Baby carriage frame assembly and baby carriage

Abstract

The stroller frame assembly comprises a main stroller frame, the main stroller frame comprises a hand push rod set and two rear foot rods, the hand push rod set comprises two supporting rods, the supporting rod on each side comprises a first rod section and a second rod section, the first end of the first rod section is rotatably connected with the rear foot rod on the same side, and the second end of the first rod section is rotatably connected with the rear foot rod on the same side; the first end of the second rod section is rotatably connected with the second end of the first rod section, and the first rod section on each side is movably provided with a sliding piece; the left and right ends of the handrail assembly are connected to the sliding pieces on the two sides respectively; the rear end of the seat assembly is connected to the bottoms of the supporting rods on the two sides. The backrest assembly comprises a first backrest part and a second backrest part, the first end of the first backrest part is connected to the rear end of the seat assembly, and the first end of the second backrest part is rotatably connected to the second end of the first backrest part; in the folding state, the second backrest part is folded towards the front side relative to the first backrest part, the first rod section is close to the rear foot rod, and the second rod section is folded towards the side close to the armrest assembly relative to the first rod section.

Description

Technical Field

[0001] This disclosure relates to the field of children's products technology, and in particular to a stroller frame assembly and a stroller. Background Technology

[0002] To facilitate carrying or storage, or to meet the size requirements for taking it on airplanes, current strollers require folding frames. In addition, to improve the comfort of the backrest when riding, the length of the backrest bar is increased. However, the additional length of the backrest bar increases the size when folded. To achieve the required folding size, the current frame folding mechanism is quite complex, requiring complicated operation steps, making it difficult and inconvenient to operate. Utility Model Content

[0003] The embodiments of this disclosure provide a stroller frame assembly and a stroller that allow for easier folding of the frame assembly.

[0004] One embodiment of this disclosure provides a stroller frame assembly, comprising:

[0005] The main frame includes a push rod assembly and two rear foot rods for mounting the rear wheel assembly. The push rod assembly includes two support rods. Each support rod includes a first rod segment and a second rod segment. The first end of the first rod segment is rotatably connected to the rear foot rod on the same side. The first end of the second rod segment is rotatably connected to the second end of the first rod segment. Each first rod segment on each side is movably provided with a sliding element.

[0006] The armrest assembly has sliding parts connected to both sides at its left and right ends respectively;

[0007] The seat assembly has its rear end connected to the bottom of the support rods on both sides;

[0008] The backrest assembly includes a first backrest and a second backrest, with a first end of the first backrest connected to the rear end of the seat assembly, and a first end of the second backrest rotatably connected to a second end of the first backrest.

[0009] When the stroller frame assembly is folded, the second backrest folds forward relative to the first backrest, the second pole folds toward the side closer to the armrest assembly relative to the first pole, and the first pole moves toward the rear footrest.

[0010] In some embodiments, the first backrest includes first backrest bars located on the left and right sides, and the second backrest includes second backrest bars located on the left and right sides and a second crossbar connecting the tops of the two second backrest bars; the backrest assembly further includes:

[0011] The first operating component is located in the middle area of ​​the second crossbar;

[0012] Two engaging members are located in the connection area between the first and second backrest rods, and the engaging members are movable within the second backrest rod; and

[0013] Two force transmission components, the first end of which is connected to the first operating component, and the second end of which extends inside the second crossbar and the second backrest bar to connect with the first end of the engaging component.

[0014] Specifically, when the first operating component is in the locked state, the second end of the engaging component engages with the first backrest rod; when the first operating component is in the unlocked state, the second end of the engaging component disengages from the first backrest rod.

[0015] In some embodiments, the backrest assembly further includes:

[0016] Two first elastic elements, each disposed between the first backrest rod and the second backrest rod on the same side, are configured to apply an elastic force when the first operating member is in the unlocked state, so as to fold the second backrest relative to the first backrest.

[0017] In some embodiments, the backrest assembly further includes two positioning pins, respectively disposed at the ends of the two second backrest rods away from the second crossbar. The engaging member is provided with a guide groove, which extends along the moving direction of the engaging member. The positioning pins cooperate with the guide groove to provide guidance for the movement of the engaging member.

[0018] In some embodiments, the backrest assembly further includes two second elastic elements, respectively disposed in two second backrest rods, with the first end of the second elastic element fixed and the second end of the second elastic element abutting against the first end of the engaging member;

[0019] When the first operating element is in the locked state, the second elastic element applies an elastic force to the engaging element so that the second end of the engaging element engages with the first backrest rod.

[0020] In some embodiments, the first operating member includes two operating parts, which are spaced apart within the second crossbar and respectively connected to two force transmission members. They are configured to move the two force transmission members to unlock when they approach each other under the action of an external force.

[0021] In some embodiments, the first backrest further includes a first crossbar, the first backrest includes a first rod and a first connecting portion, the first connecting portion is connected to the top end of the first rod, and the first crossbar is connected between the top ends of the two first rods respectively; the second backrest includes a second rod and a second connecting portion, the second connecting portion is connected to the bottom end of the first rod;

[0022] The first connecting part and the second connecting part are hinged together. The first connecting part is provided with a slot. When the first operating member is in the locked state, the second end of the engaging member is embedded in the slot so as to engage with the first backrest rod.

[0023] In some embodiments, a wedge-shaped engagement portion is provided between the slot and the engaging member.

[0024] In some embodiments, the total length of the backrest assembly in the unfolded state is greater than the length of the rear leg bar, and the total length of the backrest assembly in the folded state is less than the length of the rear leg bar.

[0025] A second aspect of this disclosure provides a stroller including the stroller frame assembly described above.

[0026] Based on the above technical solution, the stroller frame assembly of this embodiment allows the seat assembly, backrest assembly, and armrest assembly to be folded together with the main frame after the backrest assembly is folded. That is, folding the main frame can cause other components to fold and fold together, enabling quick and convenient folding of the entire stroller frame assembly. This makes the operation quick and easy to store or carry. Furthermore, folding the backrest assembly before the main frame is folded allows for a larger backrest assembly design, increasing headroom and preventing discomfort for children due to limited headroom, thus improving riding comfort. When folded, the backrest assembly can be folded to a smaller size, preventing fabric from contacting the ground and causing soiling, and significantly reducing the overall volume after folding, easily meeting boarding size requirements. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0028] Figure 1 This is a side view of some embodiments of the stroller frame assembly disclosed herein, in use.

[0029] Figure 2 This is a perspective view of some embodiments of the stroller frame assembly disclosed herein in use.

[0030] Figure 3 This is a structural schematic diagram of some embodiments of the backrest assembly in the stroller frame assembly of this disclosure.

[0031] Figure 4 This is an exploded view of some embodiments of the backrest assembly in the stroller frame assembly of this disclosure.

[0032] Figure 5 Partial cross-sectional view of some embodiments of the backrest assembly.

[0033] Figure 6 The side view of some embodiments of the stroller frame assembly disclosed herein shows that the backrest assembly is folded first when folding is required.

[0034] Figure 7This is a perspective view of some embodiments of the stroller frame assembly disclosed herein, showing the backrest assembly folded first when folding is required.

[0035] Figure 8 The following is a side view of the push-bar assembly, showing some embodiments of the stroller frame assembly as it needs to be folded.

[0036] Figure 9 The following is a perspective view of some embodiments of the stroller frame assembly disclosed herein, with the push rod assembly in place when folding is required.

[0037] Figure 10 This is a side view of some embodiments of the stroller frame assembly disclosed herein in a folded state.

[0038] Figure 11 This is a perspective view of some embodiments of the stroller frame assembly disclosed herein in a folded state.

[0039] Explanation of reference numerals in the attached figures

[0040] 1. Backrest assembly; 11. First backrest back; 111. First rod; 112. First crossbar; 113. First connecting part; 114. Connecting crossbar; 115. Third connecting part; 116. Slot; 12. Second backrest back; 121. Second rod; 122. Second crossbar; 123. Second connecting part; 124. Positioning pin; 13. First operating element; 131. Operating part; 14. Engaging element; 141. Guide groove; 15. First elastic element; 16. Second elastic element;

[0041] 2. Push rod assembly; 21. First section; 22. Second section; 23. Second operating element;

[0042] 3. Handrail assembly;

[0043] 4. Seating assembly; 41. First seat section; 42. Second seat section;

[0044] 5. Rear support bar;

[0045] 6. Rear wheel assembly;

[0046] 7. Front support bar;

[0047] 8. Front wheel assembly;

[0048] 9. Sliding components. Detailed Implementation

[0049] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0050] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0051] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0052] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0053] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0054] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0055] First, this disclosure proposes a stroller frame assembly, such as Figures 1 to 11 As shown, in some embodiments, it includes:

[0056] The main frame includes a push rod assembly 2 and two rear foot rods 5 for mounting the rear wheel assembly 6. The push rod assembly 2 includes two support rods. Each support rod includes a first rod segment 21 and a second rod segment 22. The first end of the first rod segment 21 is rotatably connected to the rear foot rod 5 on the same side. The first end of the second rod segment 22 is rotatably connected to the second end of the first rod segment 21. Each first rod segment 21 on each side is movably provided with a sliding member 9.

[0057] The armrest assembly 3 has its left and right ends connected to the sliding parts 9 on both sides respectively;

[0058] Seat assembly 4, the rear end of which is connected to the bottom of the support rods on both sides;

[0059] The backrest assembly 1 includes a first backrest 11 and a second backrest 12. The first end of the first backrest 11 is connected to the rear end of the seat assembly 4, and the first end of the second backrest 12 is rotatably connected to the second end of the first backrest 11.

[0060] When the stroller frame assembly is folded, the second backrest 12 folds forward relative to the first backrest 11, the second rod segment 22 folds toward the side closer to the armrest assembly 3 relative to the first rod segment 21, and the first rod segment 21 moves toward the rear footrest 5.

[0061] The push rod assembly 2 includes two support rods and a connecting rod. The connecting rod is connected between the tops of the two support rods. The connecting rod may be provided with a second operating element 23, which is configured to allow the second rod segment 22 to rotate relative to the first rod segment 21 when unlocked by an external force.

[0062] Two rear footrests 5 are located on the left and right sides respectively. The bottom end of the rear footrests 5 is connected to the rear wheel assembly 6. The two rear footrests 5 can be connected in the bottom area via a first connecting beam. The main frame also includes two front footrests 7, located on the left and right sides respectively. The bottom end of the front footrests 7 is connected to the front wheel assembly 8. The two front footrests 7 can be connected at the bottom via a second connecting beam. Both the front footrests 7 and the rear footrests 5 are connected to the bottom of the support rod and located below the seat assembly 4. The rear footrests 5 are rotatable relative to the support rod. The top ends of the front footrests 7 and the rear footrests 5 are connected at an angle, and the two are rotatable relative to each other.

[0063] The armrest assembly 3 can be a rod-shaped structure bent into a C-shape, with its left and right ends connected to the sliding members 9 on both sides. The armrest assembly 3 can change position as the sliding members 9 move, adapting to changes in the overall structure when the stroller is folded. The sliding member 9 can be a sliding sleeve that can slide along the length of the first rod segment 21 to adjust its position during the folding and unfolding of the stroller.

[0064] The rear end of the seat assembly 4 is connected to the bottom of the first rod segments 21 on both sides. The seat assembly 4 provides a flat surface for the infant to sit on, with appropriate firmness and support to ensure the infant's comfort. To achieve a smaller folded size, such as... Figure 1 As shown, the seat assembly 4 includes a first seat section 41 and a second seat section 42. The first seat section 41 is fixedly connected to the bottom end of the support rod and is also connected to the bottom of the backrest assembly 1. The second seat section 42 is rotatably connected to the front end of the first seat section 41. Figure 8 As shown, when the frame is folded, the second seat section 42 can rotate downward relative to the first seat section 41.

[0065] The backrest assembly 1 includes a first backrest 11 and a second backrest 12. A first end of the first backrest 11 is connected to the rear end of the first seat section 41, and the bottom end of the second backrest 12 is rotatably connected to the top end of the first backrest 11. Furthermore, the backrest assembly 1 can be adjusted to different angles relative to the seat assembly 4 to accommodate different posture needs of the infant. For example, the length of the second backrest 12 can be less than that of the first backrest 11 to facilitate folding.

[0066] In this embodiment, the hinge shafts at the rotatable connection positions all extend in the left-right direction.

[0067] When this stroller frame assembly needs to be folded, the second backrest 12 is first folded forward relative to the first backrest 11. After the second operating member 23 is applied to unlock it, the second rod segment 22 is folded relative to the first rod segment 21 toward the side closer to the armrest assembly 3 to fold the support rod. When the second rod segment 22 is folded to a preset angle, the slider 9 is unlocked relative to the first rod segment 21, and the first rod segment 21 moves toward the rear leg bar 5. The slider 9 slides upward along the first rod segment 21, causing the front leg bar 7, the second seat segment 42 and the armrest assembly 3 to fold and move closer together.

[0068] In this embodiment, after the backrest assembly 1 is folded, the seat assembly 4, backrest assembly 1, and armrest assembly 3 can be folded together with the main frame. That is, when the main frame is folded, it can drive the other parts to fold together. The entire stroller frame assembly can be folded quickly and conveniently, and the operation is quick and easy to store or carry.

[0069] Furthermore, the backrest assembly 1 is folded before the main frame is folded, allowing the backrest assembly 1 to be designed to be longer, increasing headroom and avoiding discomfort for children due to cramped headroom, thus improving the comfort of riding. When folded, the backrest assembly 1 can be folded to a smaller size, which can prevent the fabric from contacting the ground and causing dirt problems after folding, and significantly reduce the overall volume after folding, making it easy to meet the boarding size requirements.

[0070] In addition, since the backrest assembly 1 has an armrest assembly 3 on the front side, the backrest assembly 1 moves backward and closes to the rear foot bar 5 during the folding process, which can prevent interference with the armrest assembly 3, making it suitable for stroller frame assemblies with armrest assembly 3.

[0071] In some embodiments, such as Figure 3 and Figure 4 As shown, the first backrest 11 includes first backrest rods located on the left and right sides, and the second backrest 12 includes second backrest rods located on the left and right sides and a second crossbar 122 connecting the tops of the two second backrest rods; the backrest assembly 1 also includes:

[0072] The first operating component 13 is located in the middle area of ​​the second crossbar 122;

[0073] Two engaging members 14 are located in the connection area between the first backrest rod and the second backrest rod, and the engaging members 14 are movable within the second backrest rod; and

[0074] Two force transmission components are provided. The first end of the force transmission component is connected to the first operating component 13, and the second end of the force transmission component extends into the second crossbar 122 and the second backrest bar to connect with the first end of the engaging component 14. For example, the force transmission component can be a wire rope or a cable, etc.

[0075] Specifically, when the first operating member 13 is in the locked state, the second end of the engaging member 14 engages with the first backrest rod; when the first operating member 13 is in the unlocked state, the second end of the engaging member 14 disengages from the first backrest rod.

[0076] In this embodiment, a first operating member 13 is provided to lock and unlock the backrest assembly 1. When the first operating member 13 is locked, the second end of the engaging member 14 engages with the first backrest rod, and the first backrest back 11 and the second backrest back 12 are located in the same plane. When the first operating member 13 is unlocked, the second end of the engaging member 14 disengages from the first backrest rod, allowing the second backrest back 12 to fold relative to the first backrest back 11, thereby realizing the folding of the backrest assembly 1.

[0077] In some embodiments, such as Figure 3 and Figure 4 As shown, the backrest assembly 1 further includes two first elastic elements 15, each first elastic element 15 disposed between the first backrest rod and the second backrest rod on the same side, configured to apply an elastic force when the first operating member 13 is in the unlocked state, so as to fold the second backrest 12 relative to the first backrest 11. For example, the first elastic element 15 can be a spring.

[0078] This embodiment enables the second backrest 12 to automatically rotate to a folded position under the pulling force of the first elastic element 15 after the first operating member 13 is unlocked by an external force. This simplifies the folding and unfolding operation of the stroller frame assembly and improves ease of use. Moreover, it also prevents the second backrest 12 from automatically unfolding, increasing the folded size, or causing the fabric to become soiled after folding.

[0079] In some embodiments, such as Figure 5 As shown, the backrest assembly 1 also includes two positioning pins 124, which are respectively located at the ends of the two second backrest rods away from the second crossbar 122. The positioning pins 124 are arranged in the left-right direction. The engaging member 14 is provided with a guide groove 141, which extends along the moving direction of the engaging member 14. The positioning pins 124 cooperate with the guide groove 141 to provide guidance for the movement of the engaging member 14.

[0080] This embodiment, by setting a cooperative structure between the positioning pin 124 and the guide groove 141, can provide guidance for the movement of the locking member 14, so that the locking member 14 moves along a preset path, avoiding jamming or deviation, and improving the reliability of locking or unlocking the backrest assembly 1.

[0081] In some embodiments, the backrest assembly 1 further includes two second elastic elements 16, respectively disposed within two second backrest rods. The first end of the second elastic element 16 is fixed, and the second end of the second elastic element 16 abuts against the first end of the engaging member 14. When the first operating member 13 is in the locked state, the second elastic element 16 applies an elastic force to the engaging member 14 to engage the second end of the engaging member 14 with the first backrest rod. For example, the second elastic element 16 is a spring.

[0082] In this embodiment, by setting a second elastic element 16, when the first operating member 13 is in the locked state, the second elastic element 16 can reliably engage the locking member 14 with the first backrest rod to achieve automatic reset; when the first operating member 13 is in the unlocked state, it can drive the force transmission member to move so that the locking member 14 overcomes the resistance of the second elastic element 16 and disengages from the first backrest rod.

[0083] In some embodiments, such as Figure 4 As shown, the first operating member 13 includes two operating parts 131, which are spaced apart within the second crossbar 122 and respectively connected to two force transmission members. They are configured to move the two force transmission members when brought close together under external force, thereby unlocking the device. This type of first operating member 13 can unlock the device by moving the two force transmission members when brought close together under external force. This dual operating part 131 not only facilitates simultaneous unlocking from both sides but also increases security, preventing the possibility of accidental unlocking.

[0084] In some embodiments, such as Figures 3 to 5As shown, the first backrest 11 also includes a first crossbar 112. The first backrest bar includes a first rod 111 and a first connecting part 113. The first connecting part 113 is connected to the top end of the first rod 111, and the first crossbar 112 is connected between the top ends of the two first rods 111 respectively. The second backrest bar includes a second rod 121 and a second connecting part 123. The second connecting part 123 is connected to the bottom end of the first rod 111.

[0085] The first connecting part 113 and the second connecting part 123 are hinged together. The first connecting part 113 is provided with a slot 116. When the first operating member 13 is in the locked state, the second end of the engaging member 14 is embedded in the slot 116 so as to engage with the first backrest rod.

[0086] Specifically, the first connecting portion 113 may include a first engaging section and a first connecting section connected to each other. The first connecting section extends beyond the first crossbar 112. The cross-section of the first engaging section may be C-shaped and engages with the top end of the first rod 111. The cross-section of the first connecting section is larger than that of the first engaging section. The second connecting portion 123 includes a second engaging section and a second connecting section connected to each other. The second engaging section may be cylindrical and sleeved on the bottom end of the second rod 121. The cross-section of the second connecting section is larger than that of the second engaging section. The first connecting section and the second connecting section are hinged together.

[0087] Furthermore, such as Figure 3 As shown, a third connecting part 115 can be provided at the bottom end of the first rod 111 so that the first rod 111 can be easily hinged to the seat assembly 4. In order to improve the overall rigidity of the backrest assembly 1, the bottom areas of the two first rods 111 can also be connected by a connecting crossbar 114.

[0088] This embodiment can easily connect the first backrest rod and the second backrest rod, improve the reliability of the connection, ensure the stability of the backrest assembly 1 during use, and also facilitate the locking and unlocking of the backrest assembly 1 by setting the locking and unlocking parts 14.

[0089] In some embodiments, a wedge-shaped engagement portion is provided between the slot 116 and the engaging member 14. This structure can enhance the tightness and stability of the engaging member 14 when engaged, and also facilitate the engaging member 14 to smoothly disengage from the slot 116 when unlocking and smoothly enter the slot 116 when locking.

[0090] In some embodiments, such as Figure 8 As shown, the total length of the backrest assembly 1 in the unfolded state is greater than the length of the rear leg bar 5, and the total length of the backrest assembly 1 in the folded state is less than the length of the rear leg bar 5.

[0091] In this embodiment, the backrest assembly 1 is folded before the main frame is folded, so that the length of the backrest assembly 1 in the unfolded state exceeds the length of the rear leg bar 5. The backrest assembly 1 is designed to be longer to increase the headroom, avoid the discomfort caused by the cramped headroom, and improve the comfort of riding. When folded, the backrest assembly 1 can be folded to not exceed the size of the rear leg bar 5, which can prevent the fabric from contacting the ground and causing dirt problems after folding, and greatly reduce the overall volume after folding, making it easy to meet the boarding size.

[0092] The following explains in detail the folding principle of this stroller frame assembly.

[0093] like Figure 6 and Figure 7 As shown, when this stroller frame assembly needs to be folded, the operator brings the two operating parts 131 of the first operating member 13 closer together, which can drive the force transmission members on both sides to move, causing the locking member 14 to overcome the action of the second elastic element 16 and disengage from the slot 116, thereby unlocking the backrest assembly 1. At this time, under the action of the first elastic element 15, the second backrest 12 folds forward relative to the first backrest 11.

[0094] like Figure 8 and Figure 9 As shown, a force is applied to the second operating member 23 to unlock the support rod. The second rod segment 22 folds relative to the first rod segment 21 toward the side closer to the armrest assembly 3 to fold the support rod. When the second rod segment 22 is folded to a preset angle, the slider 9 unlocks relative to the first rod segment 21. The first rod segment 21 moves toward the rear foot bar 5. The slider 9 slides upward along the first rod segment 21, causing the front foot bar 7, the second seat segment 42, and the armrest assembly 3 to fold and move closer together. During the folding process, the second seat segment 42 rotates downward relative to the first seat segment 41.

[0095] like Figure 10 and Figure 11 The stroller frame assembly can be completely folded and stored.

[0096] Secondly, this disclosure provides a stroller, including the stroller frame assembly of the above embodiments. When the backrest assembly 1 is folded, the seat assembly 4, backrest assembly 1, and armrest assembly 3 can be folded together with the main frame. That is, folding the main frame can cause other components to fold and come together, allowing for quick and convenient folding of the entire stroller. This makes the operation quick and easy, facilitating storage or carrying.

[0097] Furthermore, the backrest assembly 1 is folded before the main frame is folded, allowing the backrest assembly 1 to be designed to be longer, increasing headroom and avoiding discomfort for children due to cramped headroom, thus improving the comfort of riding. When folded, the backrest assembly 1 can be folded to a smaller size, which can prevent the fabric from contacting the ground and causing dirt problems after folding, and significantly reduce the overall volume after folding, making it easy to meet the boarding size requirements.

[0098] The foregoing has provided a detailed description of a stroller frame assembly and a stroller as disclosed herein. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of these embodiments are merely illustrative and are intended to aid in understanding the methods and core concepts of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this disclosure.

Claims

1. A stroller frame assembly, characterized by, include: The main frame includes a push rod assembly (2) and two rear foot rods (5) for mounting the rear wheel assembly (6). The push rod assembly (2) includes two support rods. Each support rod includes a first rod segment (21) and a second rod segment (22). The first end of the first rod segment (21) is rotatably connected to the rear foot rod (5) on the same side. The first end of the second rod segment (22) is rotatably connected to the second end of the first rod segment (21). Each first rod segment (21) on each side is movably provided with a sliding member (9). The armrest assembly (3) has its left and right ends connected to the sliding members (9) on both sides respectively. Seat assembly (4), the rear end of which is connected to the bottom of the support rods on both sides; The backrest assembly (1) includes a first backrest (11) and a second backrest (12), with a first end of the first backrest (11) connected to the rear end of the seat assembly (4), and a first end of the second backrest (12) rotatably connected to a second end of the first backrest (11). When the stroller frame assembly is folded, the second backrest (12) folds forward relative to the first backrest (11), the second rod segment (22) folds toward the side closer to the armrest assembly (3) relative to the first rod segment (21), and the first rod segment (21) moves toward the rear footrest (5).

2. The stroller frame assembly of claim 1, wherein, The first backrest (11) includes first backrest rods located on the left and right sides, and the second backrest (12) includes second backrest rods located on the left and right sides and a second crossbar (122) connecting the top ends of the two second backrest rods; the backrest assembly (1) further includes: The first operating element (13) is located in the middle area of ​​the second crossbar (122); Two engaging members (14) are provided in the connection area between the first backrest rod and the second backrest rod, and the engaging members (14) are movable within the second backrest rod; and Two force transmission components, the first end of which is connected to the first operating component (13), and the second end of which extends within the second crossbar (122) and the second backrest bar to be connected to the first end of the engaging component (14); When the first operating member (13) is in the locked state, the second end of the engaging member (14) engages with the first backrest rod; when the first operating member (13) is in the unlocked state, the second end of the engaging member (14) disengages from the first backrest rod.

3. The stroller frame assembly of claim 2, wherein, The backrest assembly (1) also includes: Two first elastic elements (15), each of which is disposed between the first backrest rod and the second backrest rod on the same side, are configured to apply an elastic force when the first operating member (13) is in the unlocked state, so as to fold the second backrest (12) relative to the first backrest (11).

4. The stroller frame assembly of claim 2, wherein, The backrest assembly (1) also includes two positioning pins (124), which are respectively located at the ends of the two second backrest rods away from the second crossbar (122). The engaging member (14) is provided with a guide groove (141), which extends along the moving direction of the engaging member (14). The positioning pins (124) cooperate with the guide groove (141) to provide guidance for the movement of the engaging member (14).

5. The stroller frame assembly according to claim 2, characterized in that, The backrest assembly (1) further includes two second elastic elements (16), which are respectively disposed in the two second backrest rods. The first end of the second elastic element (16) is fixed, and the second end of the second elastic element (16) abuts against the first end of the locking member (14). When the first operating member (13) is in the locked state, the second elastic element (16) applies an elastic force to the engaging member (14) so ​​that the second end of the engaging member (14) engages with the first backrest rod.

6. The stroller frame assembly of claim 2, wherein, The first operating member (13) includes two operating parts (131), which are spaced apart within the second crossbar (122) and connected to the two force transmission members respectively. They are configured to move the two force transmission members to unlock when they approach each other under the action of external force.

7. The stroller frame assembly of claim 2, wherein, The first backrest (11) further includes a first crossbar (112), the first backrest bar includes a first rod (111) and a first connecting part (113), the first connecting part (113) is connected to the top end of the first rod (111), and the first crossbar (112) is connected between the top ends of the two first rods (111); the second backrest bar includes a second rod (121) and a second connecting part (123), the second connecting part (123) is connected to the bottom end of the first rod (111); The first connecting part (113) and the second connecting part (123) are hinged together. The first connecting part (113) is provided with a slot (116). When the first operating member (13) is in the locked state, the second end of the engaging member (14) is embedded in the slot (116) so as to engage with the first backrest rod.

8. The stroller frame assembly of claim 7, wherein, The slot (116) and the engaging member (14) have a wedge-shaped mating part.

9. A pram frame assembly according to any one of claims 1 to 8, wherein, The total length of the backrest assembly (1) in the unfolded state is greater than the length of the rear leg bar (5), and the total length of the backrest assembly (1) in the folded state is less than the length of the rear leg bar (5).

10. A stroller, characterized in that, Includes the stroller frame assembly as described in any one of claims 1 to 9.

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