Stroller framework

Abstract

The invention discloses a stroller framework which comprises a bottom supporting frame, the bottom supporting frame comprises a first supporting leg and a second supporting leg, wheels are arranged at the lower end of the first supporting leg and the lower end of the second supporting leg, a first connecting base is arranged at the upper end of the first supporting leg, and the upper end of the second supporting leg is rotatably connected to the first connecting base around a first axis. The upper end of the bottom supporting frame is rotatably connected with a push rod assembly, and a linkage assembly capable of driving the first supporting leg and the second supporting leg to rotate and draw close to each other when the push rod assembly and the bottom supporting frame rotate and draw close to the bottom supporting frame is arranged between the push rod assembly and the bottom supporting frame. The seat frame and the first connecting base are rotatably connected around a third axis, and a transmission rod hinged to the seat frame and the push rod assembly and capable of driving the seat frame to rotate and draw close to the first supporting leg when the push rod assembly rotates and draws close to the bottom supporting frame is further arranged between the seat frame and the push rod assembly. The folding chair is simple in structure, flexible to fold and small in size after being folded.

Description

Technical Field

[0001] The present invention relates to a frame for a baby stroller.

Background Art

[0002] Baby strollers are common products during the growth of infants and toddlers. Currently, most baby strollers can be unfolded or folded. In the unfolded state, they are used for children to ride and travel, while in the folded state, they are convenient for carrying or storing.

[0003] The frame of a baby stroller is an important component. Its structure determines whether the baby stroller can be unfolded or folded smoothly, and also determines the size of the space occupied after folding. Currently, the frame structures of baby strollers on the market are various and different. Therefore, the present invention provides a new frame for a baby stroller that is different from the prior art.

Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a frame for a baby stroller with a simple structure, flexible folding and a small volume after folding.

[0005] The present invention is achieved by the following technical solutions:

[0006] A frame for a baby stroller can move from an unfolded position to a folded position after the locking device is unlocked, including a bottom support frame. The bottom support frame includes a first support leg and a second support leg. Wheels are provided at the lower ends of the first support leg and the second support leg. A first connection seat is provided at the upper end of the first support leg. The upper end of the second support leg is rotatably connected to the first connection seat around a first axis. A push rod assembly is rotatably connected to the upper end of the bottom support frame. A linkage assembly is provided between the push rod assembly and the bottom support frame, which can drive the first support leg and the second support leg to rotate and approach each other when the push rod assembly rotates and approaches the bottom support frame. The frame for the baby stroller further includes a seat frame. The seat frame is rotatably connected to the first connection seat around a third axis. A transmission rod is also provided between the seat frame and the push rod assembly, which is hinged to both of them and can drive the seat frame to rotate and approach the first support leg when the push rod assembly rotates and approaches the bottom support frame.

[0007] The push rod assembly includes a second connection seat rotatably connected to the first connection seat around a fourth axis. A lower push rod is fixedly connected to the second connection seat. A hand push rod that can move relative to it is connected to the lower push rod.

[0008] One end of the transmission rod is hinged to the seat frame around a fifth axis, and the other end is hinged to the second connection seat around a sixth axis.

[0009] The seat frame includes a seat rod and an extension seat fixed on the seat rod and extending obliquely downward. The extension seat is rotatably connected to the first connection seat around the third axis.

[0010] The child stroller frame further includes an armrest, and the armrest is rotatably connected to the second connecting seat about the sixth axis.

[0011] The armrest is rotatably connected to the transmission rod. A receiving groove is provided on the armrest. The upper end of the transmission rod extends into the receiving groove and is hinged to the second connecting seat. The receiving groove has a first side wall and a second side wall. When the child stroller frame is in the unfolded position, the first side wall abuts against one side of the transmission rod and the second side wall abuts against the other side of the transmission rod to position the armrest. The receiving groove further has a third side wall. During the movement of the child stroller frame from the unfolded position to the folded position, the armrest rotates relative to the transmission rod to reach a position where the third side wall abuts against the transmission rod.

[0012] A limiting step is provided on the second connecting seat, and an abutting surface that can abut against the limiting step is provided on the armrest. When the child stroller frame is in the unfolded position, the limiting step abuts against the abutting surface.

[0013] The linkage assembly includes a first linkage rod, a second linkage rod, and a third linkage rod. One end of the first linkage rod is hinged to the first support leg about the seventh axis. The other end of the first linkage rod is hinged to the second linkage rod about the eighth axis. The second linkage rod is hinged to the second support leg about the ninth axis at a position away from one end of the first linkage rod. The upper end of the third linkage rod is hinged to the second connecting seat about the tenth axis and is offset from the fourth axis position. The lower end of the third linkage rod is hinged to the first linkage rod or the second linkage rod about the eighth axis.

[0014] The locking device includes a plurality of first locking grooves provided on the first connecting seat in the circumferential direction, a plurality of second locking grooves provided on the second connecting seat in the circumferential direction, a locking gear that can move horizontally and can be simultaneously engaged with the first locking grooves and the second locking grooves in the space formed by the first connecting seat and the second connecting seat, a movable block that can rotate between the locking gear and the second connecting seat and can move horizontally when rotating to push the locking gear out of engagement with the second locking groove, and a first return spring that can push the locking gear to return horizontally between the locking gear and the first connecting seat.

[0015] The described hand push rod is slidably connected to the lower push rod, and a locking member capable of locking the two is provided between the hand push rod and the lower push rod. A sliding rod that can be pushed by the hand push rod when the hand push rod contracts into the lower push rod is provided in the second connecting seat. A pushing portion that can push the movable block to rotate when the sliding rod slides downward is provided at the lower end of the sliding rod. A plurality of inclined grooves are provided on the movable block along the circumferential direction. An inclined protrusion that cooperates with the inclined grooves and can push the movable block to move horizontally when the movable block rotates is provided on the second connecting seat. A second return spring that can push the sliding rod to reset is also provided in the second connecting seat.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. When the folding frame of the baby stroller of the present invention is folded, during the process of the push rod assembly rotating and approaching the bottom support frame, the first support leg and the second support leg are driven to rotate and approach relative to each other through the linkage assembly. And during this process, the push rod assembly pushes against the transmission rod and rotates relative to the transmission rod, and the transmission rod then pushes against the seat frame and makes the seat frame rotate relative to the first connecting seat, so that the seat frame also folds and approaches the first support leg. The entire folding frame structure of the baby stroller is simple and compact, the unfolding or folding is smooth and flexible, and the volume after folding is small, which is convenient for carrying or storing, and is suitable for popularization and application.

[0018] 2. The folding frame of the baby stroller of the present invention further includes an armrest for children to hold to ensure safety. The armrest, the transmission rod and the second connecting seat are rotatably connected. When the folding frame of the baby stroller is in the unfolded position, the first side wall and the second side wall on the armrest abut against both sides of the transmission rod. At this time, the transmission rod can position the armrest so that the armrest stays in the unfolded position for children to hold. When the folding frame of the baby stroller moves from the unfolded position to the folded position, the armrest, the transmission rod and the second connecting seat rotate relative to each other, and the third side wall on the armrest gradually abuts against one side of the transmission rod, so that the armrest can be folded and stored compactly.

[0019] 3. The seat frame of the present invention includes a seat rod and an extension seat fixed on the seat rod. The extension seat extends obliquely downward and is rotatably connected to the first connecting seat. Therefore, while ensuring that the folding frame structure of the baby stroller is simple and compact, it can also ensure the smooth folding or unfolding of the seat frame.

Description of the Drawings

[0020] Figure 1 is one of the perspective views of the present invention;

[0021] Figure 2 is the second perspective view of the present invention;

[0022] Figure 3 is Figure 2 the enlarged view at B in

[0023] Figure 4 is the side view of the present invention;

[0024] Figure 5 is a perspective view of the present invention during the folding process;

[0025] Figure 6 is a side view of the present invention during the folding process;

[0026] Figure 7 is a side view of the present invention in the folded position;

[0027] Figure 8 is one of the perspective views of the components of the present invention;

[0028] Figure 9 is another perspective view of the components of the present invention;

[0029] Figure 10 is a partial cross-sectional view of the present invention;

[0030] Figure 11 is one of the exploded views of the components of the present invention;

[0031] Figure 12 is another exploded view of the components of the present invention.

Detailed Embodiments

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] As Figures 1 to 7 shown, a stroller frame for children can move from the unfolded position to the folded position after the locking device is unlocked, and can be used for children to sit in the unfolded position as shown in Figure 1 . Of course, when the stroller frame is used as a stroller for children, a seat cushion and the like need to be additionally installed to make the children sit comfortably. In the folded position as shown in Figure 7 , it is convenient for users to carry or store. For example, it can be carried in the trunk of a car when traveling, or can be carried on the shoulder with a strap.

[0034] As Figures 1 to 7As shown, the stroller frame includes a bottom support frame 1, which can be unfolded or folded to provide effective support on the ground. Specifically, the bottom support frame 1 includes a first support leg 11 and a second support leg 12. Wheels 13 are provided at the lower ends of the first support leg 11 and the second support leg 12. A first connecting seat 14 is provided at the upper end of the first support leg 11. The upper end of the second support leg 12 is rotatably connected to the first connecting seat 14 about a first axis A. A push rod assembly 2 is rotatably connected to the upper end of the bottom support frame 1. A linkage assembly 3 is provided between the push rod assembly 2 and the bottom support frame 1, which can drive the first support leg 11 and the second support leg 12 to rotate and approach each other when the push rod assembly 2 rotates and approaches the bottom support frame 1. When the stroller frame is folded, first unlock the locking device, and then when the push rod assembly 2 rotates and approaches the bottom support frame 1, the linkage assembly 3 drives the first support leg 11 and the second support leg 12 to rotate relative to each other and approach, so that when the push rod assembly 2 rotates and folds, the bottom support frame 1 is also driven to fold, thus simplifying the folding operation. The locking device can adopt the traditional engaging structure of a pin and a hole, or a locking device with a specific structure in the embodiment. The specific structure of the locking device in this embodiment will be described in detail later.

[0035] As Figures 1 to 7 shown, the stroller frame further includes a seat frame 4, which is used to support the seat for children to sit on. The seat frame 4 is rotatably connected to the first connecting seat 14 about a third axis C. A transmission rod 5 is also provided between the seat frame 4 and the push rod assembly 2, which is hinged to both of them and can drive the seat frame 4 to rotate and approach the first support leg 11 when the push rod assembly 2 rotates and approaches the bottom support frame 1. During the folding process of the push rod assembly 2 rotating relative to the bottom support frame 1, the push rod assembly 2 pushes against the transmission rod 5 and rotates relative to the transmission rod 5, and the transmission rod 5 then pushes against the seat frame 4 and makes the seat frame 4 rotate relative to the first connecting seat 14, so that the seat frame 4 also folds and approaches the first support leg 11. Therefore, as long as the push rod assembly 2 rotates and folds relative to the bottom support frame 1, the bottom support frame 1 itself and the seat frame 4 can be folded together in a linkage manner, making the entire folding operation very simple and fast. Moreover, the entire stroller frame has a simple and compact structure, is smooth and flexible when unfolded or folded, and has a small volume after folding, which is convenient for carrying or storing.

[0036] As Figure 1 and Figure 2 , and Figures 4 to 7As shown, the push rod assembly 2 includes a second connecting seat 21 rotatably connected to the first connecting seat 14 about the fourth axis D. A lower push rod 22 is fixedly connected to the second connecting seat 21, and a hand push rod 23 capable of moving relative to the lower push rod 22 is connected to the lower push rod 22. The hand push rod 23 can be configured to be rotatably connected to the lower push rod 22 to be unfolded or folded, or can be configured to slide telescopically relative to the lower push rod 22. In this embodiment, the hand push rod 23 is slidably disposed within the lower push rod 22. When unfolded, the hand push rod 23 is pulled out, and when folded, the hand push rod 23 is retracted deeper into the lower push rod 22.

[0037] As Figure 5 shown in FIGS. 6, Figure 10 and Figure 11 As shown, one end of the transmission rod 5 is hinged to the seat frame 4 about the fifth axis E, and the other end is hinged to the second connecting seat 21 about the sixth axis F.

[0038] As Figure 3 , Figure 5 and Figure 11 As shown, the seat frame 4 includes a seat rod 41 and an extension seat 42 fixed to the seat rod 41 and extending obliquely downward. The extension seat 42 is rotatably connected to the first connecting seat 14 about the third axis C, ensuring that the folding or unfolding of the seat frame 4 is smooth while ensuring that the skeleton structure of the stroller is simple and compact.

[0039] The stroller skeleton of this embodiment further includes an armrest 6 to facilitate a child's grip and ensure safety. The armrest 6 is rotatably connected to the second connecting seat 21 about the sixth axis F.

[0040] As Figure 10As shown, the armrest 6 is rotatably connected to the transmission rod 5. A receiving groove 63 is provided on the armrest 6. The upper end of the transmission rod 5 extends into the receiving groove 63 and is hinged to the second connecting seat 21. The receiving groove 63 has a first side wall 61 and a second side wall 62. When the child stroller frame is in the unfolded position, the first side wall 61 abuts against one side of the transmission rod 5 and the second side wall 62 abuts against the other side of the transmission rod 5 to position the armrest 6. The receiving groove 63 further has a third side wall 64. During the movement of the child stroller frame from the unfolded position to the folded position, the armrest 6 rotates relative to the transmission rod 5 to reach a position where the third side wall 64 abuts against the transmission rod 5. The upper end of the transmission rod 5 is inserted into the interior of the armrest 6 from the receiving groove 63, which is easy to assemble and can also make the structure of the child stroller frame simple and compact. When the child stroller frame is in the unfolded position, the armrest 6 is positioned by the abutment of the first side wall 61 against one side of the transmission rod 5 and the abutment of the second side wall 62 against the other side of the transmission rod 5, so that the armrest 6 is held in the unfolded position for the child to grasp. When the child stroller frame is folded, the armrest 6 can rotate relative to the transmission rod 5 until the third side wall 64 abuts against the transmission rod 5, enabling the armrest 6 to be folded and stored compactly.

[0041] As Figure 8 and Figure 9 shown, a limiting step 24 is provided on the second connecting seat 21, and an abutting surface 65 capable of abutting against the limiting step 24 is provided on the armrest 6. When the child stroller frame is in the unfolded position, the limiting step 24 abuts against the abutting surface 65 to limit the position of the armrest 6 to ensure that the armrest 6 is held in the unfolded position.

[0042] As Figure 1 、 Figure 3 and Figure 12As shown, the linkage assembly 3 includes a first linkage rod 31, a second linkage rod 32, and a third linkage rod 33. One end of the first linkage rod 31 is hinged to the first support leg 11 about the seventh axis G, and the other end of the first linkage rod 31 is hinged to the second linkage rod 32 about the eighth axis H. The second linkage rod 32 is hinged to the second support leg 12 about the ninth axis I at the end far from the first linkage rod 31. The upper end of the third linkage rod 33 is hinged to the second connection seat 21 about the tenth axis J and is offset from the fourth axis D. The lower end of the third linkage rod 33 is hinged to the first linkage rod 31 or the second linkage rod 32 about the eighth axis H. When the push rod assembly 2 rotates and folds, the second connection seat 21 rotates relative to the first connection seat 14 about the fourth axis D. At this time, the position of the second connection seat 21 offset from the first axis D pulls up the third linkage rod 33 and rotates relative to the third linkage rod 33. The third linkage rod 33 pulls the connection position of the first linkage rod 31 and the second linkage rod 32 to move upward. The lower ends of the first linkage rod 31 and the second linkage rod 32 pull the first support leg 11 and the second support leg 12 to rotate and approach each other.

[0043] As Figure 11 and Figure 12 shown, the locking device includes a plurality of first locking grooves 71 provided on the first connection seat 14 in the circumferential direction, a plurality of second locking grooves 72 provided on the second connection seat 21 in the circumferential direction. A locking gear 73 capable of moving horizontally and engaging with the first locking groove 71 and the second locking groove 72 simultaneously is provided in the space enclosed by the first connection seat 14 and the second connection seat 21. An activity block 74 capable of rotating and moving horizontally when rotating to push the locking gear 73 to disengage from the second locking groove 72 is provided between the locking gear 73 and the second connection seat 21. A first return spring 75 capable of pushing the locking gear 73 to reset horizontally is further provided between the locking gear 73 and the first connection seat 14. When unlocking is required, the activity block 74 is rotated. During the rotation of the activity block 74, the locking gear 73 is pushed to move horizontally and disengage from the second locking groove 72. Once the locking gear 73 disengages from the second locking groove 72, at this time, the push rod assembly 2 can be pushed forward to make the second connection seat 21 rotate relative to the first connection seat 14, thereby realizing the folding of the child stroller frame. When the child stroller is in the unfolded position, the second locking groove 72 and the first locking groove 71 are simultaneously engaged with the locking gear 73, and the first return spring 75 provides a certain holding thrust to the locking gear 73, so as to keep the child stroller frame in the unfolded position. In this embodiment, the hand push rod 23 is slidably connected to the lower push rod 22. When folding the child stroller frame, the hand push rod 23 is first retracted deep into the lower push rod 22. A locking member (not shown in the figure) capable of locking the two is provided between the hand push rod 23 and the lower push rod 22. The locking member can adopt the engagement of a pin and a hole in the traditional structure, which will not be elaborated here.

[0044] As Figure 11 and Figure 12 shown, a sliding rod 76 that can be pushed by the hand push rod 23 when the hand push rod 23 contracts downward into the lower push rod 22 is provided inside the second connecting seat 21. A pushing portion 77 that can push the movable block 74 to rotate when the sliding rod 76 slides downward is provided at the lower end of the sliding rod 76. A plurality of inclined slots 78 are provided on the movable block 74 along the circumferential direction. An inclined protrusion 79 that cooperates with the inclined slots 78 and can push the movable block 74 to move laterally when the movable block 74 rotates is provided on the second connecting seat 21. A second return spring 70 that can push the sliding rod 76 to reset is also provided inside the second connecting seat 21. When the hand push rod 23 contracts downward to the deep part of the lower push rod 22, the lower end of the hand push rod 23 pushes the sliding rod 76 to slide downward. The pushing portion 77 at the lower end of the sliding rod 76 pushes the movable block 74 to rotate. The bottom of the inclined slot 78 on the movable block 74 relatively slides with the inclined protrusion 79 on the second connecting seat 21, and the inclined protrusion 79 pushes the movable block 74 to move laterally, thereby pushing the locking gear 73 to disengage from the second locking groove 72 to unlock. At this time, the push rod assembly 2 can be rotated to fold the child stroller frame.

[0045] The above has described this embodiment in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiment. Within the knowledge scope of those of ordinary skill in the technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A stroller frame that can be moved from an unfolded position to a folded position after the locking device is unlocked, characterized in that: Comprising a bottom support frame (1), the bottom support frame (1) includes a first support leg (11) and a second support leg (12). Wheels (13) are provided at the lower ends of both the first support leg (11) and the second support leg (12). A first connecting seat (14) is provided at the upper end of the first support leg (11). The upper end of the second support leg (12) is rotatably connected to the first connecting seat (14) about a first axis (A). The upper end of the bottom support frame (1) is rotatably connected to a push rod assembly (2). A linkage assembly (3) is provided between the push rod assembly (2) and the bottom support frame (1), which can drive the first support leg (11) and the second support leg (12) to rotate and approach each other when the push rod assembly (2) rotates and approaches the bottom support frame (1). The baby stroller frame further includes a seat frame (4). The seat frame (4) is rotatably connected to the first connecting seat (14) about a third axis (C). A transmission rod (5) is also provided between the seat frame (4) and the push rod assembly (2), which is hinged to both of them and can drive the seat frame (4) to rotate and approach the first support leg (11) when the push rod assembly (2) rotates and approaches the bottom support frame (1).

2. The stroller frame according to claim 1, characterized in that: The push rod assembly (2) includes a second connecting seat (21) rotatably connected to the first connecting seat (14) about a fourth axis (D). A lower push rod (22) is fixedly connected to the second connecting seat (21). A hand push rod (23) that can move relative to it is connected to the lower push rod (22).

3. The stroller frame according to claim 2, characterized in that: One end of the transmission rod (5) is hinged to the seat frame (4) about a fifth axis (E), and the other end is hinged to the second connecting seat (21) about a sixth axis (F).

4. The stroller frame according to claim 2 or 3, characterized in that: The seat frame (4) includes a seat rod (41) and an extension seat (42) fixed to the seat rod (41) and extending obliquely downward. The extension seat (42) is rotatably connected to the first connecting seat (14) about the third axis (C).

5. The stroller frame according to claim 2 or 3, characterized in that: It further includes an armrest (6). The armrest (6) is rotatably connected to the second connecting seat (21) about the sixth axis (F).

6. The stroller frame according to claim 5, wherein: The armrest (6) is rotatably connected to the transmission rod (5). A receiving groove (63) is provided on the armrest (6). The upper end of the transmission rod (5) extends into the receiving groove (63) and is hinged to the second connecting seat (21). The receiving groove (63) has a first side wall (61) and a second side wall (62). When the baby stroller frame is in the unfolded position, the first side wall (61) abuts against one side of the transmission rod (5) and the second side wall (62) abuts against the other side of the transmission rod (5) to position the armrest (6). The receiving groove (63) also has a third side wall (64). During the process of the baby stroller frame moving from the unfolded position to the folded position, the armrest (6) rotates relative to the transmission rod (5) to reach a position where the third side wall (64) abuts against the transmission rod (5).

7. The stroller frame according to claim 6, characterized in that: A limiting step (24) is provided on the second connecting seat (21) described above. An abutting surface (65) capable of abutting against the limiting step (24) is provided on the armrest (6). When the child stroller frame is in the unfolded position, the limiting step (24) abuts against the abutting surface (65).

8. The child stroller frame according to claim 2 or 3, characterized in that: The linkage assembly (3) includes a first linkage rod (31), a second linkage rod (32), and a third linkage rod (33). One end of the first linkage rod (31) is hinged to the first support leg (11) about the seventh axis (G). The other end of the first linkage rod (31) is hinged to the second linkage rod (32) about the eighth axis (H). The end of the second linkage rod (32) far from the first linkage rod (31) is hinged to the second support leg (12) about the ninth axis (I). The upper end of the third linkage rod (33) is hinged to the second connecting seat (21) about the tenth axis (J) and is offset from the fourth axis (D). The lower end of the third linkage rod (33) is hinged to the first linkage rod (31) or the second linkage rod (32) about the eighth axis (H).

9. The stroller frame according to claim 2, wherein: The locking device includes a plurality of first locking grooves (71) provided on the first connecting seat (14) along the circumferential direction. A plurality of second locking grooves (72) are provided on the second connecting seat (21) along the circumferential direction. A locking gear (73) capable of moving horizontally and engaging with the first locking grooves (71) and the second locking grooves (72) simultaneously is provided in the space enclosed by the first connecting seat (14) and the second connecting seat (21). An activity block (74) capable of rotating and moving horizontally when rotating to push the locking gear (73) away from the second locking groove (72) is provided between the locking gear (73) and the second connecting seat (21). A first return spring (75) capable of pushing the locking gear (73) to reset horizontally is further provided between the locking gear (73) and the first connecting seat (14).

10. The stroller frame according to claim 9, wherein: The hand push rod (23) is slidably connected to the lower push rod (22). A locking member capable of locking the two is provided between the hand push rod (23) and the lower push rod (22). A sliding rod (76) capable of being pushed by the hand push rod (23) when the hand push rod (23) contracts into the lower push rod (22) is provided in the second connecting seat (21). A pushing portion (77) capable of pushing the activity block (74) to rotate when sliding downward is provided at the lower end of the sliding rod (76). A plurality of inclined grooves (78) are provided on the activity block (74) along the circumferential direction. An inclined protrusion (79) cooperating with the inclined grooves (78) and capable of pushing the activity block (74) to move horizontally when the activity block (74) rotates is provided on the second connecting seat (21). A second return spring (70) capable of pushing the sliding rod (76) to reset is further provided in the second connecting seat (21).

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