A simple stroller frame

Abstract

The utility model discloses a simple baby carriage frame, including the front pole, the rear pole upper end and the front pole upper portion between through rear foot joint rotatably connected, the push rod lower extreme and the front pole upper extreme between through push rod joint rotatably connected, the linkage bar upper end and push rod lower portion between through upper linkage joint rotatably connected, the linkage bar lower extreme and the rear pole lower portion between through lower linkage joint rotatably connected, the elastic reset member is established in one or more in rear foot joint, push rod joint, upper linkage joint and lower linkage joint, the elastic reset member is configured for when baby carriage frame is unlocked to be used for helping baby carriage frame automatic folding, through the elastic reset member is established in one or more in rear foot joint, push rod joint, upper linkage joint and lower linkage joint, when baby carriage frame is unlocked, the elastic reset member helps baby carriage frame automatic folding, saves the strength of user, has improved the convenience of using significantly.

Description

[Technical Field]

[0001] This utility model relates to the field of children's travel products technology, and in particular to a simple children's stroller frame. [Background Technology]

[0002] Currently, the folding process of traditional children's bicycle frames relies on manual force and lacks automatic assisted reset function. The joints of traditional frames are only rigidly connected or simply buffered by springs. When folding, the user needs to actively apply pressure to push the links to rotate. Especially when the frame is under load, the folding resistance increases, and the user needs to exert continuous force to complete the folding. The operation is laborious and is prone to joint jamming or even damage due to uneven force.

[0003] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a simple children's stroller frame. By setting an elastic reset member on one or more of the rear foot joint, push rod joint, upper linkage joint and lower linkage joint, when the stroller frame is unlocked, the elastic reset member helps the stroller frame to automatically fold, saving the user's strength. In particular, it can be operated with one hand, which significantly improves the convenience of use.

[0005] This utility model is achieved through the following technical solution:

[0006] A simple stroller frame 1, which can be switched between an unfolded and folded usage state, includes:

[0007] Front post 11;

[0008] The upper end of the rear leg 12 is rotatably connected to the upper part of the front leg 11 via a rear leg joint 120.

[0009] Push rod 13, the lower end of which is rotatably connected to the upper end of front foot rod 11 via push rod joint 14;

[0010] Linkage rod 15, the upper end of which is rotatably connected to the lower part of push rod 13 via upper linkage joint 151, and the lower end of linkage rod 15 is rotatably connected to the lower part of rear foot rod 12 via lower linkage joint 152;

[0011] An elastic reset member 16 is provided on one or more of the rear foot joint 120, push rod joint 14, upper linkage joint 151 and lower linkage joint 152. The elastic reset member 16 is configured to assist the automatic folding of the stroller frame 1 when the stroller frame 1 is unlocked.

[0012] The frame locking mechanism 17 is located on one of the rear leg joint 120, the push rod joint 14 and the upper linkage joint 151, for locking the stroller frame 1.

[0013] The frame unlocking part 18 is provided on the stroller frame 1 and is used to receive the release force and transmit it to the frame locking mechanism 17. The release force is generated during the folding process of the seat frame 2 or by the user's action on the frame unlocking part 18.

[0014] As described above, in a simple children's stroller frame, both the rear leg joint 120 and the upper linkage joint 151 are provided with elastic reset members 16.

[0015] As described above, in a simple children's stroller frame, the push rod joint 14 includes a push rod joint block 141 located at the upper end of the front leg 11 and a push rod joint block 142 located at the lower end of the push rod 13 and rotatably connected to the push rod joint block 141; the frame locking mechanism 17 includes a frame locking part 171 located on the push rod joint block 142 and a frame locking member 172 movably located on the push rod joint block 141 and locked in cooperation with the frame locking part 171; a frame locking elastic member 173 is provided between the frame locking member 172 and the push rod joint block 141 for driving the frame locking member 172 to elastically reset; the lower end of the frame locking member 172 extends out of the push rod joint 14 to form a frame unlocking part 18.

[0016] As described above, in a simple children's stroller frame, a frame connector 19 is provided on the inner side of the push rod joint 14. The frame connector 19 can be connected to a seat frame 2 in either the forward or reverse direction. The seat frame 2 connected to the frame connector 19 in both the forward and reverse directions can provide a release force to the frame unlocking part 18 during the rotation and folding process.

[0017] As described above, a simple stroller frame includes a seat frame 2 comprising a seat frame connector 21, a seat portion 22, a seat frame locking member 23, and a backrest 24. The seat frame connector 21 is detachably connected to a frame connector 19. The rear end of the seat portion 22 has a seat connecting seat 221 for rotatably connecting to the seat frame connector 21. The seat frame locking member 23 is slidably located between the seat connecting seat 221 and the seat frame connector 21. A connection is provided between the seat connecting seat 221 and the seat frame locking member 23 to connect the seat connecting seat 221 relative to the seat frame. The seat locking mechanism 25 is locked by the connector 21. The seat frame locking member 23 is configured to be unlocked by the backrest 24 during the rotation and folding process. The lower end of the backrest 24 has a backrest connecting seat 241 for rotatably connecting with the seat connecting seat 221. A backrest locking mechanism 26 is provided between the backrest connecting seat 241 and the seat connecting seat 221 for locking the backrest connecting seat 241 relative to the seat connecting seat 221. A backrest unlocking mechanism 27 is provided on the backrest 24 for being linked with the backrest locking mechanism 26.

[0018] As described above, in a simple children's stroller frame, the seat frame 2 further includes an armrest portion 28. The end of the armrest portion 28 has an armrest connecting seat 281 for rotatably connecting with the seat frame connector 21. An armrest locking mechanism 29 is provided between the armrest connecting seat 281 and the seat frame locking member 23 for locking the armrest connecting seat 281 relative to the seat frame connector 21.

[0019] In the simple stroller frame described above, during the rotation and folding process of the backrest 24, the backrest connecting seat 241 first triggers the unlocking action of the armrest locking mechanism 29, and then triggers the unlocking action of the seat locking mechanism 25.

[0020] As described above, in a simple stroller frame, the seat locking mechanism 25 includes a seat locking groove 251 on the seat connecting seat 221 and a seat locking tooth 252 on the seat frame locking member 23 for locking engagement with the seat locking groove 251. A seat locking elastic member 253 for driving the seat frame locking member 23 to elastically reset is provided between the seat frame locking member 23 and the seat frame connector 21. A seat unlocking drive member 242 is provided on the backrest connecting seat 241, and a seat unlocking inclined part 231 for linkage with the seat unlocking drive member 242 is provided at the corresponding end of the seat frame locking member 23.

[0021] As described above, in a simple children's stroller frame, the armrest locking mechanism 29 includes an armrest locking groove 291 provided on the armrest connecting seat 281 and an armrest locking tooth 292 provided on the seat frame locking member 23 for locking and engaging with the armrest locking groove 291; the corresponding end of the seat frame locking member 23 is provided with an armrest unlocking inclined part 232 for linkage with the seat unlocking drive member 242.

[0022] As described above, a simple stroller frame includes a seat frame 2 having a seat frame connector 21 detachably connected to a frame connector 19 and a seat connecting seat 221 rotatably connected to the seat frame connector 21. The seat frame connector 21 is movably provided with a frame unlocking linkage 211, and the seat connecting seat 221 is provided with a frame unlocking drive 222 that rotates accordingly with the seat connecting seat 221. The frame unlocking linkage 211 is configured to be linked by the frame unlocking drive 222 during the rotation of the seat connecting seat 221 relative to the seat frame connector 21, thereby providing a release force to the frame unlocking part 18. The frame unlocking drive 222 is configured to release the linkage of the frame unlocking linkage 211 when the seat frame 2 is connected to the stroller frame 1 in the unfolded use state and during the unfolding of the seat frame 2.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. This utility model provides an elastic reset component on one or more of the rear foot joint, push rod joint, upper linkage joint, and lower linkage joint. When the stroller frame is unlocked, the elastic reset component helps the stroller frame to fold automatically, which is especially convenient for users to operate with one hand and significantly improves the ease of use.

[0025] 2. This utility model places the frame unlocking part on the push rod joint, and uses it to receive the release force and transmit it to the frame locking mechanism. The release force is generated during the folding process of the seat frame or by the user's action on the frame unlocking part, which makes it easy for the user to operate according to the folding needs. The operation is simple and convenient.

[0026] 3. This utility model directly links the unlocking part of the frame with the folding action of the seat frame, meaning that the user does not need to manually operate the stroller frame to unlock. The user only needs to complete the natural action of folding the seat frame to trigger the stroller frame to unlock simultaneously. This "action triggers" design greatly simplifies the stroller folding process, conforms to the user's intuition, and is especially suitable for one-handed operation (such as when a parent is holding a child and folds the stroller with the other hand, which significantly improves the efficiency of folding the stroller).

[0027] 4. The seat frame, which is connected to the frame connector in both forward and reverse directions, can provide a release force to the unlocking part of the frame during rotation and folding. That is, through the universal linkage structure between the seat frame connector and the frame connector, the forward and reverse installation requirements of the seat frame are deeply integrated with the core logic of "folding trigger unlocking". This achieves flexibility in usage scenarios, consistency in operation logic, optimization of structural costs, and improvement of safety, which better meets the comprehensive needs of family users for children's strollers that are "adaptable to multiple scenarios, easy to use, safe and reliable".

[0028] 5. The frame unlocking linkage is dynamically linked with the rotation and folding action of the seat connector. When the seat connector folds down relative to the seat frame connector, it provides a release force to the frame unlocking part. During the unfolding of the seat frame, it automatically releases the linkage constraint of the frame unlocking drive component on the frame unlocking linkage component, thereby releasing the release force provided by the frame unlocking linkage component to the frame unlocking part. This effectively solves the problems of inconvenient linkage operation, complex structure and unfolding interference in traditional technologies, and provides a better solution for the folding and locking system of folding vehicles. It features convenient unlocking linkage and safe and reliable use. [Attached Image Description]

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is one of the perspective views of the present invention in its unfolded and usable state.

[0031] Figure 2 This is the second perspective view of the present invention in its unfolded and usable state.

[0032] Figure 3 This is a side view of the present invention in its unfolded and usable state.

[0033] Figure 4 This is a perspective view of the present invention in its folded and used state.

[0034] Figure 5 This is a side view of the present invention in its folded and used state.

[0035] Figure 6 This is a perspective view of the seat frame and stroller frame of this utility model when separated.

[0036] Figure 7 This is one of the exploded views of the children's stroller frame in this utility model.

[0037] Figure 8 This is the second exploded view of the children's stroller frame in this utility model.

[0038] Figure 9 This is one of the exploded views of the frame in this utility model.

[0039] Figure 10 This is the second exploded view of the frame in this utility model.

[0040] Figure 11 This is one of the perspective views of the seat locking mechanism in this utility model.

[0041] Figure 12 This is the second perspective view of the seat locking mechanism in this utility model.

[0042] Figure 13 This is a side view of the backrest locking mechanism in this utility model.

[0043] Figure 14 This is a perspective view of the backrest unlocking mechanism in this utility model.

[0044] Figure 15 This is a perspective view of the seat frame of this utility model when it is installed in reverse on the frame of a children's stroller.

Detailed Implementation Methods

[0045] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0046] like Figure 1-15 As shown, this utility model discloses a simple stroller frame. The stroller frame 1 can be switched between an unfolded and folded use state. It includes a front leg bar 11, a rear leg bar 12, a push rod 13, a linkage rod 15, an elastic reset member 16, a frame locking mechanism 17, and a frame unlocking part 18. The upper end of the rear leg bar 12 is rotatably connected to the upper part of the front leg bar 11 via a rear leg joint 120; the lower end of the push rod 13 is rotatably connected to the upper end of the front leg bar 11 via a push rod joint 14; the upper end of the linkage rod 15 is rotatably connected to the lower part of the push rod 13 via an upper linkage joint 151, and the lower end of the linkage rod 15 is rotatably connected to the lower part of the rear leg bar 12 via a lower linkage joint 152; the elastic reset member 16 is provided at the rear leg joint 120, the push rod joint 14, the upper linkage joint 151, and the lower linkage joint. On one or more of the joints 152, the elastic reset member 16 is configured to assist the automatic folding of the stroller frame 1 when it is unlocked; the frame locking mechanism 17 is provided on one of the rear leg joint 120, the push rod joint 14, and the upper linkage joint 151 to lock the stroller frame 1; the frame unlocking part 18 is provided on the stroller frame 1 to receive the release force and transmit it to the frame locking mechanism 17. This release force is generated during the folding process of the seat frame 2 or by the user's action on the frame unlocking part 18. This invention, by providing the elastic reset member on one or more of the rear leg joint, the push rod joint, the upper linkage joint, and the lower linkage joint, allows the stroller frame to automatically fold when unlocked, making it particularly convenient for one-handed operation and significantly improving ease of use.

[0047] like Figure 7 , 8As shown, both the rear leg joint 120 and the upper linkage joint 151 are equipped with elastic return elements 16. Preferably, the elastic return element 16 is a torsion spring or the like. During the folding process, the elastic return element of the rear leg joint provides an elastic return force for "folding the rear leg forward," and the elastic return element of the upper linkage joint provides an elastic return force for "folding the push rod downward." The two work together to form a multi-stage linkage return of "rear leg - linkage rod - push rod." Compared with setting an elastic return element in only a single joint, it can drive the entire stroller frame to fold more efficiently, reducing the force required for manual assistance by the user. It is especially suitable for parents to quickly fold the stroller with one hand (such as when holding a child).

[0048] like Figure 6-8 As shown, for reliable locking and convenient unlocking, the push rod joint 14 includes a push rod joint block 141 located at the upper end of the front foot rod 11 and a push rod joint block 142 located at the lower end of the push rod 13 and rotatably connected to the push rod joint block 141; the frame locking mechanism 17 includes a frame locking part 171 located on the push rod joint block 142 and a frame locking member 172 movably located on the push rod joint block 141 and locked in cooperation with the frame locking part 171; a frame locking elastic member 173 is provided between the frame locking member 172 and the push rod joint block 141 for driving the frame locking member 172 to elastically reset; the lower end of the frame locking member 172 extends out of the push rod joint 14 to form a frame unlocking part 18. Specifically, push rod joint block 141 is integrally formed or detachably connected to the front foot rod 11, and push rod joint block 142 is integrally formed or detachably connected to the push rod 13. When an integrally formed structure is used, structural strength and stability are improved. When a detachable connection structure is used, maintenance and replacement are facilitated, reducing replacement costs.

[0049] In other embodiments, the frame unlocking part 18 is movably mounted on the push rod 13 and is linked with the frame locking part 172 to facilitate user operation for unlocking, which is not shown in the figure.

[0050] like Figure 6 As shown, to facilitate user operation, the two frame unlocking parts 18 are connected to frame unlocking pull ropes for user operation.

[0051] like Figure 1-6As shown in Figures 9, 10, and 15, a frame connector 19 is provided on the inner side of the push rod joint 14. The frame connector 19 can be connected to the seat frame 2 in either the forward or reverse direction. Both the forward and reverse connected seat frame 2 to the frame connector 19 can provide a release force to the frame unlocking part 18 during rotation and folding. Through the universal linkage structure between the seat frame connector and the frame connector, the forward and reverse installation requirements of the seat frame are deeply integrated with the core logic of "folding trigger unlocking," achieving flexibility in usage scenarios, consistency in operating logic, optimization of structural costs, and improvement in safety. This better meets the comprehensive needs of family users for a children's stroller that is "adaptable to multiple scenarios, easy to use, and safe and reliable."

[0052] like Figure 1-6As shown in Figures 9-15, for reliable locking, the seat frame 2 includes a seat frame connector 21, a seat portion 22, a seat frame locking member 23, and a backrest 24. The seat frame connector 21 is detachably connected to the frame connector 19. The rear end of the seat portion 22 has a seat connecting seat 221 for rotatably connecting to the seat frame connector 21. The seat frame locking member 23 is slidably located between the seat connecting seat 221 and the seat frame connector 21. A space is provided between the seat connecting seat 221 and the seat frame locking member 23 for positioning the seat connecting seat 221 relative to the seat frame. The seat frame 21 includes a seat locking mechanism 25 that is locked by the connector 21. The seat frame locking member 23 is configured to be unlocked by the backrest 24 during rotation and folding. The lower end of the backrest 24 has a backrest connecting seat 241 for rotatable connection with the seat connecting seat 221. A backrest locking mechanism 26 is provided between the backrest connecting seat 241 and the seat connecting seat 221 to lock the backrest connecting seat 241 relative to the seat connecting seat 221. The backrest 24 has a backrest unlocking mechanism 27 that is linked to the backrest locking mechanism 26. The seat frame 2 also includes an armrest portion 28. The end of the armrest portion 28 has an armrest connecting seat 281 for rotatable connection with the seat frame connector 21. An armrest locking mechanism 29 is provided between the armrest connecting seat 281 and the seat frame locking member 23 to lock the armrest connecting seat 281 relative to the seat frame connector 21. During unlocking, the backrest unlocking mechanism 27 is operated in conjunction with the backrest locking mechanism 26 to unlock, thereby releasing the locking state of the backrest connecting seat 241 relative to the seat connecting seat 221. Then, the backrest 24 is operated to rotate and fold towards the seat 22. During the rotation and folding of the backrest 24, the backrest connecting seat 241 first triggers the unlocking action of the armrest locking mechanism 28, and then triggers the unlocking action of the seat locking mechanism 25, causing the armrest to rotate and fold towards the seat, and the seat to rotate relative to the seat frame connector and fold towards the front footrest. During the folding of the seat, the frame unlocking drive 222 rotates accordingly with the seat connecting seat 221 and triggers the frame unlocking linkage 211 to move accordingly relative to the seat frame connector, so that the frame unlocking linkage 211 provides a release force to the frame unlocking part 18 to trigger the unlocking action of the frame locking part 172.

[0053] like Figure 6 , 9As shown in Figure 10, a connecting assembly 210 is provided between the seat frame connector 21 and the frame connector 19. The connecting assembly 210 includes, but is not limited to, a connecting slot 2101 provided on the frame connector 19 and a connecting block 2102 slidably provided on the seat frame connector 21 and locked in engagement with the connecting slot 2101. An elastic element is provided between the connecting block 2102 and the seat frame connector 21. The seat frame connector 21 is slidably provided with a connection unlocking button 2103 that is linked to the connecting block 2102. When unlocking, the user presses the connection unlocking button 2103 to drive the connecting block 2102 to slide relative to the seat frame connector 21, causing the connecting block 2102 to separate from the connecting slot 2101, thereby allowing the seat frame connector 21 to be detached from the frame connector 19.

[0054] Preferably, during the rotation and folding process of the backrest 24, the backrest connecting seat 241 first triggers the unlocking action of the armrest locking mechanism 29, and then triggers the unlocking action of the seat locking mechanism 25. By adopting the unlocking sequence of "armrest first, then seat," that is, by adjusting the constraint release timing of key components, the space utilization of the folding path is optimized, and the smoothness of the folding process is significantly improved.

[0055] like Figure 9-12 As shown, for reliable locking, the seat locking mechanism 25 includes a seat locking groove 251 on the seat connecting seat 221 and a seat locking tooth 252 on the seat frame locking member 23 for locking engagement with the seat locking groove 251. A seat locking elastic member 253 for elastically resetting the seat frame locking member 23 is provided between the seat frame locking member 23 and the seat frame connector 21. A seat unlocking drive member 242 is provided on the backrest connecting seat 241, and a seat unlocking inclined portion 231 for linkage with the seat unlocking drive member 242 is provided at the corresponding end of the seat frame locking member 23. Figure 11 , 12 As shown, in order to make the locking structure more stable and reliable and enhance its impact and vibration resistance, the plurality of seat locking teeth 252 are symmetrically arranged on the left and right sides.

[0056] like Figure 9-12As shown, for reliable locking, the armrest locking mechanism 29 includes an armrest locking groove 291 on the armrest connecting seat 281 and an armrest locking tooth 292 on the seat frame locking member 23 for locking and engaging with the armrest locking groove 291; the corresponding end of the seat frame locking member 23 is provided with an armrest unlocking inclined part 232 for linkage with the seat unlocking drive member 242. During the rotation and folding process of the backrest connecting seat 241 relative to the seat connecting seat 221, the backrest connecting seat 241 drives the armrest unlocking ramp 232 through the seat unlocking drive member 242, causing the seat frame locking member 23 to slide towards the seat frame connector 21. This causes the armrest locking teeth 292 to separate from the armrest locking groove 291, thereby releasing the locking state of the armrest connecting seat 281 relative to the seat frame connector 21. (At this moment, the seat locking teeth 252 still maintains a locking engagement with the seat locking groove 251.) Then, during the continued rotation and folding process of the backrest connecting seat 241, the seat unlocking drive member 242 drives the seat unlocking ramp 231, causing the seat frame locking member 23 to continue sliding towards the seat frame connector 21. This causes the seat locking teeth 252 to separate from the seat locking groove 251, thereby releasing the locking state of the seat connecting seat 221 relative to the seat frame connector 21.

[0057] This utility model integrates the seat locking teeth 252 and the armrest locking teeth 292 onto the seat frame locking member 23, forming a single integral structure. This improves assembly efficiency and consistency, makes the structure more compact, simplifies the number of parts, and reduces manufacturing costs.

[0058] like Figure 1-6 As shown in Figures 9, 10, 13, and 14, for reliable locking, the backrest locking mechanism 26 includes, but is not limited to, a backrest locking notch 261 provided on the seat connecting seat 221 and a backrest locking member 262 slidably provided on the backrest connecting seat 241 and locked in cooperation with the backrest locking notch 261. A backrest locking elastic member 263 is provided between the backrest locking member 262 and the backrest connecting seat 241 for driving the backrest locking member 262 to elastically reset. The backrest unlocking mechanism 27 includes, but is not limited to, a backrest unlocking wrench 271 movably provided on the upper end of the backrest back 24. The backrest unlocking wrench 271 is linked to the backrest locking member 262 through a backrest unlocking linkage member.

[0059] To provide a comfortable seating space, the inner side of the backrest locking notch 261 is provided with a plurality of angular locking notches 2611 for locking with the backrest locking member 262, such as Figure 13 As shown. The backrest locking member 262 is engaged with the corresponding angle locking notch 2611 to adjust the tilt angle of the backrest relative to the seat.

[0060] like Figure 1-6As shown in Figures 9, 10, 13, and 14, to ensure safety and reliability when adjusting the tilt angle, a safety locking mechanism 30 is provided between the backrest unlocking wrench 271 and the backrest. The safety locking mechanism 30 is configured to only allow the backrest unlocking wrench 271 to move within a preset stroke. That is, when the safety locking mechanism is in the locked state, the backrest unlocking wrench 271 can only control the backrest locking member 262 to separate from the angle locking notch 2611, but cannot control the backrest locking member 262 to separate from the backrest locking notch 261; that is, the backrest locking member 262 remains locked in engagement with the backrest locking notch 261. The safety locking mechanism 30 includes, but is not limited to, a safety blocking part 301 provided on the backrest and a safety blocking member 302 slidably provided on the backrest unlocking wrench 271 for engaging with the safety blocking part 301.

[0061] like Figure 9 , 10 As shown, the seat frame 2 has a seat frame connector 21 detachably connected to the frame connector 19 and a seat connecting seat 221 rotatably connected to the seat frame connector 21. The seat frame connector 21 is movably provided with a frame unlocking linkage 211, and the seat connecting seat 221 is provided with a frame unlocking drive 222 that can rotate accordingly with the seat connecting seat 221. The frame unlocking linkage 211 is configured to be linked by the frame unlocking drive 222 when the seat connecting seat 221 rotates relative to the seat frame connector 21, thereby providing a release force to the frame unlocking part 18. The frame unlocking drive 222 is configured to release the linkage of the frame unlocking linkage 211 when the seat frame 2 is connected to the stroller frame 1 in the unfolded use state and when the seat frame 2 is unfolded. The frame unlocking linkage is dynamically linked with the rotation and folding action of the seat connector. When the seat connector folds relative to the seat frame connector, it provides a release force to the frame unlocking part. During the unfolding of the seat frame, it automatically releases the linkage constraint of the frame unlocking drive component on the frame unlocking linkage component, thereby releasing the release force provided by the frame unlocking linkage component to the frame unlocking part. This effectively solves the problems of inconvenient linkage operation, complex structure, and unfolding interference in traditional technologies, providing a better solution for the folding and locking system of folding vehicles. It features convenient unlocking linkage and safe and reliable use.

[0062] The frame unlocking drive 222 is axially slidably mounted on the seat connection seat 221. An elastic element is provided between the frame unlocking drive 222 and the seat connection seat 221 to drive the frame unlocking drive 222 to elastically reset. When the seat connection seat 221 drives the frame unlocking drive 222 to rotate and fold relative to the seat frame connector 21, the frame unlocking drive 222 acts on the unlocking ramp 2111 on the frame unlocking linkage 211 to drive the frame unlocking linkage 211 to move accordingly relative to the seat frame connector 211, thereby causing the frame unlocking linkage 211 to provide a release force to the frame unlocking part. When the seat frame is unfolded, the guide ramp on the frame unlocking drive 222 is acted upon by the frame unlocking linkage 211 to force the frame unlocking drive 222 to retract relative to the seat connection seat 221, thereby releasing the linkage on the frame unlocking linkage 211. An elastic element is provided between the frame unlocking linkage 211 and the seat connector 21 to drive the frame unlocking linkage 211 to elastically reset to the inside of the seat connector 21, which is not shown in the figure.

Claims

1. A simple stroller frame, said stroller frame (1) being switchable between an unfolded, in-use state and a folded, in-use state, characterized in that include: Front pole (11); The upper end of the rear leg (12) is rotatably connected to the upper part of the front leg (11) via a rear leg joint (120); Push rod (13), the lower end of which is rotatably connected to the upper end of the front foot rod (11) via push rod joint (14); Linkage rod (15), the upper end of the linkage rod (15) is rotatably connected to the lower part of the push rod (13) through the upper linkage joint (151), and the lower end of the linkage rod (15) is rotatably connected to the lower part of the rear foot rod (12) through the lower linkage joint (152); An elastic reset member (16) is provided on one or more of the rear foot joint (120), push rod joint (14), upper linkage joint (151) and lower linkage joint (152), and the elastic reset member (16) is configured to assist the automatic folding of the stroller frame (1) when the stroller frame (1) is unlocked. A frame locking mechanism (17) is provided on one of the rear foot joint (120), the push rod joint (14) and the upper linkage joint (151) for locking the stroller frame (1); The frame unlocking part (18) is provided on the stroller frame (1) and is used to receive the release force and transmit it to the frame locking mechanism (17). The release force is generated during the folding process of the seat frame (2) or by the user acting on the frame unlocking part (18).

2. The simple stroller frame according to claim 1, characterized in that... Both the hind leg joint (120) and the upper linkage joint (151) are provided with elastic reset members (16).

3. The stroller frame of claim 1, wherein The push rod joint (14) includes a push rod joint block one (141) located at the upper end of the front foot rod (11) and a push rod joint block two (142) located at the lower end of the push rod (13) and rotatably connected to the push rod joint block one (141); the frame locking mechanism (17) includes a frame locking part (171) located on the push rod joint block two (142) and a frame locking member (172) movably located on the push rod joint block one (141) and locked in cooperation with the frame locking part (171); a frame locking elastic member (173) for driving the frame locking member (172) to elastically reset is provided between the frame locking member (172) and the push rod joint block one (141); the lower end of the frame locking member (172) extends out of the push rod joint (14) to form a frame unlocking part (18).

4. A simple children's stroller frame according to any one of claims 1-3, characterized in that... The push rod joint (14) is provided with a frame connector (19) on its inner side. The frame connector (19) can be connected to a seat (2) in the forward or reverse direction. The seat (2) connected to the frame connector (19) in the forward and reverse directions can provide a release force to the frame unlocking part (18) during the rotation and folding process.

5. The stroller frame of claim 4, wherein The seat frame (2) includes a seat frame connector (21), a seat portion (22), a seat frame locking member (23), and a backrest (24). The seat frame connector (21) is detachably connected to the frame connector (19). The rear end of the seat portion (22) has a seat connecting seat (221) for rotatably connecting to the seat frame connector (21). The seat frame locking member (23) is slidably located between the seat connecting seat (221) and the seat frame connector (21). A space is provided between the seat connecting seat (221) and the seat frame locking member (23) for positioning the seat connecting seat (221) relative to the seat frame connector (21). A locking seat locking mechanism (25) is provided, wherein the seat frame locking member (23) is configured to be unlocked by the backrest (24) during the rotation and folding process; the lower end of the backrest (24) has a backrest connecting seat (241) for rotatably connecting with the seat connecting seat (221), and a backrest locking mechanism (26) for locking the backrest connecting seat (241) relative to the seat connecting seat (221) is provided between the backrest connecting seat (241) and the seat connecting seat (221), and a backrest unlocking mechanism (27) for being linked with the backrest locking mechanism (26) is provided on the backrest (24).

6. The stroller frame of claim 5, wherein The seat frame (2) also includes an armrest (28), the end of which has an armrest connecting seat (281) for rotatably connecting with the seat frame connector (21), and an armrest locking mechanism (29) for locking the armrest connecting seat (281) relative to the seat frame connector (21) is provided between the armrest connecting seat (281) and the seat frame locking member (23).

7. The stroller frame of claim 6, wherein During the rotation and folding process of the backrest (24), the backrest connecting seat (241) first links the armrest locking mechanism (29) to unlock, and then links the seat locking mechanism (25) to unlock.

8. The stroller frame of claim 7, wherein The seat locking mechanism (25) includes a seat locking groove (251) on the seat connecting seat (221) and a seat locking tooth (252) on the seat frame locking member (23) for locking and engaging with the seat locking groove (251). A seat locking elastic member (253) for driving the seat frame locking member (23) to elastically reset is provided between the seat frame locking member (23) and the seat frame connector (21). A seat unlocking drive member (242) is provided on the backrest connecting seat (241), and a seat unlocking inclined part (231) is provided at the corresponding end of the seat frame locking member (23) for linkage with the seat unlocking drive member (242).

9. The stroller frame of claim 8, wherein The armrest locking mechanism (29) includes an armrest locking groove (291) on the armrest connecting seat (281) and an armrest locking tooth (292) on the seat frame locking member (23) for locking and engaging with the armrest locking groove (291); the corresponding end of the seat frame locking member (23) is provided with an armrest unlocking inclined part (232) for linkage with the seat unlocking drive member (242).

10. The stroller frame of claim 4, wherein The seat frame (2) has a seat frame connector (21) detachably connected to the frame connector (19) and a seat connecting seat (221) rotatably connected to the seat frame connector (21). The seat frame connector (21) is movably provided with a frame unlocking linkage (211). The seat connecting seat (221) is provided with a frame unlocking drive (222) that can rotate accordingly with the seat connecting seat (221). The frame unlocking linkage (211) is configured to be linked by the frame unlocking drive (222) when the seat connecting seat (221) rotates relative to the seat frame connector (21), thereby causing the frame unlocking linkage (211) to provide a release force to the frame unlocking part (18). The frame unlocking drive (222) is configured to release the linkage of the frame unlocking linkage (211) when the seat (2) is connected to the stroller frame (1) in the unfolded use state and when the seat (2) is unfolded.

Images