Seat frame capable of being automatically folded and baby carriage

Abstract

According to the seat frame capable of being automatically folded and the baby carriage, 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 that a backrest part is operated to turn towards one side of the front 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 present invention relates to the technical field of baby carriages, in particular to an automatically foldable seat frame and a baby carriage. [Background technology]

[0002] Many baby strollers on the market include a foldable baby stroller frame and a foldable seat frame connected to the baby stroller frame. The current foldable seat frame has the following disadvantages: the seat frame has a complex structure, is inconvenient to fold, occupies a large space after folding, is not compact enough, and is not convenient to carry and store. Moreover, the current seat frame needs to be unlocked twice or multiple times when folding, and also has the problems of complex operation and complex structure.

[0003] In addition, some foldable seat frames are detachably connected to the frame of the child stroller, and the folding locking mechanism and the disassembly locking mechanism in the seat frame are usually 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 has the problems of numerous operating steps and inconvenience in use.

[0004] Therefore, the present invention is studied and proposed in view of the above problems. [Summary of the invention]

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a seat frame and a baby carriage that can be automatically folded. 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 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 assembly 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.

[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 use state and a folded use 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, and the pivot axis B is located above the pivot axis A and is offset from the arrangement; 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 close to the seat portion 1;

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

[0011] 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 locking 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 arranged on the armrest connecting rod 32 and a seat frame locking piece movably arranged on the backrest portion 2 and used to lock with the seat frame locking portion, and a seat frame locking elastic piece is provided between the seat frame locking piece and the backrest portion 2 for keeping the seat frame locking piece locked with the seat frame locking piece; the seat frame locking piece 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, in a seat frame that can be automatically folded, a backrest guide mechanism 6 is provided between the armrest connecting rod 32 and the backrest portion 2 for guiding the flipping path of the backrest portion 2, and the backrest guide mechanism 6 includes a backrest guide arc groove 61 provided on the armrest connecting rod 32 or the backrest portion 2 and a backrest guide block 62 correspondingly provided on the backrest portion 2 or the armrest connecting rod 32 and cooperating with the backrest guide arc groove 61 for guiding.

[0016] As described above, in a seat frame that can be automatically folded, the lower end of the armrest link 32 is provided with a seat frame connection locking mechanism 7 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 connecting rod 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 connecting rod 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 arranged 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, the seat frame connection unlocking mechanism 73 includes 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 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 connecting rod 32, and an armrest locking mechanism 9 for locking the armrest assembly 8 relative to the armrest connecting rod 32 is provided between the end of the armrest assembly 8 and the upper end of the armrest connecting rod 32, and an armrest folding unlocking mechanism 94 is provided between the upper end of the armrest connecting rod 32 and the upper end of the seat connecting rod 31, for linking the unlocking action of the armrest locking mechanism 9 when the seat connecting rod 31 is rotated and folded to a preset angle relative to the armrest connecting rod 32.

[0022] As described above, a seat frame that can be automatically folded, the armrest locking mechanism 9 includes an armrest locking hole 91 arranged at the upper end of the armrest connecting rod 32 and an armrest locking sliding seat 92 axially slidably arranged 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 return to its original position 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 connecting rod 31 and the upper end of the armrest connecting rod 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 on the upper end of the seat connecting rod 31 and is 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.

[0024] In the automatically foldable seat frame as described above, the armrest assembly 8 is in 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.

[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 present invention has the following advantages:

[0027] 1. During the folding process of the seat frame of the present invention, 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 assembly 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 make the backrest part smoothly and stably linked to the seat part, the seat part, the seat connecting rod, the armrest connecting rod and the backrest part are connected to form a four-link connection mechanism.

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

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

[0031] 5. A seat frame connection unlocking mechanism is provided between the armrest connecting rod and the backrest portion, which is linked to the unlocking action of the seat frame connection locking mechanism when the backrest portion is flipped forward to a preset angle relative to the armrest connecting rod. The user only needs to operate the backrest portion 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 perform additional manual unlocking operation, and the unlocking operation is convenient.

[0032] 6. The present invention 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 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, thereby avoiding the separation of the seat frame from the baby stroller frame in the folded use state, resulting in inconvenience in subsequent transportation and storage, and the seat frame adapting to the frame angle when folded, etc. 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 present invention in an unfolded use state.

[0036] Figure 2 It is a three-dimensional schematic diagram of the present invention in a folded use state.

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

[0038] Figure 4 This is the second explosion diagram of the present invention.

[0039] Figure 5It is a three-dimensional schematic diagram of the seat frame of the present invention when it is connected to the frame of the baby carriage.

[0040] Figure 6 The figure is a side view schematic diagram of the seat frame of the present invention when it is connected to the frame of the baby carriage. [Specific implementation method]

[0041] The embodiments of the present invention will be described in detail below 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 unfolded 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.

[0043] 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 is offset from the setting; 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 locking state of the seat frame so that the seat frame can be switched from the expanded use state to the folded use state. During the folding process of the seat frame of the present invention, 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 assembly 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.

[0044] 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 .

[0045] like Figure 1-4As shown, in order to make the backrest smoothly and stably linked with 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 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 of the armrest link 32 is rotatably connected to the lower part of the backrest 2 through a pivot axis B, and the lower end of the armrest link 32 can be used to be detachably connected to the seat frame connector of the baby carriage frame. During the folding process, the backrest is operated to flip forward around the pivot axis B between the lower part of the backrest 2 and the middle part of the armrest link 32. During the above-mentioned backrest flipping and folding process, the lower end of the backrest drives the seat 1 to move backward so that the two are folded together. At the same time, the seat 1 drives the seat link 31 to flip backward and fold toward the side of the armrest link 32, which is convenient for folding.

[0046] In order to more reliably lock the seat frame in the unfolded use state, 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, and a seat frame locking elastic member is provided between the seat frame locking member and the backrest 2 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. 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 locked with the seat frame locking hole, which is 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 portion 2 relative to the armrest connecting rod 32 can be adjusted to meet the riding needs of different children and improve the riding comfort.

[0047] In order to facilitate linkage unlocking, the seat frame folding unlocking mechanism 5 is located on the backrest 2; the seat frame folding unlocking mechanism 5 includes a seat frame folding unlocking member movably arranged on the backrest 2 and a seat frame folding unlocking linkage member arranged on the backrest 2, one end of the seat frame folding unlocking linkage member is connected to the seat frame folding unlocking member, and the other end is connected to the seat frame locking member. In this embodiment, the seat frame folding unlocking member is a seat frame folding unlocking wrench slidably arranged on the back of the backrest 2, and the seat frame folding unlocking linkage member is a seat frame folding unlocking steel rope / pull rope used to connect the seat frame folding unlocking member and the seat frame locking member. In order to facilitate resetting, a seat frame folding unlocking elastic member is provided between the seat frame folding unlocking member and the backrest 2 for driving the seat frame folding unlocking member to elastically reset. In other words, the seat frame folding unlocking member is reset by the seat frame locking elastic member through the seat frame locking member and the seat frame folding unlocking linkage member, which simplifies the structure and reduces the manufacturing cost. 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.

[0048] like Figure 3 , 4 As shown, in order to ensure that the backrest can be smoothly turned over and folded or turned over and unfolded, 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, and 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. In this embodiment, the center of the circle where the backrest guide arc groove 61 is located is located on the pivot axis B. Among them, when the backrest is in the unfolded use state, the backrest guide block abuts and cooperates with the corresponding end wall of the backrest guide arc groove, which can ensure that the backrest in the unfolded use state is stable and reliable, and also ensure that the seat frame locking member is accurately aligned and matched with the seat frame locking part, so as to facilitate smooth locking.

[0049] like Figure 3 , 4As shown, in order to firmly connect the seat frame to the baby carriage frame and facilitate unlocking, the lower end of the armrest link 32 is provided with a seat frame connection locking mechanism 7 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 2 for linking the unlocking action of the seat frame connection locking mechanism 7 when the backrest 2 is flipped forward to a preset angle relative to the armrest link 32. 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 link and the seat frame connector, and the user does not need to manually unlock it, and the unlocking operation is convenient. In this embodiment, when the backrest is flipped forward and close to the vertical support surface, the seat frame connection unlocking mechanism 73 links the unlocking action of the seat frame connection locking mechanism 7. At this time, the user removes the seat frame from the baby carriage frame by lifting the backrest, realizing the functional characteristics of one-handed folding and disassembly.

[0050] 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 portion 2 continues to flip forward relative to the armrest connecting rod 32. The seat frame can be removed from the baby carriage frame according to usage requirements, and the seat frame can be firmly connected to the baby carriage frame when it is not necessary to remove the seat frame, thereby avoiding the problem of separation of the seat frame from the baby carriage frame in the folded use state, resulting in inconvenience in subsequent transportation and storage. The design is reasonable.

[0051] like Figure 3 , 4 As shown, in order to reliably lock the armrest connecting rod relative to the seat frame connector, the seat frame connection locking mechanism 7 includes 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, and 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 its unlocking action by the seat frame connection unlocking mechanism 73.

[0052] like Figure 3 , 4 As shown, in order to reliably lock the armrest connecting rod 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 connecting rod 32 and is used to snap-fit ​​with the seat frame connection locking portion, and the seat frame connection locking elastic member 72 is a seat frame connection locking torsion spring arranged 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.

[0053] like Figure 3 , 4As shown, for the convenience of unlocking, the seat frame connection unlocking mechanism 73 includes 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 is flipped forward to a preset angle relative to the armrest connecting rod 32. In this embodiment, the seat frame connection unlocking member is a seat frame connection unlocking protrusion provided on the backrest portion 2, and the seat frame connection unlocking protrusion is provided with a seat frame connection unlocking driving inclined surface for unlocking and cooperating with the seat frame connection unlocking protrusion protruding in the middle of the seat frame connection locking member 71.

[0054] 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 connecting rod 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 locking state of the armrest connecting rod and the seat frame connector. At this moment, the seat frame can be removed from the baby carriage 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 allowing the seat frame connection unlocking driving inclined surface to release the driving force on the seat frame connection unlocking protrusion. At this moment, 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.

[0055] 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 connecting rod 32, an armrest locking mechanism 9 for locking the armrest assembly 8 relative to the armrest connecting rod 32 is provided between the end of the armrest assembly 8 and the upper end of the armrest connecting rod 32, and an armrest folding unlocking mechanism 94 is provided between the upper end of the armrest connecting rod 32 and the upper end of the seat connecting rod 31 for linking the unlocking action of the armrest locking mechanism 9 when the seat connecting rod 31 is rotated and folded to a preset angle relative to the armrest connecting rod 32.

[0056] 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 arranged at the upper end of the armrest connecting rod 32 and an armrest locking sliding seat 92 axially slidably arranged 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.

[0057] like Figure 1-4As shown, in order to better link the armrest assembly to unlock, the armrest folding and unlocking mechanism 94 includes an armrest folding and unlocking sliding seat 941 which can be axially slidably arranged between the upper end of the seat connecting rod 31 and the upper end of the armrest connecting rod 32, and the armrest folding and unlocking sliding seat 941 is provided with an armrest folding and 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 and unlocking mechanism 94 also includes an armrest folding and unlocking driving member 943 which is arranged at the upper end of the seat connecting rod 31 and is 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. 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, and 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 portion is flipped forward and folded, the backrest portion pushes the armrest assembly to rotate and fold accordingly until the armrest assembly is folded between the seat portion and the backrest portion.

[0058] like Figure 3 , 4 As shown, the armrest folding unlocking driving member 943 is an armrest folding unlocking driving protrusion provided at the upper end of the seat connecting rod 31, and the armrest folding unlocking driving protrusion has a driving arc surface / inclined surface, and the armrest folding unlocking sliding seat 941 is provided with an armrest folding unlocking driving cavity with a driving arc surface / inclined surface for use with the armrest folding unlocking driving protrusion on one side facing the seat connecting rod 31. When the seat frame is in the unfolded use state, the armrest folding unlocking driving protrusion is located inside the armrest folding unlocking driving cavity, which can make the structure between the seat connecting rod and the armrest connecting rod more compact.

[0059] like Figure 1 , 3 As shown in Figures 4 and 5, the armrest assembly 8 is in a U-shaped structure. When the armrest assembly 8 is in the folded state, the middle of the armrest assembly 8 abuts against the front edge of the seat portion 1, which can prevent the armrest assembly from interfering with the backrest and the seat portion from getting close to each other, ensuring that the backrest and the seat portion fit closely together, thereby making the seat frame structure more compact and minimizing the volume after folding. Furthermore, the front edge of the seat portion 1 has a receiving recess for accommodating the middle of the armrest assembly 8. When the middle of the armrest assembly 8 is located in the receiving recess, the upper side of the armrest assembly is not higher than the upper surface of the seat portion.

[0060] In some 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 .

[0061] like Figure 1-6 As shown, a baby carriage of the present 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 is connected to the seat frame connector 110. The seat frame is detachably connected to the seat frame connector 110.

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 used to lock the seat frame in an unfolded use state; A seat frame folding and unlocking mechanism (5) is located on the seat frame and is used to link with a 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) comprises 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 axis B, and the lower end of the armrest connecting rod (32) can be detachably connected to a seat frame connector of a 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 portion (2) and is used to lock the backrest portion (2) relative to the armrest connecting rod (32); the seat frame locking mechanism (4) comprises 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; a seat frame locking elastic member is provided between the seat frame locking member and the backrest portion (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), and 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) correspondingly provided on the backrest (2) or the armrest connecting rod (32) and cooperating with the backrest guide arc groove (61) for guiding.

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 a 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 the seat frame connection 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 also 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 arranged between the seat frame connection locking member (71) and the armrest connecting rod (32) and used 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).

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 buckle with the seat frame connection locking part; the seat frame connection locking elastic member (72) is a seat frame connection locking torsion spring arranged 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 which is arranged 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).

11. An automatically foldable seat frame according to any one of claims 2 to 10, characterized in that The invention also comprises an armrest assembly (8), wherein the corresponding end of the armrest assembly (8) is rotatably connected to the upper end of the armrest connecting rod (32), an armrest locking mechanism (9) for locking the armrest assembly (8) relative to the armrest connecting rod (32) is provided between the end of the armrest assembly (8) and the upper end of the armrest connecting rod (32), and an armrest folding unlocking mechanism (94) for interlocking the armrest locking mechanism (9) to unlock when the seat connecting rod (31) is rotated and folded to a preset angle relative to the armrest connecting rod (32) is provided between the upper end of the armrest connecting rod (32) and the upper end of the seat connecting rod (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) arranged at the upper end of the armrest connecting rod (32) and an armrest locking sliding seat (92) axially slidably arranged on the end of the armrest assembly (8); the armrest locking sliding seat (92) is provided with an armrest locking pin (921) which can be inserted into the armrest locking hole (91); an armrest locking elastic member (93) for driving the armrest locking sliding seat (92) to elastically return to its original position 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).

13. The automatically foldable seat frame according to claim 12, characterized in that The armrest folding and unlocking mechanism (94) comprises 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); the armrest folding and unlocking sliding seat (941) is provided with an armrest folding and unlocking pushing push pin (942) which 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 comprises an armrest folding and unlocking driving member (943) which is arranged at the upper end of the seat connecting rod (31) and is 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 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 according to any one of claims 1 to 14.

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