JP2013091344A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a space for disposing a component in a vehicle height direction in a vehicle seat that includes a rail device for sliding the seat and a lifter device that regulates the height in the seating part of the seat.SOLUTION: The vehicle seat includes: a rail device 20 (40) that has a lower rail 21 (41) fixed to the vehicle floor side; and an upper rail 22 (42) to which the seating part of the seat that is slidable along this lower rail 21 (41) is connected, wherein the contact part to the slide object member in this upper rail 22 (42) has a hat shape of cross section in nearly reverse U character type; and a lifter device 30 that has a link member that turns by the end 311 of the floor side as a fulcrum when the seating part 11 of the seat moves vertically, wherein the end at floor side of the link member 31 is directly and turnably connected to the side part of a connection part 221 (421) of the upper rail 22 (42).

Description

  The present invention relates to a vehicle seat including a rail device that slides a seat and a lifter device that adjusts the height of a seating portion of the seat.

  Patent Document 1 below describes a vehicle seat provided with such a rail device and a lifter device. The rail device includes a lower rail that is fixed to the floor side of the vehicle and an upper rail that is slidably attached to the lower rail. The upper rail is connected to a link member that rotates around the floor end when the seat seat is moved up and down.

  In this type of vehicle seat rail device, a connecting portion 921 of a sliding target member on an upper rail 92 that slides on a lower rail 91 as shown in FIG. A “hat-type” rail device 90 is often used. In a vehicle seat in which such a “hat” rail is used, the upper rail 92 and the link member 93 are connected via a member called a bracket 94 or the like. For example, a bracket 94 having a substantially L-shaped cross section is connected to the upper surface of the upper rail 92, and the floor side end of the link member 93 is rotatably connected to the side surface of the bracket 94.

JP 2011-173696 A

  However, when the bracket as described above is used, there is a problem that a space in the height direction for arranging the parts becomes large.

  In view of the above circumstances, the present invention provides a vehicle seat provided with a rail device that slides a seat and a lifter device that adjusts the height of a seating portion of the seat, and has a space for arranging components in the vehicle height direction. The purpose is to make it smaller.

  In order to solve the above problems, a vehicle seat according to the present invention has a lower rail fixed to a vehicle floor, and an upper rail to which a seating portion of a seat that is slidable along the lower rail is connected. The upper rail is connected to the sliding target member in the form of a hat with a substantially inverted U-shaped cross section, and a link member that rotates around the floor end when the seat seat moves up and down. And a floor-side end portion of the link member is directly connected to the side surface of the connecting portion of the upper rail so as to freely rotate.

  Thus, if the link member is directly connected to the side surface of the connection portion of the upper rail having a hat shape with a substantially inverted U-shaped cross section, the connection member that connects the upper rail and the link member (such as the bracket described above). Therefore, it is possible to reduce the space for arranging the parts in the vehicle height direction. In addition, the manufacturing cost can be reduced by not using such a connecting member.

  In the rail device, the upper rail is slidably engaged with the lower rail at both lower sides in the width direction, and a connection portion of the upper rail is covered by the lower rail protruding upward from the lower rail. It is sufficient if there is no part.

  In this way, if the connecting portion of the upper rail has a shape protruding above the lower rail, the link member can be directly pivotally connected to the side surface of the upper rail without complicating the configuration of the rail device. .

  In the rail device, the upper rail may be slidably engaged with the lower rail on the side other than the side surface to which the link member of the upper rail is directly connected.

  According to the above configuration, since the link member can be directly connected to the upper rail of the rail device, the entire rail device can be lowered, so that the space for arranging components in the vehicle height direction is further reduced.

  According to the vehicle seat according to the present invention, the space for arranging the components in the vehicle height direction can be reduced by not using the connecting member that connects the upper rail and the link member.

1 is an external perspective view of a vehicle seat (a rail device included in the vehicle seat) according to a first embodiment of the present invention. It is the figure which looked at the vehicle seat (rail device with which this vehicle seat is provided) concerning a first embodiment of the present invention from the front-rear direction. It is the figure which looked at the vehicle seat (rail device with which this vehicle seat is provided) concerning a second embodiment of the present invention from the front-rear direction. It is the figure which showed the structure of the conventional rail apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the vertical direction (height direction) refers to the height direction (the Z-axis direction shown) of the vehicle seats 1a, 1b, and the front-rear direction refers to the front-rear direction (illustrated) of the vehicle seats 1a, 1b. Y-axis direction), and the width direction means the width direction (X-axis direction shown) of the vehicle seats 1a and 1b.

  The vehicle seat 1a according to the first embodiment will be described. The vehicle seat 1a according to the present embodiment includes a seat body, a rail device 20, and a lifter device 30. As the seat body, a well-known general one having a seating portion 10 (seat cushion) and a backrest portion (seat back) on which an occupant sits can be applied, and detailed description thereof is omitted.

  The rail device 20 is a device that slides the entire seat in the front-rear direction, and includes a lower rail 21 and an upper rail 22. The lower rail 21 is a fixed rail that is fixed to the floor surface of the vehicle. The upper rail 22 is a movable rail that is slidable along the lower rail 21. Since the lower rail 21 is provided along the front-rear direction, the upper rail 22 slides in the front-rear direction.

  The upper rail 22 includes a connecting portion 221 to which a sliding target (the entire seat in the present embodiment) is connected, and an engaging portion 222 that is slidably engaged with the lower rail 21. The rail device 20 of the present embodiment is a so-called “hat-type” rail in which the connecting portion 221 of the upper rail 22 has a substantially U-shaped hat shape as shown in FIG. The engaging portion 222 of the upper rail 22 is engaged with the lower rail 21 so as to be sandwiched from the width direction. That is, the upper rail 22 is slidably engaged with the lower rail 21 below both sides in the width direction. In addition, in order to make sliding of the upper rail 22 easy between the upper rail 22 and the lower rail 21, it is good to interpose the ball as shown in figure. The connection portion 221 of the upper rail 22 is a portion that is not covered by the lower rail 21 that protrudes upward from the lower rail 21. Therefore, the connecting portion 221 of the upper rail 22 is exposed on both side surfaces and the upper surface in the width direction.

  The lifter device 30 is a device having a link member 31 that can set the seating portion 10 to an arbitrary height within a predetermined range. As a mechanism for changing the height of the seating portion 10, a known general mechanism can be applied. For example, the one that moves the seat portion 10 up and down by rotating the sector gear by human power (lever operation) or a drive source (motor or the like) can be applied (see Patent Document 1 above). A total of four link members 31 are provided in front and rear of the vehicle. The end 311 on the floor side of the link member 31 is connected to the upper rail 22 as will be described later, and the end 312 on the other side is connected to the seating portion 10 (specifically, a seat frame (not shown) constituting the seating portion 10). It is connected. When the seating portion 10 moves up and down, the link member 31 rotates with the end portion 311 on the floor side as a fulcrum, and the end portion 312 on the seating portion 10 side moves up and down.

  Each link member 31 that rotates with the end 311 on the floor side as a fulcrum is a side surface on one side of the upper rail 22 (a side surface on the outer side in the width direction of the seat. The link member 31 disposed on the left side of the seat is the left side surface, the seat The link member 31 disposed on the right side is connected to the right side surface so as to be freely rotatable, and does not use a connection member called a bracket or the like as in the prior art. Specifically, the support shaft S <b> 1 attached so that the flange portion protrudes from both side surfaces of the upper rail 22 is loosely inserted into a through hole formed in the end portion 311 on the floor side of the link member 31. The link member 31 is attached to the lower rail 21 at a predetermined interval so that the link member 31 does not come into contact with the lower rail 21 within a range in which the seat portion 10 rotates as the lifter device 30 moves up and down. .

  Thus, according to the vehicle seat 1a according to the present embodiment, the link member 31 is directly connected to the exposed side surface of the upper rail 22 without being covered by the lower rail 21, and thus the link member 31 as in the related art. Compared to a configuration using a connection member interposed between the upper rail 22 and the upper rail 22, a space for arranging components in the vehicle height direction can be reduced. Moreover, it leads to the reduction of a number of parts and the cost reduction accompanying this.

  Next, the vehicle seat 1b according to the second embodiment of the present invention will be described. The vehicular seat 1b according to the second embodiment differs from the vehicular seat 1a according to the first embodiment described above, and therefore the configuration of the rail device 40 will be described.

  As in the first embodiment, the rail device 40 includes a lower rail 41 that is fixed to the floor surface of the vehicle, and an upper rail 42 that is slidable along the lower rail 41. As shown in the figure, the rail device 40 as a whole has a substantially square cross section. The side surface of one side of the rail device 40 having a substantially rectangular shape is designed to be constituted only by the upper rail 42, and the end 311 on the floor side of the link member 31 is “directly” on this one side surface. It is pivotally connected.

  A more specific configuration is as follows. The lower rail 41 is a member having a substantially L-shaped cross section when viewed roughly as a whole. One end of the lower rail 41 located on the upper side of the rail device 40 is bent in a substantially L-shaped cross section (hereinafter, this portion is referred to as a first engaged portion 411). The other end of the lower rail 41 located on the lower side of the rail device 40 is bent in a substantially U-shaped cross section (hereinafter, this portion is referred to as a second engaged portion 412).

  On the other hand, the upper rail 42 has a connecting portion 421 and an engaging portion which are hat-shaped with a substantially inverted U-shaped cross section. The connecting portion 421 is formed such that a portion constituting one side surface of the race device is relatively longer than the other side. The engaging portion on one side of the upper rail 42 located on the upper side of the rail device 40 is bent in a substantially U-shaped cross section when viewed as a whole, and the right side of the bent portion is formed in a reverse “<” shape. (Hereinafter, the engaging portion is referred to as a first engaging portion 422a). The first engagement portion 422a of the upper rail 42 is engaged with the first engagement portion 411 of the lower rail 41 so as to be sandwiched between the first engagement portions 422a. Further, the other end of the engaging portion of the upper rail 42 located on the lower side of the rail device 40 is bent in an approximately L shape (hereinafter, this portion is referred to as a second engaging portion 422b). . The second engagement portion 422b of the upper rail 42 is engaged with the second engagement portion 412 of the lower rail 41 so as to sandwich the second engagement portion 422b.

  As described above, when viewed from the rail device 40 as a whole, the upper rail 42 is slidably engaged with the lower rail 41 on the upper side (upper surface) and the lower side (lower surface) of the rail device 40. Then, the entire one side surface (long side surface) of the connecting portion 421 of the upper rail 42 constitutes one side surface of the rail device 40 as it is. That is, by engaging both rails on the side other than the side surface to which the link member 31 is directly connected, the floor side end portion 311 of the link member 31 can be directly connected to the side surface of the upper rail 42 so as to be freely rotatable. Is possible. The end 311 on the floor side of the link member 31 is rotatably connected to the upper rail 42 using a support shaft S2 as shown.

  However, in the configuration shown in FIG. 2, the rail device is provided on the left side of the seat because the left side surface of the rail device 40 is configured by one side surface (long side surface) of the connecting portion 421 of the upper rail 42. 40 is applied. The rail device 40 provided on the right side of the seat has a left-right symmetrical shape with the configuration shown in FIG. That is, the rail device 40 having the right side surface constituted by one side surface (longer side surface) of the connecting portion 421 of the upper rail 42 is applied as the rail device 40 provided on the right side of the seat.

  As described above, in the rail device 40 of the vehicle seat 1b according to the present embodiment, one side surface of the rail device 40 is configured only by the connecting portion 421 of the upper rail 42, and the link member 31 is directly on the one side surface. It is pivotally connected. The upper rail 42 is slidably engaged with the lower rail 41 on the side of the upper rail 42 other than the side surface to which the link member 31 is directly connected (upper side and lower side in this embodiment). As described above, according to the vehicle seat 1b according to the present embodiment, the engaging portion of the upper rail 42 and the lower rail 41 is set on the side other than the side to which the link member 31 is connected. , And the space for arranging parts in the vehicle height direction can be further reduced. The engaging portion of the lower rail 41 and the upper rail 42 can be appropriately changed as long as it is a side other than the side surface to which the link member 31 is directly connected (that is, one of the upper surface, the lower surface, and the side surface facing the side surface). It is.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1a, 1b Vehicle seat 10 Seat part 20, 40 Rail apparatus 21, 41 Lower rail 22, 42 Upper rail 221, 421 Connection part 222, 422a, 422b Engagement part 30 Lifter apparatus 31 Link member 311 End part on the floor side

Claims (3)

A lower rail fixed to the floor of the vehicle and an upper rail to which a seating portion of a seat that is slidable along the lower rail is connected. A rail device that is shaped like a hat,
A lifter device having a link member that pivots around the end on the floor side when the seating portion of the seat moves up and down;
With
A vehicle seat, wherein a floor-side end portion of the link member is directly pivotally connected to a side surface of a connection portion of the upper rail. In the rail device,
The upper rail is slidably engaged with the lower rail at both lower sides in the width direction,
The vehicle seat according to claim 1, wherein the connection portion of the upper rail is a portion that is not covered by the lower rail and protrudes upward from the lower rail. In the rail device,
The vehicle seat according to claim 1, wherein the upper rail is slidably engaged with the lower rail on a side of the upper rail other than the side surface to which the link member is directly connected.

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