KR20070054282A - Active headrest of seat for vehicle - Google Patents

Abstract

The present invention relates to an active headrest of a vehicle seat that reduces head injury by moving the headrest upward and forward in response to a passenger's torso reaction in a rear collision, and is located below the seatback frame 110. A lumbar support member 120 supporting and supporting the lumbar spine of the passenger; A transverse connecting member (130) positioned laterally in the seatback frame (110) of the upper end of the lumbar support member (120); First and second link brackets 140 and 150 which are fixed to both ends of the lateral connecting member 130 and eccentric with the fastening part with the lateral connecting member 130 to be hinged to the seat back frame 110. )and; One end thereof is connected to the lumbar support member 120, and the other end thereof is the first and second link brackets 140 at positions eccentric with the fastening portions of the lateral connecting member 130 and the seat back frame 110. First and second link wires 160 and 170 which are hinged to each other; A headrest connecting member 180 fixed in the vertical direction to the lateral connecting member 130 and having a headrest fixed at an upper end thereof; The guide member 190 is fixed to the seat back frame 110 to guide the operation direction of the headrest connecting member 180, thereby improving the seating comfort of the upper end of the seat back, and has an excellent response when colliding. have.

Active headrest, lumbar support member, seating comfort, link bracket.

Description

Active headrest of seat for vehicle

1 is a view showing the entire seat equipped with a conventional active headrest,

2 is a view for explaining the structure of a conventional active headrest,

3 is an exploded view showing the main parts of the active headrest according to the present invention;

4 is an enlarged view of a portion of an active headrest in accordance with the present invention.

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

110: seat back frame 120: lumbar support member

130: horizontal connecting member 140: first link bracket

150: second link bracket 160: first link wire

170: second link wire 180: headrest connection member

190: guide member

The present invention relates to an active headrest of a vehicle seat, and in particular, the headrest moves quickly upward and forward by an operation of a plate member installed in the seatback during a rear collision and responding to a passenger's body reaction force so that the head and neck of the occupant It relates to an active headrest of a vehicle seat for reducing injuries of the site.

The active headrest is designed to reduce the injuries of the passenger's head and neck by rapidly moving the headrest upward and forward by using the load applied to the active plate mounted in the seatback by moving the upper body of the passenger rearward in the rear collision. It is a device for.

1 is a view showing the entire seat on which a conventional active headrest is mounted.

Referring to FIG. 1, an active plate 20 is positioned in the seatback frame 10 in a transverse direction, and both bottom ends of the active plate 20 are rotatably fastened to the seatback frame 10 by links. .

2, the fixing bracket 11 is bolted to the seat back frame 10 adjacent to the active plate 20, and the fixing bracket 11 is hinged to the first link 12 hinged to the fixing bracket 11. The second link 13 is connected, and the second link 13 is welded to the lower end of the active plate 20. In this case, the second link 13 may be welded and fixed to the pipe member 21 to be described below, but basically the second link 13 is integrally formed with the active plate 20.

Meanwhile, two pipe members 21 having symmetrical shapes are welded and fixed to the active plate 20, and headrests 22 supporting the head of the passenger are fixed to the upper ends of the two pipe members 21. .

The guide pipe 14 is fixed to the upper end of the seat back frame 10, and two guide brackets 15 having a 'U' shape are fixed to the guide pipe 14.

Pipe members 21 are inserted into the guide brackets 15 to guide the moving direction of the pipe members 21 when the active plate 20 is operated.

The return spring 23 is connected between the seat back frame 10 and the active plate 20 to provide a return force for returning to the original position after the active plate 20 is operated.

Referring to FIG. 1, an operation example of an active headrest of a conventional vehicle seat configured as described above is described. When an impact F1 is generated due to a rear collision, the passenger of the seat is moved backward by a reaction force F2 due to a rear impact. Done.

The passenger's rear reaction force F2 is transmitted to the active plate 10 installed in the seat, and the lower end of the active plate 10 is fixed to the bracket 11 of the seat back frame 10 to which the link member is fastened, and the first link ( The active plate 10 moves upward and forward while rotating with the hinge axis between the 11) and the second link 12 as the rotational axis. At the same time, the headrest portion 22 fixed to the upper end of the active plate 10 moves to the back of the passenger's back head and closely adheres to the back of the passenger's back head.

On the other hand, after the operation of the active plate 10, the active plate 10 is returned to its original position by the return spring 23.

However, the active headrest of such a conventional vehicle seat is positioned by protruding the active plate forward (i.e., set in a position closer to the passenger's torso) in order to increase the operating performance, in which case the passenger When the body is in close contact with the seat back, it is confirmed that there is a problem that the seating feeling is lowered by feeling a foreign object at the protruding position of the active plate.

In addition, in the conventional active headrest, the seatback frame and the active plate are connected by two link members to perform the operation. Therefore, when the reaction force against the collision impact is applied to the active headrest, the response is slow and the active headrest operates smoothly. There is a problem that is difficult to be.

Next, in the conventional active headrest, there is a problem that the active plate and the pipes cost a lot of weight and increase.

The present invention is to solve the above-mentioned shortcomings, in the active headrest that the headrest is operated by the reaction force by the impact acting on the passenger in the rear collision, the passenger's seating feeling is impaired like the conventional active plate It is to provide an active headrest of a vehicle seat that can improve the ride comfort by eliminating the configuration, and can improve the operation response of the active headrest.

The active headrest of the vehicle seat of the present invention is a seatback in an active headrest of a vehicle seat for protecting the head or neck of the passenger by moving the headrest upward and forward in response to the passenger's reaction force due to a collision impact. A lumbar support member positioned under the frame and supporting the lumbar spine of the passenger; A transverse connecting member positioned laterally in the seatback frame at the upper end of the lumbar support member; First and second link brackets fixed to both ends of the lateral connecting member, the first and second link brackets being eccentric with the fastening part with the lateral connecting member and hinged to the seat back frame; One end is connected to the lumbar support member, the other end and the first and second link wires which are hinged to each of the first and second link brackets in an eccentric position with the fastening portion of the transverse connecting member and the seat back frame and ; A headrest connecting member fastened in the vertical direction to the lateral connecting member and fixed at an upper end thereof; And a guide member fixed to the seat back frame to guide the operation direction of the headrest connecting member.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3, the active headrest of the present invention includes a lumbar support member 120 positioned below the seat back frame 110 to surround and support a passenger's lumbar spine; A transverse connecting member (130) positioned laterally in the seatback frame (110) of the upper end of the lumbar support member (120); First and second link brackets 140 and 150 which are fixed to both ends of the lateral connecting member 130 and eccentric with the fastening part with the lateral connecting member 130 to be hinged to the seat back frame 110. )and; One end thereof is connected to the lumbar support member 120, and the other end thereof is the first and second link brackets 140 at positions eccentric with the fastening portions of the lateral connecting member 130 and the seat back frame 110. First and second link wires 160 and 170 which are hinged to each other; A headrest connecting member 180 fixed in the vertical direction to the lateral connecting member 130 and having a headrest fixed at an upper end thereof; It is fixed to the seat back frame 110 is characterized in that it comprises a guide member 190 for guiding the operation direction of the headrest connection member 180.

The seatback frame 110 forms a basic frame of the seat together with the seatback cushion frame, which is not shown, and various components mounted in the seat are assembled and have a structure and rigidity capable of supporting the entire seat.

The lumbar support member 120 has a structure capable of supporting the lumbar spine of the passenger when the passenger is seated on the seat, and is located approximately at the bottom of the seatback frame, and may have a curved shape to sufficiently surround the lumbar spine.

The lateral connecting member 130 has a pipe shape, and the first and second link brackets 140 and 150 are fixed to both ends, and the seat back frame 110 is formed by the first and second link brackets 140 and 150. It is assembled so as to be rotatable. At this time, the horizontal connecting member 130 is installed in the transverse direction on the seat back frame 110 of the upper lumbar support member 120.

The first and second link brackets 140 and 150 have the same shape.

As shown in FIG. 4, the second link bracket 150 (same as the first link bracket) has a substantially triangular shape, and a horizontal connecting member 130 is firmly fixed to the center by a fastening means such as welding or bolt. .

The upper end portion of the second link bracket 150 is hinged to the seat back frame 110 by a hinge pin 151.

In addition, the second link wire 170 is fixed to the other corner portion of the second link bracket 150.

The second link bracket 150 is rotated with respect to the seat back frame 110 by the operation of the second link wire 170, and thus the lateral connecting member 130 fixed to the second link bracket 150. While rotating the headrest connecting member 180 is pushed up.

Meanwhile, the first link bracket 140 is also hinge-assembled to the seat back frame 110 in the same manner as the second link bracket 150, and the first link wire 160 is fixed.

Lower ends of the first and second link wires 160 and 170 are connected to the lumbar support member 120, and upper ends thereof are fixed to the first link bracket 140 and the second link bracket 150, respectively.

At this time, the fastening positions with the first and second link brackets 140 and 150 on the upper portions of the first and second link wires 160 and 170 are as described above. The fastening portion of is determined in an eccentric position.

Meanwhile, the upper ends of the first and second link wires 160 and 170 may be directly fastened to the first and second link brackets 140 and 150, so as to connect the first and second link brackets 140 and 150. The auxiliary wire 161 is connected in the lateral direction, and upper ends of the first and second link wires 160 and 170 may be firmly fixed to the auxiliary wire 161 by welding or the like.

In particular, in the present invention, the first and second link wires 160 and 170 have a symmetrical structure in the vertical direction, and a wire connection member 162 for fixing the two link wires to each other in the transverse direction is further configured. Thus, the first and second link wires 160 and 170 may be integrally operated so that the reaction force of the passenger's body may be uniformly transmitted when the lumbar support member 120 is operated.

The wire connecting member 162 may be provided by a steel plate or the like superimposed on the first and second link wires 160 and 170 and firmly fixed by welding.

The headrest connecting member 180 is inserted into the lateral connecting member 130 and the hollow fastening member 181 so as to be rotatable, and the two pipe members 182 welded and fixed in the vertical direction of the fastening member 181. It may be made of. The headrest portion which is in direct contact with the occipital head of the passenger is fixed to the upper end of the pipe member 182.

The guide member 190 is firmly fixed to the upper end of the seat back frame 110 by bolts or welding, and the guide bracket 191 is integrally provided to support the pipe member of the headrest connection member 180.

Looking at the operation example of the active headrest of the vehicle seat of the present invention configured as described above are as follows.

When a rear collision occurs, the passenger sitting on the seat pushes the upper body backward and the body reaction force of the passenger acts on the lumbar support member 120 at the bottom of the seat back frame 110.

The first and second link wires 160 and 170 connected to the lumbar support member 120 are pulled by the body reaction force of the passenger acting on the lumbar support member 120, and the first and second link brackets 140 connected thereto are connected thereto. At the same time as the 150 is rotated with respect to the seat back frame 110, the headrest connecting member 180 is upward while the horizontal connecting member 130 fixed to the first and second link brackets 140 and 150 rotates to the top. Moving forward to support the occipital head of the occupant.

As described above, the active headrest of the present invention is laterally connected by the first and second link brackets hinged to the seatback frame in conjunction with the body reaction force acting on the lumbar support member, thereby operating the headrest. However, the response response of the headrest is superior to the headrest operation by the link structure.

In addition, since the lumbar support member provided at the lower end of the seatback frame is used, the seating upper end seating feeling at ordinary times can be improved as compared with the conventional one.

As the active headrest of the vehicle seat of the present invention as described above, a lumbar support member for supporting the lumbar spine of the passenger is used as a means for reacting to the body reaction force of the passenger due to the impact during the collision, and the seat back in conjunction with the lumbar support member Since the headrest is operated by using a link structure having only one hinge point on the frame, it is possible to improve the seating comfort of the upper end of the seatback compared to the conventional one, and has an excellent effect of the operation response of the active headrest during collision. . In addition, the configuration is simple compared to the prior art has the effect of reducing the weight and cost of the sheet.

Claims (2)

In the active headrest of the vehicle seat for protecting the head or neck portion of the passenger by moving the headrest forward in response to the passenger's reaction due to the collision impact, A lumbar support member positioned below the seat back frame and supporting the lumbar spine of the passenger; A transverse connecting member positioned laterally in the seatback frame at the upper end of the lumbar support member; First and second link brackets fixed to both ends of the lateral connecting member, the first and second link brackets being eccentric with the fastening part with the lateral connecting member and hinged to the seat back frame; One end is connected to the lumbar support member, the other end and the first and second link wires which are hinged to each of the first and second link brackets in an eccentric position with the fastening portion of the transverse connecting member and the seat back frame and ; A headrest connecting member fastened in the vertical direction to the lateral connecting member and fixed at an upper end thereof; An active headrest of a vehicle seat, characterized in that the guide member is fixed to the seat back frame to guide the operation direction of the headrest connecting member. The active headrest of a vehicle seat according to claim 1, wherein the first and second link wires are symmetrically in the vertical direction and further include a wire connection member fixedly connected to each other in the transverse direction.

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