Headrest for vehicle with improved crash performance

Abstract

The present application discloses a headrest for a vehicle with improved collision performance, comprising: a headrest stay rod, which is arranged to form an integral body with a seat back and exposed at the upper end of the seat back; a support portion, which is connected to the headrest stay rod; and a rotation direction changing member, which is installed between the headrest stay rod and the support portion, thereby connecting the headrest stay rod and the support portion, and is configured to allow the rotation directions of the headrest stay rod and the support portion to be opposite to each other in the event of a rear-end collision.

Description

Technical Field

[0001] The present disclosure relates to a headrest mounted on a seat of a vehicle. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] A seat for a vehicle includes: a seat cushion configured to support a lower body of an occupant; a seat back installed to be connected to the seat cushion and configured to support an upper body of the occupant; and a headrest installed at an upper end of the seat back and configured to protect a head of the occupant.

[0004] The head restraint is used to support the occupant's head during normal times.

[0005] Specifically, the headrest prevents the cervical spine of the occupant from being injured due to the cervical spine bending backwards in the case of a rear-end collision. To this end, according to regulations for rear-end collisions, in the case of a rear-end collision, the headrest needs to contact and support the head of the occupant within a predetermined period of time.

[0006] However, because the seat back on which the headrest is mounted tilts toward the rear of the vehicle due to inertia in the event of a rear-end collision, the headrest is further away from the occupant, which further increases the time required for the headrest to contact the occupant's head.

[0007] A tilt mechanism may be applied to the headrest, but the tilt mechanism has a complicated structure and inevitably increases the number of components and the weight of the headrest. Summary of the invention

[0008] The present disclosure provides a headrest for a vehicle with improved crash performance, the headrest being configured to move forward in the event of a rear-end vehicle collision, thereby shortening the time required for the headrest to begin supporting an occupant's head.

[0009] A headrest for a vehicle with improved collision performance according to one form of the present disclosure includes: a headrest stay provided to be integrally formed with a seat back and exposed at an upper end of the seat back; a blower connected to the headrest stay; and a rotation direction changing member installed between the headrest stay and the blower and configured to allow a rotation direction of the headrest stay and a rotation direction of the blower to be opposite to each other in the event of a rear-end collision.

[0010] The support portion may include a fixing bracket therein, the fixing bracket being fastened to an inner surface of the support portion at one side thereof.

[0011] The rotation direction changing member may be a rotation coupling portion hingedly connected to the headrest stay at a lower end thereof and hingedly connected to the fixing bracket at an upper end thereof.

[0012] The headrest stay passing through the lower end of the rotation coupling portion and the hinge pin passing through the upper end of the rotation coupling portion and the fixing bracket may be parallel to each other.

[0013] Depending on the vehicle, the hinge pin may be positioned forward relative to the upper end of the headrest stay.

[0014] The rotation direction changing member may be a rotation coupling portion hingedly connected at an upper end thereof to an upper end of the headrest stay and hingedly connected at a lower end thereof to the fixing bracket.

[0015] Based on the vehicle, a lower end of the rotary coupling may be positioned forward relative to an upper end of the rotary coupling.

[0016] The hinge pin and the headrest stay may be arranged in parallel with each other in the width direction of the vehicle, wherein the hinge pin passes through a lower end of the rotation coupling portion and the fixing bracket, and the headrest stay passes through an upper end of the rotation coupling portion.

[0017] The support portion may have a guide hole through which the headrest stay passes.

[0018] The guide hole may be formed in a long hole shape formed in a longitudinal direction of the vehicle, and may be configured to limit an angle at which the headrest is tilted forward in the event of a rear-end collision to protect the head of the occupant.

[0019] At normal times, the headrest stay may be in contact with the rear end of the guide hole so that the support portion maintains a predetermined position relative to the headrest stay.

[0020] The headrest may include a pad made of a cushioning material and configured to surround the support portion.

[0021] At normal times, one side of the pad may be in contact with or spaced apart from the upper end of the seat back by a predetermined distance to restrict rotation of the headrest.

[0022] In the event of a rear-end collision, when the headrest stay rotates rearward due to inertia, the headrest and the support portion may rotate forward due to inertia applied opposite to the headrest stay.

[0023] According to another form of the present disclosure, a headrest with improved collision performance for a vehicle is installed at the upper end of a seat back and is configured to protect the head of an occupant in the event of a rear-end collision, and the headrest includes: a headrest stay, which is arranged to form an integral body with the seat back and exposed at the upper end of the seat back; a support portion; a rotational connection portion, which is arranged between the support portion and the headrest, thereby connecting the support portion to the headrest and is configured to allow the support portion to rotate in a direction opposite to the rotation direction of the headrest stay; and a pad, which is made of a buffering material and is configured to surround the support portion, wherein in the event of a rear-end collision, when the upper end of the seat back rotates toward the rear side of the vehicle, the support portion rotates and tilts.

[0024] The support portion may include therein a fixing bracket which is attached to the inner surface of the support portion at one side thereof and is hingedly connected to the rotation coupling portion at the other side thereof.

[0025] Depending on the vehicle, the hinge pin may be positioned forward relative to the upper end of the headrest stay, wherein the hinge pin articulately connects a swivel coupling portion through which the headrest stay passes, to the fixed bracket.

[0026] The headrest stay may pass through the support portion so that the upper end of the headrest stay is located in the support portion, and the support portion may have a guide hole through which the headrest stay passes, the guide hole being formed in a long hole shape and configured to limit a rotation angle of the support portion in the event of a rear-end collision.

[0027] According to the headrest for a vehicle with improved collision performance of the present disclosure as constructed above, in the event of a rear-end collision, the headrest moves forward even if the seat back is tilted toward the rear side of the vehicle, thereby shortening the time required for the headrest to contact the head of the occupant.

[0028] As described above, since the time required for the headrest to contact the occupant's head is shortened, the headrest can quickly support the occupant's head in the event of a rear-end collision, thereby reducing the occupant's injury.

[0029] Further areas of applicability will become apparent from the description provided herein.It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to better understand the present disclosure, various forms of the present disclosure given by way of example will now be described with reference to the accompanying drawings, in which:

[0031] Figure 1 is a perspective view showing a headrest for a vehicle with improved collision performance according to one form of the present disclosure;

[0032] Figure 2is a side view showing a headrest for a vehicle with improved crash performance according to one form of the present disclosure;

[0033] Figure 3 is a side view showing a seat installed with a headrest for a vehicle with improved collision performance according to one form of the present disclosure;

[0034] Figure 4A is a perspective view showing a state of a headrest for a vehicle with improved collision performance according to one form of the present disclosure before a rear-end collision;

[0035] Figure 4B is a perspective view showing a state of a headrest for a vehicle with improved collision performance according to one form of the present disclosure in the event of a rear-end collision;

[0036] Figure 5A and Figure 5B are perspective and side views showing a state of a headrest for a vehicle with improved collision performance according to one form of the present disclosure before a rear-end collision;

[0037] Fig. 6A and Figure 6B are perspective and side views showing an initial state of a headrest for a vehicle with improved collision performance according to one form of the present disclosure in the event of a rear-end collision;

[0038] Fig. 7A and Figure 7B are perspective and side views showing an intermediate state of a headrest for a vehicle with improved collision performance according to one form of the present disclosure in the event of a rear-end collision;

[0039] Fig. 8A and Figure 8B are perspective and side views showing a final state of a headrest for a vehicle with improved collision performance in a case of a rear-end collision according to one form of the present disclosure; and

[0040] Fig. 9 is a side view showing another form of a headrest for a vehicle with improved collision performance according to the present disclosure.

[0041] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. DETAILED DESCRIPTION

[0042] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, like reference numerals represent similar or identical parts and features.

[0043] Hereinafter, a headrest for a vehicle with improved collision performance according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0044] The headrest 30 for a vehicle with improved collision performance according to the present invention is mounted on the upper end of the seat back 20 to protect the head of the occupant in case of a rear-end collision, and includes a headrest stay 31, which is integrally provided with the seat back 20 and exposed at the upper end of the seat back 20, and a support portion 32 connected to the headrest stay 31. A rotation direction changing member is provided between the headrest stay 31 and the support portion 32, which allows the rotation direction of the headrest stay 31 and the rotation direction of the support portion 32 to be opposite to each other in case of a rear-end collision.

[0045] A seat for a vehicle includes: a seat cushion 10 mounted on a seat rail mounted on a floor panel and configured to support the lower body of an occupant; a seat back 20 hingedly connected to the seat cushion 10 at a lower end thereof and configured to support the upper body of the occupant; and a headrest 30 mounted at an upper end of the seat back 20.

[0046] In the present disclosure, when the seat back 20 rotates rearward due to inertia in the event of a rear-end collision, the headrest 30 rotates in a direction opposite to that of the seat back 20 .

[0047] To this end, a rotation direction changing member is provided to change the rotation direction of the headrest 30 and the rotation direction of the seat back 20 due to inertia so that the rotation directions of the headrest 30 and the seat back 20 are opposite to each other in the event of a rear-end collision. The headrest 30 is not directly connected to a headrest stay 31 mounted on the seat back 20 but is connected to the headrest stay 31 through the rotation direction changing member.

[0048] That is, the support portion 32 of the headrest 30 is not directly connected to the headrest stay 31. The rotation direction changing member is interposed between the support portion 32 and the headrest stay 31 to connect the support portion 32 and the headrest stay 31.

[0049] The support portion 32 refers to a member defining the structure of the headrest 30. A space is provided in the support portion 32, and the headrest 30 is connected to the headrest stay 31 in the support portion 32.

[0050] A pad 33 made of a cushioning material and configured to directly contact the head of the occupant is provided on the outside of the support portion 32. The pad 33 is used to surround the outside of the support portion 32, prevent the head of the occupant from directly contacting the support portion 32 made as a rigid body, and absorb impact when the support portion 32 contacts the head of the occupant.

[0051] The headrest stay 31 protrudes toward the upper end of the seat back 20 and is provided to be integral with the seat back 20. The upper end of the headrest stay 31 is formed in the width direction of the vehicle and serves as a rotation axis. The headrest stay 31 is mounted on the seat back 20 so as to be movable up and down, and the height of the headrest stay 31 is adjusted according to the height of the occupant.

[0052] The upper end of the headrest stay 31 is located in the support portion 32. A guide hole 32a in the shape of a long hole in the longitudinal direction of the vehicle is formed on a portion of the support portion 32 through which the headrest stay 31 passes, respectively. The guide hole 32a limits the rotation angle of the support portion 32 relative to the headrest stay 31, that is, the angle at which the support portion 32 tilts in the event of a rear-end collision. At normal times, the headrest stay 31 contacts the rear end of the guide hole 32a, so that the support portion 32 is maintained at a predetermined position relative to the headrest stay 31. In the event of a rear-end collision, the headrest stay 31 contacts the front end of the guide hole 32a to limit the angle at which the support portion 32 tilts.

[0053] The support portion 32 is not directly connected to the headrest stay 31 but is connected to the headrest stay 31 through a rotation direction changing member.

[0054] In this case, the rotation direction changing member may be a rotation coupling portion 34 which is hingedly connected at a lower end thereof to the upper end of the headrest stay 31 and is hingedly connected to the support portion 32 at an upper end of the rotation coupling portion.

[0055] The swivel coupling portion 34 is installed so that its lower end is passed through the upper end of the headrest stay 31, and thus, the swivel coupling portion 34 and the headrest stay 31 are hingedly connected. Figure 1 The line L1 - L1 shown in FIG. 8 is rotated relative to the headrest stay 31 .

[0056] The upper end of the rotating coupling part 34 is hingedly connected to one side of the support part 32. To this end, the fixing bracket 35 is fixed in the support part 32 and is hingedly connected to the upper end of the rotating coupling part 34. The hinge pin 36 is installed to pass through the upper end of the rotating coupling part 34 and the fixing bracket 35. The fixing bracket 35 can rotate around the hinge pin 36 so that the support part 32 can rotate around the hinge pin 36. Figure 1 The line L2-L2 shown in FIG. 1 is rotated.

[0057] The rotation axes of the upper and lower ends of the rotation coupling portion 34 (ie, line L1 - L1 and line L2 - L2 ) are parallel to each other and are disposed in the width direction of the vehicle.

[0058] In addition, the portion of the rotational coupling portion 34 hingedly connected to the support portion 32 is positioned forward relative to the portion of the rotational coupling portion 34 hingedly connected to the headrest stay 31. Figure 2As shown, line L4-L4 is positioned forward of line L3-L3, so that hinge pin 36 is positioned forward relative to the upper end of headrest stay 31 based on the vehicle. Likewise, the upper end of rotation coupling portion 34 is positioned forward relative to the lower end of rotation coupling portion 34 based on the vehicle.

[0059] At normal times, the pad 33 is in contact with the upper end of the seat back 20 or is spaced apart from the upper end of the seat back 20 by a predetermined distance, so that the headrest 30 maintains a predetermined angle relative to the headrest stay 31 at normal times. In this case, the headrest 30 is configured such that the hinge pin 36 is positioned in front of the upper end of the headrest stay 31, and the rotation coupling portion 34 is hingedly connected to the fixing bracket 35 through the hinge pin, and the rotation coupling portion 34 is hingedly connected to the upper end of the headrest stay.

[0060] However, in the case of a rear-end collision, the pad 33 is squeezed and deformed so that the support portion 32 can rotate. In addition, in the case of a rear-end collision, when the headrest stay 31 rotates backward due to inertia, the headrest 30 and the support portion 32 rotate forward due to inertia applied opposite to the headrest stay 31.

[0061] The operation of the headrest for a vehicle with improved collision performance according to the present disclosure will be described below.

[0062] like Figure 3 As shown, in the case of a rear-end collision, the acceleration generated by the rear-end collision is applied to the seat, and a force is generated due to inertia to rotate and tilt the seat back 20 backward (see Figure 3 ).

[0063] In this case, the rotary coupling 34 rotates in the opposite direction and is located Figure 3 The support portion 32 in the portion indicated by A in FIG. 1 is rotated in the direction opposite to the rotation direction of the seat back 20, as shown in FIG. Figure 4B As shown, the support portion 32 is tilted forward, thereby supporting the occupant's head more quickly.

[0064] The following will refer to FIG. 5A to FIG. 8B Describe the process in detail. FIG. 5A to FIG. 8B A state in which the rotation coupling portion 34 and the support portion 32 are rotated relative to the headrest stay 31 is shown.

[0065] During normal times (see Figure 5A and Figure 5B ), the headrest stay 31 contacts the rear end of the guide hole 32a, and the support portion 32 maintains an initial angle relative to the headrest stay 31. Therefore, the headrest 30 maintains an initial state relative to the seat back 20.

[0066] At the initial time of the rear-end collision (see Fig. 6A and Figure 6B), when the seat back 20 rotates backward due to inertia, the headrest stay 31 also moves backward, so that inertia is applied to the rotation coupling portion 34 and the support portion 32, whereby the rotation coupling portion 34 and the support portion 32 rotate in opposite directions, that is, tilt forward. Therefore, the support portion 32 starts to rotate in a direction that causes the support portion 32 to tilt forward (see Figure 6B ), and the headrest stay 31 also moves away from the end of the guide hole 32a, so that the headrest 30 rotates forward and tilts.

[0067] Thereafter, as the rear-end collision continued (see Fig. 7A and Figure 7B ), the rotating coupling portion 34 and the supporting portion 32 are further rotated forward and tilted.

[0068] At the same time, when the support portion 32 is further rotated and the headrest stay 31 contacts the end of the guide hole 32a opposite to the rear end of the guide hole 32a, the rotation coupling portion 34 and the support portion 32 are maximally tilted, so that the headrest 30 is also maximally tilted (see FIG. Fig. 8A and Figure 8B ).

[0069] In this state, the headrest 30 can contact the head of the occupant and thus support the head of the occupant more quickly, thereby reducing the injury of the occupant. In addition, the headrest 30 can meet the regulations on collision.

[0070] Fig. 9 Another form of a head restraint for a vehicle having improved crash performance according to the present disclosure is shown.

[0071] In this form, similar to the above-mentioned form, the support portion 32 of the headrest 30' is not directly connected to the headrest stay 31, but a rotation direction changing member (i.e., a rotation connecting portion 34) is provided between the support portion 32 and the headrest stay 31. In the event of a rear-end collision, the rotation direction changing member causes the support portion 32 to rotate in a direction opposite to the rotation direction of the headrest stay 31.

[0072] However, in the present form, the lower end of the rotational coupling portion 34 is hingedly connected to the fixing bracket 35 fastened to the support portion 32 , and the upper end of the rotational coupling portion 34 is hingedly connected to the upper end of the headrest stay 31 .

[0073] In addition, even in this form, the portion of the rotational coupling 34 connected to the support portion 32 is positioned forward relative to the portion of the rotational coupling 34 hingedly connected to the headrest stay 31. That is, the line L4-L4 is positioned forward of the line L3-L3.

[0074] Even in the present form, in the event of a rear-end collision, when the seat back 20 and the headrest 30 ′ rotate rearward due to inertia, the inertia applied to the support portion 32 causes the support portion 32 to rotate forward and tilt.

[0075] Therefore, the time required for the occupant's head to come into contact with the headrest 30 ′ can be shortened.

Claims

1. A headrest for a vehicle with improved collision performance, the headrest comprising: a headrest stay rod arranged to be integrally formed with a seat back and exposed at an upper end of the seat back; Support Department; as well as A rotation direction changing member is installed between the headrest stay and the support portion, and the rotation direction changing member is configured as follows: connecting the support portion and the headrest stay, and In the event of a rear-end collision, the rotation direction of the headrest stay and the rotation direction of the support portion are opposite to each other. Wherein, the rotation direction changing member is a rotation coupling portion, wherein the portion of the swivel joint that is hingedly connected to the support portion is positioned forwardly relative to the portion of the swivel joint that is hingedly connected to the headrest stay, and Wherein, in the event of a rear-end collision, when the headrest stay rotates rearward due to inertia, the headrest and the support portion rotate forward inversely relative to the headrest stay due to inertia.

2. The headrest according to claim 1, wherein: The support portion includes a fixing bracket fastened to an inner surface of the support portion.

3. The headrest according to claim 2, wherein: The rotating joint portion includes a lower end and an upper end, the lower end of the rotating joint portion is hingedly connected to the headrest stay, and the upper end of the rotating joint portion is hingedly connected to the fixing bracket.

4. The headrest according to claim 3, further comprising a hinge pin configured to pass through an upper end of the rotation coupling portion and the fixing bracket, in, The headrest stay rod configured to pass through a lower end of the rotation coupling portion is parallel to the hinge pin.

5. The headrest according to claim 4, wherein: Based on the vehicle, the hinge pin is positioned forward relative to an upper end of the headrest stay.

6. The headrest according to claim 2, wherein: The rotating joint part includes an upper end and a lower end. The upper end of the rotating joint part is hingedly connected to the upper end of the headrest stay, and the lower end of the rotating joint part is hingedly connected to the fixing bracket.

7. The headrest according to claim 6, wherein: Based on the vehicle, a lower end of the rotary coupling portion is positioned forward relative to an upper end of the rotary coupling portion.

8. The headrest according to claim 6, further comprising a hinge pin configured to pass through the fixing bracket and through a lower end of the rotation coupling portion, in, The hinge pin and the headrest stay passing through an upper end of the rotation coupling portion are arranged in a width direction of the vehicle and parallel to each other.

9. The headrest according to claim 1, wherein: The support portion includes a guide hole configured to be passed through by the headrest stay.

10. The headrest according to claim 9, wherein: The guide hole is formed in an elongated shape extending in a longitudinal direction of the vehicle, and is configured to restrict an angle at which the headrest is tilted forward in the event of a rear-end collision.

11. The headrest according to claim 10, wherein: In a case where a rear-end collision does not occur, the headrest stay is configured to come into contact with a rear end of the guide hole, and the support portion is configured to be held at a predetermined position relative to the headrest stay.

12. The headrest of claim 10, comprising a pad made of a cushioning material and configured to surround the support portion.

13. The headrest according to claim 12, wherein: In a case where a rear-end collision does not occur, one side of the pad is in contact with an upper end of the seat back or is spaced apart from the upper end of the seat back by a predetermined distance.

14. The headrest according to claim 12, wherein: When a rear-end collision occurs, the headrest stay rotates rearward due to inertia caused by the rear-end collision, while the headrest and the support portion rotate forward due to inertia applied in the opposite direction to the headrest stay.

15. A headrest for a vehicle with improved crash performance, wherein: The headrest is installed at the upper end of the seat back and protects the head of the occupant in the event of a rear-end collision, and includes: a headrest stay rod, arranged to be integrally formed with the seat back and exposed at an upper end of the seat back; Support Department; A rotational connection portion is provided between the headrest stay and the support portion, and the rotational connection portion is configured as follows: connecting the headrest stay and the support portion, and so that the rotation direction of the support portion is opposite to the rotation direction of the headrest stay; and a pad made of a cushioning material and configured to surround the support portion, wherein, in the event of a rear-end collision, when the upper end of the seat back rotates toward the rear side of the vehicle, the support portion is configured to rotate and tilt, wherein the portion of the swivel joint that is hingedly connected to the support portion is positioned forwardly relative to the portion of the swivel joint that is hingedly connected to the headrest stay, and Wherein, in the event of a rear-end collision, when the headrest stay rotates rearward due to inertia, the headrest and the support portion rotate forward inversely relative to the headrest stay due to inertia.

16. The headrest according to claim 15, wherein: The support portion includes a fixing bracket including a first side and a second side, the first side of the fixing bracket being attached to an inner surface of the support portion, and the second side of the fixing bracket being hingedly connected to the rotation coupling portion.

17. The headrest according to claim 16, further comprising a hinge pin configured to hingedly connect the rotational coupling portion with the fixed bracket, and the hinge pin is positioned forward relative to the upper end of the headrest stay based on the vehicle, wherein The headrest stay passes through the rotation coupling portion.

18. The headrest according to claim 15, wherein: The headrest stay is configured to pass through the support portion so that an upper end of the headrest stay is located in the support portion, and The support portion includes a guide hole formed in an elongated shape extending in a longitudinal direction, the guide hole being configured to be passed through by the headrest stay and to restrict a rotation angle of the support portion in the event of a rear-end collision.

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