Stroller frame and child stroller

Abstract

The invention discloses a stroller frame and a child stroller. The stroller frame comprises a front support, a rear support, a push rod assembly and a linkage mechanism. Two of the front bracket, the rear bracket and the push rod assembly are rotationally connected, and the other one is rotationally connected with at least one of the two; the linkage mechanism is connected to the front support, the rear support and the push rod assembly. The joint position of the linkage mechanism and the push rod assembly is relatively located at the end, close to the front support, of the push rod assembly. When the push rod assembly is folded towards the rear support, the push rod assembly drives the front support to move in the direction of firstly getting away from the rear support and then getting close to the rear support through the linkage mechanism, so that the front support and the push rod assembly are synchronously folded to the rear support. According to the technical scheme, the folding and closing synchronism of the front support and the push rod assembly of the stroller frame can be improved, so that the folding compactness and stability of the stroller frame are improved, and the use experience of a user on the stroller is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a stroller frame and a child stroller using the stroller frame. Background Art

[0002] In the related art, in order to improve the convenience of carrying a child stroller, more and more child strollers have a foldable stroller frame. However, when the stroller frame is folded and stored, the front bracket and the push rod assembly of the stroller frame are folded one after another, which makes the stroller frame prone to uneven force, resulting in the compact effect of the stroller frame being affected and abnormal noise being easily generated, thereby affecting the user's experience of using the child stroller. Summary of the invention

[0003] The main purpose of the present invention is to provide a stroller frame, which aims to improve the synchronization of folding and closing of the front bracket and the push rod assembly of the stroller frame, so as to improve the compactness and stability of the stroller frame when folded, thereby enhancing the user's experience of using the stroller.

[0004] To achieve the above-mentioned purpose, the cart frame proposed by the present invention includes a front bracket, a rear bracket, a push rod assembly and a linkage mechanism;

[0005] Two of the front bracket, the rear bracket and the push rod assembly are rotatably connected, and the other one is rotatably connected to at least one of the two;

[0006] The linkage mechanism is connected to the front bracket, the rear bracket and the push rod assembly, and the engaging position of the linkage mechanism and the push rod assembly is relatively located at one end of the push rod assembly close to the front bracket;

[0007] When the push rod assembly is folded toward the rear bracket, the push rod assembly drives the front bracket to move in a direction away from the rear bracket and then toward the rear bracket through the linkage mechanism, so that the front bracket and the push rod assembly are synchronously folded toward the rear bracket.

[0008] Optionally, the linkage mechanism includes a first connecting member and a second connecting member, the first connecting member is rotatably connected to the front bracket, and the second connecting member is rotatably connected to the first connecting member and the rear bracket; in the unfolded state, a line connecting the rotation axis of the first connecting member and the front bracket and the rotation axis of the second connecting member and the rear bracket is defined as a first axis connecting line;

[0009] The rotation axes of the first connecting member and the second connecting member are located at the lower side of the first axis connecting line; when driven by the push rod assembly, the engaging position of the first connecting member and the second connecting member moves upward and drives the first connecting member and the second connecting member to move together and fold upward;

[0010] or,

[0011] The rotation axes of the first connecting member and the second connecting member are located on the upper side of the first axis line; when driven by the push rod assembly, the engagement position of the first connecting member and the second connecting member moves downward and drives the first connecting member and the second connecting member to move together and fold downward.

[0012] Optionally, in the unfolded state, the joint position of the first connecting member and the second connecting member is arranged close to the rear bracket;

[0013] And / or, the combination position of the second connecting member and the rear bracket is relatively located at an end of the rear bracket close to the front bracket;

[0014] And / or, the combination position of the first connecting member and the front bracket is relatively located in the middle position of the front bracket;

[0015] And / or, when the rotation axis of the first connecting member and the second connecting member is located on the lower side of the first axis line, the first connecting member is an arc-shaped structure, and in the expanded state, the concave arc surface of the first connecting member is set downward; the second connecting member is an arc-shaped structure at one end close to the first connecting member, and in the expanded state, the concave arc surface of the second connecting member is set upward in the expanded state, the concave arc surface of the first connecting member is tangent to the concave arc surface of the second connecting member, and the convex arc surface of the first connecting member is tangent to the convex arc surface of the second connecting member.

[0016] Optionally, in the unfolded state, one end of the second connecting member away from the first connecting member extends to between the rear bracket and the push rod assembly;

[0017] The linkage mechanism also includes a third connecting member, one end of the third connecting member is rotatably connected to an end of the second connecting member away from the first connecting member, and the other end of the third connecting member is rotatably connected to the push rod assembly. The engaging position of the third connecting member and the push rod assembly is relatively located at a position of the push rod assembly close to the front bracket.

[0018] Optionally, the distance between the rotation axis of the first connector and the second connector and the rotation axis of the second connector and the rear bracket is defined as L5, and the distance between the rotation axis of the second connector and the rear bracket and the rotation axis of the second connector and the third connector is defined as L6, and L6 is greater than L5; wherein L5 and L6 satisfy the following condition: 0.6≤L5 / L6≤0.8;

[0019] And / or, in the unfolded state, the cart frame is defined to have an up and down direction, the opening of the angle formed by the front bracket and the rear bracket is set downward, the position of the rotation axis of the second connecting member and the third connecting member is higher than the position of the rotation axis of the second connecting member and the rear bracket; the opening of the angle formed by the second connecting member and the third connecting member is opposite to the opening of the angle formed by the push rod assembly and the rear bracket; in the unfolded state, the opening of the angle formed by the third connecting member and the second connecting member is set forward as a whole; when the push rod assembly is moved toward the rear bracket and folded, the engaging position of the third connecting member and the second connecting member moves backward as a whole; the engaging position of the first connecting member and the second connecting member moves upward as a whole.

[0020] Optionally, the cart frame further comprises a seat frame, wherein the seat frame is rotatably connected to at least one of the front bracket, the rear bracket and the push rod assembly;

[0021] The linkage mechanism also includes a fourth connecting member, which is rotatably connected to the second connecting member and is close to one end rotatably connected to the first connecting member and the seat frame, so that when the first connecting member and the second connecting member are folded together, the seat frame can be driven by the fourth connecting member to fold close to the front bracket.

[0022] Optionally, the cart frame further comprises a backrest member, and the backrest member is rotatably connected to the seat frame and / or the fourth connecting member;

[0023] The end of the fourth connecting member that is away from the second connecting member is rotatably connected to the end of the seat frame close to the backrest member, so that when the first connecting member and the second connecting member are folded and brought together, the end of the seat frame close to the backrest member can be driven by the fourth connecting member to rotate upward, and the end of the backrest member away from the seat frame can be rotated downward under the action of the backrest member's own gravity;

[0024] The backrest member is rotatably connected to the fourth connecting member, and the rotation axis of the seat frame and the fourth connecting member is spaced from the rotation axis of the fourth connecting member and the backrest member.

[0025] Optionally, the push rod assembly comprises a lower push rod and an upper push rod, one end of the lower push rod is rotatably connected to the front bracket and / or the rear bracket, and the other end is rotatably connected to the upper push rod;

[0026] The linkage mechanism is connected to the lower push rod, and the push rod assembly can drive the front bracket to move through the linkage mechanism under the action of gravity in the folded state.

[0027] Optionally, one end of the rear bracket away from the front bracket and / or the lower push rod is connected to a rotatable rear moving wheel; a rotating joint is formed at the rotating connection between the lower push rod and the upper push rod, and the rotating joint forms an abutment plane; in the folded state, the cart frame is supported on the support surface through the rear moving wheel and the abutment plane;

[0028] And / or, define the angle formed by the front bracket and the rear bracket as α, and the angle formed by the push rod assembly and the rear bracket as p, satisfying the relationship: 0.7≤α / p≤1.1.

[0029] The present invention also provides a child stroller, comprising the stroller frame as described above.

[0030] When the stroller frame of the technical solution of the present invention is folded, in the process of the push rod assembly folding and approaching the rear bracket, the push rod assembly can drive the front bracket to move away from the rear bracket first and then fold and approach the rear bracket through the linkage mechanism. At this time, the time required for the front bracket to complete the folding and approaching the rear bracket is extended, and the angle between the front bracket and the rear bracket can be reduced because it is smaller than the angle between the rear bracket and the push rod assembly, resulting in the possibility that the front bracket completes the folding and approaching the rear bracket before the push rod assembly. That is, because of the setting of the linkage mechanism, the stroller frame in this solution can improve the synchronization of the folding and approaching of the front bracket of the stroller frame and the push rod assembly on the rear bracket, so that the rear bracket can be evenly stressed when the stroller frame is folded, which facilitates the folding of the stroller frame to be closer and quieter, thereby improving the compactness and stability of the folding of the stroller frame and enhancing the user's experience of the child stroller. Moreover, the engagement position of the linkage mechanism and the push rod assembly of the stroller frame in the present solution is still located at one end of the push rod assembly close to the front bracket, so that the push rod assembly can more fully exert its own weight on the linkage mechanism during the folding and closing process, so as to improve the driving effect of the linkage mechanism. At the same time, the volume of the linkage mechanism can be set relatively small, and the linkage mechanism, the front bracket, the rear bracket and the push rod assembly can be distributed more compactly to reduce the overall volume of the stroller frame, which is conducive to further improving the compact effect of the stroller frame after folding, so as to further enhance the user's experience of using the child stroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1It is a structural schematic diagram of an embodiment of a stroller frame of the present invention in an unfolded state;

[0033] Figure 2 for Figure 1 Schematic diagram of the mid-trolley frame from another perspective;

[0034] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0035] Figure 4 for Figure 2 A local enlarged schematic diagram of the middle A;

[0036] Figure 5 for Figure 2 A local enlarged schematic diagram of the middle A;

[0037] Figure 6 for Figure 1 A schematic diagram of a folding process of a mid-trolley frame;

[0038] Figure 7 for Figure 6 Another schematic diagram of the folding process of the mid-trolley frame;

[0039] Figure 8 for Figure 7 A schematic diagram of the structure of the mid-trolley frame in a folded state.

[0040] Description of Figure Numbers:

[0041] Label name Label name 100 Cart frame 51 First connecting piece 10 Front bracket 51a First axis connection 11 Front moving wheel 51b Second axis connection 20 Rear bracket 51c The third axis connection 21 Rear moving wheel 52 Second connecting piece 30 Push rod assembly 53 The third connecting piece 31 Push rod 54 Fourth connecting piece 311 Rotary joints 60 Mount 311a Abutment plane 70 Backrest 33 Push rod 90 Connection frame 50 Linkage mechanism

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] A child stroller, also called a baby stroller, is mainly used for children to ride. With the gradual development of child strollers, in order to facilitate users to carry and use the child strollers, more and more child strollers are set to a foldable structure. Among them, the child stroller mainly includes a stroller frame as a main structure and a cloth cover provided on the stroller frame. Therefore, in order to realize the foldable storage of the child stroller, the stroller frame is mainly set to a foldable structure.

[0048] At present, most folding stroller frames mainly include a front bracket, a rear bracket and a push rod assembly, which are rotatably connected to achieve the rotatable folding of the stroller frame. Moreover, when the stroller frame is actually designed, based on factors such as the convenience of user holding and children riding, the angle between the push rod assembly and the rear bracket is usually set to be relatively large, while the angle between the front bracket and the rear bracket is relatively small. In this way, when the stroller frame is folded and stored, the front bracket will be folded before the push rod assembly. That is, the front bracket and the push rod assembly are folded one after another. At this time, the folding is completed one after another, which will cause the stroller frame to be unevenly stressed, which will affect the compact effect of the folding of the stroller frame on the one hand, and on the other hand, it will also make it easy to produce abnormal noise during the folding process of the stroller frame, thereby affecting the user's experience of using the child stroller.

[0049] Therefore, based on the above considerations, in order to solve the problem that the folding of the push rod assembly has a large hysteresis when the front bracket and the push rod assembly in the cart frame are folded together, the present application proposes a new type of cart frame. The cart frame is innovatively provided with a linkage mechanism connected with the front bracket, the rear bracket and the push rod assembly, so that when the push rod assembly is folded and brought close to the rear bracket, the push rod assembly can drive the front bracket to move away from the rear bracket first through the linkage mechanism, and then fold and bring close to the rear bracket, thereby reducing the hysteresis of the push rod assembly when rotating and folding, and improving the synchronization of the front bracket and the push rod assembly during the folding process, so as to reduce the size of the folded cart frame in the front and rear directions, and at the same time improve the stability of the folding process to reduce the occurrence of abnormal noise. Moreover, the combination position of the linkage mechanism and the push rod assembly is still located at one end of the push rod assembly close to the front bracket, so that the push rod assembly can more fully apply its own gravity to the linkage mechanism during the folding process to effectively drive the linkage mechanism to move. At the same time, the volume of the linkage mechanism can be reduced, and the linkage mechanism, the front bracket, the rear bracket and the push rod assembly can be distributed more compactly to reduce the overall volume of the stroller frame. In this way, by reducing the overall volume of the stroller frame, the size of the stroller frame after folding, and improving the stability of the stroller frame folding process, the compactness and stability of the stroller frame folding can be greatly improved, thereby greatly improving the user experience of the child stroller.

[0050] Next, the structure of the cart frame proposed in this application is explained and illustrated by an embodiment. In one embodiment of this application, please refer to Figure 1 and Figure 2 ,as well as Figures 6 to 8 The cart frame 100 proposed in the present application includes a front bracket 10, a rear bracket 20, a push rod assembly 30 and a linkage mechanism 50; two of the front bracket 10, the rear bracket 20 and the push rod assembly 30 are rotatably connected, and the other is rotatably connected to at least one of the two; the linkage mechanism 50 is connected to the front bracket 10, the rear bracket 20 and the push rod assembly 30, and the engagement position of the linkage mechanism 50 and the push rod assembly 30 (wherein the engagement position is also the rotational connection position of the two, or the position of the rotation axis of the two) is relative to the end of the push rod assembly 30 close to the front bracket 10; when the push rod assembly 30 is folded toward the rear bracket, the push rod assembly 30 drives the front bracket 10 to move in a direction of first moving away from the rear bracket 20 and then approaching the rear bracket 20 through the linkage mechanism 50, so that the front bracket 10 and the push rod assembly 30 are synchronously brought together and folded to the rear bracket 20.

[0051] The front bracket 10 may be connected to a rotatable front moving wheel 11 at one end, and the other end is used for rotatably connecting to at least one of the rear bracket 20 and the push rod assembly 30. The front bracket 10 may be a linear rod structure as a whole, or an arc-shaped rod structure as a whole, or a combination of a linear rod and an arc-shaped rod. In addition, the cross-section of the front bracket 10 may be circular, or elliptical, square, or rectangular. It can be seen that the present application does not limit the structural type and shape of the front bracket 10. In addition, in the use state of the stroller, that is, the state when the stroller is in the unfolded state and is normally placed on the ground, the front bracket 10 may be inclined, or vertically. It can be seen that the present application does not limit the setting posture of the front bracket 10.

[0052] The rear bracket 20 may be connected to a rotatable rear moving wheel 21 at one end, and the other end is used to be rotatably connected to at least one of the front bracket 10 and the push rod assembly 30. Among them, the rear bracket 20 can be a linear rod structure as a whole, of course, it can also be an arc-shaped rod structure as a whole, or a combination of a linear rod and an arc-shaped rod. In addition, the cross-section of the rear bracket 20 can be circular, of course, it can also be elliptical, square or rectangular, etc. It can be seen that the present application does not limit the structural type and shape of the rear bracket 20. In addition, in the unfolded state, the rear bracket 20 can be set in an inclined manner, of course, it can also be set in a vertical manner. It can be seen that the present application does not limit the setting posture of the rear bracket 20. However, it should be noted that the rear bracket 20 and the front bracket 10 need to enclose and form an angle with the opening facing downward, so that the child stroller can be placed on the ground more stably for use.

[0053] The push rod assembly 30 can be used to provide a gripping position to facilitate the user's gripping and use. The push rod assembly 30 may include a lower push rod 31 and an upper push rod 33. One end of the lower push rod 31 can be rotatably connected to at least one of the front bracket 10 and the rear bracket 20, and the other end is rotatably connected to one end of the upper push rod 33. The linkage mechanism 50 is connected to the lower push rod 31, and the engagement position of the linkage mechanism 50 and the lower push rod 31 is relative to the end of the lower push rod 31 close to the front bracket 10. At this time, the lower push rod 31 can be used to lift the height position of the upper push rod 33, so that when the length of the upper push rod 33 is set relatively short, it can still be convenient for the user to grip and use; at the same time, the lower push rod 31 and the upper push rod 33 can be folded between them to reduce the size of the cart frame 100 in the vertical direction after folding. On the other hand, when the lower push rod 31 and the upper push rod 33 are folded and close to the rear bracket 20, the folded lower push rod 31 and the upper push rod 33 can also drive the front bracket 10 through the linkage mechanism 50. Among them, the lower push rod 31 can be a linear rod structure as a whole, of course, it can also be an arc rod structure as a whole, or a combination of a linear rod and an arc rod. The cross section of the lower push rod 31 can be circular, of course, it can also be elliptical, square or rectangular. It can be seen that the present application does not limit the structural type and shape of the lower push rod 31. In addition, when in the unfolded state, the angle formed by the lower push rod 31 and the rear bracket 20 can be an acute angle, a right angle or an obtuse angle, and the present application does not limit the size of the angle formed by the lower push rod 31 and the rear bracket 20. Similarly, the upper push rod 33 can be a linear rod structure as a whole, of course, it can also be an arc rod structure as a whole, or a combination of a linear rod and an arc rod. The cross section of the upper push rod 33 can be circular, and of course it can also be elliptical, square or rectangular. It can be seen that the present application does not limit the structural type and shape of the upper push rod 33. In addition, when in the unfolded state, the upper push rod 33 and the lower push rod 31 can be arranged at an angle, and of course they can also be arranged in parallel. Among them, when the upper push rod 33 and the lower push rod 31 are arranged in parallel, it can include the situation that the center lines of the upper push rod 33 and the lower push rod 31 coincide, and it can also include the situation that the center lines of the upper push rod 33 and the lower push rod 31 are parallel and spaced. In addition, it should be noted that the rotational connection between the front bracket 10, the rear bracket 20 and the lower push rod 31, and the rotational connection between the upper push rod 33 and the lower push rod 31 can be achieved by a hinge, and of course it can also be achieved by penetrating a connecting shaft. The present application does not limit the connection mode of the rotational connection between the front bracket 10, the rear bracket 20 and the lower push rod 31, and the rotational connection between the upper push rod 33 and the lower push rod 31.In addition, it should be noted that the limit locking of the front bracket 10, the rear bracket 20, the lower push rod 31 and the upper push rod 33 in the unfolded state can be a limit locking method in which the limit post is driven by the elastic member to be inserted into the corresponding limit hole after being rotated and unfolded to the full extent; of course, it can also be a limit locking method in which two magnetic members are magnetically attracted after being rotated and unfolded to the full extent. It can be seen that the present application does not limit the limit locking method of the cart frame 100 in the unfolded state.

[0054] The linkage mechanism 50 can drive the front bracket 10 to rotate when the upper push rod 33 and the lower push rod 31 are folded together to approach the rear bracket 20. The linkage mechanism 50 can drive the front bracket 10 to rotate in a direction away from the rear bracket 20 first, and then rotate in a direction close to the rear bracket 20, so that when the front bracket 10 is folded close to the rear bracket 20, it can be synchronized with the push rod assembly 30 folding close to the rear bracket 20. The linkage mechanism 50 can include a first connecting member 51 and a second connecting member 52 as described below. Of course, the linkage mechanism 50 can also include an angle sensor, a controller and a motor. At this time, the angle sensor can detect the rotation angle of the upper push rod 33 and the lower push rod 31 when they are folded close to the rear bracket 20, and transmit it to the controller. The controller can control the motor to drive the front bracket 10 to first move away from the rear bracket 20 and then fold close to the rear bracket 20 according to the rotation of the lower push rod 31. It can be seen that the specific structure of the linkage mechanism 50 is not limited in this application. In addition, it should be noted that the upper push rod 33 and the lower push rod 31 can be driven by the combination's own gravity when folding and closing to the rear bracket 20, or can be driven manually by the user.

[0055] In addition, in order to improve the stability of the overall structure of the cart frame 100, the front bracket 10, the rear bracket 20, the lower push rod 31, the upper push rod 33 and the linkage mechanism 50 can constitute a set of side brackets, and the cart frame 100 can include two sets of side brackets arranged at intervals in the direction parallel to the rotation axis of the front bracket 10. Further, the cart frame 100 can also include a connecting frame 80, and the number of the connecting frame 80 can be one, so as to connect two front brackets 10, or connect two rear brackets 20, or connect two upper push rods 33. Alternatively, the number of the connecting frame 80 can also be at least two, so as to connect at least two of the two front brackets 10, the two rear brackets 20 or the two upper push rods 33.

[0056] When the cart frame 100 of the technical solution of the present application is folded, the upper push rod 33 can be folded close to the lower push rod 31 first, and then when the upper push rod 33 and the lower push rod 31 are combined, that is, when the push rod assembly 30 is folded close to the rear bracket 20, the push rod assembly 30 can drive the front bracket 10 to move away from the rear bracket 20 first through the linkage mechanism 50, and then fold close to the rear bracket 20. At this time, the time required for the front bracket 10 to complete the folding close to the rear bracket 20 is extended, and the angle between the front bracket 10 and the rear bracket 20 can be reduced because it is smaller than the angle between the rear bracket 20 and the push rod assembly 30, resulting in the possibility that the front bracket 10 completes the folding close to the rear bracket 20 before the push rod assembly 30. That is, the stroller frame 100 in this solution can improve the synchronization of the folding and closing of the front bracket 10 of the stroller frame 100 and the push rod assembly 30 on the rear bracket 20 due to the setting of the linkage mechanism 50, so that the rear bracket 20 can be evenly stressed when the stroller frame 100 is folded, which is convenient for the stroller frame 100 to fold closer and quieter, thereby improving the compactness and stability of the folding of the stroller frame 100 and enhancing the user's experience of using the child stroller. Moreover, the engagement position of the linkage mechanism 50 and the push rod assembly 30 of the stroller frame 100 in this solution is still located at one end of the push rod assembly 30 close to the front bracket 10, so that the push rod assembly 30 can more fully exert its own weight on the linkage mechanism 50 during the folding and closing process, so as to improve the driving effect of the linkage mechanism 30. At the same time, the volume of the linkage mechanism 30 can be set relatively small, and the linkage mechanism 50 and the front bracket 10, the rear bracket 20 and the push rod assembly 30 can be distributed more compactly to reduce the overall volume of the stroller frame 100, which is beneficial to further improve the compactness of the stroller frame 100 after folding, so as to further enhance the user's experience of using the child stroller.

[0057] Please refer to Figure 1 and Figure 2 ,as well as Figure 6 and Figure 7 In one embodiment of the present application, the linkage mechanism 50 includes a first connecting member 51 and a second connecting member 52, the first connecting member 51 is rotatably connected to the front bracket 10, and the second connecting member 52 is rotatably connected to the first connecting member 51 and the rear bracket 20; when the lower push rod 31 is folded and the rear bracket 20 is close together, it can drive the first connecting member 51 and the second connecting member 52 to fold and close together, so as to drive the front bracket 10 to first move away from the rear bracket 20, and then fold and close to the rear bracket 20.

[0058] In this embodiment, the linkage mechanism 50 is set to a connecting rod structure including a first connecting member 51 and a second connecting member 52 that are rotatably connected to each other, so that the linkage mechanism 50 can be a mechanical physical structure, and will not involve circuits and gas circuits, etc., which is conducive to simplifying the structure of the linkage mechanism 50 to improve the convenience of setting the linkage mechanism 50. Moreover, the linkage mechanism 50 at this time can also be folded, so that when the linkage mechanism 50 is in a folded state, the linkage mechanism 50 will not cause excessive occupation of space, which is conducive to further improving the compactness of the cart frame 100 after folding. Among them, the first connecting member 51 and the second connecting member 52 can be a plate structure or a rod structure, and the present application does not limit the structural shape of the first connecting member 51 and the second connecting member 52.

[0059] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, in the unfolded state, the line connecting the rotation axis of the first connecting member 51 and the front bracket 10 and the rotation axis of the second connecting member 52 and the rear bracket 20 is defined as the first axis connecting line 51a; the rotation axis of the first connecting member 51 and the second connecting member 52 is located at the lower side of the first axis connecting line 51a; when driven by the push rod assembly 30, the engaging position of the first connecting member 51 and the second connecting member 52 moves upward and drives the first connecting member 51 and the second connecting member 52 to be folded upward;

[0060] In this embodiment, the engagement position of the first connecting member 51 and the second connecting member 52 is set to be driven by the push rod assembly 30 to rotate upward, and the rotation axis of the first connecting member 51 and the second connecting member 52 is located at the lower side of the first axis connection line 51a. In this way, when the push rod assembly 30 drives the engagement position of the first connecting member 51 and the second connecting member 52 to move upward, the rotation axis of the first connecting member 51 and the second connecting member 52 can first move to the first axis connection line 51a, and then move to the upper side of the first axis connection line 51a. In the process of the rotation axis of the first connecting member 51 and the second connecting member 52 moving to the first axis connection line 51a, the first connecting member 51 and the second connecting member 52 can be pulled apart. In the process of the rotation axis of the first connecting member 51 and the second connecting member 52 moving to the upper side of the first axis connection line 51a, the first connecting member 51 and the second connecting member 52 can be folded. At this time, the push rod assembly 30 drives the first connecting member 51 and the second connecting member 52 to be first pulled apart and then folded, thereby driving the front bracket 10 away from the rear bracket 20 first and then folding toward the rear bracket 20. Moreover, the positional relationship between the rotation axis of the first connecting member 51 and the second connecting member 52 and the first axis connecting line 51a is set in this way, so that the first connecting member 51 and the second connecting member 52 can be driven by the push rod assembly 30 to rotate in a single direction, thereby making the movement of the first connecting member 51 and the second connecting member 52 relatively simple, thereby simplifying the structure of the linkage mechanism 50 and the convenience of the push rod assembly 30 driving the linkage mechanism 50. At the same time, since the rotation axis of the first connecting member 51 and the second connecting member 52 is located below the first axis connecting line 51a, when the push rod assembly 30 rotates downward, the first connecting member 51 and the second connecting member 52 can be folded upward by driving the end of the second connecting member 52 away from the first connecting member 51 to rotate downward. That is, at this time, the push rod assembly 30 and the second connecting member 52 have the same rotation direction at one end away from the first connecting member 51, which is conducive to further improving the convenience of the push rod assembly 30 driving the linkage mechanism 50, so as to further simplify the connection between the linkage mechanism 50 and the push rod assembly 30. Of course, in other embodiments, it is also possible that the rotation axis of the first connecting member 51 and the second connecting member 52 is located on the upper side of the first axis line 51a. At this time, under the state driven by the push rod assembly 30, the engagement position of the first connecting member 51 and the second connecting member 52 moves downward and drives the first connecting member 51 and the second connecting member 52 to move together and fold downward.

[0061] Please refer to reference 2 and Figure 3 In one embodiment of the present application, the length of the first axis line 51a is defined as L1, and the distance between the rotation axis of the first connecting member 51 and the second connecting member 52 and the first axis line 51a is L2, satisfying the relationship: L2 / L1≤0.1.

[0062] In this embodiment, the ratio of L2 to L1 is set to be less than or equal to 0.1, so that the distance between the rotation axis of the first connecting member 51 and the second connecting member 52 and the first axis connecting line 51a will not be too large, so that the first connecting member 51 and the second connecting member 52 can extend the time for the front bracket 10 to fold close to the rear bracket 20 during the folding process, and will not affect the overall folding efficiency of the cart frame 100. At the same time, the first connecting member 51 and the second connecting member 52 can be distributed more compactly to reduce the volume of the linkage mechanism 50 and improve the compactness of subsequent folding. Therefore, by setting the ratio range of L2 to L1 in this way, it is possible to better take into account the synchronization of the folding and closing of the front bracket 10 and the combination of the upper push rod 33 and the lower push rod 31, the overall folding efficiency of the cart frame 100, and the compactness of the cart frame 100 after folding. Among them, the ratio of L2 and L1 can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, or 0.1. Of course, it can also be any value in the above range. This application does not limit the specific value of the ratio of L2 and L1.

[0063] In order to achieve the same better balance between the folding synchronization of the front bracket 10 and the upper push rod 33 and the lower push rod 31, the overall folding efficiency of the cart frame 100 and the compactness of the cart frame 100 after folding. Figure 4 In one embodiment of the present application, the line connecting the rotation axis of the first connecting member 51 and the front bracket 10 and the rotation axis of the first connecting member 51 and the second connecting member 52 is defined as the second axis line 51b, and the line connecting the rotation axis of the first connecting member 51 and the second connecting member 52 and the rotation axis of the second connecting member 52 and the rear bracket 20 is defined as the third axis line 51c; the angle formed by the front bracket 10 and the rear bracket 20 is α, and the angle formed by the second axis line 51b and the third axis line 51c is β, which satisfies the relationship: β / α≤2.5. Among them, the ratio of β to α can be 0.5, 1, 1.5, 2 or 2.5, and of course it can also be any value in the above range. The present application does not limit the specific value of the ratio of β to α.

[0064] Please refer to Figure 2 and Figure 3 In the unfolded state, the joint position of the first connecting member 51 and the second connecting member 52 is arranged close to the rear bracket 20 .

[0065] In this embodiment, the positions of the rotation axes of the first connecting member 51 and the second connecting member 52 are set relatively close to the rear bracket 20, so that when the push rod assembly 30 rotates downward, it is convenient to apply force to the second connecting member 52 to achieve the driving of the second connecting member 52. At this time, in other words, in the direction parallel to the first axis line 51a, the projected length between the rotation axis of the first connecting member 51 and the front bracket 10 and the rotation axis of the first connecting member 51 and the second connecting member 52 is defined as L3, and the projected length between the rotation axis of the first connecting member 51 and the second connecting member 52 and the rotation axis of the second connecting member 52 and the rear bracket 20 is L4, satisfying the relationship: L4<L3. Furthermore, in some embodiments, L4 and L3 can also satisfy the relationship: L4 / L3≤0.6, so as to further improve the driving effect of the push rod assembly 30 on the second connecting member 52. Among them, the ratio of L4 to L3 can be 0.1, 0.2, 0.3, 0.4, 0.5 or 0.6, and of course it can be any value in the above range. This application does not limit the specific value of the ratio of L4 to L3.

[0066] Please refer to reference 2 and Figure 3 In one embodiment of the present application, the position of the rotation axis of the first connecting member 51 and the front bracket 10 is lower than the position of the rotation axis of the second connecting member 52 and the rear bracket 20.

[0067] In this embodiment, the position of the rotation axis of the first connecting member 51 and the front bracket 10 is set lower than the position of the rotation axis of the second connecting member 52 and the rear bracket 20. On the one hand, the second connecting member 52 and the push rod assembly 30 can be closer to each other to facilitate the connection between the second connecting member 52 and the push rod assembly 30, and the volume of the second connecting member 52 can be reduced to improve the compactness of the subsequent folding of the cart frame 100. On the other hand, the first connecting member 51 and the rotation axes of the front bracket 10, the rear bracket 20 and the push rod assembly 30 have a certain distance, so as to facilitate the first connecting member 51 and the second connecting member 52 to drive the front bracket 10 when folding. Among them, the combination position of the second connecting member 52 and the rear bracket 20 (that is, the position of the rotation axis) is relatively located at one end of the rear bracket 20 close to the front bracket 10, and the combination position of the first connecting member 51 and the front bracket 10 (that is, the position of the rotation axis) is relatively located in the middle position of the front bracket 10. Of course, in other embodiments, the rotation axis of the first connecting member 51 and the front bracket 10 and the rotation axis of the second connecting member 52 and the rear bracket 20 may also be located at the same height, or the rotation axis of the first connecting member 51 and the front bracket 10 is higher than the rotation axis of the second connecting member 52 and the rear bracket 20.

[0068] Please refer to reference 2 and Figure 4In one embodiment of the present application, the angle formed by the front bracket 10 and the rear bracket 20 is defined as α, and the angle formed by the first axis line 51a and the horizontal direction is defined as γ, satisfying the relationship: γ / α≤0.1.

[0069] In this embodiment, the ratio of γ to α is set to be less than or equal to 0.1, so that the volume of the linkage mechanism 50 will not be too large, which is conducive to improving the compactness of the cart frame 100 after folding. At the same time, the second connecting member 52 and the rotation axes of the front bracket 10, the rear bracket 20 and the push rod assembly 30 will not be too close to each other, so as to reduce the possibility of interference between the second connecting member 52 and the structure at the rotation axis during the rotation process. Therefore, by setting the ratio range of γ to α in this way, the compactness of the cart frame 100 after folding and the safety during the folding process can be better considered. Among them, the value of the ratio of γ to α can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, and of course, it can also be any value in the above range. The specific value of the ratio of γ to α is not limited in this application.

[0070] Please refer to Figure 2 In one embodiment of the present application, the first connecting member 51 is an arc-shaped structure, and in the unfolded state, the concave arc surface of the first connecting member 51 is arranged downward.

[0071] In this embodiment, the first connecting member 51 is configured as an arc structure, so that it can meet the angle requirements required by the front bracket 10 and the rear bracket 20 when they are unfolded with a relatively small volume. At the same time, such a configuration also makes the shape of the first connecting member 51 more novel, which can improve the visual perception effect of the user and further enhance the user's experience.

[0072] In order to achieve the same effect, in one embodiment of the present application, the end of the second connecting member 52 close to the first connecting member 51 can also be set to an arc structure, and in the unfolded state, the concave arc surface of the second connecting member 52 is set upward. Moreover, in order to make the first connecting member 51 and the second connecting member 52 more adaptable and compact after folding, in one embodiment of the present application, in the unfolded state, the concave arc surface of the first connecting member 51 and the concave arc surface of the second connecting member 52 are tangent, and the convex arc surface of the first connecting member 51 and the convex arc surface of the second connecting member 52 are tangent.

[0073] Please refer to Figure 2 In one embodiment of the present application, one end of the second connecting member 52 away from the first connecting member 51 extends between the rear bracket 20 and the lower push rod 31 of the push rod assembly 30, and is rotatably connected to the lower push rod 31.

[0074] In this embodiment, the second connecting member 52 is extended from one end of the first connecting member 51 to the side of the rear bracket 20 away from the front bracket 10, so that the second connecting member 52 and the lower push rod 31 can be conveniently connected. Further, the second connecting member 52 and the lower push rod 31 are set to be rotationally connected, so that there is always a connection relationship between the two, and the stability of the lower push rod 31 driving the second connecting member 52 can be improved. Among them, the second connecting member 52 and the lower push rod 31 can be indirectly connected by rotation through the third connecting member 53 described below. Of course, in other embodiments, the second connecting member 52 and the lower push rod 31 can also be directly connected by rotation. In addition, in some embodiments, the lower push rod 31 can also be abutted against the second connecting member 52.

[0075] Please refer to Figure 1 and Figure 2 In one embodiment of the present application, the linkage mechanism 50 also includes a third connecting member 53, one end of the third connecting member 53 is rotatably connected to one end of the second connecting member 52 away from the first connecting member 51, and the other end of the third connecting member 53 is rotatably connected to the lower push rod 31 of the push rod assembly 30, and the engaging position of the third connecting member 53 and the lower push rod 31 is relatively located at a position of the push rod assembly 30 close to the front bracket 10.

[0076] In this embodiment, by providing the third connecting member 53, on the one hand, the length of the second connecting member 52 does not need to be set too long, so as to reduce the volume of the second connecting member 52. On the other hand, the lower push rod 31 of the push rod assembly 30 drives the third connecting member 53 to rotate a relatively large stroke through the fourth connecting member 54, so that the front bracket 10 and the rear bracket 20 can be closer after being folded. In this way, by reducing the volume of the second connecting member 52 and folding the front bracket 10 and the rear bracket 20 closer together, it is helpful to further improve the compactness of the cart frame 100 after folding. Among them, the third connecting member 53 can be a plate structure or a rod structure, and the present application does not limit the structural shape of the third connecting member 53.

[0077] Please refer to Figure 2 and Figure 5 In one embodiment of the present application, the distance between the rotation axis of the first connecting member 51 and the second connecting member 52 and the rotation axis of the second connecting member 52 and the rear bracket 20 is defined as L5, and the distance between the rotation axis of the second connecting member 52 and the rear bracket 20 and the rotation axis of the second connecting member 52 and the third connecting member 53 is defined as L6, L6 is greater than L5, and the relationship: 0.6≤L5 / L6≤0.8 can also be satisfied.

[0078] In this embodiment, the ratio of L5 to L6 is set to 0.6 to 0.8. On the one hand, the ratio is not too small, which results in a too small rotation radius of the end of the second connecting member 52 close to the first connecting member 51, thereby affecting the compactness of the folding between the front bracket 10 and the rear bracket 20. On the other hand, the ratio is not too large, which results in an increase in the resistance of the lower push rod 31 to the second connecting member 52. Therefore, by setting the ratio range of L5 to L6 in this way, the compactness and smoothness of the folding of the cart frame 100 can be well taken into account.

[0079] Please refer to Figure 2 In one embodiment of the present application, in the unfolded state, the cart frame 100 is defined to have an up-down direction, the opening of the angle formed by the front bracket 10 and the rear bracket 20 is set downward, and the position of the rotation axis of the second connecting member 52 and the third connecting member 53 is higher than the position of the rotation axis of the second connecting member 52 and the rear bracket 20.

[0080] In this embodiment, the rotation axis of the second connecting member 52 and the third connecting member 53 is set higher than the rotation axis of the second connecting member 52 and the rear bracket 20. On the one hand, the distance between the second connecting member 52 and the lower push rod 31 can be reduced, so that the length of the third connecting member 53 does not need to be set relatively long, which is conducive to reducing the size of the linkage mechanism 50. On the other hand, it is also convenient to meet the required rotation stroke of the second connecting member 52. Therefore, through the effects of these two aspects, it is conducive to further improving the compactness of the cart frame 100 after folding.

[0081] Please refer to Figure 2 In one embodiment of the present application, the opening of the angle formed by the second connecting member 52 and the third connecting member 53 is arranged opposite to the opening of the angle formed by the lower push rod 31 and the rear bracket 20.

[0082] In this embodiment, the second connecting member 52 and the third connecting member 53 are arranged at an angle, and the opening of the angle faces the opening of the angle formed by the lower push rod 31 and the rear bracket 20, so that the compactness of the distribution of the second connecting member 52 and the third connecting member 53 can be improved, so as to further reduce the volume of the linkage mechanism 50. On the other hand, it is also convenient for the third connecting member 53 to apply a force to the second connecting member 52, and the convenience of the lower push rod 31 driving the second connecting member 52 is improved. Specifically, in the unfolded state, the opening of the angle formed by the third connecting member 53 and the second connecting member 52 is arranged forward as a whole; when the push rod assembly 30 is folded toward the rear bracket 20, the joint position of the third connecting member 53 and the second connecting member 52 moves backward as a whole; the joint position of the first connecting member 51 and the second connecting member 52 moves upward as a whole.

[0083] Please refer to reference 2 and Figure 4In one embodiment of the present application, the angle formed by the lower push rod 31 and the rear bracket 20 is defined as p, and the angle formed by the second connecting member 52 and the third connecting member 53 is defined as m, satisfying the relationship: m / p≤1.5.

[0084] In this embodiment, the ratio of m to p is set to be less than or equal to 1.5, so that the volume of the linkage mechanism 50 will not be too large, which is conducive to improving the compactness of the cart frame 100 after folding. At the same time, it is also convenient for the third connecting member 53 to apply a force to the second connecting member 52 so as to drive the second connecting member 52 to rotate. Among them, the ratio of m to p can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14 or 0.15, and of course it can be any value in the above range. The specific value of the ratio of m to p is not limited in this application.

[0085] Please refer to Figure 1 and Figure 2 ,as well as Figures 6 to 8 In one embodiment of the present application, the cart frame 100 also includes a seat frame 60, which is rotatably connected to at least one of the front bracket 10, the rear bracket 20 and the lower push rod 31 in the push rod assembly 30; the linkage mechanism 50 also includes a fourth connecting member 54, which is rotatably connected to the second connecting member 52 close to one end rotatably connected to the first connecting member 51 and the seat frame 60, so that when the first connecting member 51 and the second connecting member 52 are in a folded and closed state, the seat frame 60 can be driven by the fourth connecting member 54 to fold close to the front bracket 10.

[0086] The seat frame 60 can be used for children to sit on. The seat frame 60 can be a U-shaped rod structure to improve the lightweight effect of the seat frame 60. Of course, the seat frame 60 can also be a plate structure, and the present application does not limit the structural shape of the seat frame 60.

[0087] In this embodiment, the provision of the fourth connecting member 54 can enhance the linkage function of the linkage mechanism 50, so that when the push rod assembly 30 drives the front bracket 10 to be folded through the linkage mechanism 50, it can also drive the seat frame 60 to be folded, thereby helping to further improve the compactness of the cart frame 100 after folding.

[0088] Please refer to Figure 1 and Figure 2 ,as well as Figures 6 to 8In one embodiment of the present application, the cart frame 100 also includes a backrest member 70, which is rotatably connected to the seat frame 60 and / or the fourth connecting member 54; the fourth connecting member 54 is rotatably connected to an end of the seat frame 60 close to the backrest member 70 away from the end rotatably connected to the second connecting member 52, so that when the first connecting member 51 and the second connecting member 52 are folded and closed, the end of the seat frame 60 close to the backrest member 70 can be driven by the fourth connecting member 54 to rotate upward, and the end of the backrest member 70 away from the seat frame 60 can be rotated downward under the action of the backrest member 70's own gravity.

[0089] The backrest member 70 can be used for children to lean on, so as to further improve the stability of children's riding. Among them, the backrest member 70 can be a U-shaped rod structure to improve the lightweight effect of the backrest member 70. Of course, the backrest member 70 can also be a plate structure, and the present application does not limit the structural shape of the backrest member 70. In addition, the backrest member 70 can be rotatably connected to the seat frame 60, or it can be rotatably connected to the fourth connecting member 54, or it can be connected to the seat frame 60 and the fourth connecting member 54. In addition, it should be noted that the end of the backrest member 70 away from the seat frame 60 can be connected to the lower push rod 31 and / or the upper push rod 33 through a cloth cover.

[0090] In this embodiment, the fourth connecting member 54 is further rotatably connected to the backrest member 70, so that when the fourth connecting member 54 drives the end of the seat frame 60 close to the backrest member 70 to rotate upward, the end of the backrest member 70 close to the seat frame 60 can be lifted accordingly. At this time, the backrest member 70 will not hit the ground during the folding process of the cart frame 100 because of the lifting effect of the seat frame 60 on it. In this way, the backrest member 70 can realize the folding of the cart frame 100 without making the backrest member 70, which is conducive to simplifying the structure of the cart frame 100. Among them, the interrupted design needs to be cut into at least two parts to cater to the folding of the cart frame 100.

[0091] In one embodiment of the present application, the backrest member 70 is rotatably connected to the fourth connecting member 54 , and the rotation axis of the seat frame 60 and the fourth connecting member 54 is spaced from the rotation axis of the fourth connecting member 54 and the backrest member 70 .

[0092] In this embodiment, the backrest member 70 and the seat frame 60 are rotatably connected to different positions of the fourth connecting member 54, which can facilitate the setting of the connection structure to improve the convenience of the rotation connection between the members. On the other hand, the extension of the fourth connecting member 54 can also be used as an extension of the seat frame 60, and the size of the backrest member 70 and the seat frame 60 can be reduced, thereby reducing the possibility of the backrest member 70 and the seat frame 60 being too protruding at the folded upper end, so as to further improve the compactness of the folding of the cart frame 100. Among them, the fourth connecting member 54 can be configured to include two segments arranged at an angle, one end of one segment can be rotatably connected to the second connecting member 52, and the two ends of the other segment can be rotatably connected to the backrest member 70 and the seat frame 60, respectively. In this way, the fourth connecting member 54 can be conveniently provided with a connection position, and the structure of the fourth connecting member 54 can be simplified and the volume of the fourth connecting member 54 can be reduced to improve the compactness of the cart frame 100.

[0093] In one embodiment of the present application, the push rod assembly 30 can drive the front bracket 10 to first move away from the rear bracket 20 through the linkage mechanism 50 under the action of gravity, and then fold and move closer to the rear bracket 20.

[0094] In this embodiment, the push rod assembly 30 is configured to drive the front bracket 10 to move under the action of gravity through the linkage mechanism 50, which can improve the convenience of using the stroller frame 100 and further enhance the user's experience. Among them, when the push rod assembly 30 includes the lower push rod 31 and the upper push rod 33 as described above, the front bracket 10 can be driven to move by the linkage mechanism 50 under the action of gravity by the folded lower push rod 31 and the upper push rod 33.

[0095] Please refer to Figure 1 , Figure 4 as well as Figure 6 In one embodiment of the present application, the angle formed by the front bracket 10 and the rear bracket 20 is defined as α, and the angle formed by the lower push rod 31 in the push rod assembly 30 and the rear bracket 20 is defined as p, satisfying the relationship: 0.7≤α / p≤1.1.

[0096] In this embodiment, the ratio of α to p is set to 0.7 to 1.1, which can better balance the stability of the baby stroller on the ground and the comfort of the user's holding posture. At the same time, in conjunction with the setting of the linkage mechanism 50, the synchronization of the combination of the lower push rod 31 and the upper push rod 33 and the folding of the front bracket 10 close to the rear bracket 20 can be further improved.

[0097] Please refer to Figure 2 In one embodiment of the present application, the lower push rod 31 and the upper push rod 33 in the push rod assembly 30 are arranged in parallel.

[0098] In this embodiment, the lower push rod 31 and the upper push rod 33 are arranged in parallel, so that the user can have a more comfortable gripping posture on the upper push rod 33, thereby further improving the user's experience of using the child stroller. At the same time, it is also convenient for the lower push rod 31 and the upper push rod 33 to be connected to each other, without considering the installation angle, which is conducive to improving the convenience of connecting the two.

[0099] Please refer to Figure 2 ,as well as Figures 6 to 8 In one embodiment of the present application, one end of the rear bracket 20 away from the front bracket 10 and / or the lower push rod 31 is connected to a rotatable rear moving wheel 21; in the folded state, the cart frame 100 is supported on a supporting surface (the supporting surface can also be said to be the ground) through the rotating connection between the rear moving wheel 21 and the lower push rod 31 and the upper push rod 33.

[0100] In this embodiment, after the stroller frame 100 is folded, it can be supported on the support surface by the rotation connection between the rear moving wheel 21 and the lower push rod 31 and the upper push rod 33, so that the stroller frame 100 can stand stably and automatically after being folded, which is conducive to further improving the convenience of using the child stroller and enhancing the user experience. In order to further improve the stability of the stroller frame 100 when standing after being folded, in one embodiment of the present application, a rotation joint 311 is formed at the rotation connection between the lower push rod 31 and the upper push rod 33, and the rotation joint 311 is formed with an abutment plane 311a; in the folded state, the stroller frame 100 is supported on the support surface by the rear moving wheel 21 and the abutment plane 311a.

[0101] Please refer to Figure 2 ,as well as Figures 6 to 8 In one embodiment of the present application, the folding process of the cart frame 100 proposed in the present application can be as follows: first, the upper push rod 33 in the push rod assembly 30 is folded and moved close to the lower push rod 31; then, the upper push rod 33 and the lower push rod 31 can be combined to rotate downward and fold under their own weight; at the same time, the lower push rod 31 can drive the front bracket 10 to move away from the rear bracket 20 through the linkage mechanism 50, and then fold and move close to the rear bracket 20, and the lower push rod 31 can also drive the seat frame 60 and the backrest member 70 to rotate upward at one end thereof through the linkage mechanism 50, so that the seat frame 60 is folded and moved close to the rear bracket 20, and the backrest member 70 is also folded and moved close to the rear bracket 20 under the action of its own weight, thereby completing the folding of the cart frame 100, and after folding, the rear moving wheel 21 and the abutment plane 311 stably stand on the support surface.

[0102] The present application also proposes a child stroller, which includes a stroller frame 100. The specific structure of the stroller frame 100 refers to the above-mentioned embodiment. Since the child stroller adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0103] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A cart frame, characterized in that: It includes a front bracket, a rear bracket, a push rod assembly and a linkage mechanism; Two of the front bracket, the rear bracket and the push rod assembly are rotatably connected, and the other one is rotatably connected to at least one of the two; The linkage mechanism is connected to the front bracket, the rear bracket and the push rod assembly, and the engaging position of the linkage mechanism and the push rod assembly is relatively located at one end of the push rod assembly close to the front bracket; When the push rod assembly is folded toward the rear bracket, the push rod assembly drives the front bracket to move in a direction away from the rear bracket and then toward the rear bracket through the linkage mechanism, so that the front bracket and the push rod assembly are synchronously folded toward the rear bracket.

2. The stroller frame according to claim 1, characterized in that: The linkage mechanism comprises a first connecting member and a second connecting member, wherein the first connecting member is rotatably connected to the front bracket, and the second connecting member is rotatably connected to the first connecting member and the rear bracket; in the unfolded state, a line connecting the rotation axis of the first connecting member and the front bracket and the rotation axis of the second connecting member and the rear bracket is defined as a first axis connecting line; The rotation axes of the first connecting member and the second connecting member are located at the lower side of the first axis connecting line; when driven by the push rod assembly, the engaging position of the first connecting member and the second connecting member moves upward and drives the first connecting member and the second connecting member to move together and fold upward; or, The rotation axes of the first connecting member and the second connecting member are located on the upper side of the first axis line; when driven by the push rod assembly, the engagement position of the first connecting member and the second connecting member moves downward and drives the first connecting member and the second connecting member to move together and fold downward.

3. The stroller frame according to claim 2, characterized in that: In the unfolded state, the joint position of the first connecting member and the second connecting member is arranged close to the rear bracket; And / or, the combination position of the second connecting member and the rear bracket is relatively located at an end of the rear bracket close to the front bracket; And / or, the combination position of the first connecting member and the front bracket is relatively located in the middle position of the front bracket; And / or, when the rotation axis of the first connecting member and the second connecting member is located on the lower side of the first axis line, the first connecting member is an arc-shaped structure, and in the expanded state, the concave arc surface of the first connecting member is set downward; the second connecting member is an arc-shaped structure at one end close to the first connecting member, and in the expanded state, the concave arc surface of the second connecting member is set upward in the expanded state, the concave arc surface of the first connecting member is tangent to the concave arc surface of the second connecting member, and the convex arc surface of the first connecting member is tangent to the convex arc surface of the second connecting member.

4. The stroller frame according to claim 2, characterized in that: In the unfolded state, one end of the second connecting member away from the first connecting member extends between the rear bracket and the push rod assembly; The linkage mechanism also includes a third connecting member, one end of the third connecting member is rotatably connected to an end of the second connecting member away from the first connecting member, and the other end of the third connecting member is rotatably connected to the push rod assembly. The engaging position of the third connecting member and the push rod assembly is relatively located at a position of the push rod assembly close to the front bracket.

5. The stroller frame according to claim 4, characterized in that: Define the distance between the rotation axis of the first connector and the second connector and the rotation axis of the second connector and the rear bracket as L5, and the distance between the rotation axis of the second connector and the rear bracket and the rotation axis of the second connector and the third connector as L6, where L6 is greater than L5; wherein L5 and L6 satisfy the following condition: 0.6≤L5 / L6≤0.8; And / or, in the unfolded state, the cart frame is defined to have an up and down direction, the opening of the angle formed by the front bracket and the rear bracket is set downward, the position of the rotation axis of the second connecting member and the third connecting member is higher than the position of the rotation axis of the second connecting member and the rear bracket; the opening of the angle formed by the second connecting member and the third connecting member is opposite to the opening of the angle formed by the push rod assembly and the rear bracket; in the unfolded state, the opening of the angle formed by the third connecting member and the second connecting member is set forward as a whole; when the push rod assembly is moved toward the rear bracket and folded, the engaging position of the third connecting member and the second connecting member moves backward as a whole; the engaging position of the first connecting member and the second connecting member moves upward as a whole.

6. The stroller frame according to claim 2, characterized in that: The cart frame further includes a seat frame, the seat frame being rotatably connected to at least one of the front bracket, the rear bracket and the push rod assembly; The linkage mechanism also includes a fourth connecting member, which is rotatably connected to the second connecting member and is close to one end rotatably connected to the first connecting member and the seat frame, so that when the first connecting member and the second connecting member are folded together, the seat frame can be driven by the fourth connecting member to fold close to the front bracket.

7. The stroller frame according to claim 6, characterized in that: The stroller frame further comprises a backrest member, which is rotatably connected to the seat frame and / or the fourth connecting member; The end of the fourth connecting member that is away from the second connecting member is rotatably connected to the end of the seat frame close to the backrest member, so that when the first connecting member and the second connecting member are folded and brought together, the end of the seat frame close to the backrest member can be driven by the fourth connecting member to rotate upward, and the end of the backrest member away from the seat frame can be rotated downward under the action of the backrest member's own gravity; The backrest member is rotatably connected to the fourth connecting member, and the rotation axis of the seat frame and the fourth connecting member is spaced from the rotation axis of the fourth connecting member and the backrest member.

8. The stroller frame according to any one of claims 1 to 7, characterized in that: The push rod assembly comprises a lower push rod and an upper push rod, one end of the lower push rod is rotatably connected to the front bracket and / or the rear bracket, and the other end is rotatably connected to the upper push rod; The linkage mechanism is connected to the lower push rod, and the push rod assembly can drive the front bracket to move through the linkage mechanism under the action of gravity in the folded state.

9. The stroller frame according to claim 8, characterized in that: One end of the rear support away from the front support and / or the lower push rod is connected to a rotatable rear moving wheel; a rotating joint is formed at the rotating connection between the lower push rod and the upper push rod, and the rotating joint forms an abutment plane; in the folded state, the cart frame is supported on the supporting surface by the rear moving wheel and the abutment plane; And / or, define the angle formed by the front bracket and the rear bracket as α, and the angle formed by the push rod assembly and the rear bracket as p, satisfying the relationship: 0.7≤α / p≤1.

1.

10. A baby stroller, characterized in that: Comprising a stroller frame as claimed in any one of claims 1 to 9.

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