KR100823200B1 - Apparatus for adjusting a tilting angle of a head rest - Google Patents

Abstract

A device for adjusting angle of a headrest for a vehicle is provided to maintain fixed state of the headrest which is moved to forward after collision by releasing locking state of a casing unit using link members. A device for adjusting angle of a headrest(3) for a vehicle comprises a pressing unit(10), a supporting plate(20), a casing unit(30), a rotating shaft, a brake piece, a first extension spring, a connecting bar(60), a first link member, a second link member, and a second extension spring. The pressing unit is placed in a seat back, and moves back and forth by load of a driver. The first link member has a tongue unit at one end, an assembling hole at the other end, and a torsion spring. The torsion spring of the first link member is formed on the assembling hole to rotate the tongue unit upward. The tongue unit contacts with a hanging pole while rotating upwards. The second link member has a hinge hole, an engaging hole, and a sill. The hinge hole where the other end of the connecting bar is linked is formed at one end of the second link member. The engaging hole is separated from the hinge hole and hinged with the first link member. The sill of the second link member prevents rotation of the first link member upwards. The other end of the second link member is hinged to supporting plate.

Description

Apparatus for adjusting a tilting angle of a head rest}

1 is a side view showing a state of a seated person when a vehicle crashes.

Figure 2 is an installation configuration showing the internal structure of the seat back is configured a vehicle headrest angle adjustment apparatus according to the present invention.

3 is a perspective view showing one embodiment according to the present invention.

Figure 4 is a side configuration view showing a support plate of the headrest angle adjustment device for a vehicle according to the present invention.

5 is an exploded view of the assembly of the headrest angle adjustment device for a vehicle according to the present invention.

Figure 6a to 6d are each a side view showing the operating state of the vehicle headrest angle adjustment device according to the invention.

** Description of reference numerals in the drawings **

1: seatback 2: side frame

3: headrest 4: headrest bar

10: pressing part 20: support plate

25: hinge hole of the support plate 26: through hole of the support plate

30: casing 34: angle adjustment piece

35: hinge hole of the casing 345: locking groove

40: rotation shaft 50: braking flight

51: locking rod 55: braking jaw

60: connecting bar 70: first link member

75: coupling hole of the first link member

80: second link member 81: coupling hole of the second link member

82: hinge hole 85: step

s40: spiral spring s50: first tensile spring

s70: torsion spring s80: second tension spring

a: through-hole of casing part

The present invention relates to a vehicle headrest angle adjusting device, and more particularly, by moving the headrest to the front by a force pushing the seat back in the event of a collision due to a vehicle accident, the seat head and the headrest during collision The head restraint angle of the vehicle that can prevent the neck injury caused by the second impact or the head of the seat is sharply flipped backward by maintaining the state after moving the headrest moved forward in case of collision. It relates to a control device.

In general, a seat back (backrest) of an automobile refers to a portion of an automobile seat that is close to the seat of the seat, and is an automobile part for providing a reaction force at the seat of the seat and the waist so that the seater can maintain comfort. The seat back is composed of a side frame serving as a support, a foam for providing shock absorption and comfort, an S-spring, a cover for maintaining aesthetics or shape, and the like.

In addition, a head rest is mounted on the upper side of the seat back, and the head rest is an important part that functions to comfortably support the head of the seater while driving and protects the seater's head during a car crash. .

On the other hand, when the car crashes at a low speed, such as about 10 to 16 km, injuries to the neck of the driver, etc., which is called a cervical sprain or whiplash injury.

This whiplash injury, or injury to the fracture of the neck bone, is due to the difference in relative speed between the upper body of the seat and the head. When the back collides, the upper body of the seat moves forward due to the impact of the seatback. As a result, the shear force acts on the neck area, and the shear force causes a sudden impact on the joints and muscles of the neck as well as causing injury to the neck joints.

This will be described in more detail with reference to FIG. 1.

As shown in Fig. 1, the headrest 3 is mounted on the upper end of the seatback 1 so as to support the head of the seat in the rear collision.

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 (1) momentarily, the head is in relative movement with the upper body by the inertia, and the relative movement of the occupant's neck is experienced as a result of considerable pressure on the neck joints. Will be added. Therefore, while the upper body of the seater is pushed forward for a very short time, the head and neck are leaned backwards, and the upper body and head of the seater are moved in opposite directions and pulled together. Serious injury occurs.

In order to solve the above problems, a number of adjusting devices capable of moving forward when a headrest fixed to a seatback is collided has been proposed. Among them, there is proposed a lever driving unit which operates by the force of pressing the seat back in the seat back, and an apparatus for momentarily moving the headrest forward by the cable operating force generated by the rotating lever rotated by the operation of the lever driving unit. It is.

However, the conventional apparatus for adjusting the angle of the headrest including the proposed technique has a problem that the headrest returns to its original state immediately after the pressing force applied to the seatback when the vehicle is crashed is removed. This had the disadvantage of not supporting the seat of the seat when only a second shock or a back that is derailed from the seat back.

The present invention, in order to solve the above-mentioned problems, the seatback is configured to recognize the force pushed by the seat to rotate the headrest forward to narrow the distance between the head of the seat, the rotation of the head restrained by the vehicle collision It is an object of the present invention to provide a vehicle headrest angle adjusting device capable of maintaining the rotated angle of the headrest so as not to return to its original state immediately afterwards.

The present invention for the above object, the pressing portion which is provided inside the seat back and moved back and forth by the load pressed by the upper body of the seat; A support plate fixed to each seat back side frame and having a hinge hole; Insertion pipes for inserting the headrest bar are installed to penetrate each of the upper and rear surfaces, and both side portions are provided to align the hinge hole formed in each of the two support plates, and a plurality of stops for each step in the front and rear rotation. A casing part provided with each of the angle adjusting pieces provided at a lower locking groove thereof; A rotating shaft arranged in each of the hinge hole of the support plate and the hinge hole of the casing part, the shaft being elastically supported by a spiral spring provided on the inner side of the casing part and having a resilient force to rotate the casing forward; One end is hinged to the support plate, the other end is provided with a locking rod protruding vertically, and the other end is provided with a braking jaw is selectively fitted into a plurality of locking grooves of the angle adjusting piece to control the rotation angle of the casing portion. Braking piece; A first tension spring, one end of which is connected to the engaging rod and the other end of which is fixed to the support plate to elastically support the braking jaw of the braking piece fitted into the locking groove of the angle adjusting piece; A connection bar having one end connected to the pressing part and bent to move the other end up and down in association with the front / rear movement of the pressing part; The tip is formed at one end, and the other end is provided with a coupling hole for hinge coupling and a torsion spring having a resilience force to rotate the tip portion upward to be provided on the coupling hole. A first link member; One end is provided with a hinge hole that is connected to the other end of the connecting bar, the hinge hole is spaced apart from the coupling hole for hinge coupling with the first link member, stepped to prevent the first link member from rotating upward A second link member hinged to the support plate; One end is connected to the second link member and the other end is fixed to the support plate to provide a vehicle headrest angle adjusting device comprising a second tension spring for elastically supporting the second link member.

In addition, the braking piece is formed on one surface facing the side of the casing portion in the support plate, the locking rod is configured to project through the through hole provided in the support plate to the other surface, each of the first link member and the second link member is It provides a vehicle headrest angle adjustment device characterized in that configured on the other side of the support plate.

The present invention relates to a vehicle headrest angle control device configured to seat the backrest to reduce the distance between the seatrest and the headrest of the seatrest by rotating the headrest forward by recognizing the force pushed by the seatrest will be.

The present invention is largely composed of a casing portion that includes a head restraint front / rear pivot, the support plate is hinged to both sides of the casing portion, adjusting the rotation angle of the casing portion and fixed to the side frame of the seat back, the support plate is It is provided inside the seatback and the seat of the seat is connected to the pressing portion for detecting and transmitting the force pushing the seatback.

Looking at the simple operation of the angle adjusting device according to the present invention as follows, with reference to the accompanying drawings to explain the embodiment of the invention in more detail.

First, the simple configuration of the present invention, the angle adjusting piece having a plurality of engaging grooves are configured on both sides of the casing portion and configured to have elasticity to rotate forwardly, that is, toward the seat of the seat, with respect to the installed support plate. The braking piece is fitted into one locking groove of the angle adjusting piece and is configured to maintain an upright position.

In the case of a rear collision of the vehicle, when the seat of the seat pushes the seatback, the pressing part senses a load thereon to move the first and second link members configured in the support plate to maintain the upright state of the headrest. Breaking the braking piece fitted in one engaging groove, the headrest is configured to be rotated forward by the elastic.

In addition, the headrest rotated forward is sufficiently configured to support the head of the spectator and the seater's head is able to withstand the pushing force to the rear, and the braking piece is attached to the other locking groove of the locking piece to maintain the forward rotation state. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, detailed descriptions of related well-known technologies or configurations may unnecessarily obscure the subject matter of the present invention. If it is determined that the detailed description will be omitted, and if the description according to the relationship between the components of the present invention described above and the like overlap, the description thereof will be omitted.

Figure 2 is an installation configuration showing the internal structure of the seat back is configured a vehicle headrest angle adjustment apparatus according to the present invention. 3 is a perspective view showing an embodiment according to the present invention.

Figure 4 is a side configuration showing a support plate of the headrest angle adjustment device for a vehicle according to the present invention, Figure 5 is an exploded view of the assembly of the headrest angle adjustment device for a vehicle according to the present invention.

As shown in FIG. 2, FIG. 3, or FIG. 5, the vehicle headrest angle adjusting device according to the present invention includes a pressing part 10 provided inside the seatback and a pair of support plates fixed to the seatback side frame, respectively. (20), the headrest bar is inserted into the hinge between the angle adjusting piece 34 and the two support plate 20 is provided on both sides and the casing portion 30 is provided on the upper side of the seat back (1) and , A pivot shaft 40 which is arranged on each of the support plate 20 and the casing part 30 and is elastically supported by the spiral spring s40, and a engaging rod 51 hinged to the support plate 20 and vertically protruding. And a braking piece 50 provided with a braking jaw 55 of the tip portion, a first tension spring s50 fixed at one end of the engaging rod 51 and a support plate 20, and one pressing portion ( 10) connected to the connecting bar 60, and one end of the torsion spring (s70) is in contact with the engaging rod (51) when rotated The first link member 70 supported by the second end, and the other end of the connecting bar 60 and the other end of the first link member 70 is hinged and the other end is hinged to the support plate 20 Link member 80, one end is connected to the second link member 80 and the other end is composed of a second tension spring (s80) fixed to the support plate 20.

 As shown in Figure 2, the pressing portion 10 is provided in the seat back (backrest) (1), but installed so as to correspond to the contact portion of the seat back portion of the seat and there is no limitation on the shape, but the seat is pressed by the seat back It is preferable to configure so as to cover the width of the seatback (1) so that it can be easily recognized.

In addition, the pressing part 10 may be installed in the space part with an empty space part inside the seatback 1 so that the pressing part 10 can be easily moved backward by the load pressed by the upper body of the seat. Thus, as shown in Figure 2, it is possible to bend the material such as wire, rods, etc. to form a ㅁ shape.

The support plate 20 is a base on which the braking pieces 50, the first and second tension springs s50 and s80, and the second link member 80, which will be described later, are installed. As long as it is a shape for the purpose, it is preferable that the shape is not limited.

As shown in Figure 4, the support plate 20 is provided with a hinge hole (25), is installed on each side of the upper half of the side frame (2) usually provided on both sides of the seat back (1), a pair of support plates ( The casing 30, which will be described later, is hinged between 20 and rotated forward / backward between the pair of support plates 20 to which the casing 30 is fixed.

The casing portion 30 is configured such that the insertion tube 34 into which the headrest 3 and bar 4 are inserted penetrates the upper and rear surfaces, respectively. It is sufficient that the shape is provided between the pair of support plates 20, and as an example, as shown in FIG. On the other hand, Figure 4 shows that the through-hole (a) is provided on the top surface for inserting the insertion tube 34, which is omitted.

In addition, both side portions of the casing part 30 are provided with hinge holes 35 of the casing part 30 which are provided to be aligned with the hinge holes 25 formed in the two support plates 20. The rotating shaft 40 to be described later is inserted into each of the hinge hole 25 of the support plate 20 and the hinge hole 350 of the casing portion 30.

In addition, as shown in Figure 4, both side portions of the casing portion 30 is provided with each of the angle adjusting piece 34 is provided with a plurality of engaging grooves 345 in the lower, the angle adjusting piece 34 is casing Rotating state by adjusting the stage of rotation during the forward / rear rotation with respect to the support plate 20 on which the part 30 is fixed, that is, the angle of rotation of the casing part 30 (upright state, rotated forward when the vehicle collides). To maintain.

The locking groove 345 of the angle adjustment piece 34 of Figure 4 is composed of two as an embodiment, each locking groove 345 can correspond to the upright state, the state rotated forward when the vehicle crashes. have.

As described above, the pivot shaft 40 is arranged in both the hinge hole 25 of the support plate 20 and the hinge hole 35 of the casing portion 30. In particular, the casing portion 30 is provided on the inner surface is configured to be elastically supported by a spiral spring (s40) having a resilient force to rotate the casing portion 30 forward.

As shown in Figures 3 to 4, each of the two ends of the spiral spring (s40) is composed of a rotating shaft 40 and the inner surface of the casing portion 30, so that the casing portion 30 is forward The state to be rotated is maintained.

On the other hand, in a normal vehicle state, the headrest 3 is configured to stand upright, the angle adjustment device for a vehicle headrest 3 according to the present invention is also configured to stand up the headrest 3 in a normal state. This is because the braking piece 50 is inserted into one locking groove 345 of the angle adjusting piece 34 provided in the casing part 30 so as not to be rotated forward by the helical spring s40, and the rotation is interrupted. to be.

The braking piece 50 is preferably one end is hinged to the support plate 20, the engaging portion is hinged is eccentric to one side and the other end is preferably made of a cam shape consisting of the tip portion. The tip portion formed at the other end of the braking piece 50 is selectively fitted into a plurality of engaging grooves 345 of the angle adjusting piece 34 to constitute a braking jaw 55 for controlling the rotation angle of the casing part 30.

In addition, the other end of the braking piece 50 is formed with a engaging rod 51 protruding vertically is connected to one end of the first tension spring (s50), the braking jaw (55) of the braking piece (50) It is elastically supported in a state of being fitted in the locking groove 345 of the angle adjusting piece 34.

On the other hand, the braking piece 50 is hinged to the support plate 30 is configured to be configured on the inner surface of the support plate, that is, the surface facing the side of the casing portion 30 in the support plate 20.

Accordingly, as shown in FIG. 5, the locking bar 51 protruding vertically of the braking piece 50 penetrates the outer surface of the support plate 20, which is the other surface, through the through hole 26 provided in the support plate 30. It is preferable to be configured to protrude. In addition, each of the first link member 70 and the second link member 80 connected thereto, which is a means for pushing down the catching rod 51 of the braking piece 50, is configured on an outer surface of the support plate 30. It is desirable to.

The first link member 70 is preferably made of a cam shape that is coupled to the second link member 80 and the coupling hole (75) hinged to the other side and one end is configured. In addition, a torsion spring s70 is provided on the coupling hole 75 and has a resilience force to rotate the tip portion upward.

The first link member 70 is moved downward as the second link member 80 is moved downward. At this time, to form the shape so that the tip portion is in contact with the engaging rod (51).

On the other hand, the first link member 70 is supported by a torsion spring (s70) having an elastic force to rotate upwards so that the first link member 70 pushes down the braking piece 50 downwardly When returning to the original state again (see FIGS. 6C and 6D), the bottom surface of the braking piece 50 may be slid to be moved. The operation will be described in more detail with reference to the following embodiments.

The coupling hole 75 of the first link member 70 is hinged to correspond to the coupling hole 81 of the second link member 80, and the second link member 80 is first formed on an upper side thereof. Stepped to prevent the link member 70 is rotated upwards 85 is provided, the other end is hinged to the support plate 20 is configured.

In addition, one end of the second link member 80 has a hinge hole 82 provided to connect with the other end of the connection bar 60. Preferably, the hinge hole 82 and the coupling hole 81 are spaced apart from each other.

In addition, the other end of the second link member 80 is connected to one end of the second tension spring (s80) fixed to one side connected to the support plate 20. The second tension spring s80 is preferably configured to have a spring force for returning to the original state when the second link member 80 is rotated.

The hinge hole 82 of the second link member, which is formed at one end, is connected to the pressing part 10 and bent to move the other end up and down in association with the front / rear movement of the pressing part 10. It is connected to the other end of the connection bar 60 is formed.

Accordingly, the second link member 80 may be configured such that the tip of the first link member contacts the locking bar 51 to push the braking piece 50 downward as the connecting bar 60 moves downward. It is preferable to select and configure the configuration positions of the first and second link members.

On the other hand, Figures 6a to 6d each shows a side view showing the operating state of the vehicle headrest angle adjustment device according to the present invention, look at the operation with reference to the drawing as follows.

6A illustrates a side state in a normal state, that is, not a normal state, that is, a state such as a collision of a vehicle. It can be seen that the casing part 30 supporting the headrest 3 is maintained in an upright state. This is because the braking jaw 55 of the braking piece 50 is fitted into one of the engaging grooves 345 of the angle adjusting piece 34 formed on the side of the casing part 30. The casing portion 30 has a property of always rotating forward (counterclockwise) by the spiral spring s40 formed on the inner surface, but is maintained in an upright position by the braking piece 50.

6B and 6C each show a state in which the seat occupant has a load toward the seatback 1 as in the collision of the vehicle.

First, as shown in FIG. 6B, when the pressing part 10 formed inside the seatback 1 is pushed backward by the load of the seat, the pressing part 10 is also moved rearward inside the seatback 1 (not shown in the drawing). ). The moved pressing part 10 pulls down the connection bar 60 connected thereto.

When the connecting bar 60 is moved downward, the second link member 80 connected thereto rotates downward (clockwise). The lower surface of the tip portion of the first link member 70 comes into contact with the catching rod 51 formed on the braking piece 50, thereby pushing down the catching rod 51.

When the locking bar 51 of the braking piece 50 moves downward, the braking jaw 55, which is the tip of the braking piece 50, which is integrally formed therewith, is moved downward (clockwise), wherein the braking jaw ( 55 is separated from one locking groove 345 of the angle adjusting piece 34 as shown in FIG.

This removes the blocking element to which the casing portion 30 intends to rotate forward (counterclockwise). Therefore, as shown in Figure 6c, the casing portion 30 including the headrest (3) is rotated forward.

Next, the braking jaw 55 is rotated upward again by the first tension spring s50 connected to the catching bar 51 of the braking piece 50, which is the other locking groove 345 of the angle adjusting piece 34. ) Therefore, the angle after rotation of the casing part 30 is fixed by the said braking piece 50 again. This is to butter the impact of contact with the seat of the seat.

6C and 6D, respectively, show a process in which the first link member 70 is returned by each of the second link member 80 and the second tension spring s80 connected thereto.

As shown in FIG. 6C, first, when the first link member 70 rotates clockwise to return to its original state, the upper surface of the tip of the first link member comes into contact with the lower surface of the catching rod 51.

At this time, since the first link member 70 is constituted by the second link member 80 and the hinge coupling, the tip portion of the first link member 70 is rotated downward to be bent. Then, the upper surface of the tip portion of the first link member 70 is moved while sliding the outer peripheral surface of the locking bar (51).

Next, the first link member 70 is rotated upward by the torsion spring s70 configured to be connected thereto and returned to its original state, and the first link member 70 is moved by the step of the second link member 80. It can no longer be rotated clockwise, and returns to its original state as shown in FIG. 6D.

On the other hand, the collision state of the vehicle is all finished, and the operation for returning the front pivoted headrest 3 to the normal state as shown in FIG. 6D is reversed. However, first, the seater pushes his back to the seatback 1 and presses the pressing portion 10, and at the same time, the headrest 3 is pushed backward by hand to stand upright.

Although the above has been described above with reference to a preferred embodiment according to the present invention, the technical idea of the present invention is not limited thereto, and each component of the present invention is changed or modified within the technical scope of the present invention for achieving the same object and effect. Could be.

As described above, the headrest angle adjustment device for a vehicle according to the present invention is linked to the seat by the force of pressing the seat back when the collision due to the vehicle accident is minimized the space between the seat and the head restraint of the seat in case of collision There is an advantage to prevent.

In addition, the present invention has the advantage of preventing the injury of the seated person to further maintain the state after moving the headrest moved forward in the event of a collision.

Claims (2)

A pressing part provided inside the seat back and moving back and forth by a load pressed by the upper body of the seat; A support plate fixed to each seat back side frame and having a hinge hole; Insertion pipes for inserting the headrest bar are installed to penetrate each of the upper and rear surfaces, and both side portions are provided to align the hinge hole formed in each of the two support plates, and a plurality of stops for each step in the front and rear rotation. A casing part provided with each of the angle adjusting pieces provided at a lower locking groove thereof; A rotating shaft arranged in each of the hinge hole of the support plate and the hinge hole of the casing part, the shaft being elastically supported by a spiral spring provided on the inner side of the casing part and having a resilient force to rotate the casing forward; One end is hinged to the support plate, the other end is provided with a locking rod protruding vertically, and the other end is provided with a braking jaw is selectively fitted into a plurality of locking grooves of the angle adjusting piece to control the rotation angle of the casing portion. Braking piece; A first tension spring, one end of which is connected to the engaging rod and the other end of which is fixed to the support plate to elastically support the braking jaw of the braking piece fitted into the locking groove of the angle adjusting piece; A connection bar having one end connected to the pressing part and bent to move the other end up and down in association with the front / rear movement of the pressing part; The tip is formed at one end, and the other end is provided with a coupling hole for hinge coupling and a torsion spring having a resilience force to rotate the tip portion upward to be provided on the coupling hole. A first link member; One end is provided with a hinge hole that is connected to the other end of the connecting bar, the hinge hole is spaced apart from the coupling hole for hinge coupling with the first link member, stepped to prevent the first link member from rotating upward A second link member hinged to the support plate; One end is connected to the second link member and the other end is fixed to the support plate comprising a second tension spring for resiliently supporting the second link member vehicle headrest angle adjustment device. The method of claim 1, The braking piece is formed on one surface of the support plate facing the side of the casing portion, the engaging rod is projected to the other surface through the through hole provided in the support plate, each of the first link member and the second link member of the support plate Vehicle headrest angle adjustment device, characterized in that configured on the other side.

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