A child safety seat

Abstract

The present disclosure provides a child safety seat, the pitch angle adjustment of the child safety seat is realized through an angle adjustment mechanism, a connecting rod is connected with a chair frame, a shaft sleeve sleeved on the connecting rod is driven by a motor, gears are installed at both ends of the shaft sleeve, the gears are driven by the shaft sleeve to move on a rack, the rack is installed on a base plate, so that the seat body can be angle-adjusted on the base plate, the connecting rod and the chair frame form a fixed support structure, so that the stability during angle adjustment is better; by setting a protection device on the seat part, the probability of accidentally injuring the child during the rotation of the seat body is reduced, and the use safety is improved; by setting an induction device for detecting that the seat body is a non-empty seat, the protection device is started, and energy consumption is prevented from being wasted by empty seat protection. The child safety seat provided by the present application has the advantages of compact structure, good support, and high use safety.

Description

Technical Field

[0001] This disclosure relates to the field of child safety seat technology, specifically to a child safety seat. Background Technology

[0002] A child car seat is a seat designed specifically for children of different ages, installed in a car, and effectively improves children's safety while traveling. With increasing awareness of vehicle safety, child car seats have become widely used. However, traditional child car seats are fixedly installed in the car. In actual use, the requirements for different ages, body types, sleeping positions, and comfort levels vary, often necessitating adjustments to the seat's tilt angle.

[0003] Currently, there are already some existing technical solutions for automatic adjustment of the tilt angle of child safety seats. For example, the invention patent with publication number CN108128221A discloses a child safety seat and a backrest tilt angle adjustment mechanism, including a base and a seat body. The seat body includes an integral seat and a backrest. The bottom of the seat is provided with an arc-shaped track extending towards the backrest. An arc-shaped fixing frame that can slide within the arc-shaped track is provided. The bottom of the arc-shaped fixing frame is provided with a fixed shaft connected to the base. The tilt angle of the backrest is achieved by moving the position of the arc-shaped fixing frame within the arc-shaped track. Its advantage is that the bottom of the arc-shaped fixing frame is provided with a fixed shaft connected to the base, and the arc-shaped fixing frame is located within the arc-shaped track. The tilt angle of the backrest is achieved by moving the arc-shaped fixing frame within the arc-shaped track, that is, by adjusting the position of the arc-shaped fixing frame on the backrest. The adjustment device in this technical solution is located on the outside of the seat back, which makes the overall structure of the seat less compact and provides poor support. When used in a car, due to the limited space inside the car, the seat can easily pinch a child's limbs when rotated to a certain angle. The safety of the child cannot be guaranteed during the rotation process, which poses a safety problem.

[0004] Based on publicly available technology, current child safety seats with automatic tilt angle adjustment functions have problems such as easy leg pinching, poor safety, and inconvenience in use. Summary of the Invention

[0005] This disclosure addresses the problems of existing child safety seats with automatic tilt angle adjustment, such as easy leg pinching, poor safety, and inconvenience of use, by providing a child safety seat with the advantages of preventing leg pinching, better safety, and ease of use.

[0006] One of the concepts disclosed herein is to provide a child safety seat, specifically including a seat body, the seat body being provided with an angle adjustment device for electrically adjusting the tilt angle of the seat body; the seat body includes a backrest and a seat portion, the angle adjustment device being disposed in the seat portion.

[0007] Furthermore, the angle adjustment device includes a chassis, a drive mechanism, and gears, the chassis being adapted to the seat portion and used to support the seat body; A connecting plate is provided on the chassis, and the seat is slidably connected to the chassis through the connecting plate; the seat is provided with a chair frame, the chair frame includes a connecting rod, the connecting rod is fixedly connected to the chair frame, a limit groove is provided on the connecting plate, and the connecting rod is slidably engaged with the limit groove; a gear is rotatably connected to the connecting rod, the drive mechanism is connected to the gear transmission, a rack is provided on the chassis to engage with the gear, and the drive mechanism drives the gear to make the seat body slide.

[0008] In practical use, pitch angle adjustment is a common function of child safety seats. However, in existing technologies, most child safety seats still rely on manual adjustment, which is laborious, time-consuming, and inconvenient. This technical solution utilizes an angle adjustment device to electrically adjust the pitch angle of the seat body, saving more time and effort compared to manual adjustment. Furthermore, by designing a chassis and drive mechanism, the chassis and seat are fitted together to support the seat body, allowing the seat body to adjust its pitch angle on the chassis via the drive mechanism. The entire angle adjustment device is located in the seat, closer to the center of gravity, resulting in better stability and support during angle adjustment. In this technical solution, the connecting plate is essentially curved and fits the seat body for installation. The sliding connection between the connecting plate and the seat body enhances the structural stability of the entire angle adjustment device. A limiting groove restricts the pitch angle adjustment range of the seat body. A motor drives the connecting rod to slide within the limiting groove, thereby adjusting the seat body's angle. This design is compact and offers better stability.

[0009] On the other hand, in this technical solution, the seat body is supported by the chair frame, and the connecting rod is connected to the drive mechanism. The connecting rod is fixedly connected to the chair frame, and the drive mechanism drives the chair frame, thereby driving the entire seat body. Compared with the existing technology where the connecting rod is set independently, the stability and support are better. In addition, the existing technology has large wear on the rotating structure and low strength of the connecting structure.

[0010] Furthermore, a bushing is installed on the connecting rod, and gears are located at both ends of the bushing. The bushing is connected to a motor; the length of the bushing is less than the length of the connecting rod. By installing gears on the bushing, the rack is mounted on the chassis and driven by the motor, causing the gears to move on the rack. By setting the bushing to rotate on the connecting rod driven by the motor, the connecting rod can be fixedly connected to the seat frame, thus forming a stable support structure, making the child safety seat more stable when adjusting the angle. By setting the length of the bushing to be shorter than the length of the connecting rod, the entire transmission structure is located in the middle of the seat, resulting in better overall structural stability.

[0011] Furthermore, the bushing end is provided with a positioning groove, and the inner wall of the gear is provided with a protrusion. The protrusion cooperates with the positioning groove to limit the gear at both ends of the bushing. A reduction mechanism is provided between the bushing and the motor to increase torque. A motor box is also installed on the bushing for installing the motor. The motor box is provided with a through hole that fits the bushing and is used to fit the motor box onto the bushing.

[0012] In this technical solution, the gears are directly fitted onto both ends of the bushing. Installation is convenient and quick. The bushing rotates under the action of the motor, and the gears at both ends of the bushing also rotate under the corresponding force. The positioning groove at the end of the bushing and the protrusion on the inner wall of the gear prevent slippage on the bushing, improving the overall structural integrity and greatly improving rotational efficiency. In actual use, driving the gear ring to rotate the seat body requires a large torque. This technical solution, by setting a reduction mechanism, such as a gear set, between the bushing and the motor, greatly increases the torque, allowing even a low-power motor to drive the bushing and gear ring. This not only reduces costs but also further reduces the size. The size of a child safety seat needs to consider the vehicle's interior space, especially since child safety seats are fixed in the rear seats, which are narrower. Therefore, the seat back also needs to be thinner. This technical solution, by setting a motor box fitted onto the bushing, allows the motor to be installed in the seat area, avoiding impact on the seat back's volume and greatly improving space utilization.

[0013] This disclosure may also provide a child safety seat, including a seat body, wherein the seat body is provided with an angle adjustment device for electrically adjusting the pitch angle of the seat body.

[0014] Furthermore, the seat body includes a backrest and a seat portion, and the angle adjustment device is disposed in the seat portion; the angle adjustment device includes a chassis, the chassis is adapted to the seat portion, the chassis is used to support the seat body, and the angle adjustment device also includes a drive mechanism, the drive mechanism is used to drive the seat body to move on the chassis by a motor. The seat is equipped with a protective device for preventing leg pinching. The protective device includes a sensor and a controller. The sensor detects that the seat body rotates and pinches the legs, triggering the controller to stop and / or retract the angle adjustment device.

[0015] In real-world use, due to limited interior space, especially in the rear seats after a child safety seat is installed, improper adjustment of the seat's tilt angle can easily trap a child's legs, resulting in low safety. This technical solution addresses this by using a safety device that senses changes in the seat position. When the change reaches a set value, the safety device stops the tilt adjustment or returns it to its original angle.

[0016] Furthermore, a connecting plate is provided on the chassis, the connecting plate passes through the seat body, and the seat body is slidably connected to the connecting plate; the seat body is provided with a chair frame, the chair frame includes a connecting rod, the connecting rod is slidably connected to the connecting plate, and the drive mechanism drives the seat body through the chair frame.

[0017] Furthermore, the connecting plate is provided with a limiting groove, the driving mechanism includes a motor, and the connecting rod slides in the limiting groove through the motor; a bushing is installed on the connecting rod, and gears are provided at both ends of the bushing. The output end of the motor is connected to the gears, and a rack that cooperates with the gears is provided on the chassis. The bushing is connected to the motor, and the motor drives the bushing to make the gears move on the rack.

[0018] Furthermore, the bushing end is provided with a positioning groove, and the inner wall of the gear is provided with a protrusion. The protrusion cooperates with the positioning groove to limit the gear at both ends of the bushing. A reduction mechanism is provided between the bushing and the motor to increase torque. A motor box is also installed on the bushing for installing the motor. The motor box is provided with a through hole that fits the bushing and is used to fit the motor box onto the bushing.

[0019] Furthermore, another aspect of this disclosure is that the seat body is also equipped with a sensing device. This sensing device is used to detect whether the seat body is empty. When the sensing device detects that the seat body is not empty, the protection device is activated. By setting up the sensing device, it is possible to detect whether there is a child on the seat body. When the sensing device detects that the seat body is not empty, the protection device is activated to prevent energy waste from activating when the seat is empty.

[0020] In some embodiments, the protective device is located at the leg rest of the seat body and is triggered by sensing changes in pressure at the leg rest.

[0021] Furthermore, the protection device is a pressure sensor.

[0022] In actual use, one end of the seat body is the headrest, and the other end is the leg rest. When the seat body turns, the child's legs move closer to or further away from the leg rest, and the leg rest feels the pressure change. Especially when adjusting the tilt angle, the larger the tilt angle, the closer the legs are to the leg rest, and the greater the pressure felt by the leg rest. Moreover, the closer the legs are to the adult seat in front, the more likely the seat body will pinch the legs if it continues to turn. The safety device is set at the leg rest. When the pressure reaches the set value, it is triggered and controls the seat body to stop turning, which greatly improves the safety of use.

[0023] And / or, in some embodiments, the protection device is connected to the drive mechanism, and the protection device is used to sense and trigger a change in current of the drive mechanism.

[0024] Furthermore, the protection device is a current sensor.

[0025] In actual use, when a child sits in a car seat, the seat rotates with the seat body. During the rotation, the force felt by the seat body varies, and the force exerted by the drive mechanism on the seat body also varies. At this time, the current of the drive mechanism changes. This technical solution sets up a protection device to sense the change in the current of the drive mechanism. When the current change reaches a set value, the protection device is triggered, and the seat body is controlled to stop turning, thus ensuring the safety of the child.

[0026] This disclosure provides a child safety seat that allows for tilt angle adjustment via an angle adjustment mechanism. A connecting rod is connected to a drive mechanism, and a motor drives a bushing mounted on the connecting rod. Gears are installed at both ends of the bushing, and the gears move on a rack driven by the bushing. The rack is mounted on a chassis, allowing the seat body to be angled on the chassis. The connecting rod and the seat frame form a fixed support structure, improving stability during angle adjustment. A protective device is installed in the seat to reduce the probability of accidental injury to a child during seat rotation, improving safety. A sensor is used to detect when the seat is not empty before activating the protective device, preventing wasted energy during empty seat protection. The child safety seat provided in this application has the advantages of compact structure, good support, and high safety. Attached Figure Description

[0027] The present disclosure will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn for the purpose of explaining the preferred embodiments only and should therefore not be construed as limiting the scope of the present disclosure. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0028] Figure 1: An exploded view of a child safety seat provided in this disclosure; Figure 2 : A schematic diagram of the chassis structure in this disclosure; Figure 3 : A partial structural schematic diagram of the drive mechanism in this disclosure; Figure 4 : A partial structural schematic diagram of Embodiment 2 in this disclosure; Figure 5 : A schematic diagram of the toothed ring structure in this disclosure; Figure 6 This disclosure provides a structural schematic diagram of a child safety seat; Figure 7 : A structural schematic diagram of the seat body in this disclosure.

[0029] The components include: 1. Seat body; 2. Base; 3. Backrest; 4. Seat section; 5. Chassis; 6. Connecting plate; 7. Limiting groove; 8. Connecting rod; 9. Seat frame; 10. Gear; 11. Rack; 12. Bushing; 13. Positioning groove; 14. Protrusion; 15. Motor box; 16. Reduction mechanism; 17. Sensing device; 18. Protective device; and 19. Leg rest. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1 to 7 This disclosure will be explained in detail.

[0031] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this disclosure.

[0032] Example 1 like Figure 1 As shown, this embodiment provides a child safety seat, specifically including a seat body 1 and a base 2. The seat body 1 is mounted on the base 2, and the base 2 is used to fix the child safety seat in the vehicle. The seat body 1 includes a backrest 3 and a seat portion 4. The seat portion 4 is provided with an angle adjustment device, which includes a chassis 5 and a drive mechanism. The chassis 5 is disc-shaped and is adapted to the bottom of the seat portion 4 to support the seat body 1. The center of gravity of the seat body 1 rests on the chassis 5. The disc-shaped chassis 5 is installed between the seat body 1 and the base 2. The seat body 1 can automatically adjust its pitch angle on the chassis 5 through the drive mechanism. The entire angle adjustment device is located in the seat portion 4, which is closer to the center of gravity of the seat body 1, resulting in better rotational stability of the seat body 1.

[0033] Furthermore, two connecting plates 6 are symmetrically arranged on the chassis 5. The connecting plates 6 are basically arc-shaped and adapt to the shape of the seat body 1. The connecting plates 6 pass through the seat part 4 of the seat body 1. The chassis 5 is slidably connected to the seat part 4 through the connecting plates 6. The connecting plates 6 are provided with limit grooves 7 to limit the adjustment range of the tilt angle of the seat body 1. The seat body 1 is provided with a chair frame 9, which is connected to the backrest 3. The chair frame 9 includes a connecting rod 8, which is slidably connected to the connecting plates 6. The drive mechanism includes a motor. The two ends of the connecting rod 8 pass through the limit grooves 7 of the two connecting plates 6 respectively. The limit grooves 7 are waist-shaped grooves. The connecting rod 8 is connected to the drive mechanism. The connecting rod 8 slides in the limit grooves 7 through the motor, thereby driving the seat body 1 to achieve tilt angle adjustment.

[0034] Furthermore, a bushing 12 is fitted around the connecting rod 8. The bushing 12 has an inner hole for mounting the connecting rod 8, and the shape of the inner hole matches the shape of the connecting rod 8. Gears 10 are installed at both ends of the bushing 12. The bushing 12 is connected to the motor. The motor drives the bushing 12 to drive the gears 10 to move on the rack 11. The length of the bushing 12 is less than the length of the connecting rod 8. The connecting rod 8 can be fixedly connected to the chair frame 9 to form a stable support structure. The entire motion mechanism is located between the connecting plates 6, and the entire transmission structure is located in the middle of the seat part 4, which has good stability.

[0035] Furthermore, such as Figure 4 As shown, the bushing 12 has a positioning groove 13 at its end, and the gear 10 has a protrusion 14 on its inner wall. The protrusion 14 and the positioning groove 13 cooperate to limit the gear 10 at both ends of the bushing 12. The positioning groove 13 is an elongated strip with an open end, which allows the gear 10 to be quickly installed by aligning with the positioning groove 13 through the protrusion 14. The structure of the protrusion 14 and the positioning groove 13 can prevent the gear 10 from slipping on the bushing 12 and affecting the rotation efficiency. A motor housing 15 is also installed on the bushing 12. The motor housing 15 is used to house the motor. The motor housing 15 has a through hole and is fitted onto the bushing 12 through the through hole, so that the motor is installed on the seat part 4 without increasing the volume of the seat body 1 during installation. A reduction mechanism 16 is provided between the motor and the bushing 12 to increase the torque. In this embodiment, the reduction mechanism 16 is formed by two meshing bevel gears 10. One bevel gear 10 is connected to the motor output shaft, and the other bevel gear 10 is fitted onto the bushing 12. The inner wall of the bevel gear 10 fitted onto the bushing 12 is provided with a protrusion 14 for installation in the positioning groove 13 of the bushing 12. By increasing the torque through the reduction mechanism 16, even a small motor can drive the seat body 1 to move, which not only saves costs but also reduces the size of the motor and saves installation space.

[0036] On the other hand, in this embodiment, the basic shape of the bushing 12 can be circular. The circular bushing 12 needs to fix the gear 10 through the positioning groove 13. The bushing 12 can also be a square, rectangle or other polygons. In this case, the polygonal bushing 12 does not need to be provided with the positioning groove 13. It is only necessary to change the basic shape of the gear 10 fitting hole to match the bushing 12 to achieve the purpose of positioning and anti-slipping, which is convenient for installation and use.

[0037] Example 2 like Figures 1 to 5 As shown, this embodiment provides a child safety seat, including a seat body 1 and a base 2. The seat body 1 is mounted on the base 2, and the base 2 is used to fix the child safety seat in the vehicle. The seat body 1 includes a backrest 3 and a seat portion 4. The seat portion 4 is provided with an angle adjustment device, which includes a chassis 5 and a drive mechanism. The chassis 5 is disc-shaped and is adapted to the bottom of the seat portion 4 to support the seat body 1. The center of gravity of the seat body 1 rests on the chassis 5. The disc-shaped chassis 5 is installed between the seat body 1 and the base 2. The seat body 1 can automatically adjust its pitch angle on the chassis 5 through the drive mechanism. The entire angle adjustment device is located in the seat portion 4, which is closer to the center of gravity of the seat body 1, resulting in better rotational stability of the seat body 1.

[0038] The seat body 1 is equipped with a protective device 18. The angle adjustment device is used to electrically adjust the tilt angle of the seat body 1. The protective device 18 is used for leg pinch protection. When the angle adjustment device is used, the protective device 18 includes a sensor and a controller. When the sensor senses that the seat body is rotating and pinching the leg, it triggers the controller. The controller then controls the angle adjustment device to stop rotating or turn back to the original angle to prevent the seat body 1 from turning and accidentally injuring the child's limbs.

[0039] Two connecting plates 6 are symmetrically arranged on the chassis 5. The connecting plates 6 are basically arc-shaped and adapt to the shape of the seat body 1. The connecting plates 6 pass through the seat part 4 of the seat body 1. The chassis 5 is slidably connected to the seat body 1 through the connecting plates 6. The connecting plates 6 are provided with limit grooves 7 to limit the adjustment range of the tilt angle of the seat body 1. The seat body 1 is provided with a chair frame 9, which includes a connecting rod 8. The connecting rod 8 is slidably connected to the connecting plates 6. The drive mechanism includes a motor. The two ends of the connecting rod 8 pass through the limit grooves 7 of the two connecting plates 6 respectively. The limit grooves 7 are waist-shaped grooves. The connecting rod 8 is connected to the drive mechanism. The connecting rod 8 slides in the limit grooves 7 through the motor, thereby driving the seat body 1 to achieve tilt angle adjustment. A bushing 12 is fitted around the connecting rod 8. The bushing 12 has an inner hole for mounting the connecting rod 8, and the shape of the inner hole matches the shape of the connecting rod 8. Gears 10 are installed at both ends of the bushing 12. The bushing 12 is connected to a motor, and the motor drives the gears 10 to move on the rack 11 via the bushing 12. The length of the bushing 12 is less than the length of the connecting rod 8, allowing the connecting rod 8 to be fixedly connected to the chair frame 9, forming a stable support structure. The entire motion mechanism is located between the connecting plates 6, and the entire transmission structure is located in the middle of the seat 4, resulting in good stability. Figure 4 As shown, the bushing 12 has a positioning groove 13 at its end, and the gear 10 has a protrusion 14 on its inner wall. The protrusion 14 and the positioning groove 13 cooperate to limit the gear 10 at both ends of the bushing 12. The positioning groove 13 is an elongated strip with an open end, which allows the gear 10 to be quickly installed by aligning with the positioning groove 13 through the protrusion 14. The structure of the protrusion 14 and the positioning groove 13 can prevent the gear 10 from slipping on the bushing 12 and affecting the rotation efficiency. A motor housing 15 is also installed on the bushing 12. The motor housing 15 is used to house the motor. The motor housing 15 has a through hole and is fitted onto the bushing 12 through the through hole, so that the motor is installed on the seat part 4 without increasing the volume of the seat body 1 during installation. A reduction mechanism 16 is provided between the motor and the bushing 12 to increase the torque. In this embodiment, the reduction mechanism 16 is formed by two meshing bevel gears 10. One bevel gear 10 is connected to the motor output shaft, and the other bevel gear 10 is fitted onto the bushing 12. The inner wall of the bevel gear 10 fitted onto the bushing 12 is provided with a protrusion 14 for installation in the positioning groove 13 of the bushing 12. By increasing the torque through the reduction mechanism 16, even a small motor can drive the seat body 1 to move, which not only saves costs but also reduces the size of the motor and saves installation space.

[0040] On the other hand, in this embodiment, the basic shape of the bushing 12 can be circular. The circular bushing 12 needs to fix the gear 10 through the positioning groove 13. The bushing 12 can also be a square, rectangle or other polygons. In this case, the polygonal bushing 12 does not need to be provided with the positioning groove 13. It is only necessary to change the basic shape of the gear 10 fitting hole to match the bushing 12 to achieve the purpose of positioning and anti-slipping, which is convenient for installation and use.

[0041] Example 3 like Figure 6 and Figure 7 As shown, this embodiment provides a child safety seat based on embodiment 2. The seat body 1 is provided with a sensing device 17. The sensing device 17 is used to sense the empty seat status of the seat body 1. The sensing device 17 is a pressure sensor, which is installed in the seat part 4. The sensor determines whether there is a child on the seat body 1 by sensing the change in pressure in the seat part 4.

[0042] Furthermore, this embodiment provides a protection device 18 that is a pressure sensor. One end of the seat body 1 is a headrest, and the other end is a leg rest 19. The steering protection device 18 is set at the leg rest 19 of the seat body 1. During the steering process, when the seat body 1 is turned, the child's legs move closer to or further away from the leg rest 19, and the leg rest 19 senses the pressure change. Especially when adjusting the tilt angle, the larger the tilt angle, the closer the legs are to the leg rest 19, and the greater the pressure sensed by the leg rest 19. Moreover, the closer the legs are to the front adult seat, the more likely the seat body 1 will pinch the legs if it continues to turn. The protection device 18 is set at the leg rest 19. When the pressure reaches the set value, it is triggered, controlling the seat body 1 to stop. Two pressure sensors are set at intervals at the leg rest 19 to expand the sensing area and improve the sensing accuracy.

[0043] And / or, this embodiment may also provide a protection device 18 as a current sensor. During the turning process of the seat body 1, the center of gravity and the force it is subjected to change continuously. As a result, the force exerted by the drive mechanism of the angle adjustment device on the seat body 1 also changes continuously. The protection mechanism determines whether it is safe for the seat body 1 to continue turning by sensing the change in current of the drive mechanism. When the change in current reaches a set value, the protection device 18 is triggered to control the seat body 1 to stop turning, thereby ensuring the safety of the child riding in the seat.

[0044] This disclosure provides a child safety seat with a tilt adjustment mechanism. A connecting rod 8 is connected to a seat frame 9. A motor drives a bushing 12 mounted on the connecting rod 8. Gears 10 are installed at both ends of the bushing 12 and move on a rack 11 driven by the bushing 12. The rack 11 is mounted on a chassis 5, allowing the seat body 1 to be angled on the chassis 5. The connecting rod 8 and the seat frame 9 form a fixed support structure, improving stability during angle adjustment. A protective device 18 is installed in the seat to reduce the probability of accidental injury to a child during seat body rotation, improving safety. A sensor 17 is used to detect when the seat body 1 is not empty before activating the protective device 18, preventing wasted energy during empty seat protection. The child safety seat provided in this application has the advantages of compact structure, good support, and high safety.

[0045] The present disclosure has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the present disclosure and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present disclosure without departing from the principles of the present disclosure, and these improvements and modifications also fall within the protection scope of the claims of the present disclosure.

Claims

1. A child safety seat, characterized in that, The system includes a seat body, which comprises a backrest and a seat portion. The seat portion of the seat body is equipped with an angle adjustment device for electrically adjusting the tilt angle of the seat body. The angle adjustment device includes a chassis and a drive mechanism. The chassis is adapted to the seat portion and supports the seat body. The seat body is provided with a chair frame, which includes a connecting rod. A bushing is installed on the connecting rod, and gears are provided at both ends of the bushing. The length of the bushing is less than the length of the connecting rod. Two connecting plates are symmetrically arranged on the chassis. The connecting plates are provided with limit grooves. The connecting plates pass through the seat body, and the chassis is slidably connected to the seat body through the connecting plates. A rack that meshes with the gears is provided on the chassis. The drive mechanism includes a motor. The bushing connects to the motor, and the output end of the motor is connected to the gears. The motor drives the bushing to make the gears move on the rack. The connecting rod is slidably connected within the limit grooves of the connecting plates. Thus, the drive mechanism drives the seat body to move on the chassis through the chair frame. A motor housing is also mounted on the bushing. The motor housing is used to install the motor and a reduction mechanism. The motor housing has a through hole that fits into the bushing. The motor housing is fitted onto the bushing through the through hole, allowing the motor to be mounted on the seat. A reduction mechanism is provided between the bushing and the motor to increase torque. The seat is equipped with a protective device for preventing leg impact. The protective device includes a sensor and a controller. The sensor detects the rotation of the seat body to clamp the leg, triggering the controller to stop and / or retract the angle adjustment device.

2. A child safety seat according to claim 1, characterized in that, The bushing end is provided with a positioning groove, and the inner wall of the gear is provided with a protrusion. The protrusion cooperates with the positioning groove to limit the gear at both ends of the bushing.

3. A child safety seat according to claim 1, characterized in that, The seat body is also equipped with a sensing device, which is used to sense whether the seat body is empty. When the sensing device senses that the seat body is not empty, it activates a protection device.

4. A child safety seat according to claim 3, characterized in that, The protective device is located at the leg rest of the seat body; the protective device is triggered by sensing changes in pressure at the leg rest.

5. A child safety seat according to claim 3, characterized in that, The protection device is connected to the drive mechanism; the protection device is triggered by sensing changes in the current of the drive mechanism.

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