Stroller frame and child stroller

Abstract

The utility model discloses a stroller frame and a child stroller. The stroller frame comprises side supports, a seat frame, a backrest piece and a linkage mechanism. The side bracket has an unfolded state and a folded state; the seat frame is rotationally connected to the side bracket; the backrest piece is rotationally connected to the seat frame; the linkage mechanism is connected to the side bracket and the seat frame; the stroller frame is defined to have the vertical direction in the using state, and the side support can drive the end, close to the backrest piece, of the seat frame and the end, close to the seat frame, of the backrest piece to rotate upwards through the linkage mechanism in the folded state. The end, away from the seat frame, of the backrest piece rotates downwards under the action of the gravity of the backrest piece. According to the technical scheme, the backrest piece does not need to be broken, and the structure of the stroller frame can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of children's products, and particularly relates to a stroller frame and a baby stroller applying the stroller frame. Background Art

[0002] At present, when the baby stroller in the related art is folded, the backrest member of the stroller frame is likely to hit the ground. Therefore, in order to ensure the size of the stroller frame after folding, the backrest member of this type of baby stroller usually needs to be designed with a break. That is, the backrest member needs to be truncated into at least two parts to accommodate the folding of the stroller frame, which in turn leads to a relatively complex structure of the stroller frame. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a stroller frame, aiming to enable the backrest member not to require a break design and simplify the structure of the stroller frame.

[0004] To achieve the above object, the stroller frame proposed by the utility model includes:

[0005] Side brackets, the side brackets having a deployed state and a folded state;

[0006] A seat frame, the seat frame being rotatably connected to the side brackets;

[0007] A backrest member, the backrest member being rotatably connected to the seat frame; and

[0008] A linkage mechanism, the linkage mechanism being connected to the side brackets and the seat frame;

[0009] It is defined that the stroller frame has an up-down direction in the use state. In the folded state, the side brackets can drive the seat frame to rotate upwards at one end close to the backrest member and the backrest member to rotate upwards at one end close to the seat frame through the linkage mechanism, and the end of the backrest member far from the seat frame rotates downwards under the action of its own gravity.

[0010] Optionally, the linkage mechanism includes a first connecting member, and the seat frame and the backrest member are respectively rotatably mounted on both sides of the first connecting member;

[0011] In the deployed state, a part of the first connecting member serves as an extension of the seat frame.

[0012] Optionally, the linkage mechanism further includes a second connecting member, and the second connecting member is rotatably connected to the side brackets;

[0013] The first connecting member is rotatably connected to one end of the second connecting member, and in the folded state, the side brackets can drive the second connecting member to rotate downwards at one end far from the rotatable connection with the first connecting member.

[0014] Optionally, the first connecting member includes a first body segment and a second body segment. One end of the first body segment is rotatably connected to the second connecting member; the second body segment is connected to the end of the first body segment away from the end rotatably connected to the second connecting member and is disposed at an angle to the first body segment;

[0015] In the unfolded state, the second body segment extends in the front-back direction as a whole. The seat frame is rotatably mounted at a position near the front end of the second body segment, and the backrest member is rotatably connected to a position near the rear end of the second body segment;

[0016] In the folded state, the second body segment is flipped and folded to extend in the front-back direction as a whole.

[0017] Optionally, the side bracket includes a front bracket, a rear bracket, and a push rod bracket. Two of the front bracket, the rear bracket, and the push rod bracket are rotatably connected, and the other is rotatably connected to at least one of the two;

[0018] The second connecting member is rotatably connected to the rear bracket. In the folded state, the push rod bracket can drive the end of the second connecting member away from the end rotatably connected to the first connecting member to rotate downward, and the end of the second connecting member away from the end rotatably connected to the first connecting member is rotatably connected to the push rod bracket.

[0019] Optionally, the linkage mechanism further includes a third connecting member. Two ends of the third connecting member are respectively rotatably connected to the end of the second connecting member away from the end rotatably connected to the first connecting member and the push rod bracket, and the third connecting member is disposed at an angle to the second connecting member.

[0020] Optionally, the linkage mechanism further includes a fourth connecting member. Two ends of the fourth connecting member are respectively rotatably connected to the front bracket and the end of the second connecting member near the end rotatably connected to the first connecting member.

[0021] Optionally, define the connecting line of the rotation axes of the fourth connecting member and the front bracket and the rotation axes of the second connecting member and the rear bracket as the axis connecting line. The rotation axes of the fourth connecting member and the second connecting member are located below the axis connecting line;

[0022] And / or, the fourth connecting member is an arc-shaped structure. In the unfolded state, the concave arc surface of the fourth connecting member is disposed downward;

[0023] And / or, the end of the second connecting member near the fourth connecting member is an arc-shaped structure. In the unfolded state, the concave arc surface of the fourth connecting member is disposed upward.

[0024] Optionally, the push rod frame includes a lower push rod and an upper push rod. One end of the upper push rod is rotatably connected to the front bracket and / or the rear bracket, and the other end is rotatably connected to one end of the lower push rod.

[0025] The end of the second connecting member away from the rotatable connection to the first connecting member is rotatably connected to the end of the lower push rod away from the upper push rod. In the state where the folded push rod frame is folded and close to the rear bracket, the push rod frame can drive the end of the second connecting member away from the rotatable connection to the first connecting member to rotate downward under the action of gravity.

[0026] The present utility model also provides a baby stroller, including the stroller frame as described above.

[0027] When the stroller frame of the technical solution of the present utility model is folded, during the folding process of the side brackets, the linkage mechanism can drive the end of the seat frame close to the backrest member and the end of the backrest member close to the seat frame to rotate upward, so that the end of the backrest member close to the seat frame can be lifted accordingly. At the same time, the end of the backrest member away from the seat frame rotates downward and folds under the action of its own gravity. In this way, due to the lifting effect of the linkage mechanism on the backrest member, the backrest member will not hit the ground. Therefore, the structural setting of the stroller frame in this solution enables the backrest member to be folded without the need for a break design, which is beneficial to simplifying the structure of the stroller frame. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0029] Figure 1 It is a schematic structural diagram of an embodiment of the stroller frame of the present utility model in an unfolded state;

[0030] Figure 2 It is Figure 1 Another perspective schematic diagram of the stroller frame in ;

[0031] Figure 3 It is Figure 1 A schematic diagram of a folding process of the stroller frame in ;

[0032] Figure 4 It is Figure 3 Another schematic diagram of a folding process of the stroller frame in ;

[0033] Figure 5 It is Figure 4Schematic diagram of the structure of the middle cart frame in the folded state.

[0034] Explanation of the reference numerals in the drawings:

[0035]

[0036]

[0037] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the accompanying drawings in combination with the embodiments. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0040] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0042] A baby stroller, also known as a pram, is mainly used for children to ride in. With the gradual development of baby strollers, in order to facilitate users to carry and use them, more and more baby strollers are designed to be foldable structures. Among them, a baby stroller mainly includes a stroller frame as the main framework and a cloth cover provided on the stroller frame. Therefore, in order to achieve the foldable storage of the baby stroller, the stroller frame is mainly designed to be a foldable structure.

[0043] However, when the baby stroller in the related art is folded, the backrest member of the stroller frame is likely to hit the ground. Therefore, in order to ensure the size of the stroller frame after folding, this type of baby stroller usually needs to design the backrest member to be interrupted. That is, the backrest member needs to be truncated into at least two parts to accommodate the folding of the stroller frame, which leads to a relatively complex structure of the stroller frame.

[0044] Therefore, based on the above considerations, in order to solve the problem of the relatively complex structure of the current stroller frame, the present application proposes a new type of stroller frame. The stroller frame innovatively connects the side bracket and the seat frame through a linkage mechanism, so that when the side bracket is folded, the linkage mechanism drives the end of the seat frame close to the backrest member and the end of the backrest member close to the seat frame to rotate upward, while the end of the backrest member away from the seat frame rotates downward under the action of its own gravity. At this time, during the folding process of the backrest member, the end close to the seat frame can be lifted, so that the end of the backrest member away from the seat frame will not collide with the ground after folding downward, thus realizing that the backrest member does not need to be interrupted and simplifying the structure of the stroller frame.

[0045] Next, the structure of the stroller frame proposed in the present application will be explained and described by way of embodiments. In an embodiment of the present application, please refer to Figures 1 to 5 , the stroller frame 100 proposed in the present application includes a side bracket 10, a seat frame 20, a backrest member 30, and a linkage mechanism 40. The side bracket 10 has an unfolded state and a folded state; the seat frame 20 is rotatably connected to the side bracket 10; the backrest member 30 is rotatably connected to the seat frame 20; the linkage mechanism 40 is connected to the side bracket 10 and the seat frame 20; it is defined that the stroller frame 100 has an up-down direction in the use state. When the side bracket 10 is in the folded state, the linkage mechanism 40 can drive the end of the seat frame 20 close to the backrest member 30 and the end of the backrest member 30 close to the seat frame 20 to rotate upward, and the end of the backrest member 30 away from the seat frame 20 rotates downward under the action of its own gravity.

[0046] The side brackets 10 can be provided in two groups at left-right and up-down intervals perpendicular to the up-down direction to support the seat frame 20, the backrest member 30, and other mechanisms of the stroller. Among them, each group of side brackets 10 can include a front bracket 11, a rear bracket 12, and a push rod bracket 13 that are rotatably connected as described below. It can be seen that the present application does not limit the structural shape of the side brackets 10. In addition, to improve the stability of the overall structure of the stroller frame 100, the stroller frame 100 can also include a connecting bracket 50 to connect the two groups of side brackets 10. Specifically, the number of connecting brackets 50 can be one, which connects two front brackets 11, or connects two rear brackets 12, or connects two push rod brackets 13. Or, the number of connecting brackets 50 can also be at least two to connect at least two of the two front brackets 11, two rear brackets 12, or two push rod brackets 13.

[0047] The seat frame 20 can be used for a child to sit on. Among them, the seat frame 20 can be a U-shaped rod structure to improve the lightweight effect of the seat frame 20. Of course, the seat frame 20 can also be a plate structure, and the present application does not limit the structural shape of the seat frame 20.

[0048] The backrest member 30 can be used for a child to lean on to further improve the stability of the child's sitting. Among them, the backrest member 30 can be a U-shaped rod structure to improve the lightweight effect of the backrest member 30. Of course, the backrest member 30 can also be a plate structure, and the present application does not limit the structural shape of the backrest member 30. In addition, the backrest member 30 can be directly rotatably connected to the seat frame 20, or can also be indirectly rotatably connected to the seat frame 20 through a linkage mechanism 40.

[0049] The linkage mechanism 40 can be used to connect the side brackets 10 and the seat frame 20 so that the side brackets 10 can drive the seat frame 20 to rotate and fold when rotating and folding. Among them, the linkage mechanism 40 can include a first connecting member 41 and a second connecting member 42 as described below. Of course, the linkage mechanism 40 can also include an angle sensor, a controller, and a motor. At this time, the angle sensor can detect the rotation angle of the push rod bracket 13 in the side brackets 10 when folding and approaching the rear bracket 12 and transmit it to the controller, and the controller can control the motor to drive the seat frame 20 to rotate according to the rotation and folding condition of the push rod bracket 13. It can be seen that the present application does not limit the structural type of the linkage mechanism 40. In addition, it should also be noted that one end of the backrest member 30 away from the seat frame 20 can be connected to the push rod bracket 13 in the side brackets 10 through a cloth cover.

[0050] When the trolley frame 100 of the technical solution of the present application is folded, during the folding process of the side bracket 10, the linkage mechanism 40 can drive one end of the seat frame 20 close to the backrest member 30 and one end of the backrest member 30 close to the seat frame 20 to rotate upward, so that one end of the backrest member 30 close to the seat frame 20 can be lifted accordingly. At the same time, the end of the backrest member 30 away from the seat frame 20 rotates downward and folds under the action of its own gravity. In this way, due to the lifting effect of the linkage mechanism 40 on the backrest member 30 during the folding process of the side bracket 10, the backrest member 30 will not hit the ground. Therefore, the structural setting of the trolley frame 100 in this solution enables the backrest member 30 to be folded without interruption design, which is beneficial to simplify the structure of the trolley frame 100.

[0051] Please refer to Figure 1 and Figure 2 In an embodiment of the present application, the linkage mechanism 40 includes a first connecting member 41, and the seat frame 20 and the backrest member 30 are respectively rotatably installed on both sides of the first connecting member 42; in the unfolded state, part of the first connecting member 41 serves as an extension of the seat frame 20.

[0052] In the unfolded state, the first connecting member 41 can be connected to the rear end of the seat frame 20, and the end of the first connecting member 41 connected to the seat frame 20 has the same extending direction as the seat frame 20 in the front-rear direction, thus realizing that part of the first connecting member 41 serves as an extension of the seat frame 20. Among them, the first connecting member 41 may include a first section 421 and a second section 422 that form an angle as described below. Of course, the first connecting member 41 may also be linear and only include the second section 422. It can be seen that the present application does not limit the structural shape of the first connecting member 41.

[0053] In this embodiment, the seat frame 20 and the backrest member 30 are respectively rotatably installed on the front and rear sides of the first connecting member 42, and part of the first connecting member 41 is used as an extension of the seat frame 20. At this time, the size of the seat frame 20 required to be designed in the front-rear direction can be reduced. Then, in the unfolded state, by using part of the first connecting member 41 as an extension of the seat frame 20, the support area of the seat frame 20 can still be ensured. In the folded state, the size of the trolley frame 100 in the up-down direction can be reduced. At the same time, it also enables the seat frame 20 and the backrest member 30 to be connected to the first connecting member 41 at different positions, which is convenient for setting the connection structure to improve the convenience of connecting the seat frame 20, the backrest member 30, and the linkage mechanism 40.

[0054] Please refer to Figures 1 to 5, in an embodiment of the present application, the linkage mechanism 40 further includes a second connecting member 42, and the second connecting member 42 is rotatably connected to the side bracket 10; the first connecting member 41 is rotatably connected to one end of the second connecting member 42, and the side bracket 10 can drive the second connecting member 42 to rotate downward away from the end rotatably connected to the first connecting member 41 in the folded state.

[0055] In this embodiment, the linkage mechanism 40 is arranged to include a first connecting member 41 and a second connecting member 42, so that the side bracket 10 can drive the second connecting member 42 to rotate downward away from the end rotatably connected to the first connecting member 41 when folding, and the end of the second connecting member 42 rotatably connected to the first connecting member 41 can correspondingly rotate upward, thereby driving the first connecting member 41 connected to the second connecting member 42 to move upward, so as to drive the end of the seat frame 20 close to the backrest member 30 and the end of the backrest member 30 close to the seat frame 20 to rotate upward through the first connecting member 41. At this time, the linkage mechanism 40 is a mechanical physical structure and does not involve circuits and air circuits, etc., which is beneficial to simplifying the structure of the linkage assembly 40 to improve the convenience of setting the linkage assembly 40.

[0056] Please refer to Figures 1 to 5 , the first connecting member 41 includes a first section 411 and a second section 412. One end of the first section 411 is rotatably connected to the second connecting member 42; the second section 412 is connected to the end of the first section 411 away from the end rotatably connected to the second connecting member 42 and is arranged at an angle with the first section 421; in the unfolded state, the second section 412 extends in the front-rear direction as a whole, the seat frame 20 is rotatably installed at a position close to the front end of the second section 412, and the backrest member 30 is rotatably connected to a position close to the rear end of the second section 412; in the folded state, the second section 412 is flipped and folded to extend in the front-rear direction as a whole.

[0057] In this embodiment, the first connecting member 41 is further arranged to include a first section 411 and a second section 412, so that the first connecting member 41 can facilitate the connection positions with the second connecting member 42, the seat frame 20 and the backrest member 30, and can simplify the structure of the first connecting member 41 and reduce the volume of the first connecting member 41 to improve the compactness of the stroller frame 100. Moreover, in the folded state, the second section 412 is flipped and folded to extend in the front-rear direction as a whole, so that the second section 412 can apply a forward force to the rear end of the seat frame 20 in the folded state to improve the stability and accuracy of the folding of the seat frame 20. Among them, in order to further improve the compactness of the structure of the linkage mechanism 40, in an embodiment of the present application, the extending direction of the first section 421 is the same as the extending direction of the second connecting member 42, and the shape of the first section 421 can be adapted to the shape of the second connecting member 42.

[0058] Please refer to Figure 1 and Figure 2 In an embodiment of the present application, in the unfolded state, on the projection plane perpendicular to the rotation axis of the seat frame 20 and the side bracket 10, the projections of the rotation centers of the seat frame 20 and the side bracket 10, the projection of the rotation center of the first connecting member 41 and the seat frame 20, and the projection of the rotation center of the backrest member 30 and the first connecting member 41 are located on the same straight line.

[0059] In this embodiment, the rotation centers of the seat frame 20 and the side bracket 10, the rotation center of the first connecting member 41 and the seat frame 20, and the rotation center of the backrest member 30 and the first connecting member 41 are arranged collinearly, so that the second section 422 of the first connecting member 41 can meet the extension and transition requirements of the seat frame 20 and the backrest member 30 with a relatively small size.

[0060] Please refer to Figure 1 , Figure 3 and Figure 4 In an embodiment of the present application, the side bracket 10 includes a front bracket 11, a rear bracket 12, and a push rod bracket 13. Two of the front bracket 11, the rear bracket 12, and the push rod bracket 13 are rotatably connected, and the other is rotatably connected to at least one of the two; the second connecting member 42 is rotatably connected to the rear bracket 12, and the push rod bracket 13 can drive the second connecting member 42 to rotate downward away from the end rotatably connected to the first connecting member 41 in the folded state.

[0061] In this embodiment, the side bracket 10 is provided to include a front bracket 11, a rear bracket 12, and a push rod bracket 13, so that the number of components of the side bracket 10 is relatively small to meet the basic structural requirements of the side bracket 10. Further, the second connecting member 42 is rotatably connected to the rear bracket 12, which can make the linkage mechanism 40 relatively close to both the seat frame 20 and the backrest member 30, thereby facilitating the connection between them. At the same time, driving the second connecting member 42 by the push rod bracket 13 can simplify the connection setting between them because their rotation directions are the same when the cart frame 100 is folded, which is beneficial to improving the convenience of the side bracket 10 in driving the linkage mechanism 40.

[0062] Please refer to Figure 1 In an embodiment of the present application, the end of the second connecting member 42 away from the end rotatably connected to the first connecting member 41 is rotatably connected to the push rod bracket 13.

[0063] In this embodiment, the second connecting member 42 and the push rod frame 13 are rotatably connected, so that there is always a connection relationship between the first connecting member 41 and the push rod frame 13, thereby improving the stability of the drive of the push rod frame 13 on the second connecting member 42. Among them, the second connecting member 42 can be directly rotatably connected to the push rod frame 13. Of course, it can also be indirectly rotatably connected to the push rod frame 13 through the third connecting member 43 introduced below, as long as the push rod frame 13 can drive the second connecting member 42 to rotate when folding.

[0064] Please refer to Figures 1 to 4 , in an embodiment of the present application, the linkage mechanism 40 further includes a third connecting member 43. Two ends of the third connecting member 43 are respectively rotatably connected to the end of the second connecting member 42 far from the end rotatably connected to the first connecting member 41 and the push rod frame 13, and the third connecting member 43 and the second connecting member 42 are arranged at an angle.

[0065] In this embodiment, the setting of the third connecting member 43, on the one hand, can make the length of the second connecting member 42 not need to be set too long, so as to reduce the volume of the second connecting member 42. On the other hand, it also enables the push rod frame 13 to drive the second connecting member 42 to rotate a relatively large stroke through the third connecting member 43, so that the seat frame 20 and the front bracket 11 can be closer together after folding. In this way, by reducing the volume of the second connecting member 42 and folding the seat frame 20 and the front bracket 11 closer, it is beneficial to further improve the compactness of the folded stroller frame 100. Further, the third connecting member 43 and the second connecting member 42 are arranged at an angle, which can improve the compactness of the distribution of the second connecting member 42 and the third connecting member 43, so as to further reduce the volume of the linkage mechanism 40. On the other hand, it can also facilitate the third connecting member 43 to apply a force to the second connecting member 42 and improve the convenience of the drive of the push rod frame 13 on the second connecting member 42.

[0066] Please refer to Figure 1 and Figure 2 , in an embodiment of the present application, the backrest member 30 is rotatably connected to the second connecting member 42. In the unfolded state, on the projection plane perpendicular to the rotation axis of the seat frame 20 and the side bracket 10, the projections of the rotation axes of the second connecting member 42 and the rear bracket 12, the projections of the rotation axes of the backrest member 30 and the first connecting member 41, and the projections of the rotation axes of the third connecting member 43 and the second connecting member 42 are located on the same straight line.

[0067] In this embodiment, the rotation axes of the second connecting member 42 and the rear bracket 12, the rotation axes of the backrest member 30 and the first connecting member 41, and the rotation axes of the third connecting member 43 and the second connecting member 42 are arranged collinearly. This enables the second connecting member 42 to conveniently apply a force to the seat pocket through the first connecting member 41 when rotating. At the same time, such an arrangement can further improve the compactness of the distribution among the linkage mechanism 40, the seat frame 20, and the backrest member 30, so as to reduce the volume of the stroller frame 100.

[0068] Please refer to Figures 1 to 4 , in an embodiment of the present application, the linkage mechanism 40 further includes a fourth connecting member 44. The two ends of the fourth connecting member 44 are respectively rotatably connected to the front bracket 11 and the end of the second connecting member 42 close to the end rotatably connected to the first connecting member 41.

[0069] In this embodiment, the setting of the fourth connecting member 44 enables the push rod frame 13 to further drive the front bracket 11 to fold through the linkage mechanism 40 when folding. This can enhance the linkage ability of the linkage mechanism 40, and thus is beneficial to further improving the convenience of using the baby stroller.

[0070] Please refer to Figure 1 and Figure 2 , in an embodiment of the present application, a connection line of the rotation axes of the fourth connecting member 44 and the front bracket 11 and the rotation axes of the second connecting member 42 and the rear bracket 12 is defined as an axis connection line 44a, and the rotation axis of the fourth connecting member 44 and the second connecting member 42 is located below the axis connection line 44a.

[0071] In this embodiment, the rotation axis of the fourth connecting member 44 and the second connecting member 42 is set below the axis connection line 44a, so that when the push rod frame 13 drives the fourth connecting member 44 to move upward through the second connecting member 42, it can first move to the rotation axis of the fourth connecting member 44 and the front bracket 11 is located on the axis connection line 44a, at which time the second connecting member 42 and the fourth connecting member 44 are pulled apart. Then move to the rotation axis of the fourth connecting member 44 and the front bracket 11 is located above the axis connection line 44a, at which time the second connecting member 42 and the fourth connecting member 44 are folded. In this way, by pulling apart and folding the second connecting member 42 and the fourth connecting member 44, the front bracket 11 can be moved away from the rear bracket 12 first, and then close to the rear bracket 12. At this time, the time required for the front bracket 11 to complete the folding and closing is extended, and the angle between the front bracket 11 and the rear bracket 12 can be reduced because it is smaller than the angle between the rear bracket 12 and the push rod frame 13, resulting in the possibility that the front bracket 11 completes the folding and closing to the rear bracket 12 before the push rod frame 13. In other words, the synchronization of the folding and closing of the front bracket 11 and the push rod frame 13 of the stroller frame 100 on the rear bracket 12 can be improved, so that the rear bracket 12 can be evenly stressed when the stroller frame 100 is folded, which facilitates 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 the stroller.

[0072] Please refer to Figure 1 and Figure 2 In one embodiment of the present application, the fourth connecting member 44 is an arc-shaped structure, and in the unfolded state, the concave arc surface of the fourth connecting member 44 is arranged downward.

[0073] In this embodiment, the fourth connecting member 44 is configured as an arc-shaped structure, so that it can meet the angle requirements required by the front bracket 11 and the rear bracket 12 when they are unfolded with a relatively small volume. At the same time, such a configuration also makes the shape of the fourth connecting member 44 more novel, which can improve the visual perception effect of the user and further enhance the user's experience.

[0074] In order to achieve the same effect, in one embodiment of the present application, the end of the second connecting member 42 close to the fourth connecting member 44 is an arc-shaped structure, and in the unfolded state, the inner concave arc surface of the fourth connecting member 44 is arranged upward. Moreover, in order to make the fourth connecting member 44 and the second connecting member 42 more adaptable and compact after folding, in one embodiment of the present application, in the unfolded state, the inner concave arc surface of the fourth connecting member 44 is tangent to the inner concave arc surface of the second connecting member 42, and the outer convex arc surface of the fourth connecting member 44 is tangent to the outer convex arc surface of the second connecting member 42.

[0075] Please refer to Figure 1, in an embodiment of the present application, the push rod frame 13 includes a lower push rod 131 and an upper push rod 133. One end of the upper push rod 131 is rotatably connected to the front bracket 11 and / or the rear bracket 12, and the other end is rotatably connected to one end of the upper push rod 133.

[0076] In this embodiment, the push rod frame 13 is arranged to include a lower push rod 131 and an upper push rod 133 that are rotatably connected to each other, so that it is convenient for the user to hold and use in the unfolded state, and can be rotated and folded when not in use. That is, when the push cart frame 100 meets the requirement of a convenient holding height for the user, after folding, the size in the up and down direction can be reduced, thereby further improving the compactness of the folding of the push cart frame 100. Among them, one end of the second connecting member 42 in the linkage mechanism 40 introduced above, which is far from the end rotatably connected to the first connecting member 41, can be rotatably connected to the end of the lower push rod 131 far from the upper push rod 133. At this time, the joint position of the linkage mechanism 40 and the push rod frame 13 is close to the front bracket 11 and the rear bracket 12. On the one hand, it can make them relatively close to each other, so as to reduce the volume of the linkage mechanism 40 and improve the convenience of connecting them. On the other hand, it can also facilitate the lower push rod 131 and the upper push rod 133 in the push rod frame 13 to better act on the linkage mechanism 40 with the gravity of the push rod frame 13 after folding, which is beneficial to improving the driving effect on the linkage mechanism 40. In addition, when the linkage mechanism 40 introduced above further includes a third connecting member 43, one end of the third connecting member 43 far from the second connecting member 42 can be rotatably connected to the end of the lower push rod 131 far from the upper push rod 133.

[0077] Please refer to Figures 1 to 5 , in an embodiment of the present application, in the state where the folded push rod frame 13 is folded and close to the rear bracket 12, the push rod frame 13 can drive one end of the second connecting member 42, which is far from the end rotatably connected to the first connecting member 41, to rotate downward under the action of gravity.

[0078] In this embodiment, setting the push rod frame 13 to be able to drive the linkage mechanism 40 under the action of gravity can improve the convenience of using the push cart frame 100, so as to further enhance the user experience.

[0079] Please refer to Figure 1 , Figure 2 and Figure 3 , in an embodiment of the present application, the rotation axes of the front bracket 11, the rear bracket 12, the lower push rod 131 and the seat frame 20 coincide.

[0080] In this embodiment, the front bracket 11, the rear bracket 12, the lower push rod 131 and the seat frame 20 are coaxially rotatably connected, so that the rotation connection of the four can be realized by using the same connection structure, which is beneficial to improving the assembly efficiency.

[0081] Please refer to the reference Figures 2 to 5 In an embodiment of the present application, the folding process of the stroller frame 100 proposed in the present application can be as follows: First, the upper push rod 133 is folded and brought closer to the lower push rod 131; then the folded push rod frame 13 can rotate downward and fold under its own gravity; at the same time, on the one hand, the push rod frame 13 can drive the front bracket 11 to first move away from the rear bracket 12 through the linkage mechanism 40 and then fold and approach the rear bracket 12. On the other hand, the push rod frame 13 can also drive the ends of the seat frame 20 and the backrest member 30 that are close to each other to rotate upward through the linkage mechanism 40, so that the seat frame 20 folds and approaches the rear bracket 12, and the end of the backrest member 30 that is far from the seat frame 20 also folds and approaches the rear bracket 12 under the action of the self-gravity of the backrest member 30, thus completing the folding of the stroller frame 100.

[0082] The present application also proposes a baby stroller, which includes a stroller frame 100. The specific structure of the stroller frame 100 refers to the above-mentioned embodiment. Since this baby stroller adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0083] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the inventive concept of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A cart frame, characterized in that: include: A side bracket, wherein the side bracket has an unfolded state and a folded state; a seat frame, the seat frame being rotatably connected to the side bracket; a backrest member, the backrest member being rotatably connected to the seat frame; as well as a linkage mechanism connected to the side bracket and the seat frame; It is defined that the cart frame has an up and down direction when in use, and the side bracket can drive the end of the seat frame close to the backrest and the end of the backrest close to the seat frame to rotate upward through the linkage mechanism when in a folded state, and the end of the backrest away from the seat frame rotates downward under the action of the backrest's own gravity.

2. The stroller frame according to claim 1, characterized in that: The linkage mechanism comprises a first connecting member, and the seat frame and the backrest member are rotatably mounted on both sides of the first connecting member respectively; In the unfolded state, part of the first connecting member serves as an extension of the seat frame.

3. The stroller frame according to claim 2, characterized in that: The linkage mechanism further includes a second connecting member, which is rotatably connected to the side bracket; The first connecting member is rotatably connected to one end of the second connecting member, and the side bracket can drive the second connecting member to rotate downward away from the end rotatably connected to the first connecting member in a folded state.

4. The stroller frame according to claim 3, characterized in that: The first connecting member includes a first segment and a second segment, one end of the first segment is rotatably connected to the second connecting member; the second segment is connected to the first segment away from the end of the first segment that is rotatably connected to the second connecting member, and is arranged at an angle to the first segment; In the unfolded state, the second section body is extended in the front-rear direction as a whole, the seat frame is rotatably mounted at a position of the second section body close to the front end, and the backrest member is rotatably connected to a position of the second section body close to the rear end; In the folded state, the second section is turned over and folded until the whole body is extended in the front-back direction.

5. The stroller frame according to claim 3, characterized in that: The side bracket comprises a front bracket, a rear bracket and a push rod bracket, two of the front bracket, the rear bracket and the push rod bracket are rotatably connected, and the other is rotatably connected to at least one of the two; The second connecting member is rotatably connected to the rear bracket, and the push rod frame can drive the second connecting member to rotate downward away from the end rotatably connected to the first connecting member in a folded state, and the second connecting member is rotatably connected to the push rod frame away from the end rotatably connected to the first connecting member.

6. The stroller frame according to claim 5, characterized in that: The linkage mechanism also includes a third connecting member, both ends of which are rotatably connected to the second connecting member and away from one end rotatably connected to the first connecting member and the push rod frame, and the third connecting member and the second connecting member are arranged at an angle.

7. The stroller frame according to claim 5, characterized in that: The linkage mechanism further includes a fourth connecting member, both ends of which are rotatably connected to the front bracket and the second connecting member is close to an end rotatably connected to the first connecting member.

8. The stroller frame according to claim 7, characterized in that: A line connecting the rotation axis of the fourth connecting member and the front bracket and the rotation axis of the second connecting member and the rear bracket is defined as an axis connecting line, and the rotation axis of the fourth connecting member and the second connecting member is located below the axis connecting line; And / or, the fourth connecting member is an arc-shaped structure, and in the unfolded state, the inner concave arc surface of the fourth connecting member is arranged downward; And / or, one end of the second connecting member close to the fourth connecting member is an arc-shaped structure, and in the unfolded state, the concave arc surface of the fourth connecting member is arranged upward.

9. The stroller frame according to claim 5, characterized in that: The push rod frame comprises a lower push rod and an upper push rod, one end of the upper push rod is rotatably connected to the front bracket and / or the rear bracket, and the other end is rotatably connected to one end of the upper push rod; The end of the second connecting member that is rotatably connected to the first connecting member is rotatably connected to the end of the lower push rod that is away from the upper push rod. When the folded push rod frame is folded close to the rear bracket, the push rod frame can drive the second connecting member to rotate downward away from the end that is rotatably connected to the first connecting member under the action of gravity.

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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