Adjusting method and device for anti-tightening safety belt

Abstract

The invention relates to the technical field of automobile safety equipment, in particular to an adjusting method and device for an anti-tightening safety belt, and the method comprises the following steps: installing an adjusting device in a contact area of the safety belt and a user, and winding a part of a belt body of the safety belt through a winding structure of the adjusting device; when a user wears the safety belt, an anti-tightening sleeve of the adjusting device is in contact with the body of the user; when the safety belt is tightened due to sudden braking, bumping or collision of a vehicle, the winding structure of the adjusting device is used for energy absorption and buffering, and the tightness of the safety belt is automatically adjusted. When a user wears the safety belt, the anti-tightening sleeve plays a preliminary buffering and anti-tightening effect; when the vehicle is braked suddenly or bumped or collided, the safety belt can be tightened, at the moment, the winding structure of the adjusting device starts to work, energy absorption and buffering are carried out through the structural characteristics of the winding structure, meanwhile, the tightness of the safety belt is automatically adjusted, the safety belt is prevented from being suddenly tightened excessively, and the probability of tightening injury to a user is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive safety equipment, and more specifically, to an adjustment method and device for an anti-strangulation seat belt. Background Art

[0002] With the improvement of people's living standards, more and more cars have entered every household, and users' requirements for the comfort of cars are also getting higher and higher. The automotive seat belt is a safety device equipped in each car. However, when a user fastens the automotive seat belt, the seat belt will always be in a tightened state, making the user's body constantly bear a sense of compression, which makes people feel uncomfortable. Moreover, the fixed tension of the traditional seat belt is likely to cause chest / shoulder strangulation to the occupants (especially children and pregnant women) during sudden braking or collisions, and manually adjusting the tightness of the seat belt cannot adapt to dynamic working conditions (such as bumps and collisions) in real time. Therefore, many drivers or passengers will give up using the automotive seat belt to make the journey more comfortable, but this will pose a serious hidden danger to driving safety. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an adjustment method and device for an anti-strangulation seat belt.

[0004] The technical solution adopted by the present invention is as follows:

[0005] An adjustment method for an anti-strangulation seat belt includes the following steps:

[0006] Install an adjustment device in the contact area between the seat belt and the user, and wind a part of the seat belt through the winding structure of the adjustment device;

[0007] When the user wears the seat belt, make the anti-strangulation sleeve of the adjustment device contact the user's body;

[0008] When the seat belt tightens due to sudden braking, bumping or collision of the vehicle, perform energy absorption and buffering through the winding structure of the adjustment device, and automatically adjust the tightness of the seat belt.

[0009] Furthermore, when the user wears the seat belt, make the flexible pressure sensor inside the anti-strangulation sleeve contact the user's body, and detect the pressure of the contact area between the seat belt and the human body in real time through the flexible pressure sensor; when the pressure reaches the first preset pressure value, unwind a part of the seat belt through the winding structure to reduce the pressure of the seat belt on the user.

[0010] Furthermore, when the flexible pressure sensor detects that the pressure reaches the second preset pressure value, rewind a part of the seat belt through the winding structure to prevent the seat belt from being unable to protect the user when the amplitude of sudden braking, bumping or collision of the vehicle is large; the second preset pressure value is greater than the first preset pressure value.

[0011] Furthermore, the flexible pressure sensor is a PVDF piezoelectric film sensor.

[0012] An adjustment device, which cooperates with any of the above-mentioned adjustment methods to adjust the tightness of the seat belt, includes: an anti-strangulation sleeve and a winding structure; after the anti-strangulation sleeve is installed on the seat belt, a portion of the belt body of the seat belt is pulled out from the installation port of the anti-strangulation sleeve away from the user side and is mounted on the winding structure, and then the winding structure is connected and fixed to the installation port of the anti-strangulation sleeve, so that energy absorption and buffering are performed through the anti-strangulation sleeve and the winding structure when the seat belt is tightened due to sudden braking, bumps or collisions of the vehicle.

[0013] Furthermore, the adjustment device further includes: a flexible pressure sensor installed on the side of the anti-strangulation sleeve that contacts the user's body, the flexible pressure sensor is electrically connected to the controller, and the controller is electrically connected to the winding structure.

[0014] Furthermore, the controller adopts an STM32 series microcontroller.

[0015] Furthermore, the winding structure includes: a winding roller assembly for threading the safety belt, the winding roller assembly is rotatably mounted on the tension frame, the tension frame is slidably mounted in the return groove of the force-bearing frame, and an energy-absorbing spring is connected between the bottom surface of the return groove and the tension frame; the force-bearing frame is fixed in the middle of the mounting support, and the four corners of the mounting support are connected to the rectangular frame of the anti-strangulation sleeve mounting port by bolts, and two threading openings for passing the safety belt are formed between the two ends of the mounting support and the rectangular frame.

[0016] Furthermore, the winding roller assembly includes: a swivel seat 1 and a swivel seat 2 which are relatively rotatable at both ends of the tension frame, the winding roller 1 is fixedly connected between the swivel seat 1 and the swivel seat 2, the winding roller 2 is slidably connected in the transverse through hole of the swivel seat 2, one end of the winding roller 2 is screwed in the internal thread groove of the swivel seat 1, and the other end of the winding roller 2 is provided with a rotating head; a clamping groove for threading a safety belt is formed between the winding roller 1 and the winding roller 2; the outer end of the swivel seat 1 is connected to the transmitting and receiving motor installed on the tension frame.

[0017] The two guide wheels are connected along the two ends of the guide wheel to the two end faces of the support frame, and the guide wheels are connected along the two ends of the guide wheel to the two end faces of the support frame.

[0018] Furthermore, the anti-strangulation sleeve comprises: an adhesive sleeve body provided with an installation opening, one end of the adhesive sleeve body is provided with a Velcro sub-surface and the other end is provided with a Velcro mother surface; two airbag assembly grooves are provided on the side of the adhesive sleeve body in contact with the user, and the inflatable airbag strips in the two airbag assembly grooves are connected with two guide tubes fixed on the rectangular frame of the installation opening through air tubes penetrating through the installation hole of the adhesive sleeve body, and the two guide tubes are sealedly connected with the two air ports of the inflatable cylinder, and the inflatable cylinder is fixedly connected to the rectangular center hole of the force-bearing frame; the inflatable cylinder is sealed An inflation piston plate is provided for sealing and sliding, and the inflation piston plate is fixedly connected to one end of the two piston rods. The middle parts of the two piston rods are slidably provided on the two end plates at the open end of the inflation cylinder. The ends of the two piston rods that pass through the outside of the inflation cylinder are fixedly connected to a transmission pressure frame arranged opposite to the winding roller assembly, and return tension springs are fixedly connected between the transmission pressure frame and the two end plates. When the winding roller assembly moves to a preset distance in the direction of the mounting support, it can contact the transmission pressure frame, thereby controlling the inflation piston plate to transport the gas in the inflation cylinder to the two inflatable airbag strips.

[0019] It can be seen from the above scheme that the beneficial effects of the present invention are:

[0020] When the user wears the seat belt, the anti-strangulation sleeve plays a certain role in buffering and increasing the contact area, achieving a preliminary buffering and anti-strangulation effect; when the vehicle encounters sudden braking, bumps or collisions, the seat belt will tighten, and the winding structure of the adjustment device will start to work, using its own structural characteristics to absorb energy and buffer, while automatically adjusting the tightness of the seat belt to avoid sudden over-tightening of the seat belt, reducing the probability of strangulation injuries to the user.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the accompanying drawings:

[0023] Figure 1 is a flowchart of the adjustment method of the anti-strangulation safety belt provided by the embodiment of the present invention;

[0024] Figure 2 is a first-direction schematic diagram of the adjustment device provided by the embodiment of the present invention;

[0025] Figure 3 is a second-direction schematic diagram of the adjustment device provided by the embodiment of the present invention;

[0026] Figure 4 is a cross-sectional view of the adjustment device provided by the embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of the anti-strangulation sleeve provided by the embodiment of the present invention;

[0028] Figure 6 is a partially enlarged schematic diagram of the anti-strangulation sleeve provided by the embodiment of the present invention;

[0029] Figure 7 is a first-direction schematic diagram of the winding structure provided by the embodiment of the present invention;

[0030] Figure 8 is a second-direction schematic diagram of the winding structure provided by the embodiment of the present invention;

[0031] Figure 9 is a schematic diagram of the winding roller assembly provided by the embodiment of the present invention;

[0032] Figure 10 is a schematic diagram of the tension frame provided by the embodiment of the present invention;

[0033] Figure 11 is a schematic diagram of the force-bearing frame and the mounting support provided by the embodiment of the present invention;

[0034] Figure 12 is a partial schematic diagram of the adjustment device provided by the embodiment of the present invention;

[0035] Figure 13 is a schematic diagram of the bonding sleeve body and the rectangular frame provided by the embodiment of the present invention;

[0036] Icons: Anti-choking sleeve 1; Adhesive sleeve body 101; Inflatable airbag strip 102; Diversion tube 103; Inflator 104; Inflatable piston plate 105; Piston rod 106; Transmission pressure frame 107; Winding structure 2; Flexible pressure sensor 3; Winding roller assembly 4; Rotating seat one 401; Rotating seat two 402; Winding roller one 403; Winding roller two 404; Tension frame 5; Limiting pressing block 501; Force-bearing frame 6; Rectangular frame 7; Threading opening 8; Mounting support 9; Overpressure sliding plate 10; Guide slider 11; Pressure guiding roller 12; Force-bearing block 13. Detailed implementation

[0037] In the following, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0039] Embodiment 1

[0040] Please refer to Figures 1 - 13 , the present invention provides an adjustment method for an anti-choking seat belt, including the following steps:

[0041] Install the adjustment device in the contact area between the seat belt and the user, and wind a part of the seat belt through the winding structure 2 of the adjustment device; when the user wears the seat belt, make the anti-choking sleeve 1 of the adjustment device contact with the user's body;

[0042] When the seat belt tightens due to sudden braking, bumping or collision of the vehicle, absorb energy and buffer through the winding structure 2 of the adjustment device, and automatically adjust the tightness of the seat belt.

[0043] When the user wears the seat belt, make the flexible pressure sensor 3 inside the anti-choking sleeve 1 contact with the user's body, and detect the pressure of the contact area between the seat belt and the human body in real time through the flexible pressure sensor 3. When the pressure reaches the first preset pressure value, unwind a part of the seat belt through the winding structure 2 to reduce the pressure of the seat belt on the user.

[0044] The working principle and technical effects of the above technical solutions are as follows:

[0045] An adjustment method for an anti-strangulation seat belt of the present invention installs an adjustment device in the contact area between the seat belt and the user. The winding structure 2 of the adjustment device winds a part of the belt body of the seat belt. When the user wears the seat belt, the anti-strangulation sleeve 1 of the adjustment device contacts the body, and at the same time, the flexible pressure sensor 3 inside the anti-strangulation sleeve 1 contacts the body. During normal vehicle driving, the seat belt is in a conventional wearing state, and the winding structure 2 maintains the status quo. The anti-strangulation sleeve 1 plays a role in buffering and increasing the contact area to a certain extent. The anti-strangulation sleeve 1 is made of a flexible material, achieving a preliminary buffering and anti-strangulation effect. The flexible pressure sensor 3 continuously detects the pressure of the contact area in real time; when the vehicle experiences sudden braking, jolting or collision, etc., the seat belt will tighten. At this time, the winding structure 2 of the adjustment device starts to work, uses its own structural characteristics to absorb energy and buffer, and at the same time automatically adjusts the tightness of the seat belt to avoid the seat belt suddenly tightening excessively; at the same time, the flexible pressure sensor 3 continuously and real-time detects the pressure of the contact area between the seat belt and the human body; when the detected pressure reaches the first preset pressure value, it means that the pressure of the seat belt on the user's body is too large, which may cause discomfort such as strangulation; at this time, the system controls the winding structure 2 to unwind a part of the belt body of the seat belt to relieve the pressure of the seat belt on the user and make it return to a more comfortable state. In the present invention, the anti-strangulation sleeve 1 increases the contact area between the seat belt and the human body, disperses the pressure, and reduces the strangulation feeling of the seat belt on the body from a physical level. When wearing the seat belt normally, the user will feel more comfortable; in the case of sudden braking, jolting or collision of the vehicle resulting in the seat belt tightening, the energy absorption and buffering and automatic adjustment functions of the winding structure 2 avoid the strong sense of oppression caused by the sudden tightening of the seat belt, and when the pressure reaches a certain value, the seat belt is automatically unwound, further reducing the pressure on the user's body and improving the riding comfort; by continuously monitoring the pressure with the flexible pressure sensor 3 and unwinding the seat belt when the pressure is too large, it can effectively prevent the seat belt from strangling the user's body, such as avoiding rib fractures, soft tissue contusions, etc.; in addition, although the seat belt will be unwound when the pressure is too large, this is carried out on the premise of ensuring that the user will not be overly strangled. The seat belt can still play a role in restraining and protecting the user to a certain extent, ensuring that when the vehicle is in danger, the user will not be injured due to the sudden tightening of the seat belt and affecting the overall safety protection effect. The use of the flexible pressure sensor 3 in the present invention realizes the real-time monitoring of the contact pressure between the seat belt and the human body, can automatically respond to unwind the seat belt according to the monitored pressure situation, without manual intervention by the user, meeting the comfort requirements and safety protection requirements of the human body. In the present invention, the flexible pressure sensor 3 is a PVDF piezoelectric film sensor, with a thickness of 0.1 mm, a bending resistance of > 100,000 times, and good stability.

[0046] When the flexible pressure sensor 3 detects that the pressure reaches the second preset pressure value, the winding structure 2 rewinds a part of the belt body of the seat belt to prevent the seat belt from failing to protect the user when the vehicle brakes suddenly, jolts or collides violently; the second preset pressure value is greater than the first preset pressure value.

[0047] When the vehicle brakes suddenly, jolts or collides violently, it may happen that the seat belt is unwound in advance to relieve pressure, resulting in the seat belt becoming too loose. When the flexible pressure sensor 3 detects that the pressure reaches the second preset pressure value (greater than the first preset pressure value), the winding structure 2 rewinds a part of the belt body of the seat belt, which can prevent the seat belt from failing to effectively restrain the user, ensure that the seat belt can still play a protective role in extreme situations, and reduce the risk of the user moving and colliding in the vehicle due to the loose seat belt. When the vehicle undergoes violent movement, the human body will have a large displacement tendency due to inertia. Rewinding the seat belt can better fit the human body. According to the principle of human body dynamics, it provides continuous and stable binding force for the user, reducing the possibility of the user being seriously injured. For example, it can prevent important parts of the user's head, chest, etc. from colliding with hard objects in the vehicle, realizing the dynamic adaptive adjustment of the tightness of the seat belt. Unwinding the seat belt when the pressure reaches the first preset pressure value in advance is to reduce the risk of strangulation and improve comfort; while rewinding the seat belt when the pressure reaches the higher second preset pressure value is to optimize the tightness of the seat belt again on the premise of ensuring safety. The dynamic balance adjustment mechanism takes into account both comfort and safety, enabling the seat belt to perform its best in different driving conditions and pressure conditions; through the precise adjustment of the tightness of the seat belt, it avoids the limitations of a single fixed tightness mode and can make corresponding adjustments according to the actual pressure situation in different degrees of vehicle abnormalities, keeping the seat belt in a state that can both relieve the user's burden and effectively protect, thereby improving the overall protective efficiency of the seat belt. The preset first and second pressure values can be adjusted according to the needs of different user groups (such as different ages, body types, physical conditions, etc.), which can not only meet the personalized safety and comfort requirements but also have wide universality, be applicable to various types of vehicles and different usage scenarios, and improve the versatility and practicality of the seat belt adjustment system.

[0048] Embodiment 2

[0049] Please refer to Figures 1 - 13, the present invention also provides an adjustment device that adjusts the tightness of the seat belt by using the adjustment method described in any one of the above. The adjustment device includes an anti-strangulation sleeve 1 and a winding structure 2. After the anti-strangulation sleeve 1 is installed on the seat belt, a part of the seat belt body is controlled to be pulled out from the installation opening on the side away from the user of the anti-strangulation sleeve 1 and sleeved on the winding structure 2, and then the winding structure 2 is fixedly connected to the installation opening of the anti-strangulation sleeve 1, so as to perform energy absorption and buffering through the anti-strangulation sleeve 1 and the winding structure 2 when the seat belt tightens due to sudden braking, bumping or collision of the vehicle. The winding structure 2 includes a winding roller assembly 4 for threading the seat belt. The winding roller assembly 4 is rotatably arranged on a tension frame 5. The tension frame 5 is slidably arranged in a return-shaped chute of a force-bearing frame 6. An energy absorption spring is connected between the bottom surface of the return-shaped chute and the tension frame 5. The force-bearing frame 6 is fixed in the middle of an installation support 9. The four corners of the installation support 9 are connected to a rectangular frame 7 of the installation opening of the anti-strangulation sleeve 1 by bolts. Two threading openings 8 for threading the seat belt are formed between the two ends of the installation support 9 and the rectangular frame 7.

[0050] The working principle and technical effect of the above technical solution are as follows: The adjustment device of the present invention adopts a detachable connection structure with the seat belt and can be installed according to actual needs. For different usage scenarios or user requirements, the installation or disassembly operation can be conveniently carried out, greatly improving the flexibility of use.

[0051] During installation, the anti-strangulation sleeve 1 and the winding structure 2 are in a separated state. First, the anti-strangulation sleeve 1 is installed on the safety belt. Then, a part of the belt body of the safety belt is controlled to be pulled out from the installation opening on the side of the anti-strangulation sleeve 1 away from the user and sleeved on the winding roller assembly 4 of the winding structure 2. Next, the four corners of the installation support 9 of the winding structure 2 are bolted to the rectangular frame 7 of the installation opening of the anti-strangulation sleeve 1, thus completing the connection between the safety belt and the adjusting device. The step-by-step installation method makes the installation process clearer and simpler, and even non-professionals can easily complete the installation, reducing the installation difficulty and cost. At this time, in addition to being sleeved on the winding roller assembly 4, the safety belt also passes through two threading openings 8 formed between the two ends of the installation support 9 and the rectangular frame 7 for passing the safety belt, making the connection of the safety belt in the adjusting device more stable, ensuring that during the driving of the vehicle, even under the action of various external forces, the safety belt will not easily break away from the adjusting device, ensuring the normal operation of the adjusting device. When the safety belt tightens due to sudden braking, jolting or collision of the vehicle, the safety belt will exert pressure on the winding roller assembly 4. At this time, the winding roller assembly 4 will slide in the return chute of the force-bearing frame 6 and compress multiple energy-absorbing springs in the return chute of the force-bearing frame 6, thereby playing an elastic tension buffering role through the multiple energy-absorbing springs, being able to effectively absorb and disperse the huge impact force generated when the safety belt suddenly tightens, avoiding excessive strangulation or other injuries to the human body caused by the safety belt, and ensuring the safety of the passengers. The compression process of the energy-absorbing springs is a dynamic buffering adjustment process, which can automatically adjust the magnitude of the buffering force according to the degree of tightening of the safety belt, and can provide appropriate buffering effects under different intensities of sudden braking, jolting or collision, ensuring that the safety belt can effectively restrain the human body without causing excessive harm to the human body.

[0052] Embodiment 3

[0053] Please refer to Figures 1 - 13 , the present invention also provides an adjusting device, wherein the winding roller assembly 4 includes: a first rotating seat 401 and a second rotating seat 402 rotatably arranged at both ends of the tension frame 5. A first winding roller 403 is fixedly connected between the first rotating seat 401 and the second rotating seat 402. A second winding roller 404 is slidably connected in the transverse through hole of the second rotating seat 402. One end of the second winding roller 404 is screwed into the internal thread groove of the first rotating seat 401, and a rotating head is provided at the other end of the second winding roller 404. A clamping groove for passing the safety belt is formed between the first winding roller 403 and the second winding roller 404. The outer end of the first rotating seat 401 is connected to a winding and unwinding motor installed on the tension frame 5. The adjusting device further includes: a flexible pressure sensor 3 installed on the side of the anti-strangulation sleeve 1 in contact with the user's body. The flexible pressure sensor 3 is electrically connected to a controller, and the controller is electrically connected to the winding structure 2.

[0054] The working principle and technical effect of the above technical scheme are as follows: in the adjusting device of the present invention, a clamping groove for threading the safety belt is formed between the winding roller 1 403 and the winding roller 2 404. When installing the safety belt, the rotating head is rotated to drive the winding roller 2 404 to rotate, so that the winding roller 2 404 is disengaged from the internal thread groove of the rotating seat 1 401, and then the winding roller 2 404 is drawn in, and the safety belt is sleeved on the winding roller 1 403, and then the winding roller 2 404 is inserted into and pressed on the side of the safety belt away from the winding roller 1 403, and the winding roller 2 404 is controlled to be reconnected to the internal thread groove of the rotating seat 1 401 by rotating the rotating head; when in use, the winding roller 1 403 and the winding roller 2 404 can be in a free state, that is, a state where the safety belt is not wound or unwound, and only the energy absorbing spring is used for elastic buffering; it can also be adjusted to: a state where part of the belt body of the safety belt is wound by the winding roller 1 403 and the winding roller 2 404, so as to facilitate the subsequent unfolding or winding of the safety belt, More diverse adjustments. In this state, the retracting and discharging motor can control the rotation of the rotating seat 401, and the rotating seat 401 can drive the winding roller 403, the winding roller 404 and the rotating seat 402 to rotate, so that the safety belt inserted in the clamping groove is reeled up by the rotation of the winding roller 403 and the winding roller 404; and when the user wears the safety belt, the flexible pressure sensor 3 on the inner side of the anti-strangulation sleeve 1 contacts the user's body, and the flexible pressure sensor 3 can detect the pressure of the contact area between the safety belt and the human body in real time. When the pressure reaches the first preset pressure value, the winding structure 2 unwinds part of the safety belt body to reduce the pressure of the safety belt on the user; when the flexible pressure sensor 3 detects that the pressure reaches the second preset pressure value, the winding structure 2 rewinds part of the safety belt body to prevent the safety belt from failing to protect the user when the vehicle brakes suddenly, bumps or collides with a large amplitude, thereby meeting the use needs of more actual situations.

[0055] Example 4

[0056] See also Figures 1 - 13Two limiting pressure blocks 501 are fixed on the tension frame 5, and the two limiting pressure blocks 501 slide relatively in the limiting slideways on both sides of the force-bearing frame 6. The outer side of the limiting pressure block 501 is an oblique pressure surface inclined from the outside to the inside. Two guide grooves are provided at both ends of the mounting support 9, and the two guide grooves are connected to the two through-wrap openings 8 one by one; an overpressure slide plate 10 is slidably connected in each guide groove, and a tension spring is fixedly connected between the overpressure slide plate 10 and the inner side of the guide groove. The end of the overpressure slide plate 10 close to the force-bearing frame 6 is connected to the outer side of the mounting support 9. The guide slider 11 of the side guide slide is connected, and the over-pressure slide plate 10 is inserted into one end of the winding mouth 8 and is provided with a guide pressure roller 12 for guiding and tightening the safety belt; force blocks 13 are fixed on the two guide sliders 11, and the two force blocks 13 are provided with a pressure inclined surface for cooperating with the inclined pressure surface on the side close to the force frame 6. When the winding roller assembly 4 drives the tension frame 5 and the limiting pressure block 501 to move to a preset distance in the direction of the mounting support 9, the inclined pressure surface contacts the pressure inclined surface and makes the two force blocks 13 move away from each other.

[0057] The working principle and technical effect of the above technical scheme are as follows: in the adjustment device of the present invention, when the vehicle brakes suddenly, bumps or collides, causing the seat belt to be tightened to a large extent, the seat belt generates a large pressure on the winding roller assembly 4. When the winding roller assembly 4 drives the tension frame 5 to slide to a preset distance in the force frame 6, the tension frame 5 drives the two limiting pressure blocks 501 to move in the direction of the mounting support 9. When the oblique pressure surfaces of the two limiting pressure blocks 501 contact the pressure inclined surfaces of the two force blocks 13, the two force blocks 13 can be pressed to move synchronously in the direction away from the force frame 6. At this time, the two force blocks 13 drive the two overpressure slide plates 10 to slide outward through the two guide sliders 11, and stretch the multiple tension springs, so that when the pressure is large, the elastic strength is increased by the multiple tension springs, and the displacement buffering speed of the tension frame 5 is gradually reduced, while ensuring the buffering, avoiding the problem of too soft buffering; and when the two overpressure slide plates 10 slide outward, they can drive the two pressure guide rollers 12 to press the seat belt against the inner side of the rectangular frame 7, further reducing the probability of the seat belt loosening and ensuring the protective effect of the seat belt itself.

[0058] Example 5

[0059] See also Figures 1 - 13, the anti-strangulation sleeve 1 includes: an adhesive sleeve body 101 provided with an installation opening, with a hook-and-loop fastener surface at one end and a loop-and-loop fastener surface at the other end of the adhesive sleeve body 101; there are two airbag assembly grooves on the side of the adhesive sleeve body 101 in contact with the user, and the inflatable airbag strips 102 in the two airbag assembly grooves are connected to two diversion tubes 103 fixed on the rectangular frame 7 of the installation opening through air tubes passing through the installation holes of the adhesive sleeve body 101, and the two diversion tubes 103 are hermetically connected to the two air ports of the inflator 104, and the inflator 104 is fixedly connected in the rectangular central hole of the force-bearing frame 6; an inflatable piston plate 105 is hermetically slid in the inflator 104, and the inflatable piston plate 105 is fixedly connected to one end of two piston rods 106, the middle parts of the two piston rods 106 are slid on the two end plates at the open end of the inflator 104, and the ends of the two piston rods 106 extending out of the inflator 104 are fixedly connected with a transmission pressure frame 107 arranged opposite to the winding roller assembly 4, and return spring 108 is fixedly connected between the transmission pressure frame 107 and the two end plates; when the winding roller assembly 4 moves towards the installation support 9 to a preset distance, it can contact the transmission pressure frame 107, so as to control the inflatable piston plate 105 to transport the gas in the inflator 104 into the two inflatable airbag strips 102.

[0060] The working principle and technical effect of the above technical solution are as follows: In the adjustment device of the present invention, when the vehicle brakes suddenly, jolts or collides, resulting in a large tightening amplitude of the seat belt, the pressure generated by the seat belt on the winding roller assembly 4 is relatively large. When the winding roller assembly 4 drives the tension frame 5 to slide in the force-bearing frame 6 to a preset distance, the winding roller assembly 4 contacts the transmission pressure frame 107, thereby pressing the transmission pressure frame 107 to move towards the inflator 104. At this time, the transmission pressure frame 107 drives the inflatable piston plate 105 to slide in the inflator 104 through the two piston rods 106, and stretches the return spring 108. It can not only play an enhanced elastic buffering role through the return spring 108, but also transport the gas in the inflator 104 into the two inflatable airbag strips 102 through the two diversion tubes 103 and two air tubes, so that the inflation amplitude of the two inflatable airbag strips 102 becomes larger, effectively fitting on the user's body and reducing the damage caused by the seat belt to the user; the inflation amplitude of the inflatable airbag strip 102 is automatically adjusted according to the tightening amplitude of the seat belt. When the vehicle brakes suddenly, jolts or collides slightly, the tightening amplitude of the seat belt is small, and the airbag strip may only expand slightly; while when the situation is more serious and the tightening amplitude of the seat belt is larger, the airbag strip will expand fully. The adaptive adjustment mechanism can provide the most suitable protection for the user according to the actual situation, improving the pertinence and effectiveness of the protection.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0062] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Although the embodiments of the present invention have been disclosed as above, they are not limited to only the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An adjustment method for an anti-strangulation seat belt, characterized in that, The following steps are involved: The adjusting device is installed in the contact area between the safety belt and the user, and a part of the safety belt body is wound by the winding structure of the adjusting device; When the user wears the safety belt, the anti-strangulation sleeve of the adjustment device contacts the user's body; When the seat belt is tightened due to sudden braking, bumps or collisions, the winding structure of the adjustment device absorbs energy and automatically adjusts the tightness of the seat belt.

2. The adjustment method of an anti-strangulation seat belt according to claim 1, characterized in that, When a user wears a seat belt, the flexible pressure sensor on the inside of the anti-strangulation sleeve comes into contact with the user's body, and the pressure in the contact area between the seat belt and the human body is detected in real time through the flexible pressure sensor; when the pressure reaches a first preset pressure value, part of the seat belt is unwound through the winding structure to reduce the pressure of the seat belt on the user.

3. The adjustment method of an anti-strangulation seat belt according to claim 2, characterized in that, When the flexible pressure sensor detects that the pressure reaches a second preset pressure value, the winding structure rewinds part of the seat belt to prevent the seat belt from failing to protect the user when the vehicle brakes suddenly, bumps or collides with a large amplitude; The second preset pressure value is greater than the first preset pressure value.

4. The adjustment method of an anti-strangulation seat belt according to claim 2, characterized in that, The flexible pressure sensor is a PVDF piezoelectric film sensor.

5. Adjusting device, which adjusts the tightness of the seat belt by using the adjusting method described in any one of claims 1-4, characterized in that include: Anti-stranglehold and winding structure; after the anti-stranglehold is installed on the seat belt, part of the seat belt body is pulled out from the installation port of the anti-stranglehold away from the user side and is mounted on the winding structure, and then the winding structure is connected and fixed to the installation port of the anti-stranglehold, so that the anti-stranglehold and the winding structure can absorb energy and buffer when the seat belt is tightened due to sudden braking, bumps or collisions of the vehicle.

6. The adjusting device according to claim 5, characterized in that, Also includes: A flexible pressure sensor is installed on the side of the anti-strangulation sleeve that contacts the user's body. The flexible pressure sensor is electrically connected to the controller, and the controller is electrically connected to the winding structure.

7. The adjusting device according to claim 5, characterized in that, The winding structure includes: a winding roller assembly for threading the safety belt, the winding roller assembly is rotatably arranged on the tension frame, the tension frame is slidably arranged in the return groove of the force-bearing frame, and an energy-absorbing spring is connected between the bottom surface of the return groove and the tension frame; the force-bearing frame is fixed in the middle of the mounting support, and the four corners of the mounting support are connected to the rectangular frame of the anti-strangulation sleeve mounting port by bolts, and two threading and winding ports for passing the safety belt are formed between the two ends of the mounting support and the rectangular frame.

8. The adjusting device according to claim 7, characterized in that The winding roller assembly includes: a rotating seat 1 and a rotating seat 2 which are relatively rotatable at two ends of the tension frame, the winding roller 1 is fixedly connected between the rotating seat 1 and the rotating seat 2, the winding roller 2 is slidably connected in the transverse through hole of the rotating seat 2, one end of the winding roller 2 is screwed in the internal thread groove of the rotating seat 1, and the other end of the winding roller 2 is provided with a rotating head; a clamping groove for threading the safety belt is formed between the winding roller 1 and the winding roller 2; the outer end of the rotating seat 1 is connected to the transmitting and receiving motor installed on the tension frame.

9. The adjusting device according to claim 7, characterized in that The cam is provided with two guide grooves at two ends of the guide grooves, and the two guide grooves are connected with the two through-holes one by one; an over-pressure slide plate is slidably connected to each of the guide grooves, and a tension spring is fixedly connected between the over-pressure slide plate and the inner side surface of the guide groove, and one end of the over-pressure slide plate is close to the force-bearing frame and is connected with a guide slide plate slidingly arranged on the guide slide plate on the outer side surface of the mounting support. The over-pressure slide plate is inserted into the through-hole and is rotated to guide and tighten the safety belt; force blocks are fixed on the two guide slide plates, and pressure inclined surfaces are provided on one side of the two force blocks close to the force frame for cooperating with the inclined pressure surface. When the winding roller assembly drives the tension frame and the limit pressure block to move in the direction of the mounting support to a preset distance, the inclined pressure surface contacts the pressure inclined surface, and makes the two force blocks move away from each other.

10. The adjusting device according to claim 7, characterized in that, The anti-stranglehold comprises: an adhesive sleeve body provided with an installation opening, one end of the adhesive sleeve body provided with a Velcro sub-surface and the other end provided with a Velcro mother surface; two airbag assembly grooves are provided on the side of the adhesive sleeve body in contact with the user, the inflatable airbag strips in the two airbag assembly grooves are connected with two guide tubes fixed on the rectangular frame of the installation opening through air tubes penetrating in the installation hole of the adhesive sleeve body, the two guide tubes are sealed and connected with two air ports of the inflatable cylinder, and the inflatable cylinder is fixedly connected to the rectangular center hole of the force-bearing frame; an inflatable piston plate is sealed and slidably arranged in the inflatable cylinder, the inflatable piston plate is fixedly connected to one end of the two piston rods, the middle parts of the two piston rods are slidably arranged on the two end plates at the open end of the inflatable cylinder, and the ends of the two piston rods passing out of the inflatable cylinder are fixedly connected with a transmission pressure frame arranged opposite to the winding roller assembly, and return tension springs are fixedly connected between the transmission pressure frame and the two end plates; when the winding roller assembly moves to a preset distance in the direction of the mounting support, it can contact the transmission pressure frame, thereby controlling the inflatable piston plate to transport the gas in the inflatable cylinder to the two inflatable airbag strips.

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