High-strength safety belt energy absorption device and safety belt

Abstract

The invention relates to the technical field of vehicle safety equipment, in particular to a high-strength safety belt energy absorption device and a safety belt, the high-strength safety belt energy absorption device comprises a shell, a fixed pipe, an outer pipe, a coil spring and a belt body, the fixed pipe is connected in the shell, the side wall of the fixed pipe is connected with the inner wall of the outer pipe through the coil spring, and the outer pipe is rotationally matched with the fixed pipe; the end of a belt body is connected to the outer pipe, the belt body is wound around the outer pipe, a buffer assembly is connected into the fixing pipe, the buffer assembly is arranged in the device and matched with a coil spring, after collision occurs, the coil spring absorbs energy of a part of impact force, and the buffer assembly absorbs energy of the other part of impact force; and the use safety of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle safety equipment, and particularly relates to a high-strength seat belt energy absorption device and a seat belt. Background Art

[0002] A buffer assembly is arranged inside the device. The buffer assembly cooperates with the spiral spring 4. After an impact occurs, the spiral spring 4 absorbs the energy of a part of the impact force, and the buffer assembly absorbs the energy of another part of the impact force, improving the safety of the device during use.

[0003] However, there are still deficiencies in the prior art. For example, a car seat belt with the patent number CN201811349516.1 includes a webbing, a retractor, a guide plate, a support assembly, an auxiliary device and a buckle. One end of the webbing is connected to the retractor, the other end of the webbing is provided with a buckle, a guide plate is installed at the middle position of the webbing, a support assembly is arranged inside the guide plate, a groove is formed at the top of the connecting plate, rotating shafts are embedded on both inner walls of the groove, a roller is installed at the upper end of the rotating shaft, connecting blocks are arranged at both ends of the connecting plate, sliders are installed on both sides of the connecting block, a spring is embedded at the bottom of the connecting block, and an auxiliary device is arranged on the outer wall of the webbing close to one side of the guide plate. An anti-slip pad is adhered to one inner wall of the sponge pad, a fixing block is arranged at the top of the sponge pad, and a slot is formed inside the fixing block. However, after an impact occurs, this device cannot buffer the impact force, and the safety of the device during use is extremely low. Summary of the Invention

[0004] The present invention provides a high-strength seat belt energy absorption device and a seat belt to solve the situation proposed in the background art.

[0005] To achieve the above-mentioned invention purpose, the present invention provides the following technical solutions: A high-strength seat belt energy absorption device and a seat belt, comprising: a housing, a fixed tube, an outer tube, a spiral spring and a belt body. The fixed tube is connected inside the housing, the side wall of the fixed tube is connected to the inner wall of the outer tube through the spiral spring, the outer tube is rotationally matched with the fixed tube, the end of the belt body is connected to the outer tube, the belt body is wound around the outer tube, and a buffer assembly is connected inside the fixed tube.

[0006] Preferably, each of the two side walls of the outer tube is connected to the inner wall of a retaining ring, and the belt body is arranged between the two retaining rings.

[0007] Preferably, each of the two side walls of the fixed tube is connected to the inner wall of a sealing ring, the outer tube is rotatably connected between the two sealing rings, a sealing cavity is formed among the sealing ring, the fixed tube and the outer tube, and the spiral spring is arranged inside the sealing cavity.

[0008] Preferably, the buffer assembly includes: a air supply member and a conduit. The air supply member is connected to the inner wall of the housing. One end of the conduit is connected to the air supply member, the other end of the conduit is connected to the inner wall of the sealing cavity, and the conduit is connected to the fixed tube.

[0009] Preferably, the buffer assembly further includes: an adjustment tube, an exhaust groove, a lateral adjustment groove and a driving member. A sealing disc is connected to one end of the fixed tube facing the direction of vehicle travel. The adjustment tube is slidably sealed within the fixed tube, and both ends of the adjustment tube are sealed. One end of the adjustment tube is connected to the driving member. An exhaust groove is formed on the side wall of the adjustment tube, and the end of the exhaust groove is coaxially arranged with the conduit. The other end of the exhaust groove is opened at the end of the adjustment tube and faces the sealing disc. Two opposite lateral adjustment grooves are formed through the side wall of the adjustment tube, and the lateral adjustment grooves are arranged between the sealing ring and the conduit.

[0010] Preferably, one end of a pressure relief tube is connected to the fixed tube, and the other end of the pressure relief tube faces the pinion of the air supply member. An exhaust hole is formed in the housing, and a check valve is installed in the exhaust hole.

[0011] Preferably, the air supply member further includes: a toothed ring, an air pump and an intake pipe. A toothed ring is connected to the retaining ring facing the direction of vehicle travel. The toothed ring is meshed with the pinion, the pinion is connected to the input shaft of the air pump connected within the housing, one side of the air pump is connected to the end of the conduit, the other side of the air pump is connected to the end of the intake pipe, and the other end of the intake pipe is disposed outside the side wall of the housing.

[0012] Preferably, the other end of the adjustment tube away from the sealing disc is connected to one end of a spring, and the other end of the spring is connected to the mounting ring, and the side wall of the mounting ring is connected to the inner wall of the fixed tube.

[0013] Preferably, the belt body is slidably matched with the through groove on the side wall of the housing.

[0014] Preferably, a seat belt applicable to the high-strength seat belt energy absorption device described in any one of the above includes: a polyester protective layer, a rubber tube, an inflation cavity, an elliptical exhaust hole and a retaining strip. The material of the belt body is specifically rubber. An inflation cavity is formed within the belt body. Two rubber tubes are arranged within the inflation cavity. The top and bottom of the rubber tube are respectively connected to the two inner walls of the inflation cavity. A plurality of elliptical exhaust holes are formed on the side wall of the rubber tube. The short axis of the elliptical exhaust hole is parallel to the direction of vehicle travel, and the elliptical exhaust hole faces the middle of the inflation cavity. A plurality of retaining strips are connected to the rubber tube. The retaining strips are arranged in one-to-one correspondence with the elliptical exhaust holes, and the bottom of the retaining strip is collinear with the long axis of the elliptical exhaust hole. The outside of the belt body is coated with a polyester protective layer. The end side wall of the polyester protective layer is hermetically connected to the inner wall of the second through groove formed on the outer tube, and the other end of the polyester protective layer is connected to the tongue.

[0015] The beneficial effects of the present invention are as follows:

[0016] A buffer component is arranged inside the device. The buffer component cooperates with the spiral spring. After an impact occurs, the spiral spring absorbs the energy of a part of the impact force, and the buffer component absorbs the energy of the other part of the impact force, improving the safety of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 It is a cross-sectional view of the fixed pipe of the present invention;

[0019] Figure 3 It is a schematic diagram of the connection relationship between the air supply member and the air guide pipe of the present invention;

[0020] Figure 4 It is a schematic diagram of the opening position of the horizontal adjustment groove on the adjustment pipe of the present invention;

[0021] Figure 5 It is a schematic diagram of the meshing relationship between the small gear and the toothed ring of the present invention;

[0022] Figure 6 It is a schematic diagram of the meshing connection relationship between the rack and the second gear of the present invention;

[0023] Figure 7 It is a schematic diagram of the starting position of the inflation chamber of the belt body of the present invention;

[0024] Figure 8 It is a schematic diagram of the opening position of the elliptical exhaust hole on the rubber hose of the present invention;

[0025] Figure 9 It is a schematic diagram of the relative position relationship between the elliptical exhaust hole and the retaining strip of the present invention;

[0026] Figure 10 It is a schematic diagram of the meshing connection relationship between the bevel gear and the second bevel gear of the present invention;

[0027] Figure 11 It is a schematic diagram of the opening position of the second through groove of the present invention.

[0028] Wherein: housing 1, fixed pipe 2, outer pipe 3, spiral spring 4, belt body 5, retaining ring 6, sealing ring 7, sealing cavity 8, air supply member 9, air guide pipe 10, adjustment pipe 11, exhaust groove 12, horizontal adjustment groove 13, sealing disc 14, pressure relief pipe 15, small gear 16, toothed ring 17, air pump 18, intake pipe 19, spring 20, mounting ring 21, rubber hose 22, inflation chamber 23, elliptical exhaust hole 24, retaining strip 25, second through groove 26, rack 27, second gear 28, rotating shaft 29, bevel gear 30, second bevel gear 31, second rotating shaft 32, screw 33, locking hole 34, tension roller 35. DETAILED DESCRIPTION OF THE INVENTION

[0029] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0030] Embodiment 1: Refer to Figures 1 - 11 , a high-strength seat belt energy absorption device and a seat belt, comprising: a housing 1, a fixed tube 2, an outer tube 3, a torsion spring 4 and a belt body 5. The fixed tube 2 is connected inside the housing 1. The side wall of the fixed tube 2 is connected to the inner wall of the outer tube 3 through the torsion spring 4. The outer tube 3 is rotationally matched with the fixed tube 2. One end of the belt body 5 is connected to the outer tube 3. The belt body 5 is wound around the outer tube 3. A buffer assembly is connected inside the fixed tube 2.

[0031] The principle of the above solution is as follows:

[0032] Before the device is used, one end of the belt body 5 is connected to the outer tube 3 to complete the installation of the belt body 5. When the device is in use, the belt body 5 is pulled outwards from the housing 1. The other end of the belt body 5 is connected to the tongue of the seat belt. After the member sits down, the tongue is connected to the buckle. Both the buckle and the housing 1 are fixed inside the vehicle. After a collision occurs, the belt body 5 moves outwards from the housing 1 and drives the outer tube 3 to rotate. Before locking, the torsion spring 4 gradually tightens to absorb part of the impact force. At the same time, the buffer assembly is activated to absorb the other part of the impact force. After absorbing the impact force, the buffer assembly locks the fixed tube 2 and the outer tube 3 to limit the member. After the collision ends, the buffer assembly resets, and the torsion spring 4 resets to drive the outer tube 3 to rotate in the reverse direction and rewind the belt body 5 around the outer tube 3 to complete the use of the device.

[0033] The beneficial effects of the above solution are as follows:

[0034] A buffer assembly is provided inside the device. The buffer assembly cooperates with the torsion spring 4. When a collision occurs, the torsion spring 4 absorbs part of the impact energy, and the buffer assembly absorbs the other part of the impact energy, improving the safety of the device during use.

[0035] Embodiment 2: Refer to Figures 1 - 11 , both side walls of the outer tube 3 are connected to the inner wall of a retaining ring 6 respectively, and the belt body 5 is arranged between the two retaining rings 6.

[0036] The principle of the above solution is as follows:

[0037] The belt body 5 is arranged between the two retaining rings 6. The retaining rings 6 are connected to the side wall of the outer tube 3. When the outer tube 3 rotates, the retaining rings 6 limit the belt body 5.

[0038] The beneficial effects of the above solution are as follows:

[0039] By providing the retaining rings 6 to limit the belt body 5, it is possible to prevent the belt body 5 from being misaligned during winding or release, and further prevent the belt body 5 from getting stuck inside the housing 1.

[0040] Example 3: Refer to Figures 1 - 11 , both side walls of the fixed pipe 2 are respectively connected to the inner wall of a sealing ring 7, the outer pipe 3 is rotatably connected between the two sealing rings 7, a sealing cavity 8 is formed among the sealing ring 7, the fixed pipe 2 and the outer pipe 3, and the coil spring 4 is arranged in the sealing cavity 8.

[0041] The principle and beneficial effects of the above solution are as follows:

[0042] The coil spring 4 is arranged in the sealing cavity 8, and the sealing cavity 8 is composed of the sealing ring 7, the fixed pipe 2 and the outer pipe 3. Therefore, the coil spring 4 placed in the sealing cavity 8 will not be affected by dust in the external environment, and thus dust accumulation will not occur inside the coil spring 4. Further, it will not cause the accumulation of dust inside the coil spring 4 to affect its curling and releasing.

[0043] Example 4: Refer to Figures 1 - 11 , the buffer assembly includes: an air supply member 9 and an air guide pipe 10. The air supply member 9 is connected to the inner wall of the housing 1, the end of the air guide pipe 10 is connected to the air supply member 9, the air guide pipe 10 is connected to the fixed pipe 2, and the other end of the air guide pipe 10 is connected to the inner wall of the sealing cavity 8.

[0044] The buffer assembly further includes: an adjustment pipe 11, an exhaust groove 12, a transverse adjustment groove 13 and a driving member. A sealing disc 14 is connected to one end of the fixed pipe 2 facing the vehicle travel direction. An adjustment pipe 11 is slidably sealed in the fixed pipe 2. Both ends of the adjustment pipe 11 are hermetically arranged. One end of the adjustment pipe 11 is connected to the driving member. An exhaust groove 12 is formed in the side wall of the adjustment pipe 11. The end of the exhaust groove 12 is coaxially arranged with the air guide pipe 10. The other end of the exhaust groove 12 is opened at the end of the adjustment pipe 11 and faces the sealing disc 14. Two opposite transverse adjustment grooves 13 are formed through the side wall of the adjustment pipe 11, and the transverse adjustment grooves 13 are arranged between the sealing ring 7 and the air guide pipe 10.

[0045] The end of a pressure relief pipe 15 is connected to the fixed pipe 2, the other end of the pressure relief pipe 15 faces the pinion 16 of the air supply member 9, an exhaust hole is formed in the housing 1, and a one-way valve is installed in the exhaust hole.

[0046] The principle and beneficial effects of the above solution are as follows:

[0047] When the belt body 5 is normally pulled, the air supply member 9 can input air into the exhaust groove 12 through the air guide pipe 10, and input it onto the pinion gear 16 of the air supply member 9 through the pressure relief pipe 15 connected to the fixed pipe 2, so that the pinion gear 16 can be cooled. The excess air is stored inside the housing 1. When the air pressure inside the housing 1 is relatively high, or when the ambient temperature is too high resulting in too high air pressure inside the housing 1, the excess air can be discharged through the one-way valve in the exhaust hole; when the belt body 5 is recycled, the air supply member 9 works in reverse, recycling the air inside the housing 1 through the pressure relief pipe 15 into the fixed pipe 2, entering the air guide pipe 10 through the exhaust groove 12, and discharging it outside the housing 1 through the air supply member 9;

[0048] When the vehicle is impacted, the driving member releases the adjusting pipe 11, and the adjusting pipe 11 moves in the vehicle traveling direction. The air guide pipe 10 ends the conduction with the exhaust groove 12 and conducts with the lateral adjusting groove 13. At this time, since the impact force of the member is transmitted to the belt body 5, the air supply member 9 is started again. The air supply member 9 inputs external air into the fixed pipe 2 through the air guide pipe 10. When the impact force is small, the conduction area between the lateral adjusting groove 13 and the air guide pipe 10 is small, and the volume of air output by the air supply member 9 into the adjusting pipe 11 is small. The air in the adjusting pipe 11 enters the sealing cavity 8 through another lateral adjusting groove 13, and the sealing cavity 8 temporarily stores the relatively small volume of air; when the impact force is large, the conduction area between the lateral adjusting groove 13 and the air guide pipe 10 is large, and the volume of air output by the air supply member 9 into the adjusting pipe 11 is large. The air in the adjusting pipe 11 enters the sealing cavity 8 through another lateral adjusting groove 13, and the sealing cavity 8 temporarily stores the relatively large volume of air;

[0049] While the air supply member 9 is starting, the belt body 5 is pulled by the impact force of the member. During this process, pulling the belt body 5 outside the housing 1 can buffer the impact force. After the air supply member 9 works for a period of time, the driving member locks the fixed pipe 2 and the outer pipe 3, thereby preventing the belt body 5 from releasing too long a length and avoiding the member from hitting the interior of the vehicle;

[0050] Members of different weights receive different impact forces from the belt body 5 under the same impact force of the vehicle. Also, since the conduction area between the lateral adjusting groove 13 and the air guide pipe 10 is the same, when the member's weight is relatively light, the number of rotation turns of the outer pipe 3 is small, that is, the length of the released belt body 5 is short, and the member can be quickly fixed while buffering; when the member's weight is relatively large, the number of rotation turns of the outer pipe 3 is large, that is, the length of the released belt body 5 becomes relatively longer, which can prevent the belt body 5 from not exerting enough buffering force on the member.

[0051] Example Five: Refer to Figures 1 - 11, the air supply member 9 further includes: a toothed ring 17, an air pump 18, and an intake pipe 19. A toothed ring 17 is connected to the retaining ring 6 facing the vehicle traveling direction. The toothed ring 17 is meshed and connected with a pinion gear 16. The pinion gear 16 is connected to the input shaft of the air pump 18 connected inside the housing 1. One side of the air pump 18 is connected to the end of the air guide pipe 10, and the other side of the air pump 18 is connected to the end of the intake pipe 19. The other end of the intake pipe 19 is placed outside the side wall of the housing 1.

[0052] The other end of the intake pipe 19 placed outside the side wall of the housing 1 is connected with a filter screen.

[0053] The diameter of the toothed ring 17 is larger than that of the pinion gear 16.

[0054] The principle and beneficial effects of the above solution are as follows:

[0055] When the vehicle is impacted, the belt body 5 is pulled, the retaining ring 6 rotates, and the toothed ring 17 rotates synchronously. The meshed pinion gear 16 rotates in reverse. The pinion gear 16 drives the input shaft of the air pump 18 to rotate. Then, the outside air enters the intake pipe 19 through the filter screen, enters the inside of the air guide pipe 10 through the air pump 18, and finally enters the inside of the sealing cavity 8.

[0056] After the impact ends, the belt body 5 is recovered. The retaining ring 6 rotates in the reverse direction, and the toothed ring 17 rotates synchronously in the reverse direction. The meshed pinion gear 16 rotates forward. The pinion gear 16 drives the input shaft of the air pump 18 to rotate. Then, the air in the sealing cavity 8 enters the intake pipe 19 through the air guide pipe 10 and the air pump 18, and finally is discharged outside the housing 1 through the filter screen.

[0057] Since the diameter of the toothed ring 17 is larger than that of the pinion gear 16, when the belt body 5 is normally pulled, the pinion gear 16 rotates more turns, and the amount of air supplied by driving the air pump 18 is more. However, the heat generated during its operation is also more. To prevent its damage, the pinion gear 16 can be cooled through the pressure relief pipe 15 to prevent the phenomenon of overheating.

[0058] And when the belt body 5 is recovered, the air stored in the housing 1 can be discharged again through the pressure relief pipe 15. Therefore, the flowing air at the pressure relief pipe 15 can cool the pinion gear 16 again, so as to ensure that the pinion gear 16 can be cooled whether it rotates forward or backward.

[0059] The cooperation of the pressure relief pipe 15 and the exhaust groove 12 can prevent the phenomenon of too high air pressure in the air pump 18 when the belt body 5 is working normally, and further avoid its damage.

[0060] The setting of the sealing disc 14 can ensure that the air in the pressure relief pipe 15 can be input to the pinion gear 16 and quickly cooled when the vehicle is not impacted.

[0061] Example six: Refer to Figures 1 - 11, the other end of the adjusting pipe 11 away from the sealing disc 14 is connected to the end of a spring 20, the other end of the spring 20 is connected to a mounting ring 21, and the side wall of the mounting ring 21 is connected to the inner wall of the fixed pipe 2.

[0062] The belt body 5 is in sliding fit with the through groove on the side wall of the housing 1.

[0063] The end of the adjusting pipe 11 away from the sealing disc 14 is connected to the end of a rack 27, the rack 27 is meshed and connected with a second gear 28, the second gear 28 is rotationally connected to a rotating shaft 29, the rotating shaft 29 is rotationally connected to the fixed pipe 2, the end of the rotating shaft 29 outside the fixed pipe 2 is connected to a bevel gear 30, the bevel gear 30 is meshed and connected with a second bevel gear 31, the second bevel gear 31 is connected to the end of a second rotating shaft 32, the second rotating shaft 32 is rotationally connected to the side wall of the fixed pipe 2, the other end of the second rotating shaft 32 is in sliding connection with the end of a screw rod 33, the screw rod 33 is threadedly connected to the side wall of the fixed pipe 2, a plurality of locking holes 34 are circumferentially arrayed on the side wall of the retaining ring 6 away from the sealing disc 14, and the locking holes 34 are arranged towards the other end of the screw rod 33.

[0064] An unlocking hole is opened on the side wall of the housing 1, the inner wall of the unlocking hole is connected to the side wall of a rubber sealing ring, and the inner wall of the rubber sealing ring is hermetically connected to the side wall of an unlocking sealing plate.

[0065] The principle and beneficial effects of the above solution are as follows:

[0066] After the impact occurs, the belt body 5 is pulled out, the adjusting pipe 11 moves in the direction of vehicle travel, the spring 20 is stretched, synchronously the rack 27 moves to drive the second gear 28 meshed with it to rotate, the second gear 28 drives the rotating shaft 29 to rotate, the rotating shaft 29 drives the bevel gear 30 to rotate, the bevel gear 30 drives the second bevel gear 31 meshed with it to rotate in the opposite direction, the second bevel gear 31 drives the second rotating shaft 32 to rotate in the opposite direction, under the cooperation of the sliding connection of the second rotating shaft 32 and the threaded connection of the side wall of the fixed pipe 2, the screw rod 33 extends in the direction of vehicle travel and is inserted into a locking hole 34, ending the rotation of the outer pipe 3;

[0067] To reset the device, at this time, the unlocking sealing plate is removed, and a member or the driver can put their hand into the housing 1 and rotate the rotating shaft 29 in the opposite direction by hand. The reverse rotation of the bevel gear 30 drives the second bevel gear 31 meshed with it to rotate in the positive direction. Under the cooperation of the sliding connection of the second rotating shaft 32 and the threaded connection of the side wall of the fixed pipe 2, the screw rod 33 moves in the opposite direction, ending the plug-in fit with the locking hole 34. Under the action of the reset of the torsion spring 4, the outer pipe 3 rotates in the opposite direction and retracts the belt body 5. At the same time, the reverse rotation of the rotating shaft 29 drives the second gear 28 to rotate in the reverse direction, and the rack 27 meshed with it moves in the reverse direction, and the spring 20 shortens to reset the adjusting pipe 11, preparing for the next use of the device;

[0068] The insertion and cooperation between the screw 33 and the locking hole 34 can quickly lock the belt body 5 to prevent members from being injured. Since the outer tube 3 can rotate during the locking process of the screw 33 and the locking hole 34, the belt body 5 has sufficient time to buffer the impact force on the members, which can not only ensure that the members are not injured, but also prevent the phenomenon of secondary injury to the members by absorbing the energy during the impact.

[0069] Embodiment Seven: Refer to Figures 1 - 11 , a seat belt, applicable to a high-strength seat belt energy absorption device described in any one of the above, including: a polyester protective layer, a rubber tube 22, an inflation chamber 23, an elliptical exhaust hole 24 and a retaining strip 25. The material of the belt body 5 is specifically rubber. An inflation chamber 23 is opened in the belt body 5. Two rubber tubes 22 are arranged in the inflation chamber 23. The top and bottom of the rubber tube 22 are respectively connected to the two inner walls of the inflation chamber 23. A plurality of elliptical exhaust holes 24 are opened on the side wall of the rubber tube 22. The short axis of the elliptical exhaust hole 24 is parallel to the vehicle driving direction, and the elliptical exhaust hole 24 is arranged towards the middle of the inflation chamber 23. A plurality of retaining strips 25 are connected to the rubber tube 22. The retaining strips 25 are arranged in one-to-one correspondence with the elliptical exhaust holes 24. The bottom of the retaining strip 25 is collinear with the long axis of the elliptical exhaust hole 24. The outside of the belt body 5 is covered with a polyester protective layer. The end side wall of the polyester protective layer is hermetically connected to the inner wall of the second through groove 26 opened on the outer tube 3. The other end of the polyester protective layer is connected to the tongue.

[0070] The two inner walls of the inflation chamber 23 are hermetically arranged. The open end of the rubber tube 22 passing through the polyester protective layer passes through the second through groove 26 and is placed inside the sealing chamber 8. The other end of the rubber tube 22 is sealed inside the inflation chamber 23.

[0071] The principle and beneficial effects of the above solution are as follows:

[0072] The outside of the belt body 5 is covered with a polyester protective layer, which has strong wear resistance and can protect the belt body 5 made of rubber. When an impact occurs, the belt body 5 can buffer the impact. On this basis, the belt body 5 will move outward relative to the housing 1. Therefore, the air in the sealing chamber 8 can enter the inside of the rubber tube 22 through the second through groove 26, then enter the elliptical exhaust hole 24, and finally enter the inflation chamber 23. Therefore, after the impact occurs, the inflation chamber 23 placed outside the housing 1 can be inflated and expanded to further absorb energy and prevent members from being injured. The setting of the components in the device can absorb the energy during the impact multiple times, thereby ensuring the safety of the members;

[0073] When the inflatable cavity 23 is inflated, to prevent waste of air and jamming of the belt body 5, the minor axis of the elliptical exhaust hole 24 located in the spiral part of the belt body 5 is under pressure, the opening area of the elliptical exhaust hole 24 decreases, and synchronously, since the retaining bar 25 moves downward after being pressed, the belt body 5 located in the spiral part of the belt body 5, that is, inside the outer shell 1, is sealed. Since the rubber tube 22 is a tubular structure, although its spiral part is under a certain pressure, there is still a channel for air circulation inside, so as to ensure that air can smoothly enter the inside of the inflatable cavity 23 to complete the inflation process;

[0074] When the device is unlocked and reset, that is, when the belt body 5 is retracted into the outer shell 1, the thickness of the spiral part of the belt body 5 located inside the outer shell 1 increases, and then the air in the inflatable cavity 23 is squeezed. The air inside can enter the rubber tube 22 through the open elliptical exhaust hole 24 and is finally discharged through the air inlet pipe 19 to prepare for the next inflation.

[0075] Example VIII: Refer to Figures 1 - 11 , two spring tops are connected to the top wall of the outer shell 1. The bottom of the spring is connected to the top of the bearing. The bearing is slidably connected to the inner wall of the outer shell 1. Each bearing is rotatably connected to one end of a tension roller 35. The tension roller 35 is in frictional engagement with the top of the polyester protective layer. Both ends of the tension roller 35 are placed between two rubber tubes 22.

[0076] The principle and beneficial effects of the above solution are as follows:

[0077] The top wall of the outer shell 1 is connected to the top of the bearing through a spring. The bearing is slidably connected to the inner wall of the outer shell 1. Therefore, when the polyester protective layer moves outward or inward of the outer shell 1, it will be under pressure from the tension roller 35. The rotational connection between the tension roller 35 and the bearing increases its guidance for the polyester protective layer and can apply a tension force to the polyester protective layer; since both ends of the tension roller 35 are placed between two rubber tubes 22, the tension roller 35 can assist in sealing the inflatable cavity 23 located inside the outer shell 1 by pressure, avoiding the phenomenon of insufficient inflation of the inflatable cavity 23 located outside the outer shell 1.

[0078] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and 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 illustrated examples here.

Claims

1. A high-strength seat belt energy absorption device, characterized in that, Comprising: A housing (1), a fixed pipe (2) is connected inside the housing (1), the side wall of the fixed pipe (2) is connected to the inner wall of an outer pipe (3) through a coil spring (4), the outer pipe (3) is rotationally matched with the fixed pipe (2), one end of a belt body (5) is connected to the outer pipe (3), the belt body (5) is wound around the outer pipe (3), and a buffer assembly is connected inside the fixed pipe (2).

2. The high-strength seat belt energy absorption device according to claim 1, characterized in that, Both side walls of the outer pipe (3) are respectively connected to the inner wall of a retaining ring (6), and the belt body (5) is arranged between the two retaining rings (6).

3. The high-strength seat belt energy absorption device according to claim 2, characterized in that, Both side walls of the fixed pipe (2) are respectively connected to the inner wall of a sealing ring (7), the outer pipe (3) is rotatably connected between the two sealing rings (7), a sealing cavity (8) is formed among the sealing ring (7), the fixed pipe (2) and the outer pipe (3), and the coil spring (4) is arranged inside the sealing cavity (8).

4. The high-strength seat belt energy absorption device according to claim 3, wherein The buffer assembly includes: an air supply member (9), the air supply member (9) is connected to the inner wall of the housing (1), one end of an air guide pipe (10) is connected to the air supply member (9), the air guide pipe (10) is connected to the fixed pipe (2), and the other end of the air guide pipe (10) is connected to the inner wall of the sealing cavity (8).

5. The high-strength seat belt energy absorption device according to claim 4, wherein, The buffer assembly further includes: an adjusting pipe (11), a sealing disc (14) is connected to one end of the fixed pipe (2) facing the vehicle traveling direction, the adjusting pipe (11) is slidably sealed inside the fixed pipe (2), both ends of the adjusting pipe (11) are hermetically arranged, one end of the adjusting pipe (11) is connected to a driving member, exhaust grooves (12) are formed in the side wall of the adjusting pipe (11), the ends of the exhaust grooves (12) are coaxially arranged with the air guide pipe (10), the other ends of the exhaust grooves (12) are opened at the end of the adjusting pipe (11) and face the sealing disc (14), and two opposite transverse adjusting grooves (13) are formed through the side wall of the adjusting pipe (11), and the transverse adjusting grooves (13) are arranged between the sealing ring (7) and the air guide pipe (10).

6. The high-strength seat belt energy absorption device according to claim 5, characterized in that, One end of a pressure relief pipe (15) is connected to the fixed pipe (2), the other end of the pressure relief pipe (15) faces a pinion gear (16) of the air supply member (9), an exhaust hole is formed in the housing (1), and a one-way valve is installed in the exhaust hole.

7. The high-strength seat belt energy absorption device according to claim 6, characterized in that, The air supply member (9) further includes: a toothed ring (17), the toothed ring (17) is connected to the retaining ring (6) facing the vehicle traveling direction, the toothed ring (17) is meshed and connected with the pinion gear (16), the pinion gear (16) is connected to the input shaft of an air pump (18) connected inside the housing (1), one side of the air pump (18) is connected to the end of the air guide pipe (10), the other side of the air pump (18) is connected to the end of an air inlet pipe (19), and the other end of the air inlet pipe (19) is placed outside the side wall of the housing (1).

8. An energy absorption device for a high-strength seat belt according to claim 6, characterized in that, The other end of the adjusting pipe (11) far from the sealing disc (14) is connected to one end of a spring (20), the other end of the spring (20) is connected to an installation ring (21), and the side wall of the installation ring (21) is connected to the inner wall of the fixed pipe (2).

9. The high-strength seat belt energy absorption device according to claim 7, wherein, The belt body (5) is slidably matched with a through groove on the side wall of the housing (1).

10. A seat belt, applicable to a high-strength seat belt energy absorption device according to any one of claims 1-9, characterized in that, Comprising: An inflatable cavity (23), the material of the belt body (5) is specifically rubber. An inflatable cavity (23) is formed inside the belt body (5). Two rubber tubes (22) are provided inside the inflatable cavity (23). The top and bottom of the rubber tubes (22) are respectively connected to the two inner walls of the inflatable cavity (23). A plurality of elliptical exhaust holes (24) are formed on the side wall of the rubber tubes (22). The minor axis of the elliptical exhaust holes (24) is parallel to the vehicle driving direction, and the elliptical exhaust holes (24) are arranged towards the middle of the inflatable cavity (23). A plurality of blocking strips (25) are connected to the rubber tubes (22). The blocking strips (25) are arranged in one-to-one correspondence with the elliptical exhaust holes (24). The bottom of the blocking strips (25) is collinear with the major axis of the elliptical exhaust holes (24). The outside of the belt body (5) is covered with a polyester protective layer. The end side wall of the polyester protective layer is hermetically connected to the inner wall of the second through groove (26) formed on the outer tube (3). The other end of the polyester protective layer is connected to the lock tongue.

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