KR20070040600A - Active headrest - Google Patents

Abstract

The active headrest of the present invention includes a headrest portion including a carrier provided at an upper portion of the seat back and a front and rear movable body installed to be movable back and forth between the carrier and the link assembly provided at the lower portion of the seatback to receive a force by the torso of the occupant when the vehicle collides with the rear of the vehicle. And an operating part configured to connect the link assembly and the headrest part to move the front and rear moving bodies of the headrest part.

Car, active, headrest, cable, link

Description

Active Headrest

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the active headrest which concerns on the conventional invention, and the sheet | seat in which it was installed.

2 is a perspective view of the seat after the active headrest of FIG. 1 is actuated.

3 illustrates the operation of the active headrest of FIG.

4 is an exploded perspective view of an active headrest and a seat in which it is installed according to the present invention;

5 shows the actuator of the active headrest shown in FIG. 4;

6 is an exploded perspective view of the headrest portion of the active headrest shown in FIG. 4.

7 is a view showing before active headrest operation in accordance with the present invention;

8 shows after active headrest operation according to the invention.

<Brief description of symbols for the main parts of the drawings>

10: headrest portion 20: seat frame

30: connecting rod 31: guide hole

40: rotating shaft 50: shock plate

100: carrier 200: rotating body

300: front and rear moving body 400: spring

500: connection rod 700: cable jacket

800: moving plate 900: link

The present invention relates to a headrest mounted on a seat of a vehicle, and more particularly, to an active headrest that is operated automatically in the rear collision of the vehicle to reduce the neck injury of the occupant.

As shown in Figures 1 to 3, the conventional active headrest is connected to the seat frame 20, the rotating shaft 40 rotatably installed inside the seat frame 20, and the rotating shaft 40 An impact plate 50 rotatably installed around the rotation shaft 40 inside the seat frame 20, a headrest part 10 positioned above the seat frame 20, and the seat frame ( The connecting rod 30 penetrates the guide hole 31 formed at the upper end of the 20 to connect the impact plate 50 and the headrest part 10. In the conventional active headrest configured as described above, when the occupant's torso pushes the impact plate 50 in the state shown by the solid line of FIG. 3, the impact plate 50 of the seat frame It rotates counterclockwise about the rotating shaft 40. Then, the connecting rod 30 connected to the impact plate 50 rises along the guide hole 31. Therefore, the headrest portion 10 coupled with the connecting rod 30 moves upward and forward to support the occupant's head.

However, such a conventional headrest implements forward movement of the headrest part by the link structure, so that a large link structure is installed, which is expensive, occupies a lot of space, and increases the weight of the seat.

In addition, the active headrest by the link has a limitation in protecting the neck by accurately supporting the neck as compared with only moving forward because the headrest part does not move forward only, but moves upward together during operation. Moreover, the impact plate 50, which the passenger's torso touches, is positioned in the middle of the seat frame, and the shock plate rotates in the seat frame, thereby changing its position, so that a conventional active headrest requires a large space. Therefore, when the conventional active headrest is applied to the seat, it is difficult to apply other functions of the seat (for example, lumber support, ventilation, massage, etc.) together.

Thus, there is a need for active headrests that are cheaper, take up less space, perform better, and can be used with other functions.

Accordingly, the present invention has been made to solve the above problems of the prior art, to accurately support his head to protect the neck of the occupant during the rear collision of the vehicle, to reduce the weight by avoiding the heavy link structure, simple and The purpose is to provide an active headrest that can be reduced in cost by having a light structure.

Hereinafter, the features of the present invention for achieving the above object are as follows.

The active headrest of the present invention includes a headrest portion including a carrier provided at an upper portion of the seat back and a front and rear movable body installed to be movable back and forth between the carrier and the link assembly provided at the lower portion of the seatback to receive a force by the torso of the occupant when the vehicle collides with the rear of the vehicle. And an operating part configured to connect the link assembly and the headrest part to move the front and rear moving bodies of the headrest part.

 The headrest part may include a rotating body rotatably installed on the carrier, and the front and rear moving body may be helically coupled to the rotating body so that the front and rear moving body moves forward by the rotation of the rotating body.

In addition, a spring is connected between the carrier and the rotating body may be configured to restore the rotation of the rotating body. The connecting member of the operating part may be configured as a cable connected to one end of the link assembly and the other end to the rotating body. The link assembly may include a moving plate and a link, and the link may be configured to be connected between the moving plate and the seatback frame so that the left and right ends thereof move away from or close to each other. The cable includes a cable wire and a cable sheath surrounding an intermediate region excluding both ends of the cable wire, both ends of the cable wire being coupled to one end of the rotor and the link, and both ends of the cable sheath being connected to the carrier. It may be coupled to the other end of the link.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is an exploded perspective view of the active headrest and seats installed therein according to the present invention, Figure 5 is a view showing a link assembly of the active headrest shown in Figure 4, Figure 6 is an active head shown in Figure 4 The exploded perspective view of the headrest part of a rest is shown.

The active headrest according to the present invention is provided at the top of the seatback to support the head of the occupant, and is provided at the bottom of the seatback to operate the headrest by receiving the force by the torso of the occupant in the rear collision of the vehicle It consists of wealth.

The headrest part is located in front of the carrier body 100 is fixed to the upper portion of the seat back, an air cylindrical rotor 200 is rotatably installed on the carrier 100, the front of the rotor 200 It includes a front and rear moving body 300 installed in the carrier 100 so as to be movable back and forth, and a coil spring 400.

A spiral groove 210 is formed on an outer wall of the rotating body 200 having a hollow cylindrical shape.

The front and rear movable body 300 is a cylindrical rotating body coupling portion having a protrusion 340 moving along the spiral groove 210 on the inner side wall so that the spiral movement is coupled to the outer side of the rotating body 200 ( 320 and a cushion support part 330 having a shape corresponding to the front surface of the carrier 100 in front of the rotating body coupling part 320. On the rear surface of the cushion support 330 a plurality of carrier coupling portion 310 is formed to extend rearward. In the illustrated embodiment, the carrier coupling part 310 is formed at each corner corner and center of the cushion support part 330. At this time, the carrier coupling part 310 formed in the center is formed in the rotor coupling part 320. The carrier coupling part 310 is coupled to the front and rear moving body guide parts 110 and 120 formed on the carrier 100 so as to be movable back and forth.

Both ends of the spring 400 are coupled to one side of the carrier 100 and one side of the rotor 200. In the illustrated embodiment, the spring hook portion formed on the outside of the front and rear movable body guide portion 120 formed at the center of the carrier 100 and the spring hook portion formed on the inner side of the rotating body 200 (not shown). Both ends of 400 are connected. By such a configuration, the rotor 200 receives an elastic force to return to the initial direction after the rotation.

The actuating part is composed of a link assembly located under the seat back, and a cable connected at one end to the link assembly and at the other end to the headrest part.

The link assembly includes a moving plate 800 installed in the seat back lower frame so as to be movable back and forth, and a link 900 connected to a rear portion of the moving plate 800.

The moving plate 800 has a rectangular shape and hinge shafts 830 are installed at left and right ends thereof, and has first and second coupling parts 810 and 820 spaced apart from each other by a predetermined distance from the center. The hinge shaft 830 is movable in the coupling portion 21 of the rectangular groove shape of the seat frame. A spring 23 is installed inside the coupling portion 21, and the spring 23 is located at the rear of the hinge shaft 830 to operate. Among the coupling parts 810 and 820, the first coupling part 810 is formed as a circular groove, and the second coupling part 820 is formed as a rectangular groove.

The link 900 has four link plates 960, three hinge shafts 910, 920, and 930 located at the connection portion between the link plates 960, and the left and right ends of the link 900. Fork-shaped cable couplings 940 and 950 are disposed at both ends of the outer link plate 960, and seat couplings 970 are disposed at upper and lower portions of the rear ends of the outer link plates 960.

The link plate 960 has a quadrangular shape, and adjacent link plates are coupled to each other by the hinge shafts 910, 920, and 930 to be rotatable. Of the three hinge shafts 910, 920, 930, the hinge shafts 910, 930 on both the left and right sides thereof are coupled to the coupling portions 810, 820 of the moving plate 800, respectively. That is, one hinge shaft 910 of the hinge shafts 910 and 930 to be coupled is fixedly coupled to the first coupling portion 810 having a circular hole shape, and the other hinge shaft 930 is a second coupling portion having a rectangular hole shape. 820 is movably coupled within. In addition, the seat coupling portion 970 is slidably coupled to the link guide 22 formed in the seat frame. In this case, the link 900 coupled to the moving plate 800 may be corrugated, for example, formed in a W shape, and the link shaft may be moved as the hinge shaft 930 moves in the second coupling part 820. The left and right ends of the 900) become farther or closer to each other. In this case, the link 900 may be coupled to the two link plate 960 in a V shape.

The cable includes a cable wire 740 and a cable sheath 700 surrounding an intermediate region excluding both ends of the cable wire 740. Cable wire fixing parts 720 are formed at both ends of the cable wire 740, and cable outer fixing parts 710 are formed at both ends of the cable sheath 700.

The cable sheath fixing part 710 is fixedly coupled to the carrier 100 and the cable coupling part 940, and the cable wire fixing part 720 is connected to the rotating body 200 and the cable coupling part 950. Fixedly coupled.

Hereinafter, the operation of the cable type active headrest according to the present invention made according to the above-described configuration will be described.

In a rearward collision while driving a vehicle, the occupant is momentarily pushed back and the torso (eg waist and / or back) hits the seat. At this time, the body pushes the moving plate 800 of the linkage assembly. When the movable plate 800 pushes the link 900, both ends of the link 900 move away from each other. Accordingly, the length between the cable coupling portions 940 and 950 formed at both ends of the link 900 also increases, so that the length between the cable sheath fixing portion 710 and the cable wire fixing portion 720 on the link assembly side. As the length of the cable wire 740 is pulled toward the link assembly side.

As the cable wire 740 is pulled, the cable wire fixing part 720 positioned on the headrest side pulls and rotates the rotating body 200 connected thereto.

As the rotor 200 rotates, the protrusion 340 of the front and rear movable body 300 which rotates and is engaged with the spiral groove 210 moves forward. That is, the front and rear moving body 300 moves forward in a state in which the carrier coupling part 310 is inserted into the guide parts 110 and 120 of the carrier 100.

As the front and rear movable body 300 moves forward, the cushion 1000 provided in the cushion support part 330 of the front and rear movable body 300 moves forward to quickly support the occupant's head.

Such a state before and after the operation of the active headrest is shown in FIGS. 7 and 8. That is, Figure 7 is a view showing the active headrest before the operation according to the present invention shows a state in which the front and rear moving body 300 is attached to the carrier 100, Figure 8 shows after the active headrest operation according to the present invention. FIG. 1 illustrates a state in which the front and rear moving body 300 moves forward by the rotation of the rotating body 200 and moves forward of the carrier 100.

One end of the spring 400 is fixed to the carrier 100 and the other end of the spring 400 is fixed to the rotating body 200. When the rotating body 200 is rotated by the cable wire fixing part 720, the spring 400 is elongated to generate elasticity so that the rotating body 200 receives an elastic force to return to its original position.

Therefore, when the rear collision, the link assembly composed of the moving plate 800 and the link 900 pulls the cable wire 740 and the headrest part is moved forward by the cable wire 740 so that The head is protected, and when the force applied to the movable plate 800 is removed, the movable plate 800 is moved forward by the springs 400 and 22 and both ends of the link 900 are brought closer to each other. The cable wire 740 that has been pulled is restored to its original state and the headrest portion is returned to its original state.

       As described above, according to the present invention, in order to protect the neck of the occupant during the rear collision of the vehicle, the head is accurately supported, and the heavy link structure is prevented from entering, thereby reducing the weight and having a simple and light structure, thereby reducing the cost. It is effective to make.

Claims (6)

A headrest portion including a carrier provided at an upper portion of the seat back and a front and rear movable body installed to be movable back and forth between the carrier and the link assembly provided at a lower portion of the seat back and being forced by a torso of a passenger when the vehicle collides with the rear of the vehicle; An active headrest comprising an operation part configured to connect the headrest part to move the front and rear moving body of the headrest part. The method of claim 1, wherein the headrest portion includes a rotating body rotatably installed on the carrier, the front and rear moving body is helically coupled to the rotating body, the front and rear moving body is advanced by the rotation of the rotating body. Active head restraint. The active headrest of claim 2, wherein a spring is connected between the carrier and the rotating body to restore rotation of the rotating body. The active headrest according to any one of claims 1 to 3, wherein the connection member of the operating unit is a cable connected at one end to the link assembly and at the other end to the rotating body. 5. The active headrest of claim 4, wherein the link assembly comprises a movable plate and a link, wherein the link is corrugated to be connected between the movable plate and the seatback flame so that the left and right ends thereof move away from or close to each other. 6. The cable of claim 5, wherein the cable comprises a cable wire and a cable sheath surrounding an intermediate region excluding both ends of the cable wire, both ends of the cable wire being coupled to one end of the rotor and the link, Both ends are coupled to the other end of the carrier and the link active headrest.

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