KR19990025594A - Airbag system with built-in steering wheel - Google Patents

Abstract

The present invention simplifies the receiving means including the operating means and the airbag into a single set, enables the reuse of the operating means, and is detected by physical inertia when a shock over a predetermined speed is applied to the front side of the vehicle while driving. By operating the airbag system without power, the exhaust gas can be quickly supplied to the airbag, so that all vehicles shipped without an airbag system can be easily immersed and reused without a separate power source. The present invention relates to an airbag system with a built-in steering wheel that can achieve economic effects and maximize the effect of preventing injury applied to the driver by the frontal collision of the vehicle.

Description

Airbag system with built-in steering wheel

The present invention relates to an airbag system with a built-in steering wheel.

In general, the airbag system is a device that is built in the center of the steering wheel of the vehicle to protect the human life by releasing the airbag between the steering wheel and the driver in the event of a collision, such a conventional airbag system is a shock detection in front of the vehicle An apparatus is installed and an actuator configured to supply gas to the airbag is embedded in the center of the steering wheel.

In the conventional airbag system, when an impact sensor installed on the front of the vehicle detects the impact when the vehicle in front of the vehicle collides, the detection signal is transmitted to the operating unit to supply gas to the airbag, thereby providing the airbag between the steering wheel and the driver. Will be released.

Accordingly, the conventional airbag system is not only complicated in structure and increased in manufacturing cost as the shock sensor for detecting the shock applied to the vehicle is installed in front of the vehicle separately from the operation unit for operating the airbag, and especially in the electrical apparatus. If an error occurs or moisture is introduced into the shock sensor, the detection function malfunctions. Airbags are released even during normal operation of the vehicle, which may cause a problem in safe operation. There was an impossible problem.

Accordingly, the present invention has been made in view of the above-mentioned conventional defects. The object of the present invention is to simplify the structure, to enable reuse, and to release it by physical inertia when a shock at a predetermined speed or more is applied to the front side of the vehicle while driving. The present invention provides an airbag system with a built-in steering wheel to quickly supply supplied gas to an airbag.

The present invention for achieving the above object, the lower case is formed in the lower part of the frame connected to the inside of the steering wheel so that the installation space is formed in the lower portion of the center of the steering wheel, and the horn grounding sphere integrally with the steering wheel shaft connector, the lower Through the center of the case to form a connecting boss fastened to the lower portion of the frame center, the frame is formed inside the frame to receive the operation means and the air bag in sequence to form a storage box seated on the frame, the air bag The upper part is opened and closed by an opening / closing cover so as to be built in the upper part, and the airbag case is equipped with a horn button on both sides, and the opening of the opening / closing cover is opened on the upper part of the storage box in which the operation means and the air bag case are sequentially installed. Top to enable and secure the airbag case to the holder Receiving means configured the server and;

When a collision occurs on the front of the vehicle and a shock force is applied at a predetermined speed or more, the movable part is configured such that the free end of the other side rotates around the rotational fixed end of one side by collision inertia. And a support for releasing the hitting part that is being forcibly supported, and when the support force is released by the support, the support part rotates resiliently to strike the punching pin, and is interlocked by the hitting part to punch the inlet of the gas cylinder. Comprising the study, characterized in that consisting of the operating means built in the receiving portion by configuring the discharge portion for discharging the gas ejected from the gas cylinder punched by the perforator to the air bag in a balanced manner.

Hereinafter, the configuration and operation of an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side configuration view showing an operating state of the airbag system to which the present invention is applied

Figure 2 is an exploded perspective view of the receiving means and the operating means of the present invention

Figure 3 is a side cross-sectional view showing a combined state of the receiving means and the operating means of the present invention

Figure 4 is an exploded perspective view of the operating means of the present invention,

A is an exploded perspective view of the movable part and the support part

B is an exploded perspective view of the hitting part

C is a perspective view of the perforation and discharge

5 is a plan view of the airbag system operating means to which the present invention is applied

Figure 6 is a cross-sectional view taken along the line A-A of the present invention Figure 5

7 is a cross-sectional view taken along the line B-B of the present invention Figure 5

Explanation of symbols for the main parts of the drawings

10: accommodation means 11: steering wheel

12: Frame 13: Lower case

14: Connecting Boss 15: Box

16: Airbag Case 17: Top Cover

20: main base 30: operating means

40: movable part 50: support part

60: lifting operation part 70: hitting part

80: perforation 90: discharge

A: Airbag

1 is a side configuration view showing the airbag discharge state of the airbag system to which the present invention is applied, Figure 2 is an exploded perspective view of the receiving means of the present invention, Figure 3 is a side cross-sectional view showing a combined state of the receiving means and the operating means of the present invention. 4 is an exploded perspective view of the operating means of the present invention.

Air bag system to which the present invention is applied, the lower case 13 is coupled to the lower frame 12 in the center of the steering wheel (11); A connecting boss 14 penetrated through a lower portion of a center of the frame 12; A storage box 15 incorporating an operation means in the frame 12; An airbag case (16) for receiving the airbag (A) connected to the operation means (30) and mounting the upper portion of the storage box (15); Receiving means 10 of the upper cover 17 for integrally fixing the outside of the airbag case 16 to the storage box 15 is configured.

And when the collision occurs in the front of the vehicle is applied a shock force of a certain speed or more movable portion 40 to rotate the free end of the other side around the fixed rotation of one end by the collision inertia; A support part 50 for releasing the hitting part which is forcibly supported in connection with this when the free end of the movable part 40 descends; When the support force is released by the support unit 50, the impact unit 70 is rotated elastically hitting the punching pin 81; A perforation part 80 interlocked by the striking part 70 to perforate the inlet of the gas cylinder; Consists of the discharge means 90 for discharging the gas ejected from the gas cylinder 96 punctured by the puncturing portion 80 to the air bag in a balanced manner, the operation means 30 built in the receiving means, more Specifically, it is as follows.

First, an embodiment of the receiving means 10 will be described.

Frame 12 is bent so that the installation space is formed to a predetermined depth in the lower center of the steering wheel 11, through the boss installation hole 122 in the center of the fastening through a plurality of fastening holes 123 through the outer Plate 121 is provided.

The lower case 13 wraps around the outer edge of the frame 12 and is opened upward so that the installation space is not exposed, and fastening each corner of four directions to four corners of the frame 12 with screws.

The connecting boss 14 penetrates through the center of the lower case 13 and is in surface contact with the bottom surface of the fastening plate 121 at the center of the frame 12 and is inserted into the boss installation hole 122 at the center thereof and then fastened with a screw. Is provided with a connector 141, the connector 141 and a disk-shaped horn grounding earth 142 and the turn direction indicating earth 143 is integrally provided at a lower portion spaced apart.

The holder 15 is provided in a housing having a space having a depth and a width for accommodating the operation means 30 in the frame 12, and a predetermined length is extended outward on both sides in the longitudinal direction. The fixing piece 151 through which the fastening hole 152 is provided at the corner is provided.

The airbag case 16 has a rectangular space which is opened upward, a pair of through holes 161 are formed at the bottom thereof, and an installation piece 162 extending outwardly is provided at the middle of both sidewalls, and a rear end thereof is provided. The horn button 163 is mounted on the rear surface, and a plurality of protrusions 164 protrude from the rear side at a predetermined interval in the longitudinal direction. In addition, the opening and closing cover 165 is connected to the rear protrusion 164 of the air bag case 16 to open and close the opened upper surface.

The upper cover 17 is fastened in correspondence with the fixing piece 151 of the storage box 15 and the installation piece 162 of the airbag case 16, and the edge 171 is pressed to press the outside of the opening / closing cover 165. A rectangular opening / closing cover guide hole 172 is formed in the inner side of the edge 171 so that the opening / closing cover 165 of which the outer side is pressed by the discharge pressure of the air bag can be opened.

The following describes one embodiment of the actuation means 30.

The movable part 40 is pivotally arranged on the outer side of the support part 50 by a hinge 41, extends a predetermined length to the other side, and has a movable lever 42 having a locking hole 421 through the long hole at the center of one side thereof. It is comprised and the movable weight 43 of predetermined weight is provided in the other end bottom face of this movable lever 42. As shown in FIG.

As shown in FIGS. 4A and 6, the support part 50 has a bearing base 511 extending from one side end of the movable lever 42 to the hinge 41 on the outside thereof, and guides to the center of one side of the upper part. The ball 512 is through, the other side is provided with a seating groove 513, the bearing guide plate 514 with an inner surface perpendicular to the bottom of the bearing 511 is provided with a screw on the main base 20 The subbase 51 which is fastened and mounted is comprised. A spring 521 is seated in the mounting groove 513 of the sub base 51, and the guide pin 52 passes through the locking hole 421 of the movable lever 42 to be inserted into the spring 521. The lower end is fastened to the center of the mounting groove 513 of the sub base 51.

In addition, a pair of support bearings 531 are formed vertically in contact with the bearing guide plate 514 inside the vertical direction of the sub-base 51 to move up and down, and the locking bearing 532 is provided at the center of the other end thereof. The support bearing 531 and the locking bearing 532 are integrally formed by a fixed holder 53 divided into a pair so that a rectangular fixing hole 533 is formed in the center thereof.

And the lifting operation rod 54 of the diameter which can pass freely through the guide hole 512 of the sub base 51 is comprised. The elevating operation bar 54 is formed in a spherical upper end portion of the rod body, a key groove 541 is formed on the outer periphery of the upper end portion, the engaging piece extending outwardly in the lower portion spaced apart from the key groove 541 ( 542 is provided, and the lower portion of the locking piece 542 is assembled to a rectangular fixing hole 533 formed in the center of the fixing holder 53, so that the locking jaw 543 can be freely moved forward and backward, and the upper and lower clearances are caught. It is provided.

The elevating operating bar 54 passes from the lower portion of the guide hole 512 of the subbase 51 to catch the locking piece 542 on the bottom thereof, and the elevating operating bar 54 which has passed through the guide hole 512. Insert the spring (544) in the upper outer portion of the washer 545 is inserted into the top of the spring groove 541 to insert the spring pin 546 to fix the spring (544) does not escape to the top. The lower end of the elevating operation bar 54 assembled in the fixing hole 533 of the fixing holder 53 is inserted into the guide hole 22 vertically perforated in the main base 20.

Strike portion 70, as shown in Figures 4A, 4C and 5, 6, 7, forming a spring fixing jaw 742 on one side of the tip and cut the bearing catching jaw 744 on the other edge thereof The impact member 74 is formed by forming a striking end 743 curved from one side of the rear end to a predetermined position on the other side, and passing the shaft hole 741 of a predetermined diameter in the center of the striking end 743.

The first spring 71 and the second spring 72 are divided into two parts, spaced apart from each other by a predetermined interval so that the shaft hole 741 of the striking member 74 is located at the center thereof. It is composed. The first and second springs 71 and 72 are respectively integrated between the upper and lower locking projections 711 and 721 and the lower locking projections 712 and 722 upward and downward, respectively, and spaced apart vertically. Hooks 713 and 723 extending in one horizontal direction and connected to each other are provided.

In addition, the support base 72 is covered on the upper portion of the first and second springs 71 and 72, and the striking member 74 connected to the center of the first and second springs 71 and 72 is connected to the main base. The central axis 73 fixed to the 20 is comprised. The support cover 72 is formed in a plate shape so as to cover the upper portion of the first and second springs 71 and 72 and fix the central axis 73 so that the fixing hole 752 penetrates downward from the center of the bottom surface. The central shaft 73 has a diameter in which the shaft hole 741 of the striking member 74 is rotatably formed at a position spaced apart from the upper end by a predetermined interval, and the upper and lower ends thereof. To form a predetermined length step and to form a fastening hole (731) 732 to a predetermined depth on the upper end.

And when seeing the assembling process of the striking portion configured as described above, first insert the lower locking projections (712, 722) of the first and second springs (71, 72) to the main base 20, and formed in the center thereof The hook 713 and 723 are fixed to the fixing jaw 742 formed at the other end of the striking member 74, and then the main base boss 21 is passed through the central shaft 73 through the shaft hole 741. Insert the lower end of the central shaft 73 into the bearing hole 211 and fasten with a bolt 24 at the bottom of the main base 20 at the bottom of the boss 21. After the fastening is completed, the upper end of the central shaft 73 is inserted into the fixing hole 752 through the boss 751 of the support cover 72, and then the bolt 754 is fastened from the top of the support cover 72. Subsequently, the screw 755 is inserted into the through hole 753 on the other side to fasten with the fastening hole 231 of the fastening table 23 installed from the main base 20.

As shown in FIGS. 4B and 7, the perforation part 80 forms an end portion of the tip 811, which is the striking end of the perforation pin 81, into a curved sphere, and at an outer periphery at a position spaced apart therefrom. The engaging piece 812 on which the spring 82 is caught is formed integrally. In addition, the rear end 813, which is an insertion end formed on the other side of the perforated pin tip 811, consists of a pipe that is opened 814 in a backward direction, and forms an end thereof inclined from one side, and a plurality of radially perforated radially through the outer circumference thereof. To form a vent hole 815.

Discharge part 90 is a gas cylinder connection hole 911 to which the gas cylinder 96 is screwed and connected as shown in Figs. 4C and 7 and the perforation for embedding the drilling pin 81 to slide in the horizontal direction The pin guide hole 912 penetrates in the horizontal direction, and the gas guide hole 913 for guiding the discharge gas discharged from the gas cylinder 96 to the upper portion of the upper portion of the drilling pin guide hole 912 is vertically perforated. The connecting member 91 is configured to connect two gas cylinders 96 in parallel with each other, and a through hole 921 is formed at an upper center thereof, and a fastening member for fastening by screwing at four lower edges of the connecting member 91. 92 is configured.

In addition, an upper portion of the fastening member 92 has a gas diffusion case 93 for spreading the gas discharged in a balanced manner, and a gas injection member for connecting the gas diffusion case 93 to the connection member 91 to inject a gas. 94 and an upper cover 95 which guides the gas diffused from the gas diffusion case 93 to be discharged to the airbag and covers the upper portion of the gas diffusion case 93. This will be described in more detail as follows.

The gas diffusion case 93 is provided with a pair of diffusion chambers 931 which recesses the front and rear longitudinal directions of the rectangular plate body downward, and an installation hole 932 has a predetermined diameter at one side of the diffusion chamber 931. It is through.

In addition, the gas injection member 94 sequentially passes through the installation hole 932 of the gas diffusion case 93 and the through hole 921 of the fastening member 92, and thus the gas guide hole 913 of the connection member 91. The injection hole 941 inserted into the center is formed in the center and is provided with a fastening piece 942 connected outward on the upper part to be seated through the installation hole 932 of the gas diffusion case 93 and the lower part of the fastening piece 942. Fasten the screws by fastening them.

In addition, the upper cover 95 is provided with a gas discharge hole (951) through the long hole corresponding to the center of the diffusion chamber 931 in front and rear of the same plate body as the upper area of the gas diffusion case 93, this gas discharge The inside of the hole 951 is provided with a guide plate 952 for guiding the gas in different directions to prevent the gas from colliding with each other, the air bag (A) is attached to the periphery of the gas discharge hole (951) An airbag attachment line 953 is formed. The upper cover 95 is covered with an upper portion of the gas diffusion case 93 and seated inside the air bag case 16 as shown in FIG. 7, and then assembled by a screw 954.

The following describes the operation of the present invention in detail as described above.

First, the operation state of the operation unit 30 is rotated the striking member 74 as shown in Figure 5 so that the first and second springs 71 and 72 are wound, then the locking bearing of the support 50 ( 532 hangs the locking groove 744 of the striking member 74 to be forcibly supported.

In addition, the strong pressing force generated from the striking member 74 installed on the first and second springs 71 and 72 does not interfere with the elevating operation bar 54, and the support bearing 531 and the locking bearing 532 are connected to each other. The fixing holder 53 is moved to the other side. That is, the fixing hole 533, which is long in the center of the fixing holder 53 around the locking jaw 543 of the elevating operation bar 54, slides to the other side in the longitudinal direction and is applied from the striking member 74. Losing pressing force moves only the fixed holder 53 without interfering with the elevating operation bar 54. At this time, the pair of support bearings 531 disposed up and down the outer side of the fixed holder 53 is in close contact with the inner surface of the bearing guide plate 514 formed in the subbase 51, so that the elevating operating rod 54 By maintaining the vertical state, the support can be stably supported so that the lifting movement can be performed smoothly.

As such, when the striking member 74 is caught by the locking bearing 532 of the support unit 50 and forcedly supported, another vehicle or an obstacle collides with the front of the driving vehicle to generate an impact force (about 40 km / h) above a predetermined value. 6, the movable weight 43 of the movable portion 40 rotates in the collision direction and presses the elevating operating rod 54 in close contact with the bottom surface of the movable lever 42, as shown by the dashed-dotted line in FIG. 6. Let's go.

When the lifting operation bar 54 is lowered in this way, the fixing holder 53 assembled to the lifting operation bar 54 is lowered vertically by interlocking with the locking bearing 532 provided at the front of the fixing holder 53. It descends below the bottom of the striking member 74 and is separated from the locking jaw 744 of the striking member 74. In this case, the support bearing 531 slides vertically along the inner surface of the bearing guide plate 514 of the subbase 51.

When the locking bearing 532 is vertically lowered to release the locking state of the striking member 74 through the above process, the first and second springs 71 and 72 are elastically installed in the striking member 74. As the force is restored, the striking member 74 rotates in one direction about the central axis 73 as shown by the double-dot chain line in FIG. 5, and the striking end 743 quickly moves the tip of the punching pin 81. Strike with strong force.

In this case, as shown in FIG. 7, the inclined end of the rear end 813 is inserted through the inlet made of the thin plate of the gas cylinder 96 as shown in FIG. 7, and the gas filled in the gas cylinder 96 is the opening of the tip. 814 is discharged to the vent hole 815 through the outer periphery, and then the progress of the striking member 74 is completed to restore the restoring force of the spring 82 and the discharge gas in the drilling pin 81 When the drilling pin 81 is returned by the pressure and the inlet of the gas cylinder is completely opened, the gas passes through the injection hole 941 of the gas injection member 94 connected thereto via the gas guide hole 913 of the connecting member 91. It is discharged to the diffusion chamber 931 of the gas diffusion case 93.

The gas injected into the diffusion chamber 931 through the above process is diffused in the longitudinal direction and is discharged through the gas discharge hole 951 of the upper cover 95 covered thereon, and thus discharged in opposite directions. By discharging along the guide plate 952 protruding obliquely to the gas discharged from the two directions do not collide with each other to quickly inflate the airbag (A).

The inflated airbag (A) is forcibly open to the opening and closing cover 165 covered in the airbag case 16 and at the same time as quickly discharged between the steering wheel 11 and the front of the driver as shown in FIG. By forming a buffer barrier between the steering wheel 11 and to minimize the injury of the driver.

Meanwhile, the airbag system of the present invention operated by the collision of the vehicle as described above separates the operation means 30 from the accommodating means 10 to restore the support part 50 and the striking part 70 to the original state, and the gas After replacing the filled gas cylinder (96) is assembled to the operating means 30 in the original state in the receiving means 10 is to be able to reuse the airbag system.

As described above, the present invention simplifies the receiving means incorporating the actuating means and the airbag into a single set, enables the reuse of the actuating means, and the physical inertia when a shock at a predetermined speed or more is applied to the front side of the vehicle while driving. By detecting and operating the airbag system without extra power, the released gas can be quickly supplied to the airbag, making it easy to install and reuse in any vehicle that does not have an airbag system at the time of manufacture. Economical effect can be obtained, and the injury prevention effect to the driver by the frontal collision of the vehicle will be maximized.

Claims (6)

In the airbag system with a built-in steering wheel, The lower case 13 coupled to the lower frame 12 in the center of the steering wheel 11 is configured, and the connecting boss 14 penetrated and fastened to the lower center of the frame 12 is configured, and the frame 12 is formed. A storage box 15 having a built-in operation means 30 is configured in the interior thereof, and an air bag case 16 configured to receive an air bag A connected to the operation means 30 and mount the upper portion of the storage box 15. A receiving means (10) comprising an upper cover (17) integrally fixing the outer portion of the airbag case (16) to the storage box (15); When a collision occurs in the front of the vehicle and a shock force is applied at a predetermined speed or more, a movable part 40 is formed in which the other free end rotates around the rotational fixed end on one side by collision inertia, and the free end of the movable part 40. The lower portion is configured to support the support unit 50 for releasing the hitting portion that is forcibly supported in conjunction with this, and when the support force is released by the support unit 50 is rotated elastically hitting the punching pins 81 (70) Is composed of, the operation means which is interlocked by the striking part 70 is composed of a discharge part 90 for discharging the gas ejected from the gas cylinder 96 to the air bag in a balanced manner ( Airbag system with built-in steering wheel, characterized in that consisting of 30). The receiving means 10 according to claim 1, The installation plate is bent to have a predetermined depth at a lower portion of the center of the steering wheel 11, and a fastening plate 121 is provided through the boss installation hole 122 in the center and through the plurality of physique holes 123 in the outside. Frame 12; A lower case 13 which wraps around the outer portion of the frame 12 and is opened upward so that the installation space is not exposed, and fastens each corner of four directions to four corners of the frame 12 with screws; Through the center of the lower case 13 is provided with a connector 141 which is in surface contact with the bottom surface of the fastening plate 121 in the center of the frame 12 and inserted into the boss installation hole 122 in the center and then fastened with screws. And a connecting boss 14 having a disk-shaped horn grounding member 142 and a turning direction indicating grounding member 143 integrally disposed at a lower portion spaced apart from the connector 141; The frame 12 is provided in a housing having a space having a depth and a width for accommodating the operation means 30 inside the frame 12, and a predetermined length is extended outward on both sides in the longitudinal direction to fasten holes 152 at each corner. Storage box 15 is provided with a fixing piece 151 through); A rectangular space opened upward is formed, a pair of through holes 161 are formed on the bottom surface, and an installation piece 162 extending outward is provided in the middle of both side walls, and the horn button 163 is provided at the rear end thereof. The airbag is mounted, the plurality of protrusions 164 on the rear of the plurality of protrusions spaced apart at regular intervals in the longitudinal direction, the opening and closing cover 165 is connected to the rear projections 164 fitted to open and close the opened upper surface With the case 16, The edge 171 is configured to be fastened in correspondence with the fixing piece 151 of the storage box 15 and the installation piece 162 of the airbag case 16, and to press the outside of the opening / closing cover 165, and the discharge pressure of the airbag. Steering wheel built-in airbag system, characterized in that consisting of an upper cover 17 formed with a rectangular opening and closing cover guide hole 172 on the inner side of the rim 171 to open the cover 165 pressed by the outside. The movable part 40 of the operating means 30 according to claim 1, On the outside of the support part 50, the movable lever 42, which is pivotally constructed by the hinge 41, extends a predetermined length to the other side, and has a locking hole 421 through the long hole at the center of one side, is constituted by the movable lever. A steering wheel built-in airbag system, characterized in that a movable weight 43 of a predetermined weight is formed on the other end bottom of the 42. The support part 50 of the operating means 30, The bearing base 511 which extends one side end of the movable lever 42 to the hinge 41 is protruded to the outside, and through the guide hole 512 in the center of one side of the upper portion, and the seating groove 513 on the other side thereof. And a bearing guide plate 514 having an inner surface perpendicular to the bottom portion of the bearing base 511, and includes a sub base 51 fastened to the main base 20 by screws and mounted thereon. Spring 521 is seated in the seating groove 513 of the), the guide pin 52 is passed through the engaging hole 421 of the movable lever 42 and inserted into the spring 521, the lower end of the sub-base ( And a pair of support bearings 531 fastened to the center of the seating groove 513 of the subbase 51 and rolling up and down in contact with the bearing guide plate 514 of the subbase 51 in a rolling manner. A locking bearing 532 is provided at the center of the other end, and the support bearing 531 and the locking bearing 532 have a rectangular fixed hole in the center. It is integrally formed by a fixed holder 53 divided into a pair so that the 533 is through, and the upper end of the rod is formed in a spherical shape so as to pass freely through the guide hole 512 of the sub-base 51 and A key piece 541 is formed on the outer periphery of the upper end and includes a locking piece 542 extending outwardly at a lower portion spaced from the key groove 541 by a predetermined distance, and a lower portion of the fixing holder 53 at the lower portion of the locking piece 542. Steering wheel built-in airbag system, characterized in that the lifting operation bar 54 is assembled with a rectangular fixing hole (533) formed in the center is possible to play in the front and rear, and has a locking jaw (543) to be caught without vertical play. The impact part 70 of the operating means 30, The shaft hole 741 of the striking member 74 is divided into up and down spaced apart by a predetermined interval so as to be located at the center, and separated into doubles inside and outside, and the upper locking protrusions 711, 721 and the lower locking protrusions (top and bottom). Each of the first and second springs 712 and 722 is vertically erected, and the first and second springs 71 and 723 are connected to each other in a vertical space and are extended in one horizontal direction. A boss 72 is formed, and the boss is formed in a plate shape to fix the central axis 73 on the upper portions of the first and second springs 71 and 72 so that the fixing hole 752 penetrates downward from the center of the bottom surface. A support cover 75 having a 751 is configured, and from the upper end to fix the striking member 74 connected to the center of the first, second and springs 71 and 72 to the main base 20. The shaft hole 741 of the striking member 74 in a position spaced apart by a predetermined interval has a diameter that is rotatably built up and the upper and lower ends Steering wheel airbag system built for the defined length, and the forming step. Consisting of a central axis (73) forming a fastening hole 731, 732 at the bottom at a predetermined depth, characterized. According to claim 1, wherein the discharge portion 90 of the operating means 30, The through-hole 921 is formed in the upper center to form a fastening member 92 for fastening by fastening with screws at the bottom of the four corners of the connection member 91, and the front and rear longitudinal directions of the rectangular plate body on the top of the fastening member 92. A gas diffusion case 93 having a pair of diffusion chambers 931 concave to the bottom and having an installation hole 932 on one side thereof is configured, and an installation hole 932 of the gas diffusion case 93. Through the through hole 921 of the fastening member 92 in sequence to form a injection hole (941) is inserted into the gas guide hole 913 of the connecting member 921 in the center and provided with a fastening piece 942 on the top The gas injection member 94 seated through the installation hole 932 of the gas diffusion case 93 is formed, and the diffusion chamber 931 is centered in front and rear of the same plate as the upper area of the gas diffusion case 93. And a gas discharge hole 951 through the long hole corresponding to the And an upper cover (95) formed with a guide plate (952) protruding obliquely in a different direction and forming an air bag attachment line (953) around the gas discharge hole (951).