KR20100006194A

KR20100006194A - Active headrest

Info

Publication number: KR20100006194A
Application number: KR1020080066320A
Authority: KR
Inventors: 김도형
Original assignee: 다이모스(주)
Priority date: 2008-07-09
Filing date: 2008-07-09
Publication date: 2010-01-19

Abstract

PURPOSE: An active headrest is provided to prevent the neck damage of a passenger due to shock by supporting a head of a passenger with a support plate in a collision of a vehicle. CONSTITUTION: An active headrest is composed of a main bracket(10), a rear link board(20), a front link board(30), a support plate(50), and an operation spring(60). The main bracket is installed onto a seat back. The rear link board is connected to the main bracket with a hinge pin(41). The front link board is connected to the rear link board with a hinge pin(42). The support plate is connected to the front link board with a hinge pin(43). The operation spring pushes the rear link board toward the direction spread from the main bracket.

Description

Active headrest

The present invention relates to an active headrest of a car seat that supports the head of the occupant in the event of a collision and prevents injury due to a sharp neck break.

At the top of the seat back of the car seat, a headrest supporting the head of the occupant is provided so that the occupant can rest comfortably with the head rested on the headrest.

By the way, while driving, especially in the case of a driver, the back is leaned on the seatback but does not take the posture leaning to the headrest to the head.

Therefore, when a collision accident occurs while driving, the neck of the occupant is suddenly flipped back due to the inertia of the vehicle and the head of the occupant, causing serious injuries. The conventional fixed headrest supports the occupant's head that is tilted backward. The lack of knowledge did not help prevent neck injuries from collisions.

Accordingly, various types of active headrests have been developed in which a headrest moves forward and upward to support a passenger's head when a collision occurs.

However, the conventional active headrest is provided with a pressure plate that is pushed backward by the occupant or the like in most cases of the interior of the seat back frame, the rod connected to the pressure plate is installed so as to rotate around the top of the seat back frame, The headreststay is fixed to the rod, and the headrest is moved forward by the rearward movement of the pressure plate. The active headrest device is installed in the seatback as well as the headrest. The seat had the disadvantage of not adding the active headrest function.

In addition, there are many active headrest devices installed limited to the inside of the headrest, but in such a case, there are problems in that most of the configurations are very complicated and thus the assembly is not easy and the durability is also poor.

Accordingly, the present invention is conceived in view of the above, the device configuration is made only in the interior of the headrest can be applied to existing mass-produced models, and the configuration is simple to provide an active headrest with improved assembly and durability The purpose is.

The present invention for achieving the above object,

A main bracket fixed to the headrest stay and installed at the top of the seat back;

A rear link plate connected to the main bracket by a hinge pin;

A front link plate connected to the rear link plate by a hinge pin;

A support plate connected to the front link plate by a hinge pin;

An actuating spring installed on the main bracket side hinge pin to push the rear link plate toward the main bracket;

It is configured to include.

The actuating spring includes a coil part provided at the main bracket side hinge pin and a support part extending from both sides of the coil part to support the main bracket and the rear link plate.

In addition, a striker is installed on the rear surface of the support plate, and a latch assembly for restraining the striker is installed on the front surface of the main bracket.

The latch assembly is a mounting bracket mounted to the main bracket, a latch is rotatably fixed to the mounting bracket with a hinge pin and a groove into which a striker is inserted, and the latch bracket is rotatably fixed to the mounting bracket with a hinge pin. A catching jaw is formed to be caught on the catching jaw and includes a pawl with a pressing plate protruding from the front end;

Under the latch assembly, a mounting box mounted on the lower flange of the main bracket, a solenoid body installed in the mounting box, and a solenoid body protruding from the solenoid body and penetrates the upper surface of the mounting box and is lower than the pressure plate. Consists of a core rod located in the release device for pushing the pressure plate upward;

On the other hand, teeth are formed on the contact surfaces of the connecting ends of the rear link plate and the front link plate, respectively, and are coupled to each other.

In addition, the connecting end of the rear link plate and the front link plate is formed with a length that the margin portion is present in the hinge pin for connecting it, the spring is provided with contacting the connection end portion.

According to the present invention as described above, the support plate protrudes forward to support the head of the occupant at the same time as the collision accident occurs, thereby preventing a sharp necking of the occupant's neck to prevent serious neck injury.

On the other hand, the present invention can be easily applied to the existing mass-produced seats because all components for functioning as active headrests are installed inside the headrests.

In addition, the assembly of the device is made of a simple mechanism structure, excellent assembly and durability.

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

1 is a perspective view of the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is a sectional view of a central portion, in which an active headrest is operated.

The present invention is the main bracket 10, the support plate 50, the rear link plate 20 and the front link plate 30 and the rear link plate 20 for connecting the main bracket 10 and the support plate 50. It includes an operating spring (60) for touching.

The main bracket 10 is welded to the headrest stay and can be installed on the top of the seat back frame.

The main bracket 10 is a substantially T-shaped plate, the upper flange 11 is formed on the upper end, the intermediate flange (on the same position as the end of both sides of the upper flange 11) on both sides of the horizontal portion of the body ( 12) is formed, the lower flange 13 is formed at the bottom of the vertical portion of the body.

The rear link plate 20 is rotatably connected to the upper flange 11 and the intermediate flange 12 via a hinge pin 41.

In addition, one end of the front link plate 30 is connected to the other end of the rear link plate 20 by a hinge pin 42, and the support plate 50 is connected to the other end (front end) of the front link plate 30. do. These are all rotatable relative to the hinge pins 41, 42, 43.

The support plate 50 is a rectangular plate having the same width and height as the horizontal portion of the main bracket 10, and serves to support the occipital head of the occupant, the upper flange 51 and the lower flange at the upper and lower ends thereof. 52 is formed to provide a hinge pin 43 installation surface for connection with the front link plate (30).

End portions of the rear link plate 20 and the front link plate 30 connected to the intermediate hinge pin 42 are formed to have a shorter length than the opposite ends (ends connected to the main bracket and the support plate side) so that the upper and lower ends are in contact with each other. It is penetrated by the hinge pin 42.

One side of the short end of the rear link plate 20 and the front link plate 30 is connected to one side of the long end by a gentle inclined surface.

An operating spring 60 is installed on the hinge pin 41 for mounting the rear link plate 20 to the main bracket 10.

The actuating spring 60 includes a coil part 61, a support part extending from both sides of the coil part 61, that is, a rear link plate side support part 62 and a main bracket side support part 63.

The actuating spring 60 may be configured to have two coil parts 61 as shown, in which case the rear link plate side support parts 62 are connected as one (dimple-shaped part) and the rear link plate 62 is more stable. ) Can be applied to the operating force.

On the other hand, the hinge pin 42 connecting the two link plates 20 and 30 has an extra length in addition to the portion occupied by the connection ends of the link plates 20 and 30, and a spring 70 is installed in the margin part. .

The spring 70 always exerts a force in the direction in which the ends of the two link plates 20, 30 are in close contact. However, due to the presence of the clearance portion and the spring 70 may be artificially spaced apart from the contact surface of the rear link plate 20 and the front link plate 30.

By using this, teeth (21, 31) can be rotated in one direction only between the contact surfaces of the rear link plate (20) and the front link plate (30), so that only the operation in the direction in which the two link plates are unfolded and not artificially manipulated. It is possible to configure it so that it cannot be folded back unless otherwise.

To this end, as shown in FIGS. 3 and 4, the connecting end contact surfaces of the rear link plate 20 and the front link plate 30 are in contact with each other when the two link plates 20 are rotated (opened) in the unfolding direction. It is formed of the inclined surfaces (21a, 31a) and the vertical surfaces (21b, 31b) which are formed in succession to the inclined surfaces (21a, 31a) and contact each other when the two link plates (20, 30) are rotated (retracted) in the folding direction. Teeth 21 and 31 are formed.

Meanwhile, a striker 53 is provided at the center of the rear surface of the support plate 50, and a latch assembly 80 for restraining the striker 53 is installed at the front center of the main bracket 10.

The latch assembly 80 includes a mounting bracket 81 mounted at the front center of the main bracket 10, a latch 82 provided to be rotatably mounted to the mounting bracket 81, and a rotation state of the latch 82. It consists of a pole 83 to restrain. Of course, the latch 82 and the pole 83 are rotatably installed on the mounting bracket 81 via the respective pivot pins.

The latches 82 and the poles 83 have the strikers 53 accommodated in the grooves 82a of the latches 82, and the locking jaws 82b and 83a are in contact with each other when the latches 82 are rotated. ) Is formed.

In addition, a pressure plate 83b protruding obliquely downward is formed at the front end of the pawl 83.

On the other hand, the release device 90 thereof is installed below the latch assembly 80.

The release device (90) is a solenoid type of linear actuator that includes a solenoid body (91) and a core rod (92) protruding therefrom, and the solenoid body (91) is a lower flange (13) of the main bracket (10). It is installed in the mounting box 93 to be mounted on.

The mounting box 93 is a hexahedral box shape having both sides opened and welded to the lower flange 13, and the core rod 92 protrudes upward through an upper wall, and the pole 83 is located at the position. It becomes the lower part of the pressure plate 83b of the.

The release device 90 is operated by an electronic control unit that receives an accident occurrence signal from a collision detection sensor that detects a collision accident.

The operation of the present invention will be described below.

4, 5, 6, and 7 are diagrams corresponding to FIGS. 1,2,3, and 4 of the present invention, and show a state diagram before operation of the present invention.

That is, the rear link plate 20 and the front link plate 30 on both sides of the main bracket 10 are folded, so that the support plate 50 is located close to the main bracket 10.

At this time, since the angle between the rear link plate 20 and the main bracket 10 is reduced, the two springs 62 and 63 of the actuating spring 60 are retracted so that the restoring force acts, so that the actuating spring 60 is operated. Is being forced in the direction of unfolding again.

However, the striker 53 fixed to the support plate 50 is inserted into the groove 82a of the latch 82, and the latch 82 is caught by the locking action of the locking jaws 82b and 83a. The support plate 50 maintains a position close to the main bracket 10 despite the restoring force of the operation spring 60 because it is bound to (83).

If a collision accident occurs in the above state and the accident occurrence signal is transmitted from the collision detection sensor to the electronic control unit, the electronic control unit operates the solenoid body 91 of the release device 90 to protrude the core rod 92. .

When the core rod 92 protrudes upward, the pressure plate 83b is pushed upward, and the pole 83 is rotated clockwise. Accordingly, the latching state of the latching jaws 82b and 83a is released. The constraint state of is released.

Therefore, the rear link plate 20 and the front link plate 30 are unfolded by the restoring force of the operation spring 60 which is still in operation. At this time, since the latch 82 no longer restrains the striker 53, By unfolding the support plate 50 is moved away from the main bracket 10 to the front.

Since the operation is performed at the same time as the collision accident occurs, the support plate 50 moved forward in the event of a collision accident supports the occipital head of the occupant to prevent the neck of the occupant is sharply bent backwards. This can prevent serious injuries from sudden necking.

On the other hand, the support plate 50 that is deployed forward can support it without being pushed back to the rear by the load of the occupant's head at the contact portion of the connecting end of the rear link plate 20 and the front link plate 30 By the teeth 21 and 31 formed.

As described above, the teeth 21 and 31 are composed of inclined surfaces 21a and 31a and vertical surfaces 21b and 31b, and when the two link plates are unfolded, both inclined surfaces are in contact with each other and both link plates are retracted. The vertical surfaces of the are formed to contact each other.

Therefore, when the latch assembly 80 is released by the release device 90 and the support plate 50 moves forward, the inclined surfaces 21a and 31a may come into contact with each other to slide while the rotation may continue. When the load by the occupant's head is transmitted, the rear link plate 20 and the front link plate 30 are no longer folded because the vertical surfaces 21b and 31b are in contact with each other and no further rotation is possible. The position of 50) can be fixed.

However, after the task of supporting the occupant's head in the event of a collision is completed, the support plate 50 needs to be returned to its original position, which is a marginal portion of the intermediate hinge pin 42 except for the connecting end of the two link plates. This is possible by being present.

The spring portion 70 is provided in the clearance portion to keep the connecting end of the rear link plate 20 and the front link plate 30 in contact with each other, thereby restraining the return by the interaction of the teeth 21 and 31 (head passenger's head support). Operation is performed as intended in the design.

On the other hand, when the support plate 50 is arbitrarily returned after the above operation, the front link plate 30 is lifted with respect to the rear link plate 20 to separate the engaged state of the two.

At this time, the spring 70 is compressed and the remaining portion at the lower end of the hinge pin 42 is moved between the two link plates to allow separation of the two link plates.

Subsequently, after moving the support plate 50 toward the main bracket 10, the front link plate 30 is lowered and the striker 53 is pushed into the groove 82a of the latch 82 while contacting the rear link plate 20 again. When put in place, it is ready for normal use, ie active headrest operation.

1 is a perspective view of an operating state of the present invention,

2 is a plan view of FIG.

3 is a side view of FIG. 1;

4 is a cross-sectional view of the central portion of FIG.

5 is a non-operational perspective view of the present invention,

6 is a plan view of FIG. 5;

7 is a side view of FIG. 5;

8 is a cross-sectional view of the center part of FIG. 5.

* Description of the symbols for the main parts of the drawings *

10: main bracket 20: rear link plate

30: front link plate 41, 42, 43: hinge pin

50: support plate 53: striker

60: operating spring 70: spring

80: latch assembly 90: release device

Claims

A rear link plate connected to the main bracket by a hinge pin;

A front link plate connected to the rear link plate by a hinge pin;

A support plate connected to the front link plate by a hinge pin;

Active headrest comprising a.

The active headrest according to claim 1, wherein the actuating spring comprises a coil part provided on the main bracket side hinge pin, and a support part extending from both sides of the coil part to support the main bracket and the rear link plate.

The active headrest according to claim 1, wherein a striker is provided on a rear surface of the support plate, and a latch assembly for restraining the striker is provided on a front surface of the main bracket.

The latch assembly of claim 3, wherein the latch assembly is mounted to the main bracket, the latch is rotatably fixed to the mounting bracket by a hinge pin, and a groove into which a striker is inserted, and the latch bracket is pivotable to the mounting bracket. A locking jaw is fixed to the locking jaw of the latch and includes a pawl protruding from the front end of the latch;

Active headrest characterized in that.

The active headrest according to claim 1, wherein teeth are formed on the contact surfaces of the connecting ends of the rear link plate and the front link plate, respectively.

The active part of claim 5, wherein the connecting end portions of the rear link plate and the front link plate are formed to have a length in which a hinge portion connects them to each other, and a spring for contacting the connecting end portion is provided at the clearance portion. Headrest.