KR20040032310A - Automobile head rest device for neck anti-injury - Google Patents

Abstract

PURPOSE: A headrest device for preventing injuries of a neck of a vehicle is provided to explode an inflator and move a piston downward by receiving a signal output from a collision sensor in a rear-end collision, to instantaneously rotate a rotary rod by the downward force of the piston, to instantaneously move a headrest frame forward together with a headrest from a seat back frame by the rotary power of the rotary rod, accordingly to minimize a gap between a passenger's head and a headrest supporting face, and to prevent neck injuries generated by suddenly pulling back the passenger's head. CONSTITUTION: An inflator(42) operated by receiving a signal of a collision sensor(30) sensing a rear-end collision and a piston(44) for moving downward by receiving the explosion gas pressure of the inflator are fixed and installed to a seat back frame(12). Third and fourth guide shafts(24a,24b) inserted and guided to upper and lower parallel slots(14a,14b) arranged to the seat back frame in the forward and backward direction of the vehicle body are installed to the upper and lower sides of the headrest frame vertically installed in a seat back(10) and attached with a headrest(20) at the upper end. A rotary rod(46) for receiving the downward force of the piston and rectilinearly moving the headrest frame forward is rotatively installed to the seat back frame between the front end of the piston and the lower end of the headrest frame.

Description

Auto head rest device for neck anti-injury

The present invention relates to a car head restraint device for preventing neck injuries. More specifically, the inflator is exploded and the piston descends at the same time by receiving the signal output from the collision detection sensor at the rear collision. As the 'a' shaped rotating rod rotates at the same time and the headrest frame is momentarily moved forward from the seatback frame with the headrest, the gap between the seat head and the headrest support surface can be minimized. The present invention relates to an automobile headrest device which can prevent a neck injury caused by the head of an occupant being sharply flipped backward.

In general, the seat back of the vehicle refers to the back of the seat parts, it is a part that usually provides a reaction force on the back and waist of the seated person to maintain the comfort of the seated person.

In addition, the seatback is assembled through a seat cushion and a recliner, and is generally composed of a seatback frame serving as a support, a foam for providing shock absorption and comfort, and a cover for maintaining aesthetics or shape.

In addition, a headrest is mounted on the top of the seatback, and the headrest serves to comfortably support the head of the seater while driving and protects the seater's head during a collision.

On the other hand, when a car stopped at an intersection or the like causes a speed change of 10 to 16 km and is crashed, it is very common to cause injury to the neck of a passenger, which is called a whiplash injury.

This whiplash injury, or neck injury, is known to be due to the difference in relative speed between the upper body and the head of the seat. The back of the seat causes the upper body of the seat to move forward due to the impact of the seatback, while the head remains in place. The shear force acts on the neck area, and this shear force causes a sudden impact on the joints and muscles of the neck as well as injury to the neck joints.

This will be described in more detail with reference to FIG. 4.

4 is a side view showing the state of the seat when the rear collision, the headrest 13 is mounted so as to support the seat of the seat on the upper end of the seat back (11).

First, since the seat itself is completely fixed on the body floor during rear collision, the vehicle body pushed forward and the seat completely fixed thereto move together to rapidly move the upper body of the seater forward.

At this time, the upper body of the seat is pushed forward by the seatback 13 momentarily, the head is in relative movement with the upper body by inertia, and the relative movement of the occupant's neck causes the considerable neck pressure. Will be added.

Eventually, while the upper body of the seater is pushed forward for a very short time, the head and neck lean back, pulling the seat and upper body of the seat in opposite directions. Severe deformation of the joints occurs.

On the other hand, as a way to prevent the neck injury of the seat occupant generated as described above, there has been known a neck injury prevention device of the head restraint for automobiles using a propulsion device [Korea Patent Publication No. 2002-0055700, 7 2002 March 10].

The neck injury prevention device includes a seatback frame and a headrest frame inherent in the seatback; Upper and lower slots respectively formed at upper and center portions of the seat back frame; A guide shaft which is fixed to the slot and slides; A propulsion device associated with the collision detection sensor and having a ignition portion ignited by the signal of the collision detection sensor to protrude the propelling member; It is configured to include a support installed on the lower end of the headrest frame while being impacted by the propulsion member, in this neck injury prevention device when the propulsion member of the propulsion device impacts the support during the rear collision accident, the headrest is the front side Minimize the gap between the seat head and headrest while moving upwards, thereby preventing the seat head from tipping back and preventing neck injuries.

However, the neck injury prevention device of the bar has a structure in which the headrest frame is moved forward while being supported by the upper and lower slots, but there is a problem that the headrest height is changed when the headrest frame is rotated.

That is, the phenomenon that the height of the headrest after the operation is increased compared to the initial height of the headrest that supported the seat head before operation, there is a disadvantage that the protection function of the headrest is reduced.

Therefore, the present invention was invented to solve the above problems, the inflator is exploded and the piston descends upon receiving the signal output from the collision detection sensor at the instantaneous collision, and the piston descends due to the lowering force of the piston. As the rotational rod of the shape of the child rotates at the same time and the headrest frame is moved forward in the seatback frame with the headrest, the gap between the seat of the seater and the headrest support surface can be minimized. It is an object of the present invention to provide an automobile headrest device for preventing a neck injury, which can be prevented from being sharply flipped back and forth.

At the same time, the present invention is to provide a vehicle headrest device that can minimize the height change of the headrest and the resulting degradation of the protective function by being configured to move the headrest frame and the headrest in a straight forward direction at the rear collision. have.

1 is a device configuration showing the configuration of a vehicle headrest device according to the present invention

Figure 2 is an operating state showing the operating state of the vehicle headrest device according to the invention

Figure 3 is a side view showing the state of the seat when the rear collision

<Explanation of symbols for the main parts of the drawings>

10: seat back 12: seat back frame

14a: upper slot 14b: lower slot

20: headrest 22: headrest frame

23: second guide shaft 24a: third guide shaft

24b: fourth guide shaft 30: collision detection sensor

42: inflator 44: piston

45: first guide shaft 46: rotation rod

48a: first slot 48b: second slot

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The head restraint device for preventing neck injury according to the present invention includes a seat back with a piston 44 which is operated by an inflator 42 which is operated by receiving a signal from a collision detection sensor 30 that detects a rear collision with the explosion gas pressure. The headrest frame 22 fixedly installed on the frame 12 and installed vertically in the seatback 10 and having the headrest 20 attached to the upper end thereof is formed in the seatback frame 12 in the front and rear direction of the vehicle body. Third and fourth guide shafts 24a and 24b, which are inserted and guided into upper and lower parallel slots 14a and 14b, respectively, are installed upward and downward, while the front end of the piston 44 and the headrest frame 22 are installed. Between the lower end portion is characterized in that the rotary rod 46 is rotatably installed in the seat back frame 12 to receive the lowering force of the piston 44 to move the headrest frame 22 in a straight forward direction.

In particular, the rotary rod 46 is provided in a '-' shape of the piston 44 by the first guide shaft 45 of the first slot 48a at one end and the front end of the piston 44 inserted therein. ) Is coupled to the headrest frame 22 by a second guide shaft 23 of the lower end of the headrest frame 22 inserted into and guided by the second slot 48b of the other end. do.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a vehicle headrest device according to the present invention, Figure 2 is an operational state diagram showing the operating state of the vehicle headrest device according to the present invention.

First, the inflator 42 is fixedly installed at a predetermined position of the seatback frame 12 in the seatback 10, and the inflator 42 is installed at the rear of the vehicle body to detect a rear collision. It is provided to receive and ignite, explode.

In addition, the inflator 42 has a piston 44 which is lowered by receiving gas pressure during explosion, and the first guide shaft 45 at the tip of the piston 44 is formed long at one end of the rotating rod 46 to be described later. The guide is inserted into the first slot 48a.

On the other hand, the seat back frame 12 inside the seat back 10 is provided with a rotatable rod 46 provided in a 'b' shape rotatably.

The first slot 48a is elongated in the longitudinal direction at one end of the rotary rod 46. As described above, the first guide shaft at the front end of the piston 44 is formed in the first slot 48a. 45 is inserted and guided.

That is, the piston 44 and the rotary rod 46 are coupled to each other by the first slot 48a and the first guide shaft 45 inserted and guided thereto, so that the rotary rod 46 is the inflator 42. When the piston (44) is lowered by the explosive force of the () is rotated about the central axis 47 in the seat back frame 12, wherein the first guide shaft 45 of the piston 44 of the rotary rod 46 Guided along the first slot 48a.

In addition, a second slot 48b is formed along the lengthwise direction of the rotary rod 46 at an end opposite to the end where the piston 44 is coupled, and the seat back 10 is formed in the second slot 48b. The second guide shaft 23 provided at the lower end of the headrest frame 22 installed vertically in the upper and lower sides is inserted and guided, so that the rotation rod 46 and the headrest frame 22 are second slots 48b. ) And the second guide shaft 23 inserted and guided thereto.

Meanwhile, the headrest frame 22 is provided with third and fourth guide shafts 24a and 24b disposed up and down, and the two guide shafts are formed on the seat back frame 12 in the front and rear directions of the vehicle body. And insertion guides into the lower parallel slots 14a and 14b.

That is, the third and fourth guide shafts 24a and 24b may be inserted and guided into corresponding slots 14a and 14b provided in parallel with each other at the upper and lower positions of the seat back frame 12. Accordingly, the headrest frame 22 is capable of being moved back and forth with the headrest 20 attached to the upper end. In particular, the headrest frame 22 is moved forward with the headrest 20. The distance between the seat head and the support surface of the headrest 20 is reduced.

Here, the force for moving the headrest frame 22 forward is the rotational force of the rotary rod 46, the rotational force of the rotary rod 46 is generated by the force that the piston 44 is to lower, such a piston The lowering force of 44 is due to the explosive force of the inflator 42.

Hereinafter, with reference to Figure 2 describes the operating state of the present invention.

First, when the rear collision of the vehicle occurs, the inflator 42 receives the signal output from the collision detection sensor 30 to explode.

When the inflator 42 explodes as described above, the piston 44 is lowered by the gas pressure, and the rotary rod 46 rotates in the counterclockwise direction of FIG. 2 about the central axis 47. One end of the rotary rod 46 connected to the piston 44 is moved downward relative to the pre-operation position, and at the same time, the other end of the rotary rod 46 connected to the headrest frame 22 is forward compared to the pre-operation position. Is moved to.

By the instantaneous rotational force of the rotary rod 46, the third and fourth guide shafts 24a and 24b of the headrest frame 22 are provided with the corresponding slots 14a and 14b above and below the seatback frame 12. Guided forward along the headrest frame 22 is momentarily forward with the headrest 20.

Here, the headrest frame 22 has the third and fourth guide shafts 24a and 24b simultaneously forward along the corresponding slots 14a and 14b of the seatback frame 12 by the rotational force of the rotation rod 46. Guided, the height change of the headrest 20 is minimized.

As a result, the momentary forward movement of the headrest 20 reduces the distance between the seat of the seat and the support surface of the headrest 20, thereby preventing the head of the seat from being sharply flipped back during a rear collision to prevent neck injury. It becomes possible.

As described above, according to the vehicle head restraint device for preventing neck injury according to the present invention, the inflator is exploded and the piston descends at the same time by receiving the signal output from the collision detection sensor at the rear collision instantaneously, the descending force of the piston By the 'a' shaped rotating rod is instantaneously rotated and at the same time the headrest frame is instantaneously moved in the seatback frame with the headrest, the distance between the seat head and the headrest support surface can be minimized. Therefore, there is an effect that can prevent the neck injury caused by the head of the seat is sharply flipped back.

In addition, in the vehicle headrest device according to the present invention, since the headrest frame and the headrest are linearly moved forward while the third and fourth guide shafts are simultaneously guided along the slots of the seatback frame, the height change of the headrest can be minimized. Therefore, there is an advantage in minimizing the degradation of the protection function of the headrest that has been a problem in the prior art.

Claims (2)

The inflator 42 which is operated by receiving the signal of the collision detection sensor 30 for detecting the rear collision is fixedly installed in the seat back frame 12 together with the piston 44 falling under the explosion gas pressure, and inside the seat back 10. In the headrest frame 22 is installed vertically long and the headrest 20 is attached to the upper end in the upper and lower parallel slots (14a, 14b) formed in the seat back frame 12 in the front-rear direction, respectively. The third and fourth guide shafts 24a and 24b to be inserted and guided are installed upward and downward, while the lowering force of the piston 44 is received between the front end of the piston 44 and the lower end of the headrest frame 22. Car headrest device for preventing neck injury, characterized in that the rotating rod 46 for moving the headrest frame 22 in a straight forward direction is installed rotatably in the seatback frame (12). According to claim 1, The rotary rod 46 is provided in the 'b' shape by the first guide shaft 45 of the tip of the first slot 48a and one end of the piston 44 is inserted into the first slot 48a Coupling with the headrest frame 22 by the second guide shaft 23 of the lower end of the headrest frame 22 and the second slot 48b of the other end and coupled to the piston 44 and inserted therein Vehicle head restraint device for preventing neck injury, characterized in that.