JPH0257451A - Steering device - Google Patents

Abstract

PURPOSE:To enhance reliability in air back actuation by providing a pad section with a mechanical sensor which will actuate a gas generator at the time of starting a specified speed reduction rate in the boss section of a steering wheel main body provided with the pad section containing an air bag device. CONSTITUTION:In a steering device, a steering wheel main body 1 is fastened to the upper end section of a steering shaft 10 so as to be fixed at its boss section 9 wherein a pad section 12 is mounted onto the upper section of the boss section 9 via an irrotational mechanism 13. In addition, a pad 33 made of soft synthetic resin is installed onto the upper section of a supporting frame 31 fixed onto the upper cylindrical member 14 of the irrotational mechanism 13 via an installation frame 32, and an air bag 35 which will be expanded by the actuation of a gas generator 36, is installed on to the upper face of the installation frame 32 in a folded condition. In this case, a mechanical sensor 39 is provided for the pad section 12 while being oriented toward the specified direction against the vehicle running direction wherein the sensor will actuate the gas generator 36 at the time of starting a speed reduction rate equal to or more than a specified one upon sensing the rate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a steering device used in a vehicle such as an automobile.

(Conventional technology) Conventionally, as a steering device that controls the air pack,
As shown in Japanese Unexamined Patent Publication No. 52-116537, an air pack and a gas generator are provided inside the pad of the steering wheel body, and the air pack and gas generator are used in the event of a vehicle collision.
The system detects the presence of air and activates the gas generator to supply gas into the air pack, inflating the air pack and protecting the driver from secondary collisions with the steering wheel, instrument panel, etc. I have to.

Furthermore, as shown in Japanese Utility Model Application No. 62-127840, the steering wheel body is provided with a pad portion that resists the rotation of the steering wheel body and remains stationary at all times, and an airbag C and a It has been proposed to install a gas generator.

(Problem to be Solved by the Invention) In the above-mentioned steering device, a mechanical [operator] is used to operate the gas generator, which detects deceleration exceeding a predetermined value using lfl force. →
) is used. .

In this case, attach this sensor to the steering wheel body.
Q When the steering wheel body is rotated, the steering wheel body is tilted, so the direction of the inertial force acting on the sensor differs depending on the angle of rotation of the steering wheel body, and the inertia force is reduced in each case. The problem of different speed sensing states is 11-.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a steering device that reliably protects driving efficiency by means of an airbag, without being affected by the rotation angle of the steering wheel body. .

(Structure of the Invention) (One Step to Solve the Problem) The present invention provides a steering wheel body 1 having a rim portion 4, spoke portions 7, and iF spoke portions 9, and a boss portion 9 indicated by -V. Elegantly installed Sue 77 ring wheel body 10
Pad 8IS12 that resists rotation and always remains 115 stationary
In a steering device that includes a 1J17 bag 35 housed inside the pad section 12 and a gas generator 36 that supplies gas to and inflates the air bag 3! A mechanical hinge 39 is installed in a predetermined direction with respect to the traveling direction of the vehicle and senses the occurrence of deceleration exceeding a predetermined speed and operates the gas generator 36. .

(Function) According to the present invention, when a vehicle decelerates beyond a certain level during a south collision, etc., the sensor 39 is activated due to the inertia of the vehicle. A large amount of gas is generated from the gas generator 3G to inflate the airbag 3) and protect the operation.

At this time, by setting the sen 1 no. 39 in the pad part 12 that maintains the stationary state, the sen 1 no. 3 is always in the same direction with respect to the traveling direction of the JF7 vehicle, so the sen+j39 The lfl fl force applied to the steering wheel I is not influenced by the operational rotation angle of the steering wheel I, and the deceleration relative to the direction of travel of the vehicle can be sensed with low accuracy. Since the steering wheel body 1 is always in a static state even when the steering wheel body 1 is rotated 44, the airbag 3 is in a constant state! ) can be made fl-initial.

(Example) Hereinafter, implementation (A) of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a "steering wheel body", and the steering wheel body 1 includes an annular rim part 4 in which the outside of a rim core metal 2 is covered with a covering material 3, and a spoke core metal 5 connected to the rim core metal 2 by melt WL. It consists of a temporary spoke part 7 whose outside is covered with a covering material 6, and a boss part 9 which has a boss 8 welded to the center part of the spoke core metal 5. is fitted to the upper end of the steering shaft 10 and fastened and fixed with a nut 11.A pad portion 12 is also provided on the upper portion of the boss portion 9 via a rotation mechanism 13. .

This) 11 rotations B! The structure 13 has a cylindrical upper cylindrical member 14 integrally formed of synthetic resin. 16, and an internal tooth 17 is formed on the inner peripheral surface of this circular 11-shaped portion 16.
The mating cylinder part 15 is fitted into the rotation eye (1) via a bearing 18 for external use.

This upper cylindrical member 19 is formed integrally with a 19μ synthetic resin r, and has a two-circle-shaped -IJ side cylindrical part C1. 1, an inner tooth 22 is formed on the inner circumferential surface of this annular portion 21, and
A plurality of locking claws 23 are provided protruding from the lower surface. , then,
The inner one-piece joint cylinder part 20 is fitted to the outer periphery of the lower part of the boss 8 shown in FIG.
It is engaged with the combination switch case 2G, which is attached to the steering link 9m 25 on the outer periphery of 10.
C color.

The support frame 2 on the upper side is placed near the center of the spoke core t5.
7 is fixed to this support frame 21, and an internal gear 17.2 is fixed thereto.
A planetary gear 28 meshed with the rotation n6 is supported by a support shaft 29 at the rotation n6.

The above-mentioned butt part 12 has a supporting frame 31 fixed to the upper part of the above-mentioned upper III cylindrical member 14, and a yh-shaped frame formed of soft synthetic resin and opening on the lower surface, which is attached to the upper part of this supporting frame 31 via a mounting frame 32. A shaped pad 33 is attached to the side wall thereof,
This pad 33 has a slit-shaped part on a part of the flat surface.
4 is formed.

The opening edge of an airbag 35 is airtightly fixed to the upper surface of the A-1 frame 32, and the airbag 35 is stored inside the pad 33 in a folded state.

The airbag 3 is attached to the mounting frame 32 inside the pad 33.
A gas generator 36 is installed so as to face the frontage of 5. This gas generator 36 has a frame 37 filled with a gas generating agent 38 .

The above gas generation'! When a deceleration exceeding a predetermined value occurs for the A36, this is detected and gas is generated'! A mechanical sensor 39 is provided which activates S36.

This sensor 39 is connected to a cylinder 40 provided in the frame 37.
A ball-shaped weight 41 for VjJ impact sensing is movably provided inside. Further, a guide frame 42 is provided adjacent to the J-marked cylinder 40, and within this guide frame 42, one selection of a dot large dot g143 is included which can be freely advanced or retracted.
3 is a spring 44 that is always mounted on the tip side (J9A), and a detonator 45 is provided at the tip of the guide frame 42.Furthermore, on one side of the guide frame 42, a detonator 45 is provided.
A letter-shaped rotation shaft 46 is rotatably provided, and this rotation 14
A lever 47 is removed from the lever 46, and one end of the lever 47 faces the weight 41, and the lever 47
The other end of I is engaged with a spring 48 and is constantly biased counterclockwise in the figure, and the ignition needle 43 is connected to the rotating shaft 4.
6 is engaged. In this way, the sensor 39 is provided within the pad portion 12 in a predetermined direction with respect to the traveling direction of the vehicle.

Then, when the steering wheel body 1 is rotated, the planetary gear 28 is rotated along with the support frame 27 to the lower cylindrical member 19.
The upper cylindrical member 14 rotates and revolves around its axis through engagement with the inner gear 17 of the upper cylindrical member 14, and rotates the upper cylindrical part 114 in a relatively opposite direction through engagement with the internal gear 17 of the upper cylindrical member 14, As a result, the upper side member 14 and the pad portion 12 are kept 15 in a non-rotating state.

Further, under normal operating conditions, even if the weight 41 of the sensor 39 rolls, the lever 41 does not rotate due to the spring 48. On the other hand, when deceleration exceeding a certain level occurs due to a vehicle collision, etc., the inertia causes the vehicle to decelerate by just 4
1 moves in the direction of travel of the vehicle, rotates the rotating shaft 46 together with the lever 41 against the force of the spring 48, whereby the ignition needle 43 is unlocked and fired by the spring 44. The ignition pin 43 hits the detonator 45 and emits m, igniting the ignited mulberry, and at the same time, avoids burning the base generator 38 of the gas generator 3G to generate gas, and air is discharged from the gas generator 3G. Gas is rapidly blown out inside the bag 35, and the air bag 35 is suffocated by the internal pressure.

*+i of this airbag 35 presses the pad 33 from the inside and breaks through the pad 33 along the line 34, and the airbag 35 expands to 111% on the outside of the pad 33 to protect the driver. .

At this time, a sensor 3 is installed inside the pad section 12 that maintains a stationary state.
9, the sensor 39 is always in the same direction with respect to the direction of travel of the vehicle, so the inertial force exerted on the weight 41 of the sensor 39 is applied to the steering wheel body 1. The pad part 12 is always in the static 1F state even when the steering wheel main body 1 is rotated. Therefore, the airbag 35 can be caused to move f1ω'' in a constant state.

〔Effect of the invention〕

According to the present invention, an airbag, a gas generator, and a sensor are housed inside the pad section which is kept in a non-rotating state, and the sensor is always moved f1 in a constant state. ,
It is possible to reliably protect the driver and ensure the safety of the driver in the event of a collision.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the steering device of the present invention. J
A vertical cross-sectional view, and FIG. 2 is a plan view thereof. 1. Steering wheel body, 4. Rim part, 7.
・Spoke part, 9・Boss part, 12・Pad part, 35・
・Airbag, 36.・Gas generator, 39.・Sensor. 1986 8112211 Invention fee Kazuhiro Kaneko, Kazuyama Nishijima; IT: l'+ Kfl person [T1hon Plast Co., Ltd.

Claims (1)

[Claims] (1) A steering wheel body having a rim part, a spoke part, and a boss part, a pad part provided on the upper part of the boss part to maintain a stationary state at all times against the rotation of the steering wheel body, and an inside of this pad part. In a steering device equipped with a stored airbag and a gas generator that supplies gas to the airbag and inflates it, the steering device is provided within the pad portion in a predetermined direction with respect to the traveling direction of the vehicle and has a predetermined size. 1. A steering device comprising: a mechanical sensor that senses when deceleration exceeding 100% occurs and operates the gas generator.