KR19980024070A - Device for inflating airbag - Google Patents

Abstract

The present invention is a mechanical airbag operation mechanism, when the critical impact amount is more than a certain value, the impact detection ball is moved and the punching pin to drill the sealing portion of the pressure vessel and if the punching does not come out, that is, punching When the pin is plugged in, the gas is ejected. The movement direction of the impact sensing ball and the drilling pin is the same, and the impact sensing ball and the drilling pin are positioned very close together, and the head of the drilling pin drills the hole while cutting the sealing portion of the pressure vessel crosswise or cutting the Y shape. It is manufactured in such a way that once the sealing portion is cut in the cross shape or Y-shaped, the compressed gas of the pressure vessel can be ejected as it is even when the drilling pin is inserted.

The apparatus holds a pressure vessel, a puncture pin for breaking the seal of the pressure vessel, an impact sensing ball for hitting the puncture pin to advance the perforation pin to break the seal, and the impact sensing ball. The impact sensing ball holding means for moving the impact sensing ball when an impact of more than the impact amount is applied, the sealing portion, the punching pin, the impact sensing ball, and the impact sensing ball holding means of the pressure vessel are arranged in one direction, The impact sensing ball holding means comprises a pusher holding the impact sensing ball and an acceleration spring for imparting acceleration force to the impact sensing ball when the impact sensing ball starts to move.

Description

Device for inflating airbag

The present invention relates to an actuating mechanism for inflating an airbag, and more particularly, to an apparatus for puncturing the inlet of a compressed gas container storing gas injected into the airbag to inflate the airbag.

In order to secure the occupant's stability in the event of a car crash, many airbag devices are used. This airbag device protects the occupant by causing the airbag to inflate in the event of an impact over a certain intensity. This airbag device is an electronic system that electronically performs a series of processes of inflating the airbag by detecting the degree of impact over a certain value, and mechanically perforates the gas pressure vessel to generate a high pressure gas into the airbag when an impact caused by a certain speed or more is generated. There is a mechanical one to send.

Mechanical airbag actuating mechanism has an impact protection device of domestic patent application 90-2187 (91-15452) published in 1991.9.30. There is a safety device for occupant protection by the airbag of the publication number 93-4515.

The specification of these prior arts, that is, the airbag apparatuses of Publication Nos. 91-15452 and Publication Nos. 93-4515, are incorporated herein by reference.

Previously, this airbag device uses one pressure vessel to supply inflation gas to one airbag, and uses weights and actuating links to detect impacts. It is configured to inflate the air bag by releasing the lock and releasing the lock and rotating it with spring force to advance the punch pin like a cam to destroy the sealing inlet of the pressure gas container and release the pressure gas filled therein. It is.

In the conventional airbag actuator configured as described above, when the weight is advanced, the operating lever moves, so that the operator releases the locked state so that the operator rotates, and when the operator rotates, the punching pin moves in a linear motion. When the pin punches the sealing inlet of the pressure vessel and backs by the spring force, the compressed gas is ejected from the pressure vessel and supplied to the airbag. Therefore, it takes a lot of time because the interlocking motion of several elements is required until the weight starts to move and the compressed gas is ejected.

Since car accidents occur at the moment, it is required to minimize the time from moving the weight to supplying gas to the airbag.

The present invention provides a configuration for minimizing the time from the movement of the impact detection ball to detect a collision to the gas ejection from the pressure vessel, and additionally installing one or more compressed gas containers at the same time operating the driver's seat and passenger seat We want to be able to install side airbags.

Principle of the present invention is that when the amount of critical impact applied to the device is more than a certain value, the impact detection ball is moved and the punching pin is moved to puncture the sealing portion of the pressure vessel and the punching pin does not come out, that is, When the drilling pin is inserted, the gas is ejected as it is. The movement direction of the impact sensing ball and the drilling pin is the same, and the impact sensing ball and the drilling pin are positioned very close together, and the head of the drilling pin drills the hole while cutting the sealing portion of the pressure vessel crosswise or cutting the Y shape. It is manufactured in such a way that once the sealing part is cut in a cross shape, the battery or Y shape is cut so that the compressed gas of the pressure vessel can be ejected as it is even when the puncture pin is inserted.

The device is configured to release a compressed gas for inflating an air bag when an impact greater than a critical impact amount is generated, the pressure vessel sealing and filling the compressed gas as a seal, and a puncture pin for breaking the seal of the pressure vessel. And a shock sensing ball for advancing the puncture pin striking the punch pin to break the sealing portion, and an impact sensing ball holding means for moving the impact sensing ball when the impact sensing ball is caught while holding the impact sensing ball. And a sealing part of the pressure vessel, a drilling pin, an impact sensing ball, and an impact sensing ball holding means are arranged in one direction, and the impact sensing ball holding means holds the impact sensing ball; When the shock detection ball is started to move comprises an acceleration spring for imparting an acceleration force to the impact detection ball.

The perforated pin 20 is a head having a + -shaped or Y-shaped blade, an intermediate part having a cross-sectional area smaller than the cross-sectional area of the head, and a root guided by a guide bush and applied by a shock sensing ball. It has a structure that, once drilled, has a structure in which compressed gas is released even if the drill is not reversed.

The impact sensing ball holding means is defined so that the impact sensing ball is moved only in a predetermined direction, and the cylinder supports the stretching force of the acceleration spring to coincide with the movement direction, the acceleration spring covered with one end of the cap, and One end is rotatably coupled to the pin, the pusher for applying a force to the impact detection ball to suppress the movement of the impact detection ball, and the cap and the inclined surface is coupled to the slope by the acceleration spring force toward the impact detection ball It comprises a suppressor lever integrally formed with a pulling portion for generating a pulling force, the jungle portion may be composed of a small ball protruding in the impact sensing ball moving passage.

1 is an exploded perspective view illustrating an apparatus for inflating an airbag as a first embodiment of the present invention

2 is a cross-sectional view for explaining a first embodiment of the present invention.

3 is a cross-sectional view for explaining a second embodiment of the present invention.

4 is a cross-sectional view for explaining a third embodiment of the present invention.

Figure 5 is a cross-sectional view for explaining in detail the portion connected to the pressure vessel of the present invention

6 is a cross-sectional view for explaining a fourth embodiment of the present invention.

7 is an exploded perspective view for explaining the fourth embodiment of the present invention;

The first embodiment of the present invention is as shown in FIGS. 1 and 2.

The airbag inflation device of the present invention comprises an impact sensing unit, a puncture pin, a pressure vessel filled with a compressed gas, and a case or cover for supporting and protecting them.

The impact sensing unit is composed of an impact sensing ball 11 and the impact sensing ball holding means. When the shock sensing ball holding means is held by the suppression spring 12 to suppress the movement of the shock sensing ball, and a force greater than or equal to the critical impact amount acts on the shock sensing ball, that is, when the force greater than the suppression force of the suppression spring 12 is small. The impact sensing ball is released from the suppression of the suppression spring and moves in the direction of the force acting on the impact sensing ball. The critical impact amount means an impact amount at which the impact sensing ball breaks through the movement restraint of the impact sensing ball holding means and starts moving forward.

In order to increase the suppression force of the suppression spring 12, the pressing plate 16 having a concave surface with the same curvature as the spherical surface of the impact sensing ball 12 is integrally coupled to the impact sensing ball 11 side end of the suppression spring 12, The other end of the suppression spring 12 is coupled to the cylinder 17 with screws 15. The cylinder 17 is made of a cylindrical pipe having a considerable thickness, and the inside of the pipe is partially scraped off to form a large inner diameter, and a hole is formed in a required place, and a rear plate is attached to the rear to form a single body. The shock sensing ball 11 is inserted in the inlet side of the cylinder which has a large inner diameter, and the acceleration spring 13 is contained in the part which has a small inner diameter. At an end opposite to the end of the acceleration spring 13 which meets the impact sensing ball, an adjustment screw 14 for adjusting the compression force of the acceleration spring is provided between the acceleration spring and 18 between the acceleration springs. The cylinder 17 is attached to the case with screws or the like.

The drilling pins 20 of this embodiment are shaped like a mountain to drill two pressure vessel seals. If there is a guide 21 in the center and the left pin 22 and the right pin 23 on the left and right, they are all formed integrally with the connecting plate 24. A sharp blade is formed on the head of the left pin and the right pin, and the shape of the blade is a + shape or a Y shape. Even if the Y-shape, evenly spaced about 120 degrees between each blade is balanced. The cross-sectional areas of the perforated pin heads 22a and 23a are larger than the cross-sectional areas of the middle portions 22b and 23b. Thus, the hole through the head can make a gas passage hole around the middle part.

The drilling pin 20 is pushed toward the cylinder by a spacing spring 25 having a weak force and is in contact with the end of the cylinder, and the guide 21 and the left pin 22 and the right pin 23 are connected to the connector 30. Guided by the guide hole 31 and the left bushing 32 and the right bushing 33, while the position is determined and installed.

The connecting body 30 is fixedly installed in the case 10 with screws or the like, and the guide hole 31 is drilled, and both sides of the connector 30 are penetrated with a toll. This male passage is a passage through which the puncture pin and the compressed gas move, and the left or right bushes 32 and 33 are screwed to the portion where the puncture pin is coupled, and two pressure vessels 41 and 42 filled with the compressed gas on the opposite side. Is connected to the compressed gas passage by the left coupling screw 43 and the right coupling screw 44, respectively. The vessel inlet of the pressure gas is sealed by sealing windows 45 and 46. The compressed gas passage has three entrances, and the two entrances are combined with a bush for guiding the drilling pin and a coupling screw for coupling the pressure vessel as described above, and the other entrance for supplying the compressed gas to the air bag. Supply pipes 46 and 47 are connected. In FIG. 5, the sealing portion of the pressure vessel is partially shown in detail in a state of being punctured by the puncturing pin.

The pressure vessels 41 and 42 are fixed by the case 10 and the lid (not shown).

The case 10 is set so that the direction in which the impact detecting ball 11 hits the punch pin 20 is the driving direction of the vehicle, that is, the pressure vessels 41 and 42 of the case are the front of the vehicle, and the vehicle body Attach with screws using attachment holes (5) in the appropriate place.

The operation of the device for inflating the airbag of the present invention configured as described above is as follows.

When the vehicle collides, the device for inflating the airbag in the direction of the arrow moves. In the normal driving operation of the vehicle, that is, forward, backward, rotation, stop, etc., the force of the spring 12 holding the impact sensing ball 11 is strong, so the impact sensing ball 11 does not move as if fixed. . The degree of impact force to which the impact detection ball 11 is moved away from the movement can be adjusted by adjusting the elastic force and the adjustment screw 14, such as the suppression spring 12 and the acceleration spring (13).

However, when the vehicle runs at a predetermined speed, for example, 40 km or more, and suddenly stops, or crashes, the momentum of inertia of the impact sensing ball 11 is so large that the force of the spring is overcome and the impact sensing ball is spring 12 ) Is pressed out of the pressing plate 16 to hit the punching pin 20. At this time, the shock sensing ball is accelerated by the acceleration spring 13 and hits the punch pin together with the force of the spring.

The punch pin 20 is advanced toward the pressure vessel by the impact of the impact sensing ball to penetrate through the sealing windows (45, 46) deeply.

When the drill pin enters the sealing window, the compressed gas in the pressure vessel is discharged between the hole formed in the seal window by the head of the drill pin and the middle of the drill pin, which is supplied to the airbag through the supply pipes 46 and 47. Delivered. Compressed gas delivered to the airbag is the same as the prior art to inflate the airbag.

Here, once the perforated pin 20 is advanced by the frictional force of the zero ring (22c, 23c) for gas sealing is not as advanced as it is. Alternatively, after the impact sensing ball 11 exits the pressing plate 16, the pressing plate 16 is returned to its original position, so that the latter half of the advanced impact sensing ball is caught by the pressing plate and cannot be moved back again. (20) may not be backwards and may remain forward.

3 shows the second embodiment, when the suppression spring 12 of the impact sensing ball holding means catches the impact sensing ball 11, as shown in the first embodiment, it does not hold and hold the pressing plate 16. There is a difference from the first embodiment to form a curved surface on the suppression spring 12 itself to catch the impact sensing ball 11, and the rest of the configuration is the same as the first embodiment as shown.

4 is a third embodiment of the present invention, in which the puncture pin 20 punctures the sealing portions of the pressure vessels 41 and 42, as in the first embodiment, and the impact sensing ball holding means of the impact amount sensing unit is slightly different. There is. In this example, the impact sensing unit is composed of an acceleration spring 51, an impact sensing ball 11, and axeleva 52. Here, the acceleration spring 51 also serves to accelerate by hitting the impact sensing ball, the restraining lever 52 serves to hold the force to be pushed by the impact sensing ball. The suppressing lever is formed in an F shape, and the root portion 54 coupled with the pin 53 at the bottom of the cylinder 17 and the impact sensing ball are pushed out of the cylinder 17 when the impact sensing ball is pushed. It has an outgoing jungle 56 and a pull 55 that is coupled with the suppression spring cap 57 so as not to open the lever. The end portion of the pull portion 55 is formed with a V-shaped groove, and the suppression spring cap 57 is formed with an inverted trapezoidal groove, so that an end with a V-shaped groove and a portion with an inverted trapezoidal groove are formed. Are combined. Since the suppression spring 51 pushes the cap 57 in the direction of the arrow X, the pull portion 55 of the suppressor lever 52 is also pushed in the direction of the arrow by the cap 57, and this force X is The inclined surface of the V-shaped groove of the pulling portion 55 and the inclined surface of the inverted trapezoidal groove of the suppression spring cap 57 are in contact with each other, resulting in a direction in which the pulling portion cannot be disengaged in the engaged state with the cap 57 (Y). ) Is working. That is, the force Y acting on the pulling portion changes according to the inclination of the V-shaped groove of the pulling portion 55 and the inclination of the inverted trapezoidal groove of the suppressing spring cap 57 and the magnitude of the suppressing spring force X. This force (Y) is the force of the impact detection ball by the interaction of the force (Y ') that the sliding portion 56 of the suppression lever 52 is pushed by the impact detection ball when the suppression lever is a certain value or more The impact sensing ball can no longer be suppressed, that is, the force (Y ') overcomes the force (Y) so that the pushing part of the suppressing lever is pushed so that the pulling part is released from the cap, and the impact sensing ball moves forward in the direction of the arrow. do. In this case, the impact sensing ball moves forward and the acceleration spring 51 strikes the rear of the impact sensing ball to add acceleration.

The structure and operation of the impact sensing ball to advance and break the sealing portion of the pressure vessel to release the compressed gas are as described in the first embodiment.

6 and 7 are cross-sectional and exploded perspective view for explaining the fourth embodiment of the present invention, the drilling pin 20 is to puncture the sealing portion of the pressure vessel (41, 42) as in the first embodiment, The impact sensing ball holding means of the impact amount sensing unit is slightly different. In this example, the impact sensing unit is composed of an acceleration spring 65, an impact sensing ball 11, and axeleva 62. Here, the acceleration spring (65) also serves to accelerate by hitting the impact sensing ball, the suppression lever 62 also serves to suppress the force to be pushed open by the impact sensing ball (11).

Suppression lever is formed in the shape of F, the back plate (67) of the cylinder 17, the groove 68 is formed and the root portion 69 coupled with the pin 64 and the impact sensing ball 11 is impacted when pushed It has a sliding portion 61 in contact with the sensing ball 11 to be pushed out of the cylinder 17 and a pulling portion 63 coupled with the suppression spring cap 66 so as not to open the lever. The jungle part 61 is combined with the impact detection ball 11 by a small ball 11 '. The impact detection ball and the jungle part 61 are brought into contact with each other by rolling contact with each other. It can be reduced to be seen as a preferred embodiment. An end portion of the pulling portion 63 is formed with a V-shaped groove, and a groove (or hole) having an inclined surface at an angle corresponding thereto is also formed in the suppression spring cap 66, so that the pulling portion having the V-shaped groove ( 63) The end and the grooved cap are combined. The angles of these inclined surfaces should be inclined such that when the force to extend the restraint spring acts on the cap 66, the pull portion 63 acts in the direction to be pulled toward the restraint spring. Since the suppression spring 65 pushes the cap 66 in the direction of the arrow X, the pull portion 63 of the suppressor lever 62 is also pushed in the direction of the arrow by the cap 66, and this force X is The inclined surface of the V-groove inclined surface of the pull portion 63 and the inclined surface of the groove of the suppression spring cap 66, and consequently, the direction in which the pulled portion 63 cannot be released in the engaged state with the cap 66 (Y ) Is working. That is, the force Y acting on the pulling portion changes according to the inclination of the V-shaped groove of the pulling portion 63 and the inclination of the groove of the suppressing spring cap 66 and the magnitude of the suppressing spring force. This force (Y) is suppressed when the force of the impact sensing ball becomes greater than a predetermined value by interaction with the force (Y ') of the pushing portion 61 of the suppression lever 62 by the impact sensing ball. The lever no longer restrains the forward movement of the impact sensing ball 11, that is, the force Y 'becomes greater than the force Y, and the pushing portion of the suppressing lever is pushed so that the pulling portion is released from the cap, and the impact sensing ball is released. Moves forward in the direction of the arrow. In this case, the impact sensing ball moves forward and the acceleration spring 51 strikes the rear of the impact sensing ball to add acceleration.

In addition, in order to reinforce the force (Y) so that the restraining lever is always restored to a normal state and quickly restored to the minor impact, a pin (73) is provided on the sliding part (61) of the restraining lever. Position one end of the auxiliary spring (75) on the other end of the auxiliary spring is coupled to the screw hole (77) formed in the cylinder with a bolt (76) so that the auxiliary spring pushes the sliding portion 61 of the impact sensing ball (11) Push firmly in the direction. This auxiliary spring (75) pushes the jungle in the same direction as the force Y, and the impact sensing ball raises the jungle by a small impact, so that the air bag is not immediately activated by a continuous small impact when the jungle is pushed out. Reinforce the role played.

The structure and operation of the impact sensing ball to advance and break the sealing portion of the pressure vessel to release the compressed gas are as described in the first embodiment.

Although there are many factors that determine the magnitude of the critical shock amount detected by the impact sensing unit, in addition to adjusting the mass of the impact sensing ball 11, the suppression spring 12 and the acceleration spring ( It is possible to adjust the force of 13 or by turning the adjusting screw 14. In addition, in the third and fourth embodiments, the critical shock amount can be determined by adjusting the force of the acceleration spring 51 and the position of the pulling portion. In particular, in the fourth embodiment, the critical shock amount can be adjusted by adjusting the elasticity and the fixed position of the auxiliary spring.

In this embodiment, although two air bags are used to expand two air bags at the same time, the structure is very economical. However, only one left pin or right pin of the punching pin is formed and only one pressure vessel is installed to inflate one air bag. Not only can it be used as a furnace, but if you install three or four pressure vessels and increase the punch pins to the number corresponding to the pressure vessels, you can install them with the side airbags on both sides of the front seat as well as the driver's seat and passenger seat.

As described above, the airbag inflation device of the present invention can minimize the time from the impact point of the vehicle to the airbag inflation time, thereby protecting the occupant safely, and is economical since it inflates two airbags into one device. That means you can install more than one airbag at a very affordable price, saving you money when buying a car.

Claims (7)

An apparatus configured to release compressed gas for inflating an air bag when an impact above a critical shock amount occurs, A pressure vessel which seals and fills compressed gas as a seal, Perforated pins for breaking the seal of the pressure vessel, An impact-sensing ball that strikes the puncture pin to advance the puncture pin to break the seal; Holds the impact detection ball and is provided with a shock detection ball holding means for moving the shock detection ball when the impact is greater than the critical impact amount, The impact sensing ball retracting means is inflated air bag comprising a pusher holding the impact sensing ball and an acceleration spring for imparting acceleration force to the impact sensing ball when the impact sensing ball starts to move. Device for making. The method of claim 1, The punch pin 20 is a head having a + -shaped or Y-shaped blade, an intermediate portion having a cross-sectional area smaller than the cross-sectional area of the head, and guided by a guide bush and subjected to a force by an impact sensing ball. Apparatus for inflating an airbag characterized by having a root portion. The method according to claim 1 or 2, The impact sensing ball holding means, A cylinder for limiting the impact detection ball to move only in a certain direction, and supporting the extending force of the acceleration spring to coincide with the moving direction; A cap covering the acceleration spring, One end of the cylinder is rotatably coupled to the pin, the pusher for applying a force to the impact detection ball to suppress the movement of the impact detection ball, and the cap and the inclined surface coupled to the impact by the acceleration spring force Apparatus for inflating an airbag, characterized in that it comprises a suppression lever is formed integrally with the pull portion for generating a force to pull toward the sensing ball. The method of claim 3, And the slide portion of the impact sensing ball holding means comprises a small ball protruding from the impact sensing ball moving passage. The method of claim 3, The impact sensing ball holding means is further provided with a secondary spring for applying a force to suppress the movement of the axial sensing ball by pushing the pin is formed on one end of the pin and the other end is fixed to the cylinder and the cylinder portion Apparatus for inflating an airbag characterized in that. The method according to claim 1 or 2, The impact sensing ball holding means, A cylinder for limiting the impact detection ball to move only in a predetermined direction and supporting the extending force of the acceleration spring to coincide with the moving direction; One side is fixedly coupled to one end of the cylinder, the device for inflating an airbag, characterized in that it has a suppression spring for applying a force to the impact sensing ball to suppress the movement of the impact sensing ball. The method of claim 6, The suppression spring is a device for inflating an airbag, characterized in that the pressing plate for applying a force to the impact sensing ball to suppress the movement of the impact sensing ball.