KR102361529B1 - Inertia active head rest - Google Patents

Abstract

The present invention relates to an inertial active headrest. An inertia bar 38 is provided at the lower end of a locking bracket 35 that maintains a locked state, so that the locking state is released by rearward movement of the inertia bar 38 in case of a collision. (10) is rotated forward so that the headrest can support the passenger's head more quickly and safely.

Description

Inertia Active Headrest {INERTIA ACTIVE HEAD REST}

The present invention relates to a headrest of a vehicle seat, and more particularly, to an inertial active headrest that is automatically operated by collision inertia to actively support the head of a passenger.

A headrest is provided at the top of the seatback of the vehicle to support the head of the passenger. However, as in general driving, the head of the passenger is often separated from the headrest. Therefore, when a collision accident occurs while driving, the head is suddenly tilted back and neck injuries occur frequently. To prevent this, an active headrest has been developed that prevents neck injuries by moving the headrest forward in case of a collision to support the head of the passenger more quickly.

The conventional active headrest has a structure in which a back plate connected to the headrest is provided inside the seatback. Accordingly, in the event of a collision accident, the upper body of the passenger, which is tilted backward due to inertia, pushes the back plate backward, and thus the headrest moves forward to support the head of the passenger.

However, the active headrest provided with the back plate as described above has a structure in which the stay of the headrest is inserted and connected to the rigid structure connected to the back plate so that the back plate and the headrest operate integrally. Even under acceleration, the headrest moves by the force of the passenger's upper body, and this behavior of the headrest is continuously repeated while driving, causing rattle noise. In this case, there was a problem that the active headrest did not work properly.

Republic of Korea Patent Publication No. 10-1073958 (2011.10.10.)

Accordingly, the present invention has been devised to solve the above problems, and in a general driving state, the headrest is stably fixed so that the headrest does not flow and rattle noise does not occur. It is an object of the present invention to provide an inertial active headrest that is operated by the inertial movement of the component parts so that it can always be operated normally.

The present invention for achieving the above object includes a stay on which a headrest cushion is installed, a tube assembly rotatably installed on an upper pipe of a seatback frame and on which the stay is mounted, and between the tube assembly and the upper pipe. It is installed and usually maintains the locked state to prevent the tube assembly from rotating, releases the locking state in case of a collision, and rotates the tube assembly to move the headrest mounted on the stay forward.

The inertia driving device includes an outer fixing bracket fixed to the upper pipe, an inner fixing bracket fixed at intervals to the outer fixing bracket, an active shaft penetrating through the outer fixing bracket and the inner fixing bracket to be rotatably installed, and an active shaft. and an active spring having both ends fixed to the outer fixing bracket and rotating the active shaft to the front of the seat, a holder fixed to the outer periphery of the active shaft and having a locking groove formed on the outer circumferential surface, and mounting installed through the inner and outer fixing brackets Locking to maintain the locking state of the holder or to release the locking state depending on whether the locking protrusion and the locking groove are coupled to the shaft and the locking protrusion which is rotatably installed on the mounting shaft and is inserted into the locking groove at the upper end Includes an inertia bar installed at the bottom of the bracket and locking bracket.

The inertia driving device is equally installed on both sides of the tube assembly, and both ends of the inertia bar are connected to the lower ends of the locking brackets of the both sides of the inertia driving device.

A holding bracket is rotatably installed on the mounting shaft, and an upper end of the holding bracket is hung on the holder to form a stopper for suppressing rearward rotation (clockwise rotation) of the holder.

Teeth are formed on the outer circumferential surface of the holder, and teeth meshing with the teeth are formed on the corresponding surface of the holding bracket. and clockwise rotation (rotation that moves the headrest to the rear) is suppressed.

A return spring is installed between the inner fixing bracket and the locking bracket, and the return spring always applies a force to the locking bracket in a direction in which the locking protrusion contacts the outer circumferential surface of the holder.

A return spring is installed between the inner fixing bracket and the holding bracket, and the return spring always applies a force in a direction to mesh the teeth of the holding bracket with the teeth of the holder.

According to the present invention as described above, in a normal state, since the behavior of the headrest is restricted by the locking bracket and the holding bracket, no flow occurs in the headrest while driving, and thus rattle noise does not occur.

When the locking state by the locking bracket is released during a collision accident, the headrest is rotated forward by the active spring, so that the headrest can always operate in a certain amount. That is, there is an effect that the active headrest is always operated normally in the event of a collision accident, and the posture of the passenger does not affect the operating performance of the active headrest.

In addition, when the head of the passenger comes into contact with the headrest after the active headrest is activated, the headrest does not rotate backwards due to the restraining action of the holding bracket, thereby stably supporting the head of the passenger.

1 is an installation state diagram of an inertial active headrest according to the present invention;
2 is an exploded perspective view of an inertial active headrest according to the present invention;
3 is an assembled perspective view of an inertial active headrest according to the present invention;
4 is a locking state diagram of the inertial active headrest according to the present invention.
5 is an operating state diagram of an inertial active headrest according to the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The thickness of lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

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

1 to 3, the inertial active headrest according to the present invention is rotatable between a stay 10 on which a headrest cushion (not shown) is installed, and an upper pipe 40 of the seatback frame. It is installed and installed between the tube assembly 20 to which the stay 10 is mounted, and the tube assembly 20 and the upper pipe 40 to keep the locking state so that the tube assembly 20 is not normally rotated, When a collision accident occurs, the inertia driving device 30 is included to release the locking state and rotate the tube assembly 20 to move the headrest mounted on the stay 10 forward.

The stay 10 is a substantially 'П'-shaped article, and a headrest cushion is installed on the connected upper part, and the separated pole parts on both sides are inserted and installed in the tube assembly 20 .

The tube assembly 20 includes a connecting tube 21 installed horizontally, and stay receiving portions 22 fixed vertically on both sides of the connecting tube 21 in front.

The connecting tub 21 is installed in the middle part of the upper pipe 40 of the seatback frame in a state where it can be maintained or rotated in a fixed state through the inertia driving device 30 as a medium.

The stay accommodating part 22 holds the poles of the stay 10 as portions into which the poles on both sides of the stay 10 are inserted. Accordingly, the stay 10 is rotated integrally with the tube assembly 20 .

The inertia driving device 30 includes a pair of fixing brackets 31a and 31b, an active shaft 32, an active spring 33, a holder 34, a locking bracket 35, a holding bracket 36, and a mounting shaft. (37), the inertia bar (38), including return springs (39a, 39b).

The outer fixing bracket 31a is welded and fixed to the end of the upper pipe 40, and the connecting plate 31c is welded to the outer fixing bracket 31a to fix the inner fixing bracket 31b.

The active shaft 32 is inserted through both sides of the fixing brackets 31a and 31b and installed in a rotatable state. One end of the active shaft 32 is inserted and supported through a circular hole formed in the outer fixing bracket 31a, and the other end is the outside of the inner fixing bracket 31b (not the space between the two fixing brackets, but the outer part of the seatback center) part) and is coupled to one end of the connecting tube 21 of the tube assembly 20 . The active shaft 32 and the connecting tube 21 are fixed to each other in a state in which relative rotation is impossible, and are rotated integrally.

An active spring 33 in the form of a torsion spring is installed on one side of the outer periphery of the active shaft 32, one end of the active spring 33 is fixed to the active shaft 32, and the other end is fixed to the outer fixing bracket 31a. do.

In addition, a holder 34 in the form of a substantially circular ring is installed on one side of the outer periphery of the active shaft 32 . The holder 34 is fixed to the active shaft 32 and rotates integrally with the active shaft 32 .

On both sides of the fixing brackets 31a and 31b, the mounting shaft 37 is installed parallel to the active shaft 32 by being spaced a predetermined distance downward from the active shaft 32 .

A locking bracket 35 and a holding bracket 36 are rotatably installed on the mounting shaft 37 .

The locking bracket 35 has a locking protrusion 35a protruding from one side of the upper end, and a locking groove 34b (see FIG. 4) into which the locking protrusion 35a is inserted and hooked is on the outer periphery of the holder 34. is formed

At the lower end of the locking bracket 35, one end of the inertia bar 38 is inserted and fixed, and the other end of the inertia bar 38 is the same at the lower end of the locking bracket 35 of the inertia driving device 30 installed on the opposite side of the seat. connected to the structure. That is, the same inertia driving device 30 is installed at both ends of the connection tube 21 of the tube assembly 20 as shown in FIG. 1 , and the inertia bar 38 at the lower end of the locking bracket 35 of each inertia driving device 30 . Both ends of it are inserted and mounted.

When the locking protrusion 35a of the locking bracket 35 is inserted into the locking groove 34b of the holder 34, the active spring 33 is twisted to generate a restoring force, and the restoring force is the active shaft 32. It acts in the direction of rotating the seat forward, that is, counterclockwise in FIG. 4 .

A return spring (39a) is installed between the inner fixing bracket (31b) and the locking bracket (35), and the return spring (39a) always pushes the locking protrusion (35a) of the locking bracket (35) toward the holder (34). It works in the direction of giving.

The holding bracket 36 has teeth 36a (refer to FIG. 5 ) formed on one upper surface thereof, and corresponding teeth 34d are formed on the outer peripheral surface of the holder 34 .

In the holding bracket 36, the teeth 34d are always pushed toward the outer peripheral surface of the holder 34, that is, toward the teeth 34d by the return spring 39b installed between the inner fixing bracket 31b and the holding bracket 36. get power That is, the return spring 39b always rotates the holding bracket 36 toward the holder 34 .

When the teeth 36a and 34d of the holding bracket 36 and the holder 34 are meshed with each other, counterclockwise rotation of the holder 34 (rotation of the headrest forward) is possible, but the clockwise rotation of the holder 34 is possible. Directional rotation (rotation of the headrest to the rear) is formed in an impossible shape.

Meanwhile, as shown in FIG. 4 , a protrusion 32a is protruded from the outer periphery of the active shaft 32 , and a groove 34a into which the protrusion 32a is inserted and hung is formed on the inner circumferential surface of the holder 34 . As such, since the protrusion 32a is inserted into the groove 34a, the active shaft 32 and the holder 34 always have the same rotational behavior.

On the outer periphery of the holder 34, a stopper 34c on which one end of the holding bracket 36 is hung is formed to protrude from one side of the tooth shape 34d forming part. Rotation of the holder 34 in the clockwise direction is suppressed by the one end of the holding bracket 36a being caught by the stopper 34c.

Now, the operation and effect of the present invention will be described.

4 is a locking state diagram of the inertial active headrest according to the present invention, which is used in a general driving state.

In a normal state, as shown in FIG. 4 , the locking protrusion 35a of the locking bracket 35 is inserted into the locking groove 34b of the holder 34 , so that the counterclockwise rotation of the holder 34 is impossible.

Also, in this state, the upper outer portion of the holding bracket 36 is in contact with the stopper 34c of the holder 34, so that the holder 34 cannot rotate in the clockwise direction. Of course, at this time, since the teeth 36a and 34d of the holding bracket 36 and the holder 34 are engaged, the clockwise rotation of the holder 34 is suppressed even by these, but the rotation suppression by the stopper 34c is stronger. is the state

As described above, both directions of rotation of the holder 34 are impossible. Accordingly, the active shaft 32 fixed to the holder 34 does not rotate, and the connection tube 21 fixed to the active shaft 32 is also Since it is not rotated, the tube assembly 20 and the stay 10 are not rotated, and thus the headrest maintains a fixed state without moving forward and backward.

On the other hand, if a collision accident occurs while driving the vehicle, the inertia bar 38 moves to the rear of the vehicle due to inertia, so the locking bracket 35 rotates counterclockwise around the mounting shaft 37, so the locking protrusion 35a is It comes out of the locking groove (34b) of the holder (34). At this time, the teeth 36a and 34d only suppress the clockwise rotation of the holder 34, but do not suppress the counterclockwise rotation, so the active shaft 32 is rotated counterclockwise by the restoring force of the active spring 33. will rotate

Therefore, as the tube assembly 20 and the stay 10 connected to the active shaft 32 are rotated counterclockwise, the headrest on the top of the stay 10 moves to the front of the seat to support the head of the passenger more quickly. there will be

Meanwhile, as described above, when the head of a passenger moving backward comes into contact with the headrest moving forward, the headrest receives a force to be pushed backward from then on. However, even while the active shaft 32 is rotated forward (counterclockwise) by the active spring 33, the teeth 34d and 36a of the holder 34 and the holding bracket 36 due to the action of the return spring 39b. ) are always in contact with each other (counterclockwise rotation of the holder 34 is made in the contacted state), and the moment the head touches the headrest and tries to rotate in the opposite direction (clockwise), both teeth 34d, 36a) is engaged, the clockwise rotation of the holder 34 is suppressed, thereby preventing the headrest from being tilted back. In other words, in the event of a collision, the headrest that is momentarily moved forward can safely support the passenger's head by stably maintaining the forward-moved position despite the load applied to the passenger's head (load to the rear of the vehicle). .

On the other hand, in order to return the operated headrest to its normal use state, the coupling of the teeth 34d and 36a of the holder 34 and the holding bracket 36 must be separated. For this, it is necessary to rotate the holding bracket 36 clockwise around the mounting shaft 36, which is to install a lever connected to the holding bracket 36 and a cable wire on the outside of the seat or to the inside of the seat. It can be easily implemented by installing an actuator that directly drives the holding bracket 36 .

As described above, if the holding bracket 36 is rotated clockwise to release the coupling of the teeth 34d and 36a and then the headrest is forcibly tilted back, the active shaft 32 and holder 32 together with the tube assembly 20 is rotated clockwise, and at this time, the locking protrusion 35a is in contact with the outer circumferential surface of the holder 34 by the return spring 39a, so eventually the locking protrusion 35a is again inserted into the locking groove 34b, and re-locking is performed. will be done At this time, the active spring 33 is twisted again by the rotation of the active shaft 32, thereby preparing for the next use.

As described above, in the inertial active headrest according to the present invention, the front and rear movements of the headrest are constrained by the locking bracket 35 and the holding bracket 36 in a general driving state, so there is no flow in the headrest during driving. Since it does not generate rattle noise, you can feel more stable and firm head support, and since there is no noise, the quietness is improved during use.

In addition, instead of being operated by the passenger's upper body, the locking state is released by the inertial action of the component (inertia bar 38) and operated by the active spring 33 so that the headrest is always operated regardless of the passenger's posture. It has the advantage of being operated in a certain amount.

In addition, when the passenger's head comes into contact with the headrest after the active headrest is operated, the headrest does not rotate backwards again due to the restraining action of the holder 34 and the holding bracket 36's teeth 34d and 36a. can maintain stable head support.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art can make various modifications and equivalent other embodiments therefrom. You will understand that it is possible. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

10: stay 20: tube assembly
21: connection tube 22: stay receiving part
30: inertia drive device 31a, 31b: fixed bracket
32: active shaft 32a: protrusion
33: active spring 34: holder
34a: groove 34b: locking groove
34c: stopper 34d: tooth
35: locking bracket 35a: locking projection
36: holding bracket 36a: tooth shape
37: mounting shaft 38: inertia bar
39a, 39b: return spring 40: upper pipe

Claims (7)

A stay where the headrest cushion is installed,
A tube assembly rotatably installed on the upper pipe of the seatback frame and mounted with the stay;
It is installed between the tube assembly and the upper pipe to maintain the locking state to prevent the tube assembly from rotating normally, and to release the locking state in case of a collision accident and rotate the tube assembly to move the headrest mounted on the stay forward. including a drive,
The inertia driving device includes an outer fixing bracket fixed to the upper pipe, an inner fixing bracket fixed at a distance to the outer fixing bracket, an active shaft penetrating through the outer fixing bracket and the inner fixing bracket to be rotatably installed, and an active shaft. and an active spring having both ends fixed to the outer fixing bracket and rotating the active shaft to the front of the seat, a holder fixed to the outer periphery of the active shaft and having a locking groove formed on the outer circumferential surface, and mounting installed through the inner and outer fixing brackets Locking to maintain the locking state of the holder or to release the locking state depending on whether the locking protrusion and the locking groove are coupled to the shaft and the locking protrusion which is rotatably installed on the mounting shaft and is inserted into the locking groove at the upper end An inertia active headrest comprising a bracket and an inertia bar installed at the lower end of the locking bracket. delete The method according to claim 1,
The inertia driving device is installed equally on both sides of the tube assembly, and both ends of the inertia bar are respectively connected to the lower ends of the locking brackets of the both inertial driving devices. The method according to claim 1,
Inertial active, characterized in that a holding bracket is rotatably installed on the mounting shaft, and a stopper for hooking the upper end of the holding bracket is formed on the holder, thereby preventing the holder from rotating in the direction of moving the headrest rearward. headrest. 5. The method according to claim 4,
Teeth are formed on the outer circumferential surface of the holder, and teeth meshing with the teeth are formed on the corresponding surface of the holding bracket, and the engagement of these teeth allows the holder to rotate in the direction of moving the headrest forward and the holder An inertial active headrest, characterized in that it suppresses rotation in the direction of moving the headrest rearward. The method according to claim 1,
A return spring is installed between the inner fixing bracket and the locking bracket, and the return spring always applies a force to the locking bracket in a direction in which the locking protrusion contacts the outer peripheral surface of the holder. 6. The method of claim 5,
A return spring is installed between the inner fixing bracket and the holding bracket, and the return spring always applies a force in a direction to mesh the teeth of the holding bracket with the teeth of the holder.

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