Multifunctional baby carriage

Abstract

The utility model provides a multifunctional baby carriage, which is applied to the technical field of baby carriages and is characterized by comprising a carriage frame, a baby cabin fixedly arranged on the carriage frame and shoulder straps fixed on the carriage frame, a front combined wheel is rotationally arranged in the middle of the front end of the frame; the front combined wheel comprises a rotating shaft which is rotationally arranged on the frame; the two mounting plates are fixedly connected to the rotating shaft respectively; front wheel frames are arranged on the two mounting plates; at least three front wheels are rotationally connected to the front wheel frame, a rear leg frame is hinged to the rear end of the frame, and at least two rear wheels are rotationally arranged on the rear leg frame; a first gear and a second gear are arranged on the frame; the electric vehicle has the technical effects that the electric vehicle can run on bumpy road surfaces; the road barrier can also be used for a narrow channel, namely the road barrier can be passed; therefore, the multi-functional electric wheelchair has the characteristic of multi-functional use.

Description

Technical Field

[0001] The utility model relates to the technical field of baby carriages, in particular to a multifunctional baby carriage. Background Art

[0002] A baby carriage is a tool vehicle designed to facilitate outdoor activities for babies. It is the most beloved means of transportation for babies to take walks and is also a necessity for mothers when taking their babies shopping on the street. Generally speaking, baby carriages in the Asian market are divided into two major categories: Type A and Type B. Type A carriages are used when the baby is over 2 months old and can hold up their head. The baby mainly lies inside the baby carriage. Type B carriages are used after the baby is over 7 months old and can sit steadily. The baby can mainly sit or lie inside. Currently, during the use of existing baby carriages, there are relatively high requirements for the flatness of the road surface. When the baby carriage encounters small obstacles or narrow passages (narrow passages between two isolation piers) during driving, due to the very flexible rotation of the universal wheels and being difficult to control, the universal wheels will get stuck in the gap or rotate into a position perpendicular to the direction of movement. At this time, there is a risk of the vehicle body tipping forward. And in a corridor without an elevator, the baby carriage cannot be smoothly pushed upstairs and needs to be carried upstairs, which is very inconvenient to use.

[0003] Currently, the Chinese utility model with the publication number CN207631319U discloses a baby stroller that can climb stairs, including a sunshade, a front wheel connecting rod, and a transmission shaft. Inside the sunshade, there is a sunshade support. At the bottom end of the sunshade support, there is a sunshade rotating shaft. Above the right side of the sunshade rotating shaft, there is a push rod. In the middle position on the outer surface of the push rod, there is a control button, and below the left end of the push rod, there is a push rod rotating shaft. On the right side of the push rod rotating shaft, there is a sitting posture adjusting rod. The front wheels of the baby are set as three small wheels arranged in an equilateral triangle.

[0004] Although existing baby carriages can be used to climb stairs, for relatively high obstacles such as sections with isolation piers or narrow roads, the baby carriage cannot pass well and still needs to be carried over, which is very difficult for people with relatively small strength. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a multifunctional baby carriage, which has the advantages that it can not only be used to climb stairs but also be used for relatively narrow passages, with the characteristics of multifunctional use.

[0006] To achieve the above purpose and other related purposes, the utility model provides the following technical solutions:

[0007] A multifunctional baby carriage includes a vehicle frame, a baby cabin arranged on the vehicle frame, and a shoulder strap fixed on the vehicle frame.

[0008] A front combined wheel is rotatably provided in the middle of the front end of the frame; the front combined wheel includes

[0009] a rotating shaft that rotates on the frame;

[0010] mounting plates, and two of the mounting plates are respectively fixedly connected to the rotating shaft; front wheel frames are provided on both of the mounting plates;

[0011] front wheels, and at least three front wheels are rotatably connected to the front wheel frames;

[0012] A rear leg frame is hinged to the rear end of the frame, and at least two rear wheels are rotatably provided on the rear leg frame; a first gear position and a second gear position are provided on the frame. When the rear leg frame is fixed in the first gear position, both the rear wheels and the front combined wheel are in a grounded state; when the rear leg frame is fixed in the second gear position, the rear wheels leave the ground.

[0013] In an embodiment of the present invention, the front wheel frame includes a central wheel, a hinged rod, a slider, and a mounting cover plate;

[0014] The central wheel is rotatably connected to the rotating shaft, and at least three hinged rods are hinged to the central wheel;

[0015] The hinged rod is hinged to the slider, the slider is slidably connected to the mounting cover plate, and the front wheel is rotatably connected to the slider;

[0016] A fixing member for restricting the sliding of the slider is provided between the slider and the mounting cover plate.

[0017] In an embodiment of the present invention, a first receiving groove for receiving the slider is provided on one side of the hinged rod;

[0018] A second receiving groove for receiving the hinged rod is provided on the mounting plate close to the central wheel side.

[0019] In an embodiment of the present invention, a limiting hole is provided in the middle of the mounting cover plate.

[0020] In an embodiment of the present invention, the frame and the rear leg frame are fixed in the first gear position or the second gear position by a fixing pin.

[0021] In an embodiment of the present invention, the rear leg frame includes two rear leg brackets hinged to the frame and inclined towards both sides of the baby cabin respectively, and a connecting rod with two ends respectively fixed on the two rear leg brackets, and the rear wheels are rotatably connected to the bottom of the rear leg brackets.

[0022] In an embodiment of the present utility model, the rear wheel includes a first shaft sleeve fixed to the bottom of the hind leg bracket, an L-shaped rotating shaft rotatably connected within the first shaft sleeve, a second shaft sleeve rotatably connected to the other end of the L-shaped rotating shaft, at least three third shaft sleeves fixed on the circumference of the second shaft sleeve, a fourth support rod rotatably connected to the third shaft sleeve, and a rear wheel rotatably connected to the fourth support rod;

[0023] A pin is slidably connected to the first shaft sleeve, and a plug plate is fixedly arranged on the L-shaped rotating shaft directly below the pin. A jack for insertion and cooperation with the pin is provided on the plug plate.

[0024] In an embodiment of the present utility model, the baby cabin includes a cabin body and a cabin cover covering the cabin body; the baby cabin includes a cabin body, a baby seat adjustably arranged within the cabin body, and a cabin cover hinged to the cabin body; ventilation holes are provided on the side wall of the cabin body;

[0025] The cabin cover includes a cover body and an observation cover arranged on the cover body; an extension hole is provided between the cover body and the cabin body; the observation cover covers the extension hole.

[0026] In an embodiment of the present utility model, a baby compartment and an installation compartment are arranged within the cabin body; a fixing frame is fixedly arranged within the baby compartment, and first slide rails are fixed on both sides of the fixing frame, and second slide rails arranged at a certain angle to the first slide rails; first rollers rolling within the first slide rails and second rollers rolling within the second slide rails are arranged on both sides of the baby seat;

[0027] First locking positions and second locking positions are arranged on both of the first slide rails on both sides;

[0028] When the baby seat is fixed at the first locking position, the baby seat extends out from the extension hole, and the baby sits on the baby seat in a sitting posture;

[0029] When the baby seat is fixed at the second locking position, the baby seat is located within the baby compartment, and the baby lies on the baby seat in a lying posture.

[0030] In an embodiment of the present utility model, an air-conditioning system is arranged within the cabin body; a battery for supplying power to the air-conditioning system is arranged within the installation compartment;

[0031] A display screen is arranged on the cover body;

[0032] A lighting lamp is arranged at the front end of the baby cabin.

[0033] As described above, a multifunctional baby stroller of the present utility model has the following beneficial effects:

[0034] 1. Due to the structural characteristics, the two front wheel frames on both sides of the mounting plate can rotate out of sync. During normal operation, there are two front wheels on each side of the mounting plate that touch the ground in a straight line, one in front of the other; at least three or more front wheels rotate independently, enabling the front combined wheel to move horizontally forward; during driving, when a front wheel touching the ground on one side encounters an obstacle, under the action of resistance, the front wheel on this side stops moving forward, and the central wheel on the same side rotates to drive the front wheel frame on the same side to roll forward; as the front wheel frame rolls, the original front wheel in contact with the ground rotates to the rear, and the newly added front wheel rotates to the front, always keeping two front wheels in contact with the ground and continuing to move forward; at this time, since the front wheels on the other side do not encounter obstacles, they move forward normally; therefore, the multifunctional baby stroller can be used on uneven ground or when climbing stairs, and it is very convenient to use.

[0035] 2. Instead of using two wheels at both the front and rear of the traditional baby stroller to maintain balance; the front combined wheel integrates multiple wheels, with a compact structure; the rear leg frame can be adjusted in two gears; when the rear leg frame is fixed in the first gear, the rear wheel and the front combined wheel touch the ground together for normal operation; when the road surface is narrow or passing through isolation piers, the rear leg frame can be fixed in the second gear, and the rear leg frame is lifted off the ground, only allowing the front combined wheel to touch the ground, facilitating the front combined wheel to pass through a narrow passage.

[0036] 3. The cooperation of structures such as the central wheel, mounting cover plate, hinge rod, and slider can enable the front combined wheel to deform, thereby further reducing the width of the front combined wheel and increasing the diameter of the front combined wheel at the same time, raising the height of the baby cabin, and further enabling the baby stroller to pass through a narrower passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is the overall structural schematic diagram of the rear leg frame of Embodiment 1 of the present utility model fixed in the first gear;

[0038] Figure 2 is the overall structural schematic diagram of the rear leg frame of Embodiment 1 of the present utility model fixed in the second gear;

[0039] Figure 3 is the structural schematic diagram of the front combined wheel of Embodiment 1 of the present utility model in the unfolded state;

[0040] Figure 4 is the structural schematic diagram of the front combined wheel of Embodiment 1 of the present utility model in the retracted state;

[0041] Figure 5 is the structural schematic diagram of the baby cabin of Embodiment 1 of the present utility model;

[0042] Figure 6 is the structural schematic diagram of the fixing frame of Embodiment 1 of the present utility model;

[0043] Figure 7 It is a schematic structural view of the first locking position in Embodiment 1 of the present utility model;

[0044] Figure 8 It is a schematic structural view of the second locking position in Embodiment 1 of the present utility model;

[0045] Figure 9 It is a front view of the front combined wheels being retracted in Embodiment 2 of the present utility model;

[0046] Figure 10 It is a schematic view of the overall structure of the rear leg frame fixed in the first gear position in Embodiment 3 of the present utility model;

[0047] Figure 11 It is a schematic view of the front view of the rear wheel in Embodiment 3 of the present utility model;

[0048] Figure 12 It is a schematic view of the rear view of the rear wheel in Embodiment 3 of the present utility model.

[0049] Reference numerals: 1, vehicle frame; 2, baby cabin; 3, armrest; 4, shoulder strap; 5, front combined wheels; 51, rotating shaft; 52, mounting plate; 53, front wheel frame; 54, front wheel; 10, rear leg frame; 11, rear wheel; 531, center wheel; 532, hinged rod; 533, mounting cover plate; 534, slider; 17, fixing member; 171, fixing bolt; 172, fixing nut; 20, first storage groove; 21, second storage groove; 22, limiting hole; 23, fixing pin; 101, rear leg support; 102, connecting rod; 26, rotating shaft; 27, support rod; 28, rear wheel; 201, cabin body; 202, cabin cover; 203, baby seat; 2021, cover body; 2022, observation cover; 31, ventilation hole; 32, baby warehouse; 33, sliding groove; 34, sliding shaft; 35, hinged groove; 36, support frame; 37, first fixing hole; 38, second fixing hole; 39, extending hole; 40, fixing frame; 41, first section of slide rail; 42, second section of slide rail; 43, first locking position; 44, second locking position; 45, display screen; 46, first slide bar; 47, second slide bar; 48, slide hole; 49, first clamping block; 60, first clamping groove; 61, first arc-shaped hole; 62, second clamping block; 63, deformation groove; 64, second arc-shaped hole; 65, first shaft sleeve; 66, L-shaped rotating shaft; 67, second shaft sleeve; 68, third shaft sleeve; 69, fourth support rod; 70, plug pin; 71, push plate; 72, insertion plate; 73, insertion hole. Detailed implementation manners

[0050] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0051] Please refer to Figures 1 to 12 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present utility model can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope in which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.

[0052] Embodiment 1

[0053] Please refer to Figures 1 to 8 , the present utility model provides a multifunctional baby stroller, including a frame 1, a baby cabin 2 arranged on the frame 1, a shoulder strap 4 fixed on the frame 1, and a handrail 3; the handrail 3 facilitates the user to push and pull the baby stroller; the shoulder strap 4 can be hung on the user's body to closely connect the baby stroller with the human body, further playing a protective role;

[0054] In this embodiment, the baby cabin 2 can be fixed on the frame 1 or can be arranged on the frame 1 in an angle-adjustable manner; wherein the baby cabin 2 is rotatably arranged on the frame 1 and the baby cabin 2 with the adjusted angle is fixed to the frame 1 through a locking device;

[0055] A lighting lamp can be arranged at the front end of the baby cabin 2; the baby cabin 2 includes a cabin body 201, a baby seat 203 adjustably arranged in the cabin body 201, and a cabin cover 202 hinged on the cabin body 201; ventilation holes 31 are opened on the side wall of the cabin body 201;

[0056] The cabin cover 202 includes a cover body 2021 and an observation cover 2022 fixedly connected to the cover body 2021; an extension hole 39 is arranged between the cover body 2021 and the cabin body 201; a display screen 45 is arranged on the side of the cover body 2021 close to the extension hole 39, and an audio screen player, etc. is electrically connected to the display screen; the observation cover 2022 covers the extension hole 39. In this embodiment, the observation cover 2022 is made of transparent acrylic board material, which is convenient for observing the baby in the baby stroller;

[0057] Inside the cabin body 201, there is a baby compartment 32 and an installation compartment; a fixing frame 40 is bolted inside the baby compartment 32, and on both sides of the fixing frame 40, a first slide rail 41 and a second slide rail 42 arranged at a certain angle with the first slide rail 41 are bolted; in this embodiment, the included angle between the first slide rail 41 and the second slide rail 42 is an obtuse angle; two first slide rods 46 and a second slide rod 47 are bolted on the baby seat 203, and at positions near both ends of the first slide rod 46, first rollers (not marked in the figure) that roll inside the first slide rail are rotatably connected; at both ends of the second slide rod 47, second rollers (not marked in the figure) that roll inside the second slide rail are rotatably connected;

[0058] On both sides of the first slide rail, a first locking position 43 and a second locking position 44 are arranged;

[0059] When the baby seat 203 is fixed at the first locking position 43, the baby seat 203 extends out from the protruding hole 39, the baby sits on the baby seat 203, and the upper body of the baby extends out from the protruding hole 39 to watch the display screen 45.

[0060] When the baby seat 203 is fixed at the second locking position 44, the baby seat 203 is located inside the baby compartment 32, and the baby lies on the baby seat 203, which is convenient for the baby to lie down and sleep.

[0061] Both ends of the first slide rod 46 pass through the first slide rails 41 on both sides, and slide holes 48 for the first slide rod 46 to slide are opened on the first slide rails 41 on both sides; a first clamping block 49 is fixedly arranged at the first locking position 43, the first clamping block 49 is bolted to the fixing frame 40 on one side of the first slide rail 41, and the first clamping block 49 is arranged near the protruding hole 39; a first clamping groove 60 is arranged on the first clamping block 49, and one end of the first slide rod 46 is clamped in the first clamping groove 60, thereby fixing the baby seat 203 at the first locking position 43; a first arc-shaped hole 61 is opened on the slide hole 48 on the opposite side of the first clamping block 49, and the first arc-shaped hole 61 is used to increase the width of the slide hole 48, so as to facilitate manually pulling out the first slide rod 46 from the first clamping groove 60;

[0062] A second clamping block 62 is fixedly arranged at the second locking position 44, the second clamping block 62 is bolted to the fixing frame 40 on one side of the first slide rail 41, and the second clamping block 62 is arranged on the side away from the protruding hole 39; a deformation groove 63 is arranged on the second clamping block 62, and one end of the first slide rod 46 is clamped between the second clamping block 62 and the side wall of the slide hole 48, thereby fixing the baby seat 203 at the second locking position 44, and a second arc-shaped hole 64 is opened on the slide hole 48 on the opposite side of the second clamping block 62, and the second arc-shaped hole 64 is used to increase the width of the slide hole 48, so as to facilitate manually pulling out the first slide rod 46 from between the second clamping block 62 and the side wall of the slide hole 48.

[0063] An air-conditioning system is provided inside the cabin body 201 to improve the comfort of the baby in the stroller; an installation bin (not marked in the figure) is located below the baby bin; a battery for powering the air-conditioning system is provided inside the installation bin; the battery in this embodiment can also be a storage battery, and a solar panel can also be installed on the cabin body 201 to charge the storage battery.

[0064] A front combined wheel 5 is rotatably provided in the middle of the front end of the frame 1; a rear leg frame 10 is hinged to the rear end of the frame 1, and at least two rear wheels 11 are rotatably provided on the rear leg frame 10; a first gear position and a second gear position are provided on the frame 1. When the rear leg frame 10 is fixed in the first gear position, both the rear wheels 11 and the front combined wheel 5 are in a grounded state; when the rear leg frame 10 is fixed in the second gear position, the rear wheels 11 leave the ground; a fixing pin 23 is used to fix the rear leg frame 10 in the first gear position or the second gear position between the frame 1 and the rear leg frame 10;

[0065] The rear leg frame 10 includes two rear leg brackets 101 hinged to the frame 1 and inclined towards both sides of the baby cabin 2 respectively, and a connecting rod 102 with both ends fixed to the two rear leg brackets 101 respectively. The rear wheels 11 are rotatably connected to the bottom of the rear leg brackets 101;

[0066] First fixing holes 37 are provided on both sides of the frame 1, and second fixing holes 38 are provided above the first fixing holes 37. First matching holes that cooperate with the first fixing holes 37 or the second fixing holes 38 are provided on both of the two rear leg brackets 101. Rotate the rear leg frame 10 to make the first fixing holes 37 opposite to the first matching holes, and fix the rear leg frame 10 on the frame 1 in the first gear position by inserting the fixing pin 23 into the first fixing holes 37 and the first matching holes; thus, the rear wheels 11 and the front combined wheel 5 are on the ground together for normal operation. When the gear needs to be adjusted, remove the fixing pin 23, rotate the rear leg frame 10 to make the second fixing holes 38 opposite to the first matching holes, and insert the fixing pin 23 into the second fixing holes 38 and the first matching holes again to fix the rear leg frame 10 on the frame 1 in the second gear position; thus, the rear leg frame 10 is lifted off the ground, and only the front combined wheel 5 touches the ground, which is convenient for the front combined wheel 5 to pass through a narrow passage.

[0067] The front combined wheel 5 includes a rotating shaft 51, a mounting plate 52, a front wheel frame 53, and a front wheel 54; a support frame 36 is bolted to the front end of the frame 1. One end of the rotating shaft 51 is rotatably connected to the bottom of the support frame 36. Two mounting plates 52 are respectively welded or bolted to the rotating shaft 51. A front wheel frame 53 is provided on one side of each mounting plate 52, and at least three front wheels 54 are rotatably connected to the front wheel frame 53;

[0068] The front wheel frame 53 includes a center wheel 531, a hinge rod 532, a slider 534, and a mounting cover plate 533;

[0069] Among them, the central wheel 531 is a circular plate. The central wheel 531 is coaxially arranged with the mounting plate 52 and is rotatably connected to the rotating shaft 51. In this embodiment, the central wheel 531 and the rotating shaft 51 are connected by a bearing; at least three hinge slots 35 are equiangularly formed on the central wheel 531, and the hinge rods 532 correspond to the hinge slots 35 one by one and are hinged in the hinge slots 35;

[0070] Each hinge rod 532 is hinged to a slider 534. The slider 534 is slidably connected to the mounting cover plate 533; a sliding groove 33 is formed on the mounting cover plate 533, and a sliding shaft 34 is arranged on the slider 534. The sliding shaft 34 slides in the sliding groove 33, and the front wheel 54 is rotatably connected to the sliding shaft 34;

[0071] A fixing member 17 for restricting the sliding of the slider 534 is arranged between the slider 534 and the mounting cover plate 533. The fixing member 17 includes a fixing bolt 171 fixed on the slider 534 and a fixing nut 172 threadedly connected to the fixing bolt 171. The cooperation of the fixing bolt 171 and the fixing nut 172 can fixedly connect the slider 534 and the central wheel 531 together, thereby restricting the sliding of the slider 534; removing the fixing nut 172 can make the slider 534 slide on the mounting cover plate 533, thereby realizing the deformation of the front combined wheel 5 to expand and fold;

[0072] A limiting hole 22 is formed in the middle of the mounting cover plate 533. When the front combined wheel 5 is folded, the rotating shaft 51 is inserted into the limiting hole 22 to further improve the stability of the front combined wheel 5 after folding;

[0073] A first storage groove 20 for storing the slider 534 is formed on one side of the hinge rod 532, and a plurality of second storage grooves 21 for storing the hinge rods 532 are equiangularly arranged on the mounting plate 52 close to the central wheel 531; the number of the plurality of second storage grooves 21 can be the same as the number of the hinge slots 35 or twice the number of the hinge slots 35;

[0074] In this embodiment, when the front wheel frame 53 is folded, when the hinge rods 532 on both sides of the mounting plate 52 are located in the second storage grooves 21, the hinge rods 532 on both sides are arranged opposite to each other one by one.

[0075] Embodiment 2

[0076] Please refer to Figure 9 , in this embodiment, when the front wheel frame 53 is folded, when the hinge rods 532 on both sides of the mounting plate 52 are located in the second storage grooves 21, the hinge rods 532 on both sides are arranged staggeredly.

[0077] Embodiment 3

[0078] Please refer to Figure 10 、 11As shown in FIGS. 11 and 12, in this embodiment, the rear wheel 11 includes a first bushing 65 fixed to the bottom of the rear leg bracket 101, an L-shaped rotating shaft 66 rotatably connected within the first bushing 65, a second bushing 67 rotatably connected to the other end of the L-shaped rotating shaft 66, at least three third bushings 68 fixed to the circumference of the second bushing 67, a fourth strut 69 rotatably connected to the third bushing 68, and a rear wheel 28 rotatably connected to the fourth strut 69;

[0079] Bearings connected to both ends of the L-shaped rotating shaft 66 are provided within both the first bushing 65 and the second bushing 67; a limit bearing and a return spring connected to the fourth strut 69 are provided within the third bushing 68. The limit bearing is used to limit the rotation angle of the fourth strut 69, so that when an external force acts on the two rear wheels 28 in contact with the ground, they rotate by a certain angle, thus facilitating the turning of the stroller; after the stroller finishes turning, since the two rear wheels 28 are not under the action of an external force, due to the characteristics of the limit bearing, the two wheels return to the straight-line motion state.

[0080] For example, when the stroller turns right, the thrust direction of the stroller points to the right front, the direction of the ground friction force on the rear wheel 28 is to the left, and the two rear wheels 28 in contact with the ground drive the fourth strut 69 to rotate in different directions. Under the action of the thrust, the front rear wheel 28 rotates to the right front, and the rear rear wheel 28 rotates to the left front, thereby causing the L-shaped rotating shaft 66 to rotate within the first bushing 65; after the thrust disappears, under the combined action of the limit bearing and the return spring, the two rear wheels 28 return to the straight-line motion state. At this time, the rear wheel 11 changes direction and moves to the right front, achieving the purpose of turning right.

[0081] A plug pin 70 is slidably connected to the first bushing 65. A push plate 71 is integrally formed on the plug pin 70. A plug plate 72 is fixedly provided on the L-shaped rotating shaft 66 directly below the plug pin 70. A jack 73 for plugging and cooperating with the plug pin 70 is provided on the plug plate 72;

[0082] When using the rear wheel 11 to climb stairs, push the push plate 71 downward to insert the plug pin 70 into the jack 73, thereby relatively fixing the first bushing 65 and the L-shaped rotating shaft 66 together; furthermore, when the rear wheel 11 climbs stairs, the rear wheel 28 touches the stairs, and under the action of the resistance, the fourth strut 69 rotates around the second bushing 67, thereby driving the rear wheel 28 to rotate and climb the stairs;

[0083] When the rear wheel 11 finishes climbing the stairs, push the push plate 71 upward to disengage the plug pin 70 from the jack 73, and then rotate the plug pin 70 so that the push plate 71 is placed on the first bushing 65. The rear wheel is used as a universal wheel, which facilitates the turning of the stroller during use;

[0084] Brief description of the usage process:

[0085] When the rear leg frame 10 is fixed in the first gear position, the rear wheel 11 and the front combined wheel 5 touch the ground together. Among them, the two front wheels 54 on both sides of the mounting plate 52 touch the ground one after another in a straight line. The front wheels 54 rotate independently, enabling the front combined wheel 5 to move horizontally forward for normal operation and use. During driving, when one of the front wheels 54 touching the ground encounters an obstacle, under the action of the resistance, the front wheel 54 stops moving forward, and the center wheel 531 on one side rotates to drive the front wheel frame 53 on the same side to roll forward. As the front wheel frame 53 rolls, the original front wheel 54 in contact with the ground rotates to the rear, and the newly added front wheel 54 rotates to the front, always keeping two front wheels 54 in contact with the ground and continuing to move forward. At this time, since the front wheel 54 on the other side does not encounter an obstacle, it moves forward normally.

[0086] When the road surface is narrow or when passing through a separation pier, the back strap is set on the user's body as the support of the rear wheel 11. The rear leg frame 10 can be adjusted and fixed in the second gear position. The rear leg frame 10 is lifted off the ground, and only the front combined wheel 5 touches the ground, turning the baby carriage into a unicycle stroller. Pushing the baby carriage facilitates the front combined wheel 5 to pass through a narrow passage.

[0087] When encountering a narrower passage, first folding up the front wheel frame 53 can deform the front combined wheel 5: At this time, the hinge rod 532 is located in the second storage groove 21 on the mounting plate 52. Under the combined action of the mounting cover plate 533 and the mounting plate 52, the front wheel frame 53 is fixed on the rotating shaft 51, losing the ability of the center wheel 531 to rotate on the rotating shaft 51. Through the connection of the rotating shaft 51, the two front wheel frames on both sides rotate synchronously and jointly rotate on the bracket 36; thereby further reducing the width of the front combined wheel 5 and at the same time increasing the diameter of the front combined wheel 5; raising the height of the baby compartment 32 to facilitate the baby carriage to pass through a narrower separation pier gap.

[0088] After the baby carriage passes through a narrow passage, adjust the rear leg frame 10 to the first gear position for normal use.

[0089] In summary, the structures such as the cooperation of the center wheel 531, the mounting cover plate 533, the hinge rod 532, and the slider 534 of the present utility model can deform the front combined wheel 5, thereby further reducing the width of the front combined wheel 5 and raising the height of the baby compartment 32, and further enabling the baby carriage to pass through a narrower passage. Therefore, the present utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0090] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A multifunctional baby stroller, characterized in that: It comprises a frame (1), a baby cabin (2) arranged on the frame (1), and a shoulder strap (4) fixed on the frame (1); A front combined wheel (5) is rotatably arranged in the middle of the front end of the frame (1); the front combined wheel (5) comprises A rotating shaft (51), wherein the rotating shaft (51) rotates on the vehicle frame (1); A mounting plate (52), wherein the two mounting plates (52) are respectively fixedly connected to the rotating shaft (51); and the two mounting plates (52) are both provided with a front wheel frame (53); Front wheels (54), at least three front wheels (54) are rotatably connected to the front wheel frame (53); The rear end of the frame (1) is hingedly connected to a rear leg frame (10), and at least two rear wheels (11) are rotatably arranged on the rear leg frame (10); the frame (1) is provided with a first gear position and a second gear position, and when the rear leg frame (10) is fixed in the first gear position, the rear wheels (11) and the front combined wheels (5) are both in a ground contact state; when the rear leg frame (10) is fixed in the second gear position, the rear wheels (11) leave the ground.

2. A multifunctional baby stroller according to claim 1, characterized in that: The front wheel frame (53) comprises a central wheel (531), a hinge rod (532), a slider (534) and a mounting cover plate (533); The central wheel (531) is rotatably connected to the rotating shaft (51), and at least three hinged rods (532) are hinged on the central wheel (531); The hinge rod (532) is hinged to the slider (534), the slider (534) is slidably connected to the mounting cover plate (533), and the front wheel (54) is rotatably connected to the slider (534); A fixing member (17) for limiting the sliding movement of the slider (534) is provided between the slider (534) and the mounting cover plate (533).

3. A multifunctional baby stroller according to claim 2, characterized in that: A first receiving groove (20) for receiving a sliding block (534) is provided on one side of the hinge rod (532); A second receiving groove (21) for receiving the hinge rod (532) is provided on the mounting plate (52) on one side close to the central wheel (531).

4. A multifunctional baby stroller according to claim 3, characterized in that: A limiting hole (22) is provided in the middle of the installation cover plate (533).

5. The multifunctional baby stroller according to claim 1, characterized in that: The rear leg frame (10) is fixed at a first gear position or a second gear position via a fixing pin (23) between the vehicle frame (1) and the rear leg frame (10).

6. The multifunctional baby stroller according to claim 1, characterized in that: The rear leg frame (10) comprises two rear leg brackets (101) hinged on the frame (1) and inclined toward two sides of the baby cabin (2) respectively, and a connecting rod (102) with two ends respectively fixed to the two rear leg brackets (101); the rear wheel (11) is rotatably connected to the bottom of the rear leg bracket (101).

7. A multifunctional baby stroller according to claim 6, characterized in that: The rear wheel (11) comprises a first shaft sleeve (65) fixed at the bottom of the rear leg support (101), an L-shaped shaft (66) rotatably connected to the first shaft sleeve (65), a second shaft sleeve (67) rotatably connected to the other end of the L-shaped shaft (66), at least three third shaft sleeves (68) fixed on the circumference of the second shaft sleeve (67), a fourth support rod (69) rotatably connected to the third shaft sleeve (68), and a rear wheel (28) rotatably connected to the fourth support rod (69); A latch pin (70) is slidably connected to the first shaft sleeve (65), and a plug plate (72) is fixedly arranged on the L-shaped rotating shaft (66) directly below the latch pin (70). The plug plate (72) is provided with a plug hole (73) for plugging and cooperating with the latch pin (70).

8. The multifunctional baby stroller according to claim 1, characterized in that: The baby cabin (2) comprises a cabin body (201), a baby seat (203) adjustably arranged in the cabin body (201), and a cabin cover (202) hinged to the cabin body (201); a ventilation hole (31) is provided on the side wall of the cabin body (201); The cabin cover (202) comprises a cover body (2021) and an observation cover (2022) arranged on the cover body (2021); a protrusion hole (39) is arranged between the cover body (2021) and the cabin body (201); and the observation cover (2022) is covered on the protrusion hole (39).

9. A multifunctional baby stroller according to claim 8, characterized in that: The cabin (201) is provided with a baby compartment (32) and an installation compartment; a fixing frame (40) is fixedly provided in the baby compartment (32), and a first section of a slide rail (41) and a second section of a slide rail (42) arranged at a certain angle to the first section of the slide rail (41) are fixed on both sides of the fixing frame (40); a first roller rolling in the first section of the slide rail and a second roller rolling in the second section of the slide rail are provided on both sides of the baby seat (203); The first sections of the slide rails on both sides are both provided with a first locking position (43) and a second locking position (44); When the infant seat (203) is fixed in the first locking position (43), the infant seat (203) extends out from the extension hole (39), and the infant is in a sitting position on the infant seat (203); When the infant seat (203) is fixed in the second locking position (44), the infant seat (203) is located in the infant compartment (32), and the infant is in a lying position on the infant seat (203).

10. The multifunctional baby stroller according to claim 9, characterized in that: An air conditioning system is arranged in the cabin (201); a battery for supplying power to the air conditioning system is arranged in the installation compartment; The cover body (2021) is provided with a display screen (45); The front end of the baby cabin (2) is provided with a lighting lamp.

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