Automatic headrest

Abstract

The present disclosure provides an automatic headrest including: a headrest cushion configured to couple to a stay rod of a vehicle seat back; an actuation module configured to couple to the stay rod; a cushion bracket configured to couple to a rear surface of the headrest cushion; an actuation link having a plate shape; a motor link, wherein one side of the motor link is configured to couple to the actuation module and the other side of the motor link is configured to extend downward; and a guide link having a plate shape, wherein one side of a top portion of the guide link is configured to couple to the cushion bracket, the other side of the top portion of the guide link is configured to couple to the actuation link, and a bottom portion of the guide link is configured to couple to the motor link.

Claims

1. An automatic headrest comprising: a headrest cushion configured to couple to a stay rod of a vehicle seat back; an actuation module configured to couple to the stay rod, the actuation module comprising: a motor, and a screw configured to move forward and backward by the motor; a cushion bracket configured to couple to a rear surface of the headrest cushion, the cushion bracket comprising: an extension portion configured to extend to a rear side of the headrest cushion and to have a slit hole formed thereof, and a coupling portion configured to protrude to the rear side of the headrest cushion; an actuation link having a plate shape, the actuation link configured to: have a predetermined thickness, couple to the screw of the actuation module at the rear side of the headrest cushion, and have a guide unit with a slit hole configured to extend on the top of the actuation link, and a hinge portion configured to extend on the bottom of the actuation link to move forward and backward when the actuation module is actuated; a motor link, wherein one side of the motor link is configured to couple to the actuation module and the other side of the motor link is configured to extend downward; and a guide link having a plate shape, wherein one side of a top portion of the guide link is configured to couple to the cushion bracket, the other side of the top portion of the guide link is configured to couple to the actuation link, and a bottom portion of the guide link is configured to couple to the motor link.

2. The automatic headrest of claim 1, wherein the coupling portion of the cushion bracket is configured to form on the bottom of the extension portion of the cushion bracket.

3. The automatic headrest of claim 1, wherein a plurality of the coupling portions and the extension portions of the cushion bracket are configured to form to be spaced apart from each other by a predetermined distance, the guide unit and the hinge portion are configured to form on both surfaces of the actuation link, respectively, and the hinge portion of the actuation link is configured to pin-couple to the coupling portion to be pivotable.

4. The automatic headrest of claim 1, wherein the bottom of the guide link is configured to pin-couple to the other side of the motor link.

5. The automatic headrest of claim 1, wherein one side of the guide link is configured to pin-couple to the slit hole of the extension portion of the cushion bracket and to move within the slit hole of the extension portion by the actuation of the actuation module.

6. The automatic headrest of claim 1, wherein the other side of the guide link is configured to pin-couple to the slit hole of the guide unit of the actuation link and to move within the slit hole.

7. The automatic headrest of claim 1, further comprising a cover configured to cover the rear surface of the headrest cushion at the rear side of the headrest cushion.

Description

DRAWINGS

(1) In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which:

(2) FIG. 1 is a diagram illustrating an automatic headrest in the related art;

(3) FIG. 2 is a diagram illustrating an automatic headrest;

(4) FIG. 3 is a diagram illustrating a shape after an actuation of FIG. 2; and

(5) FIG. 4 is a diagram illustrating, in detail, a rear side of a headrest cushion of FIG. 3.

(6) 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

(7) 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, corresponding reference numerals indicate like or corresponding parts and features.

(8) FIG. 2 is a diagram illustrating an automatic headrest according to one form of the present disclosure, FIG. 3 is a diagram illustrating a shape after an actuation of FIG. 2, and FIG. 4 is a diagram illustrating, in detail, a rear side of a headrest cushion 100 of FIG. 3.

(9) The automatic headrest according to one form of the present disclosure includes: a headrest cushion 100 configured to couple to a stay rod 200 of a vehicle seat back (not illustrated) ; an actuation module 300 configured to couple to the stay rod 200 and including a motor 310 and a screw 330 configured to move forward and backward by the motor 310; a cushion bracket 400 configured to couple to a rear surface of the headrest cushion 100 and including an extension portion 410 configured to extend to a rear side of the headrest cushion and to have a slit hole 411, and a coupling portion configured to protrude to the rear side of the headrest cushion; an actuation link 500 having a plate shape configured to have a predetermined thickness, to couple to the screw 330 of the actuation module 300 at the rear side of the headrest cushion 100, and to have a guide unit 510 with a slit hole 511 configured to extend on the top of the actuation link, and a hinge portion 530 configured to extend on the bottom of the actuation link to move forward and backward when the actuation module 300 is actuated; a motor link 600 of which one side is configured to couple to the actuation module 300 and the other side of the motor link is configured to extend downward; and a guide link 700 having a plate shape, of which one side of a top portion of the guide link is configured to couple to the cushion bracket 400, the other side of the top portion of the guide link is configured to couple to the actuation link 500, and the bottom portion of the guide link is configured to couple to the motor link 600.

(10) The automatic headrest is a device in which an angle of the headrest cushion 100 may be adjusted by force of the motor 310, and the stay rod 200 is configured to couple to the top of the vehicle seat back and the headrest cushion 100 is configured to couple to the front side of the stay rod 200. The actuation module 300 constituted by the motor 310 coupled to the stay rod 200 by a bracket 350 and the screw 330 driven by the motor is coupled between the stay rod 200 and the headrest cushion 100. The screw 330 operates by driving the motor 310, and as a result, the headrest cushion 100 may move forward and backward.

(11) The cushion bracket 400 having a size corresponding to an area of the headrest cushion 100 is coupled to the rear surface of the headrest cushion 100. The extension portion 410 which is extended to the rear side and has the slit hole 411 formed in the vertical direction is formed in the cushion bracket 400. The coupling portion 430 which protrudes to the rear side of the headrest cushion 100 is formed on the bottom of the extension portion 410. A plurality of coupling portions 430 and extension portions 410 of the cushion bracket 400 forms a pair to be spaced apart from each other by a predetermined distance.

(12) The actuation link 500 having the plate shape with the predetermined thickness is coupled between the actuation module 300 and the cushion bracket 400. The actuation link 500 is coupled to the screw 330 of the actuation module at the rear side of the headrest cushion 100. Further, the guide unit 510 with the slit hole 511 is extended to the top of the actuation link 500 and the hinge portion 530 is extended to the bottom of the actuation link 500. When the actuation module 300 is actuated, the actuation link 500 moves forward and backward. Accordingly, an operation is performed based on the center of each of the guide unit 510 and the hinge portion 530. Therefore, since a stroke amount in which the headrest cushion 100 moves forward and backward can be determined through the length of the slit hole 511 of the guide unit 510 of the actuation link 500, other configurations may be available only by changing the length of the slit hole 511 as necessary. Further, the guide unit 510 and the hinge portion 530 form the pair to be formed at both sides, respectively. Accordingly, the hinge portion 530 of the actuation link 500 is formed at a position corresponding to the coupling portion 430 of the cushion bracket 400 and the coupling portion 430 and the hinge portion 530 are pin-coupled to each other to be rotatable primarily by pin-coupling.

(13) The motor link 600 having the plate shape may be configured to form on the top of the motor 310 in the actuation module 300 so as to cover a part of the motor 310. One side of the motor link 600 is configured to couple to the motor 310 of the actuation module 300 and the other side is configured to extend downward.

(14) Further, the guide link 700 having the plate shape may be formed, which is simultaneously coupled to the cushion bracket 400, the actuation link 500, and the motor link 600. The guide link 700 may be configured to have three apexes so that one side of the top is configured to couple to the cushion bracket 400, the other side of the top is configured to couple to the actuation link 500, and the bottom is configured to couple to the motor link 600.

(15) Accordingly, the bottom of the guide link 700 may be configured to pin-couple to the other side of the motor link 600. One side of the top of the guide link 700 is configured to pin-couple to the slit hole 411 of the extension portion 410 of the cushion bracket 400 and the pin may move in the vertical direction in the slit hole 411 of the extension portion 410 with the actuation of the actuation module 300 and the other side of the top of the guide link 700 is configured to pin-couple to the slit hole 511 of the guide unit 510 of the actuation link 500, and as a result, the pin may move in the vertical direction in the slit hole 511.

(16) Further, the motor link 600 serves to adjust a gap generated by the guide link 700 by the actuation of the actuation module 300. When the bottom of the guide link 700 may not be supported, the headrest cushion 100 is pushed to the rear side by the gap at the time of pressing the headrest cushion 100 of the user, and as a result, a stroke is determined to be short. However, the guide link 700 is coupled to the motor link 600 and the guide link 700 is thus supported on the motor link 600 to remove the gap, and as a result, the headrest cushion 100 may more stably support a head of the user.

(17) In one form of the present disclosure, it is illustrated and described that the guide link 700 is formed only at one side of each of the cushion bracket 400 and the actuation link 500, but it is discovered that shapes of the cushion bracket 400, the actuation link 500, the motor link 600, and the guide link 700 may be changed as many as you like according to the design or an environment.

(18) Further, the automatic headrest may further include a cover 800 that covers the automatic headrest by covering the rear surface of the headrest cushion 100 at the rear side of the headrest cushion 100.

(19) When the operation of the automatic headrest is described, when the user operates a switch (not illustrated) which is separately formed, and the like by adjusting the automatic headrest forward, the motor 310 of the actuation module 300 operates, and as a result, the screw 330 moves to the front and as the screw 330 moves, the actuation link 500 rotates around the coupling portion 430 of the cushion bracket 400 to move forward. Thereafter, the guide link 700 rotates primarily by pin-coupling of the fixed motor link 600 and the bottom of the guide link 700 and one side and the other side of the top of the guide link 700 slide downward in the slit hole 411 of the extension portion 410 of the cushion bracket 400 and the slit hole 511 of the guide unit 510 of the actuation link 500, respectively, and as a result, the headrest cushion 100 moves forward. When the headrest cushion 100 moves backward again, the headrest cushion 100 operates contrary to the operation and thus moves backward.

(20) Accordingly, an automatic headrest actuation structure in the related art is mounted on the seat back, and as a result, there is a limit in an operation range, but when an actuation structure is mounted on the headrest itself, the operation range can be more widely secured. In particular, since a stroke amount in which a headrest cushion moves forward and backward can be determined through a length of a slit hole of a guide unit of an actuation link, other configurations are available only by changing the length of the slit hole as necessary.

(21) The description of the disclosure is merely exemplary in nature and, thus, variations that do not depart from the substance of the disclosure are intended to be within the scope of the disclosure. Such variations are not to be regarded as a departure from the spirit and scope of the disclosure.