CN115056744B

CN115056744B - Safety belt metering device and safety belt monitoring system

Info

Publication number: CN115056744B
Application number: CN202210822489.5A
Authority: CN
Inventors: 陈宏民; 韩伟生; 刘冲; 岳力; 吕茂奇; 侯亮; 祝贺; 王鹏翔; 王成磊; 汪长军
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2024-03-12
Anticipated expiration: 2042-07-12
Also published as: CN115056744A

Abstract

The invention provides a safety belt metering device and a safety belt monitoring system, and relates to the technical field of automobile parts. The safety belt metering device comprises a rotating shaft and a detecting piece; the rotating shaft is used for being arranged on a winding path of the safety belt webbing and rotating along with the motion of the safety belt webbing, and the detecting piece is used for detecting the rotating angle of the rotating shaft. According to the invention, the rotation follow-up property of the rotating shaft along with the movement of the seat belt webbing is high, so that the accuracy of the position information of the seat belt webbing fed back by the detection part is high, the accumulated rotating angle of the rotating shaft rotated in the calibration direction can be obtained according to the rotating angle of the rotating shaft detected by the detection part, such as the number of turns, in the process of pulling out the seat belt, and the accurate measurement of the pulling-out length of the seat belt can be realized according to the measurement of the accumulated rotating angle, so that the subsequent various operations according to the measurement information of the seat belt measuring device are facilitated.

Description

Safety belt metering device and safety belt monitoring system

Technical Field

The invention relates to the technical field of automobile parts, in particular to a safety belt metering device and a safety belt monitoring system.

Background

Safety belts are generally provided in vehicles, and passengers are restrained by the safety belts, thereby improving the driving safety of the passengers. Vehicles generally have a belt wearing reminding function, when detecting that an occupant sits on a seat and detecting that a lock tongue of the belt is not inserted into a lock catch of the belt, an alarm is given, when detecting that an occupant sits on the seat and the lock tongue of the belt is in a state of being inserted into the lock catch, the alarm is not given, and actually, whether the occupant sits on the seat and whether the lock tongue is inserted into the lock catch or not can only be judged, if the occupant inserts the lock tongue of the belt into the lock catch from behind, or inserts the lock catch by directly using a part similar to the lock tongue, the alarm is not triggered. In order to solve the problem, the rotating shaft of the retractor is provided with a safety belt metering device, the pulling-out length of the safety belt is judged by detecting the rotating number of the rotating shaft, and the safety belt wearing alarm is carried out according to the pulling-out length, so that the accuracy of safety belt monitoring can be improved to a certain extent, however, the safety belt is long, a plurality of layers of safety belt webbing can be wound on a winding shaft, and the conditions of fold gaps and the like exist between the layers, and the accuracy of the safety belt metering device is poor.

Disclosure of Invention

The invention aims to solve the problem of how to improve the accuracy of the safety belt metering device in the related technology to a certain extent.

In order to solve at least one aspect of the above problems, at least to some extent, the present invention provides, in a first aspect, a seat belt metering device including a rotating shaft and a detecting member; the rotating shaft is used for being arranged on a winding path of the safety belt webbing and rotating along with the motion of the safety belt webbing, and the detecting piece is used for detecting the rotating angle of the rotating shaft.

Optionally, the rotating shaft is used for being arranged at one side of an outlet of the retractor.

Optionally, the seat belt metering device further includes a fixing frame and a resetting piece, a sliding groove is arranged on the fixing frame, the rotating shaft is slidably installed in the sliding groove, the extending direction of the sliding groove is obliquely arranged relative to the direction of screwing the seat belt webbing into the rotating shaft, and is obliquely arranged relative to the direction of screwing the seat belt webbing out of the rotating shaft;

the resetting piece is respectively connected with the fixing frame and the rotating shaft so as to drive the rotating shaft to slide relative to the sliding groove and keep the rotating shaft to be in contact with the safety belt webbing.

Optionally, the safety belt metering device further comprises a sliding seat, the sliding seat is arranged at two ends of the rotating shaft, the sliding seat is rotationally connected with the rotating shaft, the sliding seat is slidably connected with the sliding groove, and the rotating shaft is connected with the reset piece through the sliding seat.

Optionally, the detecting piece is disposed on the sliding seat;

or, the safety belt metering device further comprises a positioning identifier, the positioning identifier is arranged on the rotating shaft, the detecting piece is used for being arranged on the fixing frame at one end of the extending direction of the sliding groove, and the detecting piece is used for detecting the positioning identifier.

Optionally, the pivot include the axle body with the interval set up in limiting plate on the axle body, the limiting plate is followed the radial extension of axle body sets up, be used for the holding between the limiting plate the safety belt meshbelt, the location identification piece set up in limiting plate deviates from one side of safety belt meshbelt.

Optionally, the resetting piece comprises a first connecting part, a second connecting part used for being connected with the fixing frame, and an intermediate connecting structure connected between the first connecting part and the second connecting part; the first connecting portion is arranged to be an annular structure, the annular structure is used for being sleeved on the rotating shaft, the middle connecting structure is bent to form an elastic energy storage structure with an opening, and the opening faces the rotating shaft.

In a second aspect, the present invention also provides a safety belt monitoring system comprising a controller, an alarm and a safety belt metering device as described in the first aspect above;

the controller is used for determining the accumulated rotating angle of the rotating shaft of the safety belt metering device in the calibration direction in the process of pulling out the safety belt according to the detection information of the safety belt metering device, determining the pulling-out length of the safety belt according to the accumulated rotating angle and the diameter of the rotating shaft, and controlling the alarm to give an alarm according to the pulling-out length and the preset length range.

The safety belt monitoring system is provided with the safety belt metering device, can detect the accurate pull-out length of the safety belt through the metering device, and controls the alarm to alarm according to the pull-out length, so that the safety belt monitoring accuracy can be improved to a certain extent, and the safety performance can be improved to a certain extent.

Optionally, the safety belt monitoring system further comprises a buckle detection device for detecting a buckling state of a safety belt buckle corresponding to the seat, and an occupant detection device for detecting occupant riding information corresponding to the seat;

the controller is used for determining the pull-out length when an occupant and/or the safety belt lock catch are/is in a buckling state on the seat, and controlling the alarm to alarm when the pull-out length is out of the preset length range.

Optionally, the seat belt monitoring system further comprises an occupant detection device for detecting occupant seating information corresponding to the seat, wherein the occupant seating information comprises sign information and/or seating posture information of the occupant;

the controller is used for determining the preset length range corresponding to the passenger according to the sign information and/or the riding posture information, and controlling the alarm to alarm according to the pulled-out length and the preset length range.

Compared with the prior art, the seat belt metering device and the seat belt monitoring system have the advantages that the rotating shaft is arranged on the winding path of the seat belt webbing, the rotating shaft is always in contact with the seat belt webbing, the rotating shaft rotates along with the movement of the seat belt webbing, the follow-up performance of the rotating shaft is high, the accuracy of the position information of the seat belt webbing fed back by the detection information of the detection piece is high, the accumulated rotating angle of the rotating shaft rotated in the calibration direction can be obtained according to the rotating angle of the rotating shaft detected by the detection piece in the process of pulling out the seat belt, the rotating shaft is always in contact with the seat belt webbing, the accumulated rotating angle has one-to-one correspondence with the pulling-out length of the seat belt, the error is relatively small, and therefore, accurate metering of the pulling-out length of the seat belt can be achieved, various operations can be conveniently carried out according to the metering information of the seat belt metering device, for example, whether an occupant wears the seat belt correctly according to the pulling-out length of the seat belt can be judged, the accuracy of monitoring the seat belt can be improved, for example, the metering data can be recorded for providing data support for the subsequent analysis of collision reasons and vehicle safety performance when collision occurs.

Drawings

FIG. 1 is a schematic diagram of a seat belt monitoring system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a seat belt metering device disposed at a retractor in an embodiment of the invention;

FIG. 3 is a schematic view of the structure of the direction A in FIG. 2;

FIG. 4 is a schematic cross-sectional view of section A-A of FIG. 3;

FIG. 5 is a schematic structural view of a fixing frame according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a structure of a rotor in an embodiment of the present invention;

FIG. 7 is a schematic view of a sliding guide sleeve in the implementation of the present invention;

fig. 8 is a schematic structural view of an elastic member according to an embodiment of the present invention.

Reference numerals illustrate:

100-a seat belt metering device; 110-a rotating shaft; 111-shaft body; 112-limiting plates; 120-locating the identification member; 130-detecting piece; 140-fixing frame; 141-seat board; 142-ear panels; 143-a chute; 144-mounting slots; 150-sliding seat; 160-resetting piece; 161-a first connection; 162-intermediate connection structure; 163-a second connection; 170-a sliding guide sleeve; 200-a seat belt buckle; 300-occupant detection device; 400-alarm; 500-controllers; 600-seat belt webbing; 700-retractor.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, descriptions of the terms "embodiment," "one embodiment," "some embodiments," "illustratively," and "one embodiment" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.

The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. As such, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

The Z-axis in the drawing represents vertical, i.e., up-down position, and the positive direction of the Z-axis (i.e., the arrow of the Z-axis points) represents up, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents down; the X-axis in the drawing indicates a horizontal direction and is designated as a left-right position, and the positive direction of the X-axis (i.e., the arrow of the X-axis is directed) indicates a right side, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) indicates a left side; the Y-axis in the drawing indicates the front-back position, and the positive direction of the Y-axis (i.e., the arrow of the Y-axis is directed) indicates the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) indicates the rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis are meant to be illustrative only and not indicative or implying that the apparatus or component in question must be oriented, configured or operated in a particular orientation, and therefore should not be construed as limiting the invention.

As shown in fig. 2 to 4, an embodiment of the present invention provides a seat belt metering device 100, which includes a rotating shaft 110 and a detecting member 130; the rotation shaft 110 is configured to be disposed on a winding path of the webbing 600 and rotated with movement of the webbing 600, and the detecting member 130 is configured to detect a rotation angle of the rotation shaft 110.

Specifically, the seat belt metering device 100 may include a fixing frame 140, the fixing frame 140 may be used to mount the rotating shaft 110, and optionally may also be used to mount the detecting member 130, the rotating shaft 110 may be disposed on a movement path of the seat belt webbing 600 through the fixing frame 140, and the rotating shaft 110 may be rotated with respect to the fixing frame 140, so that the rotating shaft 110 may be rotated with the movement of the seat belt webbing 600.

The detecting member 130 is capable of detecting at least a rotation angle of the rotating shaft 110, and preferably is capable of detecting a rotation angle and a rotation direction of the rotating shaft 110, and of course, the rotation direction may be detected by sensing an acceleration of the webbing in combination with other components such as a retractor.

Illustratively, the detecting member 130 may be an encoder, which is connected to the fixing frame 140 and the rotating shaft 110, respectively. But is not limited thereto, as will be exemplified later, which may employ related techniques.

Taking the rotation of the spindle 110 in the calibration direction (e.g., the calibration direction is counterclockwise in fig. 2) as the webbing is pulled out by the biasing force, the webbing metering device metering process is exemplified as follows:

when the occupant pulls the seat belt, the lock tongue of the seat belt buckle is located at the upper end position of the seat belt, at this time, the pull-out length of the seat belt can be recorded as 0, the accumulated rotation angle of the rotation shaft 110 along the calibration direction is recorded as 0, and when the occupant pulls the seat belt, the accumulated rotation angle of the rotation shaft 110 along the calibration direction can be obtained according to the information of the rotation angle detected by the detecting member 130, and the accumulated rotation angle corresponds to the pull-out length of the seat belt pulled out one by one due to the line contact between the rotation shaft 110 and the seat belt webbing 600. For example, when the number of turns of the rotating shaft 110 is one, the cumulative rotation angle is 360 °, the pull-out length is the circumference of the rotating shaft 110, and the pull-out length is understood as the length from the upper end fixed point position to the lock tongue during the use of the seat belt, which is not described in detail herein.

In this way, in the seat belt measuring device 100 according to the present invention, the rotating shaft 110 is disposed on the winding path of the seat belt webbing 600, the rotating shaft 110 is always in contact with the seat belt webbing 600, the rotating shaft 110 follows the movement of the seat belt webbing 600, so that the accuracy of the position information of the seat belt webbing 600 fed back by the detection information of the detection member 130 is high, in the process of pulling out the seat belt, the cumulative rotating angle of the rotating shaft 110 in the calibration direction can be obtained according to the rotating angle of the rotating shaft 110 detected by the detection member 130, and since the rotating shaft 110 is always in contact (can be in line contact or multipoint contact) with the seat belt webbing 600, the cumulative rotating angle has a one-to-one correspondence with the pulling-out length of the seat belt, and the error is relatively small, thereby realizing accurate measurement of the pulling-out length of the seat belt, facilitating various operations according to the measuring information of the seat belt measuring device 100, for example, whether the seat belt is correctly worn by the occupant can be judged according to the pulling-out length of the seat belt, the accuracy of the seat belt monitoring can be improved, for example, the measuring data can be recorded when collision occurs, and the reason of collision data is provided for analyzing the following collision performance data.

In an alternative embodiment of the present invention, as shown in fig. 2 and 3, the rotary shaft 110 is configured to be disposed at the outlet side of the retractor 700.

That is, the rotation shaft 110 is provided for the webbing 600 to be screwed in or out at the retractor 700. As shown in fig. 2 and 3, the present invention is described by taking the case where the direction in which the webbing 600 is threaded into the retractor 700 coincides with the negative Z-axis direction, and the direction in which the webbing 700 is threaded out coincides with the positive Z-axis direction.

The seat belt metering device 100 further includes a fixing frame 140 for mounting the seat belt webbing 600, and at this time, a communication structure for passing through the seat belt webbing 600 and limiting the seat belt webbing 600 may be formed between the rotation shaft 110 and the fixing frame 140, which will not be described in detail herein.

That is, the installation of the rotation shaft 110 is achieved by the fixing frame 140, and the rotation shaft 110 is disposed near the retractor 700 and is located at one side of the webbing 600 that is rotated in or out of the retractor 700.

In this way, in the present embodiment, the belt webbing 600 and the rotating shaft 110 are favorably attached all the time, and at this time, the rotating shaft 110 can form a barrier to the belt webbing 600 at the retractor 700 to a certain extent, so that the belt webbing 600 is prevented from winding and knotting at the retractor 700.

As shown in fig. 2 to 5 and 8, in an alternative embodiment of the present invention, the seat belt metering device 100 further includes a fixing frame 140 and a reset member 160, a sliding slot 143 is provided on the fixing frame 140, the rotating shaft 110 is slidably installed in the sliding slot 143, and an extending direction of the sliding slot 143 is inclined with respect to a direction in which the seat belt webbing 600 is screwed into the rotating shaft 110 and is inclined with respect to a direction in which the seat belt webbing 600 is unscrewed from the rotating shaft 110;

the return member 160 is connected to the fixed frame 140 and the rotating shaft 110, respectively, to drive the rotating shaft 110 to slide relative to the sliding groove 143 and to keep the rotating shaft 110 in contact with the webbing 600.

In the present specification, the description will be given of the case where the "rotation shaft 110 is provided on the exit side of the retractor 700" as an example, and at this time, the direction in which the webbing 600 is rotated into the rotation shaft 110, that is, the direction in which the webbing 600 is rotated out of the retractor 700, that is, the extending direction of the chute 143 is inclined with respect to the direction in which the webbing 600 is rotated into or out of the retractor 700.

In order to ensure that the rotation of the rotation shaft 110 with the movement of the webbing 600, it is ensured that the friction between the rotation shaft 110 and the webbing 600 is rolling friction, which would affect the accuracy of the measurement of the actual pull-out length of the webbing if the rotation shaft 110 and the webbing 600 were separated from each other or sliding friction occurred.

Specifically, to avoid the separation of the webbing 600 from the shaft 110, an angle is formed between the two portions of the webbing 600 that are screwed into and out of the shaft 110 at the shaft 110 (for convenience of description, the angle is defined as a wrap angle later), the wrap angle needs to be smaller than 180 °, meanwhile, to avoid the rolling friction between the webbing 600 and the shaft 110 being converted into sliding friction, the wrap angle should not be too small, and when the wrap angle is too small, the shaft 110 may be subjected to a radial component force, and if the retractor 700 is locked, the shaft 110 may even be broken due to the too large radial component force, which affects the safety performance of the webbing.

It should be noted that, during the process of winding and unwinding the webbing 600 from the retractor 700, the number of layers of the webbing 600 wound around the retractor 700 is continuously changed, that is, the fluctuation of the position of the webbing 600 in and out of the retractor 700 is large, and due to the relatively large winding amount of the webbing 600 (when the crash protection function is triggered, it is larger), this position fluctuation may cause the webbing 600 to separate from the rotating shaft 110, or cause the above-mentioned wrap angle to be too small, which affects the measurement of the webbing 600, and affects the safety performance of the webbing.

Illustratively, in the present embodiment, the extending direction of the sliding slot 143 is disposed at an angle with respect to the positive direction of the Z-axis, for example, at an angle of 60 ° -150 °,80 ° -110 °, and 90 °, and the extending direction of the sliding slot 143 along the Y-axis in the drawings will be described later as an illustration of the present invention.

It should be noted that, the reset element 160 is respectively connected to the rotating shaft 110 and the fixed connection, the rotating shaft 110 may rotate relative to the reset element 160, for example, the rotating shaft 110 may be slidably and rotatably disposed in the chute 143, one end of the reset element 160 is sleeved on the rotating shaft 110, and the other end is connected to the fixing frame 140.

Specifically, when the webbing 600 is pulled by an external force to be rotated out of the retractor 700, the rotating shaft 110 rotates in the chute 143 under the influence of the webbing 600, and has a tendency to be slid in a positive direction such as the Y-axis in fig. 4, and at this time, the return member 160 provides a driving force for the rotating shaft 110 to move in a reverse direction to the Y-axis, as will be exemplified later.

Thus, in this embodiment, by providing the chute 143 for mounting the rotation shaft 110, and the extending direction of the chute 143 is inclined with respect to the direction in which the webbing belt 600 is threaded into or threaded out of the retractor 700, and driving the rotation shaft 110 with respect to the chute 143 by the return member 160 and keeping the rotation shaft 110 in contact with the webbing belt 600, as the webbing belt 600 is wound and unwound, even if the position in which the webbing belt 600 is threaded into or threaded out of the retractor 700 changes due to the change in the number of layers of the webbing belt 600 on the retractor 700, the webbing belt 600 and the rotation shaft 110 can be kept in good contact, specifically, the above-described wrap angle formed by the webbing belt 600 at the rotation shaft 110 can be within a certain angle range, and relative sliding or separation of the webbing belt 600 and the rotation shaft 110 can be avoided, so that the rotation shaft 110 and the webbing belt 600 can form good rolling friction, and the webbing belt metering device 100 can meter the webbing belt 600 relatively accurately. And, when the stress of the rotating shaft 110 is large due to emergency braking and the like, the rotating shaft 110 can slide relative to the sliding groove 143, so that the rotating shaft 110 is prevented from being damaged due to overlarge stress, the stability of the safety belt metering device 100 can be ensured to a certain extent, the safety performance of the safety belt is improved, the rigidity requirement of the rotating shaft 110 can be reduced to a certain extent, the reliability and the stability are high, and the rotating shaft 110 with a relatively small diameter can be selected under the condition of meeting the friction requirement.

As shown in fig. 2 and 4, in an alternative embodiment of the present invention, the seat belt metering device 100 further includes a sliding seat 150, the sliding seat 150 is disposed at two ends of the rotating shaft 110, the sliding seat 150 is rotatably connected with the rotating shaft 110, the sliding seat 150 is slidably connected with the sliding groove 143, and the rotating shaft 110 is connected with the reset member 160 through the sliding seat 150.

Illustratively, the sliding seat 150 is provided with a mounting hole for mounting the rotating shaft 110, the sliding seat 150 is slidably disposed in the sliding groove 143, the reset member 160 may be a compression spring, one end of the compression spring abuts against an end surface of the sliding seat 150 in the positive direction of the Y axis, and the other end of the compression spring abuts against an inner wall of the sliding groove 143 in the positive direction of the Y axis.

As shown in fig. 8, for example, the restoring member 160 may be a pulling member capable of providing a pulling force, and one end of the pulling member located in the positive direction of the Y axis is used for connection (may be fixedly or movably connected) with the sliding seat 150, and one end of the pulling member located in the opposite direction of the Y axis is used for connection with the fixing frame 140, for example, with a seat plate 141 described later.

Here, the sliding seat 150 and the sliding groove 143 may be in surface contact, for example, the sectional shape of the sliding seat 150 in the ZY plane may be rectangular or oval, of course, it may be in line contact, for example, the sectional shape of the sliding seat 150 in the ZY plane may be circular, for example, the sliding seat 150 is provided as a bearing, an inner ring of the bearing is fixedly connected with the rotating shaft 110, an outer ring of the bearing is slidably connected with the sliding groove 143, and an outer ring of the bearing is connected with the reset member 160.

As shown in fig. 2, 4, and 7, the belt metering device 100 may further include a slide guide sleeve 170 for mounting to the mount 140 (e.g., in a through hole formed in the ear plate 142) and for forming a slide slot 143, for improved sliding stability, service life, etc., and will not be described in detail herein.

In this embodiment, the seat belt metering device 100 further includes the sliding seat 150, the rotating shaft 110 is slidably mounted in the sliding groove 143 through the sliding seat 150, and the rotating shaft 110 is connected with the resetting member 160 through the sliding seat 150, so that the rotating shaft 110 is prevented from being directly connected with the sliding groove 143 and the rotating shaft 110 is prevented from being directly connected with the resetting member 160, the stress performance of the rotating shaft 110 can be improved to a certain extent, the rotation and the sliding of the rotating shaft 110 are not interfered with each other, and the reliability is high.

As shown in fig. 2 to 5, in an alternative embodiment of the present invention, the fixing frame 140 includes a seat plate 141 and an ear plate 142 disposed at one side of the seat plate 141, the ear plate 142 being used to mount the rotation shaft 110, the seat plate 141 also being used to mount the retractor 700. At this time, a communication structure for passing the webbing 600 is formed between the rotation shaft 110 and the seat plate 141.

As shown in fig. 3, specifically, in the X-axis direction, two lugs 142 are disposed opposite to each other, and both ends of the rotating shaft 110 are connected to the two lugs 142, respectively, and at this time, the rotating shaft 110 is located on the Z-axis positive direction side of the retractor 700. One end of the webbing 600 is connected to the retractor 700, and the other end is passed out from the above-described communication structure and through a webbing 600 guide provided at a position of a vehicle body (e.g., a B pillar) or a seat back or the like of the vehicle, and then connected to a tongue of a webbing buckle. It should be understood that in the above embodiment, the fixing frame 140 may be understood as a further processed and formed mounting frame of the retractor 700, and the structure thereof is not limited thereto, and the safety belt monitoring system of the present invention may be applied to existing vehicles such as vehicles equipped with the non-wearing reminding device, the occupancy sensing device and the retractor 700, and may also be applied to vehicles in production.

In an alternative embodiment of the present invention, the detecting member 130 is disposed on the sliding seat 150 (not shown in this embodiment).

Illustratively, the detecting member 130 is provided as an encoder coupled to the slide holder 150 and the rotary shaft 110, respectively.

At this time, the detecting member 130 is disposed on the sliding seat 150, only the sliding seat 150 and the rotating shaft 110 rotate relative to each other, and the reliability and practicality of the detected data of the detecting member 130 are high.

In contrast to the embodiment in which the detecting member 130 is disposed on the sliding seat 150, as shown in fig. 2, 4 and 6, in an alternative embodiment of the present invention, the seat belt metering device 100 further includes a positioning identifier 120, the positioning identifier 120 is disposed on the rotating shaft 110, the detecting member 130 is disposed at one end of the fixing frame 140 in the extending direction of the sliding slot 143, and the detecting member 130 is used for detecting the positioning identifier 120.

Illustratively, the detecting member 130 may be located at one end of the chute 143 in the Y-axis direction, and the lug plate 142 may be provided with a mounting groove 144 (fig. 5) for mounting the detecting member 130, and the positioning mark 120 may be a protrusion disposed on the circumference of the rotating shaft 110. In the axial direction (i.e., the X-axis direction) of the rotating shaft 110, the positions of the positioning mark member 120 and the detecting member 130 correspond, and in this case, the detecting member 130 may be a hall sensor, the positioning mark member 120 may be a magnet, the detecting member 130 or the positioning mark member 120 may be configured in plural, the average value of the rotation angle detection may be achieved by multiple sets of data to improve the data accuracy, and the detection of the steering may be performed simultaneously, which may be a related art, which will not be described in detail herein, for example, two magnets are disposed on the same circumference, the central angle between the two magnets is smaller than 180 °, for example, 60 °, and the rotation direction of the rotating shaft 110 may be determined according to the time interval of the detected three continuous signals of the detecting member 130 (the rotation speed of the rotating shaft 110 is unchanged in a short time).

When the detecting member 130 is disposed on the sliding seat 150 described above, the positioning identifier 120 is disposed on the rotating shaft 110, the positioning identifier 120 may also be a radio frequency tag, the detecting member 130 may be a radio frequency reader, and the positioning identifier 120 may be disposed in a plurality of pieces, so as to detect a plurality of subdivision rotating angles of the rotating shaft 110, and at the same time, detect a rotating direction of the rotating shaft 110, which may be a related technology, and will not be described in detail herein.

Taking a positioning mark 120 as an example, whenever the rotating shaft 110 rotates along with the movement of the webbing 600 until the detecting member 130 detects the positioning mark 120, the rotating shaft 110 rotates one turn, and the circumference of the portion of the rotating shaft 110 in contact with the webbing 600 is the length of the webbing drawn out or retracted, thereby realizing the measurement of the webbing. The detection piece 130 is arranged at one end of the sliding groove 143 on the fixing frame 140, whether the rotating shaft 110 slides in the sliding groove 143 or not can realize the detection of the positioning mark piece 120, and the measurement of the rotating angle of the rotating shaft 110 can be realized.

Of course, when the detecting member 130 is disposed on the sliding seat 150, the positioning identifier 120 may be disposed as well, which will not be described in detail herein.

In this way, each setting mode of the detecting member 130 can detect the positioning mark member 120 no matter whether the rotating shaft 110 slides in the sliding groove 143, and can measure the rotation angle of the rotating shaft 110, and the measurement is reliable.

As shown in fig. 4 and 6, in an alternative embodiment of the present invention, the rotating shaft 110 includes a shaft body 111 and limiting plates 112 disposed on the shaft body 111 at intervals, the limiting plates 112 extending in a radial direction of the shaft body 111, and the limiting plates 112 are disposed between them for accommodating the webbing 600.

Illustratively, the limiting plate 112 is provided in a disk-like configuration. When the webbing 600 passes around the rotation shaft 110, the webbing 600 is restrained by the restraining plate 112, and reliability and stability are high.

In addition, when the detecting member 130 is disposed at one end of the fixing frame 140 in the extending direction of the sliding slot 143, the positioning identifier 120 is disposed at a side of the limiting plate 112 away from the webbing 600. Illustratively, the locating tag 120 includes a bump on a side of the keeper plate 112 facing away from the seat belt webbing 600, and the detecting member 130 is a hall sensor. Thus, the limiting plate 112 can position the webbing 600 and can also mount the positioning mark 120, the mounting structure is reliable, and the collision between the positioning mark 120 and the webbing 600 can be avoided to a certain extent, so that the safety is high.

As shown in fig. 8, the reset element 160 includes a first connection portion 161, a second connection portion 163 for connection with the fixing frame 140, and an intermediate connection structure 162 connected between the first connection portion 161 and the second connection portion 163; the first connection portion 161 is configured as an annular structure, the annular structure is used for being sleeved on the rotating shaft 110, the intermediate connection structure 162 is bent to form an elastic energy storage structure with an opening, and the opening is arranged towards the rotating shaft 110.

Of course, the ring structure may be sleeved on the sliding seat 150 to connect with the rotating shaft 110.

The opening is directed toward the rotation shaft 110, that is, the portion of the intermediate connection structure 162 that is connected to the annular structure is distant from the portion of the rotation shaft 110 that is in contact with the webbing 600.

In this way, the reset piece 160 is sleeved on the rotating shaft 110 through the annular structure, the connection is stable, the middle connecting structure 162 is bent to form an elastic energy storage structure, instead of a spring in a winding form, and the space occupation of the reset piece 160 in the axial direction of the rotating shaft 110 can be reduced to a certain extent.

As shown in fig. 1, a further embodiment of the present invention provides a seat belt monitoring system comprising a controller 500, an alarm 400 and a seat belt metering device as described in the previous embodiments;

the controller 500 is configured to determine an accumulated rotation angle of the rotating shaft 110 of the seat belt metering device in a calibration direction during the process of pulling out the seat belt according to the detection information of the seat belt metering device, determine a pulling-out length of the seat belt according to the accumulated rotation angle and a diameter of the rotating shaft 110, and control the alarm 400 to alarm according to the pulling-out length and a preset length range.

The content of the pull length is described in the foregoing and is not described in detail here.

The alarm 400 may be provided with at least one form of warning indication, such as an audible and visual alarm, or other means, which will not be described in detail herein.

It should be noted that if the occupant inserts the seat belt tongue into the buckle from behind, or inserts the buckle directly with a tongue-like component, the pull-out length of the seat belt is clearly different from that of the occupant when the occupant is wearing the seat belt normally. Under the condition that an occupant wears the safety belt normally, even if the difference of the body type, the position and the like exists, the actual pull-out length of the safety belt also has a range (namely a preset length range), and when the actual pull-out length of the safety belt is smaller than the lower limit value of the preset length range, the condition that the occupant does not wear the safety belt is indicated, and possibly only a lock tongue of the safety belt is directly inserted into a lock hole; when the actual pull-out length of the webbing is greater than the upper limit of the preset length range, it is indicated that the pull-out length of the webbing is excessively long due to the incorrect wearing of the webbing by the occupant, or that the webbing retractor 700 is malfunctioning, both of which are due to the alarm. That is, the controller 500 is used to control the alarm 400 to alarm when the pull-out length is out of the preset length range.

It should be noted that, the foregoing description has been given about the cumulative rotation angle, for example, when the detecting member 130 detects only the number of rotations, the cumulative rotation angle is the product of the cumulative number of rotations and 360 °, and will not be described in detail here.

Thus, the safety belt monitoring system of the invention is provided with the safety belt metering device 100, and can detect the more accurate pull-out length of the safety belt through the metering device 100 and control the alarm 400 to alarm according to the pull-out length, thereby improving the accuracy of safety belt monitoring to a certain extent and improving the safety performance to a certain extent.

As shown in fig. 1, in an alternative embodiment of the present invention, the seat belt monitoring system further includes a buckle detection device 200 for detecting a buckled state of a seat belt buckle corresponding to a seat, and an occupant detection device 300 for detecting occupant seating information corresponding to the seat;

the controller 500 is configured to determine the pull-out length when an occupant is present in the seat and/or the seat belt buckle is in a buckled state, and control the alarm 400 to alarm when the pull-out length is outside the preset length range.

Illustratively, the seat belt buckle includes a tongue disposed at an end of the seat belt webbing and a lock hole disposed in the seat, and the buckle detecting device 200 is configured to detect whether the tongue is inserted into the lock hole.

The occupant detection apparatus 300 is capable of detecting the riding state of an occupant, and the specific implementation is not limited. For example, the occupant detection apparatus 300 includes a occupancy sensor capable of recognizing whether an occupant is seated; for example, the occupant detection apparatus 300 includes an imaging unit, which may be an in-vehicle imaging unit, by which it is possible to determine whether or not an occupant is seated on the seat, and information such as the height of the occupant after the seating.

That is, when there is an occupant in the seat, a pull-out length is determined, and when the pull-out length is outside the preset length range, the alarm 400 is controlled to alarm;

or when the safety belt lock catch is in a buckling state, determining the pull-out length, and when the pull-out length is out of the preset length range, controlling the alarm 400 to alarm;

or when the seat has an occupant and the safety belt lock catch is in a buckled state, the pull-out length is determined, and when the pull-out length is out of the preset length range, the alarm 400 is controlled to alarm.

Therefore, the situation that the safety belt is worn by the passenger is monitored from a plurality of dimensions, false wearing and incorrect wearing of the safety belt can be recognized to a certain extent, the accuracy and the reliability of monitoring of the safety belt monitoring system can be improved to a certain extent, the passenger is induced to wear the safety belt through warning prompt and the like, and accordingly the safety performance can be improved to a certain extent.

In an alternative embodiment of the present invention, the controller 500 is further configured to obtain sign information of the occupant (for example, when the seat occupant is present in the seat and the seat belt buckle is in a buckled state), and determine the preset length range corresponding to the occupant according to the sign information.

That is, the preset length range is set corresponding to the sign information of the occupant.

Illustratively, the occupant detection apparatus 300 includes a occupancy sensor device generally integrated on the seat cushion, and between the foam and the cushion cover, different signs of the occupant may correspond to different occupant hip sizes and stress points of the hip on the cushion, and the correspondence between the sign information and the preset length range is calibrated by a large amount of data.

Illustratively, the occupant detection apparatus 300 includes an image capturing unit that acquires an image of an occupant seated in a seat, generates sign information of the occupant therefrom, and calibrates a correspondence relationship between the sign information and a preset length range by a large amount of data.

Therefore, the preset length range of the safety belt corresponding to the sign of different passengers can be determined according to the sign of the different passengers, so that the preset length range is reduced to a certain extent, and the safety belt can be carefully monitored according to the sign of the passengers, so that the correctness of wearing the safety belt by the passengers can be monitored to a certain extent, and the safety performance is improved.

In an alternative embodiment of the present invention, the controller 500 is further configured to obtain seating posture information of the occupant (for example, when the occupant is present in the seat and the seat belt buckle is in a buckled state), and determine the preset length range corresponding to the occupant.

Specifically, the riding posture information may include inclination information of the seatback of the seat, and the riding posture information (when a portion of the seat belt is fixedly provided outside the seat, for example, on the B-pillar) may also include position information of the seat in the vehicle front-rear direction, and in this case, the riding posture information may be acquired by a posture adjustment device of the seat.

So that a preset length range (for example, a model of wearing the seat belt by the occupant is established and then a preset length range corresponding to the occupant is calculated) is obtained based on the arrangement position of the anchor point under the seat belt webbing 600, the guide ring arrangement position, the height adjustable range of the height adjuster (if the height adjuster and the guide ring are provided), the position of the lock hole of the seat belt buckle, and the riding posture information of the occupant.

Of course, the riding posture information may also be acquired by the image capturing unit, and at this time, one image capturing unit may acquire riding posture information of the occupant at one or more seats. Further, in this case, it is possible to further acquire an image of wearing the seat belt after the seat belt is worn by the occupant, and further judge whether the occupant is wearing the seat belt correctly or not by combining the images, and further adjust the preset length range.

Of course, in some embodiments, the controller may determine the preset length range corresponding to the occupant according to the sign information and the riding posture information. Therefore, the matching degree between the preset length range and the passenger is higher, the preset length range is more reasonable, and the situation that the passenger wears the safety belt can be better monitored.

Further, when equipped with the image pickup unit, when the occupant sits on the seat, the controller can acquire the sign information of the occupant through the image pickup unit and the occupancy sensor, the sign information including, for example, height information (e.g., height information determined by the occupant partial characteristics in the image range), the fixed point position of the seat belt (e.g., the position of the upper end fixed point of the seat belt adjusted by the seat belt height adjuster), the front-rear position of the seat, the inclination angle of the seat back, and the like, and can determine the preset length range corresponding to the occupant in synchronization therewith.

For example, the occupants are classified by percentage according to the range in which their height information is located, e.g., occupants below 1.5 meters in height, corresponding to 5% classification, occupants above 1.85 meters in height, corresponding to 95% classification, and occupants between 1.68-1.73 meters in height, corresponding to 50% classification.

After the occupant vital sign information is acquired, the controller 500 (e.g., a body controller) adjusts the seat, the height adjuster, and the like according to the calibration conditions. For example, the seat belt height adjuster needs to be adjusted to the ground at the time of 5% of the occupant, and the seat front-rear position is adjusted to the front position; the seat belt height adjuster is adjusted to the neutral position at 50% of the occupant, and the seat front-rear position is adjusted to the neutral position; the seat belt height adjuster is adjusted to the high position at 95% occupant; the seat front-rear position is adjusted to the rear position. For higher height occupants, the lower limit of the corresponding predetermined length range is relatively high, and will not be described in detail herein. Thus, when the occupant sits on the seat, the upper end fixing points of the seat and the seat belt can be adjusted to positions suitable for the occupant, and the predetermined length range of the seat belt pulled out matching with the occupant is generated at the same time, so that comfortable and safe sitting experience can be brought to the occupant.

In an alternative embodiment of the present invention, the controller 500 may also be configured to record the actual pull-out length during a calibration period when a crash condition is met.

For example, when the airbag is triggered, information on the change in the actual pull-out length of the seat belt before and after the airbag is triggered is recorded.

For example, the controller 500 is a body controller BCM, which is in communication connection with an airbag controller ACU, and when the seat belt is a seat belt with an electronic pretensioning force limiting function, the body controller BCM can obtain a pretensioning recovery stroke of the seat belt and a force limiting release stroke record within 10ms after the collision according to the change information of the actual pull-out length when the ACU sends an ignition command.

Therefore, the safety belt monitoring system can record the change of the actual pull-out length of the safety belt when the collision condition is met, and provide reliable basis for subsequent improvement of the safety belt, research of accident reasons and the like.

A further embodiment of the invention provides a vehicle comprising the seat belt monitoring system of the above embodiment. And will not be described in detail herein.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.

Claims

1. A seat belt metering device comprising a spindle (110) and a detecting element (130); the rotating shaft (110) is arranged on a winding path of the seat belt webbing (600) and rotates along with the movement of the seat belt webbing (600), and the detecting piece (130) is used for detecting the rotation angle of the rotating shaft (110);

the rotating shaft (110) is arranged close to the retractor (700) and is positioned at the outlet side of the retractor (700);

the safety belt metering device (100) further comprises a fixing frame (140) and a reset piece (160), wherein a sliding groove (143) is formed in the fixing frame (140), the rotating shaft (110) is slidably arranged in the sliding groove (143), the extending direction of the sliding groove (143) is obliquely arranged relative to the direction of screwing the safety belt webbing (600) into the rotating shaft (110), and is obliquely arranged relative to the direction of screwing the safety belt webbing (600) out of the rotating shaft (110);

the return member (160) is connected to the fixing frame (140) and the rotating shaft (110) respectively, so as to drive the rotating shaft (110) to slide relative to the sliding groove (143) and keep the rotating shaft (110) in contact with the webbing belt (600).

2. The seat belt metering device according to claim 1, wherein the seat belt metering device (100) further comprises a sliding seat (150), the sliding seat (150) is disposed at two ends of the rotating shaft (110), the sliding seat (150) is rotatably connected with the rotating shaft (110), the sliding seat (150) is slidably connected with the sliding groove (143), and the rotating shaft (110) is connected with the reset member (160) through the sliding seat (150).

3. The seat belt metering device according to claim 2, wherein the detection member (130) is provided on the slide seat (150);

or, the safety belt metering device (100) further comprises a positioning identifier (120), the positioning identifier (120) is arranged on the rotating shaft (110), the detecting piece (130) is arranged on the fixing frame (140) at one end of the extending direction of the sliding groove (143), and the detecting piece (130) is used for detecting the positioning identifier (120).

4. A seat belt metering device as claimed in claim 3, wherein the spindle (110) comprises a spindle body (111) and limiting plates (112) arranged on the spindle body (111) at intervals, the limiting plates (112) are arranged along the radial extension of the spindle body (111), the seat belt webbing (600) is accommodated between the limiting plates (112), and the positioning identifier (120) is arranged on the side of the limiting plates (112) facing away from the seat belt webbing (600).

5. The seat belt metering device according to claim 1, wherein the return member (160) comprises a first connecting portion (161), a second connecting portion (163) for connecting with the fixing bracket (140), and an intermediate connecting structure (162) connected between the first connecting portion (161) and the second connecting portion (163); the first connecting portion (161) is of an annular structure, the annular structure is used for being sleeved on the rotating shaft (110), the middle connecting structure (162) is bent to form an elastic energy storage structure with an opening, and the opening faces the rotating shaft (110).

6. A seat belt monitoring system comprising a controller (500), an alarm (400) and a seat belt metering device according to any one of claims 1 to 5;

the controller (500) is used for determining the accumulated rotation angle of the rotating shaft (110) of the safety belt metering device in the calibration direction in the process of pulling out the safety belt according to the detection information of the safety belt metering device, determining the pulling-out length of the safety belt according to the accumulated rotation angle and the diameter of the rotating shaft (110), and controlling the alarm (400) to alarm according to the pulling-out length and the preset length range.

7. The seat belt monitoring system according to claim 6, further comprising a buckle detection device (200) for detecting a buckled state of a seat belt buckle corresponding to a seat, and an occupant detection device (300) for detecting occupant seating information corresponding to the seat;

the controller (500) is used for determining the pull-out length when an occupant and/or the safety belt lock catch are/is in a buckled state on the seat, and controlling the alarm (400) to alarm when the pull-out length is out of the preset length range.

8. The seatbelt monitoring system according to claim 6, further comprising occupant detection means (300) for detecting occupant seating information corresponding to the seat, the occupant seating information including sign information and/or seating posture information of the occupant;

the controller (500) is used for determining the preset length range corresponding to the passenger according to the sign information and/or the riding posture information, and controlling the alarm (400) to alarm according to the pulled-out length and the preset length range.