JP4013591B2 - Seat slide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat ride device used to adjust the front / rear position of a vehicle or the like, and a type in which a locking portion of a lock mechanism is built in a lower rail and an upper rail so as to be particularly simple. The present invention relates to a seat ride apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a seat ride apparatus of a type incorporating a locking portion of this type of locking mechanism, one disclosed in Japanese Patent Application Laid-Open No. 9-104266 is known. The seat ride apparatus includes an upper rail that supports the seat, and a lower rail that guides the upper rail so as to be slidable in the front-rear direction of the seat. A first locking flange portion that bends and extends upward is formed on both outer sides of the upper rail cross section perpendicular to the sliding direction, and a second locking flange portion that bends and extends downward on both inner sides of the lower rail cross section. Is formed. The first and second locking flanges are locked to each other and supported so that the upper rail does not peel upward with respect to the lower rail. The locking portion of the locking mechanism built in the upper rail and the lower rail is attached to the upper rail with its movement restricted in the front-rear direction, and a hole provided in the bent portion of the first locking flange portion and the second locking It can be locked with a notch provided at the lower end of the flange. When the locking portion moves downward and is disengaged from the hole and the cutout portion, the restriction of the movement of the upper rail relative to the lower rail is released.
[0003]
[Problems to be solved by the invention]
In the above-described conventional seat slide device, the cutout portion provided at the lower end of the second locking flange portion of the lower rail has a shape opened downward. For this reason, the notch part is easily deformed when an excessive load is applied from the engaging part at the time of locking. In order to increase the lock strength, it is necessary to increase the thickness of the lower rail, which causes an increase in weight.
[0004]
[Means for Solving the Problems]
In order to solve the above technical problem, the first technical means taken in the present invention is that the locking mechanism has a locking portion extending in the width direction of the lower rail and disposed in the space. Provided with a locking hole in the side wall of the upper rail so that the locking portion of the locking member moves vertically and penetrates, and when the locking portion of the locking member is lifted, The lower rail is provided with a to-be-latched hole portion that is unlocked from the locking portion, and the lower rail is opposite to a base portion, a side wall extending upward from the base portion, and a side of the side wall connected to the base portion. A flat portion extending inward in the width direction of the lower rail from the side, and an extending portion extending downward from the side opposite to the side connected to the side wall of the flat portion, the locked hole portion, this provided the bent portion including a connection portion between said flat portion and the extending portion It is.
[0005]
In this way, the latching portion formed in the lower rail is configured to be unlocked by lifting the latching portion with respect to the latched hole portion, releasing the latching, and lowering and latching. Instead of the shape of the notch in which a part of the space in which the is inserted is opened, it is configured as a hole having no open part. As a result, the locked hole portion is hardly deformed by an excessive load acting on the locked hole portion from the locking portion, and the lock strength can be increased.
[0006]
In addition to the first technical means described above, the second technical means taken in the present invention is that the locked portion is provided in a bent portion formed in the lower rail.
[0007]
Since the bent portion of the lower rail has high rigidity, the locked portion is further difficult to deform and a strong lock strength can be realized.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the seat slide device 1 for the seat 10 according to the present invention will be described below with reference to FIGS.
[0009]
As shown in FIGS. 1, 2, and 3, a pair of seat slide devices 1 are arranged on the left and right sides below the seat 10 (FIG. 3), and in the front-rear direction (the front is the left direction in FIGS. 2 and 3) It is attached to extend in parallel. An operation lever 21 for releasing a lock mechanism 2 of the seat slide device 1 to be described later is provided so as to connect the left and right seat slide devices 1. Since the left and right seat slide apparatuses 1 are symmetrical with each other, the structure and operation thereof will be described below taking the seat slide apparatus 1 on only one side as an example.
[0010]
As shown in FIGS. 1 and 4 to 6, the seat slide device 1 includes a lower rail 4 that is fixedly attached to a floor 9 (FIG. 4) of a vehicle. The lower rail 4 has a substantially U-shaped cross section perpendicular to the length direction, and has a space opened upward. The lower rail 4 is formed by bending a base 45 serving as a U-shaped bottom, a side vertical wall 46 extending upward from both sides of the base 45, and an upper end of the side vertical wall 46 approximately horizontally inside the cross section. Further, a flange portion 43 is formed extending further downward from the flat portion 42 through the bent portion 42a. As well shown in FIG. 1, a plurality of locking holes 41 are formed in the bent portion 42 a at equal intervals in the length direction of the lower rail 4.
[0011]
On the other hand, as shown in FIG. 1 and FIGS. 4 to 6, the seat slide device 1 includes an upper rail 5 fixed to the seat 10 (FIG. 2). The upper rail 5 is configured by combining an outer rail 52 and an inner rail 53, and has an inverted U-shaped portion 5a having a space that opens downward in a cross section perpendicular to the length direction. The upper rail 5 extends upward from the inverted U-shaped portion 5a and is bent substantially horizontally from the lower end on both sides of the inverted U-shaped portion 5a to the mounting flange portion 5b fastened to the seat 10. The formed flat portions 52a and 52a, and further flange portions 52b and 52b that are bent and extend upward from the flat portions 52a and 52a are formed.
[0012]
The seat slide device 1 includes a roller 71 disposed so as to be sandwiched between the lower surfaces of the flat portions 52 a and 52 a of the upper rail 5 and the upper surface of the base 45 of the lower rail 4, and flanges 52 b and 52 b of the upper rail 5 and the lower rail 4. A bearing assembly 7 including a ball 73 disposed so as to be sandwiched between the bent portions 42 and a case 72 that combines the roller 71 and the ball 73 as a set is attached. Two sets of bearing assemblies 7 are usually arranged at intervals in the front-rear position of the seat slide device 1 so that the upper rail 5 can move smoothly with respect to the lower rail 4 by rolling of the rollers 71 and the balls 73.
[0013]
As shown in FIGS. 1 and 5, the locking member 3 is disposed inside a space surrounded by the U-shaped portion of the lower rail 4 and the inverted U-shaped portion 5 a of the upper rail 5. A pair of vertical wall portions 31 are provided at the central portion of the locking member 3, and the width dimension of the pair of vertical wall portions 31 is formed to fit within the width of the inverted U-shaped portion 5 a. Each vertical wall 31 is formed with a pivot protrusion 32 that fits in a pivot hole 54 provided on both side walls of the inverted U-shaped portion 5 a of the upper rail 5. The locking member 3 is rotatable with respect to the upper rail 5 with the pivot protrusion 32 as an axis. The locking member 3 is provided with a horizontal plate-shaped locking portion 34 extending rearward from the vertical wall portion 31, and the locking portion 34 has three protruding claw portions 35 a, respectively, on both sides in the width direction. A locking claw 35 comprising 35b and 35c is provided. And each nail | claw part 35a, 35b, 35c is the inside of the reverse U-shaped part 5a in the locking hole 51 which consists of the three holes 51a, 51b, 51c provided in the both-sides side wall of the reverse U-shaped part 5a of the upper rail 5. It fits so as to penetrate from. The locking claw 35 can be engaged with a plurality of locking holes 41 provided in the bent portion 42 a of the lower rail 4.
[0014]
With this configuration, when the locking member 3 rotates around the pivot protrusion 32, the locking claw 35 moves up and down the three locking holes 51. When the locking claw 35 is positioned below the locking hole 51, the tip of the locking claw 35 is fitted with the locking hole 41, and the movement of the upper rail 5 with respect to the lower rail 4 is restricted. When the locking claw 35 is positioned above the locking hole 51, the tip of the locking claw 35 is disengaged from the locking hole 41, and the restriction of the movement of the upper rail 5 with respect to the lower rail 4 is released. . FIG. 6 shows the relationship between the locking claw 35 and the locking hole 41 of the lower rail 4. As can be seen from FIG. 6, the locking hole 41 is provided in the bent portion 42 a, and the locking claw 35 has a shape that can be lifted to the release position indicated by the two-dot chain line without being blocked by the lower rail 4. The space of the locking hole 41 into which the locking claw 35 is inserted is different from the shape of the notch where a part of the locking hole 41 is opened. Even when it acts, the locking hole 41 is more difficult to deform than the shape of the notch. Furthermore, since the locking hole 41 is provided in the bending part 42a with high rigidity, the locking hole 41 becomes stronger. Note that the number of the locking claws 35 is not limited to the above, and is determined in consideration of the lock strength.
[0015]
As shown in FIG. 1, the locking member 3 includes a horizontal plate-shaped contact portion 33 extending forward from the vertical wall portion 31, and the front end of the contact portion 33. It can come into contact with an operation lever 21 described later.
[0016]
A leaf spring 23 is attached to the inside of the upper side of the inverted U-shaped part 5a of the upper rail 5 by two attachment pins 24 arranged in the front and back of each other in the vicinity of the center part thereof. The leaf spring 23 is provided with a rear lever portion 28 extending further rearward than the position of the rear mounting pin 24, and the locking portion 34 of the locking member 3 is moved downward at the rear end abutting end portion 28 a, that is, the locking claw 35. The tip is pushed down so as to fit the locking hole 41. The leaf spring 23 includes a front lever portion 2 7 that extends further forward than the position of the front mounting pin 24, and a rectangular hole 26 b is formed in each of two vertical surface portions that are provided in the front lever portion 2 7 at a distance in the front-rear direction. The end of the operating lever 21 is inserted and fixed in the rectangular hole 26b. By the action of the front lever portion 27 of the leaf spring 23, the front end portion 21a of the operation lever 21 is normally biased to be positioned below.
[0017]
As shown in FIGS. 2 and 3, the end portion of the operation lever 21 inserted into the square 26 b passes through the square 26 b and extends rearward, and is at the upper part of the front end of the contact portion 33 of the locking member 34. Located at a distance. When the front end 21 a of the operation lever 21 is lifted against the urging force of the leaf spring 23, the operation lever 21 rotates clockwise in FIG. 2, and the rear end of the operation lever 21 is the upper surface of the contact portion 33. It is the structure which can be pressed down in contact with. When the abutting portion 33 is pushed down, the locking claw 35 located behind the locking member 34 moves so as to be disengaged upward with respect to the locking hole 41, and the restraint of the upper rail 5 with respect to the lower rail 4 is released.
[0018]
The seat slide device 1 configured as described above operates so that the occupant lifts the operation lever 21, releases the lock mechanism 2, moves the seat 10 to a desired position, and then releases the operation lever 21. The front and rear positions of the seat 10 can be adjusted by returning the lock mechanism 2 to the lock position. In an emergency where a large impact load acts on the seat 10 in the front-rear direction, an excessive impact load acts on the locking claws 35 from the end surfaces of the locking holes 41 and 51. At this time, both the locking hole 41 and the locking hole 51 do not have a partially open shape such as a notch, and thus act so that the shape is difficult to deform and a large lock strength is obtained.
[0019]
【The invention's effect】
According to the present invention, even if the upper or lower rail is made of a thin material, the locking locking holes provided on each of the upper or lower rails are not easily deformed. In addition, a seat slide device with excellent lock strength can be realized.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a seat slide device according to the present invention.
FIG. 2 is a side view of the seat slide device according to the present invention in a locked state.
FIG. 3 is a side view of the seat slide device according to the present invention in an unlocked state.
4 is a cross-sectional view taken along a line AA in FIG.
5 is a cross-sectional view taken along a line BB in FIG.
6 is a cross-sectional view taken along the line CC in FIG. 2. [Description of Symbols]
Lower rail,
An upper rail that supports the seat and is movably engaged with the lower rail;
In a seat slide device provided with a locking portion of a lock mechanism that is housed in a space formed by the lower rail and the upper rail and that operates to restrain or release the movement of the upper rail with respect to the lower rail.
The lower rail is provided with a locked portion that restrains the locking portion in the moving direction with respect to the upper rail and that is unlocked from the locking portion when the locking portion is lifted upward. A featured seat ride device.
1 Seat ride device
2 Locking mechanism 4 Lower rail 5 Upper rail 10 Seat 34 Locking portion 41 Locked portion 42 Bending portion

Claims (2)

A lower rail, an upper rail that supports a seat and is movably engaged with the lower rail, and is disposed in a space formed between the lower rail and the upper rail, and restrains the movement of the upper rail with respect to the lower rail, or In the seat slide device including a lock mechanism that operates so as to release the restraint of movement, the lock mechanism includes a locking portion that extends in a width direction of the lower rail and is disposed in the space. A locking hole is provided in the side wall of the upper rail so that the locking portion of the locking member moves vertically and penetrates, and the locking portion of the locking member is lifted provided the locked hole locking is disengaged and the locking portion to the lower rail, the lower rail includes a base, a side wall which extends upwardly from the base, before A plane portion extending inward in the width direction of the lower rail from the side opposite to the side connected to the base portion of the side wall, and an extending portion extending downward from the side opposite to the side connected to the side wall of the plane portion. The seat slide device is characterized in that the locked hole portion is provided in a bent portion including a connecting portion between the flat portion and the extending portion . The seat slide device according to claim 1, wherein the locked portion is provided in a bent portion formed in the lower rail.

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