CN209938529U - Pre-tightening safety belt - Google Patents

Abstract

The utility model discloses a pre-tightening safety belt, which comprises a sensor, a power device, a tightening device, an anti-reverse structure, a safety belt and a mounting shell, wherein the sensor, the power device, the tightening device, the anti-reverse structure and the safety belt are all arranged in the mounting shell; the sensor is connected with an SRS safety airbag system, the power device comprises a piston, a heater for ignition, an ignition agent and a pushing agent, the ignition is carried out according to a signal of the sensor, the piston is pushed by the generated air pressure, and power for tensioning the safety belt is generated; the tightening device comprises a fixed gear and a movable gear, and the safety belt penetrates between the fixed gear and the movable gear; the anti-reverse structure comprises two mutually meshed anti-reverse rotation gears. The utility model discloses can prevent under the emergency that the car takes place again that the passenger from to the antedisplacement, tighten up the safety belt, play the guard action to the passenger.

Description

Pre-tightening safety belt

The technical field is as follows:

the utility model relates to a pretension formula safety belt.

Background art:

with the development of automotive technology, automobiles have been the vehicle of choice for many people, however, in many accidents, many drivers are irreparably lost because they are not belted. Therefore, it is very important to tie the safety belt, and the utility model provides a pretension formula safety belt.

Therefore, there is a need to improve the prior art to overcome the deficiencies of the prior art.

The utility model has the following contents:

the utility model provides a pretension formula safety belt for solving the problem that above-mentioned prior art exists.

The utility model discloses the technical scheme who adopts has: a pre-tightening safety belt comprises a sensor, a power device, a tightening device, an anti-reverse structure, a safety belt and a mounting shell, wherein the sensor, the power device, the tightening device, the anti-reverse structure and the safety belt are all arranged in the mounting shell;

the sensor is connected to the SRS airbag system,

the power device comprises a piston, a heater for ignition, an ignition agent and a pushing agent, the ignition is carried out according to signals of the sensor, the piston is pushed by the generated air pressure, and the power for tensioning the safety belt is generated;

the tightening device comprises a fixed gear and a movable gear, and the safety belt penetrates between the fixed gear and the movable gear;

the anti-reverse structure comprises two mutually meshed anti-reverse rotation gears.

The utility model discloses following beneficial effect has: the utility model discloses can prevent under the emergency that the car takes place again that the passenger from to the antedisplacement, tighten up the safety belt, play the guard action to the passenger.

Description of the drawings:

fig. 1 is a structural diagram of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the utility model relates to a pretension formula safety belt, its characterized in that: the safety belt retractor comprises a sensor, a power device, a tightening device, an anti-reverse structure, a safety belt 2 and an installation shell 1, wherein the sensor, the power device, the tightening device, the anti-reverse structure and the safety belt are all arranged in the installation shell.

The sensor is shared with the SRS airbag system. The pretensioned seat belt and the SRS airbag system are activated simultaneously when an impact from the front is detected to be higher than a predetermined value.

The power unit includes a piston and a heater for ignition, an ignition agent, and a propellant, which ignites upon a signal from a sensor. The generated air pressure is used to push a piston in the air cylinder, thereby generating power for tightening the safety belt. To the most important propellants in the pre-tensioning device are added ingredients with good heat resistance and durability.

The tightening device comprises a fixed gear and a movable gear, and the safety belt passes between the fixed gear and the movable gear and is not used normally to generate any resistance. The thrust generated by the power device after starting is converted into rotary motion through the pulley. Further, the movable gear rotates and pinches the webbing with the fixed gear, thereby tightening the webbing while rotating.

The anti-reverse structure comprises two mutually meshed anti-reverse rotation gears, and once the safety belt is tightened, the tension of the safety belt of a passenger can enable the anti-reverse rotation gears to be meshed and keep a meshed state. To prevent the reverse rotation reliably, the gears are engaged at 4 positions.

In the event of an impact, the pretensioner can tighten the belt to prevent displacement due to slack which could cause physical injury. After the impact is over, the force path limiter may loosen the seat belt slightly to relieve pressure on the occupant of the vehicle.

The action process is as follows: a probe is first responsible for collecting the crash information and then releasing an electrical pulse that is transmitted to a gas generator to detonate the gas. The gas produced by explosion expands rapidly in the pipeline and presses the ball chain, so that the ball flees forward in the pipeline to drive the ratchet disc to rotate. The pawl disc is connected with the uranium into a whole, and the safety belt is wound on the shaft. Simply speaking, the gas pressure makes the ball move, the ball drives the pawl plate to rotate, and the pawl plate drives the shaft to rotate, thus realizing the pre-tightening function of the safety belt instantly. The whole process from sensing an accident to completing the pre-tightening of the safety belt only lasts for a few thousandths of a second. The end of the pipeline is a section of cavity used for containing the rolled ball.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims (1)

1. A pretensioned seatbelt, comprising: the safety belt retractor comprises a sensor, a power device, a tightening device, an anti-reverse structure, a safety belt and a mounting shell, wherein the sensor, the power device, the tightening device, the anti-reverse structure and the safety belt are all arranged in the mounting shell;

the sensor is connected to the SRS airbag system,

the power device comprises a piston, a heater for ignition, an ignition agent and a pushing agent, the ignition is carried out according to signals of the sensor, the piston is pushed by the generated air pressure, and the power for tensioning the safety belt is generated;

the tightening device comprises a fixed gear and a movable gear, and the safety belt penetrates between the fixed gear and the movable gear;

the anti-reverse structure comprises two mutually meshed anti-reverse rotation gears.

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