Baby carriage frame folded through impact

Abstract

According to the technical scheme, a connecting piece is arranged between a handle pipe and a front foot pipe, the connecting piece comprises a first cavity and a second cavity which are communicated, the handle pipe and the front foot pipe extend into the first cavity and the second cavity respectively, and meanwhile the handle pipe and the front foot pipe are connected through the first cavity and the second cavity. A movable locking piece is arranged in the connecting piece, at least part of the locking piece is arranged in the first cavity, when the handle upper pipe slides downwards to impact the locking piece, the locking piece is extruded out of the first cavity, at the moment, locking of the locking piece on the handle pipe and the front foot pipe is relieved, and the stroller frame enters a foldable state. The bicycle folding device has the advantages of being simple in structure, fast and convenient to operate and low in production and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of infant and toddler products technology, and in particular to a stroller frame that retracts upon impact. Background Technology

[0002] As an essential tool for infants and toddlers' daily outings, the convenience and safety of strollers are always core concerns for consumers. In recent years, the market demand for lightweight design and one-handed quick-folding functionality in strollers has increased significantly, prompting continuous optimization of folding mechanism designs. The frame, as the core load-bearing structure of the stroller, directly impacts user experience and product reliability through the simplification of its folding mechanism. Currently, most mainstream folding solutions employ a linkage locking mechanism between the handlebars and leg tubes, releasing the locking mechanism to fold the frame. However, existing technologies generally suffer from complex structures and numerous parts, increasing manufacturing costs and potentially leading to higher failure rates.

[0003] In existing stroller folding mechanisms, a multi-stage transmission mechanism is typically used to trigger the locking mechanism via the handlebar. These mechanisms are generally of two types. The first involves a rigid intermediate lever between the handlebar and the locking mechanism. When the user presses down on the handlebar, the lever converts the longitudinal motion into a lateral thrust, driving the locking mechanism to move laterally and unlock. The second uses a sliding block as a transmission component. The handlebar first impacts the block, which then pushes the locking mechanism laterally, separating the handlebar from the leg frame. While these designs achieve the folding function, they all require additional intermediate transmission components (such as levers, sliders, or linkages) between the handlebar and the locking mechanism, forming a force transmission chain.

[0004] Therefore, the existing technical solutions described above have the following significant drawbacks: First, there is the issue of structural redundancy. The addition of intermediate transmission components (levers, sliders, etc.) significantly increases the number of parts, leading to more complex assembly processes and higher production costs. Second, there is the risk of reliability issues. Failure of any intermediate component in the multi-stage transmission chain (such as lever deformation or slider jamming) will cause the unlocking function to malfunction, reducing system stability. Third, there is the issue of operational lag. The extended force transmission path weakens the sensitivity of the operation response, requiring users to apply greater force to trigger unlocking, affecting the smoothness of folding. Finally, there is the issue of high maintenance costs. More additional parts mean more potential points of failure, increasing the difficulty of maintenance and the cost of spare parts. In summary, the existing technology, due to its reliance on a multi-stage transmission mechanism and the assembly of intermediate components forming the force transmission path in the folding mechanism, suffers from technical drawbacks such as complex structure, cumbersome operation, and high production and maintenance costs. Utility Model Content

[0005] The main purpose of this invention is to propose a stroller frame that retracts upon impact, aiming to solve the technical problems of complex structure, cumbersome operation, and high production and maintenance costs in the existing technology.

[0006] To achieve the above objectives, this utility model proposes a stroller frame that folds up upon impact, comprising a handlebar tube, a front leg tube connected to the handlebar tube, and a connector disposed between the handlebar tube and the front leg tube. The handlebar tube includes an upper handlebar tube and a lower handlebar tube, the upper handlebar tube being slidable along the lower handlebar tube. The connector includes a first cavity and a second cavity that pass through the handlebar tube, the handlebar tube extending into the first cavity, and the front leg tube extending into the second cavity. The connector is characterized in that: a locking member for locking the handlebar tube and the front leg tube is provided inside, and the locking member is at least partially disposed in the first cavity. After the upper handlebar tube slides along the lower handlebar tube, the bottom of the upper handlebar tube can push the locking member in the first cavity toward the second cavity, thereby squeezing the locking member out of the first cavity and thus releasing the locking member from locking the handlebar tube and the front leg tube.

[0007] Furthermore, the locking member includes a first driving ramp and a first abutting plane. The first driving ramp is located on the side of the locking member, while the first abutting plane is located on the front of the locking member.

[0008] Furthermore, the locking member has a receiving chamber on one side of the second cavity, and a first elastic member for resetting is provided in the receiving chamber.

[0009] Furthermore, the first elastic component is a spring, with one end of the spring fixed to the wall of the accommodating chamber and the other end connected to the locking component.

[0010] Furthermore, the bottom of the handle tube is provided with an end.

[0011] Furthermore, the end head includes a second driving ramp and a second abutting plane. The second driving ramp is located on the side of the end head, while the second abutting plane is located on the front of the end head.

[0012] Furthermore, the bottom of the handle tube is provided with a fixing seat to limit the lowest drop position of the end.

[0013] Furthermore, it also includes a rear leg tube, and an adjusting rod is provided between the rear leg tube and the connector. One end of the adjusting rod is rotatably connected to the connector, and the other end is movably connected to the rear leg tube. When one end of the adjusting rod rotates along the connector, the other end moves along the direction of the rear leg tube.

[0014] Furthermore, the adjusting linkage includes an upper linkage and a lower linkage. The upper linkage is rotatably connected to the connecting member. The lower linkage includes a first directional member arranged along the direction of the upper linkage and a second directional member extending into the rear leg tube and arranged along the direction of the rear leg tube. The rear leg tube is provided with a groove for limiting the range of motion of the bottom of the lower linkage.

[0015] Furthermore, the bottom of the first directional component is provided with a second elastic component for resetting the adjusting linkage.

[0016] This utility model provides a connector between the handlebar tube and the front leg tube. The connector includes a first cavity and a second cavity that pass through each other. The handlebar tube and the front leg tube extend into the first cavity and the second cavity, respectively. At the same time, a movable locking member is provided inside the connector. The locking member is at least partially located in the first cavity. When the upper handlebar tube slides down and impacts the locking member, the locking member is squeezed out of the first cavity. At this time, the locking member releases the lock on the handlebar tube and the front leg tube, and the frame enters a collapsible state. This utility model does not set an intermediate part in the force transmission path. The bicycle is collapsible directly through the impact action between the upper handlebar tube and the locking member. This utility model has the advantages of simple structure, quick operation and low production and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0019] Figure 3 An exploded view of the three-dimensional structure of the handle tube, connectors, and front leg tube;

[0020] Figure 4 An exploded view of the three-dimensional structure of the handle tube, end cap, and mounting base;

[0021] Figure 5 This is a top view of the cross-section of the connector;

[0022] Figure 6 An exploded view of the three-dimensional structure of the connector, adjusting rod, and rear foot tube;

[0023] Figure 7 This is a three-dimensional structural diagram of the lower connecting rod.

[0024] The above figures include the following reference numerals:

[0025] 1. Handle tube; 11. Upper handle tube; 12. Lower handle tube; 13. End; 131. Second drive ramp; 132. Second abutment plane; 2. Front leg tube; 3. Connector; 31. First cavity; 32. Second cavity; 33. Accommodating chamber; 34. Connecting part; 4. Locking element; 41. First drive ramp; 42. First abutment plane; 5. First elastic component; 6. Fixed seat; 7. Rear leg tube; 71. Slide groove; 8. Adjusting linkage; 81. Upper linkage; 811. Rotating component; 812. Upper rod body; 82. Lower linkage; 821. First directional component; 822. Second directional component; 823. Lower rod body; 824. Second elastic component; 825. Window; 9. Joint seat. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] This invention proposes a stroller frame that retracts upon impact.

[0030] In this embodiment of the utility model, such as Figures 1 to 7 As shown, this type of stroller frame that folds up by impact includes a handlebar tube 1, a front leg tube 2 connected to the handlebar tube 1, and a connector 3 disposed between the handlebar tube 1 and the front leg tube 2. The handlebar tube 1 includes an upper handlebar tube 11 and a lower handlebar tube 12. The upper handlebar tube 11 can slide along the lower handlebar tube 12. The connector 3 includes a first cavity 31 and a second cavity 32 that pass through it. The handlebar tube 1 extends into the first cavity 31, while the front leg tube 2 extends into the second cavity 32. The connector 3 is characterized by having a locking member 4 inside for locking the handlebar tube 1 and the front leg tube 2. The locking member 4 is at least partially disposed in the first cavity 31. After the upper handlebar tube 11 slides along the lower handlebar tube 12, the bottom of the upper handlebar tube 11 can push the locking member 4, which is located in the first cavity 31, toward the second cavity 32, thereby squeezing the locking member 4 out of the first cavity 31 and releasing the locking member 4 from locking the handlebar tube 1 and the front leg tube 2.

[0031] In some embodiments of this utility model, in order to make the impact unlocking operation smoother, the locking member 4 includes a first driving inclined surface 41 and a first abutting surface 42. The first driving inclined surface 41 is provided on the side of the locking member 4, while the first abutting surface 42 is provided on the front of the locking member 4. The function of the first driving inclined surface 41 is to enhance the side force movement effect of the locking member 4. The aforementioned front of the locking member 4 should be understood as the middle end of the locking member 4 shown in the figure, and the aforementioned side of the locking member 4 should be understood as the side end of the locking member 4 shown in the figure. When the upper tube 11 of the handle falls and impacts, it will first impact the side end of the locking member 4. Therefore, the first driving inclined surface 41 is preferably provided on the side of the locking member 4.

[0032] Specifically, the locking member 4 has a receiving chamber 33 on one side of the second cavity 32. The receiving chamber 33 has a first elastic member 5 for resetting. The function of the first elastic member 5 is to enable the locking member 4, which has been squeezed out of the first cavity 31, to return to the first cavity 31 and lock the frame after the position of the handlebar tube 11 is restored.

[0033] Furthermore, the first elastic component 5 is a spring, one end of which is fixed to the wall of the accommodating chamber 33, and the other end is connected to the locking component 4. In some other embodiments of this utility model, the first elastic component 5 can be replaced by materials with elastic properties such as rubber, sponge, and elastic fibers. The selection of materials with elastic properties is a prior art part, which will not be described in detail here.

[0034] In some embodiments of this utility model, the bottom of the upper handle tube 11 is provided with an end 13. The function of the end 13 is to enhance the impact performance of the bottom of the upper handle tube 11 so as to smoothly enable the locking member 4 to complete the unlocking action.

[0035] Specifically, the end 13 includes a second driving slope 131 and a second abutting plane 132. The second driving slope 131 is located on the side of the end 13, while the second abutting plane 132 is located on the front of the end 13. The beneficial effect of the second driving slope 131 is the same as that of the first driving slope 41, which is used to enhance the side force movement effect of the locking member 4. When the first driving slope 41 and the second driving slope 131 are configured together, it is a preferred embodiment of this utility model. In this case, the locking member 4 can complete the unlocking action more smoothly.

[0036] Specifically, the bottom of the lower handle tube 12 is provided with a fixing seat 6 to limit the lowest falling position of the end 13. The fixing seat 6 limits the end 13 as the lowest falling position of the upper handle tube 11. Please refer to the example below. Figure 1 , Figure 2 as well as Figure 4The fixed seat 6 is actually a part of the joint seat 9 below the handle tube 1. The setting position of the fixed seat 6 is not limited, and the setting of the joint seat 9 shown in the figure is only used as a reference example.

[0037] In some embodiments of this utility model, a rear leg tube 7 is also included. An adjusting rod 8 is provided between the rear leg tube 7 and the connecting member 3. One end of the adjusting rod 8 is rotatably connected to the connecting member 3, and the other end is movably connected to the rear leg tube 7. When one end of the adjusting rod 8 rotates along the connecting member 3, the other end moves along the direction of the rear leg tube 7. When the locking member 4 completes the unlocking action, the frame is in a retractable state. In conjunction with the retraction of the handlebar tube 1 relative to the front leg tube 2, the rotational connection between the adjusting rod 8 and the connecting member 3 allows the frame to be further retracted. When the frame is retracted, one end of the adjusting rod 8 rotates around the connecting member 3, and the other end moves in the rear leg tube 7, thereby forming a downward overall retraction trend. Please refer to the retraction direction of the adjusting rod 8. Figure 2 The direction is shown. Additionally, please refer to the following for the rotation point of adjusting linkage 8: Figure 6 As shown, the connector 3 includes a mating part 34 for mating with the adjusting link 8.

[0038] Specifically, the adjusting link 8 includes an upper link 81 and a lower link 82. The upper link 81 is rotatably connected to the connector 3. The lower link 82 includes a first directional member 821 arranged along the direction of the upper link 81 and a second directional member 822 extending into the rear leg tube 7 and arranged along the direction of the rear leg tube 7. The rear leg tube 7 is provided with a groove 71 for limiting the range of motion of the bottom of the lower link 82.

[0039] More specifically, the upper connecting rod 81 includes a rotating member 811 and an upper rod body 812, and the lower connecting rod 82 includes a lower rod body 823. The upper rod body 812 extends into the lower rod body 823, and the upper rod body 812 internally encloses the first directional member 821. After the rotating member 811 rotates around the connecting member 3, the upper rod body 812 drives the first directional member 821 to press down, and then the second directional member 822 slides in the opening direction of the slide groove 71 to achieve a retraction action, such as... Figure 6 and Figure 7 As shown, in order to enhance the smoothness of the retraction action, the second directional component 822 and the lower rod body 823 are integrally formed. The advantage of integral forming is that the structure is stable.

[0040] Specifically, the bottom of the first directional member 821 is provided with a second elastic member 824 for resetting the adjusting linkage 8, as shown in the figure below. Figure 6 and Figure 7Understanding the content shown, after the first directional component 821 moves downward under the action of the upper connecting rod 81, and after the influence of the aforementioned retraction action disappears, the first directional component 821 automatically resets through the second elastic component 824. Further, the second elastic component 824 is a spring. At the same time, a window 825 is provided at the location of the spring on the lower connecting rod 82. The window 825 is used to check the usage status of the spring (mainly the compression status). In some other embodiments of this utility model, the second elastic component 824 can also be replaced by an equivalent material component with elastic properties such as rubber, sponge, and elastic fiber, the same as the first elastic component 5. This is the prior art and will not be described in detail.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stroller frame that folds up upon impact, comprising a handlebar tube, front leg tubes connected to the handlebar tube, and a connector disposed between the handlebar tube and the front leg tubes, the handlebar tube comprising an upper handlebar tube and a lower handlebar tube, the upper handlebar tube being slidable along the lower handlebar tube, the connector comprising a through first cavity and a second cavity, the handlebar tube extending into the first cavity, and the front leg tube extending into the second cavity, characterized in that: The connector has a locking element inside for locking the handle tube and the front leg tube. The locking element is at least partially located in the first cavity. After the upper handle tube slides along the lower handle tube, the bottom of the upper handle tube can push the locking element in the first cavity toward the second cavity, thereby squeezing the locking element out of the first cavity and releasing the locking element from locking the handle tube and the front leg tube.

2. The stroller frame as described in claim 1, characterized in that: The locking member includes a first driving ramp and a first abutting plane. The first driving ramp is located on the side of the locking member, while the first abutting plane is located on the front of the locking member.

3. The stroller frame as described in claim 2, characterized in that: The locking member has a receiving chamber on one side of the second cavity, and a first elastic component for resetting is provided in the receiving chamber.

4. The stroller frame as described in claim 3, characterized in that: The first elastic component is a spring, with one end fixed to the wall of the accommodating chamber and the other end connected to a locking element.

5. The stroller frame as described in claim 1, characterized in that: The bottom of the handle tube has an end.

6. The stroller frame as described in claim 5, characterized in that: The end head includes a second driving ramp and a second abutting plane. The second driving ramp is located on the side of the end head, while the second abutting plane is located on the front of the end head.

7. The stroller frame as described in claim 5, characterized in that: The bottom of the handle tube is equipped with a fixing seat to limit the lowest drop position of the end.

8. The stroller frame as described in claim 1, characterized in that: It also includes a rear leg tube, and an adjusting rod is provided between the rear leg tube and the connector. One end of the adjusting rod is rotatably connected to the connector, and the other end is movably connected to the rear leg tube. When one end of the adjusting rod rotates along the connector, the other end moves along the direction of the rear leg tube.

9. The stroller frame as described in claim 8, characterized in that: The adjusting linkage includes an upper linkage and a lower linkage. The upper linkage is rotatably connected to the connecting member. The lower linkage includes a first directional member arranged along the direction of the upper linkage and a second directional member extending into the rear leg tube and arranged along the direction of the rear leg tube. The rear leg tube is provided with a groove for limiting the range of motion of the bottom of the lower linkage.

10. The stroller frame as described in claim 9, characterized in that: The bottom of the first directional component is provided with a second elastic component for resetting the adjusting linkage.

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