Baby carriage frame

Abstract

When the baby carriage frame is folded, a frame unlocking mechanism is operated to be in linkage with the unlocking action of a frame locking mechanism so as to relieve the locking state of a push rod assembly relative to a front foot rod or a rear foot rod, and then the push rod assembly is turned over downwards relative to the rear foot rod to rotate towards one side of the rear foot rod to be folded. In the folding process of the push rod assembly, the push rod assembly is in linkage with the front foot rod through the frame linkage assembly to overturn backwards relative to the rear foot rod and rotate towards one side of the rear foot rod to be folded, so that the folding operation of the frame is completed, the whole structure of the folded frame is more compact, the size is minimized, and the requirements for subsequent carrying and storage are met; the folding is convenient and efficient, and the operation is simple and convenient.

Description

Technical field

[0001] The utility model relates to the technical field of baby carriages, in particular to a baby carriage frame. [Background Technology]

[0002] When parents travel with their infants and young children, they typically bring a stroller. Traditional strollers are bulky, lack folding capabilities, or remain quite large even when folded, making them unsuitable for long-distance or extended family trips. Consequently, portable, easily foldable strollers are now widely used as a means of transportation for infants and young children.

[0003] As living standards improve, people's demands for travel convenience are growing. Consequently, the maneuverability and size of a stroller when folded have become key concerns for consumers. More specifically, for foldable strollers, the better the interoperability of the stroller's components, the easier it is to fold and unfold; otherwise, it becomes more laborious. As for the stroller's folded size, it's naturally desirable to keep it as small as possible for easy transport in and out of cars and even on airplanes. Even when stored at home, a smaller size is crucial for minimizing space consumption.

[0004] However, most of the existing strollers still have the following defects:

[0005] 1. It cannot be fully folded. After folding, the stroller still occupies a large volume, which is not conducive to carrying and transporting.

[0006] 2. Complex structure and high production cost.

[0007] 3. The user needs to fold several groups of components separately, which is time-consuming and labor-intensive.

[0008] For this reason, the present invention is studied and proposed in view of the above problems. [Utility Model Content]

[0009] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a baby carriage frame. The frame linkage assembly can make the push rod assembly rotate relative to the rear leg rod and link the front leg rod to rotate and fold relative to the rear leg rod during the folding and retraction process, thereby having the characteristics of convenient and efficient folding and easy operation; in addition, only one set of frame locking mechanisms is needed to cooperate with the frame linkage assembly to lock the frame, the locking is reliable, and the structure is simplified.

[0010] The utility model is realized through the following technical solutions:

[0011] A baby carriage frame, comprising:

[0012] A front foot rod 1, the lower end of which is connected to a front wheel assembly;

[0013] A rear leg rod 2, the lower end of which is connected to a rear wheel assembly, and the upper end of which is directly or indirectly rotatably connected to the upper end of the front leg rod 1;

[0014] A push rod assembly 3, wherein the lower end of the push rod assembly 3 is rotatably connected to the upper end of the front foot rod 1 or the upper end of the rear foot rod 2;

[0015] A frame linkage assembly 4, the frame linkage assembly 4 being located between the front leg rod 1, the rear leg rod 2 and the push rod assembly 3, the frame linkage assembly 4 being configured to link the front leg rod 1 to rotate and fold relative to the rear leg rod 2 when the push rod assembly 3 is rotating and folding relative to the rear leg rod 2;

[0016] A frame locking mechanism 5, the frame locking mechanism 5 being located between the front leg rod 1 and the push rod assembly 3 for locking the push rod assembly 3 relative to the front leg rod 1, or the frame locking mechanism 5 being located between the rear leg rod 2 and the push rod assembly 3 for locking the push rod assembly 3 relative to the rear leg rod 2;

[0017] The frame unlocking mechanism is located on the frame and is used to link the unlocking action of the frame locking mechanism 5, thereby releasing the locking state of the push rod assembly 3 relative to the front leg rod 1 or the rear leg rod 2.

[0018] In the above-mentioned baby carriage frame, the upper end of the front leg rod 1, the upper end of the rear leg rod 2 and the lower end of the push rod assembly 3 are rotatably connected around the same axis.

[0019] In the above-mentioned baby carriage frame, the frame linkage assembly 4 is further configured to link the front leg rod 1 to rotate and unfold relative to the rear leg rod 2 when the push rod assembly 3 rotates and unfolds relative to the rear leg rod 2.

[0020] As described above, the frame of a baby carriage comprises a frame linkage assembly 4 including a frame driving member 41, a rear linkage member 42 and a front linkage member 43. The upper end of the frame driving member 41 is rotatably connected to the lower portion of the push rod assembly 3, the lower end of the frame driving member 41 is rotatably connected to a rear convex portion 421 located in front of the rear linkage member 42 and protruding upward, the rear end of the rear linkage member 42 is rotatably connected to the upper portion of the rear foot rod 2, the front end of the rear linkage member 42 is rotatably connected to the rear end of the front linkage member 43, and the front end of the front linkage member 43 is rotatably connected to the upper portion of the front foot rod 1.

[0021] As described above, a baby carriage frame, the frame locking mechanism 5 is located between the front foot rod 1 and the push rod assembly 3 for locking the push rod assembly 3 relative to the front foot rod 1; the frame locking mechanism 5 includes a frame locking groove 51 respectively provided on the upper end of the front foot rod 1 and the lower end of the push rod assembly 3, and a frame locking gear 52 slidably provided between the upper end of the front foot rod 1 and the lower end of the push rod assembly 3 and capable of simultaneously being engaged with the frame locking groove 51 on the upper end of the front foot rod 1 and the lower end of the push rod assembly 3, and a frame locking gear 52 is provided between the frame locking gear 52 and the upper end of the front foot rod 1 for locking the frame In order to drive the frame locking elastic member 50 to elastically reset the frame locking gear 52, a frame pushing rotating block 53 is rotatably provided between the frame locking gear 52 and the lower end of the push rod assembly 3, and the frame pushing rotating block 53 and the lower end of the push rod assembly 3 are respectively provided with a frame pushing inclined portion 54 for cooperating with each other when the frame pushing rotating block 53 rotates to drive the frame pushing rotating block 53 to push the frame locking gear 52 to slide accordingly; the frame pushing rotating block 53 is configured to be linked to its unlocking action by the frame unlocking mechanism.

[0022] In the above-mentioned baby carriage frame, a guide mechanism 6 is provided between the lower end of the push rod assembly 3 and the upper end of the rear leg rod 2 for guiding the rotation path of the push rod assembly 3 .

[0023] In the above-described baby carriage frame, the guide mechanism 6 includes a guide protrusion 61 provided on the upper end of the rear leg rod 2 or the lower end of the push rod assembly 3 and a guide arc groove 62 correspondingly provided on the lower end of the push rod assembly 3 or the upper end of the rear leg rod 2 and guidingly cooperating with the guide protrusion 61.

[0024] In the above-described baby carriage frame, the guide arc groove 62 has an expansion blocking wall 621 and a folding blocking wall 622. When the guide protrusion 61 blocks and cooperates with the expansion blocking wall 621, the frame is in an expanded use state; when the guide protrusion 61 blocks and cooperates with the folding blocking wall 622, the frame is in a folded use state.

[0025] As described above, in a baby carriage frame, the push rod assembly 3 includes a lower push rod 31 whose lower end is rotatably connected to the upper end of the front foot rod 1 or the upper end of the rear foot rod 2, and an upper push rod 32 is movably connected to the upper end of the lower push rod 31. An upper push rod locking mechanism 33 for locking the upper push rod 32 relative to the lower push rod 31 is provided between the upper push rod 32 and the lower push rod 31, and an upper push rod unlocking mechanism 34 is provided on the upper push rod 32 for linking the unlocking action of the upper push rod locking mechanism 33; the frame unlocking mechanism is configured to be linked by the upper push rod 32 when the upper push rod 32 is movably folded to a preset position relative to the lower push rod 31, thereby linking the frame unlocking mechanism to the unlocking action of the frame locking mechanism 5.

[0026] As described above, the baby carriage frame further includes an armrest assembly 7, which is directly or indirectly connected to the upper end of the rear leg rod 2. The armrest assembly 7 is configured to be arranged upward when the frame is in a standing folded state.

[0027] Compared with the prior art, the utility model has the following advantages:

[0028] 1. When folding the bicycle, the frame unlocking mechanism is operated to link the unlocking action of the frame locking mechanism to release the locking state of the push rod assembly relative to the front leg rod or the rear leg rod, and then the push rod assembly is flipped downward relative to the rear leg rod and rotated toward the side of the rear leg rod to be folded. During the folding process of the above-mentioned push rod assembly, the push rod assembly is linked to the front leg rod through the frame linkage assembly to flip backward relative to the rear leg rod and rotated toward the side of the rear leg rod to be folded, thereby completing the folding operation of the bicycle frame, making the overall structure of the folded bicycle frame more compact and the volume minimized, meeting the needs of subsequent transportation and storage, and also having the characteristics of convenient and efficient folding and easy operation.

[0029] 2. In order to make the overall structure of the frame simpler and more compact after folding, the upper end of the front leg rod, the upper end of the rear leg rod and the lower end of the push rod assembly are rotatably connected around the same axis.

[0030] 3. In order to make the frame linkage efficient and improve the reliability of the frame structure, the frame linkage assembly includes a frame drive member, a rear linkage member and a front linkage member. The upper end of the frame drive member is rotatably connected to the lower part of the push rod assembly, the lower end of the frame drive member is rotatably connected to the rear convex part located in the front part of the rear linkage member and protruding upward, the rear end of the rear linkage member is rotatably connected to the upper part of the rear foot rod, the front end of the rear linkage member is rotatably connected to the rear end of the front linkage member, and the front end of the front linkage member is rotatably connected to the upper part of the front foot rod.

[0031] 4. A guide mechanism is provided between the lower end of the push rod assembly and the upper end of the rear foot rod to guide the rotation path of the push rod assembly, which can ensure that the push rod assembly rotates smoothly relative to the rear foot rod, thereby ensuring that the frame can be retracted and extended smoothly.

[0032] 5. In order to facilitate the folding and positioning of the frame and improve its structural strength, the guide arc groove has an expansion blocking wall and a folding blocking wall for cooperating with the guide protrusion.

[0033] 6. In order to facilitate users to lift, the armrest assembly is configured to be set upward when the frame is in a standing folded use state.

Brief Description of the Drawings

[0034] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0035] Figure 1This is one of the three-dimensional views of the utility model in the unfolded use state.

[0036] Figure 2 This is the second stereoscopic view of the utility model in the unfolded use state.

[0037] Figure 3 It is a side view of the utility model in the unfolded use state.

[0038] Figure 4 It is a side view of the utility model in the folding process.

[0039] Figure 5 It is a side view of the utility model in a folded state for use.

[0040] Figure 6 This is one of the exploded views of the frame locking mechanism in the utility model.

[0041] Figure 7 This is the second exploded view of the frame locking mechanism in the present invention.

[0042] Figure 8 This is a schematic diagram of the utility model in use when it is connected with the seat frame. [Specific implementation method]

[0043] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0044] like Figure 1-8 As shown, the utility model provides a baby carriage frame, comprising:

[0045] A front foot rod 1, the lower end of which is connected to a front wheel assembly;

[0046] A rear leg rod 2, the lower end of which is connected to a rear wheel assembly, and the upper end of which is directly or indirectly rotatably connected to the upper end of the front leg rod 1;

[0047] A push rod assembly 3, wherein the lower end of the push rod assembly 3 is rotatably connected to the upper end of the front foot rod 1 or the upper end of the rear foot rod 2;

[0048] A frame linkage assembly 4, the frame linkage assembly 4 being located between the front leg rod 1, the rear leg rod 2 and the push rod assembly 3, the frame linkage assembly 4 being configured to link the front leg rod 1 to rotate and fold relative to the rear leg rod 2 when the push rod assembly 3 is rotating and folding relative to the rear leg rod 2;

[0049] A frame locking mechanism 5, the frame locking mechanism 5 being located between the front leg rod 1 and the push rod assembly 3 for locking the push rod assembly 3 relative to the front leg rod 1, or the frame locking mechanism 5 being located between the rear leg rod 2 and the push rod assembly 3 for locking the push rod assembly 3 relative to the rear leg rod 2;

[0050] The frame unlocking mechanism is located on the frame and is used to link the unlocking action of the frame locking mechanism 5, thereby releasing the locking state of the push rod assembly 3 relative to the front leg rod 1 or the rear leg rod 2. When folding the present invention, the frame unlocking mechanism is operated to link the unlocking action of the frame locking mechanism to release the locking state of the push rod assembly relative to the front leg rod or the rear leg rod. Then, the push rod assembly flips downward relative to the rear leg rod and rotates toward the side of the rear leg rod to fold. During the folding process of the push rod assembly, the push rod assembly links the front leg rod with the frame linkage assembly to flip backward relative to the rear leg rod and rotate toward the side of the rear leg rod to fold, thereby completing the folding operation of the frame. After folding, the overall structure of the frame is more compact and the volume is minimized, which meets the requirements of subsequent transportation and storage. It also has the characteristics of convenient and efficient folding and simple operation.

[0051] The utility model can lock the frame by using a set of frame locking mechanisms in conjunction with the frame linkage assembly, has the characteristics of reliable locking and simplified structure, and improves market competitiveness.

[0052] The frame unlocking mechanism of the present invention includes, but is not limited to, a frame unlocking member movably mounted on the push rod assembly. The frame unlocking member is linked to the frame locking mechanism 5 via a frame unlocking linkage located within the push rod assembly. During unlocking, the user operates the frame unlocking member relative to the push rod assembly, causing the frame unlocking member to unlock the frame locking mechanism 5 via the frame unlocking linkage. In the present invention, the frame unlocking member is configured to be linked to the upper push rod.

[0053] like Figure 1-8 As shown, in order to make the overall structure of the frame simpler and more compact after folding, the upper end of the front leg rod 1, the upper end of the rear leg rod 2 and the lower end of the push rod assembly 3 are rotatably connected around the same axis.

[0054] In order to facilitate and efficiently deploy, the frame linkage assembly 4 is further configured to link the front leg rod 1 to rotate and deploy relative to the rear leg rod 2 when the push rod assembly 3 is rotated and deployed relative to the rear leg rod 2 .

[0055] like Figure 1-5As shown, in order to make the frame linkage efficient and improve the reliability of the frame structure, the frame linkage assembly 4 includes a frame driving member 41, a rear linkage member 42 and a front linkage member 43. The upper end of the frame driving member 41 is rotatably connected to the lower part of the push rod assembly 3, the lower end of the frame driving member 41 is rotatably connected to the rear convex portion 421 located in the front part of the rear linkage member 42 and protruding upward, the rear end of the rear linkage member 42 is rotatably connected to the upper part of the rear foot rod 2, the front end of the rear linkage member 42 is rotatably connected to the rear end of the front linkage member 43, and the front end of the front linkage member 43 is rotatably connected to the upper part of the front foot rod 1. When folding, the push rod assembly flips downward relative to the rear foot rod, and the push rod assembly drives the front part of the rear linkage member 42 to flip downward around the rotation axis between the rear end of the rear linkage member 42 and the upper part of the rear foot rod 2 through the frame drive member 41. The front end of the rear linkage member 42 drives the rear end of the front linkage member 43 to move downward, that is, the rear linkage member 42 drives the front foot rod 1 to rotate toward the side of the rear foot rod 2 through the front linkage member 43 to fold.

[0056] like Figure 6 、 7 As shown, in order to ensure reliable locking and convenient unlocking, the frame locking mechanism 5 is located between the front foot rod 1 and the push rod assembly 3 for locking the push rod assembly 3 relative to the front foot rod 1; the frame locking mechanism 5 includes a frame locking groove 51 respectively provided on the upper end of the front foot rod 1 and the lower end of the push rod assembly 3, and a frame locking gear 52 slidably provided between the upper end of the front foot rod 1 and the lower end of the push rod assembly 3 and capable of simultaneously engaging with the frame locking groove 51 on the upper end of the front foot rod 1 and the lower end of the push rod assembly 3. A frame locking elastic member 50 is provided for driving the frame locking gear 52 to elastically return to its original position. A frame pushing and rotating block 53 is rotatably provided between the frame locking gear 52 and the lower end of the push rod assembly 3. The frame pushing and rotating block 53 and the lower end of the push rod assembly 3 are respectively provided with a frame pushing inclined portion 54, which is used to mutually abut and cooperate with each other during the rotation of the frame pushing and rotating block 53 to drive the frame pushing and rotating block 53 to push the frame locking gear 52 to slide accordingly. The frame pushing and rotating block 53 is configured to be unlocked in conjunction with the frame unlocking mechanism. In this embodiment, the frame locking mechanism 5 is configured to lock the frame in both the deployed and folded positions. This prevents damage caused by collisions between the rods when the frame is in the folded position, thereby extending the service life of the frame and ensuring the stability and reliability of the frame structure in the folded position, making it easier to transport and store.

[0057] like Figure 6 、 7 As shown, a guide mechanism 6 is provided between the lower end of the push rod assembly 3 and the upper end of the rear foot rod 2 for guiding the rotation path of the push rod assembly 3, which can ensure that the push rod assembly rotates smoothly relative to the rear foot rod, thereby ensuring that the frame can be retracted and extended smoothly.

[0058] like Figure 6 、 7 As shown, in order to ensure smooth and easy guidance, the guiding mechanism 6 includes a guiding protrusion 61 provided on the upper end of the rear foot rod 2 or the lower end of the push rod assembly 3 and a guiding arc groove 62 correspondingly provided on the lower end of the push rod assembly 3 or the upper end of the rear foot rod 2 and cooperating with the guiding protrusion 61.

[0059] like Figure 6 、 7 As shown, in order to facilitate the folding and positioning of the frame and improve its structural strength, the guide arc groove 62 has an expansion blocking wall 621 and a folding blocking wall 622. When the guide protrusion 61 blocks and cooperates with the expansion blocking wall 621, the frame is in an expanded use state; when the guide protrusion 61 blocks and cooperates with the folding blocking wall 622, the frame is in a folded use state.

[0060] like Figure 1-5 As shown, in order to make the overall structure of the folded frame more compact and minimize the volume, the push rod assembly 3 includes a lower push rod 31 whose lower end is rotatably connected to the upper end of the front foot rod 1 or the upper end of the rear foot rod 2, and an upper push rod 32 is movably connected to the upper end of the lower push rod 31. An upper push rod locking mechanism 33 for locking the upper push rod 32 relative to the lower push rod 31 is provided between the upper push rod 32 and the lower push rod 31, and an upper push rod unlocking mechanism 34 for linking the unlocking action of the upper push rod locking mechanism 33 is provided on the upper push rod 32; the frame unlocking mechanism is configured to be linked by the upper push rod 32 when the upper push rod 32 is movably folded to a preset position relative to the lower push rod 31, thereby linking the frame unlocking mechanism to the unlocking action of the frame locking mechanism 5. When folding, the upper push rod unlocking mechanism 34 is operated to unlock the upper push rod locking mechanism 33. The upper push rod is then tilted forward relative to the lower push rod and rotated toward the upper push rod. When the upper push rod is tilted forward relative to the lower push rod to a predetermined position, the upper push rod is engaged with the frame unlocking mechanism, which in turn unlocks the frame locking mechanism 5, making unlocking convenient. In this embodiment, the structure of the upper push rod locking mechanism 33 can be the same as that of the frame locking mechanism. Alternatively, the upper push rod locking mechanism 33 includes, but is not limited to, a locking notch provided at the upper end of the upper push rod and the upper end of the lower push rod, and a locking slider slidably disposed on the upper push rod for locking engagement with the locking notch. A slider elastic member is disposed between the locking slider and the upper push rod to elastically reset the locking slider. The locking slider is unlocked by the upper push rod unlocking mechanism. The upper push rod unlocking mechanism 34 includes, but is not limited to, an unlocking button provided on the upper push rod, which is linked to the locking slider via an unlocking linkage.

[0061] In order to facilitate and efficiently fold, an upper push rod elastic member, such as a torsion spring, is provided between the lower end of the upper push rod and the upper end of the upper push rod for driving the upper push rod to flip forward relative to the lower push rod.

[0062] like Figure 1-5 As shown, in order to facilitate the user to lift and use, the frame also includes an armrest assembly 7, which is directly or indirectly connected to the upper end of the rear foot rod 2. The armrest assembly 7 is configured to be arranged upward when the frame is in a standing folded use state.

Claims

1. A baby carriage frame, characterized in that include: A front foot rod (1), wherein the lower end of the front foot rod (1) is connected to a front wheel assembly; A rear foot rod (2), wherein the lower end of the rear foot rod (2) is connected to a rear wheel assembly, and the upper end of the rear foot rod (2) is directly or indirectly rotatably connected to the upper end of the front foot rod (1); A push rod assembly (3), wherein the lower end of the push rod assembly (3) is rotatably connected to the upper end of the front foot rod (1) or the upper end of the rear foot rod (2); A vehicle frame linkage assembly (4), the vehicle frame linkage assembly (4) being located between the front foot rod (1), the rear foot rod (2) and the push rod assembly (3), the vehicle frame linkage assembly (4) being configured to link the front foot rod (1) to rotate and fold relative to the rear foot rod (2) when the push rod assembly (3) is rotating and folding relative to the rear foot rod (2); A frame locking mechanism (5), wherein the frame locking mechanism (5) is located between the front foot rod (1) and the push rod assembly (3) and is used to lock the push rod assembly (3) relative to the front foot rod (1), or the frame locking mechanism (5) is located between the rear foot rod (2) and the push rod assembly (3) and is used to lock the push rod assembly (3) relative to the rear foot rod (2); A frame unlocking mechanism is located on the frame and is used to link the unlocking action of the frame locking mechanism (5), thereby releasing the locking state of the push rod assembly (3) relative to the front leg rod (1) or the rear leg rod (2).

2. A baby carriage frame according to claim 1, characterized in that The upper end of the front foot rod (1), the upper end of the rear foot rod (2) and the lower end of the push rod assembly (3) are rotatably connected around the same axis.

3. A baby carriage frame according to claim 1, characterized in that The frame linkage assembly (4) is also configured to be used to link the front foot rod (1) to rotate and unfold relative to the rear foot rod (2) when the push rod assembly (3) rotates and unfolds relative to the rear foot rod (2).

4. A baby carriage frame according to claim 1, characterized in that The frame linkage assembly (4) comprises a frame driving member (41), a rear linkage member (42) and a front linkage member (43); the upper end of the frame driving member (41) is rotatably connected to the lower part of the push rod assembly (3); the lower end of the frame driving member (41) is rotatably connected to a rear convex portion (421) located in front of the rear linkage member (42) and protruding upward; the rear end of the rear linkage member (42) is rotatably connected to the upper part of the rear foot rod (2); the front end of the rear linkage member (42) is rotatably connected to the rear end of the front linkage member (43); and the front end of the front linkage member (43) is rotatably connected to the upper part of the front foot rod (1).

5. A baby carriage frame according to claim 1, characterized in that The frame locking mechanism (5) is located between the front foot rod (1) and the push rod assembly (3) and is used to lock the push rod assembly (3) relative to the front foot rod (1); the frame locking mechanism (5) comprises a frame locking groove (51) respectively provided on the upper end of the front foot rod (1) and the lower end of the push rod assembly (3), and a frame locking gear (52) slidably provided between the upper end of the front foot rod (1) and the lower end of the push rod assembly (3) and capable of being simultaneously engaged with the frame locking groove (51) on the upper end of the front foot rod (1) and the lower end of the push rod assembly (3); a locking mechanism (52) is provided between the frame locking gear (52) and the upper end of the front foot rod (1) for locking the frame. A frame locking elastic member (50) is provided for driving the frame locking gear (52) to elastically reset, and a frame pushing rotating block (53) is rotatably provided between the frame locking gear (52) and the lower end of the push rod assembly (3). The frame pushing rotating block (53) and the lower end of the push rod assembly (3) are respectively provided with a frame pushing inclined portion (54) for mutually abutting and cooperating with each other during the rotation process of the frame pushing rotating block (53) to drive the frame pushing rotating block (53) to push the frame locking gear (52) to slide accordingly; the frame pushing rotating block (53) is configured to be linked to the unlocking action of the frame unlocking mechanism.

6. A baby carriage frame according to any one of claims 1 to 5, characterized in that A guide mechanism (6) for guiding the rotation path of the push rod assembly (3) is provided between the lower end of the push rod assembly (3) and the upper end of the rear foot rod (2).

7. A baby carriage frame according to claim 6, characterized in that The guide mechanism (6) comprises a guide protrusion (61) provided on the upper end of the rear foot rod (2) or the lower end of the push rod assembly (3) and a guide arc groove (62) correspondingly provided on the lower end of the push rod assembly (3) or the upper end of the rear foot rod (2) and cooperating with the guide protrusion (61).

8. A baby carriage frame according to claim 7, characterized in that The guide arc groove (62) has an expansion blocking wall (621) and a folding blocking wall (622); when the guide protrusion (61) blocks and cooperates with the expansion blocking wall (621), the frame is in an expanded use state; when the guide protrusion (61) blocks and cooperates with the folding blocking wall (622), the frame is in a folded use state.

9. A baby carriage frame according to any one of claims 1 to 5, characterized in that The push rod assembly (3) comprises a lower push rod (31) whose lower end is rotatably connected to the upper end of the front foot rod (1) or the upper end of the rear foot rod (2); the upper end of the lower push rod (31) is movably connected to an upper push rod (32); an upper push rod locking mechanism (33) for locking the upper push rod (32) relative to the lower push rod (31) is provided between the upper push rod (32) and the lower push rod (31); an upper push rod unlocking mechanism (34) for linking the unlocking action of the upper push rod locking mechanism (33) is provided on the upper push rod (32); the frame unlocking mechanism is configured to be linked to the upper push rod (32) when the upper push rod (32) is movably folded to a preset position relative to the lower push rod (31), thereby linking the frame unlocking mechanism to the unlocking action of the frame locking mechanism (5).

10. A baby carriage frame according to any one of claims 1 to 5, characterized in that The frame further comprises an armrest assembly (7), the armrest assembly (7) being directly or indirectly connected to the upper end of the rear foot rod (2), and the armrest assembly (7) being configured to be arranged upward when the frame is in a standing folded state.

Images