Baby stroller

Abstract

The invention discloses a stroller which comprises rear feet, handles, front feet and connecting pipes, the rear sides of the front feet are pivoted to the front sides of the rear feet, and the lower sides of the handles and the lower sides of the connecting pipes are pivoted to the rear feet or the front feet; a first locking mechanism used for limiting relative rotation of the connecting pipe and the rear foot is arranged between the lower side of the connecting pipe and the rear foot, and a first unlocking device used for unlocking the first locking mechanism is arranged between the handlebar and the first locking mechanism. When the child stroller is folded, the first unlocking device is driven to unlock the first locking mechanism, the rotating handlebar drives the connecting pipe to rotate together in the same direction, and then the child stroller can be folded, so that the folding operation of the child stroller is very simple and convenient.

Description

Technical Field

[0001] The invention relates to the field of infant products, and in particular to a child stroller. Background Art

[0002] A stroller can be used to carry infants and young children. The infants and young children sit on the seats of the stroller, and the parents push the stroller forward, thereby reducing the hardship of the parents in holding the children. Therefore, strollers are widely used in families with children.

[0003] In order to make the use more convenient, the child stroller is generally configured to be foldable, so the child stroller is provided with a locking mechanism to lock the child stroller in the unfolded state. When the child stroller is to be folded, the locking mechanism is unlocked before the folding operation is performed. Therefore, for many parents, the unlocking operation of the child stroller should be relatively simple so that the folding operation will be easier. Summary of the invention

[0004] The object of the present invention is to provide a child stroller, which is easy to unlock and thus easy to fold.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A child stroller that can be switched between an unfolded state and a folded state, the child stroller comprises a rear foot, a rider, a front foot, and a connecting tube, the rear side of the front foot is pivotally connected to the front side of the rear foot, the lower sides of the rider and the connecting tube are pivotally connected to the rear foot or / and the front foot; a first locking mechanism for limiting the relative rotation between the lower side of the connecting tube and the rear foot or the front foot is provided, the rider is provided with a first unlocking device, the first unlocking device is provided in cooperation with the first locking mechanism; the first locking mechanism can be unlocked by driving the first unlocking device. After the first locking mechanism is unlocked, rotating the rider can drive the connecting tube to rotate in the same direction.

[0007] A second locking mechanism for limiting relative rotation between the rider's lower side and the rear foot or the front foot is provided, and a second unlocking device for unlocking the second locking mechanism is provided between the rider and the second locking mechanism; the second unlocking device is connected to the first unlocking device, and the two are configured so that when the first unlocking device is driven to unlock the first locking device, the second unlocking device can be linked to unlock the second locking mechanism.

[0008] The rider is arranged to be rotatable and convertible between a rearward position and a forward position. When the stroller is in the unfolded state, after driving the second unlocking device to unlock the second locking mechanism, the rider can be rotatably converted between the forward position and the rearward position; preferably, the second unlocking device and the first unlocking device are also arranged such that when the second unlocking device is driven to unlock the second locking mechanism, the first unlocking device is not linked to unlock the first locking device; preferably, the first unlocking device and the first locking mechanism are arranged to be detachably engaged. When the rider is in the rearward position, the first unlocking device is engaged with the first locking mechanism, and the first unlocking device can be driven to unlock the first locking mechanism; when the rider is in the forward position, the first unlocking device is disengaged from the first locking mechanism, and the first unlocking device cannot be driven to unlock the first locking mechanism.

[0009] Since the present invention adopts the above technical solution, the following beneficial effects are achieved:

[0010] 1. Driving the first unlocking device on the rider can unlock the first locking mechanism, so the unlocking operation is simple, and thus the folding operation is simple; moreover, after unlocking the first locking mechanism, rotating the rider can drive the connecting pipe to rotate in the same direction to fold the stroller of the present invention, so the folding operation of the stroller of the present invention is further simpler;

[0011] 2. Unlocking the first locking device can simultaneously unlock the second locking mechanism for restricting the rotation of the rider relative to the rear foot, without the need to perform two unlocking operations on the two locking mechanisms, making the folding operation of the stroller of the present invention further simpler;

[0012] 3. The rider is arranged to be rotatable and convertible between the forward position and the rearward position, but due to the adoption of the above technical solution, unlocking the second locking mechanism alone will not cause the unlocking of the first locking mechanism, that is, the conversion of the rider will not cause the folding of the stroller, so the safety of the stroller of the present invention in the unfolded state is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic plan view of the stroller of the first embodiment of the present invention in the unfolded state when the rider is in the rearward position;

[0014] Figure 2 is a schematic perspective view of the stroller of the first embodiment of the present invention in the unfolded state when the rider is in the rearward position;

[0015] Figure 3 is a schematic plan view of the stroller of the first embodiment of the present invention during the folding process;

[0016] Figure 4 is a schematic perspective view of the stroller of the first embodiment of the present invention during the folding process;

[0017] Figure 5 It is a schematic plan view of the stroller in the folded state according to the first embodiment of the present invention;

[0018] Figure 6 According to Figure 2 The enlarged schematic sectional view in the A-A direction in

[0019] Figure 7 According to Figure 2 The enlarged exploded view of part B in

[0020] Figure 8 The enlarged view of the second driving member of the stroller according to the first embodiment of the present invention;

[0021] Figure 9 According to Figure 2 The enlarged exploded view of part B from another angle in

[0022] Figure 10 The enlarged exploded view of the connecting pipe, the first locking mechanism, the first unlocking device, and the stroller body of the stroller according to the first embodiment of the present invention;

[0023] Figure 11 The enlarged exploded view of the first unlocking device and the third driving member of the stroller according to the first embodiment of the present invention;

[0024] Figure 12 It is a schematic plan view of the stroller in the unfolded state when the stroller body is in the forward position according to the first embodiment of the present invention;

[0025] Figure 13 According to Figure 2 The enlarged exploded view of part E in

[0026] Figure 14 The enlarged exploded view of some acting components of the stroller when the stroller body is in the backward position according to the first embodiment of the present invention;

[0027] Figure 15 The enlarged view of the acting member of the stroller according to the first embodiment of the present invention;

[0028] Figure 16 The enlarged plan view of part F according to Figure 14 when the stroller body is in the backward position;

[0029] Figure 17 The enlarged view from another angle of the acting member, the front wheel driving member, and the rear wheel driving member when the stroller body is in the backward position;

[0030] Figure 18 The further enlarged view from another angle of the acting member, the front wheel driving member, and the rear wheel driving member when the stroller body is in the backward position;

[0031] Figure 19 When in the forward position of the rider, according to Figure 14 A plane enlarged schematic diagram of part F in

[0032] Figure 20 When in the backward position of the rider, an enlarged schematic diagram of the actuating member, the front wheel actuating member, and the rear wheel actuating member from another angle;

[0033] Figure 21 When the stroller is in the folded state, according to Figure 14 A plane enlarged schematic diagram of part F in

[0034] Figure 22 When the stroller is in the folded state, an enlarged schematic diagram of the actuating member, the front wheel actuating member, and the rear wheel actuating member from another angle;

[0035] Figure 23 An enlarged schematic diagram of the rear wheel set and the rear wheel orienting member of the stroller of the present invention;

[0036] Figure 24 According to Figure 2 An enlarged sectional view in the D-D direction in

[0037] Figure 25 A three-dimensional schematic diagram of the stroller of the second embodiment of the present invention Figure 1 ;

[0038] Figure 26 A three-dimensional schematic diagram of the stroller of the second embodiment of the present invention Figure 2 ;

[0039] Figure 27 According to Figure 26 An exploded enlarged schematic diagram of part E in

[0040] Figure 28 A schematic diagram of the stroller of the second embodiment of the present invention after being folded. Detailed implementation manners

[0041] As Figures 1 to 24 shown, it is the first embodiment of the stroller of the present invention.

[0042] Figures 1 to 11As shown, the present invention discloses a baby stroller that can be switched between an unfolded state and a folded state. The baby stroller includes rear legs 1, a seat 2, front legs 3, and a connecting pipe 45. The rear side of the front leg 3 is pivotally connected to the front side of the rear leg 1, and the lower sides of both the seat 2 and the connecting pipe 45 are connected to the rear leg 1 or / and the front leg 3. A first locking mechanism for restricting relative rotation between the two is provided between the lower side of the connecting pipe 45 and the rear leg 1 or the front leg 3. A first unlocking device is provided on the seat 2, and the first unlocking device is cooperatively arranged with the first locking mechanism. Driving the first unlocking device can unlock the first locking mechanism. After the first locking mechanism is unlocked, rotating the seat 2 can drive the connecting pipe 45 to rotate in the same direction together, thereby driving the baby stroller to fold.

[0043] Preferably, the lower side of the connecting pipe 45 is pivotally connected to the rear leg 1 so as to rotate around a first rotation axis, and the lower side of the seat 2 is pivotally connected to the rear leg 1 so as to rotate around a second rotation axis. The first rotation axis and the second rotation axis are arranged in parallel, or the first rotation axis and the second rotation axis are the same rotation axis, or the first rotation axis and the second rotation axis are on the same straight line. Thus, during the folding process of the baby stroller of the present invention, the seat 2 and the connecting pipe 45 can rotate at the same angle, so that the folding operation is smoother. In this embodiment, the lower sides of the seat 2 and the connecting pipe 45 are coaxially connected to opposite sides of the rear leg 1, which is more convenient for assembly. Moreover, the seat 2 and the connecting pipe 45 can ensure the same-angle rotation during folding, and also make the folding operation of the baby stroller of the present invention simpler.

[0044] The first unlocking device includes a first driving member 63 that is connected to the seat 2 so as to be relatively movable up and down, and a first transfer member 64 that is connected to one side of the first driving member 63 and can move up and down therewith. The other side of the first transfer member 64 is connected to a first locking member 61. When the first driving member 63 moves upward, it drives the first transfer member 64 to move upward to unlock the first locking mechanism. In this embodiment, the connecting pipe 45 and the rear leg 1 can rotate relative to each other.

[0045] A second transfer member 45 that can cooperate with the first transfer member 64 is connected to the connecting pipe 45. The second transfer member 45 is connected to the seat 2 so as to be relatively movable up and down, and the second transfer member 45 is connected to the first locking mechanism. When the first transfer member 64 is connected to the second transfer member, moving the first transfer member 64 upward can drive the second transfer member 65 to move upward to unlock the first locking mechanism. Rotating the seat 2 backward and downward can drive the connecting pipe 45 to rotate backward and downward together through the connection between the first transfer member 64 and the second transfer member 45, thereby folding the baby stroller of the present invention.

[0046] The first locking mechanism includes a first locking piece 61 connected to the connecting tube 45 so as to be movable up and down relative to each other, a first elastic piece 62 disposed between the first locking piece 61 and the connecting tube 45, and a first locking groove 11 disposed on the rear leg 1 or the front leg 3 and opening upward; when the child stroller is in the unfolded state, under the action of the first elastic piece 62, the first locking piece 61 moves downward and the lower side extends into the first locking groove 11, the first locking mechanism is in the locked state, the connecting tube 45 cannot rotate relative to the rear leg 1 and / or the front leg 3, and the child stroller of the present invention cannot be folded.

[0047] The second adapter 65 is connected to the first locking member 65 and the two can move up and down together relative to the connecting tube 45; therefore, when the first adapter 64 moves upward, it can drive the second adapter 65 to move upward, thereby driving the first locking member 61 to move upward and disengage from the first locking groove 11, the first locking mechanism is unlocked, and the connecting tube 45 can rotate relative to the rear foot 1 or the front foot 3.

[0048] A third elastic member 66 is provided between the first driving member 63 and the rider 2 to drive the first driving member 63 to move downward, thereby facilitating automatic resetting of the first driving member 63 , the first adapter member 64 , the second adapter member 65 , and the first locking member 61 .

[0049] The upper side of the first locking member 61 is relatively movable up and down in the connecting tube 45, and the second adapter 65 is at least partially located outside the connecting tube 45. The side wall of the connecting tube 45 is provided with a vertically extending long hole 251 on the side facing the rear 2 of the vehicle for the connecting portion of the second adapter 65 and the first locking member 61 to move up and down. Similarly, the side wall of the rider 2 is provided with a vertically extending long hole 121 on the side facing the connecting tube 45 for the other side of the first adapter 64 to extend out and move up and down.

[0050] In this embodiment, the first driving member 63 is arranged in the handle 2, a mounting member 67 is fixedly connected in the handle 2, and the mounting member 67 is provided with a receiving groove 671 opening toward the connecting tube 45, the first driving member 63 is relatively movably placed in the receiving groove 671, and the third elastic member 66 is arranged between the top of the first driving member 63 and the top wall of the receiving groove 671. Preferably, when the child stroller is in the unfolded state, under the action of the third elastic member 66, the lower end of the first driving member 63 contacts the bottom wall of the receiving groove 671, and such arrangement makes the structure more stable, that is, the child stroller of the present invention is more stable when in the unfolded state, so that it is safer to use.

[0051] A first driving device capable of driving the first unlocking device to unlock the first locking mechanism is provided on the rider 2. In this embodiment, the first driving device includes a first driving group movably provided on the rider 2 and a first connecting member 69 connected to the upper side of the first driving group. The lower side of the first connecting member 69 is connected to a first driving member 63. Operating the first driving group can pull the first driving member 63 upward through the first connecting member 69.

[0052] Preferably, a first avoidance hole 672 is provided on the top wall of the mounting member 67. The lower end of the first connecting member 69 passes downward through the first avoidance hole 672 and then is connected to the first driving member 63.

[0053] In this embodiment, the baby stroller includes a push handle 68 pivotally connected to the upper side of the rider 2. The push handle 68 is set as the first driving group, and the push handle is set such that rotating the push handle 68 downward can pull the first connecting member 69 upward, thereby pulling the first driving member 63 upward. With this setting, when folding the baby stroller, the push handle 68 is also folded at the same time, thereby reducing the overall height of the folded baby stroller of the present invention, and further reducing the overall volume of the folded baby stroller.

[0054] The specific structure and its operating principle of the rotation of the push handle 68 driving the first connecting member 69 upward can adopt any known and feasible technology. Since it is not the focus of the present invention, it will not be elaborated here.

[0055] In other embodiments, the first driving group can also be set in any other known and feasible structure on the rider, as long as the first unlocking device can be driven to unlock the first locking mechanism by operating the first driving group. For example, the first driving group can also be set as a component that can be connected to the rider 2 to move relatively up and down. Moving this component upward can pull the first connecting member upward, thereby pulling the first driving member upward to unlock the first locking mechanism. Also, for example, the first driving group can also be set as a component that can be connected to the rider 2 to rotate relatively. Rotating this component relative to the rider can pull the first connecting member upward, thereby pulling the first driving member upward to unlock the first locking mechanism. Again, for example, the first driving group can also be set as a button that can be connected to the rider 2 to move relatively. Pressing this component can pull the first connecting member upward, thereby pulling the first driving member upward to unlock the first locking mechanism. These are not listed one by one here.

[0056] In another embodiment, the first driving device may not be provided, and the first driving member 63 is set such that a part of it extends out of the rider (not shown in the figure). By directly moving upward the part of the first driving member 63 that extends out of the rider, the first driving member 63 can be moved upward, thereby unlocking the first locking mechanism.

[0057] Regardless of the above-mentioned method, the first driving member is arranged on the handle, so the first driving member is directly moved upward to unlock the first locking mechanism, so that after unlocking, the handle is rotated backward and downward to fold the child stroller of the present invention; in addition, the first driving device that can drive the first unlocking device to unlock the first locking mechanism is also arranged on the handle, so that after unlocking, the handle can still be rotated backward and downward to fold the child stroller of the present invention, thereby making the folding operation of the child stroller of the present invention easier.

[0058] A second locking mechanism is provided between the lower side of the rider 2 and the rear foot 1 or the front foot 3 to limit the relative rotation of the two. With such a configuration, when the child stroller is in the unfolded state, the first locking device and the second locking mechanism are arranged so that both the connecting tube 45 and the rider are locked. To fold the child stroller of the present invention, both the first locking device and the second locking mechanism must be unlocked, and the rider 2 and the connecting tube 45 can be rotated backward and downward, that is, they can be folded, thereby making the child stroller of the present invention more stable in the unfolded state.

[0059] A second unlocking device for unlocking the second locking mechanism is provided between the driver 2 and the second locking mechanism.

[0060] The second unlocking device includes a third driving member 74 that can be relatively moved up and down on the driver 2, a second connecting member 75 connected to the third driving member 74 at the upper end, and a second driving member 73 connected to the lower end of the second connecting member 75; the second driving member 73 is arranged in cooperation with the second locking mechanism; moving the third driving member 74 upward can link the second connecting member 75 to drive the second driving member 73 to drive the second locking mechanism to unlock.

[0061] The connecting tube 45 and the lower side of the rider 2 are both pivotally connected to the rear foot 1, and the first locking mechanism is arranged between the connecting tube 45 and the rear foot 1, that is, the first locking groove 11 is arranged on the rear foot; the second locking mechanism is arranged between the rider 2 and the opposite side of the rear foot 1, and the lower side of the connecting tube 45 is pivotally connected to the side of the rear foot 1 away from the rider. In this embodiment, the second locking mechanism includes a first tooth groove 22 and a second tooth groove 12 respectively arranged on the opposite side of the rider 2 and the rear foot 1, a gear 71 arranged in the first tooth groove 22 and the second tooth groove 12 so as to be relatively movable left and right, and a second elastic member arranged between the bottom wall of the second tooth groove 12 and the gear 71; under the action of the second elastic member, the gear 71 is meshed with the first tooth groove 22 and the second tooth groove 12 at the same time, and the second locking mechanism is in a locked state, and the rider 2 cannot rotate relative to the rear foot 1.

[0062] The second driving member 73 is rotatable relative to and is disposed between the bottom wall of the first tooth groove 22 and the gear 71 such that it can move relatively left and right; a mating driving part and a driven part are respectively disposed on the opposite sides of the bottom wall of the first tooth groove 22 and the second driving member 73; when the third driving member 74 is moved upward, the second driving member 73 can be pulled to rotate through the second connecting member 75. When the second driving member 73 rotates, through the cooperation of the driving part and the driven part, the second driving member 73 moves in the direction of the gear 71 while rotating, thereby pushing the gear 71 in the direction of the second tooth groove 12. When the gear 71 disengages from the first tooth groove 22 and only meshes with the second tooth groove 12, the second locking mechanism is unlocked, and the rider 2 can rotate relative to the rear foot 1.

[0063] In this embodiment, the driving part and the driven part are respectively a boss 221 and a groove 731 disposed on the opposite sides of the bottom wall of the first tooth groove 22 and the second driving member 73. An engaging driving inclined surface 2211 and a driven inclined surface 7311 are respectively disposed on the boss 221 and in the groove 731. Thus, when the second driving member 73 rotates, through the cooperation of the driving inclined surface 2211 and the driven inclined surface 7311, the second driving member 73 moves in the direction of the gear 71 while rotating to push the gear. When the third driving member 74 is released, under the action of the second elastic member, the gear 71 and the second driving member 73 move in the direction of the first tooth groove 22. Through the cooperation of the driving inclined surface 2211 and the driven inclined surface 7311, the second driving member 73 rotates in the reverse direction, thereby pulling the third driving member 74 downward through the third connecting member 77. The second driving member 73 and the third driving member 74 are reset, and the gear meshes with the first tooth groove and the second tooth groove again, thereby locking the rider at this angular position.

[0064] A second driving device for driving the second unlocking device to unlock the second locking mechanism is further disposed on the rider 2. In this embodiment, the second driving device includes a second driving group 76 movably connected to the rider 2, and a third connecting member 77 having an upper end connected to the second driving group 76. The lower end of the third connecting member 77 is connected to the third driving member 74; by driving the second driving group 76 to move, the third driving member 74 can be pulled upward through the third connecting member 77, thereby unlocking the second locking mechanism.

[0065] In this embodiment, the second driving group 76 is configured as an unlocking member movably connected to the rider 2 in a relatively up-and-down manner. By moving the unlocking member 76 upward, the third driving member 74 can be pulled upward through the third connecting member 77. In other embodiments, the second driving group 76 can also adopt any other well-known and feasible technologies, which are not the focus of the present invention and will not be elaborated herein.

[0066] In this embodiment, the third driving member 74 is disposed within the rider 2. In other embodiments, it may also be arranged such that a part of the third driving member 74 is located within the rider and a part extends outside the rider 2, so as to directly move upward the part of the second driving member 74 exposed outside the rider, thereby moving the entire third driving member 74 upward, and thus unlocking the second locking mechanism.

[0067] In this embodiment, preferably, the second unlocking device and the first unlocking device are connected to each other, and the two are arranged such that when the first unlocking device is driven to unlock the first locking device, the second unlocking device can be interlocked to unlock the second locking mechanism.

[0068] Combined with Figure 12 As shown, preferably, the rider 2 is arranged to be rotatable and convertible between a rearward position and a forward position, and when the rider 2 is in the rearward position, the first unlocking device can be driven to unlock the first locking mechanism. Further, the second unlocking device and the first unlocking device are also arranged such that when the second unlocking device is driven to unlock the second locking mechanism, the first unlocking device is not interlocked to unlock the first locking device. When the stroller is in the unfolded state, after driving the second unlocking device to unlock the second locking mechanism, the rider can be rotatably converted between the forward position and the rearward position. When the rider rotates to the forward position or the rearward position, the operation on the second unlocking device is released, the third driving member 74 resets, and the gears return to the state of meshing with the first tooth groove and the second tooth groove simultaneously, and the second locking mechanism is locked, thereby locking the rider 2 in the forward position or the rearward position after conversion.

[0069] Correspondingly, the first adapter 64 and the second adapter 65 are arranged to be detachably connected; when the rider 2 is in the rearward position (as Figure 12 shown), the first adapter 64 and the second adapter 65 are connected, and when the rider 2 is in the forward position, the first adapter 64 is disengaged from the connection with the second adapter 65. With such an arrangement, when the stroller of the present invention is in the unfolded state, the rider 2 can be rotatably converted back and forth; when the rider 2 is in the rearward position, since the first adapter 64 and the second adapter 65 are connected, the rider 2 is positioned at this rearward position, and when the first adapter 64 moves upward, it can drive the second adapter 65 to move upward together, thereby unlocking the first locking mechanism; when folding, when the rider 2 rotates backward, the first adapter 64 can push the connecting pipe 45 to move backward and downward together through the second adapter 65. When the rider 2 is in the forward position, since the first adapter 64 is disengaged from the connection with the second adapter 65, the upward movement of the first adapter 64 cannot drive the upward movement of the second adapter 65, and thus the first locking mechanism cannot be unlocked, and the stroller of the present invention cannot be folded.

[0070] In this embodiment, the part of the second adapter 65 located outside the connecting tube 45 is provided with a contact groove 651 opening forward, and when the rider 2 is in the rearward position, the other side of the first adapter 64 is placed in the contact groove 651. With such a configuration, when the child stroller is in the unfolded state, the rear side of the first adapter 64 is blocked by the rear wall of the contact groove 651, so that the rider 2 is positioned in the rearward position and cannot continue to rotate downward and backward; when the stroller is folded, the first adapter 64 moves upward and presses against the top wall of the contact groove 651, thereby driving the second adapter 65 to move upward, and when the rider 2 rotates backward, it can push the rear wall of the contact groove 651, thereby driving the connecting tube 45 to rotate backward together. However, when the stroller of the present invention is in the unfolded state, when the rider 2 rotates forward from the rearward position, the first adapter 64 can be separated from the second adapter 65 from the opening, so that the forward rotation of the rider 2 will not be blocked. That is, as long as the second locking mechanism is unlocked, the rider 2 can be directly adjusted to the forward position by rotating the rider 2 forward.

[0071] Preferably, the connecting tube 45 is further provided with a contact member 46 extending toward the driver 2, and the unlocking member 76 is further provided with a contact portion 761 (such as Figure 13 As shown in FIG. 1 , when the rider 2 is in the rearward position, the rear side of the contact portion 761 contacts the contact member 46. With this arrangement, when the child stroller is in the unfolded state, the rider 2 is more stable when in the rearward position.

[0072] In this embodiment, the third driving member 74 is connected to the first driving member 63 so as to be movable up and down relatively, and the two are configured so that the third driving member 74 can move upward to drive the first driving member 63 to move upward together; when the third driving member 74 moves upward, the first driving member 63 is not driven to move upward.

[0073] In this embodiment, the third driving member 74 is provided with a long hole 741 extending vertically. Part or / and the first adapter 64 of the first driving member 63 can pass through the long hole 741 in a relatively vertically movable manner. When the second locking mechanism is in the locked state, under the action of the second elastic member, part or / and the first adapter 64 of the first driving member 63 contacts the top wall of the long hole 741 of the third driving member 74. With such a setting, regardless of whether the rider 2 is in the rearward position or the forward position, when the third driving member 74 moves upward, the first driving member 63 and the first adapter 64 will not be driven to move upward. That is, when the second unlocking device is driven to unlock the second locking mechanism, the first unlocking device will not be linked to unlock the first locking device; however, when the first driving member 63 moves upward, the third driving member 74 will be driven to move upward together. That is, when the first unlocking device is driven to unlock the first locking device, it can link the second unlocking device to unlock the second locking mechanism. With such a setting, when the stroller is in the unfolded state, not only can the second locking mechanism be unlocked independently without affecting the first unlocking device, and then the rider 2 can be rotated forward and backward to realize the front-back reversing function of the rider 2, thus avoiding the accidental folding of the stroller of the present invention caused by the rider reversing operation, that is, ensuring the safety of the stroller of the present invention during use; moreover, when the rider 2 is in the rearward position, the second locking mechanism can be unlocked by linking with the operation of unlocking the first locking mechanism. That is, the first locking device and the second locking mechanism can be unlocked at one time without performing different operations to unlock, thus making the unlocking operation of the stroller of the present invention simpler.

[0074] On the side of the first driving member 63 facing the connecting pipe 45, an installation boss 634 is convexly provided. The installation boss 634 is provided with a hole 6341. One side of the first adapter 64 is inserted into the hole 6341 of the installation boss 634, so as to realize the connection between the first adapter 64 and the first driving member 63; the installation boss 634 passes through the long hole 741 and contacts the top wall of the long hole 741 of the third driving member 74. In this way, the structure is more stable. In other embodiments, it may also be that the vertical portion 631 is provided with a concave hole, and one end of the first adapter 64 extends into the concave hole; correspondingly, the first adapter 64 contacts the top wall of the long hole 741 of the third driving member 74.

[0075] In this embodiment, the first driving member 63 includes a vertical portion 631, an upper wall portion 632 and a lower wall portion 633 respectively connected to the upper and lower ends of the vertical portion 631. The third driving member 74 is disposed between the upper wall portion 632 and the lower wall portion 633 so as to be movable relatively up and down. The mounting boss 634 is disposed on the vertical portion 631. Under the action of the second elastic member, the lower end of the third driving member 74 contacts the lower wall portion 633. With such a setting, the connection between the third driving member 74 and the first driving member 63 and the mounting member 67 is more stable, so that the baby stroller is more stable in the unfolded state and safer to use.

[0076] A second avoidance hole 674 is further provided on the top wall of the mounting member 67, and the first avoidance hole 672 and the second avoidance hole 674 are spaced apart; a corresponding third avoidance hole 630 is also provided on the upper wall portion 632 of the first driving member 63. The lower end of the third connecting member 77 passes downward through the first avoidance hole 672 and the third avoidance hole 630 and then is connected to the third driving member 74. With such a setting, the first connecting member 69 and the third connecting member 77 can be made not to interfere with each other, so as to further ensure that when the second driving device is operated, the first unlocking device will not be driven to act.

[0077] The baby stroller further includes a linkage folding device disposed between the rear feet 1, the front feet 3, and the connecting pipe 45 or between the rear feet, the front feet and the seat. The linkage folding device is configured such that when the baby stroller is folded, when the seat 2 rotates backward and downward, the front feet 3 and the rear feet 1 can be driven to rotate relatively closer by the linkage folding device.

[0078] In this embodiment, the linkage folding device includes a first linkage member 41, a second linkage member 42, and a third linkage member 5. The front side of the first linkage member 41 is pivotally connected to the front feet 3, the rear side of the second linkage member 42 is pivotally connected to the rear feet 1, the upper side of the third linkage member 5 is pivotally connected to the connecting pipe 45, and the lower side is coaxially pivotally connected to the rear side of the first linkage member 41 and the front side of the second linkage member 42, or pivotally connected to two of them, and the third one is pivotally connected to any one of the two.

[0079] The first linkage member 41 can be set as the seating portion of a seat, that is, the first linkage member 41 is the seating portion of the seat. It can also be that the first linkage member 41 is the front seating portion of a seat, and the second linkage member 42 is the rear seating portion of the seat, that is, both the first linkage member 41 and the second linkage member 42 are part of the seating portion of a seat. The connecting pipe 45 can be used to connect to the periphery of the front side of a seat cloth, and the seat cloth is also connected to the seating portion of the seat. The connection manner between the seat cloth and the connecting pipe and the seat can be any well-known and feasible structure, and since it is not the inventive point of the present invention, it will not be elaborated here.

[0080] When the stroller of the present invention is in the unfolded state, the pivotal position between the upper side of the third linkage member 5 and the connecting tube 45 is located on the upper side of the pivotal position between the connecting tube 45 and the rear leg 1; the pivotal position between the front side of the first linkage member 41 and the front leg 3 is located on the lower side of the pivotal position between the front leg 3 and the rear leg 1; the pivotal position between the rear side of the second linkage member 42 and the rear leg 1 is located on the lower side of the pivotal position between the rear leg 1 and the rider 2 or / and the front leg 3.

[0081] When the rider 2 is in the rearward position, the stroller of the present invention is folded. Specifically, the first driving group is driven to pull the first driving member 63 upward through the first connecting member 69, thereby pulling the third driving member 74 and the first adapter member 64 upward together, thereby driving the first locking member 61 upward, so that the lower side of the first locking member 61 is disengaged from the engagement with the first locking groove 11, and the first locking mechanism is unlocked; and as mentioned above, the upward movement of the third driving member 74 can make the second driving member 73 move in the direction of the gear 71 to unlock the second locking mechanism. At this time, the rider 2 rotates backward and downward, and the first adapter pushes the wall 651 of the second adapter contact groove to drive the connecting tube 45 to rotate backward and downward together, so that the third linkage member 5 rotates relative to the connecting tube 45 and also rotates backward and downward together with the connecting tube 45. In this way, the lower side of the third linkage member 5 will push the rear side of the first linkage member 41 and the front side of the second linkage member 42 to move downward and rotate, so that the front side of the first linkage member 41 and the rear side of the second linkage member 42 can pull the front foot 3 and the rear foot 1 to rotate relative to each other. If the rear foot 1 is used as a support point and does not move, the front foot 3 rotates backward. If the front foot 3 is used as a support point and does not move, the rear foot 1 rotates forward. In short, the front foot 3 and the rear foot 1 are relatively close to each other, and the angle between the two becomes smaller. Figure 3 , 4 Until the above components can no longer rotate relative to each other, at this time, they are in the folded state (such as Figure 5 That is, when the first locking mechanism is unlocked, the second locking mechanism can also be unlocked, so that the folding operation of the stroller of the present invention is very simple; and by rotating the handle 2 backward and downward, the other components can be rotated and moved together to fold, so that the folding operation of the stroller of the present invention is very simple. Moreover, after folding, the rear leg 1, the handle 2, the front leg 3, the first linkage member 41, the second linkage member 42, and the third linkage member 5 are relatively close, and the whole is relatively flat and small in size, so it is convenient to carry and store.

[0082] Regardless of whether the first linkage member 41 can be configured as a seating portion of a seat, or the first linkage member 41 and the second linkage member 42 together form a seating portion of a seat for supporting a child, when the child stroller of the present invention is folded, they can all be folded together, that is, the seating portion of the seat can be folded together, thereby making the folding operation of the child stroller of the present invention simpler and more convenient as a whole.

[0083] The first connecting member 69, the second connecting member 75, the third connecting member 77, the fourth connecting member 36, and the fifth connecting member 18 can all be configured as steel wires or similar structures.

[0084] In this embodiment, the lower side of the rider 2 is connected to an actuating member 8 that can rotate together with the actuating member, and the rear foot 1 is provided with a limiting structure that cooperates with the actuating member 8. The limiting structure is configured so that when the rider 2 rotates forward from the rearward position to the forward position, the cooperation between the actuating member 8 and the limiting structure prevents the rider 2 from rotating forward any further, thereby making the switching operation more intuitive.

[0085] The rear foot 1 is provided with a receiving chamber 10 in communication with the rider 2 on the side facing the connecting tube 45 (i.e., the side away from the second tooth groove 12), and the action member can be relatively rotatably placed in the receiving chamber 8. An arc-shaped limiting groove 101 which is not connected at the end is recessed on the bottom wall of the receiving chamber 10, and the limiting groove 101 is set as the limiting structure; the action member 8 includes a limiting portion 82, and the limiting portion 82 is relatively rotatably placed in the arc-shaped limiting groove 101. When the rider 2 is in the forward position, the limiting portion 82 abuts against one end of the limiting groove 101, so that the rider 2 can no longer rotate forward. The limiting groove 101 is not connected at the end, that is, the limiting groove 101 is not set in a full circle.

[0086] The bottom wall of the accommodating cavity 10 is provided with a through hole communicating with the second tooth groove 12, and the lower side of the rider 2 is connected to the action member 8 through the through hole. The limiting groove 101 is arranged around the outer side of the through hole, so that when the rider 2 rotates, the limiting part can always rotate in the limiting groove 101.

[0087] Because the accommodating cavity 10 and the second tooth groove 12 are respectively arranged on different sides of the rear leg 1 , the second locking mechanism and the action member 8 do not interfere with each other.

[0088] Combination Figures 14 to 22As shown, in this embodiment, the lower sides of the front feet 3 and the rear feet 1 are respectively connected to a horizontally rotatable front wheel set and a rear wheel set; between the front feet 3 and the front wheel set and between the rear feet 1 and the rear wheel set, there are respectively a front wheel orientation mechanism and a rear wheel orientation mechanism that can limit the relative horizontal rotation of the corresponding two; that is, between the front feet 3 and the front wheel set, there is a front wheel orientation mechanism that can limit the relative horizontal rotation of the corresponding two, and between the rear feet 1 and the rear wheel set, there is a rear wheel orientation mechanism that can limit the relative horizontal rotation of the two; between the front wheel orientation mechanism, the rear wheel orientation mechanism and the actuator 8, there are respectively a front wheel linkage device and a rear wheel linkage device; the actuator 8 includes a body 81, and the body 81 is arranged in a cam shape, and the sides of the front wheel linkage device and the rear wheel linkage device facing the actuator 8 are both in contact with the outer surface of the cam-shaped body 81; during the rotation and direction change of the rider 2, the contact positions of the front wheel linkage device and the rear wheel linkage device with the outer surface of the cam-shaped body 81 rotate and change, thereby changing the unlocked state or the locked state of the front wheel orientation mechanism and the rear wheel orientation mechanism. That is, if the front wheel orientation mechanism and the rear wheel orientation mechanism are in the locked state before the rider changes direction, they will become unlocked, and if they are in the unlocked state before the rider changes direction, they will become locked, thereby changing the state of whether the front wheel set and the rear wheel set can rotate horizontally.

[0089] Preferably, in this embodiment, when the rider 2 rotates to the backward position, the rear wheel orientation mechanism is linked to the locked state through the rear wheel linkage device, and the front wheel orientation mechanism is linked to the unlocked state through the front wheel linkage device, so that the rear wheel set cannot rotate horizontally relative to the rear feet 1, and the front wheel set can rotate horizontally relative to the front feet 3; when the rider 2 rotates to the forward position, the rear wheel orientation mechanism is in the unlocked state through the rear wheel linkage device, and the front wheel orientation mechanism is in the locked state through the front wheel linkage device, so that the rear wheel set can rotate horizontally relative to the rear feet 1, and the front wheel set cannot rotate horizontally relative to the front feet 3.

[0090] The front wheel linkage device includes a front wheel driving member 34 that can move relative to the front feet or / and the rear feet 1, a fifth elastic member 35 arranged between the front wheel driving member 34 and the front feet 3 that can drive the front wheel driving member 34 to move towards the actuator 8, and a fourth connecting member 36 with its upper side connected to the front wheel driving member 34. The lower side of the fourth connecting member 36 is connected to the front wheel orientation mechanism, and the front wheel driving member 34 is in contact with the outer surface of the cam-shaped body 81.

[0091] The rear-wheel linkage device includes a rear-wheel driving member 16 that can move up and down relative to the front foot or / and the rear foot, a seventh elastic member 17 disposed between the rear-wheel driving member 16 and the rear foot 1 and capable of driving the rear-wheel driving member 16 to move toward the acting member 8, and a fifth connecting member 18 connected to the upper side of the rear-wheel driving member 16. The lower side of the fifth connecting member 18 is connected to a rear-wheel orientation mechanism; the rear-wheel driving member 16 contacts the outer surface of the cam-shaped body 81.

[0092] Under the action of the fifth elastic member 35 and the seventh elastic member 17, the front-wheel driving member 34 and the rear-wheel driving member 16 always remain in contact with the outer surface of the cam-shaped body 81. Thus, when the rider 2 rotates between the forward position and the backward position to drive the cam-shaped body 81 to rotate, the contact positions of the outer surface of the cam-shaped body 81 with the front-wheel driving member 34 and the rear-wheel driving member 16 rotate and change, and the front-wheel driving member 34 and the rear-wheel driving member 16 move.

[0093] In this embodiment, the radius of the base circle of the cam-shaped body 81 is smaller than the straight-line distance between the center of the base circle and the outer surface of the non-base-circle part. As Figures 7 to 9 shown, when the rider 2 is in the backward position, one side of the front-wheel linkage device (specifically, the front-wheel driving member 34) contacts the outer surface of the base circle of the acting member cam-shaped body 81, the rear-wheel linkage device (specifically, the rear-wheel driving member 16) contacts the outer surface of the non-base circle of the cam body 81, and the seventh elastic member 17 is in a compressed state. When the rider rotates to the forward position, the rear-wheel linkage device (rear-wheel driving member 16) contacts the outer surface of the base circle of the cam-shaped body, and the front-wheel linkage device (i.e., the front-wheel driving member 34) contacts the outer surface of the non-base circle of the cam-shaped body, and the fifth elastic member is in a compressed state.

[0094] When the contact position of the front-wheel driving member 34 or the rear-wheel driving member 16 with the outer surface of the body 81 rotates from the outer surface of the non-base circle to the outer surface of the base circle, the front-wheel driving member or the rear-wheel driving member moves in the direction toward the acting member 8, thereby pulling the corresponding fourth connecting member or fifth connecting member to unlock the corresponding front-wheel orientation mechanism or rear-wheel orientation mechanism; when the contact position of the front-wheel driving member 34 or the rear-wheel driving member 16 with the outer surface of the body 81 rotates from the outer surface of the base circle to the outer surface of the non-base circle, the front-wheel driving member 34 or the rear-wheel driving member 81 moves in the direction away from the acting member 8, thereby releasing the pull on the corresponding fourth connecting member or fifth connecting member, and the corresponding front-wheel orientation mechanism or rear-wheel orientation mechanism can be in a locked state.

[0095] In this embodiment, the front-wheel orientation mechanism includes a front-wheel orientation member 33 movably connected to the lower side of the front foot 3 in a vertical direction, a first engaging portion provided on the front-wheel set and adapted to cooperate with the front-wheel orientation member 33, and a sixth elastic member 37 provided between the front-wheel orientation member 33 and the front foot 3 and adapted to drive the front-wheel orientation member 33 to move downward. The lower side of the fourth connecting member is connected to the front-wheel orientation member 33. When the front-wheel driving member 34 releases the pulling force on the fourth connecting member 36, under the action of the sixth elastic member 37, the front-wheel orientation member 33 moves downward to cooperate with the first engaging portion, so that the front-wheel orientation mechanism is in a locked state and the front-wheel set cannot rotate horizontally relative to the front foot 3. When the front-wheel driving member pulls the fourth connecting member, the fourth connecting member pulls the front-wheel orientation member 33 to move upward to disengage from the first engaging portion, and the front-wheel orientation mechanism is unlocked, and the front-wheel set can rotate horizontally relative to the front foot 3.

[0096] The front-wheel set includes a front-wheel seat 31 rotatably connected to the front foot 3 horizontally and a front wheel 32 connected to the front-wheel seat 31. The first engaging portion is an upward-opening orientation hole 311 (as shown in Figure 4 the figure) provided on the front-wheel seat 31. The orientation hole 311 is the first engaging portion. When the lower side of the front-wheel orientation member 33 extends into the orientation hole 311, the front-wheel orientation mechanism is in a locked state and the front-wheel seat 31 cannot rotate horizontally relative to the front foot 3. When the front-wheel orientation member 33 moves upward to disengage from the orientation hole 311, the front-wheel orientation mechanism is unlocked and the front-wheel seat 31 can rotate horizontally relative to the front foot 3.

[0097] The rear-wheel orientation mechanism includes a rear-wheel orientation member 15 movably connected to the lower side of the rear foot 1 in a vertical direction, a second engaging portion provided on the rear-wheel set and adapted to cooperate with the rear-wheel orientation member 15, and an eighth elastic member 19 provided between the rear-wheel orientation member 15 and the rear foot 1 and adapted to drive the rear-wheel orientation member 15 to move downward. The lower side of the seventh connecting member is connected to the rear-wheel orientation member 15. When the rear-wheel driving member releases the pulling force on the fifth connecting member, under the action of the eighth elastic member, when the rear-wheel orientation member 15 moves downward to cooperate with the second engaging portion, the rear-wheel orientation mechanism is in a locked state and the rear-wheel set cannot rotate horizontally relative to the front foot 3. When the rear-wheel driving member pulls the seventh connecting member and the seventh connecting member pulls the rear-wheel orientation member 15 to move upward to disengage from the second engaging portion, the rear-wheel orientation mechanism is unlocked and the rear-wheel set can rotate horizontally relative to the rear foot 1.

[0098] The rear wheel set includes a rear wheel seat 13 rotatably connected to the rear foot 1 relative to the horizontal, and a rear wheel 14 connected to the rear wheel seat 13; the second mating part is a second directional hole 131 with an upward opening provided on the rear wheel seat 13, and the second directional hole 131 is set as the second mating part; when the lower side of the rear wheel orienting member 15 extends into the second directional hole 131, the rear wheel orienting mechanism is in a locked state, and the rear wheel seat 13 cannot rotate horizontally relative to the rear foot 1 (as shown in Figure 4 , 5 , 6), when the rear wheel orienting member 15 moves upward and disengages from the second directional hole 131, the rear wheel orienting mechanism is unlocked, and the rear wheel seat 13 can rotate horizontally relative to the rear foot 1.

[0099] A receiving hole 100 with a downward opening is provided on the lower side of the rear foot 1, the upper side of the rear wheel orienting member 15 is movably disposed in the receiving hole 100 relative to the up and down direction, and the eighth elastic member 19 is disposed between the top wall of the receiving hole 100 and the rear wheel orienting member 15. Similarly, the front foot 3, the front wheel orienting member 33, and the sixth elastic member 37 can also adopt this setting.

[0100] When the rider 2 is in the backward position, the rear wheel driving member 16 contacts the outer surface of the non-base circle of the cam body 81, so that the seventh elastic member 17 is compressed, and the rear wheel driving member 16 relaxes the upward pulling force on the fifth connecting member 18 and the rear wheel orienting member 15. Thus, under the action of the eighth elastic member 19, the rear wheel orienting member 15 has a tendency to move downward; when the second directional hole 131 on the rear wheel seat 13 is aligned with the rear wheel orienting member 15, the lower side of the rear wheel orienting member 15 is inserted into the second directional hole 131 of the front wheel seat 31, so that the rear wheel seat 13 cannot rotate horizontally, that is, the rear wheel 14 cannot rotate horizontally.

[0101] During the process of rotating the rider 2 in the backward position forward, the contact surface between the cam-shaped body 81 and the front wheel driving member 34 rotates and changes from the outer surface of the base circle to the outer surface of the non-base circle part, and the contact surface between the cam-shaped body 81 and the rear wheel driving member 16 rotates and changes from the outer surface of the non-base circle part to the outer surface of the base circle part. Thus, the front wheel driving member 34 is driven by the acting member 8 to move downward, thereby releasing the pulling force on the fourth connecting member 36. At this time, under the action of the sixth elastic member 27, when the first directional hole 311 is aligned with the front wheel orienting member 33, the front wheel orienting member 33 moves downward, and its lower side moves into the first directional hole 311 of the front wheel seat 31, so that the front wheel orienting mechanism is in a locked state; similarly, as the contact surface between the cam-shaped body 81 and the rear wheel driving member 16 changes from the outer surface of the non-base circle to the outer surface of the base circle part, under the action of the seventh elastic member 17, the rear wheel driving member 16 moves upward relative to the rear foot, so that the rear wheel orienting member 15 can be pulled upward from the second directional hole 131 of the rear wheel seat 13 through the fifth connecting member 18. When the rider 2 rotates to the forward position, as shown in Figure 19 , 20As shown, the rear wheel driving member 16 contacts the outer surface of the base circle of the cam-shaped body 81, and the front wheel directional member 33 contacts the outer surface of the non-base circle of the cam-shaped body 81. In this state, the lower side of the rear wheel directional member 15 is completely separated from the directional hole 2 131 of the rear wheel seat 13, the rear wheel directional mechanism is unlocked, and the rear wheel group can rotate horizontally, that is, the rear wheel 14 can rotate horizontally; while the rear side of the front wheel directional member 33 extends into the directional hole 1 311 of the front wheel seat 31, the front wheel directional mechanism is unlocked, and the front wheel group cannot rotate horizontally, that is, the front wheel 32 cannot rotate horizontally.

[0102] When the driver 2 wants to rotate backward from the forward position to the rearward position, the above-mentioned actions are performed in reverse, and the principle is the same.

[0103] As described above, when the rider 2 is in the backward position, the front wheel orientation mechanism is in the unlocked state, and the rear wheel orientation mechanism is in the locked state, so that the rear wheel 14 cannot rotate horizontally, and the front wheel 32 can rotate horizontally; when the rider 2 is in the forward position, the front wheel orientation mechanism is in the locked state, and the rear wheel orientation mechanism is in the unlocked state, so that the original front wheel 32 cannot rotate horizontally, and the original rear wheel 14 can rotate horizontally. That is to say, no matter where the rider 2 is, when the parents push the child stroller forward through the rider 2, the wheel set on the front side in the forward direction of the child stroller can rotate horizontally, and the wheel set on the rear side cannot rotate horizontally. In this way, when the child stroller moves forward, if there are slight obstacles on the road, such as small stones, the wheel set on the front side can rotate horizontally to avoid them, while the wheel set on the rear side maintains the original direction of travel, which can make the child stroller move more smoothly and safely. Moreover, to achieve the above functions, no additional operation is required, and the rotation of the rider 2 can automatically achieve the linkage with the relevant components, so that the operation is very simple.

[0104] Further, such as Figure 21 , 22 As shown, the cam-shaped body 81 cooperates with the front wheel linkage device, the rear wheel linkage device, the rear wheel orientation mechanism, and the front wheel orientation mechanism so that, during the folding process of the stroller of the present invention, the front wheel orientation mechanism and the rear wheel orientation mechanism always remain in the state when the rider 2 is in the rearward position, that is, the rear wheel group always remains in a state where it cannot rotate horizontally relative to the rear foot 1, and the front wheel group always remains in a state where it can rotate horizontally relative to the front foot 3.

[0105] To achieve the above purpose, in this embodiment, the body 81 includes a first cam 811 and a second cam 812 coaxially arranged on one side of the first cam 811, the second cam 812 has the same base circle diameter as the first cam 811; and the base circle portions of the first cam 811 and the second cam 812 overlap left and right (such as Figure 15 810), the non-base circle parts of the first cam 811 and the second cam 812 extending forward from the overlapped base circle parts are also overlapped left and right (as shown in FIG. Figure 15As shown in Fig. 8100, the part of the first cam 811 extending backward from the superposed base circle part is a non-base circle (such as Figure 15 As shown in Fig. 8101, the part of the second cam 812 extending backward from the superposed base circle part is a base circle, and the base circle part of the second cam 812 is located on the non-base circle part of the first cam 811; when the rider 3 is in the backward position, the front wheel orienting member 34 only contacts the outer surface of the base circle of the second cam 812, and the rear wheel orienting member 16 only contacts the outer surface of the non-base circle of the first cam 811 (such as Figures 16 to 18 shown).

[0106] Such as Figure 21 、 22 shown, because of the above settings, when the baby stroller of the present invention is folded, as the rider 2 and the acting member 8 rotate backward from the backward position, the change in the contact surface between the acting member body 81 and the front wheel actuating member 34 is only the rotational change of the specific position of the outer surface of the base circle of the second cam 812. Specifically, it rotates from the outer surface of the part where the base circle of the first cam 811 coincides with the base circle of the second cam 812 to the outer surface of the base circle of the first cam 811 located on the non-base circle part of the second cam 812, that is, the side of the front wheel actuating member 34 facing the acting member 8 also moves to the side of the non-base circle part of the second cam 812. In this way, the front wheel actuating member 34 will not move up and down relative to the front foot or the rear foot, so that the front wheel orienting mechanism always remains in the unlocked state, that is, the front wheel always remains in a state where it can rotate relative to the front foot 3. And the change in the contact surface between the acting member body 81 and the rear wheel actuating member 16 is also only the rotational change of the specific position of the outer surface of the non-base circle part of the first cam 811. Therefore, the rear wheel actuating member 16 will not move up and down relative to the front foot or the rear foot, so that the rear wheel orienting mechanism always remains in the locked state, that is, the rear wheel always remains in a state where it cannot rotate horizontally relative to the rear foot 1.

[0107] With the above settings, when the baby stroller of the present invention is folded, the front wheel 32 can rotate relative to the front foot 3 to an angle that does not interfere with the rear foot 1 and the rear wheel 14, so that the baby stroller can be made flatter and smaller in volume after being folded.

[0108] The body 81 of the acting member 8 is placed in the accommodating cavity 10, and the sides of the front wheel actuating member 34 and the rear wheel actuating member 16 facing the acting member 8 extend into the accommodating cavity 100 to contact the outer surface of the cam-shaped body 81. The through hole is coaxially arranged with the base circle of the cam-shaped body 81.

[0109] In this embodiment, a first chute and a second chute (not shown in the figure) with one end communicating with the accommodation cavity 10 are arranged inside the rear foot 1. The first chute and the second chute are respectively provided for the front-wheel driving member 16 and the rear-wheel driving member 34 to be inserted therein for relative movement. A cover plate 12 is connected to the rear foot 1, and the first chute is formed together between the cover plate 12 and the rear foot 1. During installation, first open the cover plate 12. After assembling the front-wheel driving member 16 and the rear-wheel driving member 34, then fixedly connect the cover plate 12 to the rear foot 1.

[0110] The front-wheel driving member 34 includes a first section 341 and a second section 342 extending from the first section 341 toward the acting member 8. The thickness of the second section 342 is thinner than that of the first section 341, and the outer surface of the second section 342 faces the second cam 812. Preferably, a blocking portion 340 protrudes from the side wall of the second chute. One side of the first section 341 contacts the side wall of the second chute, and the same side of the second section 342 contacts the blocking portion 340. In this way, it can be further ensured that only the outer surface of the second section 342 contacts the second cam 812.

[0111] Since the main body 21 is placed in the accommodation cavity, and the base circle of this part of the second cam 812 is located on the non-base circle part of the first cam 811, a part of the side of the first cam 811 facing the second cam 812 protrudes outside the second cam 812, so that a gap 813 is formed between the part of the first cam 811 protruding outside the second cam 812 and the bottom wall of the accommodation cavity 10. During the folding process of the baby stroller, the side of the front-wheel driving member 34 facing the acting member 8 (i.e., the side of the second section 342 facing the acting member 8) extends into the gap 813 and contacts the outer surface of the base circle of the second cam 812.

[0112] The limiting portion 82 extends from the main body 81 toward the side of the rider, that is, toward the bottom wall of the accommodation cavity 10, that is, the limiting portion 82 is arranged on the side of the second cam 812 facing the bottom wall of the accommodation cavity 10. Preferably, the outer surface of the limiting portion 82 is set not to protrude outside the outer surface of the base circle of the second cam 812. With such a setting, the limiting portion 82 and the cam-shaped main body 81 do not interfere with each other, so that the forward and backward rotation orientation of the rider 2 and the rotation locking and unlocking of the front-wheel seat 31 and the rear-wheel seat 13 do not interfere with each other; moreover, the assembly of the acting member 8 and the accommodation cavity 10 is more convenient. In this embodiment, preferably, the outer surface of the limiting portion 82 and the outer surface of the base circle of the second cam 812 are on the same outer diameter.

[0113] On one side of the rider facing the acting member 8, there is a first assembling portion 222. The acting member 8 further has a mating platform 83 on the side of the body facing the rider. Among the first assembling portion 222 and the mating platform 8, a mating square hole is recessed on one side of one of them facing the other, and the other is square and extends into the mating square hole. In this embodiment, the rider 2 has a first assembling portion 222 on the side of the bottom wall of the first tooth groove 22 facing the acting member 8, and a mating square hole 223 is recessed on the side of the first assembling portion 222 facing the acting member 8; correspondingly, the acting member 8 further has a square mating platform 83 on the side of the body 81 facing the rider 2, and the square mating platform 83 extends into the mating square hole 223. Thus, when the rider 2 rotates, the limiting member can rotate synchronously with the rider 2.

[0114] Preferably, a limiting groove 224 is provided on the inner wall of the mating square hole 223, and a corresponding limiting protrusion 831 protrudes from the outer wall of the square mating platform 83, and the limiting protrusion 831 extends into the limiting groove 224. With such a setting, not only can the rider 2 drive the rotation of the acting member 8 more synchronously when rotating, but also it is convenient for the assembly and positioning of the rider 2 and the acting member 8.

[0115] In this embodiment, the rear foot 1 protrudes from the bottom wall of the second tooth groove 12 in the direction facing the rider 2 with a hollow assembling member 121 coaxially arranged with the through hole. The through hole 11 and the hollow assembling member 121 together form an installation space 122; the side of the first assembling portion 222 facing the acting member 8 extends into the installation space 122 to be connected with the square mating platform 83. With such a setting, the assembly of the rider 1 and the acting member 8 is more stable, and interference with the gear 71 can be completely avoided. The main body 84 and the square mating platform 83 extend into the installation space 122, and the side of the first assembling portion 222 facing the acting member 8 also extends into the installation space 122 to be connected with the square mating platform 83.

[0116] The gear 71 can be moved relatively left and right around the periphery of the hollow assembling member 121, the second driving member 73 is wound around the periphery of the first assembling portion 222, and the convex platform 221 surrounds the periphery of the first assembling portion 222, so that they do not interfere with each other.

[0117] The connecting tube 45 is located on the side of the action member 8 away from the rider, and the connecting tube 45, the action member, the rear foot, and the rider are coaxially connected. Specifically, the action member 8 is also provided with a connecting hole 80 that is coaxial with the base circle and penetrates through it; during assembly, the square matching platform 83 extends into the matching square hole 223 of the first assembly part 222, and passes through the rider 2, the action member 8, and the connecting tube 45 through a connecting shaft 120, so that the rider 2, the rear foot 1, the action member 8, and the connecting tube 45 are connected, and the rider 2 and the action member 8 can rotate synchronously relative to the rear foot. In other embodiments, the hollow assembly member 121 may not be provided, and the accommodating cavity is directly connected with the second tooth groove 12 through the through hole to facilitate the connection between the rider 2 and the action member 8.

[0118] As described above, the actuator 8 can not only drive and change the horizontal rotation state of the front and rear wheels, but also can be used to locate the forward position of the driver 2.

[0119] The stroller of the present invention further comprises an armrest 9, the rear side of which is connected to the upper side of the rear leg 1. The armrest 9 can be configured to be detachably connected to the rear leg 1 or relatively rotatably connected. When the armrest is detachably connected, the armrest can be removed after the stroller is folded; when the armrest is relatively rotatably connected, the armrest can be rotated to be close to the front leg 3 or the rear leg 1 when the stroller is folded. The above configuration can reduce the overall height of the stroller of the present invention after folding, that is, reduce the overall volume. The rear side of the armrest 9 can also be configured to be fixedly connected to the rear leg 1.

[0120] like Figures 25 to 28 This is the second embodiment of the stroller of the present invention. In this embodiment, the stroller further comprises a seat backrest 91, the lower side of the seat backrest 91 is pivotally connected to the rear leg 1, and a seat backrest locking mechanism is provided between the connecting tube 45 and the rear leg 1 to limit the relative rotation of the two. The stroller further comprises a seat backrest unlocking device movably connected to the rear leg 1, the upper side of the seat backrest unlocking device is provided in cooperation with the connecting tube 45, and the lower side is provided in cooperation with the seat backrest locking mechanism. When the stroller is folded, the connecting tube 45 rotating downwardly and backward can drive the seat backrest unlocking device to move relative to the rear support 1 and unlock the seat backrest locking mechanism in linkage. In this way, the seat backrest 91 can be rotated relative to the rear leg and folded, that is, when the stroller is folded, the seat backrest 91 can also be unlocked and folded, without the need for an additional separate operation to unlock the seat backrest locking mechanism, thereby making the overall folding operation of the stroller of the present invention simpler.

[0121] In this embodiment, the first linkage member 41 - 1 is configured as a seating portion of a seat.

[0122] Preferably, the rear side of the first linkage member 41-1 is coaxially pivoted to the rear leg 1 with the lower side of the backrest 91. This arrangement makes the overall assembly easier.

[0123] The backrest unlocking device and the backrest locking mechanism may have the structure described in the Chinese invention patent application (application number: 2024100369715, applicant: January 9, 2024, patent title: "A baby stroller"), or may have any other well-known and feasible structure, which is not the inventive point of the present invention, so it will not be elaborated here.

[0124] The connection of the third linkage 5, the front foot 3, the rider 2 and other components of the baby stroller is the same as that in the first embodiment, and the cooperation between the acting member 8 and the front wheel driving member 34 and the rear wheel driving member is also the same as that in the first embodiment, so it will not be elaborated here.

[0125] Those skilled in the art should understand that the above terms such as "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. In the above description, the position where the front wheel is located is the front, the position where the rear wheel is located is the back, the position where the rider is located is the upper, the positions where the front wheel and the rear wheel are located are the lower, and the rider and the connecting pipe are respectively located on the left and right sides of the rear foot. The above description is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. When the observation visual angle changes, the above orientation or position relationship will also change accordingly. Therefore, it should not be understood as a limitation to the present invention.

Claims

1. A baby stroller that can be switched between an unfolded state and a folded state, characterized in that: The child stroller includes a rear foot, a rider, a front foot, and a connecting tube. The rear side of the front foot is pivotally connected to the front side of the rear foot, and the lower sides of the rider and the connecting tube are pivotally connected to the rear foot and / or the front foot. A first locking mechanism for limiting relative rotation between the lower side of the connecting tube and the rear foot or the front foot is provided. The rider is provided with a first unlocking device, which is cooperated with the first locking mechanism. The first unlocking device can be driven to unlock the first locking mechanism.

2. The baby stroller according to claim 1, wherein: After the first locking mechanism is unlocked, the rotating rider can drive the connecting tube to rotate in the same direction; preferably, a second locking mechanism for limiting the relative rotation of the rider's lower side and the rear foot or the front foot is provided between the rider and the second locking mechanism, and a second unlocking device for unlocking the second locking mechanism is provided between the rider and the second locking mechanism; preferably, the second unlocking device is connected to the first unlocking device, and the two are configured so that when the first unlocking device is driven to unlock the first locking device, the second unlocking device can be linked to unlock the second locking mechanism.

3. The stroller for children according to claim 2, wherein: The rider is configured to be rotatable between a rearward position and a forward position. When the stroller is in the unfolded state, the rider can rotate between the forward position and the rearward position after unlocking the second locking mechanism by driving the second unlocking device. Preferably, the second unlocking device and the first unlocking device are further configured so that when the second unlocking device is driven to unlock the second locking mechanism, the first unlocking device is not linked to unlock the first locking device. Preferably, the first unlocking device and the first locking mechanism are configured to be detachably matched. When the rider is in the rearward position, the first unlocking device matches the first unlocking mechanism, and the first unlocking device can be driven to unlock the first locking mechanism. When the rider is in the forward position, the first unlocking device is disengaged from the first unlocking mechanism, and the first unlocking device cannot be driven to unlock the first locking mechanism.

4. The stroller for children according to claim 1 or 2 or 3, characterized in that: The first unlocking device comprises a first driving member connected to the rider so as to be relatively movable up and down, a first adapter connected to the first driving member on one side and movable up and down therewith, and the other side of the first adapter is connected to the first locking mechanism; when the first driving member moves upward, the first adapter is driven to move upward to unlock the first locking mechanism; preferably, a third elastic member is provided between the first driving member and the rider to drive the first driving member to move downward; preferably, a first driving device capable of driving the first unlocking device to unlock the first locking mechanism is provided on the rider, the first driving device comprises a first driving group movably arranged on the rider, a first connecting member connected to the first driving group on the upper side, the first connecting member is connected to the first driving member on the lower side, and the first driving member can be pulled upward by the first connecting member by operating the first driving group; preferably, the child stroller comprises a push handle pivotally connected to the upper side of the rider on the lower side, the push handle is provided as the first driving group, and the push handle is provided so that the first connecting member can be pulled upward by rotating the push handle downward, thereby pulling the first driving member upward.

5. The baby stroller according to any one of claims 1 to 4, characterized in that: A second adapter that can cooperate with the first adapter is connected to the connecting pipe. The second adapter is connected to the connecting pipe so as to be movable up and down relatively, and the second adapter is connected to the first locking mechanism. When the first adapter is connected to the second adapter, the upward movement of the first adapter can drive the second adapter to move upward to unlock the first locking mechanism. When the rider rotates backward and downward, the connecting pipe can be driven to rotate backward and downward together through the connection between the first adapter and the second adapter. Preferably, the first adapter and the second adapter are detachably connected. When the rider is in the backward position, the first adapter is connected to the second adapter. When the rider is in the forward position, the first adapter is disconnected from the second adapter.

6. The stroller for children according to any one of claims 1 to 5, characterized in that: The first locking mechanism includes a first locking member that is connected to the connecting pipe so as to be movable up and down relatively, a first elastic member disposed between the first locking member and the connecting pipe, and a first locking groove with an upward opening disposed on the rear foot or the front foot. When the baby stroller is in the unfolded state, under the action of the first elastic member, the first locking member moves downward and the lower side extends into the first locking groove, and the first locking mechanism is in the locked state. Preferably, the second adapter is connected to the first locking member and the two can move up and down together relative to the connecting pipe.

7. The stroller for children according to claim 4 or 5 or 6, characterized in that: The second unlocking device includes a third driving member that is disposed on the rider so as to be movable up and down relatively, a second connecting member with its upper end connected to the third driving member, and a second driving member connected to the lower end of the second connecting member. The second driving member is cooperatively disposed with the second locking mechanism. Moving the third driving member upward can drive the second connecting member to drive the second driving member to unlock the second locking mechanism. Preferably, a second driving device for driving the second unlocking device to unlock the second locking mechanism is further disposed on the rider. Preferably, the second driving device includes a second driving group movably connected to the rider and a third connecting member with its upper end connected to the second driving group. The lower end of the third connecting member is connected to the third driving member. Driving the second driving group to move can pull the third driving member upward through the third connecting member, thereby unlocking the second locking mechanism. Preferably, the second driving group is set as an unlocking member that is connected to the rider so as to be movable up and down relatively.

8. The stroller for children according to claim 7, characterized in that: The third driving member is connected to the first driving member so as to be movable up and down relatively, and the two are set such that the upward movement of the third driving member can drive the first driving member to move upward together. Preferably, when the third driving member moves upward, the first driving member is not driven to move upward. Preferably, the third driving member is provided with a long hole extending vertically. Part of the first driving member or / and the first adapter can move up and down relatively through the long hole. When the second locking mechanism is in the locked state, part of the first driving member or / and the first adapter contacts the top wall of the long hole of the third driving member.

9. The stroller for children according to any one of claims 2 to 8, characterized in that: The connecting pipe, the rear foot, and the rider are coaxially pivotally connected to the front foot and / or the rear foot; preferably, the connecting pipe and the lower side of the rider are both pivotally connected to the rear foot, the first locking mechanism is arranged between the connecting pipe and the rear foot, the second locking mechanism is arranged between the opposite sides of the rider and the rear foot, and the lower side of the connecting pipe is pivotally connected to the side of the rear foot away from the rider; preferably, the second locking mechanism includes a first tooth groove, a second tooth groove respectively arranged on the opposite sides of the rider and the rear foot, a gear movably arranged left and right in the first tooth groove and the second tooth groove, and a second elastic member arranged between the bottom wall of the second tooth groove and the gear; under the action of the second elastic member, the gear meshes with the first tooth groove and the second tooth groove at the same time, and the second locking mechanism is in a locked state, and the rider cannot rotate relative to the rear foot; preferably, the second driving member is rotatable relative to and movably arranged left and right between the bottom wall of the first tooth groove and the gear; a matching driving part and driven part are respectively arranged on the opposite sides of the bottom wall of the first tooth groove and the second driving member; when the third driving member is moved upward, the second driving member can be pulled to rotate through the second connecting member. When the second driving member rotates, through the cooperation of the driving part and the driven part, the second driving member moves in the direction of the gear while rotating, thereby pushing the gear to move in the direction of the second tooth groove. When the gear disengages from the first tooth groove and only meshes with the second tooth groove, the second locking mechanism is unlocked.

10. The stroller for children according to any one of claims 2 to 9, characterized in that: A working member rotatable together with the rider is connected to the lower side of the rider; preferably, a limiting structure cooperatively arranged with the working member is arranged on the rear foot. When the rider rotates forward from the rear position to the forward position, the cooperation between the working member and the limiting structure prevents the rider from rotating forward any further.

11. The stroller for children according to claim 10, characterized in that: A receiving cavity communicating with the rider is arranged on the side of the rear foot facing the connecting pipe, and the working member is rotatably placed in the receiving cavity; preferably, an arc-shaped limiting groove with non-connected ends is recessed on the bottom wall of the receiving cavity, and the limiting groove is set as the limiting structure; the working member includes a limiting part rotatably placed in the arc-shaped limiting groove. When the rider is in the forward position, the limiting part abuts against one end of the limiting groove, so that the rider cannot rotate forward any further; preferably, the connecting pipe, the working member, the rear foot, and the rider are coaxially connected.

12. The stroller for children according to claim 10 or 11, characterized in that: The front foot and the rear foot are respectively connected with a front wheel set and a rear wheel set that can rotate horizontally at the lower sides; a front wheel orientation mechanism and a rear wheel orientation mechanism for restricting the relative horizontal rotation of the corresponding two are respectively arranged between the front foot and the front wheel set and between the rear foot and the rear wheel set, and a front wheel linkage device and a rear wheel linkage device are respectively arranged between the front wheel orientation mechanism, the rear wheel orientation mechanism and the working member; the working member includes a body, and the body is set in a cam shape. The front wheel linkage device and the rear wheel linkage device are both in contact with the outer surface of the cam-shaped body on the side facing the working member; during the rotation and direction change of the rider, the contact positions of the front wheel linkage device and the rear wheel linkage device with the outer surface of the cam-shaped body rotate and change, thereby changing the unlocked state or locked state of the front wheel orientation mechanism and the rear wheel orientation mechanism.

13. The stroller for children according to claim 12, wherein: When the rider rotates to the rearward position, the rear wheel linkage drives the rear wheel orientation mechanism to switch to the locked state, and the front wheel linkage drives the front wheel orientation mechanism to switch to the unlocked state; when the rider rotates to the forward position, the rear wheel linkage drives the rear wheel orientation mechanism to be in the unlocked state, and the front wheel linkage drives the front wheel orientation mechanism to be in the locked state; preferably, the cooperation of the cam-shaped body with the front wheel linkage, the rear wheel linkage, the rear wheel orientation mechanism, and the front wheel orientation mechanism is set such that during the folding process of the stroller, when the rider rotates relative to the front and rear feet, the rear wheel orientation mechanism remains in the locked state and the front wheel orientation mechanism remains in the unlocked state.

14. The stroller for children according to any one of claims 1 to 13, characterized in that: The connecting tube can be used to connect to the periphery of the front side of a seat fabric; preferably, the stroller further includes a linkage folding device disposed between the rear feet, the front feet and the connecting tube or between the rear feet, the front feet and the rider, and the linkage folding device is configured such that when folding the stroller, when the rider and the connecting tube rotate downward and backward, the front feet and the rear feet can be driven to rotate closer to each other through the linkage folding device.

Images