Wheel alignment mechanism, foldable frame and baby stroller for children

Abstract

Provided are a wheel alignment mechanism, a foldable frame, and a baby stroller for children. 【Solution means】The wheel alignment mechanism includes a drive part, a lock part, and a drag part. The drive part includes a drive member and a trigger part. The trigger part operates by the folding operation and the unfolding operation of the frame, and the drive member moves in a first direction and a second direction facing each other respectively. The lock part locks and unlocks respectively by the movement of the drive member in the first direction and the second direction. The drag part includes a first end and a second end. The first end is connected to the drive part, and the second end is connected to the lock part. When the baby stroller for children is in a folded state, the wheel alignment mechanism can automatically trigger the operation of rotating the wheel seat to the locked position. As a result, the folded baby stroller for children can be stabilized in an upright state convenient for temporary storage.

Description

Technical Field

[0001] The present application relates to a wheel orientation mechanism, a foldable frame, and a baby stroller including the wheel orientation mechanism and the foldable frame.

Background Art

[0002] Baby strollers for children can reduce the fatigue caused by holding a baby for a long time and improve the comfort of people's lives. A baby stroller for children includes a frame part and a wheel part. In order to facilitate storage and transportation when not in use temporarily, the frame part of the baby stroller for children is usually arranged to be foldable, and as a result, the occupied volume of the baby stroller for children during storage is reduced.

[0003] However, existing baby strollers for children usually cannot be made to stand upright in a folded state, or when made to stand upright in a folded state, the folded baby stroller for children is likely to fall due to the slipping of the wheels. Furthermore, when the folded baby stroller for children is placed flat, it still needs to occupy a relatively large storage space, and as a result, it is inconvenient to use. In particular, when the baby stroller for children is folded for a short time, the folded baby stroller for children cannot be stably made to stand upright, causing a lot of inconvenience.

[0004] Furthermore, in order to facilitate the movement and operation of the baby stroller for children, the wheels of the baby stroller for children are generally swivel wheels that can rotate freely. Furthermore, in order to facilitate the storage and transportation of the baby stroller for children, the baby stroller for children may have a folding function.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above problems, an object of the present application is to provide a wheel orientation mechanism that is convenient to use and has a simple structure, and a baby stroller for children including this wheel orientation mechanism.

Means for Solving the Problems

[0006] For this reason, one aspect of the present disclosure provides a wheel orientation mechanism. The wheel orientation mechanism includes a drive unit, a lock unit, and a drag unit. The drive unit includes a drive member and a trigger unit. The trigger unit operates by the folding operation and the unfolding operation of the frame, and the drive member moves in a first direction and a second direction facing each other, respectively. The lock unit locks and unlocks respectively by the movement of the drive member in the first direction and the second direction. The drag unit includes a first end and a second end. The first end is connected to the drive unit, and the second end is connected to the lock unit.

[0007] According to one embodiment, the trigger unit rotates corresponding to the folding operation and the unfolding operation of the frame, and the drive member rotates with respect to the trigger unit.

[0008] According to one embodiment, the lock unit further includes a lock pin and a lock hole. When the frame is folded, the lock pin moves into the lock hole, and when the frame is unfolded, the lock pin moves away from the lock hole.

[0009] According to one embodiment, the first end of the drag unit is connected to an end of the drive member away from the trigger unit, and the second end of the drag unit is connected to an end of the lock pin away from the lock hole.

[0010] According to one embodiment, the drive unit further includes a chute, and the drive member slides in the chute along the first direction and the second direction, respectively.

[0011] According to one embodiment, the chute includes a fixing portion and an orientation portion provided inside thereof, and the fixing portion and the orientation portion are respectively provided at opposite ends of the chute.

[0012] According to an embodiment, the drive member includes an end portion, a receiving groove, and an orientation groove. The end portion is located at an end of the drive member facing the trigger portion. The receiving groove is located at an end of the drive member away from the trigger portion. The orientation groove is located between the end portion and the receiving groove.

[0013] According to an embodiment, the end portion includes an inclination angle at its side end portion.

[0014] According to an embodiment, the orientation portion in the chute passes through the orientation groove of the drive member.

[0015] According to an embodiment, the trigger portion includes a drive slope and a concave curved surface. The drive slope is located on one side of the trigger portion. The concave curved surface is provided adjacent to the drive slope and is located on the other side of the trigger portion.

[0016] According to an embodiment, when the frame is folded from the deployed position, the end portion of the drive member slides from contacting the concave curved surface until contacting the drive slope. When the frame is deployed from the folded position, the end portion of the drive member slides from contacting the drive slope until contacting the concave curved surface.

[0017] According to an embodiment, when the frame is in a completely folded state, the end portion of the drive member contacts the edge of the end of the drive slope.

[0018] According to an embodiment, the wheel alignment mechanism further includes a first reset member and a second reset member. The first reset member is provided on the drive portion. The second reset member is provided on the lock portion.

[0019] According to an embodiment, both the first reset member and the second reset member are elastic members. The elastic force of the first reset member is greater than the elastic force of the second reset member.

[0020] According to one embodiment, corresponding to the frame being in the folded position, the first reset member is in a compressed state, the second reset member is in a released state, and corresponding to the frame being in the deployed position, the first reset member is in a released state and the second reset member is in a compressed state.

[0021] According to one embodiment, one end of the first reset member is fixed to the fixed portion of the chute, and the other end of the first reset member is fixed to the drive member.

[0022] According to one embodiment, the second reset member is fixedly provided above or below the locking pin of the locking portion, or the second reset member is provided in a receiving groove and is connected to the locking pin of the locking portion.

[0023] According to one embodiment, the wheel orientation mechanism further includes a guide portion having a guide slot, and a part between the first end and the second end of the drag portion is located within the guide slot.

[0024] According to one embodiment, the drag portion is a steel wire.

[0025] Another aspect of the present application provides a baby stroller for children. The baby stroller for children is provided with the above wheel orientation mechanism, the locking portion is provided at a pivot joint between the front leg of the frame and the wheel seat, and the driving portion is at least partially provided at a pivot joint between the front leg, the rear leg, and the handle linkage portion of the frame.

[0026] According to one embodiment, when the baby stroller for children is folded, the trigger portion rotates correspondingly, and the drive member rotates with respect to the trigger portion by the folding operation and the deployment operation of the frame.

[0027] According to one embodiment, the trigger portion of the drive portion is provided at the pivot joint between the front leg, the rear leg, and the handle linkage portion of the frame.

[0028] According to one embodiment, the locking hole of the locking portion is provided in the wheel seat of the wheel.

[0029] According to one embodiment, the guide portion is provided on the front leg.

[0030] Another aspect of the present disclosure provides a foldable frame and a baby stroller for children. The foldable frame and the baby stroller for children can stand stably on the ground after being folded so as to facilitate a consumer to upright the baby stroller for children.

[0031] Therefore, a foldable frame is provided. The foldable frame includes a frame body, a wheel assembly, a drive assembly, and an orientation assembly. The frame body has a deployed state and a folded state. The wheel assembly is rotatably connected to the frame body. The drive assembly is provided on the frame body. The orientation assembly is provided between the frame body and the wheel assembly. When the frame body is in the deployed state, the orientation assembly is unlocked, and the wheel assembly rotates with respect to the frame body. When the frame body is in the folded state, the drive assembly drives such that the orientation assembly is locked, and the wheel assembly and the frame body are relatively fixed at a predetermined position.

[0032] According to one embodiment, the orientation assembly includes an orientation element and an orientation groove. The orientation element is possibly provided on the frame body. The wheel assembly includes a wheel seat rotatably connected to the frame body. The orientation groove is provided in the wheel seat and is offset from the rotation center of the wheel seat. When the wheel assembly rotates to the predetermined position with respect to the frame body, the orientation element is inserted into the orientation groove.

[0033] According to an embodiment, the orientation assembly further includes a first reset member, both ends of the first reset member are respectively in contact with the frame body and the orientation element, and the first reset member always moves the orientation element in a direction approaching the wheel seat.

[0034] According to an embodiment, the drive assembly includes a drive member and a drag portion, both ends of the drag portion are respectively connected to the frame body and the drive member, and when the frame body is in the deployed state, the drag portion is tightened and always driven by the drive member to move the orientation element in a direction away from the wheel seat. When the frame is in the folded state, the drag portion is loosened, and the orientation element moves in a direction approaching the wheel seat under the action of the first reset member.

[0035] According to an embodiment, the drive member is rotatably provided on the frame body, the drive member has transmission teeth and has a first rotation position and a second rotation position. When the drag portion is tightened, the drive member rotates to the first rotation position, and the transmission teeth push the orientation element along a direction away from the wheel seat. When the drag portion is loosened, the drive member rotates to the second rotation position without pushing the orientation element along a direction away from the wheel seat.

[0036] According to an embodiment, the contact pressing element is provided on one side of the orientation element. When the drag portion is tightened, the transmission teeth contact the side of the contact pressing element close to the wheel seat.

[0037] According to an embodiment, the drive assembly includes a second reset member, and the second reset member always moves the drive member to the second rotation position.

[0038] According to one embodiment, the drive teeth are provided on the drive member, and a plurality of tooth grooves are provided annularly on the wheel seat. When the drive member rotates, the drive teeth abut against the groove walls of any corresponding tooth grooves to drive the wheel seat to rotate.

[0039] According to one embodiment, when the drive teeth are inserted into any tooth grooves, there is a gap between the drive teeth and the tooth grooves.

[0040] According to one embodiment, when the drive teeth are inserted into any tooth grooves, the maximum width of the tooth grooves is larger than the maximum width of the portion where the drive teeth are inserted into the tooth grooves.

[0041] According to one embodiment, the drive teeth include a first hypotenuse and a second hypotenuse having an inclination angle. The second hypotenuse is configured to abut against the groove wall of any corresponding tooth groove, and the inclination angle of the first hypotenuse is larger than the inclination angle of the second hypotenuse.

[0042] According to one embodiment, the frame body includes a front leg support rod, a handrail support rod, and a foldable joint. The front leg support rod and the handrail support rod are rotatably connected to each other via the foldable joint. When the foldable joint is in the locked state, the front leg support rod and the handrail support rod are fixedly deployed with respect to each other. When the foldable joint is in the unlocked state, the front leg support rod and the handrail support rod are folded with respect to each other. The end of the drag portion is connected to the foldable joint.

[0043] According to one embodiment, the frame body further includes a fixing member. The fixing member is provided on the foldable joint and is offset from the rotation center of the foldable joint. The end of the drag portion is connected to the fixing member.

[0044] According to an embodiment, the drive assembly includes a drag portion, both ends of the drag portion are respectively connected to the frame body and the alignment element, and when the frame body is in the deployed state, the drag portion is tightened to always move the alignment element away from the wheel seat, and when the frame body is in the folded state, the drag portion is loosened, and the alignment element moves in a direction approaching the wheel seat under the action of the first reset member.

[0045] According to an embodiment, the drive assembly further includes a pulley fixed to the frame body, the drag portion incorporates the pulley in part, and the pulley is provided along the same direction as the alignment element at a portion of the drag portion close to the alignment element.

[0046] According to an embodiment, the foldable frame further includes a rotating shaft, one end of the rotating shaft is fixed to one of the frame body and the wheel assembly, a pivot hole is provided in the other of the frame body and the wheel assembly, and the other end of the rotating shaft is rotatably inserted into the pivot hole.

[0047] Another aspect of the present application provides a baby stroller for children. The baby stroller for children includes the foldable frame described above.

[0048] Another aspect of the present application provides a wheel alignment mechanism. The wheel alignment mechanism includes a drive guide member, a lock portion, and a drag portion. The lock portion includes a lock member and a lock hole. The drag portion includes a first end connected to the drive guide member and a second end connected to the lock member. The drag portion is tightened or loosened by the drive guide member as the frame is deployed or folded, and the lock member realizes unlocking or locking by being separated from or inserted into the lock hole.

[0049] According to one embodiment, the drive guide member includes a pulley set and a guide post set, and the pulley set and the guide post set are provided along the movement path of the drag portion.

[0050] According to one embodiment, the pulley set includes a first pulley and a second pulley, the guide post set includes a first guide post and a second guide post, and a first end of the drag portion is connected to the handle assembly of the frame through the first pulley, the first guide post, the second guide post, and the second pulley in sequence.

[0051] According to one embodiment, a pivot joint is provided on the rear leg of the frame, and the pivot joint has a lower end connected to the front leg of the frame and an upper end connected to the handle assembly of the frame.

[0052] According to one embodiment, the first pulley and the second pulley are distributed on the upper side and the lower side of the pivot joint, and the first guide post and the second guide post are distributed on the upper side and the lower side of the pivot joint.

[0053] According to one embodiment, the distance between the first guide post and the second guide post in the extending direction of the front leg is smaller than the distance between the first pulley and the second pulley in the extending direction of the front leg.

[0054] According to one embodiment, the first guide post, the second guide post, the first pulley, and the second pulley are all fixed pulleys or all fixed posts.

[0055] According to one embodiment, the first guide post and the second guide post are fixed posts, and the first pulley and the second pulley are fixed pulleys.

[0056] According to one embodiment, the handle assembly includes a handle linkage portion, a first end of the drag portion is connected to the handle linkage portion, and the upper end of the pivot joint rotates relative to the handle linkage portion.

[0057] According to one embodiment, the first pulley is provided at a pivot connection portion between the pivot joint and the front leg, and the second pulley is provided at a pivot connection portion between the pivot joint and the handle linkage portion.

[0058] According to one embodiment, the locking portion further includes a rotating portion. After the locking member drops, it abuts against and presses the rotating portion, causing the locking hole to rotate and align with the locking member to perform locking.

[0059] According to one embodiment, both the rotating portion and the locking hole are located on an end surface facing the frame of the wheel seat of the wheel.

[0060] According to one embodiment, the rotating portion is a continuous spiral surface located on the end surface, and the locking hole is located below the lowest point of the spiral surface.

[0061] According to one embodiment, a stepped surface is provided between the lowest point of the spiral surface and the locking hole.

[0062] According to one embodiment, the locking portion further includes an elastic member that abuts against and presses the locking member when the frame is folded.

[0063] Another aspect of the present application provides a wheel alignment mechanism. The wheel alignment mechanism includes a driving part, a locking part, and a drag part. The locking part includes a locking member and a locking hole. The drag part includes a first end connected to the driving part and a second end connected to the locking member. As the frame is deployed or folded, the drag part moves between a first position where the locking member is inserted into the locking hole to achieve locking and a second position where the locking member is separated from the locking hole to achieve unlocking.

[0064] According to one embodiment, the driving part includes a push member and a slide member. The push member rotates in response to the deployment or folding operation of the frame, and the slide member reciprocates linearly by the push of the push member.

[0065] According to one embodiment, the push member is disposed on the front leg of the frame and includes a pivot part and a contact pressing part. The push member rotates around the pivot part, and the contact pressing part is located at one end of the push member and protrudes outward. When the frame is deployed, the contact pressing part contacts and presses the slide member.

[0066] According to one embodiment, the slide member is provided on the rear leg of the frame and includes a slide part and a protruding end part. The slide part always contacts and supports the tube of the rear leg and slides along the tube of the rear leg when the slide member moves linearly. When the frame is deployed, the contact pressing part contacts and presses the protruding end part.

[0067] According to one embodiment, the push member further includes a perforated part, and the slide member further includes a receiving hole. The first end of the drag part is fixed in the receiving hole, the second end of the drag part surrounds the pivot part, enters the front leg of the frame through the perforated part, and then is fixed to the locking member.

[0068] According to one embodiment, the guide slot is provided in the pivot portion, and the second end of the drag portion surrounds the guide slot, enters the front leg of the frame through the perforation portion, and is then fixed to the locking member.

[0069] According to one embodiment, the locking portion further includes a rotating portion, and after the locking member drops, it abuts and presses the rotating portion, causing the locking hole to rotate and align with the locking member to perform locking.

[0070] According to one embodiment, both the rotating portion and the locking hole are located on the end face of the frame facing the wheel seat of the wheel.

[0071] According to one embodiment, the rotating portion is a spiral surface located on the end face, and the locking hole is located below the lowest point of the spiral surface.

[0072] According to one embodiment, the locking portion further includes an elastic member that abuts and presses the locking member when the frame is folded.

[0073] Another aspect of the present application provides a baby stroller for children including a frame, wheels, and the above-described wheel alignment mechanism. The frame includes a handle assembly, front legs, and rear legs, and the handle assembly, the front legs, and the rear legs can rotate relative to each other at the pivot joint. Each wheel includes a wheel seat.

[0074] The operation of the wheel alignment mechanism may be automatically triggered to rotate the wheel seat to the locked position when the baby stroller for children is in the folded state, and the folded baby stroller for children may be stable in an upright state, which is convenient for temporary storage.

[0075] Furthermore, in the foldable frame according to the present disclosure, the orientation assembly is unlocked when the frame body is in the deployed state, allowing the wheel assembly to rotate relative to the frame body, thereby facilitating the steering of the foldable frame. The drive assembly may drive the orientation assembly to be locked when the frame body is in the folded state, so that the wheel assembly and the frame body may be relatively fixed at a predetermined position, for example, the position where the wheel assembly is located when the foldable frame moves straight forward. The foldable frame in the folded state can stand stably on the ground, and thus can be easily placed vertically by the consumer, significantly saving storage space.

[0076] In addition, the wheel orientation mechanism according to the present disclosure can avoid the interference between the frame, such as the crossbar of the frame, and the wheels, especially the front wheels, from affecting the folding of the frame by rotating the wheels after the baby stroller for children is folded. Therefore, the folding of the baby stroller for children can be performed more smoothly.

[0077] The accompanying drawings are included to further understand the present application, incorporated herein, and constitute a part of this specification, showing embodiments of the present application and useful for explaining the principles of the present application together with the following description.

Brief Description of the Drawings

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MODE FOR CARRYING OUT THE INVENTION

[0079] Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. Although the present disclosure may be subject to various changes and alternative forms, specific embodiments thereof are shown by way of example in the accompanying drawings. However, the present disclosure should not be construed as being limited to the embodiments described herein. On the contrary, the present disclosure is directed to all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments.

[0080] In the following description, a baby stroller for children is taken as an example. However, the wheel orientation mechanism according to the present application is not limited to a baby stroller for children, but rather may be other children's devices that need to lock the wheels.

[0081] First Embodiment: Hereinafter, the baby stroller A1 in the first embodiment of the present application will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic perspective view showing the baby stroller, FIG. 2 is a schematic perspective view showing the baby stroller in the unfolded state, and FIG. 3 is a schematic perspective view showing the baby stroller in the folded state. As shown in FIG. 1, the baby stroller A1 generally includes two members, a frame A20 and wheels A30. In order to improve the convenience during the use of the baby stroller A1, particularly for carrying and storing when not in temporary use, the portion of the frame A20 of the baby stroller A1 is usually foldable. Referring to FIGS. 2 and 3, in the unfolded state shown in FIG. 2, the baby stroller A1 is in a usable state and can be freely pushed and carried with a child. On the other hand, as shown in FIG. 3, when the baby stroller A1 is not in temporary use, it can be folded, which is convenient for carrying and temporary storage. In order to facilitate the temporary storage of the baby stroller A1 in the folded state, generally, the baby stroller A1 in the folded state can stand stably upright and is expected to occupy a small storage space. However, if the wheels A30 of the baby stroller A1 in the folded state are not locked, the wheels A30 are likely to slip and the baby stroller A1 in the folded state cannot stand stably upright.

[0082] The baby stroller A1 in this embodiment further includes a wheel orientation mechanism A10. The action of the wheel orientation mechanism A10 may be automatically triggered to rotate the wheel seat A32 to the locked position when the baby stroller A1 is in the folded state. In such a case, the baby stroller A1 in the folded state can be stabilized in an upright state convenient for temporary storage.

[0083] Hereinafter, the detailed structure of the wheel orientation mechanism in this embodiment will be described in detail with reference to FIGS. 4 to 9. FIGS. 4 to 6 correspond to the unfolded state of the baby stroller for children, and FIGS. 7 to 9 correspond to the folded state of the baby stroller for children. Specifically, FIG. 4 is a perspective view showing the wheel orientation mechanism according to this embodiment, FIG. 5 is an enlarged view showing part A in FIG. 4, FIG. 6 is an enlarged view showing part B in FIG. 4, FIG. 7 is a perspective view showing the wheel orientation mechanism according to this embodiment, FIG. 8 is an enlarged view showing part A in FIG. 7, and FIG. 9 is an enlarged view showing part B in FIG. 7.

[0084] The main components of the wheel orientation mechanism A10 in this embodiment include a drive part A100 and a lock part A200. The folding or unfolding of the baby stroller A1 for children automatically triggers the operation of the drive part A100. For example, the folding operation of the baby stroller A1 drives the drive part A100 to descend and also drives the lock part A200 to descend to the locked position. Further, when the baby stroller A1 is unfolded, the drive part A100 is triggered to move upward and also drives the lock part A200 to move to the unlocked position.

[0085] Based on the embodiment shown in FIG. 2, the drive part A100 is at least partially disposed, for example, at the pivot joint of the front legs A22, the rear legs A24, and the handle linkage part A26 of the frame A20, that is, at the position indicated by the circle Q1 in FIG. 2. However, of course, it is not limited thereto. Also, based on this embodiment, the lock part A200 is disposed, for example, at the pivot joint between the front leg A22 of the frame A20 and the wheel seat A32, that is, at the position indicated by the circle Q2 in FIG. 2. However, of course, it is not limited thereto.

[0086] As shown in FIGS. 6 and 9, the locking portion A200 mainly includes a locking pin A210 and a locking hole A220. The locking pin A210 can be moved downward into the locking hole A220 to achieve locking, or can be moved upward away from the locking hole A220 to release the locking. According to the embodiments shown in FIGS. 4 and 7, the locking hole A220 is disposed on the wheel seat A32 of the wheel A30. The wheel A30 may be, for example, a front wheel, and correspondingly, the wheel seat A32 may also be a front wheel seat, but of course, it is not limited thereto.

[0087] Hereinafter, with reference to FIGS. 4 and 5, the main structure of the driving portion A100 will be described in detail. The driving portion A100 mainly includes a driving member A110 and a trigger portion A120. The trigger portion A120 of the driving portion A100 is generally concave as a whole, but is not limited thereto. The trigger portion A120 is disposed at a pivot joint between the front leg A22, the rear leg A24, and the handle linkage portion A26 of the frame A20, and the trigger portion is adapted to rotate appropriately with respect to the front leg A22 via the pivot of the handle linkage portion A26. According to a preferred embodiment, the trigger portion A120 further includes a driving slope A121 and a concave curved surface A122. As exemplarily shown in FIGS. 5 and 8, the driving slope A121 is disposed on one side of the trigger member A120, for example, the left side shown in FIGS. 5 and 8, and the concave curved surface A122 is disposed adjacent to the driving slope A121 on the other side of the trigger member A120, for example, the right side shown in FIGS. 5 and 8.

[0088] The drive member A110 of the drive unit A100 further includes an end portion A111, a receiving groove A112, and an orientation groove A113. The end portion A111 is located at the end facing the trigger portion A120 of the drive member A110, the receiving groove A113 is located at the end away from the trigger portion A120 of the drive member A110, and the orientation groove A113 is located between the end portion A111 and the receiving groove A112. The end portion A111 of the drive member A110 abuts in cooperation with the trigger portion A120. Specifically, in the unfolded state shown in FIG. 5, the end portion A111 abuts against the concave curved surface A122 of the trigger portion A120, and in the folded state shown in FIG. 8, the end portion A111 abuts against the drive inclined surface A121 of the trigger portion A120. Since the concave curved surface A122 can form a larger accommodation space than the drive inclined surface A121, when the end portion A111 of the drive member A110 abuts against the concave curved surface A122, the drive member A110 is maximally received by the trigger portion A120, and the frame A20 of the baby stroller A1 for children corresponds to the unfolded position. Further, when the frame A20 of the baby stroller A1 for children corresponds to the folded state, the end portion A111 of the drive member A110 abuts against the drive inclined surface A121. When the frame A20 of the baby stroller A1 for children is in a completely folded state, the end portion A111 of the drive member A110 abuts against the edge on the side of the drive inclined surface A121 (for example, the left side of the drive inclined surface A121 shown in FIG. 8). At this time, the drive member A110 almost exits from the triggering portion A120.

[0089] Based on the above structure, the trigger part A120 rotates correspondingly with the folding and unfolding operations of the frame A20, and the driving member A110 rotates relative to the trigger part A120. According to an embodiment, for example, when the baby stroller A1 for children is folded from the unfolded position, the handle linkage part A26 rotates downward relative to the front leg A22, and by the operation of rotating downward, the trigger part A120 also rotates clockwise, and the end part A111 that was originally in contact with the concave curved surface A122 also slides counterclockwise along the trigger part A120. Finally, the end part A111 abuts against the driving inclined surface A121. Since the concave curved surface A122 can form a larger accommodation space than the driving inclined surface A121, when the end part A111 of the driving part A100 abuts against the driving inclined surface A121, the driving part A100 descends as a whole, that is, the trigger part A120 is triggered to automatically execute an operation by the folding operation of the baby stroller A1 for children. After that, the trigger part A120 biases the driving member A110 in the first direction S1. Finally, since the end part A111 abuts against the edge of one end of the driving inclined surface A121 when the baby stroller A1 for children is bent and folded, the driving member A110 substantially exits from the trigger part A120. The slide of the driving member A110 in the first direction S1 further triggers the operation of the lock part A200, and the lock pin A210 of the lock part A200 moves downward into the lock hole A220 to achieve locking, so that the wheel seat A32 at this position can be in the locked position.

[0090] Furthermore, when the handle linkage part A26 is rotated upward with respect to the front legs A22 as the baby stroller A1 for children is deployed from the folded position, the trigger part A120 is rotated counterclockwise accordingly by the upward rotation operation. At this time, the end part A111 contacting the drive slope A121 slides clockwise along the trigger part A120. Finally, the end part A111 contacts the concave curved surface A122. Since the concave curved surface A122 can provide a larger accommodation space than the drive slope A121, when the end part A111 contacts the concave curved surface A122, the drive member A110 moves upward as a whole. That is, by deploying the frame A20 of the baby stroller for children, the operation of the trigger part A120 is automatically triggered. Then, the trigger part A120 prompts the drive member A110 to slide upward along the second direction S2, and the drive member A110 can be accommodated in the trigger part A120 to the maximum extent. Moreover, the upward slide of the drive member A110 along the second direction S2 further triggers the operation of the lock part A200, and the lock pin A210 of the lock part A200 moves upward away from the lock hole A220 to achieve unlocking. Therefore, the wheel seat A32 at this position is in the unlocked position, and the wheels can rotate freely. The rotation of the trigger part A120 is automatically triggered through the folding and deploying operations of the baby stroller A1 for children, and the drive part A100 triggers the locked position and the unlocked position of the lock part A200.

[0091] According to a preferred embodiment, an inclination angle A111a is provided on the side surface of the end part A111 (as shown in FIG. 5) so as to avoid interference with the drive slope A121 when the drive member A110 is accommodated in the trigger part A120.

[0092] To smoothly slide the driving member A110 in the first direction S1 and the second direction S2, according to a preferred embodiment, the driving part A100 further includes a chute A140. The driving member A110 slides along the chute A140 in the first direction S1 or the second direction S2 based on the driving of the trigger part A120. The chute A140 further includes a fixing part A141 and an orienting part A142 therein. The fixing part A141 and the orienting part A142 are respectively arranged at two opposite ends of the chute A140.

[0093] According to the embodiment, the orienting part A142 in the chute A140 passes through the orienting groove A113 of the driving member A110. Therefore, during the process that the driving member A110 slides along the chute A140, relative sliding occurs between the orienting part A142 and the orienting groove A113, and the orienting part A142 can orient and guide the sliding of the driving member A110. The fixing part A141 arranged on the chute A140 is configured to fix a first reset member A130 described below.

[0094] To realize the interconnection between the driving part A100 and the locking part A200, a dragging part A300 is provided. As shown in FIGS. 4 and 7, the dragging part A300 includes a first end A310 and a second end A320. The first end A310 is connected to the driving part A100, and the second end A320 is connected to the locking part A200. According to the embodiment of the present application, the dragging part A300 is a steel wire, but is not limited thereto. Specifically, the first end A310 of the dragging part A300 is connected to the end of the trigger part A120 of the driving member A110 away from the trigger part A120, and the second end A320 of the dragging part A300 is connected to the end of the locking pin A210 away from the locking hole A220.

[0095] According to an embodiment, the wheel orientation mechanism A10 includes a guide portion A400. The guide portion A400 is disposed between the drive portion A100 and the lock portion A200, and the guide portion A400 includes a guide slot A410 (as shown in FIGS. 5 and 8). A part of the drag portion A300 between its first end portion A310 and its second end portion A320 extends along the guide slot A410 of the guide portion A400 so that the position of the drag portion A300 does not shift. According to the embodiment of the present application, the guide portion A400 can be disposed on the front leg A22.

[0096] According to a preferred embodiment of the present application, the wheel orientation mechanism A10 further includes a first reset member A130 and a second reset member A230. The first reset member A130 is disposed on the drive portion A100, and the second reset member A230 is disposed on the lock portion A200. For example, both the first reset member A130 and the second reset member A230 are elastic members (such as springs), but are not limited thereto. The elastic force of the first reset member A130 is greater than the elastic force of the second reset member A230.

[0097] Specifically, as shown in FIGS. 5 and 8, one end of the first reset member A130 is fixed to the fixing portion A141 of the chute A140, and the other end of the first reset member A130 is fixed to the drive member A110. Also, as shown in FIGS. 6 and 9, the second reset member A230 is fixedly disposed above the lock pin A210. Of course, it is not limited thereto. Rather, the second reset member A230 may be fixedly disposed below the lock pin A210. Further, a receiving groove for receiving the second reset member A230 may be provided to guide the movement of the second reset member A230 during compression and release.

[0098] When the baby stroller A1 for children starts to be folded from the unfolded state, the downward rotation of the handle linkage portion A26 with respect to the front leg A22 automatically triggers the trigger portion A120 to rotate clockwise, and the end portion A111 of the drive member A110 is driven to slide counterclockwise along the trigger portion A120. Finally, in the bent and folded state of the baby stroller A1 for children, when the end portion A111 abuts against the left edge of the drive slope A121, the drive member A110 is driven to slide in the first direction S1 (the state shown in FIG. 8). At this time, the first reset member A130 disposed on the drive portion A100 is compressed. Further, since the drive member A110 moves downward in the first direction S1, the drag portion A300 is released from the original tension state. As a result, the second reset member A230, which was originally in the compressed state, is also released from the compressed state. Thereby, the lock pin A210 is forced to move downward into the lock hole A220, and the wheel seat A32 rotated to this position is locked at this time. Therefore, corresponding to the baby stroller A1 for children in the folded position, the first reset member A130 is in the compressed state, and the second reset member A230 is in the released state.

[0099] When the baby stroller A1 for children starts to unfold from the folded state, the upward rotation of the handle linkage portion A26 relative to the front legs A22 triggers the trigger portion A120 to rotate counterclockwise automatically, and the end portion A111 of the drive member A110 is driven to slide clockwise along the trigger portion A120. Finally, the end portion A111 abuts against the concave curved surface A122 of the trigger portion A120. At this time, since the drive member A110 is maximally accommodated in the accommodation space formed by the concave curved surface A122 of the trigger portion A120, the drive member A110 rises along the second direction S2, and the first reset member A130 that was originally in a compressed state is released from the compressed state. At this time, the drive member A110 is further raised, the lock pin A210 is pulled up through the drag portion A300, and finally the lock pin A210 is pulled away from the lock hole A220, realizing the unlocking of the wheel seat A32, and the wheels can rotate freely. Since the elastic force of the first reset member A130 is greater than the elastic force of the second reset member A230, the second reset member A230 can be kept in a compressed state by the elastic force of the first reset member A130, thereby ensuring that the lock pin A210 can be kept at a position away from the lock hole A220. As can be seen from the above, corresponding to the baby stroller A1 in the unfolded position, the first reset member A130 is in a released state, and the second reset member A230 is in a compressed state.

[0100] The wheel orientation mechanism in this embodiment is arranged to rotatably lock the wheel seat of the wheels when the baby stroller for children is in a folded state, so that the folded baby stroller for children can be stably erected and stored, further reducing the storage space required by the folded baby stroller for children, and improving the convenience during the use of the baby stroller for children. Further, the wheel orientation mechanism in this embodiment can release the locked state of the wheel seat and allow the wheel seat to rotate freely when the baby stroller for children is in an unfolded state. The wheel orientation mechanism in this embodiment has a simple structure and convenient operation. The operation of the wheel orientation mechanism is automatically triggered by the folding of the frame, and the automatic rotation of the wheel seat can be locked without an additional wheel locking operation. In particular, when the frame is unfolded, the operation of the wheel orientation mechanism is automatically triggered, the lock of the wheel seat is automatically unlocked, and the wheels can rotate freely.

[0101] Second Embodiment: In the case of a baby stroller for children available in the current market, after being folded, the wheels are likely to rotate to an inappropriate position, making it difficult for the baby stroller for children to stand stably on the ground, which often causes inconvenience to consumers. As shown in FIG. 10, the second embodiment of the present application provides a baby stroller for children with a foldable frame. The baby stroller for children and the foldable frame can stand stably on the ground after being folded, which is convenient for consumers to place the baby stroller for children upright.

[0102] Specifically, as shown in FIGS. 10 and 28, the foldable frame includes a frame body B100, a wheel assembly B200, an orientation assembly B300, a drive assembly B400, and a drive wheel B500. As shown in FIGS. 10, 16, and 21, the frame body B100 includes two front leg support rods B110, two rear leg support rods B120, two handrail support rods B130, two foldable joints B140, two fixing members B150, and a pedal B160. The two front leg support rods B110, the two rear leg support rods B120, the two handrail support rods B130, the two foldable joints B140, and the two fixing members B150 are respectively arranged on two opposite sides of the frame body B100. In this embodiment, the pedal B160 is fixed to the lower ends of the two front leg support rods B110. Of course, in other embodiments, the pedal B160 may be connected between the two front leg support rods B110, or the pedal B160 may be omitted. Taking one side of the front leg support rod B110, the rear leg support rod B120, the handrail support rod B130, the foldable joint B140, and the fixing member B150 as an example, the front leg support rod B110 and the handrail support rod B130 are rotatably connected to each other via the foldable joint B140, and the rear leg support rod B120 is rotatably connected to the handrail support rod B130. The frame body B100 has a deployed state and a folded state. As shown in FIG. 10, when the foldable joint B140 is in the locked state, the front leg support rod B110 and the handrail support rod B130 are fixedly deployed relative to each other, that is, the frame body B100 is in the deployed state for use. As shown in FIG. 11, when the foldable joint B140 is in the unlocked state, the front leg support rod B110 and the handrail support rod B130 can be folded relative to each other until the front leg support rod B110, the rear leg support rod B120, and the handrail support rod B130 are substantially coincident or parallel, that is, the frame body B100 is in the folded state for storage. As shown in FIG. 16, the foldable joint B140 has a generally disk-shaped structure, and the fixing member B150 is arranged on the foldable joint B140 and is offset from the rotation center of the foldable joint B140.

[0103] Specifically, as shown in FIG. 10, the wheel assembly B200 includes a wheel seat B210 and a wheel body B220. The wheel seat B210 includes a connection seat 211 and a connection frame B212 connected to each other. As shown in FIG. 14, the connection seat 211 is substantially cylindrical, and a pivot hole B211a is provided at an end of the connection seat 211 away from the connection frame B212. The connection frame B212 includes two connection members B212a arranged opposite to each other, and both ends of the rotation axis of the wheel body B220 are rotatably connected to the two connection members B212 respectively. In this embodiment, the wheel seat B210 has an integral structure. Of course, in other embodiments, the wheel seat B210 may also be formed by connecting the connection seat 211 and the connection frame B212 independent of each other.

[0104] In this embodiment, as shown in FIGS. 12 to 14, two rotation axes B111 are provided at intervals at the lower end of the pedal B160, and two wheel assemblies B200 are provided. The two rotation axes B111 are rotatably inserted into the pivot holes B211a of the two connection seats 211 of the two wheel assemblies B200 respectively. Of course, in an embodiment where the pedal B160 is connected between the two front leg support rods B110 or in an embodiment where the pedal B160 is omitted, the two rotation axes B111 may also be arranged at the lower ends of the two front leg support rods B110. Furthermore, the non-steerable drive wheel B500 is fixed to the lower ends of the two rear leg support rods B120. Of course, in other embodiments, the rotation axis B111 may also be fixed to the connection seat 211 of the wheel assembly B200 and rotatably connected to the lower end of the pedal B160. Furthermore, in other embodiments, the wheel assembly B200 may also be provided at the lower ends of the rear leg support rods B120.

[0105] Specifically, as shown in FIGS. 14 and 27 to 30, the alignment assembly B300 includes an alignment element B310, an alignment groove B320, and a first reset member B330. In this embodiment, the alignment element B310 is movably disposed on the frame body B100. In this embodiment, the alignment element B310 is movably disposed on the pedal B160, and the alignment element B310 may move so as to protrude from the bottom surface of the pedal B160. The alignment assembly B310 is, for example, an alignment pin B310' as shown in FIG. 22. Further, as shown in FIGS. 28 and 30, a contact pressing element B311 is fixed to the side surface of the alignment pin B310', and the contact pressing element B311 is, for example, a contact pressing pin B311'. As shown in FIG. 14, the alignment groove B320 is disposed at a position different from the pivot hole B211a in the connection sheet 211, for example, at a position offset from the rotation center of the wheel sheet B210. The alignment pin B310' can be inserted into the alignment groove B320 when the connection sheet 211 rotates to a preset position with respect to the front leg support rod B110, that is, when the alignment pin B310' rotates to a position facing the alignment groove B320. In this embodiment, as shown in FIG. 41, a chamfer structure B312 is provided at the end of the alignment pin B310' that is inserted into the alignment groove B320, and the alignment groove B320 has a flare structure, that is, the inner diameter near the open end of the alignment groove B320 is larger than the inner diameter near the lower end. Such an arrangement may facilitate the insertion of the alignment pin B310' into the alignment groove B320. Both ends of the first reset member B330 are in contact with the pedal B160 and the alignment pin B310' respectively, and the first reset member B330 always moves the alignment pin B310' in a direction close to the wheel sheet B210. Optionally, the first reset member B330 is a spring.

[0106] Specifically, as shown in FIGS. 28, 30, and 36, the drive assembly B400 includes a drive member B410, a drag portion (i.e., a drag member) B420, and a second reset member B430. In this embodiment, the drive member B410 is rotatably disposed on the pedal B160. Specifically, the drive member B410 includes a turntable B411, and a transmission tooth B412 and a drive tooth B413 spaced apart on the turntable B411. In this embodiment, the drive member B410 has an integral structure. Of course, in other embodiments, the drive member B410 can also be formed by connecting the turntable B411, the transmission tooth B412, and the drive tooth B413 that are independent of each other. The transmission tooth B412 is disposed on the side of the wheel seat B210 of the contact pressing pin B311' that is close, that is, on the lower side of the contact pressing pin B311'. In this embodiment, the drag portion B420 is a steel wire. As shown in FIGS. 18 to 20, one end of the drag portion B420 is connected to the fixing member B150, and as shown in FIGS. 28 and 30, the other end of the drag portion B420 is connected to the turntable B411, and moreover, the connection point between the drag portion B420 and the turntable B411 is offset from the rotation center of the turntable B411. As shown in FIG. 10, when the frame body B100 is in the deployed state, the drag portion B420 is tightened. As shown in FIG. 11, the frame body B100 is in the folded state and the drag portion B420 is in the loosened state.

[0107] Further, as shown in FIGS. 28 and 30, the drive member B410 has a first rotational position and a second rotational position. As shown in FIG. 28, when the drag portion B420 is tightened, the drive member B410 rotates to the first rotational position and pushes the orientation pin B310' in a direction away from the wheel seat B210 until the drive tooth B412 moves away from the orientation groove B320. As shown in FIG. 28, when the drag portion B420 of the drive member B410 is loosened, it rotates to the second rotational position without pushing the orientation pin B310' in a direction away from the wheel seat B210. As shown in FIG. 36, both ends of the second reset member B430 are in contact with the pedal B160 and the turntable B411 respectively, and the second reset member B430 always rotates the drive member B410 to the second rotational position.

[0108] Furthermore, as shown in FIGS. 28 and 30, a plurality of tooth grooves B211b that cooperate with the drive teeth B413 are provided in an annular shape on the surface of the connection sheet 211 facing the pedal B160. When the drive member B410 rotates, the drive teeth B413 can abut against the groove walls of any corresponding tooth groove B211b to drive the wheel sheet B210 to rotate. As shown in FIGS. 24 to 26, when the drive teeth B413 are inserted into any tooth groove B211b, the drive teeth B413 abut against one surface of the tooth groove B211b and have a gap with the other surface. Therefore, the drive teeth B413 do not get stuck in a specific tooth groove B211b. After the rotation of the drive member B410, the drive teeth B413 abut against the groove walls of different tooth grooves B211b, thereby driving the wheel sheet B210 to rotate. There are various methods for providing a gap between the drive teeth B413 and the tooth grooves B211b. For example, as shown in FIG. 25, the maximum width W1 of the tooth groove B211b may be set to be larger than the maximum width W2 of the portion where the drive teeth B413 are inserted into the tooth groove B211b. Alternatively, as shown in FIG. 26, the drive teeth B413 can include a first hypotenuse B413a and a second hypotenuse B413b that are arranged at an included angle. The first hypotenuse B413a or the second hypotenuse B413b may abut against the groove wall of any corresponding tooth groove B211b, and the inclination angle θ1 of the first hypotenuse B413a is larger than the inclination angle θ2 of the second hypotenuse B413b, or the inclination angle θ1 of the first hypotenuse B413a is smaller than the inclination angle θ2 of the second hypotenuse B413b. Therefore, a gap is generated between the first hypotenuse B413a or the second hypotenuse B413b and the groove wall of any corresponding tooth groove B211b, and there is a possibility that the wheel sheet B210 rotates when the first hypotenuse B413a or the second hypotenuse B413b presses the groove walls of different tooth grooves B211b. Also, the central angle of the annular region of the plurality of tooth grooves B211b may be 90° to 360°. In this embodiment, as shown in FIG. 14, the central angle θ3 of the annular region of the plurality of tooth grooves B211b is 30° to 180°, that is, the central angle θ3 from the tooth groove B211b of "M" to the tooth groove B211b of "N" is 30° to 180°, and the wheel sheet B210 rotates until the orientation pin B310' faces the orientation groove B320.In some embodiments, the central angle θ3 of the annular region of the plurality of tooth grooves B211b is 106°, that is, the central angle θ3 from the tooth groove B211b of "M" to the tooth groove B211b of "N" is 106°. In other words, when the foldable frame is in the folded state, under the cooperative drive of the drive tooth B413 and the tooth groove B211b, the wheel seat B210 can automatically rotate up to 106°. For example, taking the wheel assembly B200 close to the left front leg support rod B110 as an example, the wheel assembly B200 is rotated from the state facing the left rear of the pedal B160 shown in FIG. 31 to the state facing the left front of the pedal B160 shown in FIG. 32. At this time, if the wheel seat B210 has not yet been rotated so that the orientation pin B310' faces the orientation groove B320, the wheel seat B210 can be rotated by its own folding inertia or an external force so that the orientation pin B310' faces the orientation groove B320.

[0109] In another embodiment, as shown in FIGS. 38 and 39, the drive tooth B413 and the tooth groove B211b can also be omitted, and the wheel seat B210 can be purely rotated by the inertia of the wheel seat B210 itself or an external force so that the orientation pin B310' faces the orientation groove B320.

[0110] In a further embodiment, as shown in FIGS. 40 to 45, all of the drive teeth B413, the tooth groove B211b, the drive member B410, and the second reset member B430 can be omitted. At this time, one end of the drag portion B420 is connected to the fixing member B150 of FIG. 16, and the other end is directly connected to the alignment pin B310'. The drag portion B420 is tightened so that the alignment pin B310 is always located at a position away from the wheel seat B210 when the frame body B100 is in the deployed state. Further, the drag portion B420 is loosened when the frame body B100 is in the folded state, and the alignment pin B310 moves in a direction closer to the wheel seat B210 by the action of the first reset member B330. In this embodiment, the front leg support rod B110 includes an inclined portion B112 and a vertical portion B113 connected to each other, and an end of the vertical portion B113 away from the inclined portion B112 is rotatably connected to the wheel seat B210 via a rotation shaft B111. An inner plug member B114 is disposed inside the inclined portion B112, and a pulley B115 is disposed on the inner plug member B114. In this embodiment, the pulley B115 is disposed substantially at the connection portion between the inclined portion B112 and the vertical portion B113. One end of the drag portion B420 is connected to the fixing member B150, and the other end passes through the inner plug member B114 and wraps around the pulley B115 to be connected to the alignment pin B310'. That is, the portion of the drag portion B420 located inside the inclined portion B112 is obliquely disposed along the same direction as the inclined portion B112, and the portion of the drag portion B420 located inside the vertical portion B113 is vertically disposed along the same direction as the vertical portion B113 after rounding the pulley B115 and changing the direction, that is, this portion of the drag portion B420 is disposed in the same direction as the alignment pin B310'. In this way, the alignment pin B310' can be pulled along the vertical direction so as to make the force applied to the alignment pin B310' more uniform. Of course, in other embodiments, the pulley B115 or the inner plug member B114 can also be omitted. Further, the drive assembly B400 may further include a sheath B440. The sheath B440 is sleeved on the portion of the drag portion B420 located inside the inclined portion B112, provides a receiving channel for the drag portion B420, and at the same time plays a role in protecting the drag portion B420.

[0111] The following specifically describes the usage process of the foldable frame.

[0112] As shown in FIG. 10, when the foldable frame is in the deployed state, the drag portion B420 is tightened, and the drag portion B420 pulls the drive member B410 to bring the drive member B410 to the first rotational position. The transmission teeth B412 on the drive member B410 abut against the side of the wheel seat B210 of the contact pressing pin close to it, that is, abut against the lower side of the contact pressing pin B311' close to the lower side of the wheel seat B210. Thereby, the orientation pin B310' separates from the orientation groove B320, and the wheel seat B210 can rotate freely with respect to the pedal B160 and the front leg support rod B110, which is convenient for freely maneuvering while pushing the baby stroller for children as shown in FIG. 28.

[0113] When the foldable frame is in the folded state, as shown in FIG. 11, the folding joint B140 is rotated so that the position of the fixing member B150 approaches the wheel seat B210. As shown in FIGS. 15 to 20, after the originally tightened drag portion B420 is loosened and the pulling effect on the drive member B410 is lost, the drive member B410 rotates in the counterclockwise direction shown in FIG. 28 toward the second rotational position under the action of the second reset member B430. During the rotation process of the drive member B410, the drive teeth B413 are sequentially pressed against the groove walls of different tooth grooves B211b so as to drive the wheel seat B210 to rotate along the F1 direction shown in FIG. 28. On the other hand, during the rotation process of the drive member B410, the transmission teeth B412 no longer Without pressing, after the abutting pressing pin B311' loses the pressing action on the transmission gear B412, the abutting pressing pin B310' moves in a direction approaching the wheel seat B210 under the action of the first reset member B330. When the driving member B410 is rotated to the second rotation position, the orientation pin B310' is inserted into the orientation groove B320 and faces the orientation groove B320. As shown in FIG. 30, the wheel assembly B200 and the frame body B100 are relatively fixed at a predetermined position. At the predetermined position, since the foldable frame in the folded state can stand stably on the ground, it is easy for the consumer to place it vertically. Furthermore, since the wheel assembly B200 and the transmission wheel B500 respectively connected to the front leg support rod B110 and the rear leg support rod B120 partially or completely coincide, a large amount of storage space can be saved.

[0114] The baby stroller for children and the foldable frame have at least the following technical effects.

[0115] In the foldable frame, when the frame body B100 is in the unfolded state, the orientation assembly B300 is unlocked, and the wheel assembly B200 can rotate relative to the frame body B100, thereby facilitating the steering of the foldable frame. The drive assembly B400 may drive to lock the orientation assembly B300 when the frame body B100 is in the folded state. Thereby, the wheel assembly B200 and the frame body B100 may be relatively fixed at a predetermined position, for example, the position where the wheel assembly B200 is located when the foldable frame moves straight forward. Thereby, the foldable frame in the folded state can stand stably on the ground, and thus it is easy for the consumer to place it vertically, and a large amount of storage space can be saved.

[0116] Third Embodiment: In this embodiment as well, a baby stroller for children will be described as an example. However, the wheel orientation mechanism in this embodiment can also be used for other children's devices that require locking the wheels, such as a high chair, and can also be used for other devices such as a wheelchair for the disabled.

[0117] Also, the wheel orientation mechanism C10 in this embodiment is arranged such that when the baby stroller C1 for children is in the folded state, the wheel seat C32 of the wheel C30 can be rotationally locked. Therefore, the folded baby stroller C1 for children can be stably stood up and stored, and the convenience during the use of the baby stroller C1 for children can be improved. Further, the wheel orientation mechanism C10 in this embodiment may unlock the locked state of the wheel seat C32 so that the wheel C30 can rotate freely when the baby stroller C1 for children is in the unfolded state.

[0118] Hereinafter, the baby stroller C1 in this embodiment will be described with reference to FIGS. 46 and 47. FIG. 46 is a schematic view showing the baby stroller C1 in another embodiment of the present application. The baby stroller C1 shown in FIG. 46 is in an unfolded state. FIG. 47 is a schematic view showing the baby stroller C1 in another embodiment of the present application. The baby stroller C1 shown in FIG. 47 is in a folded state. The baby stroller C1 in this embodiment includes a frame C20 and wheels C30. The frame C20 includes front legs C22, rear legs C24, and a handlebar assembly. As shown in FIG. 46, the rear leg C24 is provided with a pivot joint T. The lower end of the pivot joint T is rotated to the front leg C22 of the frame, and the upper end is rotated to the handlebar assembly of the frame. According to one embodiment, the pivot joint T is in a T shape and is in the orientation as shown in FIG. 46. The lower left end of the pivot joint T is connected to the front leg C22, the lower right end of the pivot joint T is connected to the rear leg C24, and the upper right end of the pivot joint T is connected to the handlebar assembly. Therefore, the handlebar assembly, the front leg C22, and the rear leg C24 are rotatably connected at the pivot joint T. When the handlebar assembly, the front leg C22, and the rear leg C24 are folded relative to each other and not temporarily used, the volume of the baby stroller C1 may be reduced. Of course, it is not limited thereto. The handlebar assembly may include a handle linkage portion C26. Correspondingly, the handle linkage portion C26, the front leg C22, and the rear leg C24 are rotatably connected to each other at the pivot joint T, and the upper right end of the pivot joint T is connected to the handle linkage portion C26. The wheels C30 usually include a set of front wheels and a set of rear wheels, and each wheel includes a wheel seat C32. The front leg C22 of the baby stroller C1 is connected to the wheel seat of the front wheel, and the rear leg C24 of the baby stroller C1 is connected to the wheel seat of the rear wheel. In the following description, the case where the lock portion C200 of the wheel alignment mechanism C10 is provided on the front wheel will be described as an example, but it is not limited thereto.

[0119] Next, the wheel orientation mechanism C10 in this embodiment will be described with reference to FIGS. 48 and 49. FIG. 48 is a schematic diagram showing the wheel orientation mechanism C10 according to the present application, and the drive guide portion C100 and the lock portion C200 of the wheel orientation mechanism C10 are shown. The baby stroller C1 shown in FIG. 48 is in an unfolded state. FIG. 49 is a schematic diagram showing the wheel orientation mechanism C10 in the present application, the drive guide portion C100 and the lock portion C200 of the wheel orientation mechanism C10 are shown in FIG. 49, and the baby stroller C1 shown in FIG. 49 is in a folded state. The wheel orientation mechanism C10 in this embodiment mainly includes a drive guide portion C100, a lock portion C200, and a drag portion C300 that connects the drive guide portion C100 and the lock portion C200. As shown in FIG. 48, the drag portion C300 includes a first end portion C310 and a second end portion C320. The first end portion C310 of the drag portion C300 is connected to the handle linkage member C26, and the second end portion C320 of the drag portion C300 is connected to the lock member C210 of the lock member C200. By folding and unfolding the handlebar assembly with respect to the front leg C22, corresponding operations of the lock member C210 can be caused via the drag portion C300.

[0120] Specifically, in the embodiment shown in FIGS. 48 to 50, the drive guide portion C100 includes a pulley set C110 and a guide post set C120. The pulley set C110 and the guide post set C120 are arranged along the movement path of the drag portion C300. More specifically, the pulley set C110 further includes a first pulley C112 and a second pulley C113, and the guide post set C120 further includes a first guide post C122 and a second guide post C123. As shown in FIGS. 48 and 49, the first end C310 of the drag portion C300 passes through the first pulley C112, the first guide post C122, the second guide post C123, and the second pulley C113 in sequence and is then connected to the handle linkage portion C26. Of course, other winding methods of the drag portion C300 are also possible. In the embodiment shown in FIGS. 48 and 49, the first pulley C112 and the second pulley C113 are respectively disposed above and below the pivot joint T, and the first guide post C122 and the second guide post C123 are also respectively disposed above and below the pivot joint T. The first pulley C112 is disposed at the pivot connection portion between the pivot joint T and the front leg C22, and the second pulley C113 is disposed at the pivot connection portion between the pivot joint T and the handle linkage portion C26. The distance between the first guide post C122 and the second guide post C123 in the extending direction of the front leg C22 is smaller than the distance between the first pulley C112 and the second pulley C113 in the extending direction of the front leg C22. The first end C310 of the drag portion C300 passes through the lower edge of the first pulley C112, the upper edge of the first guide post C122, the upper edge of the second guide post C123, and the lower edge of the second pulley C113 in sequence and is then connected to the handlebar assembly. Therefore, the drag portion C300 may be loosened when the handlebar assembly is folded with respect to the front leg C22, and the drag portion C300 may be tightened when the handlebar assembly is deployed with respect to the front leg C22.Note that the present application is not limited to the arrangement of the pulley set C110 and the guide post set C120 shown in the above embodiment, and other arrangements are possible as long as the drag portion C300 can be loosened or tightened by folding and unfolding the handlebar assembly with respect to the front leg C22.

[0121] According to an embodiment of the present application, both the first pulley C112 and the second pulley C113 are fixed pulleys, and both the first guide post C122 and the second guide post C123 are fixed posts. Of course, the first pulley C112, the second pulley C113, the first guide post C122, and the second guide post C123 may all be fixed pulleys, or may all be fixed posts, and the drag portion C300 is a steel wire.

[0122] Next, the detailed structure of the locking portion C200 will be described with reference to FIGS. 50, 51, and 52. FIG. 50 is a schematic view showing the portion "E" of FIG. 48 from another angle. FIG. 51 is a schematic view showing the rotating portion C230 and the locking hole C240 in the embodiment of the present application. FIG. 52 is a schematic view showing the locking portion C200 in the embodiment of the present application. Referring back to FIG. 48, the second end portion C320 of the drag portion C300 is connected to the locking member C200 shown in the portion "E" of FIG. 48, and FIG. 50 is a schematic view showing the portion "E" from another perspective. The locking member C200 mainly includes a locking member C210 and a locking hole C240, and the locking member C210 can enter and exit the locking hole C240. Referring to FIG. 51, the locking portion C200 further includes a rotating portion C230 and an elastic member C220. The elastic member C220 abuts against the locking member C210 and pushes the locking member C210 to drop the locking member C210 when the frame C20 is folded. After the locking member C210 drops, the locking member C210 contacts the rotating portion C230 and pushes the rotating portion C230 so that the locking hole C240 rotates to align with the locking member C210 and lock. According to the embodiment, the locking member C210 is locked in the locking hole C240 after the wheel rotates 180° through the rotating portion C230. However, the present application is not limited to the above rotation angle. Rather, the rotation angle of the wheel C30 can be set according to actual requirements. Both the rotating portion C230 and the locking hole C240 are arranged on the end face C321 of the wheel seat C32 of the wheel C30 facing the frame C20 side. According to the embodiment shown in FIG. 51, the rotating portion C230 is a helical surface of the wheel C30, and the locking hole C240 is also arranged on the end face C321 of the wheel seat C32. The lowest point of the helical surface is arranged at an interval from the locking hole C24. For example, the locking hole C240 is located below the lowest point of the helical surface. According to the embodiment, a stepped surface is arranged between the lowest point of the helical surface and the locking hole C240. Therefore, as shown in FIG. 52, when the locking member C210 abuts against the rotating portion C230, if the locking member C210 moves downward along the rotating portion C230 forming the helical surface, the locking member 210 exerts a tangential force on the rotating portion C230 along the helical surface, whereby the wheel seat C32 and the wheel C30 can rotate together.According to the embodiment shown in FIG. 51, after rotating at an angle, the lock member C210 continues to move downward so as to be inserted into the lock hole C240.

[0123] Hereinafter, the operations of the drive guide portion C100 and the lock portion C200 during the deployment operation of the baby stroller C1 in this embodiment will be described with reference to FIGS. 48 to 53. FIG. 53 is a schematic diagram showing different positional relationships of the lock portion C200 when the baby stroller C1 in this embodiment is in the deployed state and the folded state. The first end portion C310 of the drag portion C300 is sequentially tightened around the lower edge portion of the first pulley C112, the upper edge portion of the first guide post C122, the upper edge portion of the second guide post C123, and the lower edge portion of the second pulley C113 when the handlebar assembly is in the deployed state with respect to the front leg C22. Then, the second end portion C320 of the drag portion C300 correspondingly pulls up the lock member C210 to separate it from the lock hole C240. Further, the pulling-up operation of the lock member C210 compresses the elastic member C220 connected to the lock member C210. In such a state, the wheel C30 can rotate freely without any hindrance, and the baby stroller C1 can be easily pushed.

[0124] Next, the operation of the drive guide portion C100 and the lock portion C200 during the folding operation of the baby stroller C1 in this embodiment will be described with reference to FIGS. 49 and 53. As shown in FIG. 49, when the handle assembly is folded with respect to the front legs C22, the arc length of the first end C310 of the drag portion C300 that abuts against the first pulley C112 and the second pulley C113 becomes shorter, and the drag portion C300 loosens. At this time, the second end C320 of the drag portion C300 receives the drive of the elastic member C220 and moves the lock member C210 downward. The lock member C210 that has moved downward presses the rotating portion C230 having a spiral surface, whereby the wheel C30 rotates accordingly. After the wheels rotate at an angle so that the front wheels are substantially parallel to the rear wheels, the lock member C210 continues to move downward and is inserted into the lock hole C240, locking the wheel seat C32 and locking the wheel C30, so that the baby stroller C1 in the folded state can stand stably.

[0125] The pulley set C110 and the guide post set C120 in this embodiment can also realize the guide of the drag portion C300, and the folding operation and the unfolding operation can be performed more smoothly and stably.

[0126] The wheel orientation mechanism C10 in this embodiment is arranged to rotationally lock the wheel seat C32 of the wheel C30 in the folded state of the baby stroller C1, and the baby stroller C1 in the folded state can be stably stood and stored, so that the convenience during the use of the baby stroller can be improved. Further, the wheel orientation mechanism C10 according to this embodiment can release the locked state of the wheel seat C32 in the unfolded state of the baby stroller C1, so that the wheel C30 can rotate freely without obstacles, which is convenient for pushing the baby stroller C1.

[0127] Fourth Embodiment: The configuration of the baby stroller D1 according to the fourth embodiment is the same as that of the baby stroller C1 according to the third embodiment. Therefore, only the differences from the third embodiment will be described below, and the same content will not be described repeatedly.

[0128] Hereinafter, referring to FIGS. 54 and 55 for explanation, FIG. 54 is a schematic perspective view showing the baby stroller D1 in the fourth embodiment of the present application, and FIG. 55 is an enlarged schematic perspective view showing a part "M" of the baby stroller D1 in FIG. 54. The wheel orientation mechanism D10 in this embodiment includes a drive part D100, a lock part D200, and a drag part D300. The lock part D200 includes a lock member D210 and a lock hole D240. The drag part D300 includes a first end D310 and a second end D320. The first end D310 is connected to the drive part D100, and the second end D320 is connected to the lock member D210. The drag part D300 moves to the second position by the drive part D100 along with the unfolding operation of the frame D20 so that the lock member D210 comes out of the lock hole D240 and is unlocked. The drag part D300 moves to the first position by the drive part D100 along with the folding operation of the frame D20. The lock member D210 is inserted into the lock hole D240 and locked when the drag part D300 is in the first position, and the lock member D210 is separated from the lock hole D240 and unlocked when the drag part D300 is in the second position.

[0129] As shown in FIGS. 54 and 55, the drive unit D100 in this embodiment includes a push member D110 (shown in FIG. 57) and a slide member D120 (shown in FIG. 58). According to the illustrated embodiment, the push member D110 is provided at the folding pivot joint of the frame D20, and the slide member D120 is also provided at the folding pivot joint of the frame D20. For example, the push member D110 is disposed on the front leg D22 of the frame D20, and the slide member D120 is disposed on the rear leg D24 of the frame D20, but is not limited thereto. The push member D110 rotates correspondingly with the deployment or folding operation of the frame D20, and the slide member D120 linearly reciprocates in the biasing direction by the pushing of the push member D110.

[0130] Specifically, the following description will be made with reference to FIGS. 56 and 57. FIG. 56 is another schematic view showing the baby stroller D1 in the fourth embodiment of the present application, and FIG. 57 is an enlarged schematic view showing a portion "N" of the baby stroller D1 in FIG. 56. As shown in FIG. 57, the push member D110 includes a pivot portion D112, a contact pressing portion D114, and a perforated portion D116. The push member D110 rotates counterclockwise or clockwise (with respect to FIG. 57) about the pivot portion D112 when the frame D20 is deployed or folded. At the end of the push member D110, a contact pressing portion D114 protruding outward is disposed, and a perforated portion D116 is disposed adjacent to the pivot joint D112.

[0131] Further, refer to FIG. 58. FIG. 58 is an enlarged schematic view showing the structure of the slide member D120 in the embodiment of the present application. The slide member D120 includes a slide portion D122, a protruding end portion D124, and a receiving hole D126. The slide portion D122 is constantly in contact with and supported by the tube of the rear leg, and slides along the tube of the rear leg when the slide member linearly moves. The protruding end portion D114 of the push member D110 abuts against the protruding end portion D124 of the slide member D120. Thus, when the push member D110 rotates, the slide member D120 linearly reciprocates in the extending direction of the rear leg D24. The first end of the drag portion D300 is fixed to the receiving hole D126, and the position of the drag portion D300 can be changed along with the linear movement of the slide member D120. After the first end portion D310 of the drag portion D300 is fixed to the receiving hole D126, the other end of the drag portion D300, that is, the second end portion D320, surrounds the pivot portion D112, enters the front leg D22 of the frame through the perforation portion D116, and the second end portion D320 of the drag portion D300 is finally connected to the locking member D210 of the locking portion D200. Therefore, when the drag portion D300 moves to its second position or its first position, the locking member D210 can move away from or enter the locking hole D240. According to one of the embodiments, a guide groove is provided in the pivot portion D112, the second end portion D320 of the drag portion D300 surrounds the guide groove, enters the front leg D22 of the frame through the perforation portion D116, and is finally connected to the locking member D210.

[0132] Next, with reference to FIG. 59, which is an enlarged schematic view showing the structure of the lock portion D200 according to the embodiment of the present application, the detailed structure of the lock portion D200 will be described. The lock portion D200 includes not only a lock member D210 and a lock hole D240, but also an elastic member D220 and a rotating portion D230. The elastic member D220 can abut against the lock member D210 and push it down when the frame D20 is folded. According to one embodiment, the elastic member D220 is a biasing spring and a push spring. When the drag portion D300 moves downward and moves to the first position, the elastic member D220 applies a pressing force to the lock member D210 to drop the lock member D210, and after the lock member D210 drops so that the lock hole D240 is aligned with the lock member D210 for locking, it can abut against and push the rotating portion D230. According to the illustrated embodiment, both the rotating portion D230 and the lock hole D240 are located on the end face D321 of the wheel seat D32. The rotating portion D230 is a helical surface disposed on the end face D321, and according to a preferred embodiment, the lock hole is disposed at the lowest point of the helical surface. The lock member D210 can rotate clockwise or counterclockwise along the helical surface to reach the lowest point for entering the lock hole D240. When the frame is unfolded from the folded state, after the lock member D210 exits the lock hole D240, it can also rotate clockwise or counterclockwise along the helical surface from the lowest point until it leaves the lock hole D240. According to the embodiment shown in FIG. 59, at least one groove D232 is provided on the helical surface, reducing its total weight.

[0133] Hereinafter, the operation mode of the lock member D210 along the rotating part D230 will be described in detail with reference to FIGS. 60 and 61. FIG. 60 is an enlarged schematic view showing the structure of the lock part D200 according to the embodiment of the present application, and shows the state where the lock part D200 is in the unlocked state before rotation. FIG. 61 is an enlarged schematic view showing the structure of the lock part D200 according to the embodiment of the present application, and shows the state where the lock part D200 is in the locked state after rotation. As shown in FIG. 60, at this time, the drag part D300 is in a state of being pulled upward, the elastic member D220 is compressed by the lock member D210, and the lock member D210 is located at a high position of the spiral surface. According to a preferred embodiment, the lock member D210 is arranged at the highest position of the spiral surface. As shown in FIG. 61, when the drag part D300 is in a state of being pushed downward, the lock member D210 reaches the position of the lock hole D240, and rotates and falls along the spiral surface until it enters the lock hole D240 and is locked under the biasing force and pressing force of the elastic member D220. In this process, the lock member D210 simultaneously abuts against the wheel seat D32 along the spiral surface and can push the wheel seat D32, so that the wheel D30 also rotates accordingly. According to a preferred embodiment, the lock hole D240 is located at the lowermost part of the spiral surface. Of course, other position arrangements are also possible, that is, the position of the lock hole D240 may be arranged according to the required rotation angle of the wheel D30.

[0134] Next, with reference to FIGS. 62 and 63, the cooperation mode of the drive unit D100, the lock unit D200, and the drag unit D300 will be described generally. FIG. 62 is an enlarged schematic view showing a state in which the drive unit D100 and the lock unit D200 cooperate according to an embodiment of the present application. Here, the baby stroller D1 for children is in an unfolded state. FIG. 63 is an enlarged schematic view showing a state in which the drive unit D100 and the lock unit D200 cooperate according to an embodiment of the present application. Here, the baby stroller D1 for children is in a folded state. In the unfolded state shown in FIG. 62, since the substantially pushing portion D114 of the push member D110 abuts on the protruding end portion D124 of the slide member D120, the slide member D120 descends along the extending direction of the rear leg D24, pulling the drag unit D300 upward to move the drag unit D300 to the second position. Accordingly, the lock member D210 of the lock unit D200 is pulled, and the lock member D210 moves upward away from the lock hole D240, and in the process, the elastic member D220 is compressed. Further, in the folded state of FIG. 63, with the folding of the frame D20, for example, the folding of the front leg D22, the rear leg D24, and the handlebar assembly relative to each other, the abutting pressing portion D114 of the push member D110 rotates clockwise, thereby separating from the substantial pressing of the protruding end portion D124 of the slide member D120, and the slide member D120 moves upward along the extending direction of the rear leg D24, and accordingly, the drag unit D300 may move downward. When the drag unit D300 is in the first position, the lock member D210 descends under the pressing force of the elastic member D220, and the descending lock member D210 moves along the spiral surface until the lock member D210 enters the lock hole D240, rotating the wheel seat D32 and the wheel D30 simultaneously. Such rotation of the lock member D210 may be clockwise or counterclockwise, and correspondingly, the spiral surface may be arranged clockwise or counterclockwise from the high point to the low point of the end surface D321.

[0135] When the frame D20 is deployed again, the contact pushing part D114 of the push member D110 rotates counterclockwise. Therefore, it contacts and pushes the protruding end part D124 of the slide member D120 again, and the slide member D120 descends along the extending direction of the rear leg D24. Thereby, the drag part D300 is pulled upward, and the drag part D300 pulls the locking member D210 of the locking member D200 accordingly. As a result, the locking member D210 moves upward away from the locking hole D240. The upward movement of the locking member D210 can be performed by rotating clockwise or counterclockwise along the spiral surface of the rotating part D230 until it returns to the higher position of the spiral surface.

[0136] According to this embodiment, when the frame D20 is folded, along with the fall of the locking member D210, the locking member D210 rotates along the spiral surface until it falls into the locking hole D240. At this time, the fallen locking member D210 contacts the wheel seat D32 and is biased to rotate together with the wheel D30. Therefore, when the frame D20 is folded, the wheel D30 can be rotated forward, the interference between the frame D20 and, for example, a crossbar can be avoided, and the frame D20 can be folded smoothly. Note that the wheel D30 in this embodiment may be a front wheel, but is not limited thereto.

[0137] Since it can be embodied in various forms without departing from the features of the present application, the above-described embodiment is not particularly limited to the above-described details unless otherwise specified, and should be broadly construed as being included in the scope defined by the appended claims. Therefore, it should also be understood that all modifications and changes included in the scope of the claims or an equivalent scope thereof should be covered by the appended claims.

Description of Reference Numerals

[0138] First Embodiment: Baby stroller for children: A1 Frame: A20 Front leg: A22 Rear leg: A24 Handle linkage part: A26 Wheel: A30 Wheel seat: A32 Wheel orientation mechanism: A10 Drive part: A100 Drive member: A110 End: A111 Receiving groove: A112 Orientation groove: A113 Inclination angle: A111a Trigger part: A120 Drive slope: A121 Concave curved surface: A122 First reset member: A130 Shoot: A140 Fixing part: A141 Orientation part: A142 Lock part: A200 Lock pin: A210 Lock hole: A220 Second reset member: A230 Drag part: A300 First end: A310 Second end: A320 Guide part: A400 Guide slot: A410 First direction: S1 Second direction: S2 Circle: Q1 Circle: Q2 Part: A Part: B Second embodiment: B100: Frame body B110: Front leg support rod B111: Rotation axis B112: Inclined part B113: Vertical part B114: Inner bolt member B115: Pulley B120: Rear leg support rod B130: Handrail support rod B140: Foldable joint B150: Fixed member B160: Pedal B200: Wheel assembly B210: Wheel seat B211: Connection seat B211a: Pivot hole B211b: Tooth groove B212: Connection frame B212a: Connection member B220: Wheel body B300: Orientation assembly B310: Orientation element B310': Orientation pin B311: Contact pressing element B311': Contact pressing pin B312: Chamfered structure B320: Orientation groove B330: First reset member B400: Drive assembly B410: Drive member B411: Turntable B412: Transmission teeth B413: Drive teeth B413a: First hypotenuse B413b: Second hypotenuse B420: Drag part B430: Second reset member B440: Sheath B500: Drive wheel Third Embodiment: Baby stroller for children: C1 Frame: C20 Front leg: C22 Rear leg: C24 Handle linkage part: C26 Wheel: C30 Wheel seat: C32 End face: C321 Pivot joint: T Wheel orientation mechanism: C10 Drive guide member: C100 Pulley set: C110 First pulley: C112 Second pulley: C113 Guide post set: C120 First guide post: C122 Second guide post: C123 Lock part: C200 Lock member: C210 Elastic member: C220 Lock hole: C240 Drag part: C300 First end: C310 Second end: C320 Fourth embodiment: Baby stroller for children: D1 Frame: D20 Front leg: D22 Rear leg: D24 Handle linkage part D26 Wheel: D30 Wheel seat: D32 End face: D321 Wheel orientation mechanism: D10 Drive part: D100 Push member: D110 Pivot part: D112 Contact pressing part D114 Perforated part: D116 Slide member: D120 Slide part: D122 Projecting end part: D124 Receiving hole: D126 Lock part: D200 Lock member D210 Elastic member: D220 Rotating part: D230 Groove: D232 Lock hole: D240 Drag part: D300 First end: D310 Second end: D320

Claims

1. A wheel alignment mechanism including a drive part, a lock part, and a drag part, wherein the drive part includes a drive member and a trigger part, the trigger part operates by the folding and unfolding operations of the frame, and the drive member moves in a first direction and a second direction facing each other, respectively, the lock part locks and unlocks respectively by the movement of the drive member in the first direction and the second direction, the drag part includes a first end and a second end, the first end is connected to the drive part, and the second end is connected to the lock part, characterized in that it is a wheel alignment mechanism.

2. The trigger part rotates corresponding to the folding and unfolding operations of the frame, and the drive member rotates with respect to the trigger part, characterized in that it is the wheel alignment mechanism according to Claim 1.

3. The lock part further includes a lock pin and a lock hole. When the frame is folded, the lock pin moves into the lock hole. When the frame is unfolded, the lock pin moves away from the lock hole, characterized in that it is the wheel alignment mechanism according to Claim 1 or 2.

4. The first end of the drag part is connected to the end of the drive member away from the trigger part, and the second end of the drag part is connected to the end of the lock pin away from the lock hole, characterized in that it is the wheel alignment mechanism according to Claim 3.

5. The drive part further includes a chute, and the drive member slides in the chute along the first direction and the second direction respectively, characterized in that it is the wheel alignment mechanism according to any one of Claims 1 to 4.

6. The chute includes a fixing part and an orientation part provided inside thereof, and the fixing part and the orientation part are respectively provided at both opposite ends of the chute, characterized in that it is the wheel alignment mechanism according to Claim 5.

7. The drive member includes an end part, a receiving groove, and an orientation groove. The end part is located at the end of the drive member facing the trigger part, the receiving groove is located at the end of the drive member away from the trigger part, and the orientation groove is located between the end part and the receiving groove, characterized in that it is the wheel alignment mechanism according to any one of Claims 1 to 6.

8. The end part includes an inclination angle at its side end part, characterized in that it is the wheel alignment mechanism according to Claim 7. Claim 9 The orientation part in the chute passes through the orientation groove of the drive member. The wheel alignment mechanism according to claim 7 or 8, which incorporates claim 6, characterized in that. Claim 10 The trigger part includes a drive slope and a concave surface. The drive slope is located on one side of the trigger part, and the concave surface is provided adjacent to the drive slope and located on the other side of the trigger part. The wheel alignment mechanism according to any one of claims 1 to 9, characterized in that. Claim 11 When the frame is folded from the deployed position, the end of the drive member slides from contacting the concave surface to contacting the drive slope. When the frame is deployed from the folded position, the end of the drive member slides from contacting the drive slope to contacting the concave surface. The wheel alignment mechanism according to claim 10, characterized in that. Claim 12 When the frame is in a completely folded state, the end of the drive member contacts the edge of the end of the drive slope. The wheel alignment mechanism according to claim 10 or 11, characterized in that. Claim 13 The wheel alignment mechanism further includes a first reset member and a second reset member. The first reset member is provided on the drive part, and the second reset member is provided on the lock part. The wheel alignment mechanism according to any one of claims 1 to 12, characterized in that. Claim 14 Both the first reset member and the second reset member are elastic members, and the elastic force of the first reset member is greater than the elastic force of the second reset member. The wheel alignment mechanism according to claim 13, characterized in that. Claim 15 Corresponding to the frame being in the folded position, the first reset member is in a compressed state, and the second reset member is in a released state. Corresponding to the frame being in the deployed position, the first reset member is in a released state, and the second reset member is in a compressed state. The wheel alignment mechanism according to claim 13 or 14, characterized in that. Claim 16 One end of the first reset member is fixed to the fixed part of the chute, and the other end of the first reset member is fixed to the drive member. The wheel alignment mechanism according to any one of claims 13 to 15, characterized in that. Claim 17 The second reset member is fixedly provided above or below the lock pin of the lock portion, or the second reset member is provided in a receiving groove and is connected to the lock pin of the lock portion. The wheel alignment mechanism according to any one of claims 13 to 16, characterized in that.

18. The wheel alignment mechanism further includes a guide portion having a guide slot, and a part between the first end and the second end of the drag portion is located within the guide slot. The wheel alignment mechanism according to any one of claims 1 to 17, characterized in that.

19. The drag portion is a steel wire. The wheel alignment mechanism according to any one of claims 1 to 18, characterized in that.

20. A baby stroller for children comprising the wheel alignment mechanism according to any one of claims 1 to 19, wherein the lock portion is provided at a pivot joint between the front leg of the frame and the wheel seat, and the drive portion is at least partially provided at a pivot joint between the front leg, the rear leg and the handle linkage portion of the frame. A baby stroller for children, characterized in that.

21. The trigger portion rotates correspondingly, and the drive member rotates with respect to the trigger portion by the folding operation and the unfolding operation of the frame. The baby stroller for children according to claim 20, characterized in that.

22. The trigger portion of the drive portion is provided at the pivot joint between the front leg, the rear leg and the handle linkage portion of the frame. The baby stroller for children according to claim 20 or 21, characterized in that.

23. The lock hole of the lock portion is provided in the wheel seat of the wheel. The baby stroller for children according to any one of claims 20 to 22, characterized in that.

24. The guide portion of the wheel alignment mechanism is provided on the front leg. The baby stroller for children according to any one of claims 20 to 23, characterized in that.

25. A foldable frame including a frame body, a wheel assembly, a drive assembly, and an alignment assembly, wherein the frame body has a deployed state and a folded state, the wheel assembly is rotatably connected to the frame body, the drive assembly is provided on the frame body, the alignment assembly is provided between the frame body and the wheel assembly. When the frame body is in the deployed state, the orientation assembly is unlocked, the wheel assembly rotates relative to the frame body, and when the frame body is in the folded state, the drive assembly drives the orientation assembly to be locked, and the wheel assembly and the frame body are relatively fixed at a predetermined position. A foldable frame characterized by the above.

26. The orientation assembly includes an orientation element and an orientation groove. The orientation element is movably provided on the frame body. The wheel assembly includes a wheel seat rotatably connected to the frame body. The orientation groove is provided on the wheel seat and is offset from the rotation center of the wheel seat. When the wheel assembly rotates to the predetermined position relative to the frame body, the orientation element is inserted into the orientation groove. The foldable frame according to claim 25, characterized by the above.

27. The orientation assembly further includes a first reset member. Both ends of the first reset member are respectively in contact with the frame body and the orientation element. The first reset member always moves the orientation element in a direction approaching the wheel seat. The foldable frame according to claim 26, characterized by the above.

28. The drive assembly includes a drive member and a drag portion. Both ends of the drag portion are respectively connected to the frame body and the drive member. When the frame body is in the deployed state, the drag portion is tightened and always driven by the drive member to move the orientation element in a direction away from the wheel seat. When the frame is in the folded state, the drag portion is loosened, and the orientation element moves in a direction approaching the wheel seat under the action of the first reset member. The foldable frame according to claim 27, characterized by the above.

29. The drive member is rotatably provided on the frame body. The drive member has transmission teeth and has a first rotational position and a second rotational position. When the drag portion is tightened, the drive member rotates to the first rotational position, and the transmission teeth push the alignment element along a direction away from the wheel seat. When the drag portion is loosened, the drive member rotates to the second rotational position without pushing the alignment element along a direction away from the wheel seat. The foldable frame according to claim 28, characterized in that.

30. The contact pressing element is provided on one side of the alignment element. When the drag portion is tightened, the transmission teeth contact the side of the contact pressing element close to the wheel seat. The foldable frame according to claim 29, characterized in that.

31. The drive assembly further includes a second reset member, and the second reset member always moves the drive member to the second rotational position. The foldable frame according to claim 29 or 30, characterized in that.

32. The drive teeth are provided on the drive member. A plurality of tooth grooves are annularly provided on the wheel seat. When the drive member rotates, the drive teeth contact the groove wall of any corresponding tooth groove to drive the wheel seat to rotate. The foldable frame according to any one of claims 28 to 31, characterized in that.

33. When the drive teeth are inserted into any tooth groove, there is a gap between the drive teeth and the tooth groove. The foldable frame according to claim 32, characterized in that.

34. When the drive teeth are inserted into any tooth groove, the maximum width of the tooth groove is larger than the maximum width of the portion where the drive teeth are inserted into the tooth groove. The foldable frame according to claim 32 or 33, characterized in that.

35. The drive teeth include a first hypotenuse and a second hypotenuse having an inclination angle. The second hypotenuse is configured to contact the groove wall of any corresponding tooth groove, and the inclination angle of the first hypotenuse is larger than the inclination angle of the second hypotenuse. The foldable frame according to any one of claims 32 to 34, characterized in that.

36. The frame body includes a front leg support rod, a handrail support rod, and a foldable joint. The front leg support rod and the handrail support rod are rotatably connected to each other via the foldable joint. When the foldable joint is in a locked state, the front leg support rod and the handrail support rod are fixedly deployed relative to each other. When the foldable joint is in an unlocked state, the front leg support rod and the handrail support rod are folded relative to each other. An end of the drag portion is connected to the foldable joint. The foldable frame according to any one of claims 25 to 35, characterized in that.

37. The frame body further includes a fixing member provided on the foldable joint and offset from the rotation center of the foldable joint. An end of the drag portion is connected to the fixing member. The foldable frame according to claim 36, characterized in that.

38. The drive assembly includes a drag portion. Both ends of the drag portion are respectively connected to the frame body and the orientation element. When the frame body is in the deployed state, the drag portion is tightened to always move the orientation element away from the wheel seat. When the frame body is in the folded state, the drag portion is loosened, and the orientation element moves in a direction approaching the wheel seat under the action of the first reset member. The foldable frame according to any one of claims 26 to 37, characterized in that.

39. The drive assembly further includes a pulley fixed to the frame body. The drag portion winds around a part of the pulley, and the pulley is provided along the same direction as the orientation element for a part of the drag portion close to the orientation element. The foldable frame according to claim 38, characterized in that.

40. The foldable frame further includes a rotating shaft. One end of the rotating shaft is fixed to one of the frame body and the wheel assembly, and a pivot hole is provided in the other of the frame body and the wheel assembly. The other end of the rotating shaft is rotatably inserted into the pivot hole. The foldable frame according to any one of claims 25 to 38, characterized in that.

41. A baby stroller for children, comprising the foldable frame according to any one of claims 1 to 40. Characterized in that.

42. A wheel orientation mechanism including a drive guide member, a lock portion, and a drag portion, The lock portion includes a lock member and a lock hole, The drag portion includes a first end connected to the drive guide member and a second end connected to the lock member, The drag portion is tightened or loosened by the drive guide member as the frame is deployed or folded, whereby the lock member is separated from the lock hole or inserted into the lock hole to achieve unlocking or locking. A wheel orientation mechanism characterized by that.

43. The drive guide member includes a pulley set and a guide post set, and the pulley set and the guide post set are provided along the movement path of the drag portion. The wheel orientation mechanism according to claim 42, characterized in that.

44. The pulley set includes a first pulley and a second pulley, the guide post set includes a first guide post and a second guide post, and the first end of the drag portion is connected to the handle assembly of the frame through the first pulley, the first guide post, the second guide post, and the second pulley in sequence. The wheel orientation mechanism according to claim 42 or 43, characterized in that.

45. A pivot joint is provided on the rear leg of the frame, and the pivot joint has a lower end connected to the front leg of the frame and an upper end connected to the handle assembly of the frame. The wheel orientation mechanism according to claim 44, characterized in that.

46. The first pulley and the second pulley are distributed on the upper side and the lower side of the pivot joint, and the first guide post and the second guide post are distributed on the upper side and the lower side of the pivot joint. The wheel orientation mechanism according to claim 45, characterized in that.

47. The distance between the first guide post and the second guide post in the extending direction of the front leg is smaller than the distance between the first pulley and the second pulley in the extending direction of the front leg. The wheel orientation mechanism according to claim 45 or 46, characterized in that.

48. The first guide post, the second guide post, the first pulley, and the second pulley are all fixed pulleys or all fixed posts. The wheel alignment mechanism according to any one of claims 44 to 47, characterized in that.

49. The first guide post and the second guide post are fixed posts, and the first pulley and the second pulley are fixed pulleys. The wheel alignment mechanism according to any one of claims 44 to 47, characterized in that.

50. The handle assembly includes a handle linkage portion, a first end of the drag portion is connected to the handle linkage portion, and the upper end of the pivot joint is rotatably connected to the handle linkage portion. The wheel alignment mechanism according to any one of claims 45 to 49, characterized in that.

51. The first pulley is provided at a pivot connection portion between the pivot joint and the front leg, and the second pulley is provided at a pivot connection portion between the pivot joint and the handle linkage portion. The wheel alignment mechanism according to claim 50, characterized in that.

52. The lock portion further includes a rotating portion, and after the lock member drops, it abuts against and presses the rotating portion, and the lock hole rotates to align with the lock member to perform locking. The wheel alignment mechanism according to any one of claims 42 to 51, characterized in that.

53. Both the rotating portion and the lock hole are located on an end surface facing the frame of the wheel seat of the wheel. The wheel alignment mechanism according to claim 52, characterized in that.

54. The rotating portion is a continuous spiral surface located on the end surface, and the lock hole is located below the lowest point of the spiral surface. The wheel alignment mechanism according to claim 52 or 53, characterized in that.

55. A step surface is provided between the lowest point of the spiral surface and the lock hole. The wheel alignment mechanism according to claim 54, characterized in that.

56. The lock portion further includes an elastic member that abuts against and presses the lock member when the frame is folded. The wheel alignment mechanism according to any one of claims 42 to 55, characterized in that.

57. A wheel alignment mechanism including a drive portion, a lock portion, and a drag portion. The lock portion includes a lock member and a lock hole. The drag portion includes a first end connected to the drive portion and a second end connected to the locking member. With the deployment or folding operation of the frame, the drag portion moves between a first position where the locking member is inserted into the locking hole through the drive portion to achieve locking and a second position where the locking member is separated from the locking hole to achieve unlocking. A wheel orientation mechanism characterized by the above.

58. The drive portion includes a push member and a slide member. The push member rotates corresponding to the deployment or folding operation of the frame. The slide member linearly reciprocates by the push of the push member. The wheel orientation mechanism according to claim 57, characterized by the above.

59. The push member is disposed on the front leg of the frame and includes a pivot portion and a contact pressing portion. The push member rotates around the pivot portion. The contact pressing portion is located at one end of the push member and protrudes outward. When the frame is deployed, the contact pressing portion contacts and presses the slide member. The wheel orientation mechanism according to claim 58, characterized by the above.

60. The slide member is provided on the rear leg of the frame and includes a slide portion and a protruding end portion. The slide portion always contacts and supports the tube of the rear leg and slides along the tube of the rear leg when the slide member linearly moves. When the frame is deployed, the contact pressing portion contacts and presses the protruding end portion. The wheel orientation mechanism according to claim 59, characterized by the above.

61. The push member further includes a perforated portion, the slide member further includes a receiving hole, the first end of the drag portion is fixed in the receiving hole, the second end of the drag portion surrounds the pivot portion, enters the front leg of the frame through the perforated portion, and then is fixed to the locking member. The wheel orientation mechanism according to claim 59 or 60, characterized by the above.

62. The guide slot is provided in the pivot portion, the second end of the drag portion surrounds the guide slot, enters the front leg of the frame through the perforated portion, and then is fixed to the locking member. The wheel orientation mechanism according to claim 61, characterized by the above.

63. The locking portion further includes a rotating portion, and after the locking member drops, it abuts against and presses the rotating portion, causing the locking hole to rotate and align with the locking member to perform locking. The wheel alignment mechanism according to any one of claims 57 to 62, characterized in that.

64. Both the rotating portion and the locking hole are located on the end surface facing the frame of the wheel seat of the wheel. The wheel alignment mechanism according to claim 63, characterized in that.

65. The rotating portion is a spiral surface located on the end surface, and the locking hole is located below the lowest point of the spiral surface. The wheel alignment mechanism according to claim 63 or 64, characterized in that.

66. The locking portion further includes an elastic member that abuts against and presses the locking member when the frame is folded. The wheel alignment mechanism according to any one of claims 57 to 65, characterized in that.

67. A baby stroller for children, comprising a frame, a wheel, and the wheel alignment mechanism according to any one of claims 42 to 66, The frame includes a handle assembly, a front leg, and a rear leg, and the handle assembly, the front leg, and the rear leg can rotate relative to each other at the pivot joint. Each of the wheels includes a wheel seat. A baby stroller for children, characterized in that.

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