Baby stroller frames and baby strollers

Abstract

The present invention relates to a baby carriage frame and a baby carriage. The baby carriage frame comprises: a frame body, including a folding state and an unfolding state, the frame body including a front leg tube assembly; a front wheel assembly, arranged on the front leg tube assembly; a locking mechanism, arranged on the frame body, the locking mechanism including a locking state and an unlocking state; a linkage mechanism, arranged on the frame body and connected to the front wheel assembly, the linkage mechanism including a positioning state and a non-positioning state; the frame body is configured to maintain the unfolding state when the locking mechanism is in the locking state, and to switch from the unfolding state to the folding state when the locking mechanism is in the unlocking state; the linkage mechanism is configured to switch from the non-positioning state to the positioning state during the process of the frame body switching from the unfolding state to the folding state; the linkage mechanism is configured to be in a positioning state when the frame body is in the folding state, and to position the front wheel assembly. The present invention synchronously positions the front wheel assembly during the frame folding process, thereby improving the stability of the frame after folding.

Description

Technical Field

[0001] The present invention relates to the field of infant products, and in particular to a baby carriage frame and a baby carriage. Background Art

[0002] A baby stroller provides convenience for babies to go out for activities. After the frame of a baby stroller in the related art is folded, the front wheel assembly shakes, which affects the stability of the baby stroller. Summary of the invention

[0003] Some embodiments of the present invention provide a baby stroller frame and a baby stroller, which are used to alleviate the problem of instability of the baby stroller frame after being folded.

[0004] Some embodiments of the present invention provide a baby carriage frame, comprising:

[0005] The frame body includes a folded state and an unfolded state, and the frame body includes a front leg tube assembly;

[0006] A front wheel assembly, arranged on the front leg tube assembly;

[0007] A locking mechanism is provided on the frame body, wherein the locking mechanism includes a locked state and an unlocked state; and

[0008] A linkage mechanism, provided on the frame body and connected to the front wheel assembly, wherein the linkage mechanism includes a positioning state and a non-positioning state;

[0009] Wherein, the frame body is configured to maintain the unfolded state when the locking mechanism is in the locked state, and the frame body is configured to switch from the unfolded state to the folded state when the locking mechanism is in the unlocked state;

[0010] The linkage mechanism is configured to be in a positioning state when the frame body is in the folded state, and to be in a positioning state to position the front wheel assembly.

[0011] In some embodiments, the linkage mechanism includes a positioning block provided on the front leg tube assembly and a positioning slot provided on the front wheel assembly. When the linkage mechanism is in a non-positioning state, the positioning block is located outside the positioning slot. During the process of the linkage mechanism converting from the non-positioning state to the positioning state, the positioning block moves into the positioning slot. When the linkage mechanism is in a positioning state, part of the positioning block is located inside the positioning slot, and part of the positioning block is located outside the positioning slot.

[0012] In some embodiments, the front wheel assembly includes a mounting frame and a wheel, the mounting frame is rotatably disposed on the front leg tube assembly, the wheel is disposed on the mounting frame, the positioning groove is disposed on the mounting frame, and when the linkage mechanism is in a positioning state, the mounting frame is fixed relative to the front leg tube assembly.

[0013] In some embodiments, the linkage mechanism also includes a pull rope, a first end of the pull rope is connected to the positioning block, and a second end of the pull rope is connected to the frame body. The pull rope is configured to lift the positioning block when the frame body is in the unfolded state so that the positioning block remains outside the positioning groove. The pull rope is also configured to relax during the process of the frame body converting from the unfolded state to the folded state so as to reduce the lifting force on the positioning block.

[0014] In some embodiments, the linkage mechanism also includes an elastic member, which is arranged on the front leg tube assembly, one end of the elastic member abuts against the positioning block, and the other end of the elastic member abuts against the front leg tube assembly, and the elastic member is configured to provide elastic force to push the positioning block to move into the positioning groove when the pull rope is relaxed.

[0015] In some embodiments, the front leg tube assembly includes a front leg tube and a guide block, the guide block is arranged at the lower end of the front leg tube, and a portion of the guide block is arranged in the front leg tube, the guide block is provided with a groove, the elastic member is arranged in the groove, and respectively abuts against the wall surface of the groove and the positioning block, the positioning block is configured to move along the groove, when the linkage mechanism is in a positioning state, a portion of the positioning block is located in the positioning groove, and a portion of the positioning block is located in the groove, and when the linkage mechanism is in a non-positioning state, the positioning block is located in the groove.

[0016] In some embodiments, the guide block is provided with a through hole, the through hole is communicated with the groove, and the pull rope passes through the through hole to connect with the positioning block.

[0017] In some embodiments, the frame body also includes a rear leg tube assembly, the linkage mechanism also includes a guide wheel, the guide wheel is arranged on the front leg tube, the pull rope is arranged inside the front leg tube and connected to the positioning block, and part of the pull rope is arranged outside the front leg tube and connected to the rear leg tube assembly through the guide wheel.

[0018] In some embodiments, the guide wheel is rotatably disposed on the front leg tube, and the guide wheel is configured to rotate under the tension of the pull rope.

[0019] In some embodiments, the pull rope includes a first rope segment and a second rope segment, the first end of the first rope segment is connected to the positioning block, the second end of the first rope segment is connected to the first position of the guide wheel, the first end of the second rope segment is connected to the second position of the guide wheel, and the second end of the second rope segment is connected to the rear leg tube assembly, and the guide wheel is configured to rotate under the tension of the second rope segment so that the first rope segment lifts the positioning block.

[0020] In some embodiments, the frame body further includes a rear leg tube assembly, and during the process of the frame body converting from the folded state to the unfolded state, the rear leg tube assembly and the front leg tube assembly move away from each other, and during the process of the frame body converting from the unfolded state to the folded state, the rear leg tube assembly and the front leg tube assembly move closer and close together.

[0021] In some embodiments,

[0022] The linkage mechanism further includes a drawstring, a first end of which is connected to the positioning block, and a second end of which is connected to the rear leg tube assembly;

[0023] The pull rope is configured to pull the positioning block when the locking mechanism is in a locked state and the frame body is in an unfolded state, so that the positioning block is kept outside the positioning groove and the linkage mechanism is in a non-positioning state;

[0024] The pull rope is also configured to be in an unlocked state when the locking mechanism is in an unlocked state. During the process of the frame body being transformed from the unfolded state to the folded state, the pull rope is relaxed to reduce the pulling force on the positioning block. Part of the positioning block is located in the positioning groove, and the linkage mechanism is in a positioning state.

[0025] Some embodiments of the present invention provide a baby stroller comprising the above-mentioned baby stroller frame.

[0026] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0027] In some embodiments, during the process of the frame body converting from the unfolded state to the folded state, the linkage mechanism is activated and converted from the non-positioned state to the positioned state, and when the frame body is in the folded state, the linkage mechanism is in the positioned state, positioning the front wheel assembly to prevent the front wheel assembly from shaking, thereby improving the stability of the frame body after folding, and the front wheel assembly can be synchronously positioned during the folding process of the frame body. After the frame body is folded, the front wheel assembly is positioned, and there is no need to position the front wheel assembly separately, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A schematic side view of a baby stroller frame in an unfolded state according to some embodiments of the present invention;

[0030] Figure 2 for Figure 1 An enlarged schematic diagram of a local structure A;

[0031] Figure 3 A schematic side view of a baby stroller frame in a folded state according to some embodiments of the present invention;

[0032] Figure 4 for Figure 3 An enlarged schematic diagram of the local structure B.

[0033] The reference numerals in the accompanying drawings are described as follows:

[0034] 1-frame body; 11-front leg tube assembly; 111-front leg tube; 112-guide block; 113-groove; 114-through hole; 12-rear leg tube assembly;

[0035] 2-front wheel assembly; 21-mounting frame; 22-wheel;

[0036] 3-Locking mechanism;

[0037] 4- linkage mechanism; 41- positioning block; 42- positioning groove; 43- pull rope; 431- first rope segment; 432- second rope segment; 44- elastic member; 45- guide wheel. DETAILED DESCRIPTION

[0038] The technical scheme in the embodiment will be described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0040] like Figure 1 As shown, some embodiments provide a baby stroller frame, which includes a frame body 1, a front wheel assembly 2, a locking mechanism 3 and a linkage mechanism 4.

[0041] The frame body 1 includes a folding state and an unfolding state, and the frame body 1 includes a front leg tube assembly 11. The front wheel assembly 2 is arranged on the front leg tube assembly 11. The locking mechanism 3 is arranged on the frame body 1, and the locking mechanism 3 includes a locked state and an unlocked state. The linkage mechanism 4 is arranged on the frame body 1 and connected to the front wheel assembly 2, and the linkage mechanism 4 includes a positioning state and a non-positioning state.

[0042] The frame body 1 is configured to maintain the unfolded state when the locking mechanism 3 is in the locked state, and the frame body 1 is configured to be convertible from the unfolded state to the folded state when the locking mechanism 3 is in the unlocked state.

[0043] The linkage mechanism 4 is configured to be in a positioned state when the frame body 1 is in the folded state, and to be in a positioned state to position the front wheel assembly 2.

[0044] In some embodiments, during the process of the frame body 1 being transformed from the unfolded state to the folded state, that is, during the folding process of the frame body 1, the linkage mechanism 4 is actuated to transform from the non-positioned state to the positioned state, and when the frame body 1 is in the folded state, it is in the positioned state, positioning the front wheel assembly 2 to prevent the front wheel assembly 2 from shaking, thereby improving the stability of the frame body 1 after folding, and the front wheel assembly 2 can be synchronously positioned during the folding process of the frame body 1, and when the frame body 1 is completely folded, the front wheel assembly 2 is completely positioned, and there is no need to position the front wheel assembly 2 separately, which is easy to operate.

[0045] In some embodiments, Figure 2 As shown, the linkage mechanism 4 includes a positioning block 41 provided on the front leg tube assembly 11 and a positioning groove 42 provided on the front wheel assembly 2, and the dimension of the positioning block 41 in the depth direction of the positioning groove 42 is greater than the depth of the positioning groove 42. Figure 2 As shown, when the linkage mechanism 4 is in the non-positioning state, the positioning block 41 is located outside the positioning groove 42. During the transition of the linkage mechanism 4 from the non-positioning state to the positioning state, the positioning block 41 moves into the positioning groove 42; Figure 3 and Figure 4 As shown, when the linkage mechanism 4 is in a positioning state, part of the positioning block 41 is located in the positioning groove 42, and part of the positioning block 41 is located outside the positioning groove 42 and in the front leg tube assembly 11. The front wheel assembly 2 is positioned by the cooperation of the positioning block 41 and the positioning groove 42, which has a simple structure and is easy to operate.

[0046] In some embodiments, the front wheel assembly 2 includes a mounting frame 21 and a wheel 22, wherein the mounting frame 21 is rotatably disposed on the front leg tube assembly 11, the wheel 22 is disposed on the mounting frame 21, and a positioning groove 42 is disposed on the mounting frame 21. When the frame body 1 is in a folded state and the linkage mechanism 4 is in a positioned state, the position of the mounting frame 21 relative to the front leg tube assembly 11 is fixed, and the mounting frame 21 will not swing or rotate relative to the front leg tube assembly 11, and the wheel 22 itself can rotate to facilitate pushing the folded frame body 1, and the frame body 1 will not be unstable due to the swing or rotation of the mounting frame 21 relative to the front leg tube assembly 11. When the frame body 1 is in an unfolded state and the linkage mechanism 4 is in a non-positioned state, the mounting frame 21 can swing or rotate relative to the mounting frame 21, which is beneficial to the reversal of the frame body 1 when pushing the frame body 1.

[0047] In some embodiments, the linkage mechanism 4 further includes a pull rope 43, a first end of the pull rope 43 is connected to the positioning block 41, and a second end of the pull rope 43 is connected to the frame body 1. Figure 2 As shown, the pull rope 43 is configured to pull the positioning block 41 when the frame body 1 is in the unfolded state, so that the positioning block 41 is kept outside the positioning groove 42, as shown in FIG. Figure 4 As shown, the pull rope 43 is also configured to be loosened during the process of the frame body 1 being transformed from the unfolded state to the folded state, so as to reduce the pulling force on the positioning block 41 .

[0048] When the frame body 1 is in the unfolded state, the pull rope 43 is in a tensioned state, and the positioning block 41 is pulled up, so that the positioning block 41 remains outside the positioning groove 42, and the positioning effect on the front wheel assembly 2 is released. When the frame body 1 is converted from the unfolded state to the folded state, the pull rope 43 is relaxed, and the pulling force on the positioning block 41 is reduced. Finally, when the frame body 1 is in the folded state, the pull rope 43 has no pulling force on the positioning block 41, and the positioning block 41 can be in the positioning groove 42 under the action of external force, so that the mounting frame 21 of the front wheel assembly 2 is fixed relative to the front leg tube assembly 11, and the purpose of positioning the front wheel assembly 2 is achieved.

[0049] In some embodiments, the linkage mechanism 4 further includes an elastic member 44, which is disposed on the front leg tube assembly 11, one end of the elastic member 44 abuts against the positioning block 41, and the other end of the elastic member 44 abuts against the front leg tube assembly 11, and the elastic member 44 is configured to provide elastic force to push the positioning block 41 to move into the positioning groove 42 when the pull rope 43 is relaxed. The elastic member 44 provides a restoring force to push the positioning block 41 to move into the positioning groove 42, which is easy to operate and is conducive to realizing the linkage of the positioning of the front wheel assembly 2 during the folding process of the frame body 1.

[0050] Optionally, the elastic member 44 includes a spring.

[0051] In some embodiments, the front leg tube assembly 11 includes a front leg tube 111 and a guide block 112. The guide block 112 is disposed at the lower end of the front leg tube 111, that is, the end of the front leg tube 111 close to the ground, and part of the guide block 112 is disposed in the front leg tube 111. The guide block 112 is provided with a groove 113, and the elastic member 44 is disposed in the groove 113. One end of the elastic member 44 abuts against the wall of the groove 113, and the other end of the elastic member 44 abuts against the positioning block 41. The groove 113 is disposed at the portion of the guide block 112 located outside the front leg tube 111.

[0052] When the frame body 1 is transformed from the folded state to the unfolded state, the pull rope 43 pulls the positioning block 41, and when the positioning block 41 moves outward from the positioning groove 42, the elastic member 44 is compressed and moves into the groove 113. Figure 2 As shown, when the frame body 1 is in the unfolded state, the positioning block 41 is located outside the positioning groove 42, and the compression elastic member 44 is located in the groove 113. When the frame body 1 is converted from the unfolded state to the folded state, the pulling force of the pull rope 43 on the positioning block 44 is reduced, and the elastic member 44 provides a restoring force to push the positioning block 41 to move toward the positioning groove 42. Figure 4 As shown, when the frame body 1 is in the folded state, the pull rope 43 has no pulling force on the positioning block 44. Under the action of the restoring force of the elastic member 44, part of the positioning block 44 is located in the positioning groove 42 and part of it is located in the groove 113. The groove 113 guides the movement of the positioning block 44.

[0053] In some embodiments, the guide block 112 is provided with a through hole 114, the through hole 114 is communicated with the groove 113, and the pull rope 43 passes through the through hole 114 to connect to the positioning block 41. The through hole 114 also has a guiding function for the pull rope 43. Part of the through hole 114 is located outside the front leg tube 111, and part of the through hole 114 is located inside the front leg tube 111.

[0054] In some embodiments, the frame body 1 further includes a rear leg tube assembly 12. When the frame body 1 is transformed from the folded state to the unfolded state, the rear leg tube assembly 12 and the front leg tube assembly 11 are separated from each other to support the entire frame, and when the frame body 1 is transformed from the unfolded state to the folded state, the rear leg tube assembly 12 and the front leg tube assembly 11 are close to each other.

[0055] In some embodiments, a first end of the pull rope 43 is connected to the positioning block 41 , and a second end of the pull rope 43 is connected to the rear leg tube assembly 12 .

[0056] In some embodiments, the linkage mechanism 4 also includes a guide wheel 45, which is disposed on the front leg tube 111, the pull rope 43 is disposed inside the front leg tube 111 and connected to the positioning block 41, and part of the pull rope 43 is disposed outside the front leg tube 111 and connected to the rear leg tube assembly 12 through the guide wheel 45.

[0057] In some embodiments, the guide wheel 45 is rotatably disposed on the front leg tube assembly 11, and the guide wheel 45 is configured to rotate under the tension of the pull rope 43. The guide wheel 45 rotates to prevent the pull rope 43 from getting stuck.

[0058] In some embodiments, Figure 2 and Figure 4 As shown, the pull rope 43 includes a first rope segment 431 and a second rope segment 432, the first end of the first rope segment 431 is connected to the positioning block 41, the second end of the first rope segment 431 is connected to the first position of the guide wheel 45, the first end of the second rope segment 432 is connected to the second position of the guide wheel 45, the second end of the second rope segment 432 is connected to the rear leg tube assembly 12, and the guide wheel 45 is configured to rotate under the pulling force of the second rope segment 432 so that the first rope segment 431 pulls the positioning block 41.

[0059] The pull rope 43 is configured to be tightened when the locking mechanism 3 is in the locked state, the frame body 1 is in the unfolded state, and the rear leg tube assembly 12 and the front leg tube assembly 11 are separated from each other, so as to lift the positioning block 41 so that the positioning block 41 remains outside the positioning groove 42, and the linkage mechanism 4 is in the non-positioning state.

[0060] The pull rope 43 is also configured to be in the unlocked state when the locking mechanism 3 is in the unlocked state, and the frame body 1 is converted from the unfolded state to the folded state. During the process of the rear leg tube assembly 12 and the front leg tube assembly 11 being close to each other, the pull rope 43 is relaxed to reduce the pulling force on the positioning block 41. Part of the positioning block 41 is located in the positioning groove 42, and the linkage mechanism 4 is in the positioning state.

[0061] That is to say, when the rear leg tube assembly 12 and the front leg tube assembly 11 are folded together, the linkage mechanism 4 synchronously positions the front wheel assembly 2 to prevent the front wheel assembly 2 from shaking, thereby improving the stability of the frame body 1 after folding; when the rear leg tube assembly 12 and the front leg tube assembly 11 are separated from each other, the linkage mechanism 4 synchronously releases the positioning of the front wheel assembly 2, which will not affect the movement flexibility of the frame body 1 after unfolding.

[0062] Some embodiments provide a baby stroller, which includes the baby stroller frame in the above embodiments. When the locking mechanism 3 of the baby stroller frame is unlocked, the linkage mechanism 4 is activated during the transition of the frame body 1 from the unfolded state to the folded state, and the linkage mechanism 4 is activated to convert from the non-positioned state to the positioned state. When the frame body 1 is in the folded state, the linkage mechanism 4 is in the positioned state, and the front wheel assembly 2 is positioned. The front wheel assembly 2 will not freely change direction relative to the frame body 1, thereby improving the stability of the baby stroller after folding. When the frame body 1 is in the unfolded state, the linkage mechanism 4 is activated to convert from the positioned state to the non-positioned state. When the frame body 1 is in the unfolded state, the locking mechanism 3 locks the frame body 1, and the linkage mechanism 4 is in the non-positioned state, and the positioning of the front wheel assembly 2 is released. The front wheel assembly 2 can freely change direction relative to the frame body 1, thereby improving the flexibility of the baby stroller during use.

[0063] In the description of the present invention, it should be understood that the use of terms such as "first", "second", and "third" to limit components is only for the convenience of distinguishing the above components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0064] In addition, unless explicitly denied, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A baby stroller frame, characterized in that: include: A frame body (1) includes a folded state and an unfolded state, and the frame body (1) includes a front leg tube assembly (11); A front wheel assembly (2) is arranged on the front leg tube assembly (11); A locking mechanism (3) is provided on the frame body (1), wherein the locking mechanism (3) includes a locked state and an unlocked state; and A linkage mechanism (4) is provided on the frame body (1) and connected to the front wheel assembly (2), wherein the linkage mechanism (4) includes a positioning state and a non-positioning state; The frame body (1) is configured to maintain the unfolded state when the locking mechanism (3) is in the locked state, and the frame body (1) is configured to switch from the unfolded state to the folded state when the locking mechanism (3) is in the unlocked state; The linkage mechanism (4) is configured to be in a state of being positioned when the frame body (1) is in a state of being unfolded and folded, and to be in a state of being positioned when the frame body (1) is in a state of being folded, and to be in a state of being positioned, so as to position the front wheel assembly (2); The linkage mechanism (4) comprises a positioning block (41) provided on the front leg tube assembly (11) and a positioning groove (42) provided on the front wheel assembly (2); the dimension of the positioning block (41) in the depth direction of the positioning groove (42) is greater than the depth of the positioning groove (42); when the linkage mechanism (4) is in a non-positioning state, the positioning block (41) is located outside the positioning groove (42); during the process of the linkage mechanism (4) switching from the non-positioning state to the positioning state, the positioning block (41) moves into the positioning groove (42); when the linkage mechanism (4) is in a positioning state, part of the positioning block (41) is located inside the positioning groove (42) and part of the positioning block (41) is located outside the positioning groove (42); The linkage mechanism (4) further comprises a pull rope (43), a first end of the pull rope (43) being connected to the positioning block (41), and a second end of the pull rope (43) being connected to the frame body (1), the pull rope (43) being configured to lift the positioning block (41) when the frame body (1) is in an unfolded state, so that the positioning block (41) is kept outside the positioning groove (42), and the pull rope (43) is also configured to relax during the process of the frame body (1) being converted from the unfolded state to the folded state, so as to reduce the pulling force on the positioning block (41); The linkage mechanism (4) further comprises an elastic member (44), wherein the elastic member (44) is arranged on the front leg tube assembly (11), one end of the elastic member (44) abuts against the positioning block (41), and the other end of the elastic member (44) abuts against the front leg tube assembly (11), and the elastic member (44) is configured to provide elastic force to push the positioning block (41) to move into the positioning groove (42) when the pull rope (43) is relaxed.

2. The baby carriage frame according to claim 1, characterized in that: The front wheel assembly (2) comprises a mounting frame (21) and a wheel (22); the mounting frame (21) is rotatably arranged on the front leg tube assembly (11); the wheel (22) is arranged on the mounting frame (21); the positioning groove (42) is arranged on the mounting frame (21); when the linkage mechanism (4) is in a positioning state, the mounting frame (21) is fixed relative to the front leg tube assembly (11).

3. The baby carriage frame according to claim 1, characterized in that: The front leg tube assembly (11) comprises a front leg tube (111) and a guide block (112); the guide block (112) is arranged at the lower end of the front leg tube (111), and part of the guide block (112) is arranged in the front leg tube (111); the guide block (112) is provided with a groove (113); the elastic member (44) is arranged in the groove (113) and abuts against the wall surface of the groove (113) and the positioning block (41) respectively; the positioning block (41) is configured to move along the groove (113); when the linkage mechanism (4) is in a positioned state, part of the positioning block (41) is located in the positioning groove (42) and part of the positioning block (41) is located in the groove (113); when the linkage mechanism (4) is in a non-positioned state, the positioning block (41) is located in the groove (113).

4. The baby carriage frame according to claim 3, characterized in that: The guide block (112) is provided with a through hole (114), the through hole (114) is communicated with the groove (113), and the pull rope (43) passes through the through hole (114) to connect with the positioning block (41).

5. The baby carriage frame according to claim 3, characterized in that: The frame body (1) also includes a rear leg tube assembly (12), and the linkage mechanism (4) also includes a guide wheel (45), wherein the guide wheel (45) is arranged on the front leg tube (111), a portion of the pull rope (43) is arranged inside the front leg tube (111) and connected to the positioning block (41), and a portion of the pull rope (43) is arranged outside the front leg tube (111) and connected to the rear leg tube assembly (12) via the guide wheel (45).

6. The baby carriage frame according to claim 5, characterized in that: The guide wheel (45) is rotatably disposed on the front leg tube (111), and the guide wheel (45) is configured to rotate under the pulling force of the pull rope (43).

7. The baby carriage frame according to claim 6, characterized in that: The pull rope (43) comprises a first rope segment (431) and a second rope segment (432), wherein the first end of the first rope segment (431) is connected to the positioning block (41), the second end of the first rope segment (431) is connected to the first position of the guide wheel (45), the first end of the second rope segment (432) is connected to the second position of the guide wheel (45), the second end of the second rope segment (432) is connected to the rear leg tube assembly (12), and the guide wheel (45) is configured to rotate under the pulling force of the second rope segment (432) so that the first rope segment (431) lifts the positioning block (41).

8. The baby carriage frame according to claim 1, wherein: The frame body (1) further comprises a rear leg tube assembly (12); when the frame body (1) is transformed from the folded state to the unfolded state, the rear leg tube assembly (12) and the front leg tube assembly (11) are separated from each other; when the frame body (1) is transformed from the unfolded state to the folded state, the rear leg tube assembly (12) and the front leg tube assembly (11) are moved closer and folded.

9. The baby carriage frame according to claim 8, characterized in that: The linkage mechanism (4) further comprises a pull rope (43), a first end of the pull rope (43) being connected to the positioning block (41), and a second end of the pull rope (43) being connected to the rear leg tube assembly (12); The pull rope (43) is configured to pull the positioning block (41) when the locking mechanism (3) is in a locked state and the frame body (1) is in an unfolded state, so that the positioning block (41) is kept outside the positioning groove (42) and the linkage mechanism (4) is in a non-positioning state; The pull rope (43) is also configured to be loosened when the locking mechanism (3) is in an unlocked state and the frame body (1) is converted from the unfolded state to the folded state, so as to reduce the pulling force on the positioning block (41), a part of the positioning block (41) is located in the positioning groove (42), and the linkage mechanism (4) is in a positioned state.

10. A baby stroller, characterized in that: The invention comprises a baby carriage frame according to any one of claims 1 to 9.

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