Seat frame capable of being automatically folded and baby carriage

Abstract

In the folding process, a user only needs to operate a seat frame folding unlocking mechanism to be in linkage with a seat frame locking mechanism to release the locking state of the seat frame, and then the seat part can be in linkage with the seat part to move backwards in the process of operating a backrest part to turn towards one side of the seat part to be folded. The folded seat frame is more compact in structure, the size is minimized, the carrying and storage requirements of a user are met, and operation is easy and convenient. In addition, the backrest part and the seat part can be linked with the seat part to automatically adjust the folding angle in the folding process of the backrest part through the seat frame linkage assembly.

Description

Technical field

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

[0002] Many children's strollers on the market include a foldable stroller frame and a foldable seat frame connected to the stroller frame. Current foldable seat frames have the following drawbacks: the seat frame has a complex structure, is inconvenient to fold, occupies a large space when folded, and is not compact enough, making the folded seat frame inconvenient to carry and store. Furthermore, current seat frames require two or more unlocking operations when folding, resulting in complex operation and a complicated structure.

[0003] In addition, some foldable seat frames that are detachably connected to the frame of a children's stroller usually have a folding locking mechanism and a disassembly locking mechanism that are independent of each other, that is, the user needs to operate the folding unlocking mechanism and the disassembly unlocking mechanism respectively to achieve folding and disassembly, which results in numerous operating steps and inconvenience in use.

[0004] For this reason, the present invention is studied and proposed in view of the above problems. [Utility Model Content]

[0005] The purpose of the present utility model is to overcome the deficiencies of the prior art and to provide a seat frame and a baby carriage that can be folded automatically. During the folding process, the user only needs to operate the seat frame folding unlocking mechanism to link the seat frame locking mechanism to release the locked state of the seat frame, and then operate the backrest to flip forward to the side of the seat portion to link the seat portion to move backward during the folding process, so that the folded seat frame structure is more compact and the volume is minimized, meeting the user's carrying and storage requirements, and the operation is simple and convenient. In addition, the seat frame linkage assembly is used between the backrest and the seat portion to realize the function of automatically adjusting the folding angle of the seat portion during the folding process of the backrest.

[0006] In order to solve the above technical problems, the present invention provides an automatically foldable seat frame, which can be switched between an unfolded state and a folded state, comprising:

[0007] Seat section 1;

[0008] A backrest portion 2, wherein the lower end of the backrest portion 2 is rotatably connected to the rear end of the seat portion 1 via a pivot axis A;

[0009] A seat frame linkage assembly 3, one end of which is rotatably connected to the middle or rear portion of the seat portion 1, and the other end of which is rotatably connected to the lower portion of the backrest portion 2 via a pivot axis B, wherein the pivot axis B is located above the pivot axis A and is offset therefrom. The seat frame linkage assembly 3 is configured to simultaneously link the seat portion 1 to move backward when the backrest portion 2 is folded forward and brought closer to the seat portion 1;

[0010] A seat frame locking mechanism 4, located on the seat frame and used to lock the seat frame in the deployed state;

[0011] The seat frame folding and unlocking mechanism 5 is located on the seat frame and is used to link the seat frame locking mechanism 4 to release the locked state of the seat frame so that the seat frame can be switched from the unfolded use state to the folded use state.

[0012] As described above, a seat frame that can be automatically folded, the seat frame linkage assembly 3 includes a seat link 31 and an armrest link 32, the lower end of the seat link 31 is rotatably connected to the middle part of the seat part 1, and the upper end of the seat link 31 is rotatably connected to the upper end of the armrest link 32; the middle part of the armrest link 32 is rotatably connected to the lower part of the backrest part 2 through a pivot axis B, and the lower end of the armrest link 32 can be used for detachable connection with the seat frame connector of the baby carriage frame.

[0013] As described above, a seat frame that can be automatically folded, the seat frame locking mechanism 4 is located between the armrest connecting rod 32 and the backrest portion 2, and is used to lock the backrest portion 2 relative to the armrest connecting rod 32; the seat frame locking mechanism 4 includes a seat frame locking portion provided on the armrest connecting rod 32 and a seat frame locking member movably provided on the backrest portion 2 and used to lock with the seat frame locking portion, and a seat frame locking elastic member is provided between the seat frame locking member and the backrest portion 2 for keeping the seat frame locking member locked with the seat frame locking portion; the seat frame locking member is configured to be linked to its unlocking action by the seat frame folding unlocking mechanism 5.

[0014] As described above, a seat frame that can be automatically folded, the seat frame folding and unlocking mechanism 5 is located on the backrest portion 2; the seat frame folding and unlocking mechanism 5 includes a seat frame folding and unlocking member movably arranged on the backrest portion 2 and a seat frame folding and unlocking linkage member arranged on the backrest portion 2, one end of the seat frame folding and unlocking linkage member is connected to the seat frame folding and unlocking member, and the other end is connected to the seat frame locking member.

[0015] As described above, a seat frame that can be automatically folded is provided between the armrest connecting rod 32 and the backrest 2, and a backrest guide mechanism 6 is provided for guiding the flipping path of the backrest 2. The backrest guide mechanism 6 includes a backrest guide arc groove 61 provided on the armrest connecting rod 32 or the backrest 2 and a backrest guide block 62 correspondingly provided on the backrest 2 or the armrest connecting rod 32 and guiding and cooperating with the backrest guide arc groove 61.

[0016] As described above, a seat frame that can be automatically folded is provided with a seat frame connection locking mechanism 7 at the lower end of the armrest link 32 for locking the armrest link 32 relative to the seat frame connector of the baby carriage frame, and a seat frame connection unlocking mechanism 73 is provided between the armrest link 32 and the backrest portion 2 for linking the unlocking action of the seat frame connection locking mechanism 7 when the backrest portion 2 is flipped forward to a preset angle relative to the armrest link 32.

[0017] In the automatically foldable seat frame as described above, the seat frame connection unlocking mechanism 73 is further configured to cancel the unlocking action of the seat frame connection locking mechanism 7 when the backrest portion 2 continues to flip forward relative to the armrest connecting rod 32.

[0018] As described above, a seat frame that can be automatically folded, the seat frame connection locking mechanism 7 includes a seat frame connection locking piece 71 that is movably arranged at the lower end of the armrest link 32 and is used to lock and cooperate with the seat frame connection locking part of the seat frame connector, and a seat frame connection locking elastic piece 72 is provided between the seat frame connection locking piece 71 and the armrest link 32 for keeping the seat frame connection locking piece 71 locked and cooperated with the seat frame connection locking part; the seat frame connection locking piece 71 is configured to be linked to its unlocking action by the seat frame connection unlocking mechanism 73.

[0019] As described above, a seat frame that can be automatically folded, the seat frame connection locking member 71 is a seat frame connection locking hook whose upper end is rotatably connected to the armrest connecting rod 32 and is used to engage with the seat frame connection locking part, and the seat frame connection locking elastic member 72 is a seat frame connection locking torsion spring provided between the seat frame connection locking hook and the armrest connecting rod 32, one end of the seat frame connection locking torsion spring abuts against the armrest connecting rod 32, and the other end abuts against the seat frame connection locking hook.

[0020] As described above, the automatically foldable seat frame includes a seat frame connection unlocking mechanism 73 which is provided on the backrest portion 2 and is used to link the unlocking action of the seat frame connection locking member 71 when the backrest portion 2 is flipped forward to a preset angle relative to the armrest connecting rod 32.

[0021] As described above, an automatically foldable seat frame also includes an armrest assembly 8, wherein the corresponding end of the armrest assembly 8 is rotatably connected to the upper end of the armrest link 32, and an armrest locking mechanism 9 for locking the armrest assembly 8 relative to the armrest link 32 is provided between the end of the armrest assembly 8 and the upper end of the armrest link 32, and an armrest folding unlocking mechanism 94 is provided between the upper end of the armrest link 32 and the upper end of the seat link 31 for linking the unlocking action of the armrest locking mechanism 9 when the seat link 31 is rotated and folded to a preset angle relative to the armrest link 32.

[0022] As described above, a seat frame that can be automatically folded, the armrest locking mechanism 9 includes an armrest locking hole 91 provided at the upper end of the armrest connecting rod 32 and an armrest locking sliding seat 92 that can be axially slidably provided on the end of the armrest assembly 8, the armrest locking sliding seat 92 is provided with an armrest locking pin 921 that can be inserted into the armrest locking hole 91, and an armrest locking elastic member 93 for driving the armrest locking sliding seat 92 to elastically reset is provided between the armrest locking sliding seat 92 and the end of the armrest assembly 8; the armrest locking sliding seat 92 is configured to be linked to its unlocking action by the armrest folding unlocking mechanism 94.

[0023] As described above, a seat frame that can be automatically folded, the armrest folding and unlocking mechanism 94 includes an armrest folding and unlocking sliding seat 941 that can be axially slidably arranged between the upper end of the seat link 31 and the upper end of the armrest link 32, and the armrest folding and unlocking sliding seat 941 is provided with an armrest folding and unlocking pushing pin 942 that can be used to push the armrest locking pin 921 out of the armrest locking hole 91; the armrest folding and unlocking mechanism 94 also includes an armrest folding and unlocking driving member 943 that is arranged at the upper end of the seat link 31 and is used to drive the armrest folding and unlocking sliding seat 941 to slide axially accordingly when the seat link 31 is rotated and folded to a preset angle relative to the armrest link 32.

[0024] As described above, in the automatically foldable seat frame, the armrest assembly 8 is in a U-shaped structure. When the armrest assembly 8 is in the folded state, the middle portion of the armrest assembly 8 rests against the front edge of the seat portion 1 or is located between the seat portion 1 and the backrest 2.

[0025] The present invention further provides a baby carriage, comprising a baby carriage frame 100 , wherein the baby carriage frame 100 is provided with a seat frame connector 110 , and the seat frame connector 110 is connected to the seat frame.

[0026] Compared with the prior art, the utility model has the following advantages:

[0027] 1. During the folding process of the seat frame of the utility model, the user only needs to operate the seat frame folding unlocking mechanism to link the seat frame locking mechanism to release the locked state of the seat frame, and then operate the backrest to flip forward to the side of the seat part to link the seat part to move backward during the folding process, so that the folded seat frame structure is more compact and the volume is minimized, which meets the user's carrying and storage requirements and is simple and convenient to operate. In addition, the seat frame linkage component is used between the backrest and the seat part to realize the function of automatically adjusting the folding angle of the seat part during the folding process of the backrest.

[0028] 2. In order to ensure that the backrest is linked to the seat smoothly and stably, the seat, seat connecting rod, armrest connecting rod and backrest are connected to form a four-bar connection mechanism.

[0029] 3. In order to ensure that the backrest can be smoothly flipped, folded or unfolded, a backrest guide mechanism is provided between the armrest connecting rod and the backrest to guide the flipping path of the backrest.

[0030] 4. When the backrest is in the unfolded state, the backrest guide block abuts against the corresponding end wall of the backrest guide arc groove, which can ensure that the backrest is stable and reliable in the unfolded state. At the same time, it can also ensure that the seat frame locking piece is accurately aligned with the seat frame locking part, which facilitates smooth locking.

[0031] 5. A seat frame connection unlocking mechanism is provided between the armrest connecting rod and the backrest, which is linked to the unlocking action of the seat frame connection locking mechanism when the backrest is flipped forward to a preset angle relative to the armrest connecting rod. The user only needs to operate the backrest to rotate and fold to link the seat frame connection locking mechanism to release the locking state between the lower end of the armrest connecting rod and the seat frame connector. The user does not need to manually unlock it, and the unlocking operation is convenient.

[0032] 6. The utility model configures the seat frame connection unlocking mechanism to link the unlocking action of the seat frame connection locking mechanism when the backrest is flipped forward to a preset angle relative to the armrest connecting rod. At the same time, the seat frame connection unlocking mechanism is also configured to cancel the unlocking action of the seat frame connection locking mechanism when the backrest continues to flip forward relative to the armrest connecting rod. The seat frame can be disassembled from the baby stroller frame according to usage requirements, and the seat frame can be firmly connected to the baby stroller frame when it does not need to be disassembled, avoiding the seat frame in the folded use state from being separated from the baby stroller frame, resulting in inconvenience in subsequent transportation and storage, and the seat frame adapting to the frame angle when folded. The design is reasonable.

[0033] 7. In order to facilitate the folding operation of the armrest assembly, an armrest folding unlocking mechanism is provided between the upper end of the armrest connecting rod and the upper end of the seat connecting rod, which is linked to the unlocking action of the armrest locking mechanism when the seat connecting rod is rotated and folded to a preset angle relative to the armrest connecting rod.

Brief Description of the Drawings

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

[0035] Figure 1 It is a three-dimensional schematic diagram of the utility model in the unfolded use state.

[0036] Figure 2 It is a three-dimensional schematic diagram of the utility model in a folded and used state.

[0037] Figure 3 This is one of the exploded views of the present invention.

[0038] Figure 4 This is the second exploded view of the present invention.

[0039] Figure 5 This is a three-dimensional schematic diagram of the seat frame of the utility model when connected to the baby carriage frame.

[0040] Figure 6 The figure is a side view of the seat frame of the utility model when connected to the baby carriage frame. [Specific implementation method]

[0041] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0042] like Figure 1-4 As shown, the present invention provides an automatically foldable seat frame, which can be switched between an expanded use state and a folded use state, and includes a seat portion 1, a backrest portion 2, a seat frame linkage assembly 3, a seat frame locking mechanism 4, and a seat frame folding unlocking mechanism 5. The lower end of the backrest portion 2 is rotatably connected to the rear end of the seat portion 1 via a pivot axis A; one end of the seat frame linkage assembly 3 is rotatably connected to the middle or rear portion of the seat portion 1, and the other end of the seat frame linkage assembly 3 is rotatably connected to the lower portion of the backrest portion 2 via a pivot axis B, and the pivot axis B is located above the pivot axis A and offset from the pivot axis A; the seat frame linkage assembly 3 is configured to simultaneously link the seat portion 1 to move backward when the backrest portion 2 is folded forward and close to the seat portion 1; the seat frame locking mechanism 4 is located on the seat frame and is used to lock the seat frame in the expanded use state; the seat frame folding unlocking mechanism 5 is located on the seat frame and is used to link the seat frame locking mechanism 4 to release the seat frame from the locked state, so that the seat frame can be switched from the expanded use state to the folded use state. When the seat frame of the utility model is folded, the user only needs to operate the seat frame folding unlocking mechanism to link the seat frame locking mechanism to release the locked state of the seat frame, and then operate the backrest to flip forward to the side of the seat part to link the seat part to move backward during the folding process, so that the structure of the folded seat frame is more compact and the volume is minimized, which meets the user's carrying and storage requirements and is simple and convenient to operate. In addition, the seat frame linkage component is used between the backrest and the seat part to realize the function of automatically adjusting the folding angle of the seat part during the folding process of the backrest.

[0043] In the present invention, the seat frame is detachably connected to the seat frame connector 110 of the baby carriage frame 100 via the seat frame linkage assembly 3 .

[0044] like Figure 1-4As shown, to ensure smooth and stable linkage between the backrest and the seat, the seat frame linkage assembly 3 includes a seat link 31 and an armrest link 32. The lower end of the seat link 31 is rotatably connected to the middle portion of the seat 1, and the upper end of the seat link 31 is rotatably connected to the upper end of the armrest link 32. The middle portion of the armrest link 32 is rotatably connected to the lower portion of the backrest 2 via a pivot axis B, and the lower end of the armrest link 32 can be detachably connected to the seat frame connector of the stroller frame. During the folding process, the backrest is operated to tilt forward about the pivot axis B between the lower portion of the backrest 2 and the middle portion of the armrest link 32. During this folding process, the lower end of the backrest drives the seat 1 backward, causing the two to move toward each other. Simultaneously, the seat 1 drives the seat link 31 backward and toward the armrest link 32, making folding convenient.

[0045] To more reliably lock the seat frame in the deployed position, the seat frame locking mechanism 4 is located between the armrest connecting rod 32 and the backrest 2, and is used to lock the backrest 2 relative to the armrest connecting rod 32. The seat frame locking mechanism 4 includes a seat frame locking portion provided on the armrest connecting rod 32 and a seat frame locking member movably provided on the backrest 2 and configured to engage with the seat frame locking portion. A seat frame locking elastic member is provided between the seat frame locking member and the backrest 2 to maintain the seat frame locking member in engagement with the seat frame locking portion. The seat frame locking member is configured to be unlocked in conjunction with the seat frame folding unlocking mechanism 5. In this embodiment, the seat frame locking portion can be a seat frame locking hole, and the seat frame locking member can be a seat frame locking pin that engages with the seat frame locking hole (not shown in the figure). Among them, a plurality of seat frame locking holes are arranged on the armrest connecting rod at circumferential intervals. By inserting the seat frame locking pin into the corresponding seat frame locking hole, the inclination angle of the backrest 2 relative to the armrest connecting rod 32 can be adjusted to meet the riding needs of different children and improve the riding comfort.

[0046] To facilitate linked unlocking, the seat folding unlocking mechanism 5 is located on the backrest 2. The seat folding unlocking mechanism 5 comprises a seat folding unlocking member movably disposed on the backrest 2 and a seat folding unlocking linkage member disposed on the backrest 2. One end of the seat folding unlocking linkage member is connected to the seat folding unlocking member, and the other end is connected to the seat locking member. In this embodiment, the seat folding unlocking member is a seat folding unlocking wrench slidably disposed on the rear surface of the backrest 2, and the seat folding unlocking linkage member is a seat folding unlocking cable / pull cord connecting the seat folding unlocking member and the seat locking member. To facilitate reset, a seat folding unlocking elastic member is disposed between the seat folding unlocking member and the backrest 2 to elastically reset the seat folding unlocking member. In other words, the seat folding unlocking member is reset in a linked manner by the seat locking elastic member, through the seat locking member and the seat folding unlocking linkage member, simplifying the structure and reducing manufacturing costs. When unlocking, the user operates the seat frame folding unlocking wrench to slide upward relative to the backrest portion 2, and the seat frame folding unlocking wrench pulls the seat frame locking pin relative to the backrest portion to slide toward the side away from the seat frame locking hole through the seat frame folding unlocking steel rope / pull rope, so that the locking end of the seat frame locking pin exits the seat frame locking hole and releases the locking state of the backrest portion 2 relative to the armrest connecting rod 32.

[0047] like Figure 3 、 4 As shown, to ensure smooth folding or unfolding of the backrest, a backrest guide mechanism 6 is provided between the armrest connecting rod 32 and the backrest 2 to guide the folding path of the backrest 2. The backrest guide mechanism 6 includes a backrest guide arcuate groove 61 provided on the armrest connecting rod 32 or the backrest 2, and a backrest guide block 62 correspondingly provided on the backrest 2 or the armrest connecting rod 32 and cooperating with the backrest guide arcuate groove 61. In this embodiment, the center of the circle in which the backrest guide arcuate groove 61 is located is located on the pivot axis B. When the backrest is in the unfolded state, the backrest guide block abuts and cooperates with the corresponding end wall of the backrest guide arcuate groove, ensuring the stability and reliability of the backrest in the unfolded state. This also ensures that the seat frame locking member is accurately aligned with the seat frame locking portion, facilitating smooth locking.

[0048] like Figure 3 、 4As shown, in order to securely connect the seat frame to the stroller frame and facilitate unlocking, a seat frame connection locking mechanism 7 is provided at the lower end of the armrest link 32 for locking the armrest link 32 relative to the seat frame connector of the stroller frame. A seat frame connection unlocking mechanism 73 is provided between the armrest link 32 and the backrest 2 for unlocking the seat frame connection locking mechanism 7 when the backrest 2 is tilted forward to a preset angle relative to the armrest link 32. Therefore, the user only needs to rotate and fold the backrest to activate the seat frame connection locking mechanism to release the lock between the lower end of the armrest link and the seat frame connector, eliminating the need for additional manual unlocking by the user, resulting in a convenient unlocking operation. In this embodiment, when the backrest is tilted forward and close to perpendicular to the support surface, the seat frame connection unlocking mechanism 73 activates the unlocking action of the seat frame connection locking mechanism 7. At this point, the user can remove the seat frame from the stroller frame by lifting the backrest, achieving the functional feature of single-handed folding and detachment.

[0049] Furthermore, the seat frame connection unlocking mechanism 73 is also configured to cancel the unlocking action of the seat frame connection locking mechanism 7 when the backrest 2 continues to flip forward relative to the armrest connecting rod 32. The seat frame can be removed from the stroller frame according to usage requirements, and the seat frame can be firmly connected to the stroller frame when it does not need to be removed, avoiding the problem of separation of the seat frame and the stroller frame in the folded use state, resulting in inconvenience in subsequent transportation and storage. The design is reasonable.

[0050] like Figure 3 、 4 As shown, in order to reliably lock the armrest link relative to the seat frame connector, the seat frame connection locking mechanism 7 includes a seat frame connection locking member 71 movably provided at the lower end of the armrest link 32 and used for locking and cooperating with the seat frame connection locking portion of the seat frame connector, and a seat frame connection locking elastic member 72 is provided between the seat frame connection locking member 71 and the armrest link 32 for keeping the seat frame connection locking member 71 locked and cooperating with the seat frame connection locking portion; the seat frame connection locking member 71 is configured to be linked to its unlocking action by the seat frame connection unlocking mechanism 73.

[0051] like Figure 3 、 4 As shown, in order to reliably lock the armrest link relative to the seat frame connector, the seat frame connection locking member 71 is a seat frame connection locking hook whose upper end is rotatably connected to the armrest link 32 and is used to engage with the seat frame connection locking portion, and the seat frame connection locking elastic member 72 is a seat frame connection locking torsion spring provided between the seat frame connection locking hook and the armrest link 32, one end of the seat frame connection locking torsion spring abuts against the armrest link 32, and the other end abuts against the seat frame connection locking hook.

[0052] like Figure 3 、 4As shown, for convenient unlocking, the seat connection unlocking mechanism 73 includes a seat connection unlocking member disposed on the backrest portion 2 and configured to activate the unlocking action of the seat connection locking member 71 when the backrest portion 2 is tilted forward to a predetermined angle relative to the armrest connecting rod 32. In this embodiment, the seat connection unlocking member is a seat connection unlocking projection disposed on the backrest portion 2. The seat connection unlocking projection is provided with a seat connection unlocking driving inclined surface configured to unlock with a raised seat connection unlocking boss on the middle portion of the seat connection locking member 71.

[0053] When the backrest is flipped forward to a preset angle, the seat frame connection unlocking driving inclined surface and the seat frame connection unlocking protrusion cooperate to drive the seat frame connection locking hook to flip around the pivot axis between the upper end of the seat frame connection locking hook and the armrest link 32, thereby separating the locking end of the seat frame connection locking hook from the seat frame connection locking portion (the seat frame connection locking portion can be a seat frame connection locking hole / recessed wall, etc.) to release the locked state of the armrest link and the seat frame connector, at this time the seat frame can be removed from the stroller frame; if the seat frame does not need to be removed, the backrest is operated to continue to flip forward so that the seat frame connection unlocking protrusion and the seat frame connection unlocking boss are misaligned, thereby making the seat frame connection unlocking driving inclined surface release the driving force on the seat frame connection unlocking protrusion, at this time the locking end of the seat frame connection locking hook remains locked with the seat frame connection locking portion under the elastic force of the seat frame connection locking torsion spring.

[0054] like Figure 1-4 As shown, in order to better link the armrest assembly to unlock and fold, it also includes an armrest assembly 8, the corresponding end of the armrest assembly 8 is rotatably connected to the upper end of the armrest link 32, and an armrest locking mechanism 9 for locking the armrest assembly 8 relative to the armrest link 32 is provided between the end of the armrest assembly 8 and the upper end of the armrest link 32, and an armrest folding unlocking mechanism 94 is provided between the upper end of the armrest link 32 and the upper end of the seat link 31 for linking the unlocking action of the armrest locking mechanism 9 when the seat link 31 is rotated and folded to a preset angle relative to the armrest link 32.

[0055] like Figure 1-4 As shown, in order to better lock the armrest assembly, the armrest locking mechanism 9 includes an armrest locking hole 91 provided at the upper end of the armrest connecting rod 32 and an armrest locking sliding seat 92 axially slidably provided on the end of the armrest assembly 8, and the armrest locking sliding seat 92 is provided with an armrest locking pin 921 which can be inserted into the armrest locking hole 91, and an armrest locking elastic member 93 for driving the armrest locking sliding seat 92 to elastically reset is provided between the armrest locking sliding seat 92 and the end of the armrest assembly 8; the armrest locking sliding seat 92 is configured to be linked to its unlocking action by the armrest folding unlocking mechanism 94.

[0056] like Figure 1-4As shown, in order to better link the unlocking of the armrest assembly, the armrest folding unlocking mechanism 94 includes an armrest folding unlocking sliding seat 941 which can be axially slidably arranged between the upper end of the seat link 31 and the upper end of the armrest link 32, and the armrest folding unlocking sliding seat 941 is provided with an armrest folding unlocking pushing pin 942 which can be used to push the armrest locking pin 921 out of the armrest locking hole 91; the armrest folding unlocking mechanism 94 also includes an armrest folding unlocking driving member 943 which is arranged at the upper end of the seat link 31 and is used to drive the armrest folding unlocking sliding seat 941 to slide axially accordingly when the seat link 31 is rotated and folded to a preset angle relative to the armrest link 32. When the seat connecting rod 31 is rotated and folded relative to the armrest connecting rod 32, the seat connecting rod 31 drives the armrest folding unlocking sliding seat 941 to drive the armrest folding unlocking pushing pin 942 to slide toward the side of the armrest connecting rod 32 through the armrest folding unlocking driving member 943. The armrest folding unlocking pushing pin 942 pushes the armrest locking pin 921 to drive the armrest locking sliding seat 92 to slide toward the side of the armrest assembly 8 until the armrest locking pin 921 exits the armrest locking hole 91, thereby releasing the locking state of the armrest assembly relative to the armrest connecting rod; then, when the backrest is flipped forward and folded, the backrest pushes the armrest assembly to rotate and fold accordingly until the armrest assembly is folded between the seat part and the backrest.

[0057] like Figure 3 、 4 As shown, the armrest folding unlocking drive member 943 is an armrest folding unlocking drive protrusion located at the upper end of the seat link 31. This protrusion has a driving arc / inclined surface. The armrest folding unlocking sliding seat 941 has an armrest folding unlocking drive cavity with a driving arc / inclined surface on its side facing the seat link 31, which is adapted to cooperate with the armrest folding unlocking drive protrusion. When the seat frame is in the deployed position, the armrest folding unlocking drive protrusion is located inside the armrest folding unlocking drive cavity, making the structure between the seat link and the armrest link more compact.

[0058] like Figure 1 、 3 As shown in Figures 4 and 5, the armrest assembly 8 has a U-shaped structure. When the armrest assembly 8 is folded, the middle portion of the armrest assembly 8 abuts against the front edge of the seat portion 1. This prevents the armrest assembly from interfering with the backrest and seat portion from moving closer together, ensuring that the backrest and seat portion fit closely together. This makes the seat frame structure more compact and minimizes its volume after folding. Furthermore, the front edge of the seat portion 1 has a receiving recess for accommodating the middle portion of the armrest assembly 8. When the middle portion of the armrest assembly 8 is located in the receiving recess, the upper side of the armrest assembly is no higher than the upper surface of the seat portion.

[0059] In other embodiments, when the armrest assembly 8 is in the folded state, the middle portion of the armrest assembly 8 is located between the seat portion 1 and the backrest portion 2 .

[0060] like Figure 1-6 As shown, the present invention provides a baby carriage, comprising a baby carriage frame 100, wherein the baby carriage frame 100 is provided with a seat frame connector 110, and the seat frame is connected to the seat frame connector 110. The seat frame and the seat frame connector 110 are detachably connected.

Claims

1. An automatically foldable seat frame, which can be switched between an unfolded state and a folded state, characterized in that include: Seat section (1); A backrest portion (2), wherein the lower end of the backrest portion (2) is rotatably connected to the rear end of the seat portion (1) via a pivot axis A; A seat frame linkage assembly (3), one end of the seat frame linkage assembly (3) is rotatably connected to the middle or rear portion of the seat portion (1), and the other end of the seat frame linkage assembly (3) is rotatably connected to the lower portion of the backrest portion (2) via a pivot axis B, and the pivot axis B is located above the pivot axis A and is offset from the pivot axis A; the seat frame linkage assembly (3) is configured to simultaneously link the seat portion (1) to move backward when the backrest portion (2) is folded forward and brought closer to the seat portion (1); A seat frame locking mechanism (4), the seat frame locking mechanism (4) being located on the seat frame and being used to lock the seat frame in an unfolded use state; A seat frame folding and unlocking mechanism (5) is provided, wherein the seat frame folding and unlocking mechanism (5) is located on the seat frame and is used to link with the seat frame locking mechanism (4) to release the locked state of the seat frame so that the seat frame can be switched from an unfolded use state to a folded use state.

2. The automatically foldable seat frame according to claim 1, characterized in that The seat frame linkage assembly (3) includes a seat connecting rod (31) and an armrest connecting rod (32); The lower end of the seat connecting rod (31) is rotatably connected to the middle part of the seat part (1), and the upper end of the seat connecting rod (31) is rotatably connected to the upper end of the armrest connecting rod (32); The middle part of the armrest connecting rod (32) is rotatably connected to the lower part of the backrest (2) via a pivot shaft B, and the lower end of the armrest connecting rod (32) can be detachably connected to the seat frame connector of the baby carriage frame.

3. The automatically foldable seat frame according to claim 2, characterized in that The seat frame locking mechanism (4) is located between the armrest connecting rod (32) and the backrest (2) and is used to lock the backrest (2) relative to the armrest connecting rod (32); the seat frame locking mechanism (4) includes a seat frame locking portion provided on the armrest connecting rod (32) and a seat frame locking member movably provided on the backrest (2) and used to lock with the seat frame locking portion; a seat frame locking elastic member is provided between the seat frame locking member and the backrest (2) and is used to keep the seat frame locking member locked with the seat frame locking portion; the seat frame locking member is configured to be linked to its unlocking action by the seat frame folding unlocking mechanism (5).

4. The automatically foldable seat frame according to claim 3, characterized in that The seat frame folding and unlocking mechanism (5) is located on the backrest portion (2); the seat frame folding and unlocking mechanism (5) comprises a seat frame folding and unlocking member movably arranged on the backrest portion (2) and a seat frame folding and unlocking linkage member arranged on the backrest portion (2); one end of the seat frame folding and unlocking linkage member is connected to the seat frame folding and unlocking member, and the other end is connected to the seat frame locking member.

5. The automatically foldable seat frame according to claim 2, characterized in that A backrest guide mechanism (6) for guiding the turning path of the backrest (2) is provided between the armrest connecting rod (32) and the backrest (2). The backrest guide mechanism (6) comprises a backrest guide arc groove (61) provided on the armrest connecting rod (32) or the backrest (2) and a backrest guide block (62) provided on the backrest (2) or the armrest connecting rod (32) and correspondingly matched with the backrest guide arc groove (61).

6. The automatically foldable seat frame according to claim 2, characterized in that A seat frame connection locking mechanism (7) is provided at the lower end of the armrest connecting rod (32) for locking the armrest connecting rod (32) relative to the seat frame connector of the baby carriage frame, and a seat frame connection unlocking mechanism (73) is provided between the armrest connecting rod (32) and the backrest portion (2) for interlocking the seat frame connection locking mechanism (7) to unlock when the backrest portion (2) is flipped forward to a preset angle relative to the armrest connecting rod (32).

7. The automatically foldable seat frame according to claim 6, characterized in that The seat frame connection unlocking mechanism (73) is further configured to cancel the unlocking action of the seat frame connection locking mechanism (7) when the backrest portion (2) continues to flip forward relative to the armrest connecting rod (32).

8. The automatically foldable seat frame according to claim 6, characterized in that The seat frame connection locking mechanism (7) comprises a seat frame connection locking member (71) movably arranged at the lower end of the armrest connecting rod (32) and used for locking and cooperating with the seat frame connection locking portion of the seat frame connector; a seat frame connection locking elastic member (72) is provided between the seat frame connection locking member (71) and the armrest connecting rod (32) for keeping the seat frame connection locking member (71) locked and cooperating with the seat frame connection locking portion; the seat frame connection locking member (71) is configured to be linked to an unlocking action of the seat frame connection unlocking mechanism (73).

9. The automatically foldable seat frame according to claim 8, characterized in that The seat frame connection locking member (71) is a seat frame connection locking hook whose upper end is rotatably connected to the armrest connecting rod (32) and is used to engage with the seat frame connection locking portion. The seat frame connection locking elastic member (72) is a seat frame connection locking torsion spring provided between the seat frame connection locking hook and the armrest connecting rod (32). One end of the seat frame connection locking torsion spring abuts against the armrest connecting rod (32), and the other end abuts against the seat frame connection locking hook.

10. The automatically foldable seat frame according to claim 8, characterized in that The seat frame connection unlocking mechanism (73) comprises a seat frame connection unlocking member provided on the backrest portion (2) and used to link the unlocking action of the seat frame connection locking member (71) when the backrest portion (2) flips forward to a preset angle relative to the armrest connecting rod (32).

11. The automatically foldable seat frame according to any one of claims 2 to 10, characterized in that The invention also includes an armrest assembly (8), wherein the corresponding end of the armrest assembly (8) is rotatably connected to the upper end of the armrest link (32), an armrest locking mechanism (9) for locking the armrest assembly (8) relative to the armrest link (32) is provided between the end of the armrest assembly (8) and the upper end of the armrest link (32), and an armrest folding unlocking mechanism (94) for interlocking the armrest locking mechanism (9) to unlock when the seat link (31) is rotated and folded to a preset angle relative to the armrest link (32) is provided between the upper end of the armrest link (32) and the upper end of the seat link (31).

12. The automatically foldable seat frame according to claim 11, characterized in that The armrest locking mechanism (9) comprises an armrest locking hole (91) provided at the upper end of the armrest connecting rod (32) and an armrest locking sliding seat (92) axially slidably provided on the end of the armrest assembly (8); an armrest locking latch (921) which can be inserted into the armrest locking hole (91) is provided on the armrest locking sliding seat (92); an armrest locking elastic member (93) for driving the armrest locking sliding seat (92) to elastically reset is provided between the armrest locking sliding seat (92) and the end of the armrest assembly (8); the armrest locking sliding seat (92) is configured to be linked to an unlocking action by an armrest folding unlocking mechanism (94).

13. The automatically foldable seat frame according to claim 12, characterized in that The armrest folding and unlocking mechanism (94) includes an armrest folding and unlocking sliding seat (941) axially slidably arranged between the upper end of the seat connecting rod (31) and the upper end of the armrest connecting rod (32), and an armrest folding and unlocking pushing pin (942) for pushing the armrest locking pin (921) out of the armrest locking hole (91) is provided on the armrest folding and unlocking sliding seat (941); the armrest folding and unlocking mechanism (94) also includes an armrest folding and unlocking driving member (943) arranged at the upper end of the seat connecting rod (31) and used to drive the armrest folding and unlocking sliding seat (941) to slide axially accordingly when the seat connecting rod (31) is rotated and folded to a preset angle relative to the armrest connecting rod (32).

14. The automatically foldable seat frame according to claim 11, characterized in that The armrest assembly (8) has a U-shaped structure. When the armrest assembly (8) is in a folded state, the middle portion of the armrest assembly (8) abuts against the front edge of the seat portion (1) or is located between the seat portion (1) and the backrest portion (2).

15. A baby carriage, characterized in that The invention comprises a baby carriage frame (100), wherein a seat frame connector (110) is provided on the baby carriage frame (100), and the seat frame according to any one of claims 1 to 14 is connected to the seat frame connector (110).

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