KR-20260067726-A - automatic folding device for head rest

KR20260067726AKR 20260067726 AKR20260067726 AKR 20260067726AKR-20260067726-A

Abstract

The posted content relates to an automatic folding device for a headrest designed to tilt the headrest of an unoccupied seat to maximize the occupant's field of vision. An automatic folding device for a headrest according to one embodiment of the present specification is It is applied to the automatic folding device of the headrest installed at the top of the seat backrest, and A housing having a coupling hole formed through the first and second protrusions that are extended oppositely at the top; First and second brackets, which are rotatably fixed to the first and second protrusions by a hinge pin and have a seating groove formed therein with an opening on the entrance side; A stay rod comprising a pivot portion rotatably seated in the above-mentioned seating groove and a fixing portion extended at an arbitrary angle from the pivot portion and fixed to a headrest; A headrest cable having a lower end connected to a drive unit and an upper end connected to one side of the housing to maintain a relaxed state, and which converts the stay rod to a folded state by tension when converted to a tense state by the drive unit; A return spring fitted into the pivot portion of the stay rod, with one end fixed to one side of the housing and the other end fixed to the locking plate of the housing; provided, The present invention provides an automatic folding device for a headrest characterized by enabling the stay rod to be converted to a folding state by the elastic restoring force of the return spring by converting the return spring to an unlocked state by the tension formed when the headrest cable is converted to a tensioned state.

Inventors

김동수
유병훈
김정수

Assignees

광명산업(주)

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (5)

It is applied to the automatic folding device of the headrest installed at the top of the seat backrest, and A housing having a coupling hole formed through the first and second protrusions that are extended oppositely at the top; First and second brackets, which are rotatably fixed to the first and second protrusions by a hinge pin and have a seating groove formed therein with an opening on the entrance side; A stay rod comprising a pivot portion rotatably seated in the above-mentioned seating groove and a fixing portion extended at an arbitrary angle from the pivot portion and fixed to a headrest; A headrest cable having a lower end connected to a drive unit and an upper end connected to one side of the housing to maintain a relaxed state, and which converts the stay rod to a folded state by tension when converted to a tense state by the drive unit; A return spring fitted into the pivot portion of the stay rod, with one end fixed to one side of the housing and the other end fixed to the locking plate of the housing; provided, An automatic folding device for a headrest characterized by enabling the stay rod to be converted to a folding state by the elastic restoring force of the return spring by converting the return spring to an unlocked state by the tension formed when the headrest cable is converted to a tensioned state.
In paragraph 1, The above-mentioned locking plate is A locking groove in which the latch of the above-mentioned return spring is disengaged; An automatic folding device for a headrest characterized by having a slot formed in the vertical direction in the locking plate to communicate with the above-mentioned locking groove.
In paragraph 1, An automatic folding device for a headrest, characterized by further comprising: a mounting groove formed such that the entrance side is open on the opposing side wall member of the housing, and the rotating part is seated thereon when the stay rod is switched from a folding mode to a usage mode.
In paragraph 1, An automatic folding device for a headrest, characterized by further comprising a damper mounted on the inner surface of an intermediate member of the housing and configured to mitigate the impact generated when the stay rod is switched from a folding mode to a usage mode upon contact with the return spring.
In paragraph 3, An automatic folding device for a headrest, characterized by further comprising a stopper for preventing sagging of the housing fixed to the backrest, which is formed by bending it backward on the upper surface of a wing portion formed symmetrically on both sides of the side wall member.

Description

Automatic folding device for headrest The present specification relates to a headrest for a vehicle, and more specifically, to an automatic folding device for a headrest that tilts the headrest of a seat without a passenger to maximize the passenger's field of vision. Unless otherwise indicated in this specification, the contents described in this section are not prior art for the claims of this application, and are not to be recognized as prior art simply because they are included in this section. Generally, a headrest for an automobile is installed at the top of the seat backrest and is designed to comfortably support the head by adjusting the height and front-to-back position of the support member according to the passenger's convenience during normal use, and especially in the event of a collision or rear-end accident, to prevent the passenger's head from being thrown backward abruptly, thereby preventing serious neck injuries. While these headrests could be adjusted in height and forward/backward position, they could not be fully reclined. Consequently, when not in use, especially when driving with almost no passengers in the rear seats, the support member remained upright, which obstructed the rear view of the driver in the front seat or the passenger in the adjacent seat, and also interfered with safe driving. Taking these problems into account, a headrest device (U.S. Patent No. 6,302,485) was invented to maximize the passenger's field of view by lowering the headrest of an empty seat, as illustrated in FIG. 1. The conventional headrest device (4) includes a head support member (1) that is supported by an inner frame (3) of a seat backrest (2) by a stay rod (5), and the support member (1) is installed to be rotatable with respect to a horizontal portion (6) of the stay rod (5) as an axis so as to be in an upright state when in use and maintained in a lying state (virtual line position) when not in use. Although not shown in the drawings, the aforementioned headrest device had problems in that the structure of each of the main components—the stopper member, the rotating member, and the release rod—as well as the structure for assembling to the stay rod, were complex, making the manufacturing of each component and the overall assembly work very cumbersome and difficult. In addition, due to these problems, productivity was significantly reduced and product defects occurred frequently. Furthermore, because each component was formed in a large size, material waste was caused, leading to a significant increase in production costs. Moreover, the headrest device had problems such as becoming large and heavy overall. A headrest operating device is registered in Korean Patent Publication No. 10-1910941 (published on October 23, 2018). FIG. 1 is a schematic diagram of a vehicle headrest device according to the prior art, FIG. 2 is an exploded perspective view of an automatic folding device for a headrest according to a preferred embodiment of the present specification, FIG. 3(a,b) is a diagram showing the usage state of the folding device illustrated in FIG. 2 (front and rear perspective views showing the locking state of the stay rod), FIG. 4 is a diagram showing the usage state of the automatic folding device of the headrest illustrated in FIG. 2 (showing the unlocked state (folded state) of the stay rod), FIG. 5(a,b,c) shows an automatic folding device for a headrest illustrated in FIG. 2, FIG. 5a is a drawing showing the locking state of the stay rod, and FIG. 5b is a drawing showing the release of the latch locking of the return spring by the tension of the headrest cable, thereby switching the stay rod from a locked state to an unlocked state. FIG. 5c is a drawing showing the unlocked state of the stay rod. Hereinafter, an automatic folding device for a headrest according to a preferred embodiment of the present specification will be described in detail with reference to the attached drawings. Referring to FIGS. 2 to 4, an automatic folding device for a headrest according to one embodiment of the present specification is It is applied to an automatic folding device for a vehicle headrest installed at the top of the seat backrest, and A housing (13) having a coupling hole (12) formed through the first and second protrusions (10, 11) that are extended oppositely at the top; First and second brackets (17, 18) are rotatably fixed to the first and second protrusions (10, 11) by hinge pins (14, 15) and have a seating groove (16) formed therein with an open entrance side; A conventional stay rod (21) comprising a pivoting part (19) that is pivotally seated in a seating groove (16), and a fixing part (20) that is formed to extend at an arbitrary angle from the pivoting part (19) and fixed to a conventional headrest (not shown); A headrest cable (22) having a lower end connected to a drive unit (not shown) and an upper end connected to one side of a housing (13) to maintain a relaxed state, and which converts the