Patent ID: 12202393

It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the disclosure. The specific design features of the present disclosure as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes, will be determined in part by the particular intended application and use environment.

In the figures, reference numbers refer to the same or equivalent parts of the present disclosure throughout the several figures of the drawing.

DETAILED DESCRIPTION

Hereinafter reference will now be made in detail to various embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings and described below. While the disclosure will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the disclosure to the exemplary embodiments. On the contrary, the disclosure is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the disclosure as defined by the appended claims.

FIG.1is an exploded perspective view showing a headrest sliding device according to the present disclosure,FIGS.2,3,4, and5are perspective views sequentially showing the assembly sequency of the headrest sliding device according to the present disclosure, and reference numeral100in each drawing denotes a rear frame.

The rear frame100is a skeleton disposed inside a headrest and is connected to a stay150configured to adjust the height of the headrest.

To this end, a stay coupling block101having the stay150inserted thereinto and coupled thereto is formed on the rear surface of the rear frame100.

The lower portion of the stay150inserted into and coupled to the stay coupling block101of the rear frame100may be vertically inserted into a seatback (not shown).

Accordingly, the stay150is inserted into the seatback or withdrawn from the inside of the seatback, thereby adjusting the height of the headrest.

Referring toFIG.2, first, a motor120is mounted on the lower side of the front portion of the rear frame100, and a lead screw122, which is an output shaft, is connected to a gearbox121of the motor120and is disposed in an upward direction.

Next, as shown inFIG.3, a slider130coupled to the lead screw122is disposed in front of the rear frame100to be movable upwards and downwards.

The slider130may include a body part131having the lead screw122inserted thereinto and coupled thereto and a pair of elevating guide wings132coupled to the rear frame100to be movable upwards and downwards.

In more detail, a screw hole133having the lead screw122inserted thereinto and coupled thereto is formed at the front portion of the body part131of the slider130, and rotation link connection grooves134connected to a rotation link140are respectively formed on opposite sides of the body part131.

In addition, the elevating guide wings132respectively extend from the upper ends of the body part131in opposite directions and are coupled to the rear frame100to be movable upwards and downwards.

To this end, each of the elevating guide wings132has an elevating guide hole135formed therein, and a vertical guide pin102inserted into the elevating guide hole135is mounted at each of the opposite positions of the front surface of the rear frame100.

Preferably, a fixing block103to which the upper and lower ends of the vertical guide pin102are respectively coupled and fixed is formed to protrude from the front surface of the rear frame100.

Here, in the state in which the lead screw122is inserted into and coupled to the screw hole133of the body part131and the vertical guide pin102is inserted into the elevating guide hole135of the elevating guide wing132, when the lead screw122is rotated in place in one direction or the other direction according to driving of the motor120, the upward-and-downward movement of the slider130may be easily performed.

Then, as shown inFIG.4, the rotation link140is rotatably coupled to the rear frame100.

The rotation link140may include a rotation support143rotatably coupled to the rear frame100by a rotation shaft144, a first rotation bar141formed to extend rearwards from each of the opposite ends of the rotation support143and inserted into and connected to the rotation link connection groove134of the slider130, and a second rotation bar142formed to extend forwards from each of the opposite ends of the rotation support143and connected to a front frame110.

Here, the rear frame100has a rotation shaft connection block104formed to protrude from the front surface thereof and disposed at each of the opposite portions thereof, wherein each of the opposite ends of the rotation shaft144inserted into the rotation support143is rotatably connected to a corresponding one of the rotation shaft connection blocks104.

Preferably, the rotation shaft connection block104of the rear frame100having the rotation shaft144connected thereto is formed to protrude farther forwards than the fixing block103of the rear frame100having the vertical guide pin102coupled and fixed thereto, and as such, the rotation link140may be rotatably disposed around the rotation shaft144at a front position of the rear frame100while avoiding interference with the lead screw122.

In addition, a first rotation pin141-1rotatably formed at the end of the first rotation bar141of the rotation link140is inserted into the rotation link connection groove134formed in the body part131of the slider130.

Here, in the state in which the first rotation pin141-1of the first rotation bar141of the rotation link140is inserted into the rotation link connection groove134formed in the body part131of the slider130, the slider130presses the first rotation bar141in the downward direction when the same is linearly moved in the downward direction. Accordingly, the rotation link140may be rotated forwards around the rotation shaft144.

On the other hand, when the slider130is linearly moved in the upward direction, the same pulls the first rotation bar141in the upward direction. Accordingly, the rotation link140may be rotated rearwards around the rotation shaft144.

Further, as shown inFIG.5, the front frame110is coupled to the front portion of the rear frame100so as to be movable forwards and rearwards.

To this end, one or more horizontal guide pins111having a predetermined length are mounted at four corner positions on the rear surface of the front frame110to guide the forward-and-rearward movement of the front frame110, and the rear frame100has one or more horizontal guide holes105formed therein, wherein the one or more horizontal guide pins111are respectively inserted into the one or more horizontal guide holes105so as to be movable forwards and rearwards.

Accordingly, when the front frame110is moved forwards, the horizontal guide pin111comes out of the horizontal guide hole105of the rear frame100, and when the front frame110is moved rearwards, the horizontal guide pin111is inserted into the horizontal guide hole105of the rear frame100, thereby reliably performing the straight movement of the front frame110.

Meanwhile, the rotation link140is rotatably coupled to the rotation shaft connection block104of the rear frame100by the rotation shaft144, and connects the slider130to the front frame110.

To this end, the front frame110has a rotation guide groove112formed in each of the opposite portions thereof and elongated in the vertical direction, and the second rotation bar142of the rotation link140is inserted into and coupled to the rotation guide groove112so as to be rotatable and movable upwards and downwards.

In this case, a second rotation pin142-1rotatably formed at the end of the second rotation bar142is inserted into and coupled to the rotation guide groove112so as to be rotatable and movable upwards and downwards.

Accordingly, when the slider130is linearly moved in the downward direction as described above, the same presses the first rotation bar141in the downward direction, and the rotation link140is rotated forwards around the rotation shaft144. Further, when the rotation link140is rotated forwards, the second rotation bar142pushes the front frame110forwards and the second rotation pin142-1of the second rotation bar142is positioned at the upper portion of the rotation guide groove112.

On the other hand, when the slider130is linearly moved in the upward direction, the same pulls the first rotation bar141in the upward direction, and the rotation link140is rotated rearwards around the rotation shaft144. Further, when the rotation link140is rotated rearwards, the second rotation bar142pulls the front frame110rearwards and the second rotation pin142-1of the second rotation bar142is positioned at the lower portion of the rotation guide groove112.

Meanwhile, a spring160having tensile performance connects the rear surface of the front frame110to the front surface of the rear frame100.

Accordingly, when the front frame110is moved forwards, the spring160is extended, and when the front frame110is moved rearwards, elastic restoring force of the spring160acts, thereby making it possible to reliably perform the rearward movement of the front frame110.

Hereinafter, a description will be given as to the operation flow of the headrest sliding device of the present disclosure having the above-described configuration.

FIGS.5and7show the state in which the front frame of the headrest sliding device according to the present disclosure is moved rearwards.

When the lead screw122is rotated in place in one direction according to driving of the motor120, the lead screw122is inserted into and coupled to the screw hole133formed in the body part131of the slider130, and the vertical guide pin102is inserted into the elevating guide hole135of the elevating guide wing132. Accordingly, the headrest sliding device may be raised to the maximum rising position of the slider130.

In this case, in the state in which the first rotation pin141-1of the first rotation bar141of the rotation link140is inserted into and coupled to the rotation link connection groove134formed in the body part131of the slider130, the slider130pulls the first rotation bar141upwards when the same is linearly moved upwards. Accordingly, the rotation link140may be rotated rearwards around the rotation shaft144.

In addition, in the state in which the second rotation pin142-1of the second rotation bar142of the rotation link140is inserted into and coupled to the rotation guide groove112of the front frame110, when the rotation link140is rotated rearwards, the second rotation bar142may pull the front frame110rearwards, and simultaneously, the second rotation pin142-1may be positioned at the lower portion of the rotation guide groove112.

Here, when the second rotation bar142pulls the front frame110rearwards, the horizontal guide pin111of the front frame110is inserted into the horizontal guide hole105of the rear frame100. Accordingly, the rearward movement of the front frame110may be easily performed, and the front frame110may be linearly moved in the rearward direction.

In this manner, the front frame110may be moved rearwards up to a position desired by an occupant, and as such, the position of the headrest configured to support the rear portion of the head of the occupant may be easily adjusted rearwards up to the position desired by the occupant.

FIGS.6and8show the state in which the front frame of the headrest sliding device according to the present disclosure is moved forwards.

When the lead screw122is rotated in place in the other direction according to driving of the motor120, the lead screw122is inserted into and coupled to the screw hole133formed in the body part131of the slider130, and the vertical guide pin102is inserted into the elevating guide hole135of the elevating guide wing132. Accordingly, the headrest sliding device may be lowered to the maximum descending position of the slider130.

In this case, in the state in which the first rotation pin141-1of the first rotation bar141of the rotation link140is inserted into and coupled to the rotation link connection groove134formed in the body part131of the slider130, the slider130presses the first rotation bar141downwards when the same is linearly moved downwards. Accordingly, the rotation link140may be rotated forwards around the rotation shaft144.

In addition, in the state in which the second rotation pin142-1of the second rotation bar142of the rotation link140is inserted into and coupled to the rotation guide groove112of the front frame110, when the rotation link140is rotated forwards, the second rotation bar142may pull the front frame110forwards, and simultaneously, the second rotation pin142-1may be positioned at the upper portion of the rotation guide groove112.

Here, when the second rotation bar142pulls the front frame110forwards, the horizontal guide pin111of the front frame110exits the horizontal guide hole105of the rear frame100. Accordingly, the forward movement of the front frame110may be easily performed, and the front frame110may be linearly moved in the forward direction.

In this manner, the front frame110may be moved forwards up to a position desired by an occupant, and as such, the position of the headrest configured to support the rear portion of the head of the occupant may be easily adjusted forwards up to the position desired by the occupant.

Meanwhile, as shown inFIGS.7and8, a front headrest cover20having a headrest foam (not shown) provided therein may be attached to the front frame110, a rear headrest cover10having a headrest foam (not shown) provided therein may be attached to the rear frame100, and the rear end of the front headrest cover20may be disposed to slidably overlap the front end of the rear headrest cover10.

Accordingly, when the front frame110is moved forwards and rearwards, the front headrest cover20is also moved forwards and rearwards, and as such, the rear portion of the head of an occupant may be substantially closely supported by the front headrest cover20.

As described above, when the slider130is linearly moved upwards and downwards by driving of the motor120and simultaneously rotates the rotation link140forwards or rearwards, the rotation link140is caused to push or pull the front frame110, thereby making it possible to accurately perform adjustment of the front and rear positions of the headrest without any gap or error.

As is apparent from the above description, a headrest sliding device of the present disclosure provides the following effects.

First, when a slider is linearly moved upwards and downwards by driving of a motor and simultaneously rotates a rotation link forwards or rearwards, the rotation link pushes or pulls a front frame, thereby accurately performing adjustment of the front and rear positions of a headrest without any gap or error.

Second, since the front and rear positions of the headrest are adjusted depending on the position of the occupant's head, the rear portion of the head of the occupant is completely supported by the headrest, thereby providing the occupant with comfort and improving occupant convenience.

Third, since the rear portion of the head of the occupant is closely supported by the headrest, it is possible to reduce the risk of neck injury to the occupant in the event of vehicle collision.

The disclosure has been described in detail with reference to preferred embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the appended claims and equivalents thereto.