Backrest angle adjusting structure of a child stroller

Abstract

The application discloses a child stroller backrest angle adjusting structure and belongs to the field of child strollers. The backrest angle adjusting structure comprises a frame, a seat plate arranged on the frame, a backrest hingedly arranged at the back side of the seat plate, and an angle adjusting mechanism for adjusting the angle of the backrest. The back side of the frame is provided with a push rod, the top end of the push rod is fixedly connected with a handle, and the bottom of the frame is provided with a moving assembly. The angle adjusting mechanism comprises a threaded sleeve and a threaded screw inserted into the top of the threaded sleeve. The top of the threaded screw is hingedly connected with the back end of the backrest. The bottom of the threaded sleeve is rotatably connected with a rotating disc, and the rotating disc is hingedly connected with the push rod. The backrest can be driven to rotate along the hinging shaft of the seat plate by one hand, the angle of the backrest is adjusted, the problem that the existing child stroller needs to be operated by two hands and is complicated to operate is effectively solved, the applicability of the child stroller device is remarkably improved, and the self-adjusting demand of special users such as upper limb disabled people is met.

Description

Technical Field

[0001] This application relates to the field of stroller technology, specifically a stroller backrest angle adjustment structure. Background Technology

[0002] In the field of child care equipment, strollers are commonly used tools for carrying and caring for children. With their outstanding advantages of low cost and durability, they are widely used in family outings, outdoor parent-child activities, and other scenarios, providing important convenience for parents to care for their children. They are one of the indispensable auxiliary devices in the process of children's growth.

[0003] With the diversification of needs for stroller use, backrest angle adjustment has become a key design feature to improve product comfort. Most existing strollers are equipped with this function to accommodate children's different sitting and lying postures. However, the current mainstream backrest angle adjustment structure and operation method still have significant limitations: the adjustment process relies on a snap-lock mechanism located at both ends of the backrest frame. The specific operation procedure is as follows: the user must first bend down and squat, then use both hands to contact and release the snap-lock mechanism at both ends of the backrest. While maintaining the squatting posture, the user manually pushes the backrest to adjust it to the target angle. Once the angle is determined, the user releases both hands to allow the snap-lock mechanisms to reset and engage in the locking slots, thus fixing the relative position of the backrest. The squatting operation not only increases the physical burden on the user, but also significantly reduces the ease of operation, especially in scenarios where frequent angle adjustments are required. The operation relies on the coordination of both hands and cannot be operated with one hand. This deficiency has a significant limitation on special users such as people with upper limb disabilities. When these people use strollers independently, they cannot complete the continuous operation of unfastening the buckles, adjusting the angle and relocking with both hands, and therefore cannot independently adjust the backrest angle. This limits the applicability of existing strollers and makes it difficult to meet the needs of users with different physical conditions.

[0004] Therefore, this application provides a stroller backrest angle adjustment structure to solve the above problems. Utility Model Content

[0005] This application provides a backrest angle adjustment structure for a child stroller, aiming to solve the problems mentioned in the background art, such as the need to bend over and squat to operate the backrest angle adjustment of existing child strollers, the reliance on the coordination of both hands and the inability to complete the adjustment with one hand, resulting in low operation convenience, and special users such as people with upper limb disabilities being unable to adjust the backrest angle independently, thus limiting the scope of application.

[0006] To achieve the above objectives, this application provides the following technical solution: a stroller backrest angle adjustment structure, including a frame, a seat plate mounted on the frame, a backrest hinged to the rear side of the seat plate, and an angle adjustment mechanism for adjusting the backrest angle. A push rod is provided on the rear side of the frame, with a handle fixedly connected to the top of the push rod, and a movable component is provided at the bottom of the frame. The angle adjustment mechanism includes a threaded sleeve and a screw threaded into the top of the threaded sleeve. The top of the screw is hinged to the rear end of the backrest, and a turntable is rotatably connected to the bottom of the threaded sleeve. The turntable is hinged to the push rod. When the user needs to adjust the backrest angle, one hand acts on the threaded sleeve (or with the subsequent protruding rod) to drive its rotation. During the rotation of the threaded sleeve, the screw is driven to rise and fall axially along the threaded sleeve through the threaded engagement. When the screw rises and falls, it pushes and pulls the backrest, causing the backrest to rotate around the hinge axis with the seat plate, thereby achieving backrest angle adjustment. The entire process does not require the use of both hands and can be completed with one hand.

[0007] Preferably, to facilitate the rotation of the threaded sleeve, multiple protruding rods are fixedly connected to the outer wall of the threaded sleeve at equal intervals in a ring. This effectively increases the friction between the hand and the threaded sleeve, preventing slippage when the hand rotates the threaded sleeve, allowing the user to drive the threaded sleeve more easily and effortlessly, and further optimizing the ease of operation for adjusting the backrest angle.

[0008] Preferably, to improve the protection of the screw: a retractable rubber bellows is fitted around the outside of the screw, the top of the bellows is fixedly connected to the top of the screw, and the bottom of the bellows is rotatably connected to the top of the threaded sleeve. This effectively protects the screw from contamination by external dust and impurities, prevents damage to the screw's thread structure due to jamming or impacts, ensures the fitting accuracy and service life of the screw and threaded sleeve, and ensures the stable operation of the angle adjustment mechanism.

[0009] Preferably, the movable component includes fixed casters symmetrically mounted on the rear side of the frame and movable casters symmetrically mounted on the front side of the frame. This allows the stroller to move flexibly in different scenarios while ensuring stability during movement, meeting the needs of users for pushing the stroller in various scenarios such as daily outings and outdoor activities, and improving the stroller's flexibility and practicality.

[0010] Preferably, for convenient storage and carrying of items: a storage box is fixedly installed on the frame and below the seat. This provides users with dedicated storage space for items, making it convenient to store and carry children's products (such as diapers, toys, baby food, etc.) or personal belongings, increasing the storage function of the stroller, improving ease of use, and avoiding loss or inconvenience caused by items being placed randomly.

[0011] Preferably, to improve the comfort of children riding in the stroller, the system further includes an airbag cushion mounted on the seat panel. The horizontal section of the airbag cushion is connected to the seat panel via straps, and the vertical section is connected to the backrest via straps. This significantly improves the comfort of children riding in the stroller. The airbag cushion reduces the impact of external bumps on the child's body through its cushioning effect, while conforming to the child's body curves to enhance support and make the ride more comfortable and less tiring.

[0012] This application enables the backrest to rotate along the hinge axis of the seat plate with one hand, thereby adjusting the backrest angle. This effectively solves the problem that existing strollers require two hands to operate and are cumbersome to operate, significantly improving the applicability of the stroller device, especially meeting the self-adjustment needs of special users such as people with upper limb disabilities.

[0013] This application utilizes a bellows design to effectively protect the screw, preventing it from being contaminated by external dust and impurities, preventing damage to the screw's thread structure due to jamming or impacts, ensuring the fitting accuracy and service life of the screw and threaded sleeve, and guaranteeing the stable operation of the angle adjustment mechanism.

[0014] The airbag design significantly improves the comfort of children riding in strollers. The airbag cushioning reduces the impact of external bumps on the child's body, while conforming to the child's body curves to enhance support and make the ride more comfortable and less tiring. Attached Figure Description

[0015] Figure 1 A schematic diagram of a child stroller backrest angle adjustment structure; Figure 2 for Figure 1 A schematic diagram of the other side of the structure; Figure 3 This is a cross-sectional view of the angle adjustment mechanism.

[0016] In the picture: 1. Frame; 2. Seat; 3. Backrest; 4. Angle adjustment mechanism; 41. Threaded sleeve; 411. Protruding rod; 42. Screw; 421. Corrugated pipe; 43. Turntable; 5. Push rod; 51. Handle; 6. Moving assembly; 61. Fixed caster; 62. Movable caster; 7. Storage box; 8. Airbag cushion. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Example 1 This embodiment provides a stroller backrest angle adjustment structure, such as Figure 1-3 As shown, the backrest angle adjustment structure includes a frame 1, a seat plate 2 mounted on the frame 1, a backrest 3 hinged to the rear side of the seat plate 2, and an angle adjustment mechanism 4 for adjusting the angle of the backrest 3. A push rod 5 is provided on the rear side of the frame 1, and a handle 51 is fixedly connected to the top of the push rod 5. A movable component 6 is provided at the bottom of the frame 1. The angle adjustment mechanism 4 includes a threaded sleeve 41 and a screw 42 threadedly inserted into the top of the threaded sleeve 41. The top of the screw 42 is hinged to the rear end of the backrest 3. A turntable 43 is rotatably connected to the bottom of the threaded sleeve 41, and the turntable 43 is hinged to the push rod 5. This allows for single-handed rotation of the backrest 3 along the hinge axis of the seat plate 2 to adjust the angle of the backrest 3, effectively solving the problem of existing strollers requiring two hands and being cumbersome to operate. This significantly improves the applicability of the stroller device, especially meeting the self-adjustment needs of special users such as people with upper limb disabilities. When the user needs to adjust the angle of the backrest 3, he / she can use one hand to drive the threaded sleeve 41 (or with the subsequent protrusion 411) to rotate. During the rotation of the threaded sleeve 41, the screw 42 is driven to rise and fall along the axial direction of the threaded sleeve 41 through the threaded engagement. When the screw 42 rises and falls, it will push and pull the backrest 3, causing the backrest 3 to rotate around the hinge axis with the seat plate 2, thereby realizing the adjustment of the angle of the backrest 3. The whole process does not require the coordination of both hands and can be completed with one hand.

[0019] To facilitate the rotation of the threaded sleeve 41, multiple protruding rods 411 are fixedly connected to the outer wall of the threaded sleeve 41 at equal intervals in a ring. This effectively increases the friction between the hand and the threaded sleeve 41, preventing slippage when the hand rotates the threaded sleeve 41, allowing the user to drive the threaded sleeve 41 more easily and effortlessly, further optimizing the ease of operation of the 3-angle adjustment of the backrest. When the user rotates the threaded sleeve 41 with one hand, the hand contacts the protruding rods 411, which increase the contact friction between the hand and the threaded sleeve 41. Compared to the smooth outer wall of the threaded sleeve 41, it is easier to rotate the threaded sleeve 41 when the hand applies force, reducing slippage and lowering the difficulty of driving.

[0020] To enhance the protection of the screw 42, a retractable rubber bellows 421 is fitted around the screw 42. The top of the bellows 421 is fixedly connected to the top of the screw 42, and the bottom of the bellows 421 is rotatably connected to the top of the threaded sleeve 41. This effectively protects the screw 42 from external dust and impurities, prevents damage to the screw 42's threaded structure due to jamming or impact, ensures the fitting accuracy and service life of the screw 42 and the threaded sleeve 41, and ensures the stable operation of the angle adjustment mechanism 4. When the screw 42 rotates and moves axially up and down with the threaded sleeve 41, the bellows 421 expands and contracts synchronously with the screw 42's movement, always maintaining a complete enclosure of the screw 42. This isolates external dust, sand, and other impurities from entering the fitting gap between the screw 42 and the threaded sleeve 41, while also preventing the screw 42 from directly colliding with external objects, thus protecting the screw 42.

[0021] The moving component 6 includes fixed casters 61 symmetrically mounted on the rear side of the frame 1 and movable casters 62 symmetrically mounted on the front side of the frame 1. This allows the stroller to move flexibly in different scenarios while ensuring stability during movement, meeting the needs of users for pushing the stroller in various situations such as daily outings and outdoor activities, thus improving the stroller's flexibility and practicality. When pushing the stroller, the fixed casters 61 on the rear side of the frame 1 primarily provide stability for straight-line movement, ensuring the stroller does not easily deviate when traveling in a straight line. The movable casters 62 on the front side of the frame 1 can flexibly change the steering direction. When the user changes the direction of the pushing force through the handle 51 of the push rod 5, the movable casters 62 can adjust their rotation direction accordingly, causing the stroller to turn. The fixed casters 61 and the movable casters 62 work together to achieve flexible movement of the stroller.

[0022] To facilitate the storage and carrying of items, a storage box 7 is fixedly installed on the frame 1, located below the seat 2. This provides users with a dedicated storage space for children's products (such as diapers, toys, baby food, etc.) or personal belongings, increasing the stroller's storage function, improving ease of use, and preventing items from being lost or inconvenient to retrieve due to careless placement. It fully utilizes the unused space under the seat 2, forming a closed storage area. When using the stroller, users can directly place the items they need to carry into the storage box 7. The fixed installation of the storage box 7 ensures that it will not shake or fall off during stroller movement. To retrieve items, simply open the storage box 7, achieving convenient storage and carrying of items.

[0023] Example 2 Unlike Embodiment 1, to improve the comfort of children riding in the stroller, an airbag cushion 8 is also included, which is mounted on the seat 2. The horizontal section of the airbag cushion 8 is connected to the seat 2 via straps, and the vertical section is connected to the backrest 3 via straps. This significantly improves the comfort of children riding in the stroller. The cushioning effect of the airbag cushion 8 reduces the impact of external bumps on the child's body, while conforming to the child's body curves to enhance support and make the child more comfortable and less prone to fatigue. The straps ensure that the airbag cushion 8 does not shift during the child's ride. The airbag cushion 8 itself has elastic cushioning properties. When a child rides in the stroller, their buttocks contact the horizontal section of the airbag cushion 8, and their back contacts the vertical section. The airbag cushion 8 can elastically deform according to the child's body pressure, cushioning the impact of bumps generated during the stroller's movement, while conforming to the child's body curves to provide stable support, thereby improving riding comfort.

[0024] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0025] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A stroller backrest angle adjustment structure, comprising a frame (1), a seat plate (2) disposed on the frame (1), a backrest (3) hinged to the rear side of the seat plate (2), and an angle adjustment mechanism (4) for adjusting the angle of the backrest (3), wherein a push rod (5) is disposed on the rear side of the frame (1), a handle (51) is fixedly connected to the top end of the push rod (5), and a moving component (6) is disposed at the bottom of the frame (1); Its features are: The angle adjustment mechanism (4) includes a threaded sleeve (41) and a screw (42) threaded into the top of the threaded sleeve (41). The top of the screw (42) is hinged to the rear end of the backrest (3). A turntable (43) is rotatably connected to the bottom of the threaded sleeve (41). The turntable (43) is hinged to the push rod (5).

2. The stroller backrest angle adjustment structure according to claim 1, characterized in that: The outer wall of the threaded sleeve (41) is fixedly connected with multiple protrusions (411) at equal intervals in a ring.

3. The stroller backrest angle adjustment structure according to claim 1, characterized in that: The screw (42) is fitted with a retractable rubber bellows (421), the top of the bellows (421) is fixedly connected to the top of the screw (42), and the bottom of the bellows (421) is rotatably connected to the top of the threaded sleeve (41).

4. The stroller backrest angle adjustment structure according to claim 1, characterized in that: The movable component (6) includes fixed casters (61) symmetrically mounted on the rear side of the frame (1) and movable casters (62) symmetrically mounted on the front side of the frame (1).

5. The stroller backrest angle adjustment structure according to claim 1, characterized in that: A storage box (7) is fixedly installed on the frame (1) and below the seat plate (2).

6. The stroller backrest angle adjustment structure according to any one of claims 1-5, characterized in that: It also includes an airbag cushion (8) disposed on the seat plate (2), the horizontal section of which is connected to the seat plate (2) by a strap, and the vertical section is connected to the backrest (3) by a strap.

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