Forward leaning prevention structure of doll car

Abstract

The utility model relates to the technical field of doll cars, in particular to a forward inclination prevention structure of a doll car, which comprises a frame body and a cushion portion arranged on the frame body, the frame body comprises a main frame and an auxiliary frame, the upper end of the auxiliary frame is connected with the middle end of the main frame, the cushion portion is arranged on the main frame, and the cushion portion is arranged on the auxiliary frame. A first walking wheel and a second walking wheel are arranged at the lower end of the main frame and the lower end of the auxiliary frame respectively, a supporting frame is arranged on the auxiliary frame in a protruding mode, a supporting portion is arranged at the end of the supporting frame, the bottom of the supporting portion is higher than the first walking wheel and the second walking wheel, and the second walking wheel is arranged between the first walking wheel and the supporting portion. According to the forward leaning prevention structure, the safety of a child sitting on the doll car can be improved, and the whole doll car is prevented from leaning forward when universal wheels are clamped due to accidents.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of baby stroller, and particularly relates to a front-leaning-prevention structure of baby stroller. BACKGROUND

[0002] The baby stroller is a kind of traffic tool for parents to take children out for a walk, and the traditional baby stroller is usually composed of a frame and a seat arranged on the frame, so that children can be placed on the seat, and parents can take children for a walk without holding them by hand by pushing or pulling, in order to facilitate the movement of the baby stroller, a plurality of universal wheels are usually attached to the bottom of the baby stroller, but if the universal wheels at the front end of the baby stroller touch stones or potholes on the road during movement, the universal wheels will be stuck, the back end of the baby stroller will be raised to cause easy front-leaning, and the safety of children sitting on the seat will be affected, therefore, a front-leaning-prevention structure is needed to improve the safety of children sitting on the baby stroller and prevent the baby stroller from front-leaning when the universal wheels are stuck due to unexpected situations. SUMMARY

[0003] The utility model aims at providing a front-leaning-prevention structure with simple structure, which can improve the safety of children sitting on the baby stroller and prevent the baby stroller from front-leaning when the universal wheels are stuck due to unexpected situations.

[0004] The utility model is realized as follows:

[0005] A front-leaning-prevention structure of baby stroller, which comprises a frame main body and a seat cushion part arranged on the frame main body, the frame main body comprises a main frame and a sub-frame, the upper end of the sub-frame is connected with the middle end of the main frame, the seat cushion part is arranged on the main frame, the lower end of the main frame and the sub-frame is respectively provided with a first walking wheel and a second walking wheel, the sub-frame is provided with a support frame, the end of the support frame is provided with a support part, the bottom of the support part is higher than the first walking wheel and the second walking wheel, the second walking wheel is arranged between the first walking wheel and the support part, when the second walking wheel is limited from moving due to resistance, the main frame and the sub-frame can be tilted forward to drive the support frame to move downward, so that the support part is in contact with the ground, and the support part can limit the main frame and the sub-frame from continuing to tilt forward.

[0006] Further, the sub-frame comprises a left connecting frame and a right connecting frame, a transversely arranged footrest frame is connected between the left connecting frame and the right connecting frame, and one end of the support frame is movably connected with the footrest frame.

[0007] Further, the distance between the support part and the second walking wheel is greater than the distance between the second walking wheel and the first walking wheel.

[0008] Further, the number of the first walking wheel and the second walking wheel is two.

[0009] Furthermore, the footrest is movably equipped with a clamping component, which includes a clamping plate and a clamping tube. The clamping plate is rotatably connected to one end of the clamping tube. The clamping tube is equipped with a quick-release assembly. One end of the quick-release assembly is rotatably connected to the clamping tube, and the other end can abut against the clamping plate and restrict the rotation of the clamping plate and the clamping tube. One end of the clamping tube is movably connected to the support frame.

[0010] Furthermore, the quick-release assembly includes a rotating block, a threaded rod, and a rotary switch. One end of the threaded rod is connected to the rotary switch, and the other end is threadedly connected to the rotating block. Driving the rotary switch to rotate can cause the rotating block to rotate relative to the clamp tube through the threaded rod. The clamp plate is provided with an abutment part, and the abutment part has a receiving hole for the threaded rod to extend into. Driving the rotary switch to rotate can cause the threaded rod to extend into the receiving hole. At this time, one end of the rotary switch abuts against the abutment part and prevents the threaded rod from disengaging from the receiving hole.

[0011] Furthermore, the support part is an auxiliary wheel, which is movably connected to the support frame. The support frame extends into the clamp tube. Both the support frame and the clamp tube have through holes. The support frame has an elastic element inside. One end of the elastic element is located in the through hole, and the other end abuts against the inner wall of the support frame. Pressing the elastic element can cause it to disengage from the through hole and retract into the support frame.

[0012] Furthermore, the upper end of the subframe is rotatably connected to the middle end of the main frame, and can be folded and retracted relative to the main frame.

[0013] Furthermore, the main frame is also equipped with a housing, the subframe can be folded and retracted to the rear end of the housing, and the main frame is also equipped with a handrail.

[0014] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0015] This utility model relates to an anti-tipping structure for a stroller. When one wheel gets stuck or other accidents cause one end of the stroller to tilt, it effectively prevents the entire stroller from tipping over, improving safety. The stroller includes a main frame and a sub-frame. A first and second driving wheel are respectively installed at the lower ends of the main and sub-frames. The first and second driving wheels are positioned one in front of the other, making the stroller more stable. A support frame protrudes from the sub-frame, and a support part is provided at the end of the support frame. This protrusion ensures that the support part is positioned above the second driving wheel, with its bottom higher than both the first and second driving wheels. Therefore, during normal use, the support part will not affect the first and second driving wheels. As the wheels roll along the ground, if one of the first or second wheels gets stuck due to a stone or pothole, the wheel will normally lift and tilt forward. At this point, the support frame will move downwards due to the wheel's tilt, bringing the support into contact with the ground. This prevents the main frame and subframe from tilting further forward, allowing parents to react quickly to any unexpected situation and avoid pulling on the frame. This greatly improves child safety, promptly alerting parents and protecting the child while maintaining the frame's balance. This design is adaptable to different road conditions and various situations, enhancing the overall structural stability from a mechanical perspective. This stable structure better resists external impacts and disturbances, ensuring the stroller remains balanced in various unexpected situations, reducing the risk of vehicle damage or injury to the child due to imbalance. The stroller maintains its original maneuverability; users can easily push the stroller in a straight line and turn without feeling any difficulty or discomfort due to the support frame. Attached Figure 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 This is a side view of the present invention.

[0019] Figure 4 This is a rear view of the present invention.

[0020] Figure 5 This is a schematic diagram of the present invention after the casing has been removed.

[0021] Figure 6 This is a schematic diagram of the subframe of this utility model.

[0022] Figure 7 This is a schematic diagram showing the connection between the auxiliary wheel and the footrest of this utility model.

[0023] Figure 8 This is a schematic diagram of the clamp plate of this utility model after it has been opened.

[0024] Figure 9 This is a separate diagram of the connecting pipe and the clamping pipe of this utility model.

[0025] Figure 10 This is a separate diagram of the quick-release assembly and the clamping part of this utility model.

[0026] The meaning of the labels in the diagram:

[0027] 1-Chassis body; 2-Seat; 3-Main frame; 4-Subframe; 5-First wheel;

[0028] 6-Second traveling wheel; 7-Support frame; 8-Support part; 9-Clamping part; 10-Clamping plate; 11-Clamping tube; 12-Quick release assembly; 13-Rotating block; 14-Threaded rod; 15-Rotary switch; 16-Abutting part; 17-Accommodation hole; 19-Elastic element; 20-Left connecting frame; 21-Right connecting frame; 22-Foot pedal frame; 23-Box body; 24-Handrail. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments:

[0030] An anti-tilting structure for a stroller includes a frame body 1 and a seat cushion 2 mounted on the frame body 1. The frame body 1 includes a main frame 3 and a sub-frame 4. The upper end of the sub-frame 4 is connected to the middle of the main frame 3. The seat cushion 2 is mounted on the main frame 3. The lower ends of the main frame 3 and the sub-frame 4 are respectively provided with a first wheel 5 and a second wheel 6. A support frame 7 protrudes from the sub-frame 4. The end of the support frame 7 is provided with a support part 8. The bottom of the support part 8 is higher than the first wheel 5 and the second wheel 6. The second wheel 6 is located between the first wheel 5 and the support part 8. When the second wheel 6 is restricted by resistance and cannot move, the main frame 3 and the sub-frame 4 can tilt forward, causing the support frame 7 to move downward, so that the support part 8 contacts the ground. At this time, the support part 8 can prevent the main frame 3 and the sub-frame 4 from tilting forward.

[0031] This utility model relates to an anti-tipping structure for a stroller. When one wheel gets stuck or another accident causes one end of the stroller to tilt, it effectively prevents the entire stroller from tipping over, improving safety. The stroller includes a main frame 3 and a sub-frame 4. A first wheel 5 and a second wheel 6 are respectively installed at the lower ends of the main frame 3 and the sub-frame 4. The first wheel 5 and the second wheel 6 are positioned one in front of the other, making the stroller more stable. A support frame 7 protrudes from the sub-frame 4, and a support part 8 is provided at the end of the support frame 7. This protrusion ensures that the support part 8 protrudes above the second wheel 6, and the bottom of the support part 8 is higher than the first wheel 5 and the second wheel 6. Therefore, during normal use, the support part 8 will not affect the first wheel. The first wheel 5 and the second wheel 6 roll along the ground. When encountering a stone or pothole, causing one of the first wheel 5 or the second wheel 6 to become stuck, the wheel will normally lift up and tilt forward. At this time, the support frame 7 will move downward due to the lifting of the wheel, causing the support part 8 to contact the ground. At this time, the main frame 3 and the sub-frame 4 are prevented from tilting forward. This allows parents to react in time to any unexpected situation and avoid pulling the frame body 1, greatly improving the safety of children. It can promptly alert parents and protect children while maintaining the balance of the frame body 1. This utility model can adapt to different road conditions and cope with various situations, enhancing the stability of the overall structure from a mechanical perspective. This stable structure can better resist external impacts and interference forces, ensuring that the stroller can maintain balance in various unexpected situations, reducing the risk of vehicle damage or injury to the baby due to imbalance. The stroller can maintain its original flexible maneuverability. Users can easily push the stroller to move in a straight line and turn, without feeling that pushing it is difficult or awkward due to the presence of the support frame 7.

[0032] Preferably, the subframe 4 includes a left connecting frame 20 and a right connecting frame 21, and a horizontally arranged footrest 22 is connected between the left connecting frame 20 and the right connecting frame 21. One end of the support frame 7 is movably connected to the footrest 22, so that children can place their feet on the footrest 22 and provide children with a better sitting posture.

[0033] Preferably, the distance between the support part 8 and the second traveling wheel 6 is greater than the distance between the second traveling wheel 6 and the first traveling wheel 5, so that the support part 8 can contact the ground faster than the speed at which the frame body 1 tilts forward, allowing parents to have timely reaction time.

[0034] Preferably, there are two first traveling wheels 5 and two second traveling wheels 6. The four wheels, one in front and one behind, can make the frame body 1 walk more stably and more smoothly than with two or three wheels.

[0035] Preferably, a clamping member 9 is movably provided on the footrest 22. The clamping member 9 includes a clamping plate 10 and a clamping tube 11. The clamping plate 10 is rotatably connected to one end of the clamping tube 11. A quick-release assembly 12 is provided on the clamping tube 11. One end of the quick-release assembly 12 is rotatably connected to the clamping tube 11, and the other end can abut against the clamping plate 10 and restrict the rotation of the clamping plate 10 and the clamping tube 11. One end of the clamping tube 11 is movably connected to the support frame 7. The clamping member 9 can effectively fix the support frame 7 on the footrest 22 and prevent it from moving at will. The clamp 9 consists of a clamp plate 10 and a clamp tube 11. One end of the clamp plate 10 is rotatably connected to the clamp tube 11, allowing the clamp plate 10 to rotate relative to the clamp tube 11. The two can be quickly disassembled or locked through the quick-release assembly 12, making it easy to quickly replace the support frame 7. Users can also adjust the angle of the clamp 9 to prevent forward tilting when dealing with different slopes. Users can also select the left and right movement position through the clamp 9 to adjust the reaction time of people after the first walking wheel 5 and the second walking wheel 6 are restricted.

[0036] Preferably, the quick-release assembly 12 includes a rotating block 13, a threaded rod 14, and a rotary switch 15. One end of the threaded rod 14 is connected to the rotary switch 15, and the other end is threadedly connected to the rotating block 13. Driving the rotary switch 15 to rotate can cause the rotating block 13 to rotate relative to the clamping tube 11 via the threaded rod 14. The clamping plate 10 is provided with an abutment portion 16, and the abutment portion 16 has a receiving hole 17 for the threaded rod 14 to extend into. Driving the rotary switch 15 to rotate allows the threaded rod 14 to extend into the receiving hole 17. At this time, one end of the rotary switch 15 is connected to the abutment portion 16. The six-phase abutment and restriction prevents the threaded rod 14 from disengaging from the receiving hole 17. This utility model achieves disassembly through the quick-release assembly 12. The rotating block 13 is rotatably connected to the clamp tube 11. The rotating block 13 is driven to rotate. The rotating block 13 can rotate around the clamp tube 11 through the rotating shaft. The rotating block 13 is threadedly connected to the threaded rod 14. Therefore, the rotating block 13 will rotate synchronously with the threaded rod 14. When the rotating switch 15 is opened, the rotating block 13 can make the threaded rod 14 disengage from the receiving hole 17. At this time, the abutment part 16 on the clamp plate 10 will not be restricted, so it can be rotated and opened relative to the clamp tube 11.

[0037] Preferably, the support part 8 is an auxiliary wheel, which is movably connected to the support frame 7. The support frame 7 extends into the clamp tube 11. Both the support frame 7 and the clamp tube 11 have through holes. The support frame 7 has an elastic element 19 inside. One end of the elastic element 19 is located in the through hole, and the other end abuts against the inner wall of the support frame 7. Pressing the elastic element 19 can cause it to disengage from the through hole and retract into the support frame 7. The through holes on the support frame 7 correspond to the through holes on the clamp tube 11. In its natural state, part of the elastic element 19 is located in the through hole, which serves a positioning function. During installation, simply align the support frame 7 with the corresponding position on the clamp tube 11. The elastic element 19 helps to quickly find the correct position, making installation more convenient and efficient. No complicated measurement and alignment operations are required. This prevents the connecting tube from accidentally coming out of the clamp tube 11 due to vibration, collision, or other reasons during normal operation of the stroller, ensuring the stability of the connection between the auxiliary wheel and the frame body 1 and guaranteeing the safety of the stroller. Under different road conditions or depending on the load of the stroller, the support frame 7 can be moved up and down within the clamp tube 11 by pressing the elastic element 19. After adjusting to the appropriate height, the elastic element 19 can be released to allow it to re-engage in the through hole, enabling quick and fine adjustment of the auxiliary wheel height to meet different usage needs.

[0038] Preferably, the upper end of the subframe 4 is rotatably connected to the middle end of the main frame 3, and can be folded and retracted relative to the main frame 3, so as to save space when not in use.

[0039] Preferably, the main frame 3 is also provided with a box 23, the sub-frame 4 can be folded and retracted to the rear end of the box 23, and the main frame 3 is also provided with a handrail 24. When the user goes out, he / she can store his / her clothes in the box 23, and children can sit on the box 23. The handrail 24 is easy for children to hold and increases safety.

[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A forward-tilting structure for a stroller, comprising a frame body (1) and a seat cushion (2) disposed on the frame body (1), wherein the frame body (1) comprises a main frame (3) and a sub-frame (4), the upper end of the sub-frame (4) being connected to the middle end of the main frame (3), and the seat cushion (2) being disposed on the main frame (3), characterized in that, The lower ends of the main frame (3) and the sub-frame (4) are respectively provided with a first traveling wheel (5) and a second traveling wheel (6). A support frame (7) protrudes from the sub-frame (4). A support part (8) is provided at the end of the support frame (7). The bottom of the support part (8) is higher than the first traveling wheel (5) and the second traveling wheel (6). The second traveling wheel (6) is located between the first traveling wheel (5) and the support part (8). When the second traveling wheel (6) is restricted by resistance and cannot move, the main frame (3) and the sub-frame (4) can tilt forward to drive the support frame (7) to move downward, so that the support part (8) contacts the ground. At this time, the support part (8) can restrict the main frame (3) and the sub-frame (4) from continuing to tilt forward.

2. The anti-tilting structure for a stroller according to claim 1, characterized in that: The subframe (4) includes a left connecting frame (20) and a right connecting frame (21). A footrest (22) is horizontally connected between the left connecting frame (20) and the right connecting frame (21). One end of the support frame (7) is movably connected to the footrest (22).

3. The anti-tilting structure for a stroller according to claim 2, characterized in that: The distance between the support (8) and the second traveling wheel (6) is greater than the distance between the second traveling wheel (6) and the first traveling wheel (5).

4. The anti-tilting structure for a stroller according to claim 3, characterized in that: The number of the first traveling wheel (5) and the second traveling wheel (6) are both two.

5. The anti-tilting structure for a stroller according to any one of claims 2-4, characterized in that: The footrest (22) is movably provided with a clamp (9), which includes a clamp plate (10) and a clamp tube (11). The clamp plate (10) is rotatably connected to one end of the clamp tube (11). The clamp tube (11) is provided with a quick-release assembly (12). One end of the quick-release assembly (12) is rotatably connected to the clamp tube (11), and the other end can abut against the clamp plate (10) and restrict the rotation of the clamp plate (10) and the clamp tube (11). One end of the clamp tube (11) is movably connected to the support frame (7).

6. The anti-tilting structure for a stroller according to claim 5, characterized in that: The quick-release assembly (12) includes a rotating block (13), a threaded rod (14), and a rotary switch (15). One end of the threaded rod (14) is connected to the rotary switch (15), and the other end is threadedly connected to the rotating block (13). Driving the rotary switch (15) to rotate can cause the rotating block (13) to rotate relative to the clamp tube (11) through the threaded rod (14). The clamp plate (10) is provided with an abutment part (16). The abutment part (16) is provided with a receiving hole (17) into which the threaded rod (14) can be inserted. Driving the rotary switch (15) to rotate can cause the threaded rod (14) to be inserted into the receiving hole (17). At this time, one end of the rotary switch (15) abuts against the abutment part (16) and restricts the threaded rod (14) from disengaging from the receiving hole (17).

7. The anti-tilting structure for a stroller according to claim 6, characterized in that: The support part (8) is an auxiliary wheel, which is movably connected to the support frame (7). Part of the support frame (7) extends into the clamp tube (11). Both the support frame (7) and the clamp tube (11) have through holes. The support frame (7) has an elastic element (19) inside. One end of the elastic element (19) is located in the through hole, and the other end abuts against the inner wall of the support frame (7). Pressing the elastic element (19) can cause the elastic element (19) to disengage from the through hole and retract into the support frame (7).

8. The anti-tilting structure for a stroller according to claim 1, characterized in that: The upper end of the subframe (4) is rotatably connected to the middle end of the main frame (3) and can be folded and retracted relative to the main frame (3).

9. The anti-tilting structure of a stroller according to claim 8, characterized in that: The main frame (3) is also provided with a box (23), the sub-frame (4) can be folded and retracted to the rear end of the box (23), and the main frame (3) is also provided with a handrail (24).

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