WO2017086539A1

WO2017086539A1 - Seat track for vehicle

Info

Publication number: WO2017086539A1
Application number: PCT/KR2016/000563
Authority: WO
Inventors: 백홍전; 박건영; 오범석
Original assignee: 주식회사 서연씨엔에프
Priority date: 2015-11-16
Filing date: 2016-01-20
Publication date: 2017-05-26

Abstract

The present invention relates to a seat track for a vehicle which is capable of adjusting a slide of a seat back and forth with respect to a vehicle body, wherein an upward end of an upper rail is extended in a diagonal direction into an internal space which is bounded by an outer sidewall, a horizontal bent part, and a downward arm part of a lower rail, and is formed as a first inclined surface part extended in an outer diagonal direction from a lower end of an inner sidewall, a second inclined surface part extended in an inner diagonal direction from an end of the first inclined surface part, and a third inclined surface part extended in an outer diagonal direction from the second inclined surface part, wherein a main roller is disposed outside the upper end of the upward rail, comes into contact with and is supported by a bottom surface part and the outer sidewall of the lower rail in a diagonal direction in a lower portion thereof, and comes into contact with and supports the first inclined surface part in an inward diagonal direction in an upper portion thereof, and wherein an auxiliary roller is disposed inside the upward end of the upper rail, comes into contact with and is supported by the third inclined surface part in an inward diagonal direction in a lower portion thereof, and comes into contact with and supports an upper horizontal part and the downward arm part of the lower rail in an inward diagonal direction in an upper portion thereof. As such, the upper rail can be more stably supported by the lower rail through the main roller and the auxiliary roller.

Description

Car seat track

The present invention relates to a seat track for a vehicle that enables the front and rear slide adjustment of the seat with respect to the vehicle body.

1 is a cross-sectional view of a conventional vehicle seat track 100. As shown in the drawing, the conventional vehicle seat track 100 is constrained by the main roller 131 and the auxiliary roller 132 by being constrained by the left and right upper end portions 123 of the upper rail 120 with respect to the lower rail 110. It is provided so that the slide back and forth in the state.

A seat (not shown) is mounted and fixed on the upper horizontal portion 121 of the upper rail 120. Accordingly, when a seated person is seated, the load W is transmitted through the upper horizontal portion 121. The upper rail 120 is supported by the main roller 131 in a state where it is somewhat collapsed.

In this case, since the main roller 131 exerts the bearing force F in the inward oblique direction with respect to the upstream end 123, the upstream end 123 rotates inwardly (R).

When the upper end 123 is rotated inward, the contact support relationship with respect to the upper end 123 of the auxiliary roller 132 interposed between the outer rail 112 and the horizontal bend 113 on the lower rail 110 side. Was not made stable, which caused problems such as lowering of bearing capacity, noise and friction, and deformation of rails.

Accordingly, it is an object of the present invention to provide a vehicle seat track that allows the upper rail to be more stably supported on the lower rail through the main roller and the auxiliary roller.

In order to achieve the above object, the present invention, the bottom surface portion, the outer wall portion vertically raised from the left and right both ends of the bottom surface portion, the horizontal bending portion extending inwards from the upper end of the outer wall portion and vertically from the inner end of the horizontal bending portion A lower rail having a lower arm portion which is lowered; The upper horizontal portion spaced apart from the upper and lower ends of the upper and lower horizontal portions and vertically lowered from the left and right ends of the upper horizontal portion, the inner wall portion facing the inner side of the downward arm portion and the lower wall portion rising from the lower end of the inner wall portion; An upper rail having an upper end portion extending into a space between the downward arm portions; In the vehicle seat track including a roller for slidably supporting the upper rail with respect to the lower rail through the upper end, the upper end of the upper rail portion, the outer wall portion, horizontal bending portion and the lower arm portion of the lower rail A first inclined surface portion extending in an oblique direction to an inner space bounded by the first inclined surface portion and extending in an outward oblique direction from a lower end of the inner wall portion, and a second inclined surface portion extending in an inward diagonal direction from an end of the first inclined surface portion; And a third inclined surface portion extending from the end portion of the second inclined surface portion to the outer oblique direction again, wherein the roller is disposed outside the upper end portion of the upper rail, and the lower portion is formed by the bottom surface portion and the outer wall portion of the lower rail. Contact support in an oblique direction and contact support in an inward diagonal direction with respect to the first inclined surface portion Main roller; It is disposed inwardly of the upper end of the upper rail, the lower portion is in contact with the third inclined surface portion in the inward oblique direction and the upper portion of the upper rail and the lower arm portion in contact with the inner diagonal direction in support of the It provides a vehicle seat track comprising a secondary roller.

Here, the third inclined surface portion of the upper end may be formed in a planar manner to make point contact with the auxiliary roller.

At this time, the first inclined surface portion of the upper end may be formed of a curved surface having a radius of curvature larger than that of the main roller to accommodate and support the main roller.

In this case, the main roller may be to be in point contact with the bottom surface portion and the outer wall portion of the lower rail, respectively.

On the other hand, the vehicle seat track is a locking device having a locking arm that is accommodated and installed between the left and right inner wall portions of the upper rail and operated to move up and down to achieve locking and unlocking of the upper rail to the lower rail. The upper end portion of the upper rail further includes a bending switching portion formed between the second inclined surface portion and the third inclined surface portion to be disposed close to the lower arm portion of the lower rail, so that the locking arm when the locking device is locked. The lower rail side may be fastened to the lower arm portion, and at the same time, the upper rail side inner wall portion and the bent switch may be coupled together.

According to the vehicle seat track according to the present invention as described above, the upper end of the upper rail is supported in the inward oblique direction by the outer main roller in the lower portion, and is supported in the outer oblique direction by the inner auxiliary roller in the upper portion Through the main roller and the auxiliary roller can be more stably supported on the lower rail. That is, the state where the upper rail side upper end portion which is rotationally deformed inwardly by the main roller is in contact with and supported by the auxiliary roller inside thereof can be constantly maintained.

1 is a cross-sectional view of a vehicle seat track according to the prior art,

2 is a perspective view of a vehicle seat track according to an embodiment of the present invention;

3 is an exploded perspective view of the vehicle seat track of FIG. 2;

4 is a cross-sectional view of the vehicle seat track of FIG. 2;

5 is a cross-sectional view showing a modified state of the vehicle seat track of FIG. 4;

6 is a cross-sectional view illustrating a locking state of the locking device in the vehicle seat track of FIG. 4.

As shown in FIGS. 2 and 3, the vehicle seat track 200 according to an exemplary embodiment of the present invention includes the lower rail 210, the upper rail 220, and the upper rail 220 with respect to the lower rail 210. It includes a main roller 231 and the auxiliary roller 232 to support the slide. In addition, the vehicle seat track 200 includes a locking device 240 installed inside the upper rail 220, and includes a retainer 250 for restraining the main roller 231 and the auxiliary roller 232. .

4 is a cross-sectional view of the vehicle seat track 200 of FIG. 2, wherein the lower rail 210 includes a bottom surface portion 211, an outer wall portion 212 that rises vertically from both left and right ends of the bottom surface portion 211, and an outer wall thereof. A horizontal bend 213 extending inwardly from the upper end of the portion 212 and a downward arm portion 214 vertically lowered from the inner end of the horizontal bend 213 are formed.

The upper rail 220 is vertically lowered from the left and right ends of the upper horizontal portion 221 and the upper horizontal portion 221 spaced apart from the upper portion of the bottom surface portion 211 of the lower rail 210 and the lower rail An inner wall portion 222 facing the lower arm portion 214 of 210 from the inner side and a space between the outer wall portion 212 and the lower arm portion 214 rising from the lower end of the inner wall portion 222. An upward end portion 223 extending to S is formed.

At this time, the upper end portion 223, as shown in the diagonal direction to the inner space (S) bounded by the outer wall portion 212, the horizontal bending portion 213 and the lower arm portion 214 of the lower rail 210 The first inclined surface portion 223a which extends from the lower end of the inner wall portion 222 in the outward oblique direction and the second inclined surface extending in the inward oblique direction from the end of the first inclined surface portion 223a. It is formed of the third inclined surface portion 223c extending from the end of the portion 223b and the second inclined surface portion 223b in the outward oblique direction.

In this configuration, the lower main roller 231 accommodated in the internal space S is disposed outside the upper end 223, and the upper auxiliary roller 232 is disposed inside the upper end 223. Each contact is supported.

Specifically, the main roller 231 is in contact with the bottom surface 211 and the outer wall portion 212 of the lower rail 210 to the lower side is supported in the inner diagonal direction, the upper end of the upper end portion 223 1 It contacts and supports in the inclined diagonal direction with respect to the inclined surface part 223a.

At this time, the radius of curvature of the corner portion 211-1 where the bottom surface portion 211 and the outer wall portion 212 are connected to each other is formed to be smaller than the radius of curvature of the main roller 231 so that the main roller 231 has a bottom surface portion ( The frictional resistance during rolling motion can be reduced by making point contact between the 211 and the outer wall 212.

In addition, the first inclined surface portion 223a of the upper end portion 223 supported by the main roller 231 in the inward oblique direction is, as shown, a curved surface having a larger radius of curvature than the main roller 231. By accommodating the main roller 231 it is preferable to contribute to reducing the frictional resistance by minimizing the contact portion within the range to prevent the separation of the main roller 231.

On the other hand, the auxiliary roller 232 of the upper side is supported in contact with the inner diagonal direction by the third inclined surface portion 223c of the upper end portion 223 in the lower portion and the upper horizontal portion 213 of the lower rail 210 in the upper portion. And the lower arm portion 214 are respectively contacted and supported in the inner diagonal direction.

In this case, in order to reduce rolling friction by the auxiliary roller 232, the third inclined surface part 223c contacting and supporting the second roller 232 is formed in a planar manner as shown in order to make point contact with the auxiliary roller 232. Do.

According to the shape of the upper end 223 and the arrangement of the main roller 231 and the auxiliary roller 232 as described above, as shown in Figure 5, when the load (W) is applied to the upper rail 220, the upper end When the 223 receives the supporting force F by the lower main roller 231 and tries to rotate the inner side, the deformation is blocked by the inner auxiliary roller 232 as well as contacted by the auxiliary roller 232. As the supported relationship is continuously maintained, a stable support structure between the

rails

210 and 220 and the

rollers

231 and 232 may be constantly maintained.

In addition, referring to FIG. 4, the length of the third inclined surface portion 223c supporting the auxiliary rollers 232 may be set to be shorter from the inside, so that the outer rail portion 210 on the lower side of the lower rail 210 and the horizontal curved portion ( 213 may greatly reduce the possibility of interference. On the other hand, in the conventional vehicle seat track (100 in FIG. 1), the end of the upper end portion 123 is disposed close to the horizontal bend portion 113 on the lower rail 110 side. When the upper end 123 rotates inwardly (R) as the rail 120 receives the load (W), until the interference with the lower arm part 114 of the lower rail 110 on the inner side may occur. there was.

FIG. 6 is a view illustrating a locking state of the vehicle seat track 200, and the locking device 240 installed inside the upper rail 220 has an upper locking position according to the vertical operation of the protrusion pin 241. 6) and the lowered unlocking position (not shown).

In the locking position of FIG. 6, the locking arm 242 extending left and right at the lower end of the locking device 240 penetrates the lower arm portion 214 of the lower rail 210 and also has an upper end 220 side upward end portion ( 223 is fastened through.

That is, the lower rail portion 214 on the lower rail 210 side fastened by the locking arm 242 so that the upper rail 220 does not slide, the inner wall portion 222 and the upper end portion of the upper rail 220 side. 223 is disposed between them and fastened to achieve more stable locking. In other words, three-point support for the locking arm 242 is achieved by the inner wall portion 222, the lower arm portion 214, and the upper end portion 223 relative to the slide direction.

As described above, the locking state may include the second inclined surface portion 223b extending in the upper diagonal direction and the third inclined surface portion 223c extending in the outer diagonal direction as described above. It is possible because the bending switching portion 223d forming the inner end is disposed between the lower arm portion 214 on the lower rail 210 side.

In contrast, in the conventional vehicle seat track 100 of FIG. 1, the upper end portion 123 of the upper rail 120 is curved in a direction away from the lower arm portion 114 of the lower rail 110, and thus is locked. The locking arm (see 242 in FIG. 6) can lock only the inner wall portion 122 of the upper rail 120 side and the lower arm portion 114 of the lower rail 110 side, resulting in only two-point support. It is only.

In this case, when the front and rear slide impacts on the seat track 100 occur, the rocking arm (242 of FIG. 6) supported by the lower arm portion 114 due to the slide impact of the upper rail 120 is caused to bend downward. There is a concern that a problem that may be released from the arm portion 114, that is, a free slide problem due to the unlocking of the upper rail 120 occurs.

Meanwhile, in FIG. 6, when the locking arm 242 descends due to the downward manipulation of the protruding pin 241 and is out of the lower end of the lower arm portion 214 on the lower rail 210, the upper rail 220 for the lower rail 210 is shown. ) Is unlocked, that is, unlocked.

Since the vehicle seat track 200 described above is only one embodiment to help understanding of the present invention, it is difficult to understand the scope of the present invention to the technical scope of the present invention.

The scope of the invention to the technical scope is defined by the claims and equivalents described below.

Claims

A lower rail formed with a bottom surface portion, an outer wall portion vertically raised from left and right ends of the bottom surface portion, a horizontal curved portion extending inwardly from an upper end of the outer wall portion, and a downward arm portion vertically lowered from an inner end of the horizontal curved portion; ; The upper horizontal portion spaced apart from the upper and lower ends of the upper and lower horizontal portions and vertically lowered from the left and right ends of the upper horizontal portion, the inner wall portion facing the inner side of the downward arm portion and the lower wall portion rising from the lower end of the inner wall portion; An upper rail having an upper end portion extending into a space between the downward arm portions; In the vehicle seat track comprising a roller for slidably supporting the upper rail with respect to the lower rail through the upper end,

The upper end of the upper rail extends in an oblique direction to an inner space bounded by an outer wall portion, a horizontal curved portion and a lower arm portion of the lower rail, and a first inclined surface portion extending in an outer diagonal direction from a lower end of the inner wall portion. And a second inclined surface portion extending in an inward oblique direction from an end of the first inclined surface portion and a third inclined surface portion extending in an outward oblique direction from an end of the second inclined surface portion,

The roller,

The main rail is disposed outwardly of the upper end of the upper rail, and is supported in a diagonal direction by the bottom surface portion and an outer wall portion of the lower rail in the lower portion thereof, and is supported in the inner diagonal direction with respect to the first inclined surface portion in the upper portion thereof. With a roller;

It is disposed inwardly of the upper end of the upper rail, the lower portion is in contact with the third inclined surface portion in the inward oblique direction and the upper portion of the upper rail and the lower arm portion in contact with the inner diagonal direction in support of the Vehicle seat track comprising a secondary roller.
The method of claim 1,

The third inclined surface portion of the upper end is formed in a planar vehicle track, characterized in that the auxiliary roller and the point contact is made.
The method according to claim 1 or 2,

The first inclined surface portion of the upstream end is formed of a curved surface having a radius of curvature larger than that of the main roller vehicle seat track, characterized in that the main roller is received and supported.
The method of claim 3,

The main roller is a seat track for a vehicle, characterized in that the point contact is supported by the bottom surface portion and the outer wall portion of the lower rail, respectively.
The method of claim 1,

And a locking device having a locking arm that is accommodated and installed between left and right inner wall portions of the upper rail and operated to move up and down to achieve locking and unlocking of the upper rail to the lower rail.

The upper end portion of the upper rail is disposed so that the bend switching portion between the second inclined surface portion and the third inclined surface portion is close to the downward arm portion of the lower rail,

The locking arm is coupled to the lower rail side of the lower rail side when locked by the locking device, and at the same time the upper rail side inner wall portion and the bending switching unit is coupled to the vehicle seat track.