Child seat

Abstract

The utility model discloses a children's seat belongs to children's safety protection equipment technical field. The utility model adopts technical scheme for a children's seat, including seat main part and the side wing of symmetrical setting at seat main part both sides, the side wing lower extreme is connected with seat main part lateral wall through rotating component rotation, be equipped with the drive assembly for driving both sides side wing synchronous mutual rotation on seat main part, the utility model discloses the synchronous mutual adjustment of both sides side wing is realized through drive assembly, realizes the accurate synchronous adjustment of both sides side wing interval, ensures the balanced force of both sides of children's body. The dynamic wrapping function of side wing effectively adapts to the protection demand of different body size children, reduces the lateral displacement amount when colliding. Mechanical linkage system improves the operation convenience, avoids the multi -step operation tediousness of traditional structure. The coordinated action of guide mechanism and rotating component enhances the stability of side wing movement track, prevents the jamming phenomenon in the adjustment process.

Description

Technical Field

[0001] This utility model belongs to the technical field of child safety protection equipment, specifically relating to a child seat. Background Technology

[0002] With the rapid development of the road transportation industry, cars have become the main means of transportation for families' daily travel, and the safety of children in cars has also received widespread attention from society. Because children's bodies are not yet fully developed, they are extremely vulnerable to accidental injuries in the event of sudden braking, collisions, or other unexpected situations while the vehicle is in motion. Therefore, the importance of child safety seats as key equipment to ensure children's safety in cars is self-evident.

[0003] Currently, most child safety seats on the market have side wings on both sides of the seat body. These wings are designed to wrap around and protect the child's body from the sides, reducing lateral displacement during a collision and thus lowering the risk of injury. However, most existing safety seat side wings are fixed or only allow for simple manual adjustment of one side wing at a time.

[0004] Fixed side wings cannot be adaptively adjusted according to a child's size, age, and different usage scenarios. For smaller children, they may not provide an effective and snug fit, significantly reducing protective effectiveness. For larger children, the narrow spacing between the side wings may cause a feeling of constriction, affecting riding comfort. Structures that only allow adjustment of one side wing are not only cumbersome to operate but also struggle to ensure the synchronicity and symmetry of adjustments on both sides. Inconsistent adjustments can lead to uneven force on the child's body, potentially causing additional injury in emergencies. Furthermore, they cannot accurately provide balanced protection for both sides of the child's body.

[0005] Furthermore, some adjustable side wings exhibit poor stability and guidance during adjustment, easily leading to jamming or misalignment, affecting the smoothness of adjustment and the reliability of use. Moreover, the overall structural strength of existing car seats has room for improvement; in the event of a strong collision, the seat's resistance to deformation is insufficient, potentially weakening its protective effect on children.

[0006] Given the shortcomings of existing child safety seats in terms of side wing adjustment, protective effect, structural stability, and overall strength, developing a safety seat that can achieve synchronous opposite-direction rotation adjustment of both side wings, is convenient and stable to adjust, and has high overall structural strength has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0007] This utility model provides a child seat to solve at least one of the above-mentioned technical problems.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A child seat includes a seat body and side wings symmetrically arranged on both sides of the seat body. The lower ends of the side wings are rotatably connected to the side wall of the seat body via a rotating assembly. The seat body is provided with a drive assembly for driving the two side wings to rotate synchronously in opposite directions.

[0010] Furthermore, this application also proposes that the drive assembly includes mounting seats symmetrically fixed on both sides of the seat body, and a rotating shaft rotatably connected to the seat body. A threaded bushing is fixedly connected to the mounting seat, and threaded sleeves that are threadedly engaged with the threaded bushings are slidably connected to both ends of the rotating shaft. The outer end of the threaded sleeve is provided with a connecting part for connecting to the side wings, and the outer side of the side wings is provided with a drive part for driving the rotating shaft to rotate forward and backward.

[0011] Furthermore, this application also proposes that both ends of the rotating shaft are fixedly connected with cross-shaped limiting pins, the threaded sleeve has an axially arranged cross-shaped sliding groove, and the cross-shaped limiting pins are slidably connected to the cross-shaped sliding groove.

[0012] Furthermore, this application also proposes that the drive unit includes a rotating shaft that passes through the side wing and is rotatably connected to the side wing, a handle is fixedly connected to one end of the rotating shaft located on the outer side of the side wing, a first pulley is fixedly connected to one end of the rotating shaft located on the inner side of the side wing, a second pulley is fixedly connected to the outer end of the threaded sleeve, and a transmission belt is connected between the first pulley and the second pulley.

[0013] Furthermore, this application also proposes that the connecting part includes a nut, the side of the wing is provided with a connecting hole, the nut passes through the connecting hole and is threadedly connected to the outer end of the second pulley, and the end face of the nut cooperates with the end face of the second pulley to achieve clamping and fixing of the side wing.

[0014] Furthermore, this application also proposes that the length of the second pulley is not less than the linear distance of the rotation of the connecting hole on the side wing, so as to provide sufficient displacement space for the transmission belt.

[0015] Furthermore, this application also proposes that the rotating assembly includes a rotating seat disposed at the lower end of the side wing, and the lower end of the seat body is provided with a mounting hole that matches the position of the rotating seat, and the rotating seat and the mounting hole are connected by a rotating connecting shaft.

[0016] Furthermore, this application also proposes that the side wall of the seat body is symmetrically provided with guide seats, the guide seats are provided with guide grooves, and the side wings are provided with sliding parts that slide in cooperation with the guide grooves.

[0017] Furthermore, this application also proposes that the guide seat and the mounting seat both extend outward along the outer side of the seat body to form a U-shaped groove between them, and the sidewall of the side wing is provided with an outwardly extending flange that slides in cooperation with the U-shaped groove.

[0018] Furthermore, this application also proposes that a metal frame be provided along the extension surface of the seat body.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0020] 1. This solution utilizes an adjustable mechanical linkage structure to ensure real-time synchronous movement on both sides, achieving precise control of the wrapping degree and accurate synchronous adjustment of the distance between the side wings, ensuring balanced force distribution on both sides of the child's body. The dynamic wrapping function of the side wings effectively adapts to the protection needs of children of different body sizes, reducing lateral displacement during collisions. The mechanical linkage system enhances ease of operation, avoiding the cumbersome multi-step operation of traditional structures. The synergistic effect of the guide mechanism and rotating components enhances the stability of the side wing movement trajectory, preventing jamming during adjustment.

[0021] 2. This solution uses a single rotating shaft to drive the synchronous movement of the threaded sleeves on both sides, eliminating the time and displacement differences in adjustment between the two sides. A single rotation of the shaft achieves equidistant displacement of the side wings. The threaded transmission mechanism precisely converts rotational motion into linear displacement, offering higher position retention compared to a rack and pinion structure. This prevents accidental displacement of the side wings under impact, achieving synchronous and symmetrical adjustment of both side wings, ensuring even force distribution on both sides of the child's body, and preventing protective failure due to asynchronous adjustment. The self-locking characteristic of the threaded transmission mechanism effectively maintains the adjusted side wing position, preventing accidental loosening of the side wings during vehicle bumps or collisions. The sliding connection structure between the rotating shaft and the threaded sleeves simplifies the transmission path, reduces mechanism complexity, and improves the reliability and durability of the adjustment operation.

[0022] 3. The cross-shaped limiting structure of this application forms a stable guide through four-way contact surfaces, effectively eliminating the fit gap, while increasing the contact area to distribute the load, significantly improving the stability and durability of the adjustment process. It solves the problems of poor synchronization and easy jamming caused by insufficient fit between the pivot and the sleeve in the existing car seat side wing adjustment process, ensuring that the two side wings always maintain synchronous and symmetrical movement during adjustment, avoiding pressure on the child's body due to unilateral deviation, while enhancing the wear resistance of the adjustment mechanism and extending its service life.

[0023] 4. This solution uses a single handle to drive the synchronous movement of the two transmission belts, avoiding human error. Furthermore, existing technologies using gear transmissions are prone to jamming, while this solution uses belt transmission to reduce mechanical friction and noise, improving adjustment smoothness. It achieves synchronous symmetrical adjustment of both side wings with a single handle, solving the problem of uneven force distribution caused by manual unilateral adjustment in existing technologies. At the same time, the belt transmission structure simplifies mechanical complexity and improves operational stability and reliability.

[0024] 5. This solution effectively solves the displacement compensation problem of the transmission belt during dynamic adjustment by establishing a correlation between the length of the second pulley and the rotation line distance of the connecting hole. It can ensure that the transmission belt is always in a stable transmission state during the synchronous adjustment of the side wing, avoid adjustment failure caused by belt slippage or slippage, thereby improving the reliability and smoothness of side wing adjustment, and reducing the risk of failure caused by abnormal wear of the transmission system.

[0025] 6. This solution achieves quick assembly and disassembly of the side wings and adjustable clamping force through the threaded engagement of the nut and the second pulley. While ensuring connection strength, it facilitates the maintenance and replacement of the side wings, solving the technical problems of poor connection stability and low assembly and disassembly efficiency between the side wings and transmission components. The threaded clamping structure ensures reliable fixation between the side wings and transmission components, avoiding side wing offset caused by loose connection during transmission. At the same time, it simplifies the assembly process and improves the maintainability of the child safety seat.

[0026] 7. This solution significantly improves the centering of the rotating assembly through the matching positioning of the rotating base and mounting holes, as well as the through-type design of the rotating connecting shaft. This ensures that the side wings maintain axial alignment throughout the synchronous adjustment process, avoiding frictional wear or jamming caused by deflection. It solves the problems of easy misalignment and poor stability in existing car seat side wing rotating structures, achieving precise guidance and reliable support for the side wings during synchronous adjustment, ensuring the stability of the side wing rotation trajectory, thereby improving the uniformity of the child's body wrapping and the protective effect. At the same time, the modular design of the rotating base and mounting holes simplifies the assembly process and reduces manufacturing costs.

[0027] 8. This solution creates a double constraint by incorporating a guide seat with guide grooves in the seat body and sliding parts in the side wings. This not only enhances the stability of the side wing movement but also ensures the symmetrical movement accuracy of both side wings through a linear guiding mechanism, completely resolving the technical defects of asynchronous and easily offset side wing adjustments in existing technologies. It achieves precise control of the movement trajectory during side wing adjustment, effectively eliminating lateral displacement errors during side wing rotation and ensuring that both side wings always move synchronously in a symmetrical manner. This structure significantly improves the stability and reliability of side wing adjustment, maintaining the geometric integrity of the side wing structure during vehicle bumps or sudden collisions, avoiding the risk of protective failure due to structural deformation.

[0028] 9. This solution uses the combination of U-shaped grooves and flanges to form a three-sided sliding limit, which simultaneously constrains lateral displacement and rotational freedom during side wing adjustment, ensuring that the side wings can only move smoothly along a preset trajectory. This solves the problem of jamming caused by insufficient guidance during the adjustment of existing car seat side wings, improves the stability and synchronicity of side wing movement, and ensures that the two side wings always maintain a symmetrical trajectory during opposite rotation, thereby improving the uniformity of the child's body wrapping and the reliability of protection. Attached Figure Description

[0029] Figure 1 This is one of the structural schematic diagrams of a specific embodiment of the present utility model;

[0030] Figure 2 This is the second structural schematic diagram of a specific embodiment of the present utility model;

[0031] Figure 3 This is a front view of a specific embodiment of the present utility model;

[0032] Figure 4 This is one of the structural schematic diagrams of the main body of the seat of this utility model;

[0033] Figure 5 This is the second structural schematic diagram of the main body of the seat of this utility model;

[0034] Figure 6 This is one of the structural schematic diagrams of the assembly of the side wing and drive assembly of this utility model;

[0035] Figure 7 This is the second structural schematic diagram of the assembly of the side wing and drive assembly of this utility model;

[0036] Figure 8 This is a schematic diagram of the assembly structure of the rotating shaft, threaded sleeve, and second pulley in this utility model;

[0037] Figure 9 This is a cross-sectional view of the assembly structure of the rotating shaft, threaded sleeve, and second pulley in this utility model;

[0038] Figure 10 This utility model Figure 9 Enlarged view of section A in the middle.

[0039] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0040] In the attached diagram:

[0041] 1. Seat body; 11. Mounting seat; 111. Threaded bushing; 12. Mounting hole; 13. Guide seat; 131. Guide groove; 14. U-shaped slide groove; 15. Metal frame; 2. Side wing; 21. Rotating seat; 22. Sliding part; 23. Flange; 3. First pulley; 31. Handle; 4. Rotating shaft; 401. Cross limit pin; 41. Second pulley; 42. Threaded sleeve; 421. Cross slide groove; 43. Nut; 5. Drive belt. Detailed Implementation

[0042] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0044] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] In existing technologies, the side wing 2 structures of child safety seats are mostly fixed or single-sided independently adjustable designs, which are difficult to adapt to the protection needs of children of different sizes. Fixed side wing 2 cannot adjust the wrapping, resulting in gaps in protection for smaller children and a feeling of pressure for larger children. Single-sided adjustable structures are cumbersome to operate and have poor synchronization, and uneven force on both sides may cause secondary injury risks. During vehicle movement, in the event of a side collision, traditional side wing 2 structures, lacking a synchronized adjustment mechanism, are unable to achieve a dynamic fit to the child's body curves for protection.

[0048] To address the aforementioned issues, researchers discovered that the lack of a synchronized adjustment mechanism for wing 2 was the core factor leading to poor protective performance. By analyzing the symmetrical characteristics of a child's body, they realized that bilateral linkage adjustment could ensure balanced force distribution. Based on the principles of mechanical transmission, they explored how to achieve symmetrical movement on both sides using a single drive source. Further considering the structural stability of the rotation connection point, it was necessary to prevent wing 2 from shifting while ensuring freedom of movement.

[0049] Therefore, this application proposes a child seat, referring to Figures 1 to 10 The seat includes a main body 1 and side wings 2 symmetrically arranged on both sides of the main body 1. The lower end of the side wings 2 is rotatably connected to the side wall of the main body 1 through a rotating assembly. The main body 1 is provided with a drive assembly for driving the side wings 2 to rotate synchronously in opposite directions.

[0050] The seat body 1 is the basic support structure that bears the weight of the child. The side wings 2 are protective structures located on both sides of the seat body 1, which can be constructed using curved plates combined with energy-absorbing material layers. Their rotation trajectory is calculated based on ergonomics. The rotation component is the mechanical connection device that enables the rotational movement of the side wings 2. Specifically, it can use a hinge mechanism or a bearing-equipped shaft 4 structure to ensure that the side wings 2 rotate around a predetermined axis. The drive component refers to the power transmission system that controls the synchronous movement of the two side wings 2, achieving bidirectional symmetrical adjustment through mechanical linkage.

[0051] Specifically, when the drive assembly is operated, power is simultaneously applied to both side wings 2 via the transmission mechanism. The rotating assembly provides a stable pivot point for the side wings 2, ensuring that the side wings 2 move along a predetermined trajectory. Under the action of the drive assembly, the two side wings 2 rotate in opposite directions, forming a symmetrical contraction or expansion action. This synchronized movement mode can precisely control the spacing between the side wings 2, allowing the protective structure to dynamically conform to the child's body contours. The cooperation between the guide mechanism and the rotating assembly can eliminate lateral offset during the movement of the side wings 2, maintaining the stability of the adjustment trajectory.

[0052] Compared to existing technologies, traditional unilateral adjustment requires separate operation of the mechanisms on both sides. This solution achieves synchronous movement on both sides through a single drive source, eliminating human error. Existing fixed side wings cannot dynamically adapt to changes in body shape; this solution achieves precise control of the wrapping degree through an adjustable structure. Traditional independent adjustment mechanisms suffer from response delays; this solution's mechanical linkage system ensures real-time synchronization of movement on both sides.

[0053] Through the above technical solution, this application achieves precise and synchronous adjustment of the spacing between the two side wings 2, ensuring balanced force on both sides of the child's body. The dynamic wrapping function of the side wings 2 effectively adapts to the protection needs of children of different body sizes, reducing lateral displacement during collisions. The mechanical linkage system improves ease of operation, avoiding the cumbersome multi-step operation of traditional structures. The synergistic effect of the guide mechanism and the rotating component enhances the stability of the movement trajectory of the side wings 2, preventing jamming during adjustment.

[0054] As one specific implementation of the driver component in this application, refer to Figures 1-10 The drive assembly includes mounting seats 11 symmetrically fixed on both sides of the seat body 1, and a rotating shaft 4 rotatably connected to the seat body 1. Threaded bushings 111 are fixedly connected to the mounting seats 11. Threaded sleeves 42 that are threadedly engaged with the threaded bushings 111 are slidably connected to both ends of the rotating shaft 4. The outer end of the threaded sleeve 42 is provided with a connecting part for connecting to the side wings 2. The outer side of the side wings 2 is provided with a drive part for driving the rotating shaft 4 to rotate forward and backward.

[0055] The mounting base 11 is a support structure fixed to both sides of the seat body 1, used to support and position the threaded bushing 111. The threaded bushing 111 is a sleeve structure with internal threads, specifically made of copper alloy material, which converts the rotational motion of the rotating shaft 4 into linear motion through threaded engagement with the threaded sleeve 42. The rotating shaft 4 is a rotating component arranged along the width direction of the seat body 1, used to transmit the rotational power of the drive unit. The threaded sleeve 42 is a tubular component with external threads, whose inner hole slides with the rotating shaft 4 to achieve axial movement. The connecting part is a mechanical interface located at the outer end of the threaded sleeve 42, which forms a detachable connection with the side wing 2 through bolts or clips. The drive unit is a power input device located on the outside of the side wing 2, specifically a manual crank or electric motor, used to control the forward and reverse rotation direction of the rotating shaft 4.

[0056] Specifically, when the drive unit drives the rotating shaft 4 to rotate in the forward direction, the threaded sleeve 42 slides axially along the rotating shaft 4 under the constraint of the cross-shaped limiting pin 401. Due to the threaded engagement between the threaded sleeve 42 and the threaded bushing 111, both threaded sleeves 42 move simultaneously towards the center of the seat body 1, thereby pulling the two side wings 2 to rotate synchronously in opposite directions through the connecting part. When the rotating shaft 4 rotates in the reverse direction, the threaded sleeve 42 moves outward, causing the side wings 2 to unfold in the opposite direction. The sliding connection between the rotating shaft 4 and the threaded sleeve 42 allows the threaded sleeve 42 to maintain axial movement freedom during rotation, while the engagement between the cross-shaped limiting pin 401 and the cross-shaped sliding groove 421 transmits torque and restricts circumferential rotation, ensuring that the threaded sleeve 42 only moves axially along the rotating shaft 4.

[0057] This design uses a single rotating shaft 4 to drive the synchronous movement of the threaded sleeves 42 on both sides, eliminating the time and displacement differences in adjustment between the two sides. A single rotation of the shaft 4 achieves equidistant displacement of the side wings 2 on both sides. The threaded transmission mechanism precisely converts rotational motion into linear displacement, offering higher position retention compared to a rack and pinion structure. This prevents accidental displacement of the side wings 2 under impact, achieving synchronous and symmetrical adjustment of the side wings 2, ensuring even force distribution on both sides of the child's body, and preventing protective failure due to asynchronous adjustment. The self-locking characteristic of the threaded transmission mechanism effectively maintains the adjusted position of the side wings 2, preventing accidental loosening during vehicle bumps or collisions. The sliding connection structure between the rotating shaft 4 and the threaded sleeves 42 simplifies the transmission path, reduces mechanism complexity, and improves the reliability and durability of the adjustment operation.

[0058] It should be noted that, as Figures 8-10 As shown, both ends of the rotating shaft 4 are fixedly connected with cross limit pins 401, and the threaded sleeve 42 has an axially arranged cross slide groove 421. The cross limit pins 401 and the cross slide groove 421 are slidably connected.

[0059] The cross-shaped limiting pin 401 is a protruding structure with a cross-shaped cross section located at the end of the rotating shaft 4. It can be achieved by welding or integrally molding a cross-shaped metal part at the end of the rotating shaft 4, and is used to limit the relative rotation between the threaded sleeve 42 and the rotating shaft 4. The cross-shaped groove 421 is a cross-shaped groove opened along the axial direction of the threaded sleeve 42. It can be manufactured by machining or injection molding, and is used to form a sliding fit with the cross-shaped limiting pin 401, allowing the threaded sleeve 42 to move axially along the rotating shaft 4 while forcibly maintaining the synchronous rotation of both.

[0060] The rotating shaft 4 is embedded in the cross groove 421 of the threaded sleeve 42 by cross-shaped limiting pins 401 at both ends. When the rotating shaft 4 is driven to rotate, the engagement of the cross-shaped limiting pins 401 and the cross groove 421 forces the threaded sleeve 42 to rotate synchronously. Since the threaded sleeve 42 is threadedly engaged with the threaded bushing 111, the threaded sleeve 42 moves axially along the rotating shaft 4 during rotation, thereby driving the side wing 2 to pivot around the rotating assembly. During this process, the sliding engagement of the cross-shaped limiting pins 401 and the cross groove 421 ensures torque transmission between the rotating shaft 4 and the threaded sleeve 42, while also allowing the threaded sleeve 42 to slide freely axially, avoiding adjustment deviations of the side wing 2 caused by asynchronous rotation.

[0061] The cross-shaped limiting structure of this application forms a stable guide through four-way contact surfaces, effectively eliminating the fit gap. At the same time, it increases the contact area to distribute the load, significantly improving the stability and durability of the adjustment process. It solves the problem of poor synchronization and easy jamming caused by insufficient fit between the pivot 4 and the sleeve during the adjustment of the side wings 2 of the existing car seat. It ensures that the two side wings 2 always maintain synchronous and symmetrical movement during adjustment, avoiding pressure on the child's body due to unilateral deviation. At the same time, it enhances the wear resistance of the adjustment mechanism and extends its service life.

[0062] As a preferred embodiment of the drive unit in the above embodiments, refer to Figures 1-7 The drive unit includes a rotating shaft that passes through the side wing 2 and is rotatably connected to the side wing 2. A handle 31 is fixedly connected to one end of the rotating shaft located on the outside of the side wing 2. A first pulley 3 is fixedly connected to one end of the rotating shaft located on the inside of the side wing 2. A second pulley 41 is fixedly connected to the outer end of the threaded sleeve 42. A transmission belt 5 is connected between the first pulley 3 and the second pulley 41.

[0063] The rotating shaft is the shaft used to transmit rotational power. It can be a hollow or solid metal shaft, with both ends fixedly connected to the handle 31 and the first pulley 3, respectively, to transmit the rotational motion of the handle 31 to the first pulley 3. The first pulley 3 acts as the driving pulley, transmitting rotational power to the second pulley 41 via the transmission belt 5. The second pulley 41 is the driven pulley connected to the threaded sleeve 42. The transmission belt 5 is a flexible transmission component connecting the first pulley 3 and the second pulley 41, ensuring the synchronicity and stability of power transmission.

[0064] Specifically, when the handle 31 is rotated, the rotating shaft drives the first pulley 3 to rotate synchronously, and the transmission belt 5 transmits power to the second pulley 41. The second pulley 41 drives the threaded sleeve 42 to rotate around the rotating shaft 4. Since the threaded sleeve 42 is threadedly engaged with the threaded bushing 111, the threaded sleeve 42 moves axially along the rotating shaft 4 during rotation, thereby pushing the side wings 2 to rotate around the rotating assembly. The transmission belts 5 on both sides achieve synchronous counter-rotation of the second pulleys 41 on both sides through synchronous belt transmission, ensuring that the side wings 2 on both sides move symmetrically towards or away from each other.

[0065] This solution uses a single handle 31 to drive the synchronous movement of the two transmission belts 5, avoiding errors caused by manual operation. Furthermore, existing technologies using gear transmissions are prone to jamming, while this solution uses belt transmission to reduce mechanical friction and noise, improving the smoothness of adjustment. It achieves symmetrical adjustment of the two side wings 2 synchronously driven by a single handle 31, solving the problem of uneven force distribution caused by manual unilateral adjustment in existing technologies. At the same time, the belt transmission structure simplifies mechanical complexity and improves operational stability and reliability.

[0066] Preferably, the length of the second pulley 41 is not less than the linear distance of the rotation of the connecting hole on the side wing 2, so as to provide sufficient displacement space for the transmission belt 5.

[0067] When the side wing 2 is adjusted by opening and closing around the rotating assembly, the connecting hole generates a circular motion trajectory as the side wing 2 rotates. The axial length of the second pulley 41 is set to be at least equal to the linear distance of this trajectory, so that the transmission belt 5 always slides smoothly along the axial surface of the second pulley 41 during the rotation of the side wing 2. This design prevents the transmission belt 5 from being overstretched or slack due to insufficient displacement space when the side wing 2 is adjusted, thereby maintaining the stability and synchronization of the transmission system.

[0068] This solution establishes a correlation between the length of the second pulley 41 and the rotation line distance of the connecting hole, effectively solving the displacement compensation problem of the transmission belt 5 during dynamic adjustment. It ensures that the transmission belt 5 remains in a stable transmission state during the synchronous adjustment of the side wing 2, avoiding adjustment failures caused by belt slippage or slippage. This improves the reliability and smoothness of the side wing 2 adjustment, while reducing the risk of transmission system failures caused by abnormal wear.

[0069] As a preferred embodiment of the connecting part in this application, refer to Figures 7-10 The connecting part includes a nut 43. The side of the wing 2 is provided with a connecting hole. The nut 43 passes through the connecting hole and is threaded to the outer end of the second pulley 41. The end face of the nut 43 cooperates with the end face of the second pulley 41 to achieve clamping and fixing of the side wing 2.

[0070] Specifically, the nut 43 can be a hexagonal nut 43, and the connecting hole is a through hole located on the side of the side wing 2, which can be a circular hole or an irregularly shaped hole, used to accommodate the nut 43 and restrict its radial displacement. The side wing 2 is sleeved on the outer end of the second pulley 41 through the connecting hole. The nut 43 is screwed into the threaded section of the outer end of the second pulley 41. When the nut 43 is tightened, its end face and the end face of the second pulley 41 jointly apply a clamping force to the edge of the connecting hole of the side wing 2, so that the side wing 2 and the second pulley 41 form a rigid connection. During this process, the thread insertion depth of the nut 43 can be adjusted to adapt to the structure of the side wing 2 with different thicknesses. When the transmission belt 5 drives the second pulley 41 to rotate, the side wing 2 moves synchronously with the second pulley 41 through this clamping and fixing structure, ensuring that the rotation angles of the two side wings 2 are consistent.

[0071] This solution achieves quick assembly and disassembly of the side wing 2 and adjustable clamping force through the threaded engagement of nut 43 and second pulley 41. While ensuring connection strength, it facilitates the maintenance and replacement of the side wing 2, solves the technical problems of poor connection stability and low assembly and disassembly efficiency between the side wing 2 and the transmission components. The threaded clamping structure achieves reliable fixation between the side wing 2 and the transmission components, avoiding the side wing 2 from shifting due to loose connection during transmission. At the same time, it simplifies the assembly process and improves the maintainability of the safety seat.

[0072] As a preferred embodiment of the rotating assembly, the rotating assembly includes a rotating seat 21 disposed at the lower end of the side wing 2, and a mounting hole 12 at the lower end of the seat body 1 that matches the position of the rotating seat 21. The rotating seat 21 and the mounting hole 12 are connected by a rotating connecting shaft.

[0073] After the rotating seat 21 at the lower end of the side wing 2 aligns with the mounting hole 12 at the lower end of the seat body 1, a pivotal connection is formed between them via a rotating connecting shaft. When the drive assembly drives the side wing 2 to rotate synchronously, the rotating seat 21 rotates around the rotating connecting shaft. The mounting hole 12 provides radial constraint for the rotating seat 21, ensuring that the side wing 2 moves only along a predetermined rotation trajectory. The clearance between the rotating connecting shaft and the rotating seat 21, and the mounting hole 12, can be set to a micrometer-level tolerance, for example, by using an interference fit or adding a lubricating layer, or by adding bearings to reduce frictional resistance and improve rotational stability.

[0074] This solution significantly improves the centering of the rotating assembly through the matching positioning of the rotating base 21 and the mounting hole 12, as well as the through-type design of the rotating connecting shaft. This ensures that the side wings 2 maintain axial alignment during synchronous adjustment, avoiding frictional wear or jamming caused by deflection. It solves the problems of easy misalignment and poor stability in the existing side wing 2 rotating structure of car seats, achieving precise guidance and reliable support for the side wings 2 during synchronous adjustment, ensuring the stability of the side wing 2's rotation trajectory, thereby improving the uniformity of the child's body wrapping and the protective effect. At the same time, the modular design of the rotating base 21 and the mounting hole 12 simplifies the assembly process and reduces manufacturing costs.

[0075] As a preferred embodiment of this application, refer to Figures 1-6 The seat body 1 has guide seats 13 symmetrically arranged on the side wall, the guide seats 13 are provided with guide grooves 131, and the side wings 2 are provided with sliding parts 22 that slide in cooperation with the guide grooves 131.

[0076] The guide seat 13 is a support structure fixed to both sides of the seat body 1, and its function is to provide stable track support for the linear movement of the side wings 2. The guide groove 131 is a long strip-shaped groove extending along the length of the guide seat 13, and its function is to ensure the consistency of the movement direction of the side wings 2 by constraining the movement trajectory of the sliding part 22. The sliding part 22 is a protruding structure provided on the side of the side wing 2, which can be implemented by using a slider or roller that matches the cross-sectional shape of the guide groove 131, and its function is to form a stable linear guiding mechanism through sliding cooperation with the guide groove 131.

[0077] When the drive assembly drives the two side wings 2 to rotate in opposite directions, the sliding part 22 of the side wing 2 slides linearly along the guide groove 131 of the guide seat 13. The extending direction of the guide groove 131 is consistent with the tangential direction of the rotation trajectory of the side wing 2, so that the sliding part 22 can precisely constrain the rotation angle of the side wing 2 when it moves in the groove. For example, during the outward unfolding of the side wing 2, the sliding part 22 slides from the rear end to the front end of the guide groove 131. At this time, the side wall of the guide groove 131 continuously applies a radial constraint force to the sliding part 22, effectively preventing the side wing 2 from shifting laterally during rotation.

[0078] This solution forms a double constraint by setting a guide seat 13 with a guide groove 131 on the seat body 1 and setting a sliding part 22 on the side wing 2. This not only enhances the stability of the movement of the side wing 2, but also ensures the symmetrical movement accuracy of the two side wings 2 through a linear guidance mechanism, thus completely solving the technical defects of asynchronous adjustment and easy deviation of the side wings 2 in the prior art.

[0079] This application achieves precise control of the motion trajectory during the adjustment of the side wing 2, effectively eliminating lateral displacement errors during the rotation of the side wing 2 and ensuring that both side wings 2 always move synchronously in a symmetrical manner. This structure significantly improves the stability and reliability of the side wing 2 adjustment, maintaining the geometric integrity of the side wing 2 structure during vehicle bumps or sudden collisions, and avoiding the risk of protective failure due to structural deformation.

[0080] Furthermore, both the guide seat 13 and the mounting seat 11 extend outward along the outer side of the seat body 1 to form a U-shaped groove 14 between them, and the side wall of the side wing 2 is provided with an outwardly extending flange 23 that slides in cooperation with the U-shaped groove 14.

[0081] The guide seat 13 and the mounting seat 11 form a continuous U-shaped groove 14 structure on the outer side of the seat body 1, and the flange 23 of the sidewall of the side wing 2 is embedded in the groove. When the drive assembly drives the side wing 2 to rotate in opposite directions, the flange 23 slides along the trajectory of the U-shaped groove 14, and its direction of movement is restricted by the inner wall of the groove, preventing the side wing 2 from shifting laterally or tilting during adjustment. At the same time, the continuous structure of the U-shaped groove 14 ensures that the flange 23 always maintains surface contact with the groove during sliding, reducing local stress concentration.

[0082] This solution uses the cooperation of U-shaped groove 14 and flange 23 to form a three-sided sliding limit, which simultaneously constrains the lateral displacement and rotational freedom during the adjustment of side wing 2, so that side wing 2 can only move smoothly along the preset trajectory. This solves the problem of jamming caused by insufficient guidance when adjusting the side wing 2 of existing car seats, improves the stability and synchronicity of the movement of side wing 2, and ensures that the two side wings 2 always maintain a symmetrical trajectory during the opposite rotation, thereby improving the uniformity of the child's body wrapping and the reliability of protection.

[0083] As a preferred embodiment of the seat body 1, refer to Figure 1 , Figure 3 as well as Figure 4 A metal frame 15 is provided along the extension surface of the seat body 1. The metal frame 15 refers to the structural support frame embedded inside the seat body 1. Specifically, it can be made of high-strength steel or aluminum alloy and connected by welding or bolting. It is arranged along the main stress areas of the seat body 1 to improve the deformation resistance of the seat body 1 under collision impact.

[0084] The metal frame 15 is configured as a continuous support structure extending longitudinally along the seat body 1. Its cross-sectional shape can be designed as an I-beam or a box shape to optimize mechanical performance. During the injection molding process of the seat body 1, the metal frame 15 is pre-embedded inside a plastic or composite material shell, forming an integrated composite structure through the injection molding material. When a vehicle collision occurs, the metal frame 15 can effectively absorb and disperse impact energy from different directions, preventing the failure of the side wing 2 connection structure due to plastic deformation of the seat body 1, while maintaining the relative positional accuracy of the side wing 2 drive assembly and rotating assembly, ensuring the stability of the side wing 2 adjustment function.

[0085] This solution forms a composite load-bearing system through an internal metal frame 15, which improves the overall structural strength to a level that can withstand higher energy impacts without increasing the thickness of the seat body 1. At the same time, it maintains the movement precision of the side wing 2 adjustment mechanism, solving the problem of side wing 2 protection failure caused by insufficient structural strength of the traditional car seat body 1. The continuous support characteristics of the metal frame 15 enable the seat body 1 to maintain geometric stability during a collision, ensuring that the side wings 2 continue to effectively protect the child's body and reduce the risk of secondary injury caused by deformation of the main structure.

[0086] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0087] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0088] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A child car seat, characterized in that, It includes a seat body (1) and side wings (2) symmetrically arranged on both sides of the seat body (1). The lower end of the side wings (2) is rotatably connected to the side wall of the seat body (1) through a rotating component. The seat body (1) is provided with a driving component for driving the two side wings (2) to rotate synchronously in opposite directions.

2. A child car seat according to claim 1, characterized in that, The drive assembly includes mounting seats (11) symmetrically fixed on both sides of the seat body (1) and a rotating shaft (4) rotatably connected to the seat body (1). A threaded bushing (111) is fixedly connected to the mounting seat (11). Threaded sleeves (42) that are threadedly engaged with the threaded bushings (111) are slidably connected to both ends of the rotating shaft (4). The outer end of the threaded sleeve (42) is provided with a connecting part for connecting the side wing (2). The outer side of the side wing (2) is provided with a drive part for driving the rotating shaft (4) to rotate forward and backward.

3. A child car seat according to claim 2, characterized in that, Both ends of the rotating shaft (4) are fixedly connected with cross limit pins (401), and the threaded sleeve (42) has an axially arranged cross slide groove (421). The cross limit pins (401) are slidably connected to the cross slide groove (421).

4. A child car seat according to claim 2, characterized in that, The drive unit includes a rotating shaft that passes through the side wing (2) and is rotatably connected to the side wing (2). A handle (31) is fixedly connected to one end of the rotating shaft located on the outside of the side wing (2). A first pulley (3) is fixedly connected to one end of the rotating shaft located on the inside of the side wing (2). A second pulley (41) is fixedly connected to the outer end of the threaded sleeve (42). A transmission belt (5) is connected between the first pulley (3) and the second pulley (41).

5. A child seat according to claim 3, characterized in that, The connecting part includes a nut (43), and the side of the wing (2) is provided with a connecting hole. The nut (43) passes through the connecting hole and is threaded to the outer end of the second pulley (41). The end face of the nut (43) cooperates with the end face of the second pulley (41) to achieve clamping and fixing of the side wing (2).

6. A child seat according to claim 5, characterized in that, The length of the second pulley (41) is not less than the linear distance of the rotation of the connecting hole on the side wing (2) so as to provide sufficient displacement space for the transmission belt (5).

7. A child seat according to claim 2, characterized in that, The rotating assembly includes a rotating seat (21) located at the lower end of the side wing (2). The lower end of the seat body (1) is provided with a mounting hole (12) that matches the position of the rotating seat (21). The rotating seat (21) and the mounting hole (12) are connected by a rotating connecting shaft.

8. A child car seat according to claim 1, characterized in that, The seat body (1) has guide seats (13) symmetrically arranged on its side wall. The guide seats (13) have guide grooves (131) and the side wings (2) have sliding parts (22) that slide in cooperation with the guide grooves (131).

9. A child car seat according to claim 8, characterized in that, Both the guide seat (13) and the mounting seat (11) extend outward along the outer side of the seat body (1) to form a U-shaped groove (14) between them. The side wall of the side wing (2) is provided with an outwardly extending flange (23) that slides with the U-shaped groove (14).

10. A child seat according to claim 1, characterized in that, A metal frame (15) is provided along the extension surface of the seat body (1).

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