CN211995482U

CN211995482U - Safety belt based on rolling state detection

Info

Publication number: CN211995482U
Application number: CN202020710683.0U
Authority: CN
Inventors: 刘璐; 梁艳来; 张宇杭
Original assignee: Chongqing Technology and Business Institute Chongqing Radio and TV University
Current assignee: Chongqing Technology and Business Institute Chongqing Radio and TV University
Priority date: 2020-05-05
Filing date: 2020-05-05
Publication date: 2020-11-24
Anticipated expiration: 2030-05-05

Abstract

The utility model discloses a safety belt based on rolling state detection, which comprises a winder component, a braid and a lock tongue, wherein the winder component comprises a shell and a rotating shaft which is rotatably arranged on the shell, and one end of the braid is wound on the rotating shaft; the woven belt weaving device is characterized in that a distance sensor which faces the rotating shaft along the radial direction of the rotating shaft is arranged on the shell, and the distance sensor is located at a position, far away from the woven belt, on the shell. The utility model has the advantages of structural design is ingenious, can carry out accurate the detection to the state of pulling out of safety belt, detects the reliability height.

Description

Safety belt based on rolling state detection

Technical Field

The utility model relates to a car safety technical field, it is very much related to a safety belt based on rolling state detects.

Background

The automobile brings great convenience to the trip of people, but along with more and more automobiles on the road, traffic accidents happen occasionally, and safety belts are arranged on the automobile for guaranteeing the safety of drivers and passengers. According to statistics of the traffic department, the wearing of the safety belt is very important because the fastening of the safety belt can reduce the death rate of accidents by 85 percent.

In order to avoid a driver forgetting to fasten a safety belt in the driving process, the conventional automobile is provided with a safety belt fastening prompt system, whether a person sits on the seat is judged through pressure detection or other modes, then whether the safety belt is clamped into the fastener is detected, if the person sits on the seat and the safety belt is not clamped into the fastener, instrument equipment on the automobile can send out sound and light warning to remind the driver to fasten the safety belt.

However, some drivers still have slight safety awareness, so that the drivers feel troublesome and uncomfortable to fasten the safety belts, and are reluctant to fasten the safety belts due to the lucky psychology. In order to eliminate the disturbance of voice warning, the safety belt is hooked by inserting the safety belt directly from the back or inserting the safety belt by other plug-in buckles! Not only illegal violation, but also playing with own life, which is extremely irresponsible!

Therefore, the Chinese patent discloses 'detection equipment for preventing a safety belt from being fastened falsely and an implementation method thereof', the application number is 201811168848X, the pulling-out length of the safety belt is calculated by detecting the number of turns of a rotating shaft assembly of a retractor through a coding switch, and therefore whether a driver fastens the safety belt correctly or not can be judged. However, the coded switch can only detect in the power-on state, and a driver with a good fastening habit of the safety belt usually fastens the safety belt at the first time of getting on the vehicle, and the vehicle is likely to be in the unpowered state at this time.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a structural design ingenious, can accurately detect the state of pulling out of safety belt, detect the safety belt that the reliability is high detects based on rolling state detection.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a safety belt based on rolling state detection comprises a rolling device assembly, a braid and a lock tongue, wherein the rolling device assembly comprises a shell and a rotating shaft which is rotatably arranged on the shell, and one end of the braid is wound on the rotating shaft; the woven belt weaving device is characterized in that a distance sensor which faces the rotating shaft along the radial direction of the rotating shaft is arranged on the shell, and the distance sensor is located at a position, far away from the woven belt, on the shell.

The distance sensor is used for sensing the distance between the distance sensor and an object, is a mature prior art, and is widely applied in recent years, such as a smart phone. Through set up distance sensor on the casing, just can detect its and the winding distance between the epaxial meshbelt of pivot through distance sensor, and this distance receives the number of turns influence that the meshbelt was convoluteed, and the meshbelt is pulled out more, and the meshbelt number of turns of coiling is less in the pivot, and the interval that detects is big more. Conversely, the shorter the webbing pull-out length is, the smaller the detected pitch is. When the thickness of the mesh belt is constant, the distance between the distance sensor and the mesh belt wound on the rotating shaft is detected, and the pull-out length of the mesh belt can be calculated, so that whether the safety belt is fastened correctly can be judged. Therefore, the thickness state of the woven belt after the safety belt is pulled out is directly detected by the distance sensor to be judged, the detection can be carried out after the vehicle is powered on, and the use is more energy-saving and reliable.

Furthermore, two ends of the rotating shaft are respectively provided with a circular baffle which is coaxially arranged, rotatable rollers are coaxially arranged on the two circular baffles, and the rollers are provided with drawing openings through which the woven belts pass straightly; a winding space is formed between the roller and the rotating shaft; the maximum winding length of the winding space is smaller than the total length of the woven belt, and the length difference of the winding space and the woven belt is larger than the maximum pulling-out length of the woven belt in a state of being directly fastened by attaching to a seat and smaller than the minimum pulling-out length of the woven belt in a state of bypassing a driver and passengers to be fastened correctly.

Because the difference between the maximum winding length of the winding space and the total length of the woven belts is smaller than the minimum pulling-out length of the woven belts in a correct fastening state, when the woven belts are not fastened correctly, the woven belts are bound on the roller certainly, and when the woven belts are fastened correctly, the woven belts are not bound on the roller certainly, the roller and the rotating shaft are arranged coaxially, and the distance between the surface of the roller and the distance sensor is a fixed value. Therefore, in the running process of the vehicle, whether the safety belt is in a correct fastening state can be judged only by detecting whether the distance between the distance sensor and the roller direction is the value.

Furthermore, the inner diameter of the roller is consistent with the diameter of the circular baffle, and annular check rings which are formed by inward protrusion are arranged at the positions, close to the end parts, of the two ends of the roller, so that flanges are formed on the outer sides of the annular check rings; the inner diameter of the annular retainer ring is smaller than the diameter of the circular baffle plates, and the two circular baffle plates are abutted against the annular retainer ring from outside to inside along the axial direction of the roller and are embedded into the flange.

Like this, paste through the annular retaining ring of fixing in epaxial circular baffle and the cylinder and lean on, carry on spacingly to the cylinder in the axial, avoid cylinder axial float, and because the internal diameter of cylinder is unanimous with circular baffle's diameter for circular baffle makes cylinder and circular baffle be in coaxial state all the time under the effect of the outer flange of annular retaining ring. The structure is simple in matching, fault rate is reduced, and reliability is improved.

Furthermore, the rotating shaft comprises a winding part positioned in the middle, a first shaft section and a second shaft section are sequentially arranged at two ends of the winding part, and the diameter of the first shaft section is smaller than that of the winding part and larger than that of the second shaft section; the length of the first shaft section is smaller than the thickness of the circular baffle plate, and the middle part of the circular baffle plate is provided with a through hole matched with the first shaft section; the second shaft section is provided with threads, and the circular baffle is coaxially sleeved on the first shaft section and fixed on the rotating shaft through a bolt arranged on the second shaft section.

Because the length of the first shaft section is smaller than the thickness of the circular baffle plate, the circular baffle plate which is coaxially sleeved on the first shaft section is extruded on the step surface on the other side of the first shaft section under the action of the bolt on the second shaft section, and therefore the circular baffle plate can be fixed on the rotating shaft. In addition, the two circular baffles keep a fixed distance under the limitation of the winding part, so that the circular baffles can be prevented from being extruded on the annular baffle ring of the roller, and the roller can be ensured to smoothly rotate around the circular baffles.

Furthermore, the shape of the first shaft section on the cross section perpendicular to the axial direction is a regular quadrangle or a regular hexagon, and the through hole in the middle of the circular baffle is a matched regular quadrangle or a matched regular hexagon.

Like this, through the cooperation of regular quadrangle or regular hexagon's hole axle, can avoid the cylinder to drive the relative pivot rotation of circular flange around circular baffle pivoted in-process, and then influence the bolt to improve overall structure's reliability.

Furthermore, the drawing opening is arranged to be long in strip shape along the axial direction of the drum, the width of the drawing opening is consistent with the thickness of the woven tape, the middle of the woven tape is provided with a protruding portion with the increased thickness, the thickness of the protruding portion is larger than the width of the drawing opening, the length of the woven tape from the protruding portion to the rotating shaft is the maximum winding length of the winding space, and when the woven tape with the length is completely wound on the rotating shaft, a gap is formed between the woven tape and the inner wall of the drum.

Therefore, the braid positioned at the outer end of the protruding part can not enter the winding space through the protruding part with the thickness larger than the width of the pull opening, so that the braid can be prevented from entering the winding space without limit and filling the winding space, and the braid is extruded in the winding space to influence the normal pull-out use of the braid.

Further, the protruding part is rubber glued on the surface of the braid.

To sum up, the utility model has the advantages of structural design is ingenious, can carry out accurate the detection to the state of pulling out of safety belt, detects the reliability height.

Drawings

Fig. 1 is a schematic structural diagram of a conventional seat belt for a vehicle.

Fig. 2 is a schematic cross-sectional structure diagram of the retractor assembly portion of the present invention.

Fig. 3 is an exploded view of the rotating shaft and the drum.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the specific implementation: as shown in fig. 1 and 2, a safety belt based on rolling state detection comprises a rolling component 1, a mesh belt 2 and a lock tongue 3, wherein the rolling component 1 comprises a shell 11 and a rotating shaft 12 which is rotatably arranged on the shell 11, and one end of the mesh belt 2 is wound on the rotating shaft 12; the housing 11 is provided with a distance sensor 4 which is arranged along the radial direction of the rotating shaft 12 and faces the rotating shaft 12, and the distance sensor 4 is positioned on the housing 11 and is far away from the position where the mesh belt 2 is pulled out.

In implementation, two ends of the rotating shaft 12 are respectively provided with a circular baffle 13 which is coaxially installed, a rotatable roller 14 is coaxially installed on the two circular baffles 13, and a drawing opening 15 through which the braid 12 passes straightly is formed in the roller 14; a winding space 16 is formed between the roller 14 and the rotating shaft 12; the maximum winding length of the winding space 16 is smaller than the total length of the webbing 2, and the difference between the lengths is larger than the maximum pull-out length of the webbing 2 in a state of being directly fastened against a seat and smaller than the minimum pull-out length of the webbing 2 in a state of being correctly fastened by bypassing a driver and a passenger.

Because the sum of the pull-out length of the mesh belt directly fastened along the seat and the winding length on the roller is less than the minimum pull-out length of the mesh belt in a correct fastening state, when the mesh belt is not fastened correctly, the mesh belt is bound on the roller certainly, and when the mesh belt is fastened correctly, the mesh belt is not bound on the roller certainly, the roller and the rotating shaft are arranged coaxially, and the distance between the surface of the roller and the distance sensor is a fixed value. Therefore, in the running process of the vehicle, whether the safety belt is in a correct fastening state can be judged only by detecting whether the distance between the distance sensor and the roller direction is the value.

In implementation, the inner diameter of the roller 14 is consistent with the diameter of the circular baffle 13, and the positions of two ends of the roller 14 close to the end parts are provided with annular retaining rings 17 which are formed by inward protrusion, so that the outer sides of the annular retaining rings 17 form flanges; the inner diameter of the annular retainer ring 17 is smaller than the diameter of the circular baffle plates 13, and the two circular baffle plates 13 are abutted against the annular retainer ring 17 from outside to inside along the axial direction of the roller 14 and embedded into the flange.

In implementation, as shown in fig. 3, the rotating shaft 12 includes a winding portion 12a located in the middle, a first shaft section 12b and a second shaft section 12c are sequentially disposed at both ends of the winding portion 12a, and the diameter of the first shaft section 12b is smaller than that of the winding portion 12a and is larger than that of the second shaft section 12 c; the length of the first shaft section 12b is smaller than the thickness of the circular baffle 13, and the middle part of the circular baffle 13 is provided with a through hole matched with the first shaft section 12 b; the second shaft section 12c is provided with threads, and the circular baffle 13 is coaxially sleeved on the first shaft section 12b and fixed on the rotating shaft 12 through a bolt arranged on the second shaft section 12 c.

In this embodiment, the first shaft section 12b has a regular hexagon shape in a cross section perpendicular to the axial direction, and the through hole in the middle of the circular baffle 13 has a matching regular hexagon shape.

Like this, through regular hexagon's hole axle cooperation, can avoid the cylinder to drive the relative pivot of circular flange and rotate around circular baffle pivoted in-process, and then influence the bolt to improve overall structure's reliability.

In implementation, the drawing opening 15 is arranged in a long strip shape along the axial direction of the drum 14, the width of the drawing opening 15 is consistent with the thickness of the woven tape 2, the middle part of the woven tape 2 is provided with a protruding part 21 with increased thickness, the thickness of the protruding part 21 is greater than the width of the drawing opening 15, the length of the woven tape between the protruding part 21 and the rotating shaft 12 is the maximum winding length of the winding space 16, and when the woven tape with the length is completely wound on the rotating shaft 12, a gap is formed between the woven tape 2 and the inner wall of the drum 14. In particular, one end of the drawing opening 15 extends in the length direction and penetrates the drum, so that the installation and assembly of the webbing can be facilitated.

As shown in fig. 2, in this embodiment, the middle portion of the webbing 2 has a plurality of prefabricated holes equidistantly arranged along the length direction, and the protruding portion 21 is a snap fastener detachably fastened on at least one of the prefabricated holes. In particular implementation, the protrusion 21 may also be rubber glued to the surface of the webbing 2.

Therefore, the snap fastener can be buckled on the prefabricated holes at different positions according to different requirements when in use.

In this embodiment, the drum 14 has a yielding hole 18 penetrating in the radial direction, and when the webbing of the winding space is in a pulled-out state, the distance sensor 4 is directly facing the yielding hole in the radial direction.

Once a driver and passengers correctly fasten the safety belt, the woven belt in the winding space is pulled out without the woven belt wound on the drum, the distance sensor directly detects the distance of the woven belt wound on the rotating shaft through the abdicating hole, and the distance is certainly greater than the distance from the distance sensor to the surface of the drum, so that the fastening state of the safety belt can be judged more reliably through comparing the actually detected distance with the distance from the distance sensor to the surface of the drum.

In practice, the distance sensor 4 is an infrared distance sensor.

Adopt the utility model discloses the car blet of structure, concrete during operation judges whether someone takes a seat on the seat through pressure measurement or other modes earlier, later detects the safety belt again and whether blocks into the hasp, if do not have the spring bolt to insert in the hasp, directly sends the warning and reminds. If the lock catch detects that the lock tongue is inserted, the distance between the lock tongue and an object right in front is detected through the distance sensor, if the distance between the lock tongue and the object in front is detected to be larger than the distance between the lock tongue and the surface of the roller, the safety belt is judged to be fastened correctly, and if the distance between the lock tongue and the object in front is not detected to be larger than the distance between the lock tongue and the surface of the roller, the safety belt is judged to be not fastened correctly, and.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A safety belt based on rolling state detection comprises a rolling component (1), a mesh belt (2) and a lock tongue (3), wherein the rolling component (1) comprises a shell (11) and a rotating shaft (12) which is rotatably arranged on the shell (11), and one end of the mesh belt (2) is wound on the rotating shaft (12); the woven belt weaving device is characterized in that a distance sensor (4) arranged along the radial direction of the rotating shaft (12) and facing the rotating shaft (12) is arranged on the shell (11), and the distance sensor (4) is located at a position, far away from the woven belt (2), on the shell (11) and pulled out.

2. The safety belt based on the rolling state detection as claimed in claim 1, characterized in that, both ends of the rotating shaft (12) are respectively provided with a circular baffle (13) which is coaxially arranged, a rotatable roller (14) is coaxially arranged on the two circular baffles (13), and a drawing opening (15) for the flat passing of the mesh belt (2) is arranged on the roller (14); a winding space (16) is formed between the roller (14) and the rotating shaft (12); the maximum winding length of the winding space (16) is less than the total length of the mesh belt (2), and the length difference of the two is greater than the maximum pull-out length of the mesh belt (2) in a state of being directly fastened by attaching to a seat and less than the minimum pull-out length of the mesh belt (2) in a state of being fastened by bypassing a driver and passengers correctly.

3. The webbing belt based on winding state detection as claimed in claim 2, characterized in that the inner diameter of the drum (14) coincides with the diameter of the circular baffle (13), and the two ends of the drum (14) near the ends have annular collars (17) formed to protrude inward so that the outer sides of the annular collars (17) form flanges; the inner diameter of the annular retainer ring (17) is smaller than the diameter of the circular baffle plates (13), and the two circular baffle plates (13) are abutted against the annular retainer ring (17) from outside to inside along the axial direction of the roller (14) and are embedded into the flange.

4. The webbing based on the winding state detection according to claim 3, wherein the spindle (12) includes a winding portion (12 a) in a middle portion, both ends of the winding portion (12 a) are provided with a first shaft section (12 b) and a second shaft section (12 c) in this order, the first shaft section (12 b) having a diameter smaller than that of the winding portion (12 a) and larger than that of the second shaft section (12 c); the length of the first shaft section (12 b) is smaller than the thickness of the circular baffle (13), and the middle part of the circular baffle (13) is provided with a through hole matched with the first shaft section (12 b); the second shaft section (12 c) is provided with threads, and the circular baffle (13) is coaxially sleeved on the first shaft section (12 b) and fixed on the rotating shaft (12) through a bolt arranged on the second shaft section (12 c).

5. The webbing based on winding state detection as claimed in claim 4, wherein the first shaft section (12 b) has a shape in cross section perpendicular to the axial direction of a regular quadrangle or a regular hexagon, and the through hole in the middle of the circular flap (13) has a shape of a matching regular quadrangle or regular hexagon.

6. The webbing belt based on the winding state detection according to claim 2, characterized in that the draw opening (15) is provided in a long strip shape in the axial direction of the drum (14), and the width of the draw opening (15) coincides with the thickness of the webbing belt (2), the middle portion of the webbing belt (2) has a protruding portion (21) with an increased thickness, the thickness of the protruding portion (21) is larger than the width of the draw opening (15), the webbing belt length from the protruding portion (21) to the spindle (12) is the maximum winding length of the winding space (16), and when the webbing belt of this length is completely wound around the spindle (12), there is a gap between the webbing belt (2) and the inner wall of the drum (14).

7. The safety belt based on the winding state detection as claimed in claim 6, characterized in that the protrusion (21) is rubber glued to the surface of the webbing (2).