket is flush with the rear end of the bottom bracket or located at the rear end of the bottom bracket.

8. The baby carriage frame with a small folded volume according to claim 7, characterized in that: The frame also includes a rear bracket, the upper side of the rear bracket is pivotally connected to the upper bracket, and the lower side is pivotally connected to the bottom bracket. The upper bracket, rear bracket, front bracket and bottom bracket form a four-bar structure, and the pivot point between the front bracket and the bottom bracket is located in front of the pivot point between the rear bracket and the bottom bracket.

9. The baby carriage frame with a small folded volume according to claim 8, characterized in that: The rear bracket is configured such that, when the vehicle frame is in a folded state, a rear end of the rear bracket is flush with a rear end of the bottom bracket or is located in front of the rear end of the bottom bracket.

10. The baby carriage frame with a small folded volume according to claim 8 or 9, characterized in that: It also includes a seat support component and a seat linkage component. The upper side of the seat linkage component is pivotally connected to the seat support component, and the lower side is pivotally connected to the rear bracket. The seat support component is also pivotally connected to the front bracket.

11. The baby carriage frame with a small folded volume according to claim 10, characterized in that: The connection between the seat support and the front bracket is located in front of the connection between the seat support and the seat linkage.

12. The baby carriage frame with a small folded volume according to claim 11, characterized in that: The seat support is arranged so that, when the vehicle frame is in a folded state, the front end of the seat support is flush with the front end of the bottom bracket or is located behind the front end of the bottom bracket, and the rear end of the seat support is flush with the rear end of the bottom bracket or is located in front of the rear end of the bottom bracket.

13. The baby carriage frame with a small folded volume according to claim 8, 9, 11 or 12, characterized in that: The rear bracket includes a lower connecting member, an upper connecting member connected to the lower connecting member so as to be relatively movable up and down, and a spring arranged between the upper connecting member and the lower connecting member for driving the upper connecting member to move upward. The lower connecting member is pivotally connected to the bottom bracket, and the upper connecting member is pivotally connected to the upper bracket.

14. The baby carriage frame with a small folded volume according to claim 13, characterized in that: The lower side of the upper connecting piece extends into the lower connecting piece, and a sleeve is sleeved on the upper connecting piece. The spring is sleeved on the upper connecting piece and located in the sleeve, and the lower end of the spring abuts against the upper end of the lower connecting piece, and the upper end abuts against the top wall inside the sleeve.

15. The baby stroller frame with a small folded volume according to claim 10, characterized in that: The rear bracket includes a lower connecting member, an upper connecting member connected to the lower connecting member so as to be relatively movable up and down, and a spring arranged between the upper connecting member and the lower connecting member for driving the upper connecting member to move upward. The lower connecting member is pivotally connected to the bottom bracket, and the upper connecting member is pivotally connected to the upper bracket.

16. The baby carriage frame with a small folded volume according to claim 15, characterized in that: The lower side of the upper connecting piece extends into the lower connecting piece, and a sleeve is sleeved on the upper connecting piece. The spring is sleeved on the upper connecting piece and located in the sleeve, and the lower end of the spring abuts against the upper end of the lower connecting piece, and the upper end abuts against the top wall inside the sleeve.

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