A four-folded energy-driven headrest automatic folding baby stroller

Abstract

This invention discloses a four-fold stroller with an automatically folding headrest, comprising a four-fold stroller frame, a traction trigger component connected to one end of the seat cushion rod of the four-fold stroller frame, the traction trigger component being movably connected to the lower connecting rod of the four-fold stroller frame, and a traction positioning component connected to the surface of the backrest panel of the four-fold stroller frame, used to lock or unlock the headrest panel of the four-fold stroller frame; when the four-fold stroller frame is unlocked, the frame folds under the action of gravity; during the folding process, the seat cushion rod and the backrest panel can move relative to each other and trigger the traction trigger component. This invention enables the stroller frame to simultaneously fold and retract the headrest panel during the four-fold process, truly achieving one-button folding, effectively solving the problem that traditional strollers often require manual operation of the headrest panel, resulting in a cumbersome and complex folding process, thereby improving the user experience.

Description

Technical Field

[0001] This invention belongs to the field of baby strollers, specifically relating to a four-fold baby stroller with an automatically collapsible headrest. Background Technology

[0002] As an essential tool for infants and toddlers' outings, strollers are widely used by consumers. Currently, while consumers demand basic features like sturdiness and safety, they are also increasingly focused on portability, paying more attention to products that are compact, lightweight, and foldable. Strollers with these advantages can not only be easily stored in a car trunk, but also significantly reduce space usage when traveling by public transportation such as buses, airplanes, and trains, greatly improving the convenience of travel and carrying.

[0003] Currently, there are several patents for folding stroller technology, such as the foldable stroller structure with publication number CN223467190U and the foldable stroller with publication number CN212828632U. Both of these patents achieve the convenient function of one-click folding (folding). However, with the development of the market, in order to further improve the comfort of infants and toddlers, most strollers nowadays, in addition to the conventional seats and backrests, have also added headrest structures. Faced with the newly added headrest storage on the market, traditional folding strollers mostly rely on manual operation. The headrest must be stored separately first, and then the whole stroller can be folded with one click. This makes the entire folding process cumbersome and the operation steps complicated. Especially when the user is holding an infant alone, it is difficult to complete the folding operation smoothly, which seriously affects the user's actual user experience. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a four-fold stroller with an automatically folding headrest to meet the need for one-button folding.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: A four-fold stroller with an automatically collapsible headrest includes a four-fold stroller frame. One end of the seat cushion rod of the four-fold stroller frame is connected to a traction triggering component. The traction triggering component is movably connected to the lower connecting rod of the four-fold stroller frame. A traction positioning component is connected to the surface of the backrest panel of the four-fold stroller frame. The traction positioning component is used to lock or unlock the headrest panel of the four-fold stroller frame. When the four-fold trolley frame is unlocked, the frame folds under the action of gravity. During the folding process, the seat cushion rod and the backrest can move relative to each other and trigger the traction triggering component. After the traction triggering component is triggered, it can drive the traction positioning component so that when the four-fold trolley frame is about to be folded, the headrest and the backrest are unlocked, realizing the folding and closing of the headrest towards the backrest.

[0006] Furthermore, the traction positioning assembly includes a support body connected to the surface of the backrest panel, a locking rod and a limiting rod disposed in the inner cavity of the support body, a return spring located between the locking rod and the limiting rod, a rotating component installed at one end of the support body, and a traction wire connected to one end of the locking rod; the traction triggering assembly is used to drive the traction wire to disengage the locking head of the locking rod from the slot of the rotating component; the return spring is used to drive the locking head of the locking rod to insert into the slot of the rotating component; and a torsion spring is provided between the support body and the rotating component, and the rotating component drives the headrest panel to fold and retract through the force of the torsion spring.

[0007] Furthermore, the traction triggering component includes a stabilizing member fixedly connected to the seat cushion rod and a backrest limiting member movably connected to the stabilizing member. The support body is rotatably connected to the backrest limiting member. The backrest limiting member is movably connected to the lower connecting rod through a connecting rod, and the end of the traction wire away from the locking rod is locked in the stabilizing member. When the stabilizing member and the backrest limiting member rotate relative to each other around the hinge point, the traction wire is driven and pulls the locking rod, causing the locking head of the locking rod to disengage from the groove of the rotating member.

[0008] Furthermore, a fixed wheel block is integrally formed on the backrest limiting member, and a guide wheel is installed inside the fixed wheel block. The movement path of the traction wire is located in the groove of the guide wheel.

[0009] Furthermore, the traction triggering component includes a stabilizing member fixedly connected to the seat cushion rod and a backrest limiting member movably connected to the stabilizing member. The support body is rotatably connected to the backrest limiting member. The backrest limiting member is movably connected to the lower connecting rod through a connecting rod. A stabilizing wire is slidably arranged inside the backrest limiting member. The end of the traction wire away from the locking rod is locked in the stabilizing wire. When the stabilizing member and the backrest limiting member rotate relative to each other around the hinge point, the stabilizing wire slides within the backrest limiting member and drives the traction wire to pull the locking rod, causing the locking head of the locking rod to disengage from the slot of the rotating member.

[0010] Furthermore, the backrest limiting member is integrally formed with a hollow block for insertion into the stabilizing member. The stabilizing wire is slidably disposed on the inner side of the hollow block, and the surface of the hollow block is provided with a guide strip hole communicating with its inner cavity. The guide strip hole is provided with a guide rod fixedly connected to the stabilizing wire. The surface of the stabilizing member is provided with a path hole, and the end of the guide rod extends to the inner side of the path hole.

[0011] Furthermore, one end of the lower connecting rod is movably connected to the push handle assembly of the four-fold trolley frame, and the other end of the lower connecting rod is movably connected to the rear wheel assembly of the four-fold trolley frame. The other end of the lower connecting rod is movably connected to a basket assembly via a transmission plate. The basket assembly is movably connected to the rear wheel assembly and the front wheel assembly of the four-fold trolley frame. A rotating block is fixedly connected to the end of the rear wheel assembly. The rear wheel assembly is rotatably connected to the front wheel assembly and the push handle assembly via the rotating block. The rotating block is movably connected to the seat support rod via a seat support rod.

[0012] Furthermore, the basket assembly includes a rear basket pole rotatably connected to the rear wheel assembly and a front basket pole rotatably connected to the front wheel assembly, with one end of the rear basket pole being movably connected to one end of the front basket pole.

[0013] Furthermore, the push handle assembly includes a push rod, an upper push handle tube connected to the push rod, and a lower push handle tube rotatably connected to the upper push handle tube. The push rod is provided with a folding trigger assembly, which is used to lock or unlock the connection between the upper push handle tube and the lower push handle tube. When the folding trigger assembly unlocks the connection between the upper push handle tube and the lower push handle tube, the upper push handle tube and the lower push handle tube can rotate relative to each other around the hinge point, and the upper end of the lower connecting rod is movably connected to the upper push handle tube.

[0014] Furthermore, the surface of the rotating point block is provided with a first storage area and a second storage area, the end of the push handle lower tube away from the push handle upper tube is rotatably connected to the first storage area, and the end of the front wheel assembly is rotatably connected to the second storage area.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By adding a traction triggering component and a traction positioning component to the main body of the frame, the present invention can achieve the effect of folding the headrest simultaneously during the four-folding process of the frame, thus realizing one-click folding. This effectively solves the problem that traditional baby strollers often require manual operation of the headrest, resulting in a cumbersome and complicated folding process, thereby improving the user experience.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a front perspective view (unfolded state) of the overall structure of the present invention; Figure 2 This is a rear perspective view of the overall structure of the present invention; Figure 3 This is a perspective view of the backrest panel after the angle has been adjusted according to the present invention. Figure 4 This is a schematic diagram of a cross-sectional structure of the backrest panel of the present invention. Figure 5 This is a schematic diagram of the backrest panel of the present invention from another perspective. Figure 6 for Figure 2 A magnified view of a section at point A in the middle; Figure 7 for Figure 3 A magnified view of a section at point B in the middle; Figure 8 for Figure 4 A magnified view of a section at point C; Figure 9 for Figure 5 A magnified view of a section at point D; Figure 10 for Figure 5 A magnified view of a section at point E in the middle; Figure 11 This is a schematic diagram of the backrest, headrest, and traction triggering component structure in Embodiment 1. Figure 12 This is a cross-sectional structural diagram of the support body of the present invention; Figure 13 for Figure 12 A magnified view of a section at point F in the middle; Figure 14 This is a schematic diagram of the backrest, headrest, and traction triggering assembly structure in Embodiment 2; Figure 15 for Figure 14 A magnified view of a section at point H in the middle; Figure 16 This is a schematic diagram of the traction triggering component structure in Embodiment 2; Figure 17 This is a schematic diagram of the separation of the traction triggering component in Embodiment 2; Figure 18 This is a schematic diagram of the structure of the baby stroller of the present invention (folded state). Figure 19 This is a schematic diagram of the folding process of the baby stroller of the present invention.

[0018] In the diagram: 1. Rear wheel assembly; 2. Rotating point block; 3. Front wheel assembly; 4. Push handle assembly; 41. Push handle upper tube; 42. Push handle lower tube; 5. Seat support rod; 6. Seat rod; 7. Lower connecting rod; 8. Transmission plate; 9. Rear basket rod; 10. Front basket rod; 11. Connecting rod; 12. Support body; 13. Backrest panel; 14. Rotating component; 15. Torsion spring; 16. Headrest plate; 17. Locking rod; 18. Traction wire; 19. Return spring; 20. Groove. 21. Limiting rod; 22. Fixed wheel block; 23. Guide wheel; 24. First storage area; 25. Second storage area; 26. Bolt hole; 27. Backrest adjustment assembly; 271. Adjusting rod; 28. First strip hole; 29. ​​Second strip hole; 30. Folding trigger assembly; 100. Traction trigger assembly; 101. Stabilizer; 102. Backrest limiting component; 103. Stabilizing wire component; 104. Hollow block; 105. Guide strip hole; 106. Guide rod; 107. Path hole. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the invention's purpose, features, and advantages. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but are merely illustrative of the essential spirit of the invention's technical solution.

[0020] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0021] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0022] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0023] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0024] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] See Figures 1-19 As shown, the present invention provides a four-fold stroller with an automatically folding headrest, comprising a four-fold stroller frame, wherein the four-fold stroller frame includes a rear wheel assembly 1, a rotating block 2, a front wheel assembly 3, a push handle assembly 4, a seat cushion rod 6, a lower connecting rod 7, a basket assembly, a backrest panel 13, a headrest panel 16, and a folding trigger assembly 30; wherein, one end of the seat cushion rod 6 of the four-fold stroller frame is connected to a traction trigger assembly 100, the traction trigger assembly 100 is movably connected to the lower connecting rod 7 of the four-fold stroller frame, and a traction positioning assembly is connected to the surface of the backrest panel 13 of the four-fold stroller frame, the traction positioning assembly being used to lock or unlock the headrest panel 16 of the four-fold stroller frame; When the four-fold trolley frame is unlocked, the frame folds under the action of gravity. During the folding process, the seat cushion rod 6 and the backrest 13 can move relative to each other and trigger the traction trigger component 100. After the traction trigger component 100 is triggered, it can drive the traction positioning component so that when the four-fold trolley frame is about to be folded, the headrest 16 and the backrest 13 are unlocked, realizing the folding and closing of the headrest 16 toward the backrest 13.

[0026] As a further step, one end of the lower connecting rod 7 is movably connected to the push handle assembly 4 of the four-fold trolley frame, and the other end of the lower connecting rod 7 is movably connected to the rear wheel assembly 1 of the four-fold trolley frame. The other end of the lower connecting rod 7 is movably connected to the basket assembly via the transmission plate 8. The basket assembly is movably connected to the rear wheel assembly 1 and the front wheel assembly 3 of the four-fold trolley frame. The end of the rear wheel assembly 1 is fixedly connected to the rotating point block 2. The rear wheel assembly 1 is rotatably connected to the front wheel assembly 3 and the push handle assembly 4 via the rotating point block 2. The rotating point block 2 is movably connected to the seat support rod 6 via the seat support rod 5.

[0027] As a further step, the basket assembly includes a rear basket pole 9 rotatably connected to the rear wheel assembly 1 and a front basket pole 10 rotatably connected to the front wheel assembly 3, with one end of the rear basket pole 9 being movably connected to one end of the front basket pole 10.

[0028] See Figure 1 As shown, the rotating block 2 is fixedly connected to the end of the rear wheel assembly 1, while the ends of the front wheel assembly 3 and the push handle assembly 4 are movably mounted on the rotating block 2. The rear wheel assembly 1, front wheel assembly 3, and push handle assembly 4 are all U-shaped. The rear wheel assembly 1 has two rear wheels fixedly mounted on it, along with a brake pedal for locking and unlocking the rear wheels. The front wheel assembly 3 has two front wheels fixedly mounted on it, which are steering wheels with angle limits. It should be noted that the rear wheel assembly 1 and front wheel assembly 3 can both be based on existing structures, which will not be elaborated upon in this paper.

[0029] See Figures 1-3 As shown, the entire push handle assembly 4 can be of existing structure, mainly including a push rod, two upper push handle tubes 41 fixedly connected to the end of the push rod, and a lower push handle tube 42 rotatably connected to the upper push handle tubes 41. A folding trigger assembly 30 is provided on the push rod, which is used to lock or unlock the connection between the upper push handle tubes 41 and the lower push handle tubes 42. When the folding trigger assembly 30 unlocks the connection between the upper push handle tubes 41 and the lower push handle tubes 42, the upper push handle tubes 41 and the lower push handle tubes 42 can rotate relative to each other around the hinge point; and when the folding trigger assembly 30 locks the connection between the upper push handle tubes 41 and the lower push handle tubes 42... The upper tube 41 and lower tube 42 of the push handle can form a straight push handle tube. It should be noted that the entire folding trigger assembly 30 can be a currently available structure. Its general principle is as follows: when pressure is applied to the trigger switch, the trigger switch can drive the locking structure to disengage from the positioning structure at the connection between the upper tube 41 and lower tube 42 of the push handle through a linkage structure, allowing the upper tube 41 and lower tube 42 of the push handle to rotate relative to each other around the hinge point. Conversely, when the pressure on the trigger switch is released, the locking structure can be reset to the positioning structure through the force of the reset structure, achieving a fixed connection between the upper tube 41 and lower tube 42 of the push handle, ensuring that they cannot rotate. Furthermore, this invention does not aim to protect the structure of the folding trigger assembly 30. The folding trigger assembly 30 is a publicly known technology in the field, widely used in strollers. Although not described in detail herein, those skilled in the art can use it skillfully based on common knowledge. The upper end of the lower connecting rod 7 is movably connected to the upper tube 41 of the push handle, which is also a publicly known technology; specific details can be found in the patents mentioned in the background section.

[0030] See Figure 10As shown, the surface of the rotating block 2 is provided with a first storage area 24 and a second storage area 25. The end of the push handle lower tube 42 away from the push handle upper tube 41 is rotatably connected to the first storage area 24, and the end of the front wheel assembly 3 is rotatably connected to the second storage area 25. This design ensures that the front wheel assembly 3 and the push handle assembly 4 can be folded and stored.

[0031] See Figure 9 As shown, the end of the seat cushion rod 6 is movably connected to the lower connecting rod 7. (See also...) Figure 2 As shown, at the hinge point where the lower end of the lower connecting rod 7 is movably connected to the transmission plate 8, it also has a hinge point that is rotatably connected to the rear wheel assembly 1. Therefore, one end of the lower connecting rod 7 is movably connected to the rear wheel assembly 1 of the four-fold trolley frame. When the push handle assembly 4 is driven by gravity to move the lower connecting rod 7, the lower connecting rod 7 can rotate with the hinge point of the rear wheel assembly 1 as the center, so as to realize that the lower connecting rod 7 drives the end of the rear basket rod 9 to move upward through the transmission plate 8.

[0032] See Figures 1-13 As shown, as a further step, the traction positioning assembly includes a support body 12 connected to the surface of the backrest panel 13, a locking rod 17 and a limiting rod 21 disposed in the inner cavity of the support body 12, a return spring 19 located between the locking rod 17 and the limiting rod 21, a rotating member 14 installed at one end of the support body 12, and a traction wire 18 connected to one end of the locking rod 17; the traction triggering assembly 100 is used to drive the traction wire 18 to disengage the locking head of the locking rod 17 from the slot 20 of the rotating member 14; the return spring 19 is used to drive the locking head of the locking rod 17 to insert into the slot 20 of the rotating member 14; and a torsion spring 15 is provided between the support body 12 and the rotating member 14, and the rotating member 14 drives the headrest panel 16 to fold and retract through the force of the torsion spring 15.

[0033] Specifically, one end of the seat cushion rod 6 is connected to the traction trigger assembly 100, one end of the support body 12 is rotatably connected to the inside of the traction trigger assembly 100, and the end of the support body 12 away from the traction trigger assembly 100 is a rotating part 14, on which a headrest plate 16 is fixedly installed.

[0034] When the four-fold trolley frame is in use, the locking rod 17 has a first working state and a second working state. When the locking rod 17 is in the first working state, one end of the locking rod 17 is inserted into the slot 20 on the rotating part 14, and the headrest 16 is in an unfolded and stable state. When the locking rod 17 is in the second working state, one end of the locking rod 17 disengages from the inside of the slot 20 and retracts into the inside of the support body 12, and the headrest 16 is in a folded and stored state. The traction trigger assembly 100 is used to drive the traction wire 18, so that the traction wire 18 pulls the locking rod 17 to switch to the second working state. The return spring 19 is used to push the locking rod 17, so that the locking rod 17 switches to the first working state. Thus, the traction positioning assembly can not only ensure the folding and storage of the headrest 16, but also ensure the stability of the headrest 16 after it is unfolded.

[0035] See Figure 4-9 As shown, the limiting rod 21 located in the inner cavity of the support body 12 is slidably disposed inside the support body 12. The end of the return spring 19 away from the locking rod 17 abuts against one end of the limiting rod 21, and the surface of the limiting rod 21 is provided with a limiting groove along the axial direction. The movement path of the traction wire 18 is located in the limiting groove.

[0036] As further, see Figure 5 , Figure 6 and Figure 8 As shown, a backrest adjustment assembly 27 is provided on the back of the backrest panel 13. The end of the adjustment rod 271 of the backrest adjustment assembly 27 passes through the limiting rod 21 and is located in the backrest limiting member 102 of the traction trigger assembly 100. A second strip hole 29 is provided through the surface of the support body 12. The end of the adjustment rod 271 passes through the second strip hole 29 and then passes through the limiting rod 21.

[0037] The backrest adjustment assembly 27 can be based on existing structures, mainly including a latch with torsional elasticity, a vertical rod connected to the latch, and a horizontal rod connected to the vertical rod, i.e., adjustment rod 271. When the latch is moved, the vertical rod can drive the adjustment rod 271 to move. The adjustment rod 271 drives the limiting rod 21 to press the return spring 19 and slide within the support body 12. This allows one end of the adjustment rod 271 to be adjusted within multiple angle limiting slots of the backrest limiting member 102. Finally, with the force of the return spring 19 pushing the limiting rod 21, the adjustment rod 271 can be limited within the corresponding angle limiting slot, realizing the angle adjustment of the backrest panel 13. See details below. Figure 1 Adjust the backrest 13 to Figure 3 The state in.

[0038] As further, see Figures 11-13As shown, the surface of the support body 12 is provided with a bolt hole 26 for installing a limit bolt, and the surface of the locking rod 17 is provided with a first strip hole 28, and the limit bolt (not shown) for installation in the bolt hole 26 is provided on the inner side of the first strip hole 28. By providing the first strip hole 28 on the locking rod 17, on the one hand, when the return spring 19 pushes the locking rod 17 under elastic force, the limit bolt can limit the locking rod 17; on the other hand, when the locking rod 17 is pulled by the traction wire 18, the locking rod 17 can slide inside the support body 12, thereby allowing the locking head of the locking rod 17 to disengage from the slot 20 of the rotating member 14, ensuring that the rotating member 14 drives the head plate 16 to retract under the torsional elastic force of the torsion spring 15.

[0039] As a first embodiment See Figures 1-12 The traction triggering assembly 100 includes a stabilizing member 101 fixedly connected to the seat cushion rod 6 and a backrest limiting member 102 movably connected to the stabilizing member 101. The support body 12 is rotatably connected to the backrest limiting member 102. The backrest limiting member 102 is movably connected to the lower connecting rod 7 through the connecting rod 11, and the end of the traction wire 18 away from the locking rod 17 is locked in the stabilizing member 101.

[0040] As a further step, a fixed wheel block 22 is integrally formed on the backrest limiting member 102, and a guide wheel 23 is installed inside the fixed wheel block 22. The movement path of the traction wire 18 is located in the groove of the guide wheel 23. The design of the guide wheel 23 makes the traction wire 18 move more smoothly, ensuring the stability of the headrest plate 16 when it is closed.

[0041] As a further step, the fixed wheel block 22 on the backrest limiting member 102 is close to an arc-shaped area of ​​the stabilizing member 101; a slot for placing one end contact of the traction wire 18 is provided on the side of the stabilizing member 101 opposite to the arc-shaped area; a thread opening communicating with the slot is provided on the surface of the stabilizing member 101, and the traction wire 18 enters the interior of the support body 12 after passing through the thread opening and the groove of the guide wheel 23 from one end contact.

[0042] As a further step, when the stabilizing member 101 and the backrest limiting member 102 rotate relative to each other around the hinge point, the traction wire 18 is driven and pulls the locking rod 17, causing the locking head of the locking rod 17 to disengage from the slot 20 of the rotating member 14.

[0043] In this embodiment, see Figure 1As shown, when the stroller frame (i.e., the four-fold stroller frame) is fully unfolded and locked, the upper tube 41 and lower tube 42 of the push handle are in a straight tube state and are locked by the structure formed by the folding trigger assembly 30, so that the seat cushion rod 6, basket rod, backrest 13 and headrest 16 are all in an unfoldable application state; when the headrest 16 is in the unfolded state, the return spring 19 mainly pushes the locking rod 17, so that one end of the locking rod 17 is inserted into the slot 20 of the rotating part 14, thereby limiting the circumferential rotation of the rotating part 14.

[0044] In this embodiment, see Figure 1-12 as well as Figure 19 As shown, when the stroller frame (i.e., the four-fold stroller frame) needs to be folded, pressure is first applied to the trigger switch of the folding trigger assembly 30, so that the upper tube 41 and the lower tube 42 of the push handle can rotate around the hinge point; during this period, the push handle assembly 4 falls downwards under its own weight, so that the lower tube 42 of the push handle and the lower connecting rod 7 move at a hinge point, that is, the lower tube 42 of the push handle moves at the hinge point with the rotating block 2, and the lower connecting rod 7 moves at the hinge point with the rear wheel assembly 1; subsequently, the lower connecting rod 7 can simultaneously drive the seat cushion rod 6 and the transmission plate 8, the seat cushion rod 6 can simultaneously drive the seat cushion support rod 5, the transmission plate 8 can simultaneously drive the rear basket rod 9, the rear basket rod 9 can simultaneously drive the front basket rod 10, and the front basket rod 10 can simultaneously drive the front wheel assembly 3, so as to achieve the effect of folding the stroller frame.

[0045] It should be noted that, in this embodiment, the unfolding and folding of the present invention is described by the backrest panel 13 being adjusted to the first limit angle by the backrest adjustment assembly 27, that is, according to... Figure 1 The position of the backrest 13 is described; furthermore, in this invention, the hinge point between the end of the cushion rod 6 and the lower connecting rod 7 can be defined as the first hinge point; the hinge point between the lower connecting rod 7 and the transmission plate 8 can be defined as the second hinge point; and the hinge point between the lower connecting rod 7 and the connecting rod 11 can be defined as the third hinge point (see...). Figure 9 (As shown); the hinge point between the connecting rod 11 and the backrest limiting member 102 can be designated as the fourth hinge point (see...). Figure 9 (As shown); the hinge point between the stabilizer 101 and the backrest limiting member 102 can be designated as the fifth hinge point (see...). Figure 8 (As shown); the hinge point between the lower link 7 and the rear wheel assembly 1 can be defined as the sixth hinge point.

[0046] See Figure 1-12 as well as Figure 19As shown, when the stroller frame is folded halfway (i.e., almost fully folded), the spatial relationship between the backrest 13 and the lower connecting rod 7 will form a certain angle. Specifically: when the lower connecting rod 7 descends, it can drive the end of the seat cushion rod 6 to descend through the hinge point at the end of the seat cushion rod 6. That is, at this time, the first hinge point and the fifth hinge point sink synchronously, and the fifth hinge point moves closer to the lower connecting rod 7; during the sinking of the first hinge point, the second hinge point rises with the sixth hinge point as the center. When the second hinge point rises, the position of the third hinge point can be higher than the first hinge point. At the same time, the position of the third hinge point can also be higher than the fourth hinge point; and based on this, as the lower connecting rod 7 continues to descend, the backrest limiting member 102 can... The movement at the fifth hinge point causes the fixed wheel block 22 to rotate upward in the arc-shaped area of ​​the stabilizing member 101. As the fixed wheel block 22 rotates upward, the traction wire 18 is pulled. When the traction wire 18 is pulled, the locking rod 17 moves, causing the locking head of the locking rod 17 to disengage from the slot 20 of the rotating member 14. When the rotating member 14 is in the unlocked state, the force of the torsion spring 15 allows the rotating member 14 to rotate relative to one end of the support body 12, achieving the effect of the rotating member 14 driving the headrest plate 16 to fold and retract towards the backrest plate 13. This ensures that the headrest plate 16 folds and retracts synchronously when the vehicle is folded down with one click, reducing the need for manual operation and improving the user experience.

[0047] In this embodiment, see Figure 18-19 As shown, when the stroller frame is fully folded, the headrest 16 is folded and stored, thus preventing the headrest 16 from contacting the ground and being damaged when the frame is folded.

[0048] As a second embodiment See Figures 1-5 and Figures 14-17 As shown, the structure of this embodiment is largely the same as that of Embodiment 1. The only difference is that the traction triggering component 100 includes a stabilizing member 101 fixedly connected to the seat cushion rod 6 and a backrest limiting member 102 movably connected to the stabilizing member 101. The support body 12 is rotatably connected to the backrest limiting member 102. The backrest limiting member 102 is movably connected to the lower connecting rod 7 through the connecting rod 11. A stabilizing wire member 103 is slidably arranged inside the backrest limiting member 102. One end of the traction wire 18 away from the locking rod 17 is locked in the stabilizing wire member 103. When the stabilizing member 101 and the backrest limiting member 102 rotate relative to each other around the hinge point, the stabilizing wire member 103 slides within the backrest limiting member 102 and drives the traction wire 18 to pull the locking rod 17, causing the locking head of the locking rod 17 to disengage from the slot 20 of the rotating member 14.

[0049] See Figures 15-17As shown, as a further step, a hollow block 104 for insertion into the stabilizing member 101 is integrally formed on the backrest limiting member 102. The stabilizing wire member 103 is slidably disposed on the inner side of the hollow block 104, and a guide strip hole 105 communicating with its inner cavity is opened on the surface of the hollow block 104. A guide rod 106 fixedly connected to the stabilizing wire member 103 is provided in the guide strip hole 105. A path hole 107 is opened on the surface of the stabilizing member 101, and the end of the guide rod 106 extends to the inner side of the path hole 107.

[0050] In this embodiment, see Figure 1 As shown, when the stroller frame (i.e., the four-fold stroller frame) is fully unfolded and locked, the upper tube 41 and lower tube 42 of the push handle are in a straight tube state and are locked by the structure formed by the folding trigger assembly 30, so that the seat cushion rod 6, basket rod, backrest 13 and headrest 16 are all in an unfoldable application state; when the headrest 16 is in the unfolded state, the return spring 19 mainly pushes the locking rod 17, so that one end of the locking rod 17 is inserted into the slot 20 of the rotating part 14, thereby limiting the circumferential rotation of the rotating part 14.

[0051] In this embodiment, see Figures 1-12 as well as Figure 19 As shown, when the stroller frame (i.e., the four-fold stroller frame) needs to be folded, pressure is first applied to the trigger switch of the folding trigger assembly 30, so that the upper tube 41 and the lower tube 42 of the push handle can rotate around the hinge point; during this period, the push handle assembly 4 falls downwards under its own weight, so that the lower tube 42 of the push handle and the lower connecting rod 7 move at a hinge point, that is, the lower tube 42 of the push handle moves at the hinge point with the rotating block 2, and the lower connecting rod 7 moves at the hinge point with the rear wheel assembly 1; subsequently, the lower connecting rod 7 can simultaneously drive the seat cushion rod 6 and the transmission plate 8, the seat cushion rod 6 can simultaneously drive the seat cushion support rod 5, the transmission plate 8 can simultaneously drive the rear basket rod 9, the rear basket rod 9 can simultaneously drive the front basket rod 10, and the front basket rod 10 can simultaneously drive the front wheel assembly 3, so as to achieve the effect of folding the stroller frame.

[0052] It should be noted that, in this embodiment, the unfolding and folding of the present invention is described by the backrest panel 13 being adjusted to the first limit angle by the backrest adjustment assembly 27, that is, according to... Figure 1 The position of the backrest 13 is described; furthermore, in this invention, the hinge point between the end of the cushion rod 6 and the lower connecting rod 7 can be defined as the first hinge point; the hinge point between the lower connecting rod 7 and the transmission plate 8 can be defined as the second hinge point; and the hinge point between the lower connecting rod 7 and the connecting rod 11 can be defined as the third hinge point (see...). Figure 9 (As shown); the hinge point between the connecting rod 11 and the backrest limiting member 102 can be defined as the fourth hinge point; the hinge point between the stabilizing member 101 and the backrest limiting member 102 can be defined as the fifth hinge point (see...). Figure 15(As shown); the hinge point between the lower link 7 and the rear wheel assembly 1 can be defined as the sixth hinge point.

[0053] In this embodiment, see Figures 14-17 as well as Figure 19 As shown, when the stroller frame is folded halfway (i.e., about to be fully folded), the backrest 13 and the lower connecting rod 7 will form a certain angle. Specifically, when the lower connecting rod 7 descends, it can drive the end of the seat cushion rod 6 to descend through the hinge point at the end of the seat cushion rod 6. That is, at this time, the first hinge point and the fifth hinge point sink synchronously, and the fifth hinge point moves closer to the lower connecting rod 7. During the sinking of the first hinge point, the second hinge point rises with the sixth hinge point as the center. When the second hinge point rises, the position of the third hinge point can be higher than the first hinge point. At the same time, the position of the third hinge point can also be higher than the fourth hinge point. Based on this, as the lower connecting rod 7 continues to descend, the backrest limiting member 102 can move at the fifth hinge point, so that the backrest limiting member 102 drives the hollow block 104 to the stabilizing member 101. The guide rod 106 slides within the path groove. During the sliding, the design of the path hole 107 allows the guide rod 106 to move within the path hole 107. Thus, the guide rod 106 can drive the stabilizing wire 103 to slide within the hollow block 104, and when the stabilizing wire 103 slides, it can pull the traction wire 18. When the traction wire 18 is pulled, it can drive the locking rod 17 to move, causing the locking head of the locking rod 17 to disengage from the slot 20 of the rotating part 14. Then, when the rotating part 14 is in the unlocked state, the force of the torsion spring 15 allows the rotating part 14 to rotate relative to one end of the support body 12, realizing the effect of the rotating part 14 driving the headrest plate 16 to fold and retract, ensuring that the headrest plate 16 retracts synchronously when the vehicle is retracted with one click, reducing the process of separate manual operation and improving the user experience.

[0054] In this embodiment, see Figure 18-19 As shown, when the stroller frame is fully folded, the headrest 16 is folded and stored away, thus preventing the headrest 16 from contacting the ground and being damaged when the frame is folded. The stroller frame can stand upright when fully folded.

[0055] In summary, this invention, through the cooperation of the traction positioning component and the traction triggering component 100, achieves the effect of simultaneously folding the headrest 16 during the four-folding process of the stroller frame. This solves the problem of traditional baby strollers requiring manual operation of the headrest 16, resulting in a cumbersome and complex folding process, and effectively improves the user experience. The traction positioning component and traction triggering component 100 of this invention have a compact structure, ingenious design, and reasonable overall layout, effectively improving the practicality and reliability of the product.

[0056] It is worth noting that, see Figure 9As shown, a protruding connecting shaft is provided on the backrest limiting member 102, and the connecting rod 11 is movably connected to the protruding connecting shaft. The end of the seat cushion rod 6 and the lower connecting rod 7 at the hinge is close to the outer wall of the protruding connecting shaft.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A four-fold stroller with an automatically collapsible headrest, comprising a four-fold stroller frame, characterized in that: One end of the seat cushion rod (6) of the four-fold trolley frame is connected to a traction trigger assembly (100). The traction trigger assembly (100) is movably connected to the lower connecting rod (7) of the four-fold trolley frame. The backrest plate (13) of the four-fold trolley frame is connected to a traction positioning assembly. The traction positioning assembly is used to lock or unlock the headrest plate (16) of the four-fold trolley frame. When the four-fold trolley frame is unlocked, the frame folds under the action of gravity; During the folding process, the seat cushion rod (6) and the backrest (13) can move relative to each other and trigger the traction triggering component (100). After the traction triggering component (100) is triggered, it can drive the traction positioning component so that when the four-fold trolley frame is about to be folded, the headrest (16) and the backrest (13) are unlocked, so that the headrest (16) can be folded and closed towards the backrest (13).

2. The four-fold baby stroller with automatically collapsible headrest according to claim 1, characterized in that: The traction positioning assembly includes a support body (12) connected to the surface of the backrest (13), a locking rod (17) and a limiting rod (21) disposed in the inner cavity of the support body (12), a return spring (19) located between the locking rod (17) and the limiting rod (21), a rotating component (14) installed at one end of the support body (12), and a traction wire (18) connected to one end of the locking rod (17); the traction trigger assembly (100) is used to drive the traction wire (18) to disengage the locking head of the locking rod (17) from the slot (20) of the rotating component (14); the return spring (19) is used to drive the locking head of the locking rod (17) to insert into the slot (20) of the rotating component (14); and a torsion spring (15) is provided between the support body (12) and the rotating component (14), and the rotating component (14) is driven by the torsion spring (15) to fold and retract the headrest (16).

3. The four-fold baby stroller with automatically folding headrest as described in claim 2, characterized in that: The traction triggering assembly (100) includes a stabilizing member (101) fixedly connected to the seat cushion rod (6) and a backrest limiting member (102) movably connected to the stabilizing member (101). The support body (12) is rotatably connected to the backrest limiting member (102). The backrest limiting member (102) is movably connected to the lower connecting rod (7) through the connecting rod (11). The end of the traction wire (18) away from the locking rod (17) is locked in the stabilizing member (101). When the stabilizing member (101) and the backrest limiting member (102) rotate relative to each other around the hinge point, the traction wire (18) is driven and pulls the locking rod (17), causing the locking head of the locking rod (17) to disengage from the slot (20) of the rotating member (14).

4. The four-fold baby stroller with automatically folding headrest according to claim 3, characterized in that: The backrest limiting member (102) has an integrally formed fixed wheel block (22), and a guide wheel (23) is installed inside the fixed wheel block (22). The movement path of the traction wire (18) is located in the groove of the guide wheel (23).

5. The four-fold baby stroller with automatically folding headrest according to claim 2, characterized in that: The traction triggering assembly (100) includes a stabilizing member (101) fixedly connected to the seat cushion rod (6) and a backrest limiting member (102) movably connected to the stabilizing member (101). The support body (12) is rotatably connected to the backrest limiting member (102). The backrest limiting member (102) is movably connected to the lower connecting rod (7) through a connecting rod (11), and a stabilizing wire is slidably arranged inside the backrest limiting member (102). (103) The end of the traction wire (18) away from the locking rod (17) is locked in the stabilizing wire member (103); when the stabilizing member (101) and the backrest limiting member (102) rotate relative to each other around the hinge point, the stabilizing wire member (103) slides in the backrest limiting member (102) and drives the traction wire (18) to pull the locking rod (17), so that the locking head of the locking rod (17) disengages from the slot (20) of the rotating member (14).

6. The four-fold baby stroller with automatically collapsible headrest according to claim 5, characterized in that: The backrest limiting member (102) has an integrally formed hollow block (104) for insertion into the stabilizing member (101). The stabilizing wire member (103) is slidably disposed on the inner side of the hollow block (104). The surface of the hollow block (104) is provided with a guide strip hole (105) communicating with its inner cavity. The guide strip hole (105) is provided with a guide rod (106) fixedly connected to the stabilizing wire member (103). The surface of the stabilizing member (101) is provided with a path hole (107). The end of the guide rod (106) extends to the inner side of the path hole (107).

7. The four-fold baby stroller with automatically folding headrest according to claim 1, characterized in that: One end of the lower connecting rod (7) is movably connected to the push handle assembly (4) of the four-fold trolley frame, and the other end of the lower connecting rod (7) is movably connected to the rear wheel assembly (1) of the four-fold trolley frame. The other end of the lower connecting rod (7) is movably connected to the basket assembly via the transmission plate (8). The basket assembly is movably connected to the rear wheel assembly (1) and the front wheel assembly (3) of the four-fold trolley frame. The end of the rear wheel assembly (1) is fixedly connected to the rotating point block (2). The rear wheel assembly (1) is rotatably connected to the front wheel assembly (3) and the push handle assembly (4) via the rotating point block (2). The rotating point block (2) is movably connected to the seat support rod (6) via the seat support rod (5).

8. The four-fold baby stroller with automatically collapsible headrest according to claim 7, characterized in that: The basket assembly includes a rear basket rod (9) rotatably connected to the rear wheel assembly (1) and a front basket rod (10) rotatably connected to the front wheel assembly (3), with one end of the rear basket rod (9) being movably connected to one end of the front basket rod (10).

9. The four-fold baby stroller with automatically folding headrest according to claim 7, characterized in that: The push handle assembly (4) includes a push rod, an upper push handle tube (41) connected to the push rod, and a lower push handle tube (42) rotatably connected to the upper push handle tube (41). A folding trigger assembly (30) is provided on the push rod. The folding trigger assembly (30) is used to lock or unlock the connection between the upper push handle tube (41) and the lower push handle tube (42). When the folding trigger assembly (30) makes the connection between the upper push handle tube (41) and the lower push handle tube (42) in an unlocked state, the upper push handle tube (41) and the lower push handle tube (42) can rotate relative to each other around the hinge point, and the upper end of the lower connecting rod (7) is movably connected to the upper push handle tube (41).

10. The four-fold baby stroller with automatically collapsible headrest according to claim 9, characterized in that: The surface of the rotating block (2) is provided with a first storage area (24) and a second storage area (25). The end of the push handle lower tube (42) away from the push handle upper tube (41) is rotatably connected in the first storage area (24), and the end of the front wheel assembly (3) is rotatably connected in the second storage area (25).

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