A multi-functional stroller with smooth pushing

Abstract

The utility model discloses a kind of multifunctional children's stroller of pushing smoothly, including stroller body, push handle and seat positioning mechanism;Seat positioning mechanism is arranged at the bottom rear end of stroller body;Push handle includes outer sleeve, inner sleeve, handle, telescopic adjusting assembly and the locking assembly of being arranged at the bottom end of inner sleeve;Telescopic adjusting assembly is used to control the locking between locking assembly relative to outer sleeve 117 or not;A kind of multifunctional children's stroller of pushing smoothly provided by the utility model is simultaneously provided with seat positioning mechanism and single-hand convenient adjustable length and prevent false touch push handle, improve the stability of stroller in bumpy and uphill pavement movement posture.

Description

Technical Field

[0001] This utility model belongs to the field of children's stroller technology, specifically relating to a multifunctional children's stroller that can be pushed smoothly. Background Technology

[0002] The multi-functional stroller can make a wave-like motion when pushed, making it fun and exciting for children sitting in it, and increasing their enjoyment of playing.

[0003] A multi-functional children's stroller is currently available, as described in patent publication number CN101492066A. This multi-functional stroller has two modes: flat walking and rocking. In rocking mode, pushing the handle rotates the rear drive wheel, which in turn rotates the drive shaft that is tightly connected to it. The drive shaft then rotates the drive gear, which in turn rotates the driven gear through the idler gear, causing the crank shaft and crank to rotate synchronously. The crank, through a connecting rod, causes the carrier body to undulate. Combined with the action of the front rocking mechanism, the carrier body oscillates back and forth, ultimately resulting in a regular up-and-down and back-and-forth oscillation motion. In flat walking mode, axially moving the idler gear frame, opening the idler gear frame, or operating the clutch mechanism disengages the transmission mechanism. In this mode, pushing the handle does not cause the carrier body to move.

[0004] However, the aforementioned multi-functional stroller may experience unstable movement when pushed uphill or on bumpy roads. On the one hand, because the length of the handle is not adjustable, it cannot accommodate the height of the parents, requiring more force to push and making it difficult to control the direction of the stroller. On the other hand, when the stroller is in flat-walking mode, because the position of the bend is not fixed, the seat on the carrier will shake and bounce when the child is sitting in the stroller, resulting in unstable movement of the stroller.

[0005] Furthermore, the existing stroller handle length adjustment buttons are generally located on the handle bar, which makes it inconvenient to adjust the handle length while pushing the stroller. If the length adjustment button is located on the handle, it is easy to accidentally activate it during the pushing process, especially on bumpy roads or uphill, when you need to hold the stroller handle tightly, which will further affect the stability of the stroller. Utility Model Content

[0006] In view of this, the present invention provides a multi-functional children's stroller that is easy to push, and adopts a push handle that is easy to adjust in length and prevents accidental contact, and a horizontal positioning mechanism to improve the stability of the stroller's movement posture (i.e., left and right movement direction and up and down bump amplitude) on bumpy and uphill roads.

[0007] This utility model is achieved through the following technical solution:

[0008] A multi-functional stroller that allows for smooth pushing includes a stroller body, a push handle, and a seat positioning mechanism;

[0009] The seat positioning mechanism is located at the bottom rear end of the trolley body;

[0010] The push handle includes an outer sleeve, an inner sleeve, a grip, a telescopic adjustment assembly, and a locking assembly located at the bottom of the inner sleeve;

[0011] The telescopic adjustment assembly includes a toggle button, mounting base I, sliding pin I, and push rod;

[0012] Mounting base I is fitted inside the inner sleeve; the toggle button is located on the top of the handle, and the bottom of the toggle button extends into mounting base I; the toggle button can move longitudinally.

[0013] The mounting base I is provided with a horizontal sliding groove I, and the inner sleeve is provided with a right-angle sliding groove; the right-angle sliding groove includes a horizontal groove and a vertical groove, with the end of the vertical groove facing the bottom of the inner sleeve;

[0014] The sliding pin I is provided with a toggle button, a horizontal slide groove I, and a right-angle slide groove along its horizontal direction;

[0015] One end of the push rod abuts against the bottom of mounting base I, and the other end abuts against the locking assembly, realizing the transmission between the toggle button and the locking assembly; a spring I is provided inside the locking assembly, which can push the push rod upward;

[0016] When the toggle button is moved horizontally and pressed vertically, causing the sliding pin I to be located at the bottom of the vertical groove of the right-angle slide, the locking component is unlocked from the outer sleeve, and the inner sleeve component can slide relative to the outer sleeve.

[0017] When the horizontal toggle button is moved so that the sliding pin I is at the end of the horizontal groove of the right-angle slide, the locking assembly locks with the outer sleeve.

[0018] Furthermore, the telescopic adjustment assembly also includes a guide rod and spring II;

[0019] The guide rod is set laterally within the mounting base I and can move longitudinally; the guide rod is perpendicular to the sliding pin I; the guide rod is also fitted with a toggle button, which can move along the length of the guide rod.

[0020] Spring II is sleeved on the outer periphery of the guide rod and located on the side of the vertical groove of the right-angle slide; one end of spring II abuts against the inner wall of mounting seat I, and the other end abuts against the toggle button.

[0021] Furthermore, the locking assembly also includes mounting base II, telescopic collet, sliding pin II, mounting sleeve, and fixing pin;

[0022] The bottom end of the mounting cylinder is fixed to the inner sleeve, and the two opposite sides of the mounting base II are provided with inclined sliding grooves; the mounting base II is installed inside the mounting cylinder, and the two opposite sides of the mounting cylinder are provided with transverse sliding grooves II; the telescopic clamp is set inside the mounting base II, and the sliding pin II passes through the transverse sliding groove II, the inclined sliding grooves and the telescopic clamp;

[0023] Mounting base II is provided with a through hole I for telescopic head extension and retraction. The height of the inclined slide groove facing through hole I is lower than that of the other end. Mounting cylinder is provided with a through hole II for telescopic head extension and retraction.

[0024] The bottom of the mounting cylinder is closed. Spring I is set inside the mounting cylinder, with one end abutting against the inner bottom surface of the mounting cylinder and the other end abutting against the bottom surface of the mounting base II; the bottom end of the push rod abuts against the mounting base II.

[0025] The outer sleeve has several locking holes distributed along its length, and the telescopic locking head can be engaged with these locking holes.

[0026] Furthermore, the bottom of the mounting cylinder is provided with flange II, and the top of the mounting cylinder extends into the inner sleeve. The outer diameter of flange II is larger than the outer diameter of the inner sleeve.

[0027] The top of the outer tube is fixedly connected to a limiting sleeve, which can pull the flange II of the inner cylinder assembly to abut against the limiting sleeve.

[0028] Furthermore, the seat positioning mechanism includes a housing, a spring, a sliding sleeve I, and a lever;

[0029] The trolley body includes a drive wheel, a carrier, a base frame, a rocking structure, a crank, and a crankshaft;

[0030] The swing structure is set between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier and the lower end is pinned to the vehicle chassis.

[0031] The drive shaft is rotatably mounted on the chassis, and the drive wheel is coaxially and fixedly connected to the drive shaft. A drive wheel is also coaxially mounted on the drive shaft, and the crank and driven wheel are both fixedly connected to the crankshaft. The drive wheel and driven wheel are driven by a transmission mechanism. The crank is pin-connected to the carrier of the multi-functional stroller, and the seat is located on the carrier.

[0032] Sleeve I is coaxially sleeved on the crankshaft and adjacent to the driven wheel; spring is coaxially limited on the side of sleeve I away from the driven wheel and abuts against sleeve I;

[0033] The housing is provided with a sliding groove, which is arranged axially along the crankshaft; the sliding sleeve I is provided with a slider, which is located inside the sliding groove;

[0034] The housing has a through hole, through which the lever passes. The part of the lever inside the housing is hinged to the housing. The lever also has a protrusion I and a groove I on the sliding sleeve I. The protrusion I and the groove I are connected in a mating manner. The through hole has a locking groove.

[0035] When the multi-functional stroller is rocking, the lever is in the locking groove, the spring is compressed, and the sliding sleeve I is disengaged from the driven wheel.

[0036] When the seat of the multi-functional stroller is in position, the lever disengages from the locking groove, and the lever can rotate along the hinge point. Under the action of the spring force, the sliding sleeve I engages with the driven wheel.

[0037] Furthermore, a limiting boss is provided on the driven wheel, and a limiting groove is provided on the sliding sleeve I.

[0038] When the limiting groove and the limiting boss are engaged, the seat is level.

[0039] Furthermore, a sliding sleeve II is also coaxially mounted on the drive shaft;

[0040] A guide block is fixedly installed on the drive shaft, and a guide groove I is provided on the inner circumference of the sliding sleeve II. The guide block is located in the guide groove I, so that the sliding sleeve II can slide along the drive shaft.

[0041] The drive wheel is rotatably connected to the drive shaft. The end of the drive wheel facing the sliding sleeve II is provided with several guide bosses distributed along the circumference. The end of the sliding sleeve II facing the drive gear is provided with several guide grooves II distributed along the circumference. The guide bosses and guide grooves II are both axial in length direction, and the guide bosses and guide grooves II can be matched one-to-one.

[0042] The lever has a protrusion II in the middle, and protrusion II is located on the side of the hinge point opposite to protrusion I; the sliding sleeve II has a groove II; protrusion II and groove II cooperate.

[0043] When the multi-functional stroller is rocking, the guide groove II of the slide sleeve II engages with the guide boss;

[0044] When the multi-functional stroller is in a horizontal position, the sliding sleeve II moves away from the drive wheel, and the guide boss disengages from the guide groove II.

[0045] Furthermore, the through hole includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion III extending towards the end of the second hole segment is provided at the corner. The protrusion III and the sidewall of the adjacent second hole segment form the aforementioned locking groove.

[0046] Furthermore, the push handle is fixedly connected to the middle of the rear end of the housing, the through hole is located on one side of the push handle, and the lever is a curved lever.

[0047] Furthermore, the thickness at the hinge point of the lever is greater than the thickness of the handle.

[0048] Beneficial effects:

[0049] (1) This utility model provides a multi-functional children's stroller that is easy to push, and is equipped with a seat positioning mechanism and a push handle that is easy to adjust with one hand and prevents accidental touch, thereby improving the stability of the stroller's movement posture (i.e., left and right movement direction and up and down bump amplitude) on bumpy and uphill roads.

[0050] (2) The telescopic adjustment component of the push handle in this utility model also includes a guide rod and a spring II; when the sliding pin I moves to the connection between the horizontal groove and the vertical groove of the right angle slide, the push button can be pushed in the direction of the horizontal groove so that the sliding pin I automatically enters the end of the horizontal groove of the right angle slide, making it easier to adjust the length of the push handle with one hand when pushing.

[0051] (3) This utility model converts the longitudinal movement of the mounting base into the lateral movement of the telescopic locking head by setting the inclined sliding groove of the mounting base II and the transverse sliding groove II on the mounting cylinder, thereby achieving locking between the locking components and the outer sleeve. Furthermore, due to the setting of the spring I, when the telescopic locking head is aligned with the locking hole of the outer sleeve, the telescopic locking head can automatically extend, achieving automatic pop-out locking, avoiding complicated operation steps, and is especially suitable for one-handed operation scenarios.

[0052] (4) The flange II of the inner cylinder assembly can be pulled to abut against the limiting sleeve. The limiting sleeve prevents the inner cylinder assembly from being pulled out of the outer cylinder.

[0053] (5) When the limiting groove and the limiting boss are engaged, the seat is horizontal, which can ensure that the seat is positioned in a horizontal position to ensure the comfort and stability of the child.

[0054] (6) The seat positioning mechanism of this utility model, through the setting of spring, sliding sleeve I and lever, can limit and fix the seat in the flat walking mode or when children get on and off the vehicle, so as to ensure the stability of the seat.

[0055] (7) The present invention has a protrusion II in the middle of the lever, and a drive wheel and a sliding sleeve II are coaxially arranged on the drive shaft; so that the lever can simultaneously position the seat and release the drive wheel and driven wheel, and the lever can simultaneously release the seat and restore the drive wheel and driven wheel, which facilitates the switching between rocking mode and flat walking mode of the multi-functional children's stroller.

[0056] (8) When it is necessary to release the seat positioning, the lever only needs to be moved away from the locking groove and made parallel to the first hole section. The lever will automatically enter the first hole section under the action of the spring. When it is necessary to position the seat, the lever only needs to be moved to the position of the second hole section parallel to the locking groove. The lever will automatically enter the locking groove under the action of the spring, which is convenient for adults to adjust the seat position.

[0057] (9) The push handle of this utility model is fixedly connected to the middle of the rear end of the housing. The through hole is located on one side of the push handle. The lever is a curved lever. The setting of the curved lever does not interfere with the push handle being set in the middle of the rear end of the housing, ensuring the uniformity of the force on the trolley when pushing it.

[0058] (10) The thickness of the lever hinge point is greater than the thickness of the handle. The greater thickness of the hinge point can ensure the hinge strength between the lever and the housing. The smaller thickness of the handle can realize the elastic deformation of the handle. Since the seat positioning mechanism is set at the bottom rear end of the trolley body, it is convenient to use the foot to move the handle, and the handle can be more smoothly and conveniently locked into the locking groove or removed from the locking groove. Attached Figure Description

[0059] Figure 1 A schematic diagram showing the positions of the push handle and seat positioning mechanism on the trolley;

[0060] Figure 2 An exploded view of the push handle;

[0061] Figure 3 for Figure 2 A magnified view of part A;

[0062] Figure 4 Assembly drawing of the inner cylinder assembly;

[0063] Figure 5 for Figure 4 The C-direction view;

[0064] Figure 6 Diagram of the toggle button structure;

[0065] Figure 7 For the guide component structure diagram;

[0066] Figure 8 for Figure 2 A magnified view of part B;

[0067] Figure 9 Exploded view of the locking component;

[0068] Figure 10 The structure is that of an outer sleeve;

[0069] Figure 11 This is a structural diagram of the horizontal positioning mechanism of this utility model;

[0070] Figure 12 This is a schematic diagram of the structure of the shell of this utility model;

[0071] Figure 13 This is a structural diagram of the driven gear of this utility model;

[0072] Figure 14 This is the structure of the sliding sleeve I of this utility model. Figure I ;

[0073] Figure 15 This is the structure of the sliding sleeve I of this utility model. Figure II ;

[0074] Figure 16 This is a structural diagram of the through hole in this utility model;

[0075] Figure 17 This is the front view of the lever of this utility model;

[0076] Figure 18 This is a left view of the lever of this utility model;

[0077] Figure 19 This is the structure of the sliding sleeve II of this utility model. Figure I ;

[0078] Figure 20 This is the structure of the sliding sleeve II of this utility model. Figure II ;

[0079] Figure 21 This is an example diagram of the drive shaft and drive wheel of this utility model.

[0080] Among them, 1-push handle, 101-right grip, 102-toggle button, 1021-guide hole, 1022-pin hole, 1023-flange I, 103-guide rod, 104-mounting base I, 1041-guide groove I, 1042-transverse slide groove I, 1043-push rod top seat, 105-sliding pin I, 106-inner sleeve, 1061-right angle slide groove, 107-push rod, 108-push rod base, 109-mounting base II, 1091-slant Slide groove, 1092-opening groove, 1093-through hole I, 110-telescopic locking head, 111-sliding pin II, 112-spring I, 113-mounting cylinder, 1131-transverse slide groove II, 1132-flange II, 1133-through hole, 1134-fixing hole, 114-fixing pin, 115-left grip, 116-limiting sleeve, 117-outer sleeve, 1171-locking hole, 118-spring buckle, 119-limiting groove, 120-spring II;

[0081] 2-Spring, 3-Sliding sleeve I, 31-Limiting groove, 32-Slider, 33-Groove I, 4-Driven wheel, 41-Limiting boss, 5-Crank, 6-Transmission mechanism, 7-Drive wheel, 8-Pulley, 81-Protrusion I, 82-Pin hole, 83-Handle, 84-Protrusion II, 9-Drive wheel, 10-Pin, 11-Limiting component, 12-Sliding groove, 13-Fixed seat, 14-Drive shaft, 15-Through hole, 151-Protrusion III, 152-Locking groove, 16-Sliding sleeve II, 161-Guide groove I, 162-Guide groove II, 163-Groove II, 17-Housing, 18-Guide block, 19-Guide boss, 20-Crankshaft, 21-Seat positioning mechanism. Detailed Implementation

[0082] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0083] Example 1:

[0084] This embodiment provides a multi-functional stroller that is stable to push; see attached document. Figure 1 It includes the trolley body, the push handle 1, and the seat positioning mechanism 21;

[0085] The seat positioning mechanism 21 is located at the bottom rear end of the trolley body and is used to limit and fix the seat in the flat walking mode.

[0086] See appendix Figure 1-5 The push handle 1 includes an inner cylinder assembly and an outer cylinder 117;

[0087] The inner cylinder assembly includes an inner sleeve 106, a handle, a telescopic adjustment assembly, and a locking assembly disposed at the bottom end of the inner sleeve 106; the telescopic adjustment assembly is used to control whether the locking assembly is locked relative to the outer sleeve 117.

[0088] The telescopic adjustment assembly includes a toggle button 102, a mounting base I 104, a sliding pin I 105, and a push rod 107;

[0089] Mounting base I 104 is fitted inside the inner sleeve 106; toggle button 102 is located on the top of the handle, and the bottom of toggle button 102 extends into mounting base I 104; toggle button can move longitudinally.

[0090] The mounting base I104 is provided with a transverse sliding groove I1042, and the inner sleeve 106 is provided with a right-angle sliding groove 1061; the right-angle sliding groove 1061 includes a horizontal groove and a vertical groove, with the end of the vertical groove facing the bottom end of the inner sleeve 106.

[0091] A sliding pin I105 is provided with a toggle button 102, a transverse slide groove I1042 and a right-angle slide groove 1061 passing through it laterally;

[0092] One end of the push rod 107 abuts against the bottom of the mounting base I 104, and the other end abuts against the locking assembly, realizing the transmission between the toggle button 102 and the locking assembly; a spring I 112 is provided inside the locking assembly, which can push the push rod 107 upward;

[0093] When the toggle button 102 is moved horizontally and pressed vertically, so that the sliding pin I 105 is located at the bottom of the vertical groove of the right-angle slide groove 1061, the locking component is unlocked from the outer sleeve 117, and the inner sleeve component can slide relative to the outer sleeve 117 to adjust the length of the push handle.

[0094] When the horizontal toggle button is moved so that the sliding pin I105 is located at the end of the horizontal groove of the right-angle slide groove 1061, the locking assembly locks with the outer sleeve 117, and the length of the push handle is fixed.

[0095] This embodiment provides a multi-functional stroller that is easy to push, and is equipped with a seat positioning mechanism 21 and a push handle that is easy to use with one hand, adjustable in length and prevents accidental contact, thereby improving the stability of the stroller's movement posture (i.e., left and right movement direction and up and down bump amplitude) on bumpy and uphill roads.

[0096] The principle of preventing accidental activation of the push handle length adjustment: Due to the setting of the right angle slide groove 1061, the push handle needs to be toggled and pressed to unlock the locking component from the outer sleeve 117. Due to the setting of the spring I 112, when the toggle button 102 is released, the sliding pin I 105 can automatically move upward to the connection of the horizontal and vertical grooves of the right angle slide groove 1061. The toggle button 102 can be set at the top of the handle to facilitate one-handed adjustment of the push handle length while preventing accidental activation.

[0097] Example 2:

[0098] This embodiment is based on Embodiment 1, see Appendix Figure 2 and 3 The telescopic adjustment assembly of push handle 1 also includes guide rod 103 and spring II 120;

[0099] The guide rod 103 is arranged laterally in the mounting base I 104 and can move longitudinally; the guide rod 103 is perpendicular to the sliding pin I 105; the guide rod 103 is also provided with a toggle button 102, which can move along the length of the guide rod 103.

[0100] Spring II 120 is sleeved on the outer periphery of guide rod 103 and located on the side of the vertical groove of right angle slide 1061; one end of spring II 120 abuts against the inner wall of mounting base I 104 and the other end abuts against toggle button 102;

[0101] In this embodiment, the guide rod 103 can guide the lateral movement of the toggle button 102 while moving longitudinally along with it. The spring 120 can push the toggle button 102 in the direction of the horizontal groove when the sliding pin 105 moves to the connection between the horizontal and vertical grooves of the right-angle slide groove 1061. This allows the sliding pin 105 to automatically enter the end of the horizontal groove of the right-angle slide groove 1061, making it easier to adjust the length of the push handle with one hand when pushing.

[0102] See appendix Figure 3 and 6 The grip includes a left grip 115 and a right grip 101. Both the left grip 115 and the right grip 101 are provided with a limiting groove 119. The toggle button 102 is provided with a flange I 1023 in the longitudinal middle, and the flange I 1023 is engaged in the limiting groove 119. The top of the limiting groove 119 is provided with a notch, and the head of the toggle button 102 extends out of the notch.

[0103] The bottom of the toggle button 102 is provided with two pin ears, each with a pin hole 1022. A connecting plate is provided between the two pin ears, and a guide hole 1021 is provided on the connecting plate. The guide rod 103 passes through the guide hole 1021; the sliding pin I 105 passes through the pin hole 1022.

[0104] See appendix Figure 3 and 7 The top inner wall of the mounting base I104 is provided with longitudinal guide grooves I1041 on both opposite sides. The two ends of the guide rod 103 are respectively engaged in the corresponding guide grooves I1041, so that the guide rod 103 can move longitudinally.

[0105] A push rod top seat 1043 is provided at the bottom center of the mounting base I 104. The top end of the push rod 107 extends into the push rod top seat 1043. The push rod top seat 1043 is used to fix the top end of the push rod 107 to ensure effective transmission of thrust.

[0106] The locking component may be a locking component of the prior art. See the appendix for a specific embodiment. Figure 8 and 9 The locking assembly also includes mounting base II 109, telescopic locking head 110, sliding pin II 111, mounting cylinder 113 and fixing pin 114;

[0107] The mounting cylinder 113 is fixed to the bottom end of the inner sleeve 106. The mounting base II 109 is provided with inclined sliding grooves 1091 on two opposite sides. The mounting base II 109 is installed inside the mounting cylinder 113. The mounting cylinder 113 is provided with transverse sliding grooves II 1131 on two opposite sides. The telescopic locking head 110 is provided inside the mounting base II 109. The sliding pin II 111 passes through the transverse sliding grooves II 1131, the inclined sliding grooves 1091 and the telescopic locking head 110.

[0108] Mounting base II 109 is provided with a through hole I 1093 for telescopic head 110 to extend and retract. The height of one end of the inclined slide groove 1091 facing through hole I 1093 is lower than the other end. Mounting cylinder 113 is provided with a through hole II 1133 for telescopic head 110 to extend and retract.

[0109] The bottom of the mounting cylinder 113 is closed, and the spring I 112 is set inside the mounting cylinder 113, with one end abutting against the inner bottom surface of the mounting cylinder 113 and the other end abutting against the bottom surface of the mounting seat II 109; the bottom end of the push rod 107 abuts against the mounting seat II 109.

[0110] See appendix Figure 9 The outer sleeve 117 is provided with a number of locking holes 1171 distributed along the length direction, and the telescopic locking head 110 can cooperate with the locking holes 1171.

[0111] In this embodiment, when the push rod 107 is pushed downward, the mounting base II 109 moves downward relative to the mounting cylinder 113. Due to the restriction of the transverse sliding groove II 1131 on the mounting cylinder 113, the sliding pin II 111 moves away from the through hole I 1093 along the inclined sliding groove 1091, causing the telescopic locking head 110 to retract, releasing the cooperation between the telescopic locking head 110 and the locking hole 1171 of the outer sleeve 117, thereby realizing the unlocking of the locking component relative to the outer sleeve 117.

[0112] When the inner cylinder assembly is adjusted to the appropriate length by pushing the handle, the telescopic locking head 110 is aligned with a locking hole 1171 on the outer sleeve 117. Without pressing the button, under the action of the spring II 120, the mounting base II 109 moves upward relative to the mounting cylinder 113. Due to the restriction of the transverse sliding groove II 1131 on the mounting cylinder 113, the sliding pin II 111 moves along the inclined sliding groove 1091 close to the through hole I 1093, causing the telescopic locking head 110 to extend. The telescopic locking head 110 engages with the locking hole 1171 on the outer sleeve 117, and the locking assembly locks relative to the outer sleeve 117.

[0113] In another embodiment, the locking assembly further includes a push rod base 108, which is disposed between the push rod 107 and the mounting base II 109. A boss is provided at the top center of the push rod base 108, and a groove is provided at the top of the boss. The bottom end of the push rod 107 is engaged with the groove.

[0114] For further details, please see the appendix. Figure 9 The top of the mounting base II 109 is provided with an opening groove 1092, and the mounting cylinder 113 is provided with a fixing hole 1134. The fixing pin 114 passes through the inner sleeve 106, the fixing hole 1134 and the opening groove 1092 in sequence to realize the fixed connection between the inner sleeve 106 and the mounting cylinder 113, and the fixing pin 114 can slide in the opening groove 1092.

[0115] The bottom of the mounting cylinder 113 is provided with a flange II 1132, and the top end of the mounting cylinder 113 extends into the inner sleeve 106. The outer diameter of the flange II 1132 is larger than the outer diameter of the inner sleeve 106; see appendix. Figure 2 The top end of the outer sleeve is fixedly connected to a limiting sleeve 116, which can pull the flange II 1132 of the inner cylinder assembly to abut against the limiting sleeve 116. The limiting sleeve prevents the inner cylinder assembly from being pulled out of the outer sleeve 117; and in a specific embodiment, when the flange II 1132 of the inner cylinder assembly abuts against the limiting sleeve 116, the telescopic locking head 110 engages with a locking hole 1171 on the outer sleeve 117, at which time the push handle is at its longest.

[0116] The principle of push handle length adjustment:

[0117] When the push handle length needs to be adjusted, toggle and press the toggle button 102 to move the sliding pin I 105 to the bottom end of the vertical groove of the right angle slide groove 1061. At this time, the mounting base I 104 moves downward relative to the inner sleeve 106, and the push rod 107 moves downward under the push of the mounting base I 104, pushing the push rod base 108 and the mounting base II 109 to move downward. Due to the restriction of the transverse slide groove II 1131 on the mounting cylinder 113, the sliding pin II 111 moves away from the through hole I 1093 along the inclined slide groove 1091, causing the telescopic locking head 110 to retract, releasing the cooperation between the telescopic locking head 110 and the locking hole 1171 of the outer sleeve 117, and realizing the unlocking of the locking component relative to the outer sleeve 117.

[0118] When the push handle length needs to be locked, the button is released, and the telescopic locking head 110 is aligned with a locking hole 1171 on the outer sleeve 117. Under the action of spring II 120, the mounting base II 109 moves upward relative to the mounting cylinder 113. On the one hand, due to the restriction of the transverse sliding groove II 1131 on the mounting cylinder 113, the sliding pin II 111 moves along the inclined sliding groove 1091 close to the through hole I 1093, causing the telescopic locking head 110 to extend. The telescopic locking head 110 engages with the locking hole 1171 on the outer sleeve 117, and the locking assembly is locked relative to the outer sleeve 117. On the other hand, the push rod base 108, push rod 107, mounting base I 104, and sliding pin I 105 all move upward. When the sliding pin I 105 moves to the connection between the horizontal and vertical grooves of the right-angle sliding groove 1061, under the action of spring II 120, the sliding pin I 105 automatically enters the end of the horizontal groove of the right-angle sliding groove 1061.

[0119] Example 3:

[0120] This embodiment is based on embodiment 1 or embodiment 2, see appendix. Figure 11-13 The crank 5 and driven wheel 4 of the multi-functional stroller are both fixedly connected to the crankshaft 20. The crank 5 is pin-connected to the carrier of the multi-functional stroller. The seat is located on the carrier. When the driven wheel 4 rotates, the carrier shakes.

[0121] The seat positioning mechanism 21 includes a housing 17, a spring 2, a sliding sleeve I 3, and a lever 8;

[0122] Sliding sleeve I3 is coaxially sleeved on crankshaft 20 and adjacent to driven wheel 4; spring 2 is coaxially limited on the side of sliding sleeve I3 away from driven wheel 4 and abuts against sliding sleeve I3;

[0123] The housing 17 is provided with a slide groove 12, which is arranged along the axial direction of the crankshaft 20; the slide sleeve I3 is provided with a slider 32, which is located in the slide groove 12.

[0124] The push handle 1 is fixedly connected to the housing 17. The housing 17 is provided with a through hole 15, which is located on one side of the push handle 1. The lever 8 passes through the through hole 15, and the part of the lever 8 inside the housing 17 is hinged to the housing 17. The lever 8 is also provided with a protrusion I 81, and the sliding sleeve I 3 is provided with a groove I 33. The protrusion I 81 and the groove I 33 are connected in a mating manner. The through hole 15 is provided with a locking groove 152.

[0125] When the multi-functional stroller is rocking, the lever 8 is located in the locking groove 152, the spring 2 is under pressure, and the sliding sleeve I3 is disengaged from the driven wheel 4.

[0126] When the seat of the multi-functional stroller is positioned, the lever 8 disengages from the locking groove 152, and the lever 8 can rotate along the hinge point. Under the action of the spring force of the spring 2, the sliding sleeve I3 engages with the driven wheel 4.

[0127] The multifunctional stroller provided in this embodiment has a seat positioning mechanism 21 that can limit and fix the seat in flat walking mode or when the child gets in and out of the stroller, ensuring the stability of the seat.

[0128] Furthermore, a sleeve base is provided at the rear end of the housing 17, and the bottom end of the outer sleeve 117 is engaged with the sleeve base by a spring clip 118 to connect the push handle to the housing 17; the top end of the outer sleeve 117 is bent away from the carrier to prevent interference with the carrier.

[0129] Furthermore, the driven wheel 4 may be provided with one or more upper limit bosses 41, and the sliding sleeve I3 may be provided with one or more upper limit grooves 31; or the driven gear may be provided with one or more upper limit grooves 31, and the sliding sleeve I3 may be provided with one or more upper limit bosses 41; so that the seat can be positioned in several positions during the rocking process.

[0130] In one specific embodiment, see Appendix Figure 13 and 14The driven wheel 4 is provided with a limiting boss 41, and the sliding sleeve I3 is provided with a limiting groove 31; this allows the seat to be positioned only at specific locations during rocking. Furthermore, when the limiting groove 31 and the limiting boss 41 cooperate under the action of the spring 2, the seat is horizontal. This ensures that the seat is positioned in a horizontal position to guarantee the comfort of the child.

[0131] In addition, the seat can be positioned at other angles.

[0132] In addition, a limiting groove 31 can be provided on the driven wheel 4, and a limiting boss 41 can be provided on the sliding sleeve I3.

[0133] The groove I33 can be an annular groove coaxial with the sliding sleeve I3, or it can be a coaxial arc groove, a circular groove extending radially, a square groove, or other polygonal grooves.

[0134] A limiting member 11 is also coaxially fixedly connected to the crankshaft 20. One end of the spring 2 abuts against the limiting member 11, and the other end abuts against the sliding sleeve I3. The limiting member 11 can be connected to the crankshaft 20 by screws, bolts, snap-fit, or rotation.

[0135] See appendix Figure 15 The side of the sliding sleeve I3 that abuts against the spring 2 is provided with a coaxial circular groove I34, and the side of the limiting member 11 that abuts against the spring 2 is provided with a coaxial circular groove II. The circular grooves I34 and II can ensure the reliable contact of the spring 2.

[0136] In addition, the end of the spring 2 that is opposite to the sliding sleeve I3 can directly abut against the inner wall of the housing 17.

[0137] See appendix Figure 16 The through hole 15 includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion Ⅲ151 extending towards the end of the second hole segment is provided at the corner. The protrusion Ⅲ151 and the adjacent sidewall of the second hole segment form the aforementioned locking groove 152.

[0138] Working principle:

[0139] When the multi-functional stroller is stationary or switched to level mode, and the seat needs to be positioned horizontally, first move the lever 8 from the locking groove 152 towards the end of the second hole section (i.e., on the right side of the figure) outside the housing 17. Then, move the lever 8 vertically until it is flush with the first hole section, releasing the locking groove 152 from limiting the lever 8. Continue to push the multi-functional stroller to rotate the driven wheel 4 until it rotates until the limiting boss 41 on the driven wheel 4 is aligned with the limiting groove 31 of the sliding sleeve I3. Under the action of spring 2, the slider 32 of the sliding sleeve I3 moves along the groove 12 on the housing 17 towards the driven wheel 4. While the limiting boss 41 and the limiting groove 31 are engaged, the lever 8 moves automatically to the first hole section of the through hole 15 under the action of the groove I33 of the sliding sleeve I3 on ​​the protrusion I81. Since the groove 12 restricts the rotation of the sliding sleeve I3, the driven wheel 4, which is engaged with the sliding sleeve I3, cannot rotate, thus realizing the positioning of the crank 5.

[0140] When switching the multi-functional stroller to rocking mode, to release the seat's movement restriction, first move the lever 8 towards the end of the second hole section outside the housing 17, then press the lever 8. The lever 8 can rotate around its hinge point with the housing 17, causing the protrusion I81 on the lever 8 to move away from the driven wheel 4. Since the protrusion I81 cooperates with the groove I33 on the sliding sleeve I3, the protrusion I81 drives the sliding sleeve I3 away from the driven wheel 4, causing the driven wheel 4 and the sliding sleeve I3 to disengage. The driven wheel 4 can resume rotation, releasing the restriction on the seat's movement. At the same time, under the elastic force of the spring 2, the lever 8 enters the locking groove 152, locking the lever 8.

[0141] Example 4:

[0142] This embodiment is based on embodiment 3, see appendix. Figure 17 and 18 The end of the lever 8 located inside the housing 17 is designated as the first end, and the end located outside the housing 17 is designated as the second end. This second end is the handle 83.

[0143] A protrusion I 81 is located at the end of the lever 8 located inside the housing 17. The hinge point between the lever 8 and the housing 17 is adjacent to the protrusion I 81 (this "adjacent" means that the center distance between the hinge point and the protrusion is less than the net distance between the hinge point and the side wall of the housing 17 where the through hole 15 is located), and the thickness at the hinge point of the lever 8 is greater than the thickness of the handle 83. Because the hinge point between the lever 8 and the housing 17 is adjacent to the protrusion I 81, the lever arm is longer and less effort is required when the handle 83 is turned.

[0144] Specifically, a pin hole 82 is provided at the position adjacent to the protrusion I 81 on the lever 8, and a fixing seat 13 is provided inside the housing 17. The lever 8 is pinned to the fixing seat 13 through the pin hole 82 by a pin 10; the pin 10 is a metal part.

[0145] See appendix Figure 1 and 11 The lever 8 is a curved lever, which makes room for the installation of the push handle 1.

[0146] Example 5:

[0147] Based on embodiment 3, this embodiment differs from embodiment 4 in that the hinge point between the lever 8 and the housing 17 is located at the end of the lever 8 located inside the housing 17.

[0148] The protrusion I 81 is set on the lever 8 and is adjacent to the hinge point of the lever 8;

[0149] Furthermore, the through hole 15 is horizontally reversed compared to the through hole 15 in Embodiment 2.

[0150] Everything else is the same as in Example 4, and will not be repeated here.

[0151] Example 6:

[0152] Based on Example 4, and referring to the content of patent CN101492066A, the trolley body includes a carrier, front wheels, rear wheels, a chassis and a rocking structure.

[0153] The drive shaft 14 is rotatably mounted on the vehicle chassis, and two rear wheels are located at both ends of the drive shaft 14, one of which serves as the drive wheel 9; the drive wheel 9 is coaxially and fixedly connected to the drive shaft 14.

[0154] The swing structure is located between the front of the load-bearing body and the underframe. The upper end of the swing structure is pinned to the load-bearing body, and the lower end is pinned to the underframe. The swing structure uses a rocker arm.

[0155] See appendix Figure 11 , 12 19-21, The drive shaft 14 is also coaxially equipped with a drive wheel 7 and a sliding sleeve II 16;

[0156] A guide block 18 is fixedly installed on the drive shaft 14, and a guide groove I 161 is provided on the inner circumference of the sliding sleeve II 16. The guide block 18 is located in the guide groove I 161, so that the sliding sleeve II 16 can slide along the drive shaft 14.

[0157] The driving wheel 7 and the driven wheel 4 are driven by the transmission mechanism 6. The driving wheel 7 is rotatably connected to the drive shaft 14. The end of the driving wheel 7 facing the sliding sleeve II 16 is provided with a number of guide bosses 19 distributed along the circumference. The end of the sliding sleeve II 16 facing the driving gear is provided with a number of guide grooves II 162 distributed along the circumference. The length direction of the guide bosses 19 and the guide grooves II 162 are both axial. The guide bosses 19 and the guide grooves II 162 can be matched one-to-one.

[0158] Furthermore, several guide grooves II162 are provided on the inner circumference of the sleeve II16, and guide bosses 19 are provided on the outer circumference of the drive wheel 7 facing the end of the sleeve II16.

[0159] See appendix Figure 18 The lever 8 has a protrusion II 84 in the middle, and the protrusion II 84 is located on the side of the hinge point opposite to the protrusion I 81; the sliding sleeve II 16 has a groove II 163; the protrusion II 84 and the groove II 163 cooperate to realize the actuation of the sliding sleeve II 16.

[0160] When the multi-functional stroller is rocking, the guide groove II162 of the sliding sleeve II16 engages with the guide boss 19;

[0161] When the multi-functional stroller is in a horizontal position, the sliding sleeve II16 moves away from the drive wheel 7, and the guide boss 19 disengages from the guide groove II162.

[0162] The thickness of the protrusion Ⅱ 84 on the lever 8 is greater than the thickness of the handle 83 to ensure the strength of the lever 8.

[0163] Furthermore, the groove II163 can be an annular groove coaxial with the sliding sleeve II16, or it can be a coaxial arc groove, a circular groove extending radially, a square groove, or other polygonal grooves.

[0164] Furthermore, the driving pulley 7 is a driving pulley, the driven pulley 4 is a driven pulley, the transmission mechanism 6 is a belt, and the outer diameter of the driving pulley is smaller than the outer diameter of the driven pulley;

[0165] Alternatively, the driving gear 7 is the driving gear, the driven gear 4 is the driven gear, the transmission mechanism 6 is the idler gear, and the outer diameter of the driving gear is smaller than the outer diameter of the driven gear.

[0166] Alternatively, the driving sprocket 7 can be a driving sprocket, the driven sprocket 4 a driven sprocket, and the transmission mechanism 6 a chain, with the outer diameter of the driving sprocket being smaller than that of the driven sprocket.

[0167] Working principle:

[0168] When the seat needs to be limited in the stationary or horizontal movement mode of the multi-functional stroller, the protrusion II 84 moves the sliding sleeve II 16 along with the movement of the lever 8, causing the sliding sleeve II 16 to move away from the drive wheel 7. The guide groove II 162 of the sliding sleeve II 16 disengages from the guide boss 19 on the drive wheel 7. The guide block 18 rotates with the drive shaft 14, thereby driving the sliding sleeve II 16 to rotate. Since the guide groove II 162 of the sliding sleeve II 16 disengages from the guide boss 19 on the drive wheel 7, the drive wheel 7 is rotatably connected to the drive shaft 14, so the drive wheel 7 does not rotate. Therefore, there is no transmission between the drive wheel 7 and the driven wheel 4.

[0169] In the rocking mode of the multi-functional stroller, when the seat needs to be released from its limit, the protrusion II 84 moves the sliding sleeve II 16 along with the movement of the lever 8, causing the sliding sleeve II 16 to move in the direction of the drive wheel 7. The guide groove II 162 of the sliding sleeve II 16 engages with the guide boss 19 on the drive wheel 7. The guide block 18 rotates with the drive shaft 14, thereby driving the sliding sleeve II 16 to rotate. Since the guide groove II 162 of the sliding sleeve II 16 engages with the guide boss 19 on the drive wheel 7, the drive wheel 7 and the sliding sleeve II 16 rotate synchronously, thereby driving the driven wheel 4 to rotate, causing the crank 5 to rotate, and the carrier to rock.

[0170] Example 7:

[0171] Based on any one of embodiments 3-5, and referring to the content of patent CN101492066A, the trolley body includes a carrier, front wheels, rear wheels, a chassis and a rocking structure;

[0172] The drive shaft 14 is rotatably mounted on the vehicle chassis, and two rear wheels are located at both ends of the drive shaft 14, one of which serves as the drive wheel 9; the drive wheel 9 is coaxially and fixedly connected to the drive shaft 14.

[0173] The swing structure is located between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier, and the lower end is pinned to the vehicle chassis.

[0174] The driving gear 7 is the driving gear, the driven gear 4 is the driven gear; the transmission mechanism 6 is the idler gear;

[0175] The driving gear is fixedly connected to the drive shaft 14. An idler gear carrier is fitted around the driving gear. The idler gear is rotatably mounted on the idler gear carrier. The idler gear carrier is slidably connected to the drive shaft 14, allowing the idler gear carrier to slide along the axial direction of the drive shaft 14. By moving the idler gear carrier, the idler gear carrier and the driven gear of the driving gear mesh simultaneously, thereby generating a transmission between the driving gear and the driven gear. By moving the idler gear carrier, the idler gear and the driven gear of the driving gear disengage simultaneously, cutting off the transmission between the driving gear and the driven gear.

[0176] Alternatively, the drive gear is slidably connected to the drive shaft 14, and the drive gear can move along the axial direction of the drive shaft 14, and the drive gear moves synchronously with the idler gear carrier;

[0177] Furthermore, the idler gear carrier can also rotate along the drive shaft 14; two or more driven gears of different specifications are set on the crank shaft. By synchronously moving the idler gear carrier, the idler gear and the driving gear, and rotating the idler gear carrier and the idler gear, the idler gear carrier can mesh or disengage with different driven gears, thereby realizing the transmission between the driving gear and driven gears of different specifications.

[0178] Alternatively, the idler gear carrier can rotate along the drive shaft 14, and the idler gear meshes with the driving gear. Rotating the idler gear carrier causes the idler gear to mesh or disengage with the driven gear, thereby connecting or disconnecting the transmission between the driving gear and the driven gear.

[0179] Example 8:

[0180] Based on any one of embodiments 3-5, this embodiment also includes a clutch mechanism; the trolley body includes a carrier, front wheels, rear wheels, a chassis, and a rocking structure;

[0181] The drive shaft 14 is rotatably mounted on the chassis, and the two rear wheels are located at both ends of the drive shaft 14, with one of the rear wheels serving as the drive wheel 9;

[0182] The swing structure is located between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier, and the lower end is pinned to the vehicle chassis.

[0183] The clutch mechanism is located on the drive wheel 9. This clutch mechanism controls the drive wheel 9 to rotate synchronously with the drive shaft 14 or to disengage from rotation, thereby controlling the switching between the flat walking mode and the dynamic mode of the multi-functional stroller.

[0184] The clutch mechanism can adopt the clutch structure disclosed in patent CN101492066A.

[0185] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-functional stroller that allows for smooth pushing, characterized in that, Includes the stroller body, push handle, and seat positioning mechanism; The seat positioning mechanism is located at the bottom rear end of the trolley body; The push handle includes an outer sleeve, an inner sleeve, a grip, a telescopic adjustment assembly, and a locking assembly located at the bottom of the inner sleeve; The telescopic adjustment assembly includes a toggle button, mounting base I, sliding pin I, and push rod; Mounting base I is fitted inside the inner sleeve; the toggle button is located on the top of the handle, and the bottom of the toggle button extends into mounting base I; the toggle button can move longitudinally. The mounting base I is provided with a horizontal sliding groove I, and the inner sleeve is provided with a right-angle sliding groove; the right-angle sliding groove includes a horizontal groove and a vertical groove, with the end of the vertical groove facing the bottom of the inner sleeve; The sliding pin I is provided with a toggle button, a horizontal slide groove I, and a right-angle slide groove along its horizontal direction; One end of the push rod abuts against the bottom of mounting base I, and the other end abuts against the locking assembly, realizing the transmission between the toggle button and the locking assembly; a spring I is provided inside the locking assembly, which can push the push rod upward; When the toggle button is moved horizontally and pressed vertically, causing the sliding pin I to be located at the bottom of the vertical groove of the right-angle slide, the locking component is unlocked from the outer sleeve, and the inner sleeve component can slide relative to the outer sleeve. When the horizontal toggle button is moved so that the sliding pin I is at the end of the horizontal groove of the right-angle slide, the locking assembly locks with the outer sleeve.

2. The multi-functional stroller that allows for smooth pushing as described in claim 1, characterized in that, The telescopic adjustment assembly also includes a guide rod and spring II; The guide rod is set laterally within the mounting base I and can move longitudinally; the guide rod is perpendicular to the sliding pin I; the guide rod is also fitted with a toggle button, which can move along the length of the guide rod. Spring II is sleeved on the outer periphery of the guide rod and located on the side of the vertical groove of the right-angle slide; one end of spring II abuts against the inner wall of mounting seat I, and the other end abuts against the toggle button.

3. A multi-functional stroller that allows for smooth pushing, as described in claim 1 or 2, characterized in that, The locking assembly also includes mounting base II, telescopic locking head, sliding pin II, mounting sleeve and fixing pin; The bottom end of the mounting cylinder is fixed to the inner sleeve, and the two opposite sides of the mounting base II are provided with inclined sliding grooves; the mounting base II is installed inside the mounting cylinder, and the two opposite sides of the mounting cylinder are provided with transverse sliding grooves II; the telescopic clamp is set inside the mounting base II, and the sliding pin II passes through the transverse sliding groove II, the inclined sliding grooves and the telescopic clamp; Mounting base II is provided with a through hole I for telescopic head extension and retraction. The height of the inclined slide groove facing through hole I is lower than that of the other end. Mounting cylinder is provided with a through hole II for telescopic head extension and retraction. The bottom of the mounting cylinder is closed. Spring I is set inside the mounting cylinder, with one end abutting against the inner bottom surface of the mounting cylinder and the other end abutting against the bottom surface of the mounting base II; the bottom end of the push rod abuts against the mounting base II. The outer sleeve has several locking holes distributed along its length, and the telescopic locking head can be engaged with these locking holes.

4. The multi-functional stroller that allows for smooth pushing as described in claim 3, characterized in that, The bottom of the mounting cylinder is provided with flange II, and the top of the mounting cylinder extends into the inner sleeve. The outer diameter of flange II is larger than the outer diameter of the inner sleeve. The top of the outer tube is fixedly connected to a limiting sleeve, which can pull the flange II of the inner cylinder assembly to abut against the limiting sleeve.

5. The multi-functional stroller that allows for smooth pushing as described in claim 3, characterized in that, The seat positioning mechanism includes a housing, a spring, a sliding sleeve I, and a lever; The trolley body includes a drive wheel, a carrier, a base frame, a rocking structure, a crank, and a crankshaft; The swing structure is set between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier and the lower end is pinned to the vehicle chassis. The drive shaft is rotatably mounted on the chassis, and the drive wheel is coaxially and fixedly connected to the drive shaft. A drive wheel is also coaxially mounted on the drive shaft, and the crank and driven wheel are both fixedly connected to the crankshaft. The drive wheel and driven wheel are driven by a transmission mechanism. The crank is pin-connected to the carrier of the multi-functional stroller, and the seat is located on the carrier. Sleeve I is coaxially sleeved on the crankshaft and adjacent to the driven wheel; spring is coaxially positioned on the side of sleeve I away from the driven wheel and abuts against sleeve I; The housing is provided with a sliding groove, which is arranged axially along the crankshaft; the sliding sleeve I is provided with a slider, which is located inside the sliding groove; The housing has a through hole, through which the lever passes. The part of the lever inside the housing is hinged to the housing. The lever also has a protrusion I and a groove I on the sliding sleeve I. The protrusion I and the groove I are connected in a mating manner. The through hole has a locking groove. When the multi-functional stroller is rocking, the lever is in the locking groove, the spring is compressed, and the sliding sleeve I is disengaged from the driven wheel. When the seat of the multi-functional stroller is in position, the lever disengages from the locking groove, and the lever can rotate along the hinge point. Under the action of the spring force, the sliding sleeve I engages with the driven wheel.

6. The multi-functional stroller that allows for smooth pushing as described in claim 5, characterized in that, The driven wheel is provided with a limiting boss, and the sliding sleeve I is provided with a limiting groove. When the limiting groove and the limiting boss are engaged, the seat is level.

7. The multi-functional stroller with smooth pushing as described in claim 5, characterized in that, A sliding sleeve II is also coaxially mounted on the drive shaft; A guide block is fixedly installed on the drive shaft, and a guide groove I is provided on the inner circumference of the sliding sleeve II. The guide block is located in the guide groove I, so that the sliding sleeve II can slide along the drive shaft. The drive wheel is rotatably connected to the drive shaft. The end of the drive wheel facing the sliding sleeve II is provided with several guide bosses distributed along the circumference. The end of the sliding sleeve II facing the drive gear is provided with several guide grooves II distributed along the circumference. The guide bosses and guide grooves II are both axial in length direction, and the guide bosses and guide grooves II can be matched one-to-one. The lever has a protrusion II in the middle, and protrusion II is located on the side of the hinge point opposite to protrusion I; the sliding sleeve II has a groove II; protrusion II and groove II cooperate. When the multi-functional stroller is rocking, the guide groove II of the slide sleeve II engages with the guide boss; When the multi-functional stroller is in a horizontal position, the sliding sleeve II moves away from the drive wheel, and the guide boss disengages from the guide groove II.

8. The multi-functional stroller that allows for smooth pushing as described in claim 5, characterized in that, The through hole includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion III extending towards the end of the second hole segment is provided at the corner. The protrusion III and the sidewall of the adjacent second hole segment form the aforementioned locking groove.

9. A multi-functional stroller that is stable to push as described in claim 7, characterized in that, The push handle is fixedly connected to the middle of the rear end of the housing, the through hole is located on one side of the push handle, and the lever is a curved lever.

10. A multi-functional stroller that is stable to push as described in claim 5, characterized in that, The thickness at the hinge point of the lever is greater than the thickness of the handle.

Images