Stroller frame capable of being folded twice

Abstract

Provided is a stroller frame capable of being folded twice. The stroller frame has an unfolded use state, a first folded state and a second folded state. At least two transverse supports (2) are connected between side supports (1), and are pivotally connected by means of pivoting rotating shafts of folding structures (21). When in the unfolded use state, the pivoting rotating shafts of at least two folding structures (21) have inconsistent folding directions and interfere with each other, so that the stroller frame is in a stable unfolded use state, and therefore, no additional locking mechanism is required, thereby ensuring that the structure of the entire stroller is simple and lightweight. Moreover, the side supports (1) are first folded in the front-back direction and then folded in the left-right direction, and after the two folding operations, the stroller frame has a minimized folding size, thereby meeting the requirements of people for carrying and storing the stroller when going out, and in particular meeting the requirements of people for directly carrying the stroller frame on an airplane after the stroller frame is folded, and has the characteristic of being easy to fold and store.

Description

A baby carriage frame capable of being folded twice

[0001] This application is based on and claims priority to an application filed in China with application number CN2024100119508, filed on January 2, 2024. The disclosure of the application is incorporated herein as a whole.

Technical field

[0002] The present application relates to a baby carriage frame, and in particular to a baby carriage frame that can be folded twice. [Background Technology]

[0003] Nowadays, in order to make it easier to travel with infants and young children, people usually carry corresponding strollers when they go out. Therefore, when purchasing a stroller, people pay special attention to the size of the stroller frame after folding and whether it meets the requirements for folding and storage, especially when traveling, to meet the folding size requirements for being able to be carried directly on the plane. Chinese patent CN201410624297.9 discloses a twice-foldable stroller, including side brackets located on both sides and at least one cross brace connecting the side brackets on both sides. The side brackets on each side include a push rod, a front wheel bracket and a rear wheel bracket that are rotatably connected to each other. In a first folding state, the push rod, the front wheel bracket and the rear wheel bracket are rotated to a close-together state; each cross brace has a first transverse folding rotation point and a second transverse folding rotation point. The stroller can not only achieve the first folding, but also achieve the second folding of the two side brackets, thereby further reducing the volume occupied by the entire stroller in these states.

[0004] However, the structure disclosed in Chinese patent CN201410624297.9 is relatively complex for the second folding, resulting in high manufacturing costs, and the folding operation involves many steps, which is inconvenient to operate. This application is developed to address the problems existing in the prior art.

[0005] [Utility Model Content]

[0006] The present application provides a twice-foldable stroller frame, wherein at least two cross braces are connected between side supports and are pivotally connected by folding. When in the unfolded state, the pivot axes of at least two folding structures have inconsistent folding directions and interfere with each other, so that the stroller frame is in a stable unfolded state and does not require additional locking mechanisms, thereby ensuring the simplicity and lightweight of the entire vehicle structure. Moreover, the side supports are first folded in the front-to-back direction and then in the left-to-right direction. After folding twice, the stroller frame has a minimized folded size, meeting the requirements of people for carrying and storing when going out, and in particular meeting the requirement that the stroller frame can be directly carried on an airplane after folding, and has the characteristic of being easy to fold and store.

[0007] In order to solve the above technical problems, the present application includes a baby carriage frame that can be folded twice, and the baby carriage frame has an unfolded use state, a first folded state, and a second folded state, including a side bracket 1 and a plurality of cross braces 2 connected between the two side brackets 1, each side bracket 1 includes a push rod assembly 11, a front foot support assembly 12 and a rear foot support assembly 13 that are rotatably connected to each other, and the push rod assembly 11, A linkage folding assembly 14 is provided between the front foot support assembly 12 and the rear foot support assembly 13, and the side bracket 1 is also provided with a frame locking assembly 15 for locking the linkage folding assembly 14 so that the baby carriage frame remains locked in the unfolded use state. After the frame locking assembly 15 is unlocked, the push rod assembly 11, the front foot support assembly 12 and the rear foot support assembly 13 are folded together under the linkage of the linkage folding assembly 14 and converted from the unfolded use state to the first folded state; the same side end of the cross brace 2 is provided with a folding structure 21 that allows the side bracket 1 to be folded relative to the cross brace 2, and the pivot axes of the at least two folding structures 21 on the same side are configured to have inconsistent folding directions in the unfolded use state, thereby restricting the side bracket 1 from being folded relative to the cross brace 2, and the pivot axes of the folding structures 21 on the same side are configured to have consistent folding directions in the first folded state, thereby allowing the side bracket 1 to be folded a second time relative to the cross brace 2, thereby converting from the first folded state to the second folded state.

[0008] As described above, a baby carriage frame that can be folded twice is provided with a folding structure 21 at both ends of each cross brace 2, which allows the side bracket 1 to be folded relative to the cross brace 2. The pivot axis of the folding structure 21 on the same side is configured to have a consistent folding direction in the first folding state, allowing the two side brackets 1 to be flipped toward each other relative to the cross brace 2 for a second folding; and the folding structure 21 is configured to only allow the side bracket 1 to be folded in one direction relative to the cross brace 2.

[0009] As described above, a twice-foldable baby carriage frame is provided with a cross brace 2 between at least two of the two front leg support assemblies 12, between the two rear leg support assemblies 13, between the two linked folding assemblies 14, and between the two push rod assemblies 11, and all the cross braces 2 are correspondingly flipped during the process of changing from the unfolded use state to the first folded state so that the pivot axes of all the folding structures 21 are parallel to each other, and all the cross braces 2 are on the same plane.

[0010] As described above, a baby carriage frame that can be folded twice, the upper part of the push rod assembly 11 is relatively fixedly connected to a push rod folding rod 1123, and the two ends of the push rod folding rod 1123 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21. The outer end of the push rod folding rod 1123 is connected to a handle 1124, and the handle 1124 is configured to clamp the front foot support assembly 12 and the rear foot support assembly 13 in the folding space 7 surrounded by the handle 1124 and the cross brace 2 when in the second folding state.

[0011] As described above, a baby carriage frame that can be folded twice, the linkage folding assembly 14 includes a front linkage rod 141 and a power rod 142, the front end of the front linkage rod 141 is pivotally connected to the front foot support assembly 12, the rear end of the front linkage rod 141 is pivotally connected to the front end of the power rod 142, the middle part of the power rod 142 is pivotally connected to the rear foot support assembly 13, and the rear end of the power rod 142 is pivotally connected to a sliding sleeve 143 that can be slidably connected to the push rod assembly 11 and can be locked and unlocked by the frame locking assembly 15.

[0012] As described above, in a baby carriage frame that can be folded twice, the frame locking assembly 15 includes a frame locking tongue 151 elastically and telescopically arranged at the lower part of the push rod assembly 11 and a frame locking hole 152 provided on the sliding sleeve 143 for inserting the frame locking tongue 151. The frame locking tongue 151 is configured to be activated to release the locking state of the sliding sleeve 143 when the unfolded use state is to be converted into the first folded state.

[0013] As described above, a stroller frame that can be folded twice also includes a seat assembly 3, which includes a seat support 31 and a seat rod 32. The seat support 31 is located below the sliding sleeve 143 and is rotatably connected to the lower part of the push rod assembly 11. The seat rod 32 is slidably connected to the seat support 3 and can drive the seat support 3 to rotate relative to the push rod assembly 11. The rear end of the seat rod 32 is connected to the middle part of the power rod 142.

[0014] As a first embodiment of the push rod assembly 11 of the present application, the push rod assembly 11 includes a lower push rod 111 and an upper push rod 112, the upper end of the lower push rod 111 is connected to a lower joint block 1111, and the lower end of the upper push rod 112 is connected to an upper joint block 1121 pivotally connected to the lower joint block 1111, a joint locking assembly 5 is provided between the lower joint block 1111 and the upper joint block 1121, and the upper push rod 112 is provided with a joint unlocking assembly 6 for unlocking the joint locking assembly 5; the frame locking assembly 15 also includes a frame unlocking linkage 153, the upper end of the frame unlocking linkage 153 is eccentrically connected to the upper joint block 1122, and the lower end of the frame unlocking linkage 153 is connected to the frame lock tongue 151; the upper part of the upper push rod 112 is relatively fixedly connected to a push rod folding rod 1123, and the two ends of the push rod folding rod 1123 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21.

[0015] As described above, a baby carriage frame that can be folded twice, the joint locking assembly 5 includes a joint locking hole 51 and a joint locking pin 52, the joint locking hole 51 is eccentrically arranged on the lower joint block 1111, the joint locking pin 52 is arranged on the upper joint block 1121 and can be elastically extended and inserted into the joint locking hole 51, the joint unlocking assembly 6 includes a joint unlocking linkage 61 and a joint unlocking switch 62, one end of the unlocking linkage 61 is connected to the joint locking pin 52, the outer end of the push rod folding rod 1123 extends forward to form a handle 1124, and the other end of the unlocking linkage 61 is connected to the joint unlocking switch 62 arranged on the handle 1124.

[0016] As described above, a baby carriage frame that can be folded twice, the folding structure 21 includes a connecting groove 211 provided at the end of the push rod folding rod 1123 and a connecting tenon 212 provided at the end of the cross brace 2, the connecting tenon 212 extends into the connecting groove 211 and is pivotally connected to each other, and a limiting portion 213 is formed at the root of the tenon 212 and the end side of the connecting groove 211 for limiting the push rod folding rod 1123 from folding relative to the cross brace 2 in the opposite direction of normal folding when in the unfolded use state.

[0017] In the above-mentioned twice-foldable baby carriage frame, the middle parts of the two power rods 142 are relatively fixedly connected with the middle folding rods 144 extending forward, and the ends of the two middle folding rods 144 are correspondingly connected to the two ends of the cross brace 2 through the folding structure 21.

[0018] As a second embodiment of the push rod assembly 11 of the present application, the push rod assembly 11 includes a lower push rod 111 and an upper push rod 112, and the upper push rod 112 is telescopically connected to the upper push rod 112. A telescopic control assembly is provided between the lower push rod 111 and the upper push rod 112 for relative locking of the lower push rod 111 and the upper push rod 112, and the lower part of the upper push rod 112 is provided with a trigger member for triggering the frame lock tongue 151 to release the locking state of the sliding sleeve 143; the upper part of the upper push rod 112 is relatively fixedly connected to a push rod folding rod 1123, and the two ends of the push rod folding rod 1123 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21, and the outer end of the push rod folding rod 1123 extends backward to form a handle 1124.

[0019] As described above, a baby carriage frame that can be folded twice, each front foot support assembly 12 is relatively fixedly connected to a front foot folding rod 121 extending inward and downward at an angle at the bottom, and the ends of the two front foot folding rods 121 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21; the rear foot support assembly 13 is relatively fixedly connected to a rear foot folding rod 131 extending backward and upward at an angle at the bottom, and the ends of the two rear foot folding rods 131 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21; the rear foot folding rods 131 and the front foot folding rods 121 are configured to be staggered up and down and parallel to each other in the first folded state.

[0020] As described above, a baby carriage frame that can be folded twice, the folding structure 21 is a connecting groove 211 provided on the end of the cross brace 2, and the ends of the front leg folding rod 121 and the rear leg folding rod 131 form corresponding connecting protrusions 212 that extend into the connecting groove 211 and are pivotally connected to each other, and the bottom of the connecting groove 211 is inclined along the direction of the end of the cross brace 2 to form a limiting portion 213, and the limiting portion 213 limits the front leg folding rod 121 and the rear leg folding rod 131 from folding relative to the corresponding cross brace 2 in the opposite direction of normal folding.

[0021] Compared with the prior art, this application has the following advantages:

[0022] 1. The present application has a double folding function, which minimizes the volume of the entire vehicle frame after folding, meeting the user's carrying and storage requirements, including meeting the size requirements for carrying on an airplane after folding.

[0023] 2. By cleverly and reasonably setting up the linked folding assembly and the frame locking assembly, that is, by controlling the locking and unlocking of the sliding sleeve, the side bracket can be easily folded to the first folding state. The unlocking of the entire vehicle is easy to operate and has a simple structure, which is convenient for users. It also minimizes the number of rods in the entire vehicle, effectively reducing the weight and production costs of the entire vehicle, which is conducive to improving product competitiveness.

[0024] 3. By providing a transverse support and a folding structure, the pivot axis of the folding structure has inconsistent folding directions in the unfolded state, thereby limiting the folding of the side bracket relative to the transverse support, and in the first folded state, all the folding structures have the same folding direction. Therefore, in the unfolded state, the side bracket and the transverse support are interfered with each other by utilizing the inconsistent folding directions of the folding structures. Therefore, there is no need to provide an additional locking mechanism, thereby ensuring the stability and safety of the baby carriage frame in the unfolded state, further simplifying the connection structure of the entire vehicle.

[0025] 4. The seat components are folded together with the entire vehicle, without the need to dismantle them, making it more convenient for users.

[0026] 5. In the second folding state, the handle provided on the upper push rod is configured to clamp the front leg support assembly and the rear leg support assembly in the folding space enclosed by the handle and the cross brace, thereby avoiding the problem of the handle protruding and affecting storage. At the same time, the entire vehicle that has completed the second folding state is in a stable and compact state, so that the folding of the entire vehicle is kept to a minimum.

[0027] 6. After the upper push rod is unlocked relative to the lower push rod, the entire frame only needs to unlock the sliding sleeve, and the lower push rod, front foot support assembly and rear foot support assembly do not need to be provided with a locking structure, making the connection between the lower push rod, front foot support assembly and rear foot support assembly simpler.

Brief Description of the Drawings

[0028] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, wherein:

[0029] FIG1 is a schematic diagram of the three-dimensional structure of the present application in an unfolded state;

[0030] FIG2 is a partial cross-sectional side view of the sliding sleeve of the present application in the deployed state;

[0031] FIG3 is a partial cross-sectional side view of the sliding sleeve of the present application in the deployed state;

[0032] FIG4 is an exploded view of the baby carriage frame of the present application;

[0033] FIG5 is an exploded view of the rear foot support assembly of the present application;

[0034] FIG6 is an exploded view of the forefoot support assembly of the present application;

[0035] FIG7 is an exploded view of the connection between the upper push rod and the cross brace in the present application;

[0036] FIG8 is a partial cross-sectional view of the upper joint block and the lower joint block being locked in the present application;

[0037] FIG9 is a schematic diagram of the three-dimensional structure of the connection between the linkage folding assembly and the seat assembly of the present application;

[0038] FIG10 is a schematic diagram of the three-dimensional structure of the upper push rod being folded in the present application;

[0039] FIG11 is a side view of the upper push rod in the present application being folded;

[0040] FIG12 is a schematic diagram of a three-dimensional structure of the upper push rod after folding in the present application;

[0041] FIG13 is a second schematic diagram of the three-dimensional structure of the upper push rod after folding in the present application;

[0042] FIG14 is a schematic diagram of the three-dimensional structure of the present application transitioning from an unfolded use state to a first folded state;

[0043] FIG15 is a side view of the present application transitioning from an unfolded use state to a first folded state;

[0044] FIG16 is a schematic diagram of the three-dimensional structure of the first receiving and disbursing state of the present application;

[0045] FIG17 is a side view of the first folded state of the present application;

[0046] FIG18 is a schematic diagram of the structure of the present invention when the device is transformed from a first folded state to a second folded state;

[0047] FIG19 is a schematic diagram of the three-dimensional structure of the second folded state of the present application. [Specific implementation method]

[0048] The following describes the implementation of the present application in detail with reference to the accompanying drawings.

[0049] The present application discloses a stroller frame that can be folded twice, as shown in Figures 1, 2, 16, and 19. The stroller frame has an unfolded use state, a first folded state, and a second folded state, including a side bracket 1 and a plurality of cross braces 2 connected between the two side brackets 1. Each side bracket 1 includes a push rod assembly 11, a front foot support assembly 12, and a rear foot support assembly 13 that are rotatably connected to each other. The push rod assembly 11 includes a lower push rod 111 and an upper push rod 112 that are relatively rotatably connected or telescopically connected. A linkage folding assembly 14 is provided between the push rod assembly 11, the front foot support assembly 12, and the rear foot support assembly 13 on the same side. A frame locking assembly 15 for locking the linkage folding assembly 14 so that the stroller frame remains locked in the unfolded use state is further provided on the side bracket 1. After the locking assembly 15 is unlocked, the push rod assembly 11, the front foot support assembly 12 and the rear foot support assembly 13 are brought together and folded under the linkage of the linkage folding assembly 14 and converted from the expanded use state to the first folded state; the same side end of the cross brace 2 is provided with a folding structure 21 that allows the side bracket 1 to be folded relative to the cross brace 2, and the pivot axes of at least two folding structures 21 on the same side are configured to have inconsistent folding directions when in the expanded use state, thereby limiting the folding of the side bracket 1 relative to the cross brace 2, that is, the pivot axes of each folding structure have inconsistent folding directions to cause mutual interference, thereby limiting the folding of the side bracket relative to the cross brace and maintaining a stable expanded use state, and thus ensuring the stability and safety of the baby carriage frame in the expanded use state without the need for an additional locking mechanism. Moreover, the folding structure 21 on the same side is configured to have a consistent folding direction in the first folded state, allowing the side bracket 1 to be folded twice relative to the cross brace 2, and then converted from the first folded state to the second folded state, thereby simplifying the connection structure of the entire vehicle; more importantly, the present application cleverly and reasonably arranges the linkage folding component and the frame locking component, that is, through the locking and unlocking of the linkage folding component, the side bracket can conveniently complete the first folding state and adjust the folding direction of the pivot axis of the folding structure at the end of the cross brace 2, that is, the original state of having inconsistent folding directions and interfering with each other is converted into a consistent folding direction, thereby achieving secondary folding, minimizing the volume of the entire vehicle frame after folding, meeting the user's carrying and storage requirements, including meeting the size requirements for carrying on an airplane after folding, and the unlocking of the entire vehicle is easy to operate and simple in structure, which is convenient for users to use, and minimizes the number of rods of the entire vehicle, effectively reducing the weight and production cost of the entire vehicle, which is conducive to improving product competitiveness.

[0050] As shown in Figures 16 and 19, in order to maximize the compactness of the secondary folding structure, each of the two ends of the cross brace 2 is provided with a folding structure 21 that allows the side bracket 1 to be folded relative to the cross brace 2. The folding structure 21 on the same side is configured to have a consistent folding direction in the first folding state and allows the two side brackets 1 to be flipped toward each other relative to the cross brace 2 for secondary folding; as shown in Figures 6 and 7, the folding structure 21 is configured to only allow the side bracket 1 to be folded in one direction relative to the cross brace 2, ensuring the uniqueness of the folding operation, facilitating user use, and avoiding the problem of uneven and non-uniform folding that cannot meet the requirements of minimizing the folding volume.

[0051] At least two cross braces are provided between the two side brackets. However, in the present application, as shown in Figures 16 and 18, in order to stabilize the entire frame, cross braces 2 are provided between the two front foot support assemblies 12, between the two rear foot support assemblies 13, between the two linked folding assemblies 14, and between the two push rod assemblies 11. Specifically, as shown in Figure 9, a middle folding rod 144 extending forward is relatively fixedly connected to the middle of the two power rods 142, and the ends of the two middle folding rods 144 are connected to the two ends of the cross brace 2 via a folding structure 21; as shown in Figure 6, a front foot folding rod 121 extending inward and downward is relatively fixedly connected to the lower portion of each front foot support assembly 12, and the ends of the two front foot folding rods 121 are connected to the two ends of the cross brace 2 via a folding structure 21; as shown in Figure 5, a rear foot folding rod 131 extending backward and upward is relatively fixedly connected to the lower portion of the rear foot support assembly 13, and the ends of the two rear foot folding rods 131 are connected to the two ends of the cross brace 2 via a folding structure 21. As shown in Figures 16 and 18, all the cross braces 2 between the two side brackets are in the same plane in the first folded state, further making the folded volume of the entire vehicle smaller and neater.

[0052] As shown in Figures 5, 6 and 9, for the folding structure 21 connecting the middle folding rod 144, the front foot folding rod 121 and the rear foot folding rod 131 with the cross brace, the folding structure 21 is a connecting groove 211 provided on the end of the cross brace 2, and the ends of the middle folding rod 144, the front foot folding rod 121 and the rear foot folding rod 131 form corresponding connecting protrusions 212 and extend into the connecting groove 211 and are pivotally connected to each other through a pivot shaft, and the bottom of the connecting groove 211 is inclined along the direction of the end of the cross brace 2 to form a limiting portion 213. When in the first folded state, the limiting portion 213 correspondingly limits the middle folding rod 144, the front foot folding rod 121 and the rear foot folding rod 131 to fold relative to the corresponding cross brace 2 in the opposite direction of normal folding.

[0053] As shown in Figures 4 and 7, the upper part of the upper push rod 112 is relatively fixedly connected to a push rod folding rod 1123, and the two ends of the push rod folding rod 1123 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21. The folding structure 21 includes a connecting groove 211 provided at the end of the push rod folding rod 1123 and a connecting tenon 212 provided at the end of the cross brace 2. The connecting tenon 212 extends into the connecting groove 211 and is pivotally connected to each other through a pivot shaft. The root of the tenon 212 and the end side of the connecting groove 211 form a limiting portion 213. When the stroller frame is in the unfolded use state, as shown in Figure 1, the limiting portion 213 limits the push rod folding rod 1123 from folding relative to the cross brace 2 in the opposite direction of normal folding.

[0054] As shown in Figures 16 and 18, the push rod folding rod 1123, the middle folding rod 144, the front foot folding rod 121 and the rear foot folding rod 131 are in the first folded state, and the cross braces 2 connected to the push rod folding rod 1123, the middle folding rod 144, the front foot folding rod 121 and the rear foot folding rod 131 are correspondingly flipped during the process of changing from the unfolded use state to the first folded state, and are configured to be staggered up and down and parallel to each other, and also make the pivot axes of all folding structures 21 parallel to the axis of the rear foot support assembly 13. Therefore, at this time, the side bracket 1 can be folded around the pivot axes of the folding structure 21 relative to all the cross braces 2 to achieve secondary folding. In addition, when the stroller frame completes the first folding state, as shown in Figure 16, the folding direction is restricted by the limit portion 213, and the left and right side brackets can only be folded towards each other. Therefore, when the stroller frame is in the first folding state, the folded side brackets can only be folded twice in a unique direction, ensuring that when different users perform the folding operation, the folding effect is unified through a unique action sequence.

[0055] As shown in Figures 10-19, the upper part of the push rod assembly 11 is relatively fixedly connected to a push rod folding rod 1123, and the two ends of the push rod folding rod 1123 are correspondingly connected to the two ends of the cross brace 2 through a folding structure 21. The outer end of the push rod folding rod 1123 is connected to a handle 1124, and the handle 1124 is configured to clamp the front foot support assembly 12 and the rear foot support assembly 13 in the folding space 7 surrounded by the handle 1124 and the cross brace 2 when in the second folding state. This design avoids the problem of handle protrusion affecting storage; as shown in Figure 19, it also allows the entire vehicle that has completed the second folding state to be in a stable and compact state, so that the folding of the entire vehicle is minimized.

[0056] As shown in Figures 2-4, the linkage folding assembly 14 includes a front linkage rod 141 and a power rod 142. The front end of the front linkage rod 141 is pivotally connected to the front foot support assembly 12, the rear end of the front linkage rod 141 is pivotally connected to the front end of the power rod 142, the middle part of the power rod 142 is pivotally connected to the rear foot support assembly 13, and the rear end of the power rod 142 is pivotally connected to a sliding sleeve 143 that can be slidably connected to the push rod assembly 11 and can be locked and unlocked by the frame locking assembly 15. The frame locking assembly 15 includes a frame locking tongue 151 that is elastically and telescopically arranged at the lower part of the push rod assembly 11 and a frame locking hole 152 provided on the sliding sleeve 143 for inserting the frame locking tongue 151. The frame locking tongue 151 is configured to be acted on and release the locking state of the sliding sleeve 143 when the unfolded use state is to be converted into the first folded state. When the push rod assembly 11 is unlocked, the entire frame only needs to unlock the sliding sleeve, and the push rod assembly 11, the front foot support assembly and the rear foot support assembly do not need to be provided with a locking structure, so that the connection between the push rod assembly 11, the front foot support assembly and the rear foot support assembly is simpler, which can reduce manufacturing costs and reduce the weight of the entire vehicle.

[0057] As shown in Figures 10-16, the stroller frame also includes a seat assembly 3, which includes a seat support 31 and a seat rod 32. The seat support 31 is located below the sliding sleeve 143 and is rotatably connected to the lower portion of the push rod assembly 11. The seat rod 32 is slidably connected to the seat support 3 and can drive the seat support 3 to rotate relative to the push rod assembly 11. The rear end of the seat rod 32 is connected to the middle portion of the power rod 142. When in use, the seat assembly is connected to a soft seat cloth. When the entire stroller is folded, it can be folded together without removal, making it more convenient for users.

[0058] As shown in Figures 10-15, as a preferred embodiment of the push rod assembly 11 of the present application, the push rod assembly 11 includes a lower push rod 111 and an upper push rod 112, the upper end of the lower push rod 111 is connected to a lower joint block 1111, the lower end of the upper push rod 112 is connected to an upper joint block 1121 pivotally connected to the lower joint block 1111, a joint locking assembly 5 is provided between the lower joint block 1111 and the upper joint block 1121, and a joint unlocking assembly 6 for unlocking the joint locking assembly 5 is provided on the upper push rod 112; the frame locking assembly 15 also includes a frame unlocking linkage 153, the upper end of the frame unlocking linkage 153 is eccentrically connected to the upper joint block 1122, and the lower end of the frame unlocking linkage 153 is connected to the frame lock tongue 151.

[0059] As shown in Figures 4, 7 and 8, the joint locking assembly 5 includes a joint locking hole 51 and a joint locking pin 52. The joint locking hole 51 is eccentrically arranged on the lower joint block 1111, and the joint locking pin 52 is arranged on the upper joint block 1121 and can be elastically extended and inserted into the joint locking hole 51. The joint unlocking assembly 6 includes a joint unlocking linkage 61 and a joint unlocking switch 62. One end of the unlocking linkage 61 is connected to the joint locking pin 52, and the outer end of the push rod folding rod 1123 extends forward to form a handle 1124. The other end of the unlocking linkage 61 is connected to the joint unlocking switch 62 provided on the handle 1124.

[0060] When folding, as shown in Figures 10 and 11, the joint unlocking switch 62 is first actuated, and the lower end of the unlocking linkage 61 pulls the joint locking pin 52 elastically back into the upper joint block 1121 and disengages from the joint locking hole 51. At this time, the upper push rod 112 can be folded forward relative to the lower push rod 111, and when the upper push rod 112 is folded forward relative to the lower push rod 111 and rotated to a preset angle, the lower end of the frame unlocking linkage 153 eccentrically connected to the upper joint block 1121 is pulled, and the frame locking tongue 151 is correspondingly released. The sliding sleeve 143 is then elastically withdrawn from the frame lock hole 152 on the sliding sleeve 143. At this time, the sliding sleeve 143 is unlocked, the lower push rod 111 is folded backward and close to the rear foot support assembly 13, the sliding sleeve 143 and the power rod 142 slide along the lower push rod 111 toward the lower joint block 1111, and the rear end of the power rod 142 rotates around the pivot shaft connected to the rear foot support assembly in the middle of the power rod, and also rotates relative to the sliding sleeve 143. The front end of the power rod 142 is tilted upward and pulls the rear end of the front linkage rod 141, so that The front foot support assembly is folded toward the rear foot support assembly; at the same time, the rear end of the seat rod 32 drives the seat support 31 to rotate relative to the lower push rod 11 during the rotation of the power rod around the pivot axis connected to the rear foot support assembly in the middle, and the seat rod 32 also slides relative to the seat support 31, so that the seat rod is folded to be parallel to the rear foot support assembly, and the entire vehicle frame is folded to the first folded state, as shown in Figure 16; at this time, all the cross braces are staggered and parallel up and down and located on the same plane, and the pivot axes of the folding structure on the same side are collinear and parallel to the axis of the rear foot support assembly, and the two handles 1124 are respectively located on the outside of the push rod assembly, the front foot support assembly and the rear foot support assembly; finally, the push rod assemblies, the front foot support assembly and the rear foot support assembly on both sides are folded toward each other, and the two handles 1124 and the cross brace 2 form a folding space 7 and clamp the push rod assembly 11, the front foot support assembly 12 and the rear foot support assembly 13 therein, to achieve the second folded state as shown in Figure 19.

[0061] As another embodiment of the push rod assembly 11 of the present application, the upper push rod 112 is telescopically connected to the upper push rod 112, and a telescopic control component for relative locking of the lower push rod 111 and the upper push rod 112 is provided between the lower push rod 111 and the upper push rod 112. The telescopic control component can adopt a spring bean or a frame locking component 15 between the sliding sleeve and the lower push rod 111 similar to the above embodiment. In order to facilitate the telescopic adjustment of the upper push rod 112 relative to the lower push rod 111, a plurality of adjustment positioning holes can be provided on the lower push rod 111; the upper push rod A trigger member is provided at the lower portion of 112. When the upper push rod is unlocked and retracted relative to the lower push rod to a certain extent, the trigger member at the lower end of the upper push rod presses against the frame locking tongue 151, elastically withdrawing it from the frame locking hole 152 on the sliding sleeve, thereby releasing the locked state of the sliding sleeve 143. To achieve the second folded state, the two handles 1124 and the cross brace 2 enclose the folding space 7, thereby clamping the push rod assembly 11, the front leg support assembly 12, and the rear leg support assembly 13 therein, the handles 1124 are formed by the rearward extension of the outer end of the push rod folding rod 1123 when in the deployed use state. When folding, except for the difference in the unlocking and retraction of the upper push rod 112 relative to the lower push rod 111 and the linked triggering of the frame locking tongue 151 to release the locked state of the sliding sleeve 143, the subsequent folding operation of this embodiment is the same as that of the preferred embodiment and will not be repeated here.

Claims

1. A baby carriage frame that can be folded twice. The baby carriage frame has a deployed state for use, a first folded state, and a second folded state, characterized in that The invention comprises a side support (1) and a plurality of cross braces (2) connected between the two side supports (1), each side support (1) comprising a push rod assembly (11), a front foot support assembly (12) and a rear foot support assembly (13) which are rotatably connected to each other, a linkage folding assembly (14) is provided between the push rod assembly (11), the front foot support assembly (12) and the rear foot support assembly (13) on the same side, and a frame locking assembly (15) is also provided on the side support (1) for locking the linkage folding assembly (14) so ​​that the baby carriage frame remains locked in the unfolded use state; after the frame locking assembly (15) is unlocked, the push rod assembly (11), the front foot support assembly (12) and the rear foot support assembly (13) are folded together under the linkage of the linkage folding assembly (14) and converted from the unfolded use state to the first folded state; The same side end of the cross brace (2) is provided with a folding structure (21) that allows the side bracket (1) to be folded relative to the cross brace (2); the pivot axes of at least two folding structures (21) on the same side are configured to have inconsistent folding directions when in an unfolded use state, thereby limiting the side bracket (1) from being folded relative to the cross brace (2); and the pivot axes of the folding structures (21) on the same side are configured to have consistent folding directions in a first folded state, thereby allowing the side bracket (1) to be folded a second time relative to the cross brace (2), thereby converting the first folded state into a second folded state.

2. The foldable baby carriage frame according to claim 1, wherein Both ends of each of the cross braces (2) are provided with a folding structure (21) that allows the side bracket (1) to be folded relative to the cross brace (2); the pivot axis of the folding structure (21) on the same side is configured to have a consistent folding direction in the first folded state, thereby allowing the two side brackets (1) to be turned toward each other relative to the cross brace (2) for a second folding; and the folding structure (21) is configured to only allow the side bracket (1) to be folded in one direction relative to the cross brace (2).

3. The foldable baby carriage frame according to claim 1, wherein At least two of the two front foot support assemblies (12), the two rear foot support assemblies (13), the two linked folding assemblies (14) and the two push rod assemblies (11) are provided with a cross brace (2), and all the cross braces (2) are correspondingly turned over during the process of changing from the unfolded use state to the first folded state so that the pivot axes of all the folding structures (21) are parallel to each other and all the cross braces (2) are on the same plane.

4. The foldable baby carriage frame according to claim 1, wherein The upper part of the push rod assembly (11) is relatively fixedly connected to a push rod folding rod (1123), and the ends of the two push rod folding rods (1123) are correspondingly connected to the two ends of the cross brace (2) through a folding structure (21). The outer end of the push rod folding rod (1123) is connected to a handle (1124), and the handle (1124) is configured to clamp the front foot support assembly (12) and the rear foot support assembly (13) in a folding space (7) surrounded by the handle (1124) and the cross brace (2) in the second folding state.

5. A foldable stroller frame that can be folded twice according to any one of claims 1-4, characterized in that The linkage folding assembly (14) includes a front linkage rod (141) and a power rod (142). The front end of the front linkage rod (141) is pivotally connected to the front foot support assembly (12). The rear end of the front linkage rod (141) is pivotally connected to the front end of the power rod (142). The middle of the power rod (142) is pivotally connected to the rear foot support assembly (13). A sliding sleeve (143) is pivotally connected to the rear end of the power rod (142), and the sliding sleeve (143) is slidably connected to the push rod assembly (11) and can be locked and unlocked by the frame locking assembly (15).

6. The foldable baby carriage frame according to claim 5, characterized in that The frame locking assembly (15) includes a frame locking tongue (151) elastically and telescopically arranged at the lower part of the push rod assembly (11), and a frame locking hole (152) provided on the sliding sleeve (143) for the frame locking tongue (151) to insert. The frame locking tongue (151) is configured to be actuated to release the locking state of the sliding sleeve (143) when the unfolded use state is to be converted into the first folding state.

7. The foldable baby carriage frame according to claim 5, wherein It further includes a seat assembly (3). The seat assembly (3) includes a seat support (31) and a seat rod (32). The seat support (31) is located below the sliding sleeve (143) and is rotatably connected to the lower part of the push rod assembly (11). The seat rod (32) is slidably connected to the seat support (3) and can drive the seat support (3) to rotate relative to the push rod assembly (11). The rear end of the seat rod (32) is connected to the middle of the power rod (142).

8. The foldable stroller frame according to claim 6, wherein The push rod assembly (11) includes a lower push rod (111) and an upper push rod (112). The upper end of the lower push rod (111) is connected with a lower joint block (1111). The lower end of the upper push rod (112) is connected with an upper joint block (1121) pivotally connected to the lower joint block (1111). A joint locking assembly (5) is provided between the lower joint block (1111) and the upper joint block (1121). An joint unlocking assembly (6) for unlocking the joint locking assembly (5) is provided on the upper push rod (112). The frame locking assembly (15) further includes a frame unlocking linkage (153). The upper end of the frame unlocking linkage (153) is eccentrically connected to the upper joint block (1122), and the lower end of the frame unlocking linkage (153) is connected to the frame locking tongue (151). Relatively fixed to the upper part of the upper push rod (112) is a push rod folding rod (1123). The ends of the two push rod folding rods (1123) are respectively connected to the two ends of the cross brace (2) through a folding structure (21).

9. The foldable baby carriage frame according to claim 8, wherein The joint locking assembly (5) includes a joint lock hole (51) and a joint locking pin (52). The joint lock hole (51) is eccentrically provided on the lower joint block (1111), and the joint locking pin (52) is provided on the upper joint block (1121) and can elastically extend to insert into the joint lock hole (51). The joint unlocking assembly (6) includes a joint unlocking linkage (61) and a joint unlocking switch (62). One end of the unlocking linkage (61) is connected to the joint locking pin (52), the outer end of the push rod folding rod (1123) extends forward to form a handle (1124), and the other end of the unlocking linkage (61) is connected to the joint unlocking switch (62) provided on the handle (1124).

10. The foldable baby carriage frame according to claim 8, characterized in that The folding structure (21) includes a connecting groove (211) provided at the end of the push rod folding rod (1123) and a connecting tenon (212) provided at the end of the cross brace (2). The connecting tenon (212) extends into the connecting groove (211) for pivotal connection therebetween. A limiting portion (213) is formed at the root of the tenon (212) and the end side of the connecting groove (211) to limit the push rod folding rod (1123) from folding relative to the cross brace (2) in the opposite direction of normal folding and unfolding during use.

11. The foldable baby carriage frame according to claim 5, characterized in that The middle portions of the two power rods (142) are relatively fixedly connected with a middle folding rod (144) extending forward, and the ends of the two middle folding rods (144) are correspondingly connected to both ends of the cross brace (2) through the folding structure (21).

12. The foldable baby carriage frame according to claim 6, characterized in that The push rod assembly (11) includes a lower push rod (111) and an upper push rod (112). The upper push rod (112) is telescopically connected to the upper push rod (112). A telescopic control component for relatively locking the lower push rod (111) and the upper push rod (112) is provided between the lower push rod (111) and the upper push rod (112). A triggering member for triggering the unlocking of the sliding sleeve (143) by the vehicle frame locking tongue (151) is provided at the lower part of the upper push rod (112). The upper part of the upper push rod (112) is relatively fixedly connected with a push rod folding rod (1123). The ends of the two push rod folding rods (1123) are correspondingly connected to both ends of the cross brace (2) through the folding structure (21), and the outer end of the push rod folding rod (1123) extends backward to form a handle (1124).

13. The foldable baby carriage frame according to claim 3, wherein The lower part of each front foot support assembly (12) is relatively fixedly connected with a front foot folding rod (121) extending inward and downward obliquely. The ends of the two front foot folding rods (121) are correspondingly connected to both ends of the cross brace (2) through the folding structure (21); the lower part of the rear foot support assembly (13) is relatively fixedly connected with a rear foot folding rod (131) extending backward and upward obliquely. The ends of the two rear foot folding rods (131) are correspondingly connected to both ends of the cross brace (2) through the folding structure (21). The rear foot folding rod (131) and the front foot folding rod (121) are configured to be vertically staggered and parallel to each other in the first folding state.

14. The foldable baby carriage frame according to claim 12, wherein The folding structure (21) is a connecting groove (211) provided at the end of the cross brace (2). The ends of the front foot folding rod (121) and the rear foot folding rod (131) are respectively formed with connecting tenons (212) which extend into the connecting groove (211) and are pivotally connected to each other. The bottom of the connecting groove (211) is inclined along the direction of the end of the cross brace (2) to form a limiting portion (213). The limiting portion (213) restricts the front foot folding rod (121) and the rear foot folding rod (131) from folding in the opposite direction of the normal folding relative to the corresponding cross brace (2).

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