Stroller frame

Abstract

The utility model discloses a child's shallow skeleton, can be converted from the unfolded state into the folding state after the locking device is unlocked, including the front support pole, the front support pole lower extreme is equipped with the front wheel, the front support pole upper end is equipped with the fixed seat fixedly, the fixed seat is equipped with the passageway, the passageway is equipped with the support pole in it can slide, the support pole lower end is equipped with the connecting seat fixedly, the connecting seat is connected with the rear support pole around the first axis line rotation, the rear support pole lower end is equipped with the rear wheel, the fixed seat with the rear support pole middle part between is equipped with the linkage link with both rotation connection, the connecting seat is still connected with the seat support frame around the second axis line rotation, the seat support frame back side with the rear support pole between still is equipped with the transmission link with both rotation connection. 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] Strollers are a common product during a child's growth. Most current strollers can be unfolded or folded; when unfolded, they provide a comfortable ride for children, while when folded, they are easy to carry or store. However, the structures and folding principles of stroller frames vary widely on the market. Therefore, this invention provides a novel stroller frame that differs from existing ones. [Utility Model Content]

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a simple and flexible stroller frame.

[0004] This utility model is achieved through the following technical solution:

[0005] The stroller frame can be converted from an unfolded state to a folded state after the locking device is unlocked. It includes a front support rod, with a front wheel at the lower end of the front support rod and a fixed seat at the upper end of the front support rod. The fixed seat has a channel, and a support rod that can slide within the channel is located therein. A connecting seat is fixed at the lower end of the support rod, and a rear support rod is rotatably connected to the connecting seat around a first axis. The lower end of the rear support rod has a rear wheel. A linkage rod that rotatably connects the fixed seat and the rear support rod is located between the middle of the fixed seat and the rear support rod. A seat support frame is also rotatably connected to the connecting seat around a second axis. A transmission rod that rotatably connects the rear side of the seat support frame and the rear support rod is also located between the rear side of the seat support frame and the rear support rod.

[0006] The connecting seat includes a seat body and a sleeve integrally formed with the seat body. The sleeve is fitted onto the front support rod and can slide along the front support rod. The seat support frame is rotatably connected to the inner side of the sleeve about the second axis. The rear support rod includes a rear rod body and a connecting body fixed to the upper end of the rear rod body. The connecting body is rotatably connected to the seat body about the first axis.

[0007] The seat body has an arc-shaped hole along the circumference, and the connecting body has a connecting shaft that passes through the arc-shaped hole laterally and can move within the arc-shaped hole. The lower end of the transmission rod is rotatably connected to the connecting shaft around a third axis, and the upper end of the transmission rod is rotatably connected to the rear side of the seat support frame around a fourth axis. The third axis is offset from the first axis and the two are parallel to each other.

[0008] The transmission rod includes a straight rod segment extending along the front-rear direction of the seat support frame. The rear end of the straight rod segment is rotatably connected to the seat support frame. The front end of the straight rod segment is connected to a first bent segment integrally formed therewith and bent relative to it. The lower end of the first bent segment is connected to a second bent segment integrally formed therewith and bent relative to it. The second bent segment is connected to a curved segment integrally formed therewith. The lower end of the curved segment is rotatably connected to a connecting shaft.

[0009] The upper end of the support rod is connected to a push rod that can rotate, unfold, or fold relative to it.

[0010] The locking device includes a first locking mechanism disposed between the fixed base and the support rod and a second locking mechanism disposed between the support rod and the push rod. The push rod is provided with a first unlocking component for unlocking the second locking mechanism. A linkage unlocking component is provided between the push rod and the first locking mechanism, which can drive the first locking mechanism to unlock when the push rod rotates and folds relative to the support rod.

[0011] The first locking mechanism includes a locking hole on the side wall of the fixed base, a fixed rod is fixedly installed inside the support rod, a locking block that can engage or disengage from the locking hole is slidably installed inside the fixed rod, a first reset spring that can push the locking block to reset is also provided between the fixed rod and the locking block, and the linkage unlocking component is connected to the locking block and can drive the locking block to disengage from the locking hole.

[0012] The support rod has a first joint housing at its upper end and a second joint housing at its lower end. The second locking mechanism includes multiple first slots on the first joint housing along the circumferential direction and multiple second slots on the second joint housing along the circumferential direction. A spline that can simultaneously engage with the first and second slots is slidably provided inside the first and second joint housings. A movable block that can move laterally during rotation and push the spline away from the second slot is provided between the spline and the second joint housing. Multiple oblique grooves are provided on the movable block along the circumferential direction. An oblique protrusion that cooperates with the oblique grooves and can push the movable block to move laterally when the movable block rotates is provided on the second joint housing. The movable block is connected to a first unlocking member. A second return spring that can push the spline to slide back to its original position is provided between the spline and the first joint housing.

[0013] The linkage unlocking component includes a sliding rod that can slide within the fixed rod. The sliding rod contacts the locking block via an inclined surface, causing the locking block to disengage from the locking hole when the sliding rod slides upward. The support rod has a movable rod that can move within it in the middle. A first pull rope connects the upper end of the sliding rod and the lower end of the movable rod. A third return spring that can push the sliding rod back to its original position is provided between the sliding rod and the fixed rod. A sliding block that can slide relative to the movable rod is provided inside it. A second pull rope that can pull the sliding block to slide when the push rod rotates and folds relative to the support rod is provided between the sliding block and the push rod. A fourth return spring that can push the sliding block back to its original position is provided between the sliding block and the movable rod.

[0014] The first unlocking component includes an operating block located at the upper end of the push rod, and a third pull rope that can pull the movable block to rotate is provided between the operating block and the movable block.

[0015] Compared with existing technologies, this invention has the following advantages: When folded, the support rod slides downward within the channel, while the lower end of the support rod and the upper end of the rear support rod move closer to the lower end of the front support rod. During this process, the linkage rod rotates relative to the fixed seat and the rear support rod, and the rear support rod also rotates relative to the connecting seat at the lower end of the support rod, causing the support rod to move closer to the rear support rod. Furthermore, as the support rod slides downward, the front side of the seat support frame also rotates relative to the connecting seat, and the transmission rod connected to the rear side of the seat support frame rotates relative to the seat support frame and the rear support rod, causing the seat support frame to also move closer to the rear support rod, thus achieving the folding of the entire stroller frame. The entire stroller frame has a simple and compact structure, folds smoothly and flexibly, occupies little space after folding, and is suitable for widespread application. [Attached Image Description]

[0016] Figure 1 This is one of the perspective views of this utility model;

[0017] Figure 2 This is the second perspective view of this utility model;

[0018] Figure 3 yes Figure 2 A magnified view at point E in the middle;

[0019] Figure 4 This is a side view of the utility model in its unfolded state;

[0020] Figure 5 This is a perspective view of the folding process of this utility model;

[0021] Figure 6 This is a side view of the present invention during the folding process;

[0022] Figure 7 This is a partial cross-sectional view of the folding process of this utility model;

[0023] Figure 8 This is a side view of the folded state of this utility model;

[0024] Figure 9 This is a partial cross-sectional view of the present invention in its unfolded state;

[0025] Figure 10 This is one of the exploded views of the components of this utility model;

[0026] Figure 11 This is the second exploded view of a component of this utility model.

Detailed Implementation Methods

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] like Figure 1 and Figure 8 As shown, the stroller frame in this embodiment can be converted from an unfolded state to a folded state after the locking device is unlocked. In the unfolded state, the stroller frame can be used for children to ride in, while in the folded state, it is convenient for users to store or carry.

[0029] like Figures 1 to 11 As shown, the stroller frame includes a front support rod 1 with a front wheel 1a mounted at its lower end and a fixed seat 11 at its upper end. The fixed seat 11 has a channel 12, within which a support rod 2 can slide smoothly. A connecting seat 21 is fixedly connected to the lower end of the support rod 2. The connecting seat 21 includes a seat body 211 and an integrally formed sleeve 212. The sleeve 212 is fitted onto the front support rod 1 and can slide along it. This structural design not only enhances the overall stability of the stroller frame but also ensures smooth sliding of the support rod 2 relative to the front support rod 1 during folding. A rear support rod 3 is rotatably connected to the connecting seat 21. Specifically, the rear support rod 3 includes a rear rod body 31 and a connecting body 32 fixedly mounted on the upper end of the rear rod body 31. The connecting body 32 is rotatably connected to the seat body 211 around a first axis A. A rear wheel 3a is located at the lower end of the rear support rod 3. The seat 211 has an arc-shaped hole 213 along its circumference, and the connecting body 32 has a connecting shaft 33 that passes laterally through the arc-shaped hole 213 and can move within it. This not only limits the rotation range of the rear support rod 3, but also improves the stability of the folding process. A linkage rod 4 is provided between the fixed seat 11 and the middle of the rear support rod 3, rotating around both. The upper end of the linkage rod 4 is rotatably connected to the fixed seat 11 around the sixth axis F, and its lower end is rotatably connected to the middle of the rear rod body 31 around the seventh axis G. Thus, when the support rod 2 slides downwards, the linkage rod 4 rotates relative to the fixed seat 11 and the rear support rod 3, guiding the reasonable movement of the rear support rod 3 and ensuring that the folding action of the rear support rod 3 is controlled.

[0030] like Figures 1 to 11As shown, the stroller also includes a seat support frame 5, which supports the child. The front side of the seat support frame 5 is rotatably connected to the inner side of the sleeve 212 of the connecting seat 21 about the second axis B. A transmission rod 6 is also provided between the rear side of the seat support frame 5 and the rear support rod 3, and is rotatably connected to both. More specifically, the lower end of the transmission rod 6 is rotatably connected to the connecting shaft 33 about the third axis C, and the upper end of the transmission rod 6 is rotatably connected to the rear side of the seat support frame 5 about the fourth axis D. The third axis C is offset from the first axis A and the two are parallel to each other. This offset design allows the transmission rod 6 to rotate relative to the connecting body 32 and the seat support frame 5 when the support rod 2 slides downward and drives the rear support rod 3 to move, so that the seat support frame 5 of the stroller frame can also be folded smoothly.

[0031] like Figure 10 As shown, the transmission rod 6 includes a straight rod segment 61 extending along the front-rear direction of the seat support frame 5. The rear end of the straight rod segment 61 is rotatably connected to the seat support frame 5. The front end of the straight rod segment 61 is connected to a first bent segment 62 integrally formed with it and bent relative to it. The lower end of the first bent segment 62 is connected to a second bent segment 63 integrally formed with it and bent relative to it. A curved segment 64 integrally formed with it is connected to the second bent segment 63. The lower end of the curved segment 64 is rotatably connected to the connecting shaft 33. The integrally formed bent structure of the transmission rod 6 enhances the rigidity of the rod and guides the seat support frame 5 to retract smoothly during folding.

[0032] like Figure 1 and Figure 6 As shown, the upper end of the support rod 2 is connected to a push rod 7 that can rotate and unfold or fold relative to it. The push rod 7 extends the support rod 2, making it easier for the user to push. When the stroller frame needs to be folded, the push rod 7 is first rotated to move closer to the support rod 2, and then the support rod 2 is pushed down to slide.

[0033] like Figure 1 as well as Figures 9 to 11As shown, the locking device includes a first locking mechanism 81 located between the fixed base 11 and the support rod 2, and a second locking mechanism 82 located between the support rod 2 and the push rod 7. The push rod 7 is provided with a first unlocking element 83 for unlocking the second locking mechanism 82. A linkage unlocking element 84 is provided between the push rod 7 and the first locking mechanism 81, which can unlock the first locking mechanism 81 when the push rod 7 rotates and folds relative to the support rod 2. When the stroller frame is folded, the second locking mechanism 82 is unlocked first through the first unlocking element 83, so that the push rod 7 can rotate and fold relative to the support rod 2. During the rotation of the push rod 7, the first locking mechanism 81 is unlocked through the linkage unlocking element 84, so that the support rod 2 can slide downward. Multiple positions can be unlocked by simply operating the first unlocking element 83, making the folding of the stroller frame convenient and quick.

[0034] like Figures 9 to 11 As shown, the upper end of the support rod 2 is provided with a first joint housing 23, and the lower end of the push rod 7 is provided with a second joint housing 72. The second locking mechanism 82 includes a plurality of first slots 821 arranged along the circumferential direction on the first joint housing 23, and a plurality of second slots 822 arranged along the circumferential direction on the second joint housing 72. A spline 823 that can simultaneously engage with the first slots 821 and the second slots 822 is slidably provided in the first joint housing 23 and the second joint housing 72. A movable block 8 is provided between the spline 823 and the second joint housing 72, which can move laterally during rotation to push the spline 823 out of the second slots 822. 24. The movable block 824 is provided with a plurality of inclined grooves 825 along the circumferential direction. The second joint shell 72 is provided with inclined protrusions 826 that cooperate with the inclined grooves 825 and can push the movable block 824 to move laterally when the movable block 824 rotates. The movable block 824 is connected to the first unlocking member 83. A second return spring 827 that can push the spline 823 to slide back to its original position is provided between the spline 823 and the first joint shell 23. The first unlocking member 83 includes an operating block 831 provided at the upper end of the push rod 7. A third pull rope 832 that can pull the movable block 824 to rotate is provided between the operating block 831 and the movable block 824. When the operating block 831 is pressed, the operating block 831 pulls the third pull rope 832, which causes the movable block 824 to rotate. During the rotation, the inclined groove 825 on the movable block 824 cooperates with the inclined protrusion 826. The inclined protrusion 826 pushes the bottom of the inclined groove 825, causing the movable block 824 to move laterally and push the spline 823 to disengage from the second slot 822. At this time, the second locking mechanism 82 is unlocked, and the push rod 7 can rotate and fold relative to the support rod 2.

[0035] like Figures 9 to 11As shown, the first locking mechanism 81 includes a locking hole 811 on the side wall of the fixed base 11. A fixed rod 22 is fixedly installed inside the support rod 2. A locking block 812 that can engage or disengage from the locking hole 811 is slidably installed inside the fixed rod 22. A first return spring 813 that can push the locking block 812 back to its original position is also provided between the fixed rod 22 and the locking block 812. The linkage unlocking member 84 is connected to the locking block 812 and can drive the locking block 812 to disengage from the locking hole 811. In the locked state, the locking block 812 engages with the locking hole 811. When the push rod 7 rotates and folds relative to the support rod 2, the linkage unlocking member 84 drives the locking block 812 to disengage from the locking hole 811.

[0036] like Figures 9 to 11As shown, the linkage unlocking component 84 includes a sliding rod 841 that can slide within the fixed rod 22. The sliding rod 841 contacts the locking block 812 via an inclined surface, so that when the sliding rod 841 slides upward, it can drive the locking block 812 to disengage from the locking hole 811. The support rod 2 has a movable rod 842 in its middle that can move within it. A first pull rope 843 connecting the upper end of the sliding rod 841 and the lower end of the movable rod 842 is provided. A pushable mechanism is provided between the sliding rod 841 and the fixed rod 22. The movable sliding rod 841 is reset by a third return spring 844. The movable rod 842 is provided with a sliding block 845 that can slide relative to it. A second pull rope 846 is provided between the sliding block 845 and the push rod 7, which can pull the sliding block 845 to slide when the push rod 7 rotates and folds relative to the support rod 2. The upper end of the second pull rope 846 is connected to the eccentric position of the second joint housing 72. A fourth return spring 847 is provided between the sliding block 845 and the movable rod 842, which can push the sliding block 845 to reset. When the second locking mechanism 82 is unlocked and the push rod 7 rotates and folds relative to the support rod 2, the push rod 7 pulls the second pull rope 846 through the second joint housing 72. The second pull rope 846 then pulls the sliding block 845 upward, which in turn compresses the fourth return spring 847. In the initial stage of the upward movement of the sliding block 845, the movable rod 842 is in a stopped state. Until the sliding block 845 compresses the fourth return spring 847 to its limit position and continues to be pulled upward by the second pull rope 846, the sliding block 845 pushes the fourth return spring 847 to drive the movable rod 842 upward. The first pull rope 843 then pulls the sliding rod 841 upward. The sliding rod 841 then drives the locking block 812 to disengage from the locking hole 811 through the inclined surface, thereby unlocking the first locking mechanism 81. Since the second joint housing 72 rotates longer than the unlocking movement of the locking block 812 when the push rod 7 rotates and folds relative to the support rod 2, by setting the movable rod 842, the sliding block 845 and the fourth return spring 847, the first pull rope 843 and the second pull rope 846 can be kept in a straighter state, avoiding the friction noise problem caused by the second joint housing 72 being directly connected to the locking block 812 through the pull rope due to the excessive length of the pull rope.

[0037] 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 be converted from an unfolded state to a folded state after the locking device is unlocked, characterized in that: The device includes a front support rod (1), a front wheel (1a) at the lower end of the front support rod (1), a fixed seat (11) fixed at the upper end of the front support rod (1), a channel (12) on the fixed seat (11), a support rod (2) that can slide in the channel (12), a connecting seat (21) fixed at the lower end of the support rod (2), a rear support rod (3) rotatably connected to the connecting seat (21) around a first axis (A), a rear wheel (3a) at the lower end of the rear support rod (3), a linkage rod (4) rotatably connected between the fixed seat (11) and the rear support rod (3) in the middle, and a seat support frame (5) rotatably connected to the connecting seat (21) around a second axis (B), and a transmission rod (6) rotatably connected between the rear side of the seat support frame (5) and the rear support rod (3).

2. The stroller frame according to claim 1, characterized in that: The connecting seat (21) includes a seat body (211) and a sleeve (212) integrally formed with the seat body (211). The sleeve (212) is fitted on the front support rod (1) and can slide along the front support rod (1). The seat support frame (5) is rotatably connected to the inside of the sleeve (212) around the second axis (B). The rear support rod (3) includes a rear rod body (31) and a connecting body (32) fixedly installed on the upper end of the rear rod body (31). The connecting body (32) is rotatably connected to the seat body (211) around the first axis (A).

3. The stroller frame according to claim 2, characterized in that: The seat (211) is provided with an arc-shaped hole (213) along the circumferential direction. The connecting body (32) is provided with a connecting shaft (33) that passes through the arc-shaped hole (213) laterally and can move within the arc-shaped hole (213). The lower end of the transmission rod (6) is rotatably connected to the connecting shaft (33) around the third axis (C). The upper end of the transmission rod (6) is rotatably connected to the rear side of the seat support frame (5) around the fourth axis (D). The third axis (C) is offset from the first axis (A) and the two are parallel to each other.

4. The stroller frame according to claim 3, characterized in that: The transmission rod (6) includes a straight rod section (61) extending along the front-rear direction of the seat support frame (5). The rear end of the straight rod section (61) is rotatably connected to the seat support frame (5). The front end of the straight rod section (61) is connected to a first bent section (62) integrally formed with it and bent relative to it. The lower end of the first bent section (62) is connected to a second bent section (63) integrally formed with it and bent relative to it. The second bent section (63) is connected to a curved section (64) integrally formed with it. The lower end of the curved section (64) is rotatably connected to the connecting shaft (33).

5. The stroller frame according to claim 1, characterized in that: The upper end of the support rod (2) is connected to a push rod (7) that can rotate, unfold or fold relative to it.

6. The stroller frame according to claim 5, characterized in that: The locking device includes a first locking mechanism (81) disposed between the fixed base (11) and the support rod (2) and a second locking mechanism (82) disposed between the support rod (2) and the push rod (7). The push rod (7) is provided with a first unlocking component (83) for unlocking the second locking mechanism (82). The push rod (7) and the first locking mechanism (81) are provided with a linkage unlocking component (84) that can unlock the first locking mechanism (81) when the push rod (7) rotates and folds relative to the support rod (2).

7. The stroller frame according to claim 6, characterized in that: The first locking mechanism (81) includes a locking hole (811) on the side wall of the fixed base (11), a fixed rod (22) is fixedly provided in the support rod (2), a locking block (812) is slidably provided in the fixed rod (22) to engage or disengage from the locking hole (811), a first return spring (813) is provided between the fixed rod (22) and the locking block (812) to push the locking block (812) to reset, and the linkage unlocking component (84) is connected to the locking block (812) and can drive the locking block (812) to disengage from the locking hole (811).

8. The stroller frame according to claim 7, characterized in that: The support rod (2) has a first joint housing (23) at its upper end and a second joint housing (72) at its lower end. The second locking mechanism (82) includes a plurality of first slots (821) arranged circumferentially on the first joint housing (23) and a plurality of second slots (822) arranged circumferentially on the second joint housing (72). A spline (823) that can simultaneously engage with the first slots (821) and the second slots (822) is slidably provided in the first joint housing (23) and the second joint housing (72). A space is provided between the spline (823) and the second joint housing (72). A movable block (824) that can move laterally during rotation and push the spline (823) to disengage from the second slot (822) is provided on the movable block (824) along the circumferential direction. The second joint housing (72) is provided with a slanted protrusion (826) that cooperates with the slanted slot (825) and can push the movable block (824) to move laterally when it rotates. The movable block (824) is connected to the first unlocking member (83). A second return spring (827) that can push the spline (823) to slide back to its original position is provided between the spline (823) and the first joint housing (23).

9. The stroller frame according to claim 7, characterized in that: The linkage unlocking component (84) includes a sliding rod (841) that can slide within the fixed rod (22). The sliding rod (841) and the locking block (812) are in contact via an inclined surface, so that when the sliding rod (841) slides upward, it can drive the locking block (812) to disengage from the locking hole (811). The support rod (2) has a movable rod (842) in the middle that can move within it. A first pull rope (843) connecting the upper end of the sliding rod (841) and the lower end of the movable rod (842) is provided. A third return spring (844) is provided between the fixed rods (22) to push the sliding rod (841) back to its original position. A sliding block (845) is provided inside the movable rod (842) to slide relative to it. A second pull rope (846) is provided between the sliding block (845) and the push rod (7) to pull the sliding block (845) to slide when the push rod (7) rotates and folds relative to the support rod (2). A fourth return spring (847) is provided between the sliding block (845) and the movable rod (842) to push the sliding block (845) back to its original position.

10. The stroller frame according to claim 8, characterized in that: The first unlocking component (83) includes an operating block (831) located at the upper end of the push rod (7), and a third pull rope (832) is provided between the operating block (831) and the movable block (824) to pull the movable block (824) to rotate.

Images