JPH0212100Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a seat slide device equipped with a power slide mechanism.

"Prior Art" Conventional seat slide devices include those shown in FIGS. 3 and 4, for example.

That is, a threaded rod 2 is installed on the seat side rail 1 along the front-rear direction of the seat so as to be positioned between the left and right rails, and a moving member 3 having a female thread that is screwed onto the threaded rod 2 is mounted on a support bracket extending from the vehicle body side rail 4. 5
A motor 7 is connected to the female screw in the movable member 3 via a drive shaft 6, and the female screw in the movable member 3 is rotated by the motor 7 via the drive shaft 6, so that the female screw in the movable member 3 is The seat side rail 1 is moved back and forth by relatively moving the moving member 3.

Furthermore, as disclosed in Japanese Utility Model Publication No. 57-47225, a male screw shaft is installed in the gap between the upper rail and the lower rail of the seat slide, and a female screw threaded into the male screw shaft is also installed in the gap. There is.

"Problems to be Solved by the Invention" However, in the former case, in such a conventional seat slide device, the load generated when the threaded rod 2 and the movable member 3 move relative to each other causes the support bracket 5 to be damaged. A large bending moment is applied, and in order to withstand this load, the support bracket 5 must be made strong, resulting in problems in that it becomes large and heavy and occupies a large space under the seat.

In the latter case, in order to install a male screw shaft and a female screw threaded therein in the gap between the upper rail and the lower rail of the seat slide,
This requires special efforts in various areas, such as devising the shape of the gap between the upper rail and the lower rail and devising the configuration of the drive mechanism, and the problem is that it cannot be applied to a type of seat slide where the drive mechanism is externally attached. It was hot.

The present invention has been developed by focusing on these conventional problems, and is designed to avoid applying a large bending moment to the bracket that supports the moving member in a seat slide device of the type in which the drive mechanism is externally attached. The purpose of the present invention is to provide a seat slide device that solves the problems.

``Means for Solving the Problems'' The gist of the present invention to achieve this purpose is to slidably fit a seat side rail that supports a seat onto a car body side rail that is fixed to the car body. In a seat slide device equipped with a power seat slide mechanism that moves the seat side rail by power, a screw shaft is disposed so as to closely extend above the seat side rail, and the screw shaft is connected to the seat side rail. The fixed bracket is installed rotatably but immovably in the axial direction via a support bracket fixed to the vehicle body side rail, the base of the fixed bracket is fixed to the bottom surface of the vehicle body side rail, and the fixed bracket is erected from the base along the side part of the seat side rail. A face wall is formed upright, a movable member having a female thread screwed into the screw shaft is disposed close to the upper side of the seat side rail, and the movable member is fixed to the upper end of the vertical wall of the fixed bracket. and a power source for rotating the screw shaft or the female screw of the moving member, and the seat side rail is moved by rotating either of the screw pairs with the power source and relatively moving the screw shaft. The present invention relates to a seat slide device that is movable by power.

"Function" Therefore, the screw shaft is located above the seat side rail and is arranged very close to it, and the movable member moves relative to this screw shaft, and the movable member and the member supporting it move. Since only a very small bending moment is generated between the parts, it is advantageous in terms of strength and there is no need to increase the strength of related parts.The fixing bracket of the screw shaft is located above the seat side rail, so the seat lift mechanism is It can also be used for support and reduce the number of parts.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 and 2 show an embodiment of the present invention.

Seat slide bodies 10, 10 are arranged on the left and right, a power slide mechanism 20 is installed on the seat slide bodies 10, 10, and a seat lift mechanism 30 is further installed on top of the power slide mechanism 20.

The seat slide body 10 is made up of a seat side rail 11 having a downward generally grooved cross section that is slidably fitted onto a vehicle body side rail 12 having an upwardly facing generally grooved cross section. It operates with a screw pair consisting of a threaded shaft 21 and a moving member 22 having a female thread that is screwed into the threaded shaft 21, and the seat side rail 1 of the seat slide body 10
A front support bracket 23 and a rear support bracket 24 are fixed to the front and rear of the upper surface of the screw shaft 21, and a gear box 25 connected to the front end of the screw shaft 21 is fixed to the front support bracket 23, and the rear end of the screw shaft 21 is The screw shaft 21 is rotatably supported by the rear support bracket 24 while being prevented from moving rearward, so that the screw shaft 21 is disposed close to and installed above the seat side rail 11.

The moving member 22 is fixed to the vehicle body side rail 12 via a fixed bracket 26 fixed to the vehicle body side rail 12 of the seat slide main body 10, and a drive shaft 25a is connected to the left and right gear boxes 25, 25, and the fixed bracket An electric motor 27 serving as a drive source is connected to an intermediate portion of the motor 26 via a reduction gear 28 .

The fixed bracket 26 has a base 26a fixed to the bottom surface of the vehicle body side rail 12, an vertical wall 26b is formed rising from the base 26a along the side of the seat side rail 11, and the movable member 22 is attached to the seat side rail 11.
Elevated wall 2 of fixed bracket 26 adjacent to the top of
6b is fixed to the upper end.

The seat lift mechanism 30 supports the seat support members 33 , 33 so as to be movable up and down and tiltable by the front swing member 31 and the rear swing member 32 .
3 and 33 support the cushion frame A.

The front swinging member 31 has swinging levers 31b and 31c fixed to both ends of a lifting shaft 31a that is rotatably installed between the front parts of the seat support members 33 and 33. The base is pivotally connected to pivot pieces 23a, 23a standing upright from the front support bracket 23, and the relay gear 31 is connected to a sector centered on a lifting shaft 31a formed at the tip of the swing lever 31b.
A front lifting motor 34, which is a driving source, is connected via d.

The rear swinging member 32 has the same configuration as the front swinging member 31, and swing levers 32b and 32c are fixed to both ends of a lifting shaft 32a that is rotatably installed between the rear parts of the seat support members 33 and 33. and the swing lever 32b,
The base of 32c is pivotally attached to the side wall of the rear support bracket 24, and the relay gear 32 is arranged in a sector centered on the lifting shaft 32a formed at the tip of the swing lever 32b.
A rear lifting motor 35 serving as a driving source is connected via d.

Next, the action will be explained.

First, the power slide mechanism 20 is powered by an electric motor 2.
When power is applied to 7, the drive shaft 25a is
is rotated, and the screw shafts 21 on both sides are rotationally driven by the gear box 25. Since the female thread in the movable member 22 is designed not to rotate, the movable member 22 moves relative to the screw shaft 21, and the fixed bracket 26 is fixed to the vehicle body side rail 12 and does not rotate relative to the vehicle body. does not move, and the screw shaft 21
And the seat side rail 11 to which it is attached moves.

By switching the rotational direction of the electric motor 27, the seat side rail 11 can be moved forward or backward, and by stopping the power supply to the electric motor 27 at an appropriate position, it can be stopped at that position.

When the screw shaft 21 and the movable member 22 move relative to each other, a large moving load is applied to the fixed bracket 26, but the screw shaft 21
Since the vertical wall 26b is placed close to the vertical wall 26b, the span that generates the bending moment is small, and the vertical wall 26b receives the load in the vertical direction with respect to the direction of the load, so the fixed bracket 26 must have sufficient strength. I can do it. Further, since the moving member 22 is not located between the seat slide bodies 10, 10, the lower part of the seat becomes wider, and the leg space of the rear seat can be increased or used as a storage space.

Next, the operation of the seat lift mechanism 30 will be explained.
To explain the front swinging member 31, when the front lifting motor 34 is energized, the swinging lever 31b is rotated via the relay gear 31d, and the swinging lever 31b rotates around the lifting shaft 31a to support the seat. It is raised and lowered with respect to the member 33. Swing lever 31
The base of b is the pivot piece 23a of the front support bracket 23.
Since the seat support member 33 is pivotally supported, the front portion of the seat support member 33 is relatively raised and lowered by raising and lowering the swing lever 31b.

The rear swinging member 32 is also similar to the front swinging member 31, and when the rear lifting motor 35 is energized, the swinging lever 3
2b is raised and lowered, and the rear part of the seat support member 33 is raised and lowered.

If a strong load is generated that causes the seat side rail 11 to separate from the vehicle body side rail 12 due to an impact load applied to the seat during a collision, etc., since the screw shaft 21 is exactly along the top of the seat slide body 10, Greater resistance to bending stress and higher peel limit.

By combining the movements of the front swinging member 31 and the rear swinging member 32, the inclination angle of the cushion frame A can be adjusted by changing the front and rear heights of the seat support member 33, and the amount of elevation in the front and back can be made approximately the same. It is possible to adjust the height of the entire cushion frame A.

It should be noted that the support bracket for the screw shaft may be provided at either the front or the rear, and it is also effective to arrange only one of the screw shafts above the slide rail on one side.

"Effect of the invention" According to the seat slide device according to the invention, a screw shaft is arranged above the seat side rail, and the seat lift mechanism is also supported by using a support bracket that fixes this screw shaft to the seat side rail. Because of this, the movable parts of the power slide mechanism can be connected to the rails on the vehicle body side via a small span, resulting in a structure that is reasonably strong, making it possible to reduce the size and weight of the parts. . Since the support member for the seat lift mechanism can be omitted, the number of parts can be reduced and manufacturing management costs can be reduced, and the weight and cost can also be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention; Figure 1 is an exploded perspective view of the seat slide device, Figure 2 is a vertical cross-sectional view of the main part, and Figures 3 and 4 are A conventional example is shown, and FIG. 3 is a sectional view of a main part of the seat slide device, and FIG. 4 is a perspective view of the same. DESCRIPTION OF SYMBOLS 10... Seat slide main body, 11... Seat side rail, 12... Vehicle body side rail, 20... Power slide mechanism, 21... Screw shaft, 22... Moving member, 30... Seat lift mechanism.

Claims (1)

[Scope of claim for utility model registration] A seat side rail that supports the seat is slidably fitted onto the vehicle body side rail fixed to the vehicle body, and is equipped with a power seat slide mechanism that moves the seat side rail using power. In the seat slide device, a screw shaft is disposed so as to closely extend above the seat side rail, and the screw shaft is rotatable but immovable in the axial direction via a support bracket fixed to the seat side rail. a base of a fixing bracket is fixed to the bottom surface of the vehicle body side rail, a vertical wall is raised from the base along the side of the seat side rail, and has a female screw threadedly engaged with the screw shaft. A movable member is disposed close to above the seat side rail, the movable member is fixed to the upper end of the vertical wall of the fixed bracket, and a power source for rotating the screw shaft or the internal thread of the movable member is provided. A seat slide device, characterized in that the seat side rail can be moved by power by rotating one of the pair of screws using the power source and relatively moving the screw shaft.