Child safety seat

Abstract

The present disclosure relates to a child safety seat, comprising: a base; a seat body rotatably disposed on the base through a central rotating shaft; a headrest height-adjustably disposed on the seat body; a seat belt assembly adjustably connected between the headrest and the seat body, including a left shoulder belt, a right shoulder belt, a left crotch belt, a right crotch belt, and a front crotch belt branched from a central adjuster; a detection assembly for detecting the occupancy situation of the child safety seat; and an adaptive adjustment assembly communicatively connected to the detection assembly and configured to adaptively adjust the distance between the headrest and the seat body or the rotation angle of the seat body relative to the base according to the detection result of the detection assembly. The present disclosure can provide a foolproof design, enabling a guardian to adjust the child safety seat according to the sitting situation of a child occupant in the correct usage manner even when completely unfamiliar with the correct usage method of the child safety seat, thereby solving the problem that child safety seats are prone to misuse.

Description

Technical Field

[0001] The present disclosure relates to the field of child occupant equipment, and particularly to a child safety seat. Background Art

[0002] For children in a relatively young age group, especially those under 5 months old or with a height less than or equal to 830 MM, their guardians often pay more attention to whether the connection between the child safety seat and the motor vehicle is firm, and tend to overlook the correct use of the child safety seat. Some even completely do not understand the usage method of the child safety seat or have not carefully read the instruction manual of the child safety seat, which may easily lead to the problem of misusing the child safety seat.

[0003] The inventors have found through research that child safety seats are prone to be misused by guardians of child occupants in the following three scenarios:

[0004] 1) Do not know to what position the height of the headrest should be adjusted, and an inappropriate headrest height may pose a potential risk to the protection of the child occupant's head;

[0005] 2) Do not know how tight the seat belt restraint tension should be pulled. Pulling it too tight can easily make the child occupant uncomfortable, while pulling it too loose provides poor safety restraint for the child occupant;

[0006] 3) When using a child safety seat for child occupants of different heights, it is not clear whether the seat should be installed facing the front or the rear of the motor vehicle. Especially when a child occupant with a height less than 830 MM uses it, if the child safety seat is incorrectly installed and used forward, it can easily lead to very serious safety consequences. Summary of the Invention

[0007] In view of this, the present disclosure provides a child safety seat, which can prevent the child safety seat from being misused during use. Even if the guardian of the child occupant completely does not understand the correct usage method of the child safety seat, they can correctly adjust the child safety seat according to the sitting situation of the child occupant according to the intelligent detection signal of the child safety seat, thereby solving the problem that the child safety seat is prone to be misused.

[0008] In view of this, in one aspect of the present disclosure, there is provided a child safety seat, comprising:

[0009] A base fixedly connected to a motor vehicle through an ISOFIX connector;

[0010] A seat body rotatably arranged on the base through a central rotating shaft;

[0011] A headrest adjustably arranged on the seat body;

[0012] A seat belt assembly, adjustably and releasably connected to the headrest and the seat body, includes a left shoulder belt, a right shoulder belt, a left crotch belt, a right crotch belt, and a front crotch belt branched from a central adjuster;

[0013] A detection assembly for detecting the occupancy situation of the child safety seat; and

[0014] An adaptive adjustment assembly, communicatively connected to the detection assembly and configured to adaptively adjust the distance between the headrest and the seat body or the rotation angle of the seat body relative to the base according to the detection result of the detection assembly.

[0015] In some embodiments, the detection assembly includes:

[0016] An occupancy state detection module for detecting the occupancy state of a child occupant;

[0017] The adaptive adjustment assembly includes a headrest height adjustment module, which can adaptively adjust the distance between the headrest and the seat body according to the occupancy state detection of the occupancy state detection module.

[0018] In some embodiments, the occupancy state detection module includes:

[0019] A first pressure sensor for detecting the pressure value between the front crotch belt and the seat body;

[0020] The headrest height adjustment module includes:

[0021] A first servo motor; and

[0022] A gear-rack transmission mechanism having a gear and a rack, the gear being driven by the first servo motor and the rack being driven by the gear to adjust the distance between the headrest and the seat body;

[0023] The headrest height adjustment module is further configured to: when the pressure value measured by the first pressure sensor reaches a first preset pressure value, start the first servo motor to lower the headrest, and when the pressure value measured by the first pressure sensor reaches a second preset pressure value, stop the first servo motor, and thus stop the lowering of the headrest.

[0024] In some embodiments, the occupancy state detection module includes:

[0025] A second pressure sensor disposed on the lower end faces of the two wings of the headrest for measuring the pressure value of the two wings of the headrest pressing against the shoulders of the child occupant;

[0026] The headrest height adjustment module is further configured to: when the pressure value measured by the second pressure sensor reaches a threshold, stop the first servo motor, and thus stop the lowering of the headrest.

[0027] In some embodiments, the detection component includes:

[0028] A tensile force sensor, disposed at the connection between the front cross belt and the seat body, for measuring the magnitude of the tensile force of the seat belt assembly;

[0029] The headrest height adjustment module is further configured to: when the magnitude of the tensile force of the seat belt reaches a first tensile force threshold, lower the height of the headrest, and when the magnitude of the tensile force of the seat belt reaches a second tensile force threshold, stop the height adjustment of the headrest.

[0030] In some embodiments, the detection component includes:

[0031] A sitting posture shoulder height detection module for detecting the sitting posture shoulder height of the child occupant;

[0032] The adaptive adjustment component includes:

[0033] A seat body steering module, configured to, after the height adjustment of the headrest stops, adjust the seat body relative to the base from facing the front of the motor vehicle or facing the side door of the motor vehicle to facing the rear of the motor vehicle according to the detection result of the sitting posture shoulder height detection module.

[0034] In some embodiments, the seat body includes a backrest and a seat board, and the sitting posture shoulder height detection module includes:

[0035] A ranging device for measuring the distance between the shoulder of the child occupant and the sitting posture shoulder height reference line, and the sitting posture shoulder height reference line is the intersection line of the backrest and the seat board;

[0036] The seat body steering module is configured to: adjust the rotation angle of the seat body relative to the base around the central rotation axis according to the sitting posture shoulder height or height of the child occupant corresponding to the measured value of the distance between the actual sitting posture shoulder height position of the child occupant measured by the ranging device and the sitting posture shoulder height reference line.

[0037] In some embodiments, the ranging device includes:

[0038] A T-shaped permanent magnet is disposed on the backrest of the seat body, and the distance from the sitting shoulder height reference line is configured such that the space within a set interval from the sitting shoulder height reference line includes a strong magnetic region and a weak magnetic region distributed from top to bottom, while the space above the strong magnetic region includes a first non-magnetic region, and the space below the weak magnetic region includes a second non-magnetic region; and

[0039] A reed switch is disposed at the lower ends of the two wings of the headrest and is opposite to the T-shaped permanent magnet, and is configured to generate different magnetic flux changes when passing through the strong magnetic region, the weak magnetic region, the first non-magnetic region, and the second non-magnetic region, and correspondingly output different control instruction signals through a control circuit.

[0040] In some embodiments, the height of the T-shaped permanent magnet is 8 mm, the distance between the lower end of the T-shaped permanent magnet and the sitting shoulder height reference line is 321 mm, and the distance between the upper end of the T-shaped permanent magnet and the sitting shoulder height reference line is 329 mm.

[0041] In some embodiments, the height of the T-shaped permanent magnet relative to the backrest of the seat body is adjustable, so that the distance between the lower end of the T-shaped permanent magnet and the sitting shoulder height reference line is adjustable within the range of 321 - 329 mm, and the distance between the upper end of the T-shaped permanent magnet and the sitting shoulder height reference line is adjustable within the range of 329 - 337 mm.

[0042] In some embodiments, the seat body steering module includes:

[0043] A second servo motor; and

[0044] A bevel gear - crown gear transmission mechanism, wherein the bevel gear is driven by the second servo motor, and the crown gear is driven by the bevel gear to drive the seat body to rotate relative to the base around the central rotating shaft;

[0045] The seat body steering module is configured to:

[0046] When the reed switch moves from the weak magnetic region downward into the second non-magnetic region, control the seat body to turn towards the rear of the motor vehicle;

[0047] When the reed switch moves within the weak magnetic region, control the seat body not to rotate;

[0048] When the reed switch moves from the weak magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, control the seat body to turn towards the front of the motor vehicle;

[0049] When the reed switch moves from the strong magnetic region to the first non-magnetic region, further verify whether the seat body turns towards the front of the motor vehicle;

[0050] When the reed switch moves from the first non-magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, control the seat body to turn towards the front of the motor vehicle; and

[0051] When the reed switch moves from the strong magnetic region to the weak magnetic region, control the seat body to turn towards the rear of the motor vehicle.

[0052] In some embodiments, the seat body steering module includes:

[0053] A voice broadcast system module for discriminating the occupancy signal of the child safety seat sent by the detection component and triggering the speaker to emit pre-stored voice prompt information corresponding to different occupancy signals;

[0054] The seat body steering module is configured to:

[0055] When the reed switch moves from the strong magnetic region upwards into the first non-magnetic region, the voice broadcast system module emits a voice prompt that the sitting shoulder height detection range has been exceeded;

[0056] When the reed switch moves from the first non-magnetic region downwards into the strong magnetic region, the voice broadcast system module emits a voice prompt that the sitting shoulder height detection range has been entered;

[0057] When the reed switch moves from the weak magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, emit a voice prompt that the seat is installed forward and is suitable for using the motor vehicle seat belt;

[0058] When the reed switch moves from the strong magnetic region to the weak magnetic region, the voice broadcast system module emits a voice prompt to use the seat belt assembly and recommends installing the seat rearward;

[0059] When the reed switch moves from the weak magnetic region to the second non-magnetic region, the voice broadcast system module emits a voice prompt for installing the seat rearward;

[0060] When the reed switch moves from the second non-magnetic region to the weak magnetic region and stabilizes in the weak magnetic region, the voice broadcast system module emits a voice prompt for rearward installation and use; and

[0061] When the reed switch moves within the weak magnetic region, the voice broadcast system module does not emit a voice prompt.

[0062] In some embodiments, the seat body steering module includes:

[0063] Trigger switches are respectively arranged on both sides of the seat body and are configured to: in response to a pressing instruction, drive the seat body to turn 90 degrees clockwise or counterclockwise through the second servo motor, so that the seat body turns to the left side or the right side of the motor vehicle.

[0064] In some embodiments, the seat body turning module further includes:

[0065] A controller, communicatively connected to the second servo motor and the trigger switch, is configured to set the center position of the seat body facing the front of the vehicle as the initial position during the first use of the child safety seat, and record the rotation speed and duration of the second servo motor driving the seat body during the process of rotating 90 degrees clockwise or 90 degrees counterclockwise when the trigger switch is pressed once.

[0066] In some embodiments, the seat body turning module further includes:

[0067] Parking contacts are respectively distributed in the 3 o'clock direction, 6 o'clock direction, 9 o'clock direction and 12 o'clock direction of the base;

[0068] A controller, communicatively connected to the parking contacts, is configured to, when the trigger switch on one side of the seat body is pressed, enable the seat body turning module to drive the seat body to turn to the position where the trigger switch is pressed through the second servo motor, and be able to stop the second servo motor when the seat body rotates and abuts against the parking contacts at this position, so that the seat body stops turning when it is turned to the 3 o'clock direction, 6 o'clock direction, 9 o'clock direction or 12 o'clock direction.

[0069] In some embodiments, it further includes:

[0070] A voice control module, which can receive voice instructions issued by the caregiver of the child occupant and accordingly control the adaptive adjustment component, so that the distance between the headrest and the seat body or the rotation angle of the seat body relative to the base is adaptively adjusted.

[0071] Therefore, according to the embodiments of the present disclosure, the anti-mistake design of the child safety seat is realized through the detection component and the adaptive adjustment component. For the three scenarios prone to misoperation, the height of the headrest, the tightening degree of the seat belt and the turning of the seat body are respectively adjusted, so that even if the guardian of the child occupant completely does not understand the correct usage method of the child safety seat, the above-mentioned headrest, seat belt and the orientation of the seat body can be adjusted to reasonable positions according to the correct adjustment sequence, thereby solving the problem that the child safety seat is prone to be misused. Description of the Drawings

[0072] The accompanying drawings forming a part of the specification depict embodiments of the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0073] Referring to the accompanying drawings, the present disclosure can be more clearly understood from the following detailed description, wherein:

[0074] Figure 1 is a schematic structural view of the rear view angle of a child safety seat according to some embodiments of the present disclosure;

[0075] Figure 2 is a schematic structural view of the front view angle of a child safety seat according to some embodiments of the present disclosure;

[0076] Figure 3 is a schematic structural view of the connection state of a seat belt assembly in a child safety seat according to some embodiments of the present disclosure;

[0077] Figure 4 is a schematic sectional structural view of the side view angle of a child safety seat according to some embodiments of the present disclosure;

[0078] Figure 5 is a schematic view of the installation positions of a front cross belt and a first pressure sensor in a child safety seat according to some embodiments of the present disclosure;

[0079] Figure 6 is a schematic view of the installation position of a second pressure sensor in a child safety seat according to some embodiments of the present disclosure;

[0080] Figure 7 is a schematic structural view of a gear-rack transmission mechanism of a child safety seat according to some embodiments of the present disclosure;

[0081] Figure 8 is a disassembled schematic structural view of a gear-rack transmission mechanism and a first servo motor in a child safety seat according to some embodiments of the present disclosure;

[0082] Figure 9 is a schematic structural view of a second servo motor and a bevel gear-crown gear transmission mechanism of a child safety seat according to some embodiments of the present disclosure;

[0083] Figure 10 is a schematic structural view of a bevel gear-crown gear transmission mechanism of a child safety seat according to some embodiments of the present disclosure;

[0084] Figure 11 is a partially enlarged schematic structural view of a bevel gear-crown gear transmission mechanism of a child safety seat according to some embodiments of the present disclosure;

[0085] Figure 12 is a schematic structural view of a bevel gear-crown gear transmission mechanism of a child safety seat according to some other embodiments of the present disclosure;

[0086] Figure 13 is a schematic structural diagram of a T-shaped permanent magnet of a child safety seat according to some embodiments of the present disclosure;

[0087] Figure 14 is a schematic diagram of the relative positions of the T-shaped permanent magnet and the reed switch of a child safety seat according to some embodiments of the present disclosure;

[0088] Figure 15 is a schematic diagram of the installation position of the reed switch of a child safety seat according to some embodiments of the present disclosure;

[0089] Figure 16 is a schematic structural diagram of a clockwise 90-degree rotation button / counterclockwise 90-degree rotation button of a child safety seat according to some embodiments of the present disclosure;

[0090] Figure 17 is a schematic structural diagram of the rear view angle of a child safety seat according to some embodiments of the present disclosure.

[0091] In the figure:

[0092] 1, base; 11, ISOFIX connector; 2, seat body; 21, backrest; 22, seat board; 3, headrest; 4, seat belt assembly; 41, left shoulder belt; 42, right shoulder belt; 43, left crotch belt; 44, right crotch belt; 45, front crotch belt; 46, central adjuster; 51, first pressure sensor; 52, first servo motor; 53, gear-rack transmission mechanism; 54, second pressure sensor; 55, tension sensor; 61, T-shaped permanent magnet; 62, reed switch; 63, second servo motor; 64, bevel gear-crown gear transmission mechanism; 7, voice broadcast system module; 81, trigger switch.

[0093] It should be understood that the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. Detailed Embodiments

[0094] Now, various exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps, the components of the materials, the numerical expressions and values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0095] As used in this disclosure, terms such as "first", "second" and the like do not denote any order, quantity or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the elements preceding such terms cover the elements recited after such terms, and do not preclude the possibility of also covering other elements. Terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, such relative positional relationships may also change accordingly.

[0096] In this disclosure, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0097] All terms used in this disclosure (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0098] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and devices should be regarded as part of the specification.

[0099] As Figures 1 to 17 shown, in one aspect of this disclosure, a child safety seat is provided. In some embodiments, the child safety seat includes:

[0100] A base 1 fixedly connected to a motor vehicle through an ISOFIX connector 11;

[0101] A seat body 2 rotatably disposed on the base 1 through a central rotating shaft;

[0102] A headrest 3 adjustably disposed on the seat body 2;

[0103] A seat belt assembly 4 adjustably connected between the headrest 3 and the seat body 2, including a left shoulder belt 41, a right shoulder belt 42, a left crotch belt 43, a right crotch belt 44 and a front crotch belt 45 branched from a central adjuster 46;

[0104] A detection assembly for detecting the occupancy situation of the child safety seat; and

[0105] The adaptive adjustment component is communicatively connected to the detection component and is configured to adaptively adjust the distance of the headrest 3 relative to the seat body 2 or the rotation angle of the seat body 2 relative to the base 1 according to the detection result of the detection component.

[0106] The seat body 2 and the headrest 3 respectively constitute the load-bearing structural parts for the torso and head of the child passenger. On this basis, the safety belt assembly 4 is used to firmly restrain the child passenger in the accommodation space formed by the seat body 2 and the headrest 3. The basic structure of the child safety seat is composed of the seat body 2-headrest 3-seat belt assembly 4.

[0107] The safety belt assembly 4 includes a five-point safety belt, that is, five straps starting from a central connection point are respectively tied from the head and limbs of the child passenger to the seat body 2 or the headrest 3, so as to ensure that the child passenger will not drill out of the gap in the safety belt when an accident occurs in the motor vehicle.

[0108] Considering that different child passengers or growing child passengers have different physical conditions at different stages, there are new challenges in correctly using child safety seats: the height of the headrest 3 relative to the seat body 2, the tightness of the safety belt assembly 4 and the orientation of the safety seat all have different usage methods for child passengers with different physical conditions.

[0109] For example, the latest EU child safety seat standard ECE-R129 requires that a child's height must be installed rearward-facing on the rear seat of a motor vehicle before the child's height reaches 830MM (321MM±7 calculated based on the nominal sitting shoulder height and height of a Q series dummy). When the child's height reaches 985MM (329MM±7 calculated based on the nominal sitting shoulder height and height of a Q series dummy), it is recommended that the child safety seat be installed rearward-facing.

[0110] These regulations on the installation direction of seats require child caregivers to actively judge and operate the rear-facing or forward-facing seat installation based on the child's height or sitting shoulder height, provided that the child safety seat has a rotation function. In actual use scenarios, for child passengers with a height of less than 830MM, if the caregiver wants to take the child out of the rear-facing seat, the seat must first be turned from rear-facing to side-facing or forward-facing. When reused, the caregiver must turn the seat back to rear-facing again after putting the child in the seat again.

[0111] As can be seen, the above-mentioned operation of continuously adjusting the seat orientation is not only inconvenient but also very easy to overlook. Especially after a new caregiver is replaced and is not familiar with the usage requirements of the child safety seat, it is more likely to misuse the child safety seat. And if the child occupant grows tall to a certain extent and meets the requirements for forward installation of the child safety seat, and the caregiver fails to realize the adjustment timing, it is easy to mis-set the direction of the child safety seat due to negligence again.

[0112] For the height adjustment of the headrest 3, before leaving the factory, the child safety seat usually adjusts the headrest 3 to the lowest position and fastens and tightens the five-point seat belt. Therefore, for the first use, it is necessary to first press the unlocking button of the seat belt central adjuster 46, pull the five-point seat belt out from the guiding hole of the headrest 3, unfasten the seat belt buckle and distribute the seat belt on both sides of the body. Since the seat belt is configured to be guided out through the through hole of the headrest 3, it is only possible to raise the headrest 3 when the seat belt is in the stretched state.

[0113] After the child is seated, the standard height of the headrest 3 is that the lower ends of the two wings of the headrest 3 are close to the shoulders of the child occupant, and the lower end of the headrest 3 is flush with the edge of the child's head mandible angle, so as to provide more complete protection for the head of the child occupant. After adjusting the height of the headrest 3, then fasten the safety buckle of the five-point seat belt and tighten the front crotch belt 45 until the seat belt assembly 4 reaches the set restraint value.

[0114] However, what tests the caregiver is that since the tightness of the seat belt restraint is affected by the height adjustment of the headrest 3 - raising the headrest 3 will cause the seat belt to be tightened, and lowering the headrest 3 will cause the seat belt to be loosened, so the order of adjusting the headrest 3 first and then tightening the seat belt cannot be reversed, otherwise the safety protection effect of the child safety seat will be greatly reduced: the headrest 3 is not in the optimal position to protect the head of the child occupant; and then the seat belt is also in an incorrect position to restrain the shoulders and chest of the child occupant after being buckled and tightened.

[0115] In view of the above usage scenarios and pain points, the embodiments of the present disclosure detect the occupancy situation of the child safety seat through the detection component, and adaptively adjust the distance between the headrest 3 and the seat body 2 or the rotation angle of the seat body 2 relative to the base 1 through the adaptive adjustment component, so as to prevent the caregiver of the child occupant from misusing the child safety seat due to negligence or failure to master the correct usage method of the child safety seat.

[0116] Regarding the adjustment of the height of the headrest 3 of the child safety seat, it is preferably prior to the adjustment of the seat belt tension and the adjustment of the orientation of the seat body 2. Therefore, in some embodiments, the detection component includes: a riding state detection module for detecting the riding state of the child occupant. The adaptive adjustment component includes a headrest height adjustment module, and the headrest height adjustment module can adaptively adjust the distance of the headrest 3 relative to the seat body 2 according to the riding state detection of the riding state detection module.

[0117] Specifically, in some embodiments, the riding state detection module includes: a first pressure sensor 51 for detecting the pressure value between the front cross belt 45 and the seat body 2. The headrest height adjustment module includes: a first servo motor 52 and a gear-rack transmission mechanism 53. The gear of the gear-rack transmission mechanism 53 is driven by the first servo motor 52, and the rack is driven by the gear to adjust the distance of the headrest 3 relative to the seat body 2.

[0118] The headrest height adjustment module is further configured to: when the pressure value measured by the first pressure sensor 51 reaches the first preset pressure value, start the first servo motor 52 to lower the headrest 3, and when the pressure value measured by the first pressure sensor 51 reaches the second preset pressure value, stop the first servo motor 52, and then stop the lowering of the headrest 3.

[0119] Generally, the headrest height adjustment process of the child safety seat is adjusted from top to bottom. When the headrest 3 is relatively high, the pressure sensor provided on the "day" type buckle of the connection between the front cross belt 45 and the seat body 2 will also be under greater pressure due to the tighter seat belt. At this time, under the influence of the larger first preset pressure value, the headrest 3 will start the lowering process. When the height of the headrest 3 is adjusted from top to bottom, the pressure received by the pressure sensor will gradually decrease. When the second preset pressure value for appropriate tightness is reached, the height reduction process of the headrest 3 will be stopped.

[0120] It should be noted that the adjustment process of the headrest 3 can refer not only to the tightness of the seat belt assembly 4, but also to the relative position relationship between the headrest 3 itself and the child occupant. Specifically, in some embodiments, the riding state detection module includes: a second pressure sensor 54 provided on the lower end surfaces of the two wings of the headrest 3 for measuring the pressure value of the two wings of the headrest 3 pressing against the shoulders of the child occupant. The headrest height adjustment module is further configured to: when the pressure value measured by the second pressure sensor 54 reaches the threshold value, stop the first servo motor 52, and then stop the lowering of the headrest 3.

[0121] When the second pressure sensor 54 detects a pressure reaching the threshold, it indicates that the pressure of the headrest 3 on the shoulders of the child occupant has affected the riding experience, and at this time, the lowering of the headrest 3 should be stopped. For example, the headrest height adjustment module of the present disclosure is further configured to, after stopping the lowering of the headrest 3, take the vertical position corresponding to the pressure reaching the threshold as the origin and lift the headrest 3 upward by a preset distance, so as to directly make the headrest 3 in a reasonable height position.

[0122] In order to detect the tension condition of the seat belt assembly 4, in some embodiments, the detection assembly includes: a tension sensor disposed at the connection between the front cross belt 45 and the seat body 2 for measuring the tension magnitude of the seat belt assembly 4. The headrest height adjustment module is further configured to: lower the height of the headrest 3 when the tension magnitude of the seat belt reaches the first tension threshold, and stop the height adjustment of the headrest 3 when the tension magnitude of the seat belt reaches the second tension threshold.

[0123] The tension of the seat belt can be used as a trigger condition for stopping the height adjustment of the headrest 3, indicating that both the height of the headrest 3 and the tightness of the seat belt are in a reasonable range at this time. Thus, the tension of the seat belt can also be used as a trigger condition for starting to adjust the orientation of the seat body 2.

[0124] In some embodiments, the detection assembly includes: a sitting posture shoulder height detection module for detecting the sitting posture shoulder height of the child occupant. The adaptive adjustment assembly includes: a seat body steering module configured to, after the height adjustment of the headrest 3 stops, adjust the seat body 2 relative to the base 1 from facing the front of the motor vehicle or facing the side door of the motor vehicle to facing the rear of the motor vehicle according to the detection result of the sitting posture shoulder height detection module.

[0125] Considering the body shape differences of different child occupants, the orientation of the seat body 2 is adjusted with the sitting posture shoulder height of the child occupant as a reference quantity. The intersection line of the backrest 21 and the seat board 22 is the reference line for the sitting posture shoulder height module to detect the sitting posture shoulder height of the child occupant. Along the height direction of the backrest 21, child occupants of different heights will have sitting posture shoulder height lines at different heights, and the distance between the line connecting the lower ends of the two wings of the headrest 3 normally aligned with the shoulders of the child occupant and the sitting posture shoulder height reference line. When the child is constrained by the safety seat compliance, the distance between the line connecting the lower ends of the two wings of the headrest 3 and the sitting posture shoulder height reference line is slightly equal to the sitting posture shoulder height of the child occupant.

[0126] In some embodiments, the seat body 2 includes a backrest 21 and a seat board 22. The sitting posture shoulder height detection module includes a ranging device for measuring the distance between the shoulder of a child occupant and the sitting posture shoulder height reference line. The seat body steering module is configured to adjust the rotation angle of the seat body 2 relative to the base 1 around the central rotation axis according to the sitting posture shoulder height or height of the child occupant corresponding to the measured value of the distance between the actual sitting posture shoulder height position of the child occupant measured by the ranging device and the sitting posture shoulder height reference line.

[0127] In order to realize the linkage between the sitting posture shoulder height of a child occupant and the steering of the seat body 2, in some embodiments, the ranging device includes a T-shaped permanent magnet 61 and a reed switch 62. The T-shaped permanent magnet 61 is arranged on the backrest 21 of the seat body 2, and the distance relative to the sitting posture shoulder height reference line is configured such that the space within a set interval from the sitting posture shoulder height reference line includes a strong magnetic region and a weak magnetic region distributed from top to bottom, while the space above the strong magnetic region includes a first non-magnetic region, and the space below the weak magnetic region includes a second non-magnetic region.

[0128] The reed switch 62 is arranged at the lower ends of the two wings of the headrest 3 and is opposite to the T-shaped permanent magnet. The reed switch 62 is configured to generate different magnetic flux changes when passing through the strong magnetic region, the weak magnetic region, the first non-magnetic region, and the second non-magnetic region, and correspondingly output different control instruction signals through a control circuit.

[0129] In order to make the critical point of the steering of the seat body 2 determined by the T-shaped permanent magnet 61 and the reed switch 62 correspond to the optimal protection position for a child occupant in relevant technical standards, in some embodiments, the height of the T-shaped permanent magnet 61 is 8 mm, the distance between the lower end of the T-shaped permanent magnet 61 and the sitting posture shoulder height reference line is 321 mm, and the distance between the upper end of the T-shaped permanent magnet 61 and the sitting posture shoulder height reference line is 329 mm.

[0130] Of course, the caregiver of the child occupant can also adjust the position of the critical point of the steering of the seat body 2 within an interval that meets the requirements of technical standards. That is, in some embodiments, the height of the T-shaped permanent magnet 61 relative to the backrest 21 of the seat body 2 is adjustable, so that the distance between the lower end of the T-shaped permanent magnet 61 and the sitting posture shoulder height reference line is adjustable within the interval of 321 - 329 mm, and the distance between the upper end of the T-shaped permanent magnet 61 and the sitting posture shoulder height reference line is adjustable within the interval of 329 - 337 mm.

[0131] For those skilled in the art, to detect the sitting posture shoulder height of a child occupant, photo shooting and image analysis techniques can also be used. By comparing the sizes of the body images of the child occupant on both sides of the boundary line between the backrest 21 and the seat board 22 of the seat body 2, the sitting height of the child occupant can be calculated, and then the orientation of the seat body 2 can be adjusted.

[0132] To achieve the rotation of the seat body 2 relative to the base 1, in some embodiments, the seat body steering module includes: a second servo motor 63 and a bevel gear - crown gear transmission mechanism 64. The bevel gear of the bevel gear - crown gear transmission mechanism 64 is driven by the second servo motor 63, and the crown gear is driven by the bevel gear to drive the seat body 2 to rotate relative to the base 1 around the central rotating shaft.

[0133] The seat body steering module is configured to: when the reed switch 62 moves from the weak magnetic region downward into the second non - magnetic region, control the seat body 2 to turn towards the rear of the motor vehicle; when the reed switch 62 moves within the weak magnetic region, control the seat body 2 not to rotate; when the reed switch 62 moves from the weak magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, control the seat body 2 to turn towards the front of the motor vehicle; when the reed switch moves from the strong magnetic region to the first non - magnetic region, the control system further checks whether the seat body turns towards the front of the motor vehicle; when the reed switch moves from the first non - magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, control the seat body to turn towards the front of the motor vehicle; and when the reed switch 62 moves from the strong magnetic region to the weak magnetic region, control the seat body 2 to turn towards the rear of the motor vehicle.

[0134] For example, when the reed switch 62 moves downward relative to the backrest 21 of the body and crosses the lowest end of the permanent magnet, that is, when the moving height is lower than the sitting shoulder line height of 321 MM, the reed switch 62 is about to leave the magnet region, and the magnetic flux changes from a stable state to a significantly weakened direction. At this time, the detection signal triggers the seat body 2 to be forced to turn backward through the control system with a time delay, or triggers the voice system to prompt to install the seat body 2 backward.

[0135] When the reed switch 62 moves within the height range of the permanent magnet relative to the backrest 21 of the body, that is, when it moves between the sitting shoulder line heights of 321 - 329 MM, the magnetic flux has no obvious change, and the system does not make any prompt or action.

[0136] When the reed switch 62 moves upward relative to the backrest 21 of the seat body 2 and approaches the highest end of the T - shaped permanent magnet 61, that is, when the moving height is equal to the sitting shoulder line height of 329 MM, the magnetic flux of the reed switch 62 changes from a stable state to a significantly enhanced direction. At this time, a voice prompt is given: Please install the seat forward, and it is suitable to use the motor vehicle seat belt.

[0137] When the reed switch 62 continues to move downward from the sitting shoulder line height of 329 MM towards 321 MM relative to the seat body 2, the magnetic flux of the reed switch 62 changes from significantly enhanced to a stable state. At this time, a voice prompt is given: Please use the five - point seat belt, and it is recommended to install and use it backward.

[0138] When the reed switch 62 continues to move downward relative to the seat body 2 beyond the sitting shoulder height line of 321 MM, the magnetic flux of the reed switch 62 changes from a stable state to a weaker state, and the detection control system triggers the rotation structure to rotate the seat body 2 backward with a time delay.

[0139] In some embodiments, the seat body steering module includes: a voice broadcast system module 7 for discriminating the occupancy signal of the child safety seat sent by the detection component and triggering the speaker to emit pre-stored voice prompt information corresponding to different occupancy signals. The seat body steering module is configured as follows:

[0140] When the reed switch 62 moves upward from the strong magnetic region into the first non-magnetic region, a voice prompt that the sitting shoulder height detection range has been exceeded is emitted by the voice broadcast system module.

[0141] When the reed switch 62 moves downward from the first non-magnetic region into the strong magnetic region, a voice prompt that it has entered the sitting shoulder height detection range is emitted by the voice broadcast system module 7.

[0142] When the reed switch 62 moves from the weak magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, a voice prompt is emitted indicating that the seat is installed forward and is suitable for using the motor vehicle seat belt.

[0143] When the reed switch 62 moves from the strong magnetic region to the weak magnetic region, a voice prompt is emitted by the voice broadcast system module 7 recommending using the seat belt assembly and installing the seat backward.

[0144] When the reed switch 62 moves from the weak magnetic region to the second non-magnetic region, a voice prompt for installing the seat backward is emitted by the voice broadcast system module 7.

[0145] When the reed switch 62 moves from the second non-magnetic region to the weak magnetic region and stabilizes in the weak magnetic region, a voice prompt for installing and using the seat backward is emitted by the voice broadcast system module 7; and

[0146] When the reed switch 62 moves within the weak magnetic region, the voice broadcast system module 7 does not emit a voice prompt.

[0147] For example, when the reed switch 62 moves to the position flush with the sitting shoulder height line of 329 MM and stabilizes at this position, the voice broadcast system module 7 emits a voice prompt indicating that the seat should be installed forward and is suitable for using the motor vehicle seat belt.

[0148] When the reed switch 62 moves downward from the sitting shoulder height line of 329 MM to 321 MM, the voice broadcast system module 7 emits a voice prompt indicating that the five-point seat belt should be used and recommending installing and using the seat backward.

[0149] When the reed switch 62 moves downward from the height of 321 MM of the sitting shoulder height line, the voice broadcast system module 7 issues a voice prompt for rearward installation and use.

[0150] When the reed switch 62 moves upward between 321 MM and 329 MM from a position below the height of 321 MM of the sitting shoulder height line, the voice broadcast system module 7 issues a voice prompt for rearward installation and use.

[0151] When the reed switch 62 moves between 321 MM and 329 MM of the sitting shoulder height line, the voice broadcast system module 7 does not issue a voice prompt.

[0152] The inventor also found through research that for children who cannot enter and exit the child safety seat independently, caregivers need to pick up the children to complete sitting or getting out of the seat well. Therefore, there is a need for spatial convenience in the orientation of the opening of the seat body 2.

[0153] Generally, the motor vehicle requires the orientation of the seat body 2 to stay at the 3 o'clock direction or the 9 o'clock direction, that is, the two directions facing the vehicle doors on both sides are the best. Because in these two orientations, caregivers can directly pick up the children and seat them outside the vehicle, or directly pick up the children from the seat body 2 outside the vehicle.

[0154] In view of this, in some embodiments, the seat body steering module includes: trigger switches respectively arranged on both sides of the seat body 2 and configured to: in response to a pressing instruction, drive the seat body 2 to rotate clockwise or counterclockwise by 90 degrees through the second servo motor 63, so that the seat body 2 turns to the left side or the right side of the motor vehicle.

[0155] On this basis, the seat body steering module may further include: a controller communicatively connected to the second servo motor and the trigger switch, and configured to set the center position of the seat body facing the vehicle head direction as the initial position during the first use of the child safety seat, and record the rotation speed and duration of the second servo motor driving the seat body during the process of rotating 90 degrees clockwise or 90 degrees counterclockwise when the trigger switch is pressed once.

[0156] In some other embodiments, the seat body steering module further includes: parking contacts and a controller. The parking contacts are respectively distributed at the 3 o'clock, 6 o'clock, 9 o'clock, and 12 o'clock directions of the base 1. The controller, communicatively connected to the parking contacts, is configured to, when the trigger switch button on one side of the seat body is pressed, drive the seat body steering module to rotate through the second servo motor to turn the seat body to the direction position where the trigger switch is pressed, and be able to stop the second servo motor when the seat body rotates and abuts against the four parking contacts near this direction position, so that the seat body stops further turning when it is turned to the 3 o'clock, 6 o'clock, 9 o'clock, or 12 o'clock direction. In some embodiments, it further includes: a voice control module, which can receive voice commands issued by the caregiver of the child occupant and accordingly control the adaptive adjustment component to adaptively adjust the distance between the headrest 3 and the seat body 2 or the rotation angle of the seat body 2 relative to the base 1.

[0157] Similarly, the child safety seat can also issue a voice reminder in real time according to the detection result of the child occupant's riding situation, so as to urge the caregiver of the child occupant to actively adjust the child safety seat.

[0158] Therefore, according to the embodiments of the present disclosure, the anti-misoperation design of the child safety seat is realized through the detection component and the adaptive adjustment component. For the three scenarios prone to misoperation, the height of the headrest 3, the tightening degree of the seat belt, and the steering of the seat body 2 are respectively adjusted, so that even if the guardian of the child occupant does not understand the correct riding method of the child safety seat at all, they can adjust the above-mentioned headrest 3, seat belt, and the orientation of the seat body 2 to reasonable positions according to the correct adjustment sequence, thus solving the problem that the child safety seat is easily misused.

[0159] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0160] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A child safety seat, characterized in that, comprising: a base (1) fixedly connected to a motor vehicle through an ISOFIX connector (11); a seat body (2) rotatably arranged on the base (1) through a central rotating shaft, and the seat body (2) includes a backrest (21) and a seat board (22); a headrest (3) adjustably arranged on the seat body (2); a seat belt assembly (4) adjustably connected between the headrest (3) and the seat body (2), including a left shoulder belt (41), a right shoulder belt (42), a left crotch belt (43), a right crotch belt (44) and a front crotch belt (45) branched out from a central adjuster (46); a detection component for detecting the occupancy situation of the child safety seat; and an adaptive adjustment component communicatively connected to the detection component and configured to adaptively adjust the distance between the headrest (3) and the seat body (2) or the rotation angle of the seat body (2) relative to the base (1) according to the detection result of the detection component; wherein, the detection component includes a sitting posture shoulder height detection module for detecting the sitting posture shoulder height of a child occupant, and the sitting posture shoulder height detection module includes a distance measuring device for measuring the distance between the shoulder of the child occupant and a sitting posture shoulder height reference line, and the sitting posture shoulder height reference line is the intersection line of the backrest (21) and the seat board (22); the distance measuring device includes: a T-shaped permanent magnet (61) arranged on the backrest (21) of the seat body (2), and the distance relative to the sitting posture shoulder height reference line is configured such that the space within a set interval from the sitting posture shoulder height reference line includes a strong magnetic region and a weak magnetic region distributed from top to bottom, and the space above the strong magnetic region includes a first non-magnetic region, and the space below the weak magnetic region includes a second non-magnetic region; and a reed switch (62) arranged at the lower ends of the two wings of the headrest (3) and opposite to the T-shaped permanent magnet (61), and configured to generate different magnetic flux changes when passing through the strong magnetic region, the weak magnetic region, the first non-magnetic region and the second non-magnetic region, and correspondingly output different control instruction signals through a control circuit.

2. The child safety seat according to claim 1, characterized in that, the detection component includes: a riding state detection module for detecting the riding state of a child occupant; the adaptive adjustment component includes a headrest height adjustment module, and the headrest height adjustment module can adaptively adjust the distance between the headrest (3) and the seat body (2) according to the riding state detection situation of the riding state detection module.

3. The child safety seat according to claim 2, characterized in that, the riding state detection module includes: a first pressure sensor (51) for detecting the pressure value between the front crotch belt (45) and the seat body (2); the headrest height adjustment module includes: a first servo motor (52); and A gear-rack transmission mechanism (53) includes a gear and a rack. The gear is driven by the first servo motor (52), and the rack is driven by the gear to adjust the distance between the headrest (3) and the seat body (2). The headrest height adjustment module is further configured to: when the pressure value measured by the first pressure sensor (51) reaches a first preset pressure value, start the first servo motor (52) to lower the headrest (3), and when the pressure value measured by the first pressure sensor (51) reaches a second preset pressure value, stop the first servo motor (52), thereby stopping the lowering of the headrest (3).

4. The child safety seat according to claim 3, wherein, the riding state detection module includes: a second pressure sensor (54) disposed on the lower end surfaces of the two wings of the headrest (3) for measuring the pressure value of the two wings of the headrest (3) pressing against the shoulders of the child occupant; The headrest height adjustment module is further configured to: when the pressure value measured by the second pressure sensor (54) reaches a threshold value, stop the first servo motor (52), thereby stopping the lowering of the headrest (3).

5. The child safety seat according to claim 2, wherein, the detection component includes: a tension sensor disposed at the connection between the front cross strap (45) and the seat body (2) for measuring the tension of the seat belt assembly (4); The headrest height adjustment module is further configured to: when the tension of the seat belt reaches a first tension threshold, lower the height of the headrest (3), and when the tension of the seat belt reaches a second tension threshold, stop the height adjustment of the headrest (3).

6. The child safety seat according to any one of claims 3 to 5, wherein, the adaptive adjustment component includes: a seat body steering module configured to, after the height adjustment of the headrest (3) stops, adjust the seat body (2) relative to the base (1) from facing the front of the motor vehicle or facing the side door of the motor vehicle to facing the rear of the motor vehicle according to the detection result of the sitting posture shoulder height detection module.

7. The child safety seat according to claim 6, wherein, the seat body steering module is configured to: adjust the rotation angle of the seat body (2) relative to the base (1) around the central rotating shaft according to the sitting posture shoulder height or height of the child occupant corresponding to the distance measurement value between the actual measured sitting posture shoulder height position of the child occupant and the sitting posture shoulder height reference line by the distance measuring device.

8. The child safety seat according to claim 1, wherein, the height of the T-shaped permanent magnet (61) is 8 mm, the distance between the lower end of the T-shaped permanent magnet (61) and the sitting posture shoulder height reference line is 321 mm, and the distance between the upper end of the T-shaped permanent magnet (61) and the sitting posture shoulder height reference line is 329 mm.

9. The child safety seat according to claim 8, wherein, The T-shaped permanent magnet (61) is height-adjustable relative to the backrest (21) of the seat body (2) so that the distance between the lower end of the T-shaped permanent magnet (61) and the sitting shoulder height reference line is adjustable within the range of 321 - 329 mm, and the distance between the upper end and the sitting shoulder height reference line is adjustable within the range of 329 - 337 mm.

10. The child safety seat according to claim 6, wherein, the seat body steering module includes: a second servo motor (63); and a bevel gear - crown gear transmission mechanism (64), wherein the bevel gear is driven by the second servo motor (63), and the crown gear is driven by the bevel gear to drive the seat body (2) to rotate relative to the base (1) around the central rotating shaft; The seat body steering module is configured to: When the reed switch (62) moves from the weak magnetic region downward into the second non-magnetic region, control the seat body (2) to turn towards the rear of the motor vehicle; When the reed switch (62) moves within the weak magnetic region, control the seat body (2) not to rotate; When the reed switch (62) moves from the weak magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, control the seat body (2) to turn towards the front of the motor vehicle; When the reed switch (62) moves from the strong magnetic region to the first non-magnetic region, further verify whether the seat body (2) turns towards the front of the motor vehicle; When the reed switch (62) moves from the first non-magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, control the seat body (2) to turn towards the front of the motor vehicle; and When the reed switch (62) moves from the strong magnetic region to the weak magnetic region, control the seat body (2) to turn towards the rear of the motor vehicle.

11. The child safety seat according to claim 10, wherein, the seat body steering module includes: a voice broadcast system module (7) for discriminating the occupancy situation signal of the child safety seat sent by the detection component and triggering the speaker to emit pre-stored voice prompt information corresponding to different occupancy situation signals; The seat body steering module is configured to: When the reed switch (62) moves from the strong magnetic region upward into the first non-magnetic region, the voice broadcast system module (7) emits a voice prompt that the sitting shoulder height detection range has been exceeded; When the reed switch (62) moves from the first non-magnetic region downward into the strong magnetic region, the voice broadcast system module (7) emits a voice prompt that it has entered the sitting shoulder height detection range; When the reed switch (62) moves from the weak magnetic region to the strong magnetic region and stabilizes in the strong magnetic region, the voice broadcast system module (7) emits a voice prompt that the seat is installed forward and is suitable for using the motor vehicle seat belt; When the reed switch (62) moves from the strong magnetic region to the weak magnetic region, the voice broadcast system module (7) emits a voice prompt to use the seat belt assembly and recommends rearward installation of the seat; When the reed switch (62) moves from the weak magnetic region to the second non-magnetic region, a voice prompt for the rear-facing installation seat is issued by the voice broadcast system module (7); When the reed switch (62) moves from the second non-magnetic region to the weak magnetic region and stabilizes in the weak magnetic region, a voice prompt for rear-facing installation and use is issued by the voice broadcast system module (7); and When the reed switch (62) moves within the weak magnetic region, the voice broadcast system module (7) does not issue a voice prompt.

12. The child safety seat according to claim 10, wherein, the seat body steering module includes: Trigger switches (81) are respectively arranged on both sides of the seat body (2) and are configured to: in response to a pressing instruction, drive the seat body (2) to turn 90 degrees clockwise or counterclockwise through the second servo motor (63), so that the seat body (2) turns to the left side or the right side of the motor vehicle.

13. The child safety seat according to claim 12, wherein, the seat body steering module further includes: A controller is communicatively connected to the second servo motor (63) and the trigger switch, and is configured to set the center position of the seat body facing the front of the vehicle as the initial position during the first use of the child safety seat. When the trigger switch is pressed once, the rotation speed and duration of the second servo motor (63) driving the seat body during the process of rotating 90 degrees clockwise or 90 degrees counterclockwise are recorded.

14. The child safety seat according to claim 13, wherein, the seat body steering module further includes: Parking contacts are respectively distributed at the 3 o'clock, 6 o'clock, 9 o'clock, and 12 o'clock directions of the base; A controller is communicatively connected to the parking contacts and is configured to, when the trigger switch on one side of the seat body is pressed, enable the seat body steering module to drive the seat body to turn to the position where the trigger switch is pressed through the second servo motor, and be able to stop the second servo motor when the seat body rotates and abuts against the corresponding parking contact, so that the seat body stops turning when it is turned to the 3 o'clock, 6 o'clock, 9 o'clock, or 12 o'clock direction.

15. The child safety seat according to claim 1, wherein, it further includes: A voice control module can receive voice instructions issued by the caregiver of the child occupant and accordingly control the adaptive adjustment assembly to adaptively adjust the distance between the headrest (3) and the seat body (2) or the rotation angle of the seat body (2) relative to the base (1).

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