Baby stroller with adjustable backrest angle

Abstract

The present application discloses a baby stroller with an adjustable backrest angle, which includes a frame; a seat part, the seat part is arranged on the frame; a backrest, the backrest is connected to the seat part or the frame, the backrest can rotate around a first rotation axis to adjust the tilt angle relative to the seat part, and a chute is arranged on the backrest along the height direction; a rocker, the rocker is rotatably connected to the frame around a second rotation axis parallel to the first rotation axis, the rocker includes a limiting section passing through the chute, and the limiting section is parallel to and deviates from the second rotation axis; the backrest has a sitting position and a lying position, in the sitting position, the limiting section is below the second rotation axis in the vertical direction, and the included angle between the plane where the limiting section and the second rotation axis are located and the horizontal plane is greater than or equal to 10°. By utilizing the cooperation relationship between the chute and the rocker, the locking and limiting of the rotation angle of the backrest are completed, which is convenient to operate, reduces costs, and the structure is lighter.

Description

Technical Field

[0001] The present invention relates to the technical field of children's vehicles, and particularly to a baby stroller that is convenient for adjusting the backrest angle of the seat part. Background Art

[0002] In the related art, baby strollers are used to carry children when going out. Currently, there are a variety of baby strollers. The seat parts of some baby strollers include backs with adjustable tilt angles, so that the seat parts of the baby strollers have different leaning angles.

[0003] Generally, the seat parts of baby strollers are folded by rotation and a limit locking device is used to adjust the tilt angle of the backrest. However, the number of rods for adjusting the backrest angle is different, and the connection relationships and connection positions between the rods are different, so the folding principles and folding methods are different. At the same time, the space occupied by the set limit locking device is relatively large, increasing the volume of the baby stroller, and the operation is complex and costly. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a baby stroller with an adjustable backrest angle, the structure of the baby stroller is light, and it is convenient to adjust the tilt angle of the backrest of the seat part.

[0005] A baby stroller with an adjustable backrest angle according to the present application includes: a frame; a seat portion provided on the frame; a backrest connected to the seat portion or the frame, the backrest being rotatable about a first rotation axis to adjust the tilt angle relative to the seat portion, and the backrest having a chute along the height direction; a rocker arm rotatably connected to the frame about a second rotation axis parallel to the first rotation axis, the rocker arm including a limiting section passing through the chute, and the limiting section being parallel to and offset from the second rotation axis. Wherein, the distance between the first rotation axis and the second rotation axis is D1, the distance between the limiting section and the second rotation axis is D2, the distance from the lower end of the chute to the first axis is D3, and the distance from the upper end of the chute to the first axis is D4; D2 + D3 > D1, and D4 - D2 > D1. The backrest can be rotated about the first rotation axis until the limiting section is in front of the plane where the first rotation axis and the second rotation axis are located, and the limiting section abuts against the bottom of the chute, at this time the backrest is limited in the sitting position; the backrest can also be rotated about the first rotation axis until the limiting section is behind the plane where the first rotation axis and the second rotation axis are located, and the limiting section abuts against the bottom of the chute, at this time the backrest is limited in the lying position. When the backrest is limited in the sitting position, the limiting section is below the second rotation axis in the vertical direction, and the angle between the plane where the limiting section and the second rotation axis are located and the horizontal plane is greater than or equal to 10°.

[0006] For the baby stroller with an adjustable backrest angle according to the present application, when the rocker arm is toggled to rotate the limiting section, the angle of the backrest relative to the seat portion can be adjusted, making the use of the baby stroller more convenient and comfortable. The limiting section of the rocker arm is arranged in the chute on the backrest, and the chute plays a role in guiding and limiting the rocker arm. In the present application, by reasonably configuring the distance between the first rotation axis and the second rotation axis, the distance between the limiting section and the second rotation axis, the distance from the lower end of the chute to the first axis, and the distance from the upper end of the chute to the first rotation axis, when the backrest rotates until the limiting section slides to the bottom of the chute, the further sliding of the limiting section is restricted, and further the rotation of the backrest is restricted, so that the backrest is kept in the sitting position or the lying position.

[0007] More specifically, the distance between the first and second rotational axes is D1, the distance between the stop and the second rotational axis is D2, the distance between the lower end of the chute and the first axis is D3, and the distance between the upper end of the chute and the first axis is D4; D2 + D3 > D1, and D4 - D2 > D1. During the backrest rotation process, the rocker rotates about the second rotational axis. During the rocker rotation process, there are two stop points: one for the sitting position with a small backrest angle, and the other for the reclining position with a large backrest angle. Both stop points are abutted by the rocker against the lower end of the chute. At the upper stop point of the backrest in the sitting position, the rocker abuts against the lower end of the chute, and the angle between the limiting section and the plane of the second rotation axis and the horizontal plane is greater than or equal to 10 degrees. Therefore, the rocker will not move away from this upper stop point unless there is an external force, thereby stably maintaining the backrest in the sitting position. At the lower stop point of the backrest in the supine position, the rocker abuts against the lower end of the chute. At this time, the potential energy within the system composed of the backrest and the rocker is minimized. Therefore, the backrest will not actively move away from this lower stop point unless there is an external force, thereby stably maintaining the backrest in the supine position. The locking limit for the rotation angle of the backrest of the child stroller with an adjustable backrest angle provided by this application has a simple structure, is easy to operate, and the locked or released state is visible, and the locked state is reliable and stable.

[0008] According to the stroller with adjustable backrest angle of the present application, connecting plates are respectively provided on the left and right inner sides of the frame. The two connecting plates can rotate relative to the frame, and the rotation axes of the two connecting plates are collinear with the second rotation axis. The connecting plates are provided with matching holes along the radial direction, and the rocker includes matching sections located at both ends of the limiting section, and the matching sections are inserted into the matching holes. The rotation axis of the connecting plates is the second rotation axis. The rocker rotates around the frame driven by the connecting plates. The connecting plates can share part of the force on the rocker, reduce the force burden on the rocker, and increase the service life of the rocker. The rocker is arranged in the matching hole by means of a plug-in fit. Compared with the point fit directly connected to the connecting plates, the matching sections and the matching hole are surface-fitted, which has better matching stability.

[0009] Specifically, the connecting plate includes a fixed plate fixedly connected to the vehicle frame and a rotating plate rotatably connected to the fixed plate, and the matching hole is provided on the rotating plate.

[0010] Furthermore, a circular groove is provided on one of the fixed plate and the rotating plate, and a slider is provided on the other of the fixed plate and the rotating plate to fit within the circular groove. The rotating plate is connected to the vehicle frame via the fixed plate. When the rotating plate rotates, the slider slides within the sliding groove, sharing some of the force applied to the fixed plate, thereby reducing the force on the rotating plate and making the connection more stable.

[0011] A baby stroller with an adjustable backrest angle according to the present application, the backrest comprising: two side rods respectively disposed on the left and right sides of the seat portion, and the lower ends of the two side rods being rotatably connected to the rear side of the seat portion; a top rod, with both ends of the top rod connected to the upper ends of the two side rods respectively; two auxiliary rods, with the upper and lower ends of the two auxiliary rods being bent and connected to the side rods to define the chute. The side rods and the top rod are used to define the shape of the backrest. By setting the auxiliary rods on the side rods to define the chute, compared with opening a chute on the side rods, it will not affect the strength of the side rods, and it is easy to process and produce, and the integrity between the auxiliary rods and the side rods is also relatively strong.

[0012] Specifically, the seat portion includes a seat board and two baffles, and the two baffles are connected to the left and right sides of the seat board, and the backrest is rotatably connected to the two baffles. Compared with being connected to the thinner side surface of the seat board, the backrest is rotatably connected to the baffle surface of the baffle, and the connection is more stable; at the same time, connecting to the baffle can avoid occupying the available seating area of the seat board and make full use of the seat board.

[0013] Further, the baby stroller with an adjustable backrest angle further includes: two mounting seats respectively disposed on the two baffles; a canopy frame respectively connected to the two mounting seats. The provided canopy frame is used to shield the seat portion, playing a role of shading and protecting from the sun, so that children sitting on the seat portion are less affected by the external weather environment.

[0014] Optionally, the canopy frame includes: two support rods, both of the two support rods being U-shaped; two support seats respectively detachably connected to the two baffles, and both ends of each support rod being respectively connected to the two support seats. The canopy frame is supported by two support rods, and a covering cloth can be arranged between the two support rods. After the two support rods are unfolded, the function of shading and protecting from the sun can be realized; the support seats can be rotatably connected to the baffles, facilitating the adjustment of the unfolding and folding of the support rods.

[0015] Further, the baby stroller with an adjustable backrest angle further includes an armrest frame, and both ends of the armrest frame are respectively detachably connected to the two baffles. Children sitting on the seat portion can hold the armrest frame, reducing the situation of children falling from the armrest frame and improving the safety of the baby stroller.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 The schematic perspective view shows the backrest of the stroller according to an embodiment of the present application in the sitting position.

[0019] Figure 2 The schematic side view shows the backrest of the stroller according to an embodiment of the present application in the sitting position.

[0020] Figure 3 The schematic side sectional view shows the backrest of the stroller according to an embodiment of the present application in the sitting position.

[0021] Figure 4 Shows the embodiment of the present application Figure 3 Partial enlarged view of the backrest and the rocker.

[0022] Figure 5 The schematic top view shows the backrest of the stroller according to an embodiment of the present application in the sitting position.

[0023] Figure 6 The schematic perspective view shows the backrest of the stroller according to an embodiment of the present application in the lying position.

[0024] Figure 7 The schematic side sectional view shows the backrest of the stroller according to an embodiment of the present application in the lying position.

[0025] Figure 8 Shows the embodiment of the present application Figure 7 Partial enlarged view of the backrest and the rocker.

[0026] Figure 9 The schematic diagram shows a principle of a movement path of the backrest and the rocker of the stroller according to an embodiment of the present application.

[0027] Figure 10 The schematic diagram shows another principle of a movement path of the backrest and the rocker of the stroller according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 1000 - Stroller,

[0030] 10 - Frame,

[0031] 20 - Seat part, 201 - Seat board, 202 - Baffle,

[0032] 30 - Backrest, 301 - Slide groove, 302 - Side rod, 303 - Top rod, 304 - Sub - rod, 305 - First rotation axis,

[0033] 40 - Rocker, 401 - Limit section, 402 - Matching section, 403 - Second rotation axis,

[0034] 50 - Turntable, 501 - Fitting hole,

[0035] 60 - Fixed disk,

[0036] 70 - Mounting base,

[0037] 80 - Roof rack, 801 - Support rod, 802 - Support seat,

[0038] 90 - Armrest frame. Detailed implementation mode

[0039] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0041] This application is made based on the inventor's discovery and understanding of the following facts and problems:

[0042] In the related art, a baby stroller with a backrest adjustment function generally includes a link assembly and a locking structure. The backrest forms a linkage structure with the frame or seat part of the stroller by setting the link assembly to realize the adjustment of the inclination angle of the backrest relative to the frame or seat part. After the inclination angle is adjusted, the backrest is limited by the locking structure so that the backrest remains stable at a suitable inclination angle.

[0043] Currently, the locking structures of baby strollers on the market basically include a guide rail structure, a gear structure or a clamping part structure. After the backrest is adjusted to a preset inclination angle, there will be relevant locking devices for limiting, such as a guide rail lock, a gear lock or a clamping resistance part, to prevent the backrest from moving further. These settings are all separately set outside the link assembly or combined and set on the link structure, making the baby stroller larger in volume and more complex in structure, and the cost will also increase.

[0044] In view of the above problems, the inventor has made structural improvements to the connecting rod assembly. Through the interlocking and locking between the connecting rods, the baby stroller can achieve the adjustment of the backrest angle and the limit fixation only based on the connecting rod assembly, reducing the number of components, making the structure of the baby stroller lightweight, and facilitating the adjustment of the inclination angle of the backrest at the same time.

[0045] The following refers to Figures 1 - 10 Describe a baby stroller with an adjustable backrest angle according to the present application.

[0046] Refer to Figures 1 - 8 As shown in, the baby stroller 1000 with an adjustable backrest angle according to the present application includes a frame 10, a seat part 20, a backrest 30, and a rocker 40. The seat part 20 is arranged on the frame 10, the backrest 30 is connected to the seat part 20 or the frame 10, the angle of the backrest 30 relative to the seat part 20 is adjustable, a chute 301 is provided on the backrest 30, and the backrest 30 has a first rotation axis 305. The rocker 40 is rotatably installed on the frame 10, the rocker 40 has a second rotation axis 403, and the rocker 40 includes a limiting section 401 passing through the chute 301, and the limiting section 401 is parallel to and deviates from the second rotation axis 403. The distance between the first rotation axis 305 and the second rotation axis 403 is D1, the distance between the limiting section 401 and the second rotation axis 403 is D2, the distance from the lower end of the chute 301 to the first axis is D3, and the distance from the upper end of the chute 301 to the first axis is D4; D2 + D3 > D1, and D4 - D2 > D1. The backrest 30 can rotate around the first rotation axis 305 until the limiting section 401 is located in front of the plane where the first rotation axis 305 and the second rotation axis 403 are located, and the limiting section 401 abuts against the bottom of the chute 301. At this time, the backrest 30 is limited in the sitting position; the backrest 30 can also rotate around the first rotation axis 305 until the limiting section 401 is located behind the plane where the first rotation axis 305 and the second rotation axis 403 are located, and the limiting section 401 abuts against the bottom of the chute 301. At this time, the backrest 30 is limited in the lying position. When the backrest 30 is limited in the sitting position, the limiting section 401 is below the second rotation axis 403 in the vertical direction, and the included angle between the plane where the limiting section 401 and the second rotation axis 403 are located and the horizontal plane is greater than or equal to 10°

[0047] During the process of rotating the backrest 30 to adjust the angle, the rocker 40 rotates around the second rotation axis 403. During the rotation of the rocker 40, there are two stop points, one is when the backrest 30 is tilted at a smaller angle and is in a sitting position, and the other is when the backrest 30 is tilted at a larger angle and is in a lying position. Both stop points are supported by the rocker 40 at the lower end of the slide groove 301. At the upper stop point of the backrest 30 in the sitting position, the rocker 40 abuts against the lower end of the chute 301, and the angle between the limiting section 401 and the second rotation axis 403 and the horizontal plane is greater than or equal to 10°. Therefore, the rocker 40 will not move away from this upper stop point unless there is an external force, thereby stably maintaining the backrest 30 in the sitting position. At the lower stop point of the backrest 30 in the supine position, the rocker 40 abuts against the lower end of the chute 301. At this point, the potential energy within the system composed of the backrest 30 and the rocker 40 is minimized. Therefore, the backrest 30 will not actively move away from this lower stop point unless there is an external force, thereby stably maintaining the backrest 30 in the supine position. The child stroller 1000 with an adjustable backrest 30 provided in this application has a simple structure, is easy to operate, and the locked and released states are visible, and the locked state is reliable and stable.

[0048] To facilitate the description of the matching relationship between the rocker 40, the backrest 30 and the slide groove 301, the plane where the first rotation axis 305 and the second rotation axis 403 are located is first set as the first reference plane, the plane where the first rotation axis 305 and the limit section 401 are located is the second reference plane, and the plane where the second rotation axis 403 and the limit section 401 are located is the third reference plane, and the backrest 30 has a sitting position.

[0049] When the backrest 30 is in the sitting position, if the stroller 100 is subjected to an impact, the rocker 40 abuts against the lower end of the chute 301, and the angle between the plane of the stop section 401 and the second rotation axis 403 and the horizontal plane is greater than or equal to 10°. Unless there is an external force, the rocker 40 will not move away from this upper stop point, thereby ensuring that the backrest 30 remains stably in the sitting position. In particular, when a child sits on the seat 20 and leans against the backrest 30, the child applies a backward force to the backrest 30, which, constrained by the chute 301, can only remain in the sitting position. This ensures that the backrest 30 maintains a stable angle in the sitting position, reducing the possibility of the backrest 30 suddenly falling backward under impact, thereby improving user comfort.

[0050] Specifically, under the influence of gravity, the rocker 40 and the backrest 30 both tend to move downward. Without mutual restraint, the backrest 30 tends to rotate backward, while the rocker 40 tends to rotate downward. However, when the backrest is in the sitting position, the limiting segment 401 of the rocker 40 abuts against the bottom of the slide slot 301. At this point, the rocker 40 and backrest 30 rotate in opposite directions. In the absence of an external force, the rocker 40 and backrest 30 cannot slide relative to each other. Consequently, the rocker 40 and backrest 30 are at their first end point of motion. In this state, unless there is an external force acting on the backrest 30 to offset the gravitational potential energy, the backrest 30 remains locked and will not automatically move away from its first end point of motion. Furthermore, when a person sits on the seat 20 and leans against the backrest 30, the gravitational force of the person's body aligns with the gravitational potential energy of the backrest 30 and the rocker 40, ensuring that the backrest 30 remains securely supported by the occupant.

[0051] Similarly, when the backrest 30 is in the supine position, the rocker 40 abuts against the lower end of the slide slot 301. At this time, the potential energy in the system composed of the backrest 30 and the rocker 40 is minimal. If no external force is applied to the backrest 30 or the rocker 40, the backrest 30 and the rocker 40 will not actively move away from the lower stop point.

[0052] The present invention provides a sliding groove 301 on the backrest 30 and a rocker 40 rotatably connected to the frame 10 to achieve position limiting of the backrest 30's angle adjustment. Based on the motion principle of the crank rocker 40 in the connecting rod structure, the inventors rationally utilize the cooperation between the sliding groove 301 and the rocker 40, so that when the backrest 30 is in the sitting position or the reclining position, the relative movement of the rocker 40 and the sliding groove 301 reaches the end point of the movement, thus achieving locking and limiting the rotation angle of the backrest 30. The invention has a simple structure, is easy to operate, and the locked and released states are visible, and the locked state is reliable and stable. In some embodiments of the child stroller 1000, the inventors fully utilize the cooperation between the rocker 40 and the sliding groove 301 to design a child stroller 1000 with a backrest 30 having two selectable angles in the sitting position and the reclining position. In the sitting position, the backrest 30 is nearly upright relative to the horizontal plane, while in the reclining position, the backrest 30 is nearly tilted relative to the horizontal plane. Therefore, in some embodiments, the sitting position is referred to as the upright position, and the reclining position is referred to as the tilted position. The backrest 30 can be used for sitting and reclining at these two angles, respectively. The backrest 30 can be switched between the sitting and reclining modes by manually manipulating the rocker 40.

[0053] like Figures 6 - 8 As shown, when the backrest 30 is in the tilted state, the backrest 30 has a supine position, that is, when the backrest 30 moves to the supine position, the limiting section 401 stops at the bottom of the slide groove 301, and the limiting section 401 is located below the first reference surface.

[0054] Further, the angle between the third reference plane and the horizontal plane is approximately equal to 90 degrees, that is, the rocker 40 is in a vertical state with the limiting section 401 facing downward.

[0055] Refer to Figures 3 - 4 , at this time, the backrest 30 is in an upright state. When changing from the upright state to the inclined state, first apply an obliquely upward force to the backrest 30 to make the backrest 30 move forward first. At this time, the gravitational potential energy of the rocker 40 is offset by the external force and moves upward until the rocker 40 is horizontal. Then apply an upward force to the rocker 40 and pull the rocker 40 backward. The rocker 40 rotates backward around the second rotation axis 403 and after the rocker 40 rotates upward to be perpendicular to the horizontal plane, the external force can be stopped. The rocker 40 and the backrest 30 automatically fall under the action of gravitational potential energy and switch to the inclined state. It is also possible to continue applying force to slowly move the rocker 40 and the backrest 30 to the inclined state, reducing the impact and scraping between components during automatic falling. At this time, the rocker 40 abuts against the bottom of the chute 301 and is at the position of the second motion stop point. At this time, if there is no external force offsetting the gravitational potential energy acting on the backrest 30, the backrest 30 will be in a locked state and will not automatically disengage from the position of the second motion stop point. At the same time, when someone sits on the seat part 20 and lies on the backrest 30, the gravity of the human body is in the same direction as the gravitational potential energy of the backrest 30 and the rocker 40 at this time. Therefore, the backrest 30 will firmly act as a support for the occupant.

[0056] It should be noted that the length of the chute 301 on the backrest 30 of the present invention is much larger than the rotatable radius of the rocker 40. Refer to Figure 9 , set the path of the bottom of the chute 301 rotating around the first rotation axis 305 as circle S1, the path of the top of the chute 301 rotating around the first rotation axis 305 as circle S2, and the path of the limiting section 401 of the rocker 40 rotating around the second rotation axis 403 as circle S3. The center of circle S3 is higher than the center of circle S1. Circle S3 intersects circle S1 at two points P and Q. Among them, point P is the state point where the limiting section 401 of the rocker 40 abuts against the bottom of the chute 301 when the backrest 30 is in the upright state. At this time, the connection line between the center of circle S3 and point P is the rocker 40, and the connection line between the center of circle S1 and point P and its extension line are the backrest 30. Point Q is the state point where the limiting section 401 of the rocker 40 abuts against the bottom of the chute 301 when the backrest 30 is in the inclined state. At this time, the connection line between the center of circle S3 and point P is the rocker 40, and the connection line between the center of circle S1 and point Q and its extension line are the backrest 30. And circle S3 does not intersect circle S2. At this time, the included angle between the connection line between the center of circle S3 and point Q and the connection line between the center of circle S1 and point Q is an obtuse angle.

[0057] In some embodiments, in addition to the case where the angle between the third reference plane and the horizontal plane is equal to 90 degrees in the above embodiments for the use mode of the inclined state of the backrest 30, it can also be:

[0058] When the backrest 30 is in the tilted state, the backrest 30 has a supine position. When the backrest 30 moves to the supine position, the limiting section 401 stops at the bottom of the slide groove 301. The limiting section 401 is located below the first reference surface. Figure 8 As shown, the limiting section 401 is located on the side of the turntable 50 away from the first rotation axis 305, and at this time, the angle between the second reference plane and the third reference plane is an obtuse angle.

[0059] At this point, the backrest 30 is in a tilted position. Since both the rocker 40 and the backrest 30 possess downward gravitational potential energy, the limiting segment 401 of the rocker 40 abuts against the bottom of the slideway 301. Therefore, the rocker 40 and the backrest 30 cannot slide relative to each other without an external force acting on them. Consequently, the rocker 40 and the backrest 30 are at their second end point of motion. In this position, unless an external force acts on the backrest 30 to offset the gravitational potential energy, the backrest 30 remains locked and prevents it from automatically moving away from its second end point of motion. Furthermore, when a person sits on the seat 20 and leans against the backrest 30, the gravitational force of the person's body aligns with the gravitational potential energy of the backrest 30 and the rocker 40, ensuring that the backrest 30 remains securely supported by the occupant.

[0060] See also Figure 10 At this time, the center of circle S3 is higher than the center of circle S1, and circle S3 intersects with circle S1 at two points P and Q, where point P is the state point where the limiting section 401 of the rocker 40 stops at the bottom of the slide groove 301 when the backrest 30 is in an upright state. At this time, the line connecting the center of circle S3 and point P is the rocker 40, and the line connecting the center of circle S1 and point P and the extended line are the backrest 30; point Q is the state point where the limiting section 401 of the rocker 40 stops at the bottom of the slide groove 301 when the backrest 30 is in an inclined state. At this time, the line connecting the center of circle S3 and point P is the rocker 40, and the line connecting the center of circle S1 and point Q and the extended line are the backrest 30, and circle S3 does not intersect with circle S2. At this time, the angle between the line connecting the center of circle S3 and point Q and the line connecting the center of circle S1 and point Q is an obtuse angle.

[0061] For further information, see Figures 1 - 8 The frame 10 has two frame structures, with the seat 20 and backrest 30 sandwiched between them. A slide groove 301 is provided on each frame structure, and the ends of the rocker 40 slide into the slide grooves 301 on the two frame structures. The shape of the rocker 40 is not specifically limited and can be a U-shaped rod or a rod with a central bend. The bend facilitates manual lifting of the rocker 40 to adjust the backrest 30's usage mode.

[0062] Some embodiments of the stroller 1000, see Figures 1 - 6, on the inner sides of the left and right of the frame 10, connection plates are respectively provided correspondingly. The two connection plates can rotate relative to the frame 10, and the rotation axes of the two connection plates are collinear with the second rotation axis 403; the connection plates are provided with fitting holes 501 along the radial direction. The rocker 40 includes fitting segments 402 located at both ends of the limiting segment 401, and the fitting segments 402 are inserted into the fitting holes 501. The rotation axis of the turntable 50 is the second rotation axis 403. The rocker 40 rotates around the frame 10 driven by the turntable 50. The turntable 50 can share part of the force borne by the rocker 40, reduce the force-bearing burden of the rocker 40, and improve the service life of the rocker 40.

[0063] For the stroller 1000 of some embodiments, refer to Figure 3 , the connection plate includes a fixed plate 60 fixedly connected to the frame 10 and a turntable 50 rotatably connected to the fixed plate 60, and the fitting hole 501 is arranged on the turntable 50.

[0064] It should be noted that after the rocker 40 is fitted in the fitting hole 501, it can be fixedly connected by a detachable method such as a screw or a buckle, or can be fixedly connected by a welding method.

[0065] For the stroller 1000 of some embodiments, refer to Figure 3 , a circular groove is provided on one of the fixed plate 60 and the turntable 50, and a slider that fits in the circular groove is provided on the other of the fixed plate 60 and the turntable 50. The turntable 50 is connected to the frame 10 through the fixed plate 60. When the turntable 50 rotates, it slides in the chute 301 through the cooperation of the slider, sharing part of the force to the fixed plate 60, reducing the force borne by the turntable 50, and making the connection more stable.

[0066] In some embodiments, one side of the fixed plate 60 is fixedly connected to the frame 10, and the other side has a circular recess. The inner wall of the recess is provided with a circular groove. The turntable 50 is a circular turntable 50 matching the recess and is connected to the recess by sliders arranged around it and clamped in the circular groove, realizing the connection with the recess. The sliders can slide in the circular groove so that the turntable 50 can rotate relative to the fixed plate 60.

[0067] For the stroller 1000 of some embodiments, refer to Figures 1 - 3 , the backrest 30 includes a top rod 303, two side rods 302 and two auxiliary rods 304. The two side rods 302 are respectively arranged on the left and right sides of the seat part 20, and the lower ends of the two side rods 302 are rotatably connected to the rear side of the seat part 20; both ends of the top rod 303 are respectively connected to the upper ends of the two side rods 302; the upper and lower ends of the two auxiliary rods 304 are bent and connected to the side rods 302 to define a chute 301.

[0068] The side rod 302 and the top rod 303 are used to define the shape of the backrest 30. By arranging the auxiliary rod 304 on the side rod 302, the chute 301 is defined. Compared with arranging the chute 301 on the side rod 302, it will not affect the strength of the side rod 302, and it is easy to process and produce. The integrity between the auxiliary rod 304 and the side rod 302 is also relatively strong. Specifically, the auxiliary rod 304 is a U-shaped rod with both ends bent. The two ends of the auxiliary rod 304 are connected to the lower part of the side rod 302 by welding or clamping. The chute 301 is defined between the auxiliary rod 304 and the side rod 302. The middle part of the rod body of the rocker 40 is inserted between the chutes 301 on the left and right sides and slides within the chute 301.

[0069] Specifically, referring to Figures 1 - 3 , the seat part 20 includes a seat board 201 and two baffle plates 202. The two baffle plates 202 are connected to the left and right sides of the seat board 201. The backrest 30 is rotatably connected to the two baffle plates 202. Compared with being connected to the thinner side surface of the seat board 201, the backrest 30 is rotatably connected to the baffle plate surface of the baffle plate 202, and the connection is more stable. At the same time, connecting to the baffle plate 202 can avoid occupying the available seating area of the seat board 201, making the seat board 201 fully utilized.

[0070] For the baby stroller 1000 in some embodiments, referring to Figure 1 , the baby stroller 1000 further includes two mounting seats 70 and a canopy frame 80. The two mounting seats 70 are respectively arranged on the two baffle plates 202, and the canopy frame 80 is respectively connected to the two mounting seats 70. The provided canopy frame 80 is used to shield the seat part 20, playing a role of shading and protecting from the sun, so that when a child sits on the seat part 20, it is less affected by the external weather environment.

[0071] Optionally, referring to Figure 1 , the canopy frame 80 is composed of two support rods 801 and two support seats 802. The two support rods 801 are both U-shaped. The two support seats 802 are respectively detachably connected to the two baffle plates 202, and the two ends of each support rod 801 are respectively connected to the two support seats 802. The canopy frame is supported by the two support rods 801. A sunshade cloth can be arranged between the two support rods 801. After the two support rods 801 are unfolded, the function of shading and protecting from the sun can be achieved. The support seat 802 can be rotatably connected to the baffle plate 202, facilitating the adjustment of the unfolding and folding of the support rod 801.

[0072] Furthermore, referring to Figure 1 , the baby stroller 1000 with an adjustable backrest angle of the present application further includes an armrest frame 90. The two ends of the armrest frame 90 are respectively detachably connected to the two baffle plates 202. A child sitting on the seat part 20 can hold the armrest frame 90, reducing the situation of the child falling from the armrest frame 90 and improving the safety of the baby stroller 1000.

[0073] In the description of this specification, the descriptions referring to terms such as "embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0074] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A baby stroller with an adjustable backrest angle, characterized in that, Comprising: Frame; Seat part, the seat part is arranged on the frame; Backrest, the backrest is connected to the seat part or the frame, the backrest can rotate around a first rotation axis to adjust the inclination angle relative to the seat part, and a chute is arranged along the height direction of the backrest; Rocking bar, the rocking bar is rotatably connected to the frame around a second rotation axis parallel to the first rotation axis, the rocking bar includes a limiting section passing through the chute, and the limiting section is parallel to and deviates from the second rotation axis; wherein, The distance between the first rotation axis and the second rotation axis is D1, the distance between the limiting section and the second rotation axis is D2, the distance from the lower end of the chute to the first rotation axis is D3, and the distance from the upper end of the chute to the first rotation axis is D4; D2 + D3 > D1, and D4 - D2 > D1; The backrest can rotate around the first rotation axis until the limiting section is in front of the plane where the first rotation axis and the second rotation axis are located, and the limiting section abuts against the bottom of the chute, at this time the backrest is limited in the sitting position; the backrest can also rotate around the first rotation axis until the limiting section is behind the plane where the first rotation axis and the second rotation axis are located, and the limiting section abuts against the bottom of the chute, at this time the backrest is limited in the lying position; When the backrest is limited in the sitting position, the limiting section is below the second rotation axis in the vertical direction, and the included angle between the plane where the limiting section and the second rotation axis are located and the horizontal plane is greater than or equal to 10°.

2. The child stroller with an adjustable backrest angle according to claim 1, wherein, Connection disks are respectively arranged corresponding to the left and right inner sides of the frame, the two connection disks can rotate relative to the frame and the rotation axes of the two connection disks are collinear with the second rotation axis; the connection disks are provided with fitting holes along the radial direction, the rocking bar includes fitting sections located at both ends of the limiting section, and the fitting sections are inserted into the fitting holes.

3. The child stroller with an adjustable backrest angle according to claim 2, characterized in that, The connection disk includes a fixed disk fixedly connected to the frame and a rotating disk rotatably connected to the fixed disk, and the fitting hole is arranged on the rotating disk.

4. The stroller for children with an adjustable backrest angle according to claim 3, wherein, One of the fixed disk and the rotating disk is provided with a circular groove, and the other of the fixed disk and the rotating disk is provided with a slider fitted in the circular groove.

5. The child stroller with an adjustable backrest angle according to claim 1, characterized in that, The backrest includes: Two side bars, the two side bars are respectively arranged on the left and right sides of the seat part, and the lower ends of the two side bars are rotatably connected to the rear side of the seat part; Top bar, both ends of the top bar are respectively connected to the upper ends of the two side bars; Two auxiliary bars, the upper and lower ends of the two auxiliary bars are bent and connected to the side bars to define the chute.

6. The stroller for children with an adjustable backrest angle according to any one of claims 1-5, characterized in that, The seat part includes a seat board and two baffles, the two baffles are connected to the left and right sides of the seat board, and the backrest is rotatably connected to the two baffles.

7. The child stroller with an adjustable backrest angle according to claim 6, wherein, The baby stroller with an adjustable backrest angle further includes: Two mounting seats, the two mounting seats are respectively arranged on the two baffles; Canopy frame, the canopy frame is respectively connected to the two mounting seats.

8. The child stroller with an adjustable backrest angle according to claim 7, characterized in that, The canopy frame includes: Two support bars, both support bars are U-shaped; Two supporting seats, the two supporting seats are respectively detachably connected to the two baffles, and two ends of each of the support rods are respectively connected to the two supporting seats.

9. The stroller for children with an adjustable backrest angle according to claim 6, characterized in that, The child stroller with adjustable backrest angle further includes: an armrest frame, and two ends of the armrest frame are respectively detachably connected to the two baffles.

Images