JPH0632162U - Seat slide device - Google Patents

Abstract

(57) [Abstract] [Purpose] The position close to the lower rail member, without impairing the fitting strength between the lower rail member and the upper rail member,
Secure a space for the seat drive mechanism and other equipment. [Structure] On the left and right side portions of the lower rail member 1, guide portions 1A and 1B for slidably guiding the left and right side portions 2A and 2B of the upper rail member 2 are formed, and the right guide portion 1B is provided on the left side. The seat driving mechanism 7 is provided near the guide portion 1B on the right side of the guide portion 1A by lowering the height H from the guide portion 1A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat slide device suitable for use especially for a vehicle seat.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, for example, as a seat slide device for an automobile, guide parts of substantially the same C shape in cross section are formed symmetrically left and right on the left and right side parts of a lower rail member installed on the floor surface inside the car. It is known that the left and right guide portions are slidably fitted to the left and right side portions of an upper rail member having a substantially inverted T-shaped cross section attached to the bottom portion of the seat.

In such a seat slide device, in particular, a belt-in type seat slide in which an end portion of a seat belt is locked to a rear end portion of a seat and a load in a vehicle collision is applied to the locking portion. In the case of the device, it is necessary to sufficiently enhance the fitting strength between the lower rail member and the upper rail member. Therefore, the left and right guide portions of the lower rail member are both relatively large in cross section.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional seat slide device, since the left and right guide portions of the lower rail member are both large in sectional shape, for example, a driving mechanism including a motor is used to slide the upper rail member together with the seat. In the case of (power seat slide device), the large guide part of the lower rail member interferes and the drive mechanism cannot be installed close to the fitting center of the lower rail member and the upper rail member. However, there is a problem that the bracket for connecting the drive mechanism and the upper rail member to transmit power becomes long and the amount of deformation of the bracket becomes large. Further, in order to suppress the deformation of the bracket, it is necessary to take measures such as increasing the thickness of the bracket, resulting in an increase in the weight of the entire device. Also, in the case of the type in which the upper rail member is manually slid together with the seat, the large guide parts on the left and right of the lower rail member are an obstacle, and the position near the lower rail member is effective as a deployment space for other equipment. There is a problem that it will not be available for use.

An object of the present invention is to provide a space for use in a seat drive mechanism or other equipment at a position near the lower rail member without impairing the fitting strength between the lower rail member and the upper rail member. It is to provide a seat slide device that can be secured.

[0006]

[Means for Solving the Problems]

 The seat slide device according to the present invention includes left and right upper rail members that are attached to the bottom of the seat on left and right guide portions having a substantially C-shaped cross section formed on the left and right side portions of the lower rail member installed on the floor. In the seat slide device in which the side portions of the above are slidably fitted, one of the left and right guide portions is formed lower than the other.

[0007]

[Action]

 In the seat slide device of the present invention, one of the left and right guide portions of the lower rail member that guides the left and right side portions of the upper rail member is formed lower than the other, so that the upper rail member and the lower rail member are fitted together. Without compromising the combined strength, a space will be formed in the space above one of the left and right guides for the seat drive mechanism and other equipment.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. This embodiment is an application example as a power seat slide device for an automobile that slides an automobile seat using a drive mechanism including a motor.

In FIG. 1, reference numeral 1 denotes a lower rail member that is installed on a floor surface inside a vehicle and extends in the front and back directions of the paper surface in the figure. Left and right side portions thereof have left and right guides having a substantially C-shaped cross section. The parts 1A and 1B are bent symmetrically. The guide portion 1B on the right side is formed to be lower than the guide portion 1A on the left side by a height H. Reference numeral 2 denotes an upper rail member that is attached to the bottom surface of a seat (not shown) and extends in the front and back directions of the paper surface in the figure, and has a substantially L-shaped cross section that is symmetrically bent and formed on the left and right side portions thereof. The left and right side portions 2A and 2B are slidably fitted in the left and right guide portions 1A and 1B of the lower rail member 1. The right side portion 2B is formed to be lower than the left side portion 2A by a height H. The pair of rail members 1 and 2 slidably fitted in this way are symmetrically provided on the left and right sides of the seat. Further, in the case of the present embodiment, the upper rail member 2 has a joining structure of two left and right plate members 2-1 and 2-2.

Inside the left guide portion 1A, a plurality of rollers 3 located below the left side portion 2A and a plurality of balls 4 located above the side portion 2A respectively roll. It is equipped to move freely. On the other hand, inside the right guide portion 1B, a plurality of rollers 5 located above the right side portion 2B are rollably provided. The rollers 3, balls 4 and 5 are held by a retainer 6 so as to maintain a predetermined positional relationship, and the upper rail member 2 slides smoothly with respect to the lower rail member 1.

Reference numeral 7 denotes a drive mechanism, and in the case of the present embodiment, it has a configuration using a screw shaft 8 and a nut member (not shown) screwed to the screw shaft 8. That is, both ends of the screw shaft 8 are fixed to both ends of the lower rail member 1 (ends in the front and back direction of the paper surface in the figure), and the screw shaft 8 is bridged in parallel with the lower rail member 1, while the upper rail member 2 A gear case 10 and a reversible motor 11 are attached to the right side of the nut via a bracket 9, and a nut that is screwed into the screw shaft 8 at a fixed position in the gear case 10 and is normally and reversely rotated by the motor 11. The members are assembled. Therefore, by controlling the motor 11 to rotate normally or reversely, the nut member slides together with the upper rail member 2 with the screw shaft 8 on the lower rail member 1 side as the fixed side. Further, when the motor 11 stops rotating, the screwing of the screw shaft 8 and the nut member makes it impossible to slide the upper rail member 2. Therefore, the drive mechanism 7 also has the function of locking the seat. The drive mechanism 7 is similarly configured in the two sets of rail members 1 and 2 provided on the left and right sides of the seat, and the motor 11 in the two sets of drive mechanisms 7 can be shared. . The drive mechanism 7 is located near the center of the seat.

In such a seat slide device, however, the right guide portion 1B of the lower rail member 1 located near the drive mechanism 7 is formed lower than the left guide portion 1A by a height H. Accordingly, the gear case 10 of the drive mechanism 7 and the screw shaft 8 can be arranged closer to the lower rail member 1 side. Therefore, the offset amount L of the screw shaft 8 from the fitting center of the rail members 1 and 2 is shortened, and the length of the bracket 9 is also shortened. As a result, the locking strength of the seat is increased, the deformation amount of the bracket 9 is reduced, and the thickness and size of the bracket 9 can be reduced.

FIG. 2 is a diagram for explaining a second embodiment of the present invention. The present embodiment is an example of application as a seat slide device of a type in which a seat is manually slid, and a seat lock mechanism 21 is provided.

The lock mechanism 21 locks the upper rail member 1 so that it cannot slide by engaging the latch 22 on the upper rail member 2 side with the lock hole 1C on the lower rail member 1 side as shown by the solid line in the figure. Further, the lock of the upper rail member 1 is released by rotating the latch 22 in the direction of arrow A as shown by the chain double-dashed line in the figure by the operating lever 23. Further, a contact plate 24 having a substantially inverted U-shaped cross section is fixed to the lower surface of the left side portion 2A of the upper rail member 2, and when the latch 22 is locked, the front end of the latch 22 is fixed. The lock strength of the seat is enhanced by engaging with the cutout portion 24A of the contact plate 24.

However, in the case of the seat slide device of the present embodiment, the upper space of the right guide portion 1A, which is formed lower than the left guide portion 1A by the height H, is a space for installing various in-vehicle devices. Etc. can be effectively used.

[0017]

[Effect of device]

 As described above, the seat slide device of the present invention is configured such that one of the left and right guide portions of the lower rail member that guides the left right side portion of the upper rail member is formed to be lower than the other. Without compromising the strength of fitting of the member and the lower rail member, it is possible to secure a space to be used for disposing the seat drive mechanism and other devices in the space above one of the left and right guide portions.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Lower rail member 1A Left side guide part 1B Right side guide part 2 Upper rail member 2A Left side part 2B Right side part 3 Roller 4,5 Ball 7 Drive mechanism

Claims (2)

[Scope of utility model registration request] 1. A left and right side portion of an upper rail member attached to a bottom portion of a seat in left and right guide portions having a substantially C-shaped cross section formed on left and right side portions of a lower rail member installed on a floor surface. A seat slide device in which the left and right guide parts are formed to be lower than the other in a seat slide device in which is slidably fitted. 2. The seat slide device according to claim 1, wherein a drive mechanism for driving the upper rail is provided at a position near one of the left and right guide portions.