Stroller frame

Abstract

The utility model discloses a child's pushchair framework, bottom support frame includes front leg and with the rear leg rotatable connection of front leg, and the lower extreme of front leg and rear leg is equipped with the wheel, and the upper end rotatable connection of bottom support frame has the support rod, and the upper end rotatable connection of support rod is close to the lower extreme position of hand push pole and is connected, and the transmission rod articulated with both is equipped between the lower extreme of hand push pole and rear leg, and the linkage rod articulated with both and can drive the traction assembly activity when transmission rod rotates folding or unfolding relative to rear leg is equipped between transmission rod and close to its lower extreme position and traction assembly, and the rear side rotatable connection of seat frame upper end and rear leg, and the connecting rod articulated with both and can drive seat frame relative to front leg close or unfold when traction assembly drives front leg and rear leg close or unfold is equipped between seat frame front side and traction assembly. The utility model discloses simple structure, and the nimble folding.

Description

[Technical Field]

[0001] This utility model relates to a children's stroller frame. [Background Technology]

[0002] With societal development, strollers have become an essential tool for infants and toddlers when traveling. Beyond the basic requirements of safety and sturdiness, parents are increasingly emphasizing features such as easy folding, compact size, and convenient storage. Therefore, most strollers now feature a folding mechanism, unfolding when in use and folding when not in use for convenient transport and to minimize space usage. Furthermore, the stroller designs on the market vary widely, with different folding principles.

[0003] This utility model provides a new implementation scheme that differs from the prior art. [Utility Model Content]

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a simple and flexible stroller frame.

[0005] This utility model is achieved through the following technical solution:

[0006] A stroller frame, movable from an unfolded position to a folded position after the locking device is unlocked, includes a bottom support frame. The bottom support frame includes front legs and a rear leg rotatably connected to the front legs about a first axis. Both the front and rear legs have wheels at their lower ends. A support rod is rotatably connected to the upper end of the bottom support frame about a second axis. The stroller frame also includes a push rod, with its lower end rotatably connected to the upper end of the support rod about a third axis. A transmission rod is hinged between the lower end of the push rod and the rear leg. A connection is provided between the front and rear legs. The stroller frame includes a traction component that can pull the two legs together or unfold when they move relative to each other. The transmission rod is connected to the traction component near its lower end and is hinged to both legs. When the transmission rod rotates and folds or unfolds relative to the rear leg, it can drive the traction component to move. The stroller frame also includes a seat frame. The rear side of the seat frame is rotatably connected to the upper end of the rear leg around a fourth axis. The front side of the seat frame is connected to the traction component and is hinged to both legs. When the traction component moves the front leg and the rear leg together or unfolds, it can drive the seat frame to move relative to the front leg or unfold.

[0007] The traction assembly includes a first traction rod and a second traction rod. The front end of the first traction rod is rotatably connected to the front leg around a fifth axis. The rear end of the first traction rod is rotatably connected to the front end of the second traction rod around a sixth axis. The rear end of the second traction rod is rotatably connected to the rear leg around a seventh axis. The upper end of the linkage rod is rotatably connected to the transmission rod around an eighth axis. The lower end of the linkage rod is rotatably connected to the second traction rod around a ninth axis. The upper end of the connecting rod is rotatably connected to the seat frame around a tenth axis. The lower end of the connecting rod is rotatably connected to the first traction rod around an eleventh axis.

[0008] The hind leg includes a hind leg rod, the upper end of which is fixedly connected to a connecting seat. The front leg is rotatably connected to one side of the connecting seat, and the support rod is rotatably connected to the other side of the connecting seat.

[0009] The stroller frame also includes a U-shaped armrest, a connecting sleeve that is rotatably connected to the support rod around the twelfth axis, the armrest passing through the connecting sleeve and being able to slide back and forth, and the rear end of the armrest being rotatably connected to the transmission rod around the thirteenth axis.

[0010] The upper end of the transmission rod is hinged to the lower end of the hand push rod around the fourteenth axis, and the lower end of the transmission rod is hinged to the rear leg around the fifteenth axis.

[0011] The seat frame is rotatably connected to a leg support frame at its front end. An adjustment structure is provided between the leg support frame and the seat frame to adjust the position of the leg support frame. The adjustment structure includes multiple first engagement slots on the seat frame along the circumferential direction, and multiple second engagement slots on the leg support frame along the circumferential direction. A gear is provided within the space formed by the seat frame and the leg support frame, capable of lateral movement and engaging with both the first and second engagement slots simultaneously. An operating component is provided on the leg support frame to pull the gear away from the first engagement slots. A first return spring is also provided between the gear and the leg support frame to push the gear to its reset position.

[0012] The leg support frame is provided with a fixed seat. The operating component includes an operating block that is mounted on the fixed seat and can slide relative to it. A first pull rope is provided between the operating block and the gear, which can pull the gear to disengage from the first engagement groove when the operating block slides. A second return spring is provided between the operating block and the fixed seat, which can push the operating block to slide back to its original position.

[0013] The fixed base is provided with a guide groove, and the operating block is provided with a guide post that is inserted into the guide groove.

[0014] The locking device includes a first connecting shell mounted on a push rod, the first connecting shell having multiple first slots along its circumference; a second connecting shell mounted on the upper end of the support rod, the second connecting shell having multiple second slots along its circumference; a spline that can slide within the space enclosed by the first and second connecting shells and can simultaneously engage with the first and second slots; a movable block that can push the spline away from the first slots when rotated between the spline and the first connecting shell; an operating element mounted on the upper end of the push rod; a second pull rope that can pull the movable block to rotate between the operating element and the movable block; and a third return spring that can push the spline to move and reset between the spline and the second connecting shell.

[0015] The first connecting shell has multiple oblique protrusions along the circumferential direction, and the movable block has oblique grooves that cooperate with the oblique protrusions.

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

[0017] 1. When folding, the push rod rotates forward relative to the support rod, causing the lower end of the support rod to rotate relative to the bottom support frame. The lower end of the push rod moves downward and rotates relative to the transmission rod, while the lower end of the transmission rod rotates relative to the rear leg. During this process, the linkage rod pushes the traction component to move, which in turn pulls the front and rear legs to rotate relative to each other and move closer together. Furthermore, the traction component, through the connecting rod, also pulls the seat frame to rotate relative to the rear leg and move closer to the front leg, thus achieving the folding of the stroller frame. The entire stroller frame has a simple structure, is easy to fold, and is flexible in its operation.

[0018] 2. During the folding process of this utility model, as the transmission rod rotates relative to the rear leg and moves closer to it, the transmission rod pushes the linkage rod, which in turn pushes the second traction rod to rotate downwards relative to the rear leg. The second traction rod then drives the first traction rod to rotate relative to the front leg, and the connection point between the first and second traction rods moves downwards. This, in turn, pulls the front and rear legs closer together. As the first traction rod rotates downwards relative to the front leg, it also pulls the connecting rod downwards. The connecting rod then pulls the front side of the seat frame, causing the rear side of the seat frame to rotate relative to the rear leg, thus folding the seat frame as well. The entire linkage mechanism is ingeniously designed, enabling the stroller frame to fold flexibly.

[0019] 3. The support rod of this utility model is rotatably connected to a connecting sleeve. The handrail passes through the connecting sleeve and can slide within it. Moreover, the rear end of the handrail is rotatably connected to the transmission rod. Therefore, when the transmission rod rotates and folds relative to the rear leg, the transmission rod pulls the handrail to slide within the connecting sleeve, causing the connecting sleeve to rotate relative to the support rod. Finally, the handrail moves backward and closes to the support rod, so that when the stroller frame is unfolded, the handrail can extend forward for the child to grasp. When the stroller is folded, the handrail moves backward without protruding excessively forward, thereby reducing the folded volume and space occupied.

[0020] 4. When folding, this invention allows the push rod to rotate forward, and the relative rotation of the components is achieved under the weight of the push rod and support rod, thus achieving automatic folding. That is, once the unlocking device is unlocked and the push rod is slightly rotated, the stroller frame will automatically move into the folded state, even if the handle is released at this point, which is very convenient and quick. Furthermore, in the folded state, the lower end of the push rod and the wheels form a support point on the ground, keeping the stroller frame upright for easy storage. [Attached Image Description]

[0021] Figure 1 This is a perspective view of the utility model;

[0022] Figure 2 This is a side view of the utility model in its unfolded state;

[0023] Figure 3 This is one of the side views during the folding process of this utility model;

[0024] Figure 4 This is the second side view of the present invention during the folding process;

[0025] Figure 5 This is the third side view of the present invention during the folding process;

[0026] Figure 6 This is a side view of the present invention in its folded state;

[0027] Figure 7 This is one of the exploded views of the components of this utility model;

[0028] Figure 8 This is the second exploded view of a component of this utility model;

[0029] Figure 9 This is the third exploded view of the component of this utility model.

Detailed Implementation Methods

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1 to 6As shown, the stroller frame can move from the unfolded position to the folded position after the locking device is unlocked. In the unfolded position, the stroller frame can be used for sitting, while in the folded position, it is convenient for storage or carrying. This stroller frame has a multi-link linkage folding structure, which enables rapid folding through the coordinated movement of various components, significantly reducing the storage volume.

[0032] like Figures 1 to 6 As shown, the stroller frame in this embodiment includes a bottom support frame 1, which includes a front leg 11 and a rear leg 12 rotatably connected to the front leg 11 around a first axis A. Both the front leg 11 and the rear leg 12 are provided with wheels 13 at their lower ends. The upper end of the bottom support frame 1 is rotatably connected to a support rod 2 around a second axis B. The stroller frame also includes a push rod 3. The push rod 3 is rotatably connected to the upper end of the support rod 2 around a third axis C near its lower end. A transmission rod 4 is provided between the lower end of the push rod 3 and the rear leg 12, which is hinged to both. A traction component 5 is provided between the front leg 11 and the rear leg 12, which can pull the two closer together or unfold when they move relative to each other. A linkage rod 6 is provided between the transmission rod 4 and the traction component 5, which is hinged to both and can drive the traction component 5 to move when the transmission rod 4 rotates, folds or unfolds relative to the rear leg 12. When folding, the push rod 3 rotates forward relative to the support rod 2, and the lower end of the support rod 2 rotates relative to the bottom support frame 1. Under the weight of the support rod 2 and the push rod 3, the lower end of the push rod 3 moves downward and rotates relative to the transmission rod 4. The lower end of the transmission rod 4 rotates relative to the rear leg 12. During this process, the linkage rod 6 pushes the traction component 5 to move, and the traction component 5 pulls the front leg 11 and the rear leg 12 to rotate relative to each other and move closer. As the push rod 3, support rod 2, and transmission rod 4 rotate and move closer to the rear leg 12, the front leg 11 also rotates and moves closer to the rear leg 12, achieving linkage. The same principle applies when the stroller frame unfolds.

[0033] like Figures 1 to 6As shown, the stroller frame also includes a seat frame 7, which supports the seat for a child to sit on. The rear side of the seat frame 7 is rotatably connected to the upper end of the rear leg 12 around the fourth axis D. A connecting rod 8 is provided between the front side of the seat frame 7 and the traction assembly 5, hinged to both, and capable of moving the seat frame 7 relative to the front leg 11 when the traction assembly 5 moves the front leg 11 and rear leg 12 closer together or further apart. During the process of the traction assembly 5 moving the front leg 11 and rear leg 12 closer together or further apart, the traction assembly 5 moves the connecting rod 8, which in turn moves the front side of the seat frame 7, causing the seat frame 7 to rotate relative to the rear leg 12. This allows the seat frame 7 to move closer to or further apart relative to the front leg 11, achieving a linkage between the seat frame 7 and the rear leg 12. When folding the entire stroller frame, simply unlocking the locking device and rotating the push rod 3 forward relative to the support rod 2 will automatically fold the frame. The folding operation is very convenient, quick, and flexible.

[0034] like Figures 1 to 6 As shown, the traction assembly 5 includes a first traction rod 51 and a second traction rod 52. The front end of the first traction rod 51 is rotatably connected to the front leg 11 around the fifth axis E. The rear end of the first traction rod 51 is rotatably connected to the front end of the second traction rod 52 around the sixth axis F. The rear end of the second traction rod 52 is rotatably connected to the rear leg 12 around the seventh axis G. The upper end of the linkage rod 6 is rotatably connected to the transmission rod 4 around the eighth axis H. The lower end of the linkage rod 6 is rotatably connected to the second traction rod 52 around the ninth axis I. The upper end of the connecting rod 8 is rotatably connected to the seat frame 7 around the tenth axis J. The lower end of the connecting rod 8 is rotatably connected to the first traction rod 51 around the eleventh axis K. During the folding process, as the transmission rod 4 rotates relative to the rear leg 12 and moves closer to it, the transmission rod 4 pushes the linkage rod 6. The linkage rod 6 then pushes the second traction rod 52 to rotate downward relative to the rear leg 12. The second traction rod 52 then drives the first traction rod 51 to rotate relative to the front leg 11, and the joint position of the first traction rod 51 and the second traction rod 52 moves downward. Thus, the first traction rod 51 and the second traction rod 52 pull the front leg 11 and the rear leg 12 closer together. As the first traction rod 51 rotates downward relative to the front leg 11, it also pulls the connecting rod 8 downward. The connecting rod 8 then pulls the front side of the seat frame 7, causing the rear side of the seat frame 7 to rotate relative to the rear leg 12, thereby causing the seat frame 7 to fold as well. The entire linkage mechanism is cleverly designed, enabling the stroller frame to fold flexibly.

[0035] like Figure 1 and Figure 2As shown, the rear leg 12 includes a rear leg rod 121, and a connecting seat 122 is fixedly connected to the upper end of the rear leg rod 121. The front leg 11 is rotatably connected to one side of the connecting seat 122, and the support rod 2 is rotatably connected to the other side of the connecting seat 122, so that the stroller frame can be flexibly unfolded or folded, and the structure is simple and compact.

[0036] like Figures 1 to 5 As shown, the stroller frame also includes a U-shaped handlebar 91. A connecting sleeve 92 is rotatably connected to the support rod 2 around the twelfth axis L. The handlebar 91 passes through the connecting sleeve 92 and can slide back and forth. The rear end of the handlebar 91 is rotatably connected to the transmission rod 4 around the thirteenth axis M. When the transmission rod 4 rotates and folds relative to the rear leg 12, the transmission rod 4 pulls the handlebar 91 to slide within the connecting sleeve 92, causing the connecting sleeve 92 to rotate relative to the support rod 2. Finally, the handlebar 91 moves backward and closes to the support rod 2, so that when the stroller frame is unfolded, the handlebar 91 can extend forward for the child to grasp. When the stroller is folded, the handlebar 91 moves backward without protruding excessively forward, thereby reducing the folded volume and space occupied.

[0037] like Figures 1 to 5 As shown, the upper end of the transmission rod 4 is hinged to the lower end of the push rod 3 around the fourteenth axis N, and the lower end of the transmission rod 4 is hinged to the rear leg 12 around the fifteenth axis P.

[0038] like Figure 1 and Figure 9As shown, a leg support frame 10 is rotatably connected to the front end of the seat frame 7. The leg support frame 10 supports the child's legs to ensure comfort. An adjustment structure is provided between the leg support frame 10 and the seat frame 7 to adjust the position of the leg support frame 10, allowing it to be adjusted to a suitable position for the child's comfort. The adjustment structure includes multiple first engagement slots 101 arranged circumferentially on the seat frame 7, and multiple second engagement slots (not shown) arranged circumferentially on the leg support frame 10. A gear 102, capable of lateral movement within the space formed by the seat frame 7 and the leg support frame 10, engages simultaneously with the first and second engagement slots. An operating component 103 on the leg support frame 10 disengages the gear 102 from the first engagement slots 101. A first return spring 104 is provided between the legs 10 and the gear 102, which can push the gear 102 to move and reset. A fixed seat 105 is provided on the leg support frame 10. The operating component includes an operating block 106 that is provided on the fixed seat 105 and can slide relative to it. A first pull rope 107 is provided between the operating block 106 and the gear 102, which can pull the gear 102 to disengage from the first engagement groove 101 when the operating block 106 slides. A second return spring 108 is provided between the operating block 106 and the fixed seat 105, which can push the operating block 106 to slide and reset. When the position of the leg support frame 10 needs to be adjusted, the operating block 106 is slid, thereby pulling the gear 102 out of the first engagement groove 101 via the first pull rope 107. At this time, the leg support frame 10 can be rotated. When the position is adjusted to a suitable position, the operating block 106 is released, the second return spring 108 pushes the operating block 106 to reset, and the first return spring 104 pushes the gear 102 to reset, so that the gear 102 engages with the first engagement groove 101 and the second engagement groove at the same time to lock the position of the leg support frame 10.

[0039] like Figure 9 As shown, the fixed base 105 is provided with a guide groove 100, and the operating block 106 is provided with a guide post 109 that is inserted into the guide groove 100, so that the operating block 106 slides smoothly and steadily.

[0040] like Figure 7 and Figure 8As shown, the locking device includes a first connecting shell 31 mounted on the push rod 3. The first connecting shell 31 has multiple first slots 201 along its circumference. The upper end of the support rod 2 has a second connecting shell 22, which has multiple second slots 202 along its circumference. A spline 203, capable of sliding within the space enclosed by the first connecting shell 31 and the second connecting shell 22, and simultaneously engaging with the first and second slots 201 and 202, is provided. A connection is provided between the spline 203 and the first connecting shell 31. When rotated, a movable block 204 can push the spline 203 to disengage from the first slot 201. The upper end of the push rod 3 is provided with an operating element 205. A second pull rope 206 that can pull the movable block 204 to rotate is provided between the operating element 205 and the movable block 204. A third return spring 207 that can push the spline 203 to move and reset is provided between the spline 203 and the second connecting shell 22. The first connecting shell 31 is provided with a plurality of oblique protrusions 208 along the circumferential direction. The movable block 204 is provided with an oblique groove 209 that cooperates with the oblique protrusions 208. During unlocking, pressing the control element 205 causes it to pull the movable block 204 to rotate via the second pull cord 206. The inclined groove 209 on the movable block 204 then slides relative to the inclined protrusion 208 on the first connecting shell 31. The inclined protrusion 208 pushes the movable block 204 to move laterally, causing the movable block 204 to disengage the spline 203 from the first slot 201. At this point, the locking device is unlocked, allowing the stroller frame to be folded. Of course, the locking device can also employ a traditional pin and socket locking structure, which will not be elaborated upon here.

[0041] When the frame of this children's stroller is folded, the locking device is unlocked and the push lever 3 is turned forward to achieve automatic folding. Folding is very convenient and quick, and the stroller can stand on the ground after folding. The folded size is also very small, making it easy to store or carry.

[0042] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller frame that can move from an unfolded position to a folded position after the locking device is unlocked, characterized in that: The stroller includes a bottom support frame (1), which includes a front leg (11) and a rear leg (12) rotatably connected to the front leg (11) around a first axis (A). Both the front leg (11) and the rear leg (12) have wheels (13) at their lower ends. A support rod (2) is rotatably connected to the upper end of the bottom support frame (1) around a second axis (B). The stroller frame also includes a push rod (3), which is rotatably connected to the upper end of the support rod (2) around a third axis (C) near its lower end. A transmission rod (4) is hinged between the lower end of the push rod (3) and the rear leg (12). A transmission rod (4) is provided between the front leg (11) and the rear leg (12) to allow movement between them. The stroller frame includes a traction component (5) that can pull the two together or unfold. The transmission rod (4) is provided with a linkage rod (6) that is hinged to the two and can drive the traction component (5) to move when the transmission rod (4) rotates and folds or unfolds relative to the rear leg (12). The stroller frame also includes a seat frame (7). The rear side of the seat frame (7) is rotatably connected to the upper end of the rear leg (12) around the fourth axis (D). The front side of the seat frame (7) is provided with a connecting rod (8) that is hinged to the two and can drive the seat frame (7) to move relative to the front leg (11) when the traction component (5) drives the front leg (11) and the rear leg (12) to move together or unfold.

2. The stroller frame according to claim 1, characterized in that: The traction assembly (5) includes a first traction rod (51) and a second traction rod (52). The front end of the first traction rod (51) is rotatably connected to the front leg (11) around the fifth axis (E). The rear end of the first traction rod (51) is rotatably connected to the front end of the second traction rod (52) around the sixth axis (F). The rear end of the second traction rod (52) is rotatably connected to the rear leg (12) around the seventh axis (G). The upper end of the linkage rod (6) is rotatably connected to the transmission rod (4) around the eighth axis (H). The lower end of the linkage rod (6) is rotatably connected to the second traction rod (52) around the ninth axis (I). The upper end of the connecting rod (8) is rotatably connected to the seat frame (7) around the tenth axis (J). The lower end of the connecting rod (8) is rotatably connected to the first traction rod (51) around the eleventh axis (K).

3. The stroller frame according to claim 1, characterized in that: The hind leg (12) includes a hind leg rod (121), and a connecting seat (122) is fixedly connected to the upper end of the hind leg rod (121). The front leg (11) is rotatably connected to one side of the connecting seat (122), and the support rod (2) is rotatably connected to the other side of the connecting seat (122).

4. The stroller frame according to claim 1, characterized in that: The stroller frame also includes a U-shaped handlebar (91), and a connecting sleeve (92) is rotatably connected to the support rod (2) around the twelfth axis (L). The handlebar (91) passes through the connecting sleeve (92) and can slide back and forth. The rear end of the handlebar (91) is rotatably connected to the transmission rod (4) around the thirteenth axis (M).

5. The stroller frame according to claim 1, characterized in that: The upper end of the transmission rod (4) is hinged to the lower end of the push rod (3) around the fourteenth axis (N), and the lower end of the transmission rod (4) is hinged to the rear leg (12) around the fifteenth axis (P).

6. The stroller frame according to claim 1, characterized in that: The seat frame (7) is rotatably connected to a leg support frame (10) at its front end. The leg support frame (10) and the seat frame (7) are provided with an adjustment structure that can adjust the stopping position of the leg support frame (10). The adjustment structure includes a plurality of first engagement slots (101) arranged along the circumferential direction on the seat frame (7). The leg support frame (10) is provided with a plurality of second engagement slots arranged along the circumferential direction. The space enclosed by the seat frame (7) and the leg support frame (10) is provided with a gear (102) that can move laterally within it and engage with the first engagement slots (101) and the second engagement slots simultaneously. The leg support frame (10) is provided with an operating component (103) that can pull the gear (102) to disengage from the first engagement slot (101). A first return spring (104) that can push the gear (102) to move and reset is also provided between the gear (102) and the leg support frame (10).

7. The stroller frame according to claim 6, characterized in that: The leg support frame (10) is provided with a fixed seat (105). The operating component (103) includes an operating block (106) that is provided on the fixed seat (105) and can slide relative to it. A first pull rope (107) is provided between the operating block (106) and the gear (102) to pull the gear (102) to disengage from the first engagement groove (101) when the operating block (106) slides. A second return spring (108) is provided between the operating block (106) and the fixed seat (105) to push the operating block (106) to slide back to its original position.

8. The stroller frame according to claim 7, characterized in that: The fixed base (105) is provided with a guide groove (100), and the operating block (106) is provided with a guide post (109) that is inserted into the guide groove (100).

9. The stroller frame according to any one of claims 1 to 8, characterized in that: The locking device includes a first connecting shell (31) mounted on the push rod (3), the first connecting shell (31) having a plurality of first slots (201) along the circumferential direction, a second connecting shell (22) mounted on the upper end of the support rod (2), the second connecting shell (22) having a plurality of second slots (202) along the circumferential direction, and a spline (20) that can slide within the space enclosed by the first connecting shell (31) and the second connecting shell (22) and can simultaneously engage with the first slots (201) and the second slots (202) is provided. 3) A movable block (204) is provided between the spline (203) and the first connecting shell (31) to push the spline (203) to disengage from the first slot (201) when rotating. An operating element (205) is provided at the upper end of the push rod (3). A second pull rope (206) is provided between the operating element (205) and the movable block (204) to pull the movable block (204) to rotate. A third return spring (207) is provided between the spline (203) and the second connecting shell (22) to push the spline (203) to move and reset.

10. The stroller frame according to claim 9, characterized in that: The first connecting shell (31) is provided with a plurality of oblique protrusions (208) along the circumferential direction, and the movable block (204) is provided with oblique grooves (209) that cooperate with the oblique protrusions (208).

Images