CN110901478B - Seat sliding device - Google Patents

Abstract

The present invention provides a seat sliding device capable of moving an upper rail with a simple structure. The seat sliding device (2) includes: a lower rail (10) capable of being mounted on a vehicle body; an upper rail (20) movably engaged with the lower rail (10); a driving roller (31); and an actuator (32 ). The driving roller (31) is installed on the upper guide rail (20) and pressed against the lower guide rail (10) or the vehicle body. The actuator ( 32 ) is capable of rotating the drive roller 31 . Since the seat slide device (2) only needs to add a drive roller and an actuator to the existing seat slide device without power, the structure is simple.

Description

seat slide

technical field

The technology disclosed in this specification relates to a seat sliding device for moving a seat of an automobile by an actuator.

Background technique

There is known a seat sliding device which moves (slides) a seat by means of an actuator. The seat slide device includes a long lower rail attached to the vehicle body and an upper rail engaged with the lower rail. A seat is installed on the upper rail. In the seat slide device disclosed in Japanese Patent Application Laid-Open No. 2004-210113, a lead screw is disposed inside the lower rail. On the other hand, the upper rail includes a screw nut screwed with the lead screw, an actuator and a worm gear (wormgear) that rotate the screw nut. When the spindle nut is rotated using the actuator and worm gear, the upper rail (ie seat) moves with the spindle nut.

In the seat sliding device disclosed in Japanese Patent Laid-Open No. 2004-210113, a louver covering the opening of the lower rail is provided so that dust does not adhere to the lead screw. The louver is in the shape of an endless belt and is wound between rollers arranged at both ends of the lower rail. An upper side portion of the louver extending in parallel between the pair of rollers blocks the opening. A hole is provided in the louver door, and the upper rail protrudes upward from the inner side of the lower rail through the hole. It is a structure in which the shutter door follows and moves when the upper guide rail moves.

The seat sliding device disclosed in Japanese Patent Application Laid-Open No. 2018-020665 includes a spherical rotating body in contact with the floor of the vehicle body and a plurality of actuators that rotate the rotating body in two directions perpendicular to each other. Since the rotating body rotates in two directions, the seat slide device can freely move two-dimensionally on the floor surface of the vehicle body.

Contents of the invention

The moving mechanism of the seat sliding device disclosed in Japanese Patent Laid-Open No. 2018-020665 has a complicated structure and high cost. One technique disclosed in this specification provides a seat slide device capable of moving an upper rail by an actuator with a simple structure.

In the seat sliding device disclosed in Japanese Patent Application Laid-Open No. 2004-210113, a complicated mechanism is required to prevent dust from adhering to the lead screw. Another technique disclosed in this specification provides a seat slide device capable of preventing, with a simple structure, adhesion of dust that may cause a malfunction of a mechanism that moves an upper rail.

One technique disclosed in this specification provides a seat sliding device having the following structure. This seat slide device includes: a lower rail attachable to a vehicle body; an upper rail attachable to a seat and movably (slidably) engaged with the lower rail; rollers; and an actuator. The rollers are mounted on the upper rails. The rollers are pressed against the lower rail or body. An actuator rotates the roller. Since the seat slide device only needs to add rollers and actuators to the existing seat slide device without power, the structure is simple.

One aspect of the seat slide device disclosed in this specification may have the following configurations. The lower rail is arranged in a groove provided in the bottom panel of the vehicle body. The roller is pressed against the upper surface of the cover covering the gap between the groove of the bottom panel and the lower rail. The cover may be made of metal, but it is more preferably made of resin. The resin cover has a high coefficient of friction, and by pressing the roller driven by the actuator against the upper surface of the resin cover with a high friction coefficient, the roller is less likely to slip. It is more preferable that the resin-made cover has the hanging part which enters between a groove and a lower rail on the lower surface.

Another aspect of the seat slide device disclosed in this specification may have the following configurations. A plurality of rollers are provided on the upper rail. One or more rollers are pressed against the side plate on one side in the short-side direction of the lower rail from the inner side of the lower rail, and the remaining rollers are pressed against the other side plate from the inner side of the lower rail. The actuator rotates at least one of the plurality of rollers. In the seat slide device of this form, first, since the driven roller is disposed inside the lower rail, the overall size of the device may be the same as that of a conventional seat slide device. Second, since the rollers are pressed toward the respective side plates from the center side in the short-side direction of the lower rail, frictional force between the rollers and the side plates can be increased. Therefore, the roller is less likely to slip.

Still another aspect of the seat sliding device disclosed in this specification may have the following configuration. The lower guide rail has: a base plate; a pair of side plates extending upward from both ends of the lower guide rail in the short side direction of the base plate; an upper plate extending from the upper end of each side plate toward the center side of the lower guide rail in the short side direction; An inner plate in which an end portion on the center side of the upper plate (the center side in the short-side direction of the lower rail) extends downward. The upper rail is provided with a pair of rollers that abut on connection corners that are connection corners between each upper plate and an inner plate connected to the upper plate. The respective diameters of the pair of rollers gradually increase toward the center side (the center side in the short-side direction of the lower rail). In the seat slide device of the above aspect, the pair of rollers whose diameter gradually increases is strongly sandwiched between the pair of connecting corners of the lower rail due to the rigidity in the short-side direction of the lower rail. As a result, the frictional force between the roller and the connection corner increases, making it difficult for the roller to slip.

Another technique disclosed in this specification provides a seat sliding device having the following structure. The seat slide device includes: a lower rail attachable to a vehicle; an upper rail attachable to a seat; and a belt. The belt is configured along the lower rail. Both ends of the strap are secured. The upper rail is movably engaged with the lower rail. The upper rails are equipped with actuators for the conveyor belt. Also, the actuator transmits power to the lower surface of the belt. In this seat slide device, the upper rail (seat) is moved by transmitting power to the lower surface of the belt where dust is less likely to adhere, so troubles caused by adhesion of dust are less likely to occur.

The actuator may also have a drive roller or a drive gear in contact with the lower surface of the belt. In the former case, the belt is preferably a friction belt that transmits power by friction between the lower surface and the drive roller. In the latter case, a toothed belt is preferably provided on the lower surface with teeth that engage with the drive gear. A toothed belt is also called a cogged belt.

The belt can also be arranged inside the lower rail. Dust is less likely to adhere to the underbody with the belt exposed to the vehicle body. In addition, since the belt cannot be seen by the rider, the appearance is good.

Or, it is also possible that the upper part of the lower guide rail is opened along the long side direction of the guide rail, and the belt covers the opening. The belt used to move the upper rail (seat) doubles as a cover to keep dust from getting inside the lower rail. In addition, in the case of a toothed belt, the teeth of the belt may be fitted into the openings of the lower rail. The toothed belt does not easily come out of the opening.

An example of an actuator for the upper rail is as follows. The actuator includes: a pair of guides arranged at both ends of the upper rail in the guide rail longitudinal direction and in contact with the upper surface of the belt blocking the opening; The lower surface of the drive roller abuts or the drive gear engages with the teeth of the lower surface. The upper rail can be moved with a simple mechanism.

The details and further improvements of the techniques disclosed in this specification will be described in the following "Detailed Description of Embodiments".

Description of drawings

Fig. 1 is a side view of a seat sliding device of a first embodiment.

Fig. 2 is a sectional view of the seat slide device cut along a plane perpendicular to the longitudinal direction of the guide rail.

Fig. 3 is a sectional view of a seat sliding device of a second embodiment.

Fig. 4 is a sectional view of a seat sliding device of a third embodiment.

Fig. 5 is a sectional view of a seat sliding device of a fourth embodiment.

Fig. 6 is a sectional view of a seat sliding device of a fifth embodiment.

Fig. 7 is a sectional view of a seat sliding device of a sixth embodiment.

Fig. 8 is a sectional view of a seat sliding device of a seventh embodiment.

Fig. 9 is a sectional view of a seat sliding device of an eighth embodiment.

Fig. 10 is a schematic plan view of the seat slide device of the eighth embodiment.

Fig. 11 is a side view of the seat sliding device of the ninth embodiment.

Fig. 12 is a cross-sectional view of the seat slide device cut along a plane perpendicular to the longitudinal direction of the guide rail.

Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12 .

Fig. 14 is a sectional view of a seat sliding device of a tenth embodiment.

Fig. 15 is a cross-sectional view taken along line XV-XV in Fig. 14 .

Fig. 16 is a perspective view of a seat sliding device of an eleventh embodiment.

Fig. 17 is a sectional view taken along line XVII-XVII of Fig. 16 .

Fig. 18 is a sectional view taken along line XVIII-XVIII of Fig. 16 .

Fig. 19 is a cross-sectional view taken along the XZ plane of the seat slide device of the eleventh embodiment.

Fig. 20 is a cross-sectional view taken along the XZ plane of the seat slide device of the twelfth embodiment.

Fig. 21 is a cross-sectional view of the seat slide device of the thirteenth embodiment cut in front of the upper rail.

detailed description

(First Embodiment) A seat slide device 2 according to a first embodiment will be described with reference to the drawings. FIG. 1 shows a side view of a seat sliding device 2 mounted on an automobile. The seat slide device 2 is composed of a lower rail 10 and an upper rail 20 . The lower guide rail 10 is a strip. The upper rail 20 is installed movably (slidably) in the longitudinal direction thereof with respect to the lower rail 10 . The lower rail 10 is fixed to the floor 90 of the vehicle body. The upper rail 20 is installed on the lower portion of the seat cushion 81 of the seat 80 . The upper rail 20 is attached to the lower portion of the seat cushion 81 via a frame not shown. The seat sliders 2 are respectively attached to the left and right of the lower portion of the seat cushion 81 . The X direction of the coordinate system in the figure corresponds to the rail longitudinal direction of the lower rail 10 and the upper rail 20 . The Y direction corresponds to the short side direction of the guide rail. The +Z direction of the coordinate system in the figure represents the upward direction.

A drive roller 31 driven by an actuator is attached to the upper rail 20 . Illustration of the actuator is omitted in FIG. 1 . The drive roller 31 is in contact with the bottom plate 90 . The upper rail 20 is movable relative to the lower rail 10 by drive rollers 31 driven by actuators. That is, the seat sliding device 2 can electrically move (slide) the seat.

FIG. 2 shows a cross-sectional view of the seat sliding device 2 . The cross section in FIG. 2 shows a cross section taken by cutting the lower rail 10 and the upper rail 20 on a plane perpendicular to the rail longitudinal direction (X direction). FIG. 2 is a cross-sectional view of the upper rail 20 cut in front of an actuator 30 described later. In addition, a locking mechanism for fixing the upper rail 20 to the lower rail 10 is provided on the upper rail 20 , but the illustration of the locking mechanism is omitted. The locking mechanism is the same as that provided in the conventional seat sliding device, and therefore description thereof will be omitted.

Referring to FIG. 2 , first, the shape of the lower rail 10 will be described. The lower rail 10 is accommodated in a rail groove 91 provided on a floor panel 90 . The lower rail 10 includes a floor panel 3 attached to the vehicle body, a pair of outer vertical panels 4 , a pair of upper panels 5 , and a pair of inner vertical panels 6 . A pair of outer vertical plates 4 extend upward from both ends of the bottom plate 3 in the short side direction of the guide rail (Y direction in the figure). A pair of upper plates 5 extends laterally from the upper ends of the respective outer vertical plates 4 toward the center in the short side direction of the rail. A pair of inner vertical plates 6 extends downward from the inner end of each upper plate 5 . A pair of inner longitudinal plates 6 face each other. Between the pair of inner vertical plates 6, the lower rail 10 opens upward. The upper surface of the lower rail 10 is opened elongatedly along the rail longitudinal direction.

The upper rail 20 will be described. The main body lower portion 22 of the upper rail 20 is located inside the lower rail 10 and supports the driven roller 23 . The driven roller 23 is in contact with the bottom plate 3 of the lower rail 10, so that the movement of the upper rail 20 is smooth. The upper rail 20 is movable (slidable) along the longitudinal direction of the lower rail 10 . The main body upper part 21 of the upper rail 20 is exposed to the upper side than the lower rail 10 . A frame (not shown) is attached to the upper body portion 21, and a seat cushion 81 (see FIG. 1 ) is fixed to the frame. The upper body part 21 and the lower body part 22 are connected through the opening of the lower rail 10 . In other words, a part of the upper rail 20 (the lower body part 22 ) is located inside the lower rail 10 , and the remaining part (the upper body part 21 ) protrudes upward from the lower rail 10 through the opening of the lower rail 10 .

An actuator 30 is fixed to the main body upper portion 21 of the upper guide rail 20 , and a drive roller 31 is fixed to an output shaft of the actuator 30 . The actuator 30 consists of a motor and a gear set. The drive shaft of the motor is connected to the input shaft of the gear set, and the output shaft of the gear set (the output shaft of the actuator 30 ) is connected to the drive roller 31 . The gear set decelerates and transmits the rotation of the motor to the drive roller 31 . The driving roller 31 is pressed against the upper surface 90 a of the bottom panel 90 . The drive roller 31 is rotated by the actuator 30 . As described above, the upper rail 20 is movable in the longitudinal direction thereof relative to the lower rail 10 by the actuator 30 and the drive roller 31 . Rubber is pasted on the outer peripheral surface of the drive roller 31 that is in contact with the bottom plate 90 , and the drive roller 31 can rotate relative to the bottom plate 90 without slipping.

As described above, the seat slide device 2 of the first embodiment has a simple structure in which the actuator 30 and the drive roller 31 are only added to the existing seat slide device that does not include an actuator.

(Second Embodiment) Fig. 3 shows a cross-sectional view of a seat sliding device 2a of a second embodiment. The cross-sectional view of FIG. 3 shows a cross-section of the lower rail 10 and the upper rail 20 taken along a plane perpendicular to the rail longitudinal direction (the X direction in the coordinate system in the drawing) similarly to the cross-sectional view of FIG. 2 . FIG. 3 is a cross-sectional view in which the upper rail 20 is cut in front of the actuator 30 , similarly to FIG. 2 .

The upper rail 20 of the seat slide apparatus 2a of the second embodiment also includes the actuator 30 and the drive roller 31 similarly to the seat slide apparatus 2 of the first embodiment. The drive roller 31 is connected to the output shaft of the actuator 30 . Unlike the seat slide apparatus 2 of the first embodiment, the driving roller 31 is not pressed against the upper surface 90 a of the bottom plate 90 but is pressed against the upper plate 5 of the lower rail 10 . The upper rail 20 of the seat slide apparatus 2 a of the second embodiment can also be electrically moved relative to the lower rail 10 in the longitudinal direction thereof by the actuator 30 and the drive roller 31 .

(Third Embodiment) Fig. 4 shows a cross-sectional view of a seat sliding device 2b of a third embodiment. The cross-sectional view of FIG. 4 also shows a cross-section taken by cutting the lower rail 10 and the upper rail 20 with a plane perpendicular to the longitudinal direction of the rails (the X direction of the coordinate system in the figure) similarly to the cross-sectional views of FIGS. 2 and 3 . .

On the upper rail 20 of the seat slide apparatus 2b of the third embodiment, an actuator 30 and a driving roller 31 are also mounted. However, in the case of the third embodiment, the actuator 30 is mounted on the upper rail 20 via the frame 29 fixed to the main body upper portion 21 of the upper rail 20 . As mentioned above, the seat cushion is attached to the frame 29 (refer FIG. 1). The drive roller 31 is connected to the output shaft of the actuator 30 , and the drive roller 31 is pressed against the upper surface of the bottom panel 90 . The seat slide device 2 b of the third embodiment is also capable of electrically moving the upper rail 20 relative to the lower rail 10 in the longitudinal direction thereof by the actuator 30 and the drive roller 31 .

(Fourth Embodiment) Fig. 5 shows a cross-sectional view of a seat sliding device 2c of a fourth embodiment. The seat slide device 2c of the fifth embodiment includes a pair of T-shaped moldings 93 .

A pair of T-shaped moldings 93 are provided to block the gap between the inner surface 94 of the guide rail groove 91 of the bottom plate 90 and the lower guide rail 10 . The T-shaped molding 93 includes: a flat portion 93b covering the upper surface of the bottom panel 90 and the upper plate 5 of the lower rail 10; The hanging portion 93a is inserted into the gap between the inner surface 94 of the rail groove 91 and the lower rail 10 . In other words, the T-shaped molding 93 enters the gap between the rail groove 91 and the lower rail 10 , and covers both sides of the gap (the bottom panel 90 and the upper panel 5 of the lower rail 10 ). The T-shaped molding 93 is made of highly flexible resin.

In the seat slide device 2 c of the fourth embodiment, the driving roller 31 is pressed against the upper surface of the T-shaped molding 93 . As described above, the T-shaped molding 93 is made of highly flexible resin and has a high coefficient of friction on the surface. Therefore, it is difficult for the drive roller 31 to slide with respect to the T-shaped molding 93 . The seat sliding device 2c of the fourth embodiment has the advantage that the driving roller 31 does not easily slide. In addition, since the T-shaped molding 93 has a hanging portion 93a inserted into the gap between the rail groove 91 and the lower rail 10, it has the advantage that the T-shaped molding 93 is not easily shifted even if the driving roller 31 moves on the upper surface.

The T-shaped molding 93 is an example of a cover covering the gap between the rail groove 91 and the lower rail 10 . Although it is not as good as the advantage obtained when the T-shaped molding 93 is used, the driving roller 31 may be moved on a cover covering the gap between the rail groove 91 and the lower rail 10 instead of the T-shaped molding 93 . The cover is preferably made of resin, but may be made of a material other than metal.

(Fifth Embodiment) Fig. 6 shows a cross-sectional view of a seat sliding device 2d of a fifth embodiment. In the seat slide device 2d, the lower rail 10 is fixed to the upper surface of the flat bottom panel 90, and the outer vertical plate 4 is exposed. The drive roller 31 is pressed against the exposed outer vertical plate 4 of the lower rail 10 from the outside.

(Sixth Embodiment) Fig. 7 shows a cross-sectional view of a seat sliding device 2e of a sixth embodiment. In the seat slide device 2 e , the drive roller 31 is pressed against the inner vertical plate 6 of the lower rail 10 . In addition, in FIG. 7, illustration of the actuator which drives the drive roller 31 is abbreviate|omitted. In the seat slide device 2e of the sixth embodiment, since the drive roller 31 is located inside the lower rail 10, an increase in the volume of the device as a whole is suppressed.

(Seventh Embodiment) Fig. 8 shows a cross-sectional view of a seat sliding device 2f of a seventh embodiment. The structural features of the lower rail 10 will be described again. The lower rail 10 includes a bottom plate 3 , a pair of outer vertical plates 4 , a pair of upper plates 5 , and a pair of inner vertical plates 6 . A pair of outer longitudinal plates 4 extend upward from both ends of the bottom plate 3 in the short-side direction of the guide rail. A pair of upper plates 5 extend from the upper ends of the respective outer vertical plates 4 to the center side of the guide rail 10 in the guide rail short-side direction. The pair of inner vertical plates 6 extend downward from the end portions of the respective upper plates 5 on the center side in the guide rail short-side direction.

A pair of drive rollers 131 are provided on the upper rail 20 of the seat slide device 2f. A pair of driving rollers 131 is also connected to the output shaft of the actuator 30 . The pair of driving rollers 131 abuts on the connection corners 8 between the upper plate 5 and the inner vertical plate 6 of the lower rail 10 , respectively. The diameter of the drive roller 131 gradually increases from the outer side in the short-side direction of the lower rail 10 to the center side. In other words, the drive roller 131 has a tapered shape that increases in diameter from the outer side in the short side direction of the guide rail toward the center side.

In addition, a spring 33 is provided between the upper portion of the actuator 30 and the main body upper portion 21 of the upper rail 20 . The spring 33 presses the actuator 30 downward. The spring 33 presses the driving roller 131 against the lower guide rail 10 through the actuator 30 .

In the seat slide device 2f of the seventh embodiment, the drive roller 131 whose diameter gradually increases toward the center side in the rail short side direction of the lower rail 10 is pressed against the connection corner portion 8 of the lower rail 10 . By this pressing force, a load toward the outer side of the rail is generated on the pair of connecting corners 8 , and the pair of connecting corners 8 deforms outward in the lateral direction of the rail. The restoring force against the deformation acts so that the pair of connection corners 8 are directed toward the center side in the short side direction of the rail. This restoring force acts strongly on the tapered surface of the tapered drive roller 131 . Due to the restoring force acting on the driving roller 131, the driving roller 131 is less likely to slip. The drive roller 131 of the seat slide device 2 f of the seventh embodiment becomes significantly less slidable with respect to the lower rail 10 .

(Eighth Embodiment) Fig. 9 shows a cross-sectional view of a seat sliding device 2g of an eighth embodiment. In the seat slide device 2 g , the drive roller 31 is pressed against the outer vertical plate 4 from the inner side of the lower rail 10 . In addition, in FIG. 9, illustration of the actuator which drives the drive roller 31 is abbreviate|omitted. In the seat slide device 2g of the eighth embodiment, since the drive roller 31 is located inside the lower rail 10, an increase in the volume of the device as a whole is suppressed.

FIG. 10 shows a schematic top view of the seat slide 2g. Fig. 10 is a view of the seat slide device 2g viewed from the +Z direction of the coordinate system in the figure. In FIG. 10, the upper rail 20 is drawn with phantom lines. Since the actuator 30, the driving roller 31 and the second driven roller 39 are hidden from the upper rail 20, they are drawn with dotted lines.

As shown in FIG. 10 , the seat slide device 2 g includes two second driven rollers 39 in addition to the driving roller 31 . The driving roller 31 is pressed against the outer longitudinal plate 4 on one side of the lower guide rail 10 from the center side of the guide rail short side direction of the lower guide rail 10 , and the two second driven rollers 39 are pressed from the center side of the lower guide rail 10 in the guide rail short side direction. Pressed against the outer longitudinal panel 4 on the other side. The seat sliding device 2g has a plurality of rollers (a driving roller 31 and a second driven roller 39), one of which (the driving roller 31) is pressed against the outer vertical plate 4 on one side from the center side of the lower rail 10, and the rest The roller (second driven roller 39 ) is pressed against the outer vertical plate 4 on the other side from the center side of the lower rail 10 . That is, in the seat slide device 2g, the plurality of rollers are dispersedly pressed from the center side in the rail short-side direction of the lower rail toward both outer sides. With this structure, the driving roller 31 is strongly pressed against the outer vertical plate 4 of the lower rail 10 , so that the driving roller 31 is less likely to slide relative to the lower rail 10 .

In addition, 2 g of seat slide apparatuses may be equipped with two or more drive rollers. That is, the seat slide device has a plurality of rollers, one or several of these rollers are pressed against one side plate from the inner side of the lower rail, and the remaining rollers are pressed against the other side plate from the inner side of the lower rail. One or several of the rollers are driven by actuators.

Notes on techniques described in the examples will be described. The motor included in the actuator 30 is an electric motor. That is, the seat slide apparatuses 2, 2a to 2g of the embodiment can electrically move the upper rail (that is, the seat). In addition, a switch for activating the actuator is provided on the seat. A switch to activate the actuator may also be located on the driver's seat.

The seat sliding devices 2, 2a to 2g of the embodiment can all move the upper rail 20 (that is, the seat) electrically with a simple structure.

(Ninth Embodiment) A seat slide device 2h of a ninth embodiment will be described with reference to the drawings. Fig. 11 shows a side view of the seat sliding device 2h mounted on an automobile. The seat slide device 2 is composed of a lower rail 10 and an upper rail 20 . The upper rail 20 is slidably (slidably) mounted relative to the lower rail 10 . The lower rail 10 is fixed to the floor panel 90 of the vehicle. The upper rail 20 is installed on the lower portion of the seat cushion 81 of the seat 80 . The seat sliders 2 are respectively attached to the left and right of the lower portion of the seat cushion 81 . Details will be described later, but an actuator is provided on the upper rail 20 . Illustration of the actuator is omitted in FIG. 11 . The upper rail 20 is movable relative to the lower rail 10 by an actuator. That is, the seat sliding device 2 can electrically move (slide) the seat.

Fig. 12 shows a cross-sectional view of the seat slide device 2h. The cross section in FIG. 2 shows a cross section taken by cutting the lower rail 10 and the upper rail 20 on a plane perpendicular to the rail longitudinal direction (X direction). FIG. 12 is a cross-sectional view of the upper rail 20 cut in front of an actuator 30 described later. FIG. 13 shows a cross-sectional view along line XIII-XIII of FIG. 12 . FIG. 13 corresponds to a cross section taken along a plane crossing the actuator 30 . FIG. 12 corresponds to a cross-sectional view taken along line XII-XII of FIG. 13 . 12 , 2 h of seat sliding devices of FIG. 13 are respectively attached to the left and right of the lower part of the seat cushion 81 . In FIG. 12 , to facilitate understanding, portions other than the cross section of the belt 40 (described later) are shown in gray.

A locking mechanism for fixing the upper rail 20 to the lower rail 10 is provided on the upper rail 20 , but the illustration of the locking mechanism is omitted. The locking mechanism is the same as that provided in the conventional seat sliding device, and therefore description thereof will be omitted.

The basic structure of the lower rail 10 and the upper rail 20 of the seat slide device 2h is the same as that of the seat slide device 2, and thus detailed description thereof will be omitted.

Belts 40 are arranged beside the lower rail 10 in the short-side direction. As shown in FIG. 13 , the belt 40 extends along the longitudinal direction of the lower rail 10 , and its both ends are fixed to the auxiliary plate 7 by bolts 99 . The auxiliary plate 7 is connected to the bottom plate 3 of the lower rail 10 , is bent upward along one outer vertical plate 4 , and is bent outward in the short direction (Y direction) of the lower rail 10 at approximately the same height as the upper plate 5 . The belt 40 is placed on the auxiliary plate 7 . A T-shaped molding 92b is sandwiched between the belt 40 and the auxiliary plate 7 .

The belt 40 is a toothed belt, and the belt 40 is arranged such that the teeth 41 are located on the lower surface side. The teeth 41 engage with the drive gear 32 described later. The belt 40 is made of resin or rubber.

A pair of T-shaped moldings 92a, 92b are provided to block the opening of the lower rail 10 . The T-shaped molding 92a is sandwiched between the guide rail groove 91 and the outer vertical plate 4 to be fixed. The T-shaped molding 92b is fixed between the outer vertical panel 4 and the auxiliary panel 7 . A T-shaped molding 92b largely expands toward the outside of the lower rail 10 in the rail short-side direction. The T-shaped fillet 92b extends to the underside of the strap 40 . The T-shaped moldings 92a, 92b are made of soft resin.

On the upper rail 20, an actuator 30 is provided. The actuator 30 winds up the belt 40 arranged along the lower rail 10 , and has a drive gear 32 on the lower surface of the belt 40 for transmitting power. The actuator 30 includes two guide rollers 31a, 31b. The two guide rollers 31 a and 31 b are in contact with the upper surface of the belt 40 placed on the auxiliary plate 7 . The drive gear 32 is arrange|positioned between two guide rollers 31a, 31b. The belt 40 that has passed one guide roller 31 a is pulled away from the auxiliary plate 7 and wound around the upper side of the drive gear 32 . The drive gear 32 engages with teeth 41 on the lower surface of the belt 40 . The belt 40 that has passed the upper side of the drive gear 32 passes under the other guide roller 31 b and is placed on the auxiliary plate 7 again.

The drive gear 32 is rotated by a motor 35 . When the drive gear 32 rotates, power is transmitted to the belt 40 . Power is transmitted to the teeth 41 of the lower surface of the belt 40 . Both ends of the belt 40 are fixed to the auxiliary plate 7 as described above. Therefore, the upper rail 20 moves in the rail longitudinal direction by the power transmitted by the belt 40 . That is, the seat sliding device 2 can electrically move the seat. The drive gear 32 and the guide rollers 31a, 31b are covered by a cover 61 .

In the seat slide device 2h, the drive gear 32 transmits power to the lower surface of the belt 40 . The teeth 41 of the belt 40 are provided on the lower surface of the belt 40 . Therefore, dust is less likely to adhere to the teeth 41 . Since dust is less likely to adhere to the teeth 41 for transmitting power, it is less likely to cause trouble in the mechanism for electrically moving the seat. In addition, since the teeth 41 are provided on the lower surface side of the belt 40, the occupants of the vehicle cannot see the teeth 41, and the appearance is good.

In addition, since the belt 40 is placed on the auxiliary plate 7 attached to the bottom plate 3 of the lower rail 10 , it can be attached to the bottom panel 90 together with the lower rail 10 . The operation of mounting the seat sliding device 2 including the belt 40 on the vehicle becomes easy.

(Tenth Embodiment) A seat slide device 2i according to a tenth embodiment will be described with reference to Fig. 14 and Fig. 15 . FIG. 14 shows a cross-section cut along the center of the seat slide device 2i in the guide rail short side direction (Y direction in the figure). FIG. 15 shows a cross section along line XV-XV in FIG. 14 . FIG. 14 corresponds to a cross section along line XIV-XIV in FIG. 15 . The seat slide device 2i includes an upper rail 120 and a lower rail 110 . Also in FIGS. 14 and 15 , the illustration of the locking mechanism for fixing the upper rail 120 to the lower rail 110 is omitted.

In the seat slide device 2i, the belt 40 is arranged inside the lower rail 110. As shown in FIG. The belt 40 is arranged such that the teeth 41 are located on the lower side. The belt 40 is placed on the bottom plate 3 . Both ends of the belt 40 are fixed to the lower rail 110 by bolts 99 .

Components of the actuator 130 of the upper rail 120 except the motor 35 are equipped inside the main body of the upper rail 120 . The actuator 130 includes a pair of guide rollers 31a, 31b, a drive gear 32a, a driven gear 32b, and sub rollers 33a, 33b in addition to the motor 35. The guide rollers 31 a and 31 b are in contact with the upper surface of the belt 40 placed on the bottom plate 3 . The belt 40 that has passed the guide roller 31a is pulled away from the bottom plate 3, and wound around the upper side of the drive gear 32a. Teeth 41 provided on the lower surface of the belt 40 engage with the drive gear 32a. The belt 40 is sandwiched between the drive gear 32a and the sub roller 33a, and does not come off the drive gear 32a. The drive gear 32a is rotated by the motor 35 . When the drive gear 32a rotates, power is transmitted to the lower surface of the belt 40 . Since both ends of the belt 40 are fixed to the lower rail 110 , the upper rail 120 is moved by the driving force of the motor 35 . That is, the seat moves electrically.

The belt 40 that has passed between the drive gear 32a and the sub roller 33a passes between the driven gear 32b and the sub roller 33b, then passes under the guide roller 31b, and returns to the chassis 3.

In the seat slide device 2 i of the tenth embodiment, the actuator 130 (drive gear 32 a ) also transmits power to the lower surface of the belt 40 . Since the teeth 41 are provided on the lower surface of the belt 40 , dust is less likely to adhere to the teeth 41 . Therefore, troubles are less likely to occur in the mechanism for moving the upper rail 120 (seat). In addition, in the seat slide device 2 i , the belt 40 is arranged inside the lower rail 110 and passes through the inside of the upper rail 120 . Therefore, since the belt 40 cannot be seen from the surroundings, the seat slide device 2i has good appearance.

(Eleventh Embodiment) A seat slide device 2j according to an eleventh embodiment will be described with reference to FIGS. 16 to 19 . Fig. 16 shows a perspective view of the seat sliding device 2j. FIG. 17 is a cross-sectional view along line XVII-XVII of FIG. 16 , and FIG. 18 is a cross-sectional view along line XVIII-XVIII of FIG. 16 . Fig. 19 is a cross-sectional view of the seat slide device 2j cut at the center in the short-side direction. Fig. 19 is a cross-sectional view of the seat slider 2j cut along the XZ plane of the coordinate system in the figure.

In the seat slide device 2 j , the belt 40 is arranged so as to close the opening W of the lower rail 210 . The opening W is a space between the pair of inner vertical plates 6 . In other words, the lower rail 210 has an opening W on its upper surface that is elongated along the rail longitudinal direction. As shown in FIG. 17 , the lower body part 22 of the upper guide rail 220 is connected to the upper body part 21 through the opening W. The main body lower portion 22 located inside the lower rail 210 is a portion supporting the driven roller 23 . As shown in FIG. 16 , both ends of the belt 40 are fixed to the front end 11 a and the rear end 11 b of the lower rail 110 by bolts 99 . In FIG. 18 , to facilitate understanding, portions other than the cross section of the belt 40 are shown in gray. The belt 40 is a toothed belt provided with teeth 41 on the lower surface. The width of the teeth 41 is narrower than that of the belt 40 , and the teeth 41 fit into the opening W of the lower rail 210 .

The actuator 230 provided on the upper rail 220 is equipped in the main body upper portion 21 of the upper rail 220 in addition to the motor 35 . The actuator 230 includes a pair of guide rollers 31a, 31b, a drive gear 32a, a driven gear 32b, and sub-rollers 33a, 33b. In FIG. 16 , illustration of the motor 35 and the sub-rollers 33a, 33b is omitted.

The guide rollers 31 a and 31 b are arranged at both ends in the rail longitudinal direction of the main body upper portion 21 of the upper rail 220 , respectively. The lower ends of the guide rollers 31a, 31b are in contact with the upper surface of the belt 40 . In FIG. 19, when the upper guide rail 220 moves to the left side of the figure, the belt passing the guide roller 31a in the advancing direction is pulled up from the opening W of the lower guide rail 210, and is hung on the inside of the main body upper part 21 by the belt of the driving gear 32a. upper surface. The teeth 41 of the belt 40 are engaged with the drive gear 32a. When the driving gear 32 a is rotated by the motor 35 , its power is transmitted to the lower surface of the belt 40 . Since both ends of the belt 40 are fixed to the lower rail 210 , the upper rail 220 is moved by the power of the motor 35 . That is, the upper rail 220 (seat) moves electrically.

The belt 40 passing between the drive gear 32a and the sub roller 33a passes between the driven gear 32b and the sub roller 33b. The belt 40 passes under the guide roller 31 b on the rear side in the traveling direction of the upper rail 220 and returns to the opening W again.

In the seat slide device 2 j , since the opening W of the lower rail 210 is blocked by the belt 40 , dust is less likely to enter the inside of the lower rail 210 . In addition, since the opening W of the lower rail 210 cannot be seen, the appearance is good. Furthermore, since the teeth 41 for transmitting power are provided on the lower surface of the belt 40 , dust is less likely to adhere to the teeth 41 . When the upper rail 220 moves, the belt 40 blocking the opening W is pulled up from the opening W, passes through the inside of the main body upper part 21 of the upper rail 220, and returns to the opening W again in the rear side of the traveling direction. The belt 40 blocks the opening W of the lower rail 210 so as not to hinder the movement of the upper rail 220 .

(Twelfth Embodiment) A seat slide device 2k according to a twelfth embodiment will be described with reference to FIG. 20 . Fig. 20 is a cross-sectional view of the seat slide device 2k cut along the XZ plane of the coordinate system in the figure. Also in FIG. 20 , the illustration of the locking mechanism for fixing the upper rail 220 to the lower rail 210 is omitted.

In the seat slide device 2 k , the driven gear 36 engaged with the belt 40 is supported by the cam 37 . One end of the cam 37 is rotatably supported on the main body upper portion 21 of the upper rail 220 , and the driven gear 36 is mounted on the other end. The driven gear 36 is supported by a cam 37 to swing up and down. On the cam 37, a spring 38 is mounted. One end of the spring 38 is fixed to the cam 37 , and the other end is fixed to the main body upper part 21 above the cam 37 . The cam 37 (that is, the driven gear 36 ) is urged upward by a spring 38 . Since the belt 40 is wound around the upper side of the driven gear 36 , tension is applied to the belt 40 in the longitudinal direction by the biasing force of the spring 38 . By applying tension in the longitudinal direction to the belt 40 , loosening of the belt 40 blocking the opening W is prevented. The seat slide device 2k of the twelfth embodiment has the same configuration as the seat slide device 2j of the eleventh embodiment except that the driven gear 36, the cam 37, and the spring 38 are provided. The driven gear 36 , the cam 37 , and the spring 38 are mechanisms for applying tension in the longitudinal direction to the belt 40 .

(Thirteenth Embodiment) A seat sliding device 21 of a fifth embodiment will be described with reference to FIG. 21 . FIG. 21 is a cross-sectional view of the seat slide device 21 cut in front of the upper rail 320. As shown in FIG. That is, the cross section of the lower rail 310 and the front surface of the upper rail 320 are drawn in FIG. 21 . In the seat slide 21, a flat friction belt 140 is used instead of a toothed belt. The lower surface of the friction belt 140 is a power transmission surface. In FIG. 21 , to facilitate understanding, portions other than the cross section of the friction belt 140 are shown in gray.

On the other hand, on the lower rail 310 , a concave portion 9 along the longitudinal direction of the rail is provided at the connecting portion of the upper plate 5 and the inner vertical plate 6 . The friction belt 140 fits into a pair of recesses 9 located on the left and right in the width direction of the opening W. As shown in FIG. Since the friction belt 140 fits into the concave portion of the lower rail 310 , it is difficult to escape from the opening W.

The seat slide device 21 includes an actuator 330 . The actuator 330 is provided with a drive roller 52 instead of the drive gear 32a of the seat slide device 2k of the eleventh embodiment. Like the actuator 230 , the actuator 330 includes a pair of guide rollers 31 a and 31 b , a motor 35 , and a sub roller 53 . A pair of guide rollers 31a and 31b are arranged at both ends of the main body upper part 21 of the upper rail 320 in the rail longitudinal direction, respectively. The guide roller 31a is arranged at the front end of the upper body part 21, and the guide roller 31b is arranged at the rear end of the upper body part 21, although it is not visible in FIG. The lower ends of the guide rollers 31a, 31b are in contact with the upper surface of the friction belt 140 . The front guide roller 31 a is in contact with the upper surface of the friction belt 140 fitted to the lower rail 310 . When the upper guide rail 320 moves forward (the +X direction of the coordinate system in the figure), the friction belt 140 that has passed the guide roller 31a in the advancing direction is pulled up from the opening W of the lower guide rail 310, and hangs on the inside of the upper body part 21. on the upper surface of the drive roller 52 . The friction belt 140 having passed the driving roller 52 passes under the guide roller 31b at the rear end, and is fitted into the opening W again.

The friction belt 140 is sandwiched between the drive roller 52 and the sub roller 53 . The drive roller 52 is rotated by the motor 35 . When the driving roller 52 is rotated by the motor 35 , its kinetic frictional force is transmitted to the lower surface of the belt 140 . Since both ends of the friction belt 140 are fixed to the lower guide rail 310 , the upper guide rail 320 is moved by the power of the motor 35 . That is, the upper rail 320 (seat) moves electrically. In the seat slide device 2l, since the power transmission surface of the friction belt 140 is the lower surface, dust is less likely to adhere to the power transmission surface. Therefore, the frictional force between the driving roller 52 and the friction belt 140 is less likely to decrease.

Notes on techniques described in the examples will be described. The seat sliding devices 2h to 2l of the ninth to thirteenth embodiments can all prevent the adhesion of dust, which may cause a malfunction of the mechanism for moving the upper rail, with a simple structure.

The belt 40 and the friction belt 140 are made of soft resin or rubber. The belt 40 may be made of a plurality of small pieces, and adjacent small pieces may be swingably connected.

The guide rollers 31a and 31b of the embodiment correspond to an example of a pair of guides. The guides could also be pins that slide relative to the belt, instead of rollers that rotate as the belt moves.

Specific examples of the present invention have been described in detail above, but these are merely illustrations and do not limit the scope of the claims. Various modifications and changes of the specific examples illustrated above are included in the technology described in the claims. The technical elements described in this specification or the drawings exhibit technical usefulness individually or in various combinations, and are not limited to the combinations described in the claims at the time of application. In addition, the technology illustrated in this specification or the drawings can simultaneously achieve a plurality of purposes, and is technically useful in achieving one of the purposes itself.

Claims (1)

1. A seat sliding device, characterized in that it has: a lower guide rail, the lower guide rail can be installed on the vehicle body; an upper guide rail, the upper guide rail can be installed on the seat, and is movably engaged with the lower guide rail; rollers mounted to the upper rail and pressed against the lower rail or the vehicle body; and an actuator that rotates the roller, The lower rail has: floor; A pair of side plates, the pair of side plates extending upward from both ends in the short side direction of the lower guide rail of the bottom plate; an upper plate extending from an upper end of each of the side plates toward a center side in a short side direction of the lower rail; and an inner plate extending downward from the center-side end of each upper plate, The upper rail is provided with a pair of the rollers abutting on a connecting corner between each of the upper plates and the inner plate connected to the upper plate, The respective diameters of the pair of rollers gradually increase toward the center side.

Images