JP5305352B2 - Vehicle seat with sliding device - Google Patents

Description

  The present invention relates to a vehicle seat mounted on a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, there is known a vehicle seat having a seat back that is attached to a seat cushion so as to be tiltable, and a slide device for attaching the seat cushion to a floor so as to be slidable back and forth (see Patent Document 1). The seat can be slid relative to the floor by unlocking the slide device when the seat back is tilted from the use position where the seat back is tilted backward to the seat cushion to the forward tilt position of a predetermined forward tilt angle. And a slide amount restricting mechanism for restricting the rearward sliding of the seat cushion at a predetermined position when the seat back is positioned at the forward tilt position.

  The slide amount regulating mechanism is mounted on a stopper plate that is supported so as to be movable up and down by a guide provided on the seat cushion side, a pin that lifts the stopper plate by setting the seat back to the use position, and a lower rail of the slide device. Has a stopper. The stopper plate has an arcuate arc surface at the front lower edge and a vertical surface at the rear edge. When the seat cushion slides forward with the seat back in the forward tilt position, the arc surface of the stopper plate hits the stopper, and the stopper plate moves upward. This allows the seat cushion to slide forward.

  When the seat cushion slides rearward with the seat back in the forward tilted position and the vertical surface of the stopper plate hits the stopper, the rearward sliding of the seat cushion is restricted. When the seat back is pushed rearward in this state, the seat back tilts from the forward tilt position to the use position, and the slide device is locked. Thus, the rearward sliding of the seat cushion is restricted at a predetermined position, and the seating on the user seated on the seat behind the seating can be suppressed.

JP 2003-2092 A

  However, there is a desire to further improve the operability of the seat. Then, this invention makes it a subject to provide the vehicle seat which can be excellent in operativity.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat having a configuration as described in each claim. According to the first aspect of the present invention, the slide amount regulating mechanism has a first link rotatably attached to the seat cushion side and a second link rotatably attached to the first link. Between the first link and the second link, a rotation restricting portion that restricts the rotation of the second link with respect to the first link is provided. When the seat back is tilted from the use position to the forward tilt position, the first link rotates from the retracted position to the operating position together with the second link. The second link rotates relative to the first link when the second link hits a stopper provided on the floor surface side from behind. When the second link hits from the front of the stopper, the rotation of the second link is restricted by the rotation restricting portion and the first link. As the seat back tilts from the forward tilt position to the use position, the first link rotates to the retracted position and the second link moves forward relative to the stopper.

  Therefore, the first link and the second link are rotatably attached to the seat cushion side. Therefore, compared with the conventional stopper plate etc. which are hold | maintained so that sliding is possible, a 1st link etc. can be easily attached to the seat cushion side. The second link allows the seat cushion to slide forward by rotating relative to the first link when it hits the stopper from behind. On the other hand, in the conventional stopper plate, the arc surface hits the stopper and moves upward along the guide by the upper force disassembled by the arc surface. However, since the stopper plate is pressed against the guide by the remaining force, it is difficult for the stopper plate to move upward with respect to the guide due to the frictional force generated between the stopper plate and the guide. On the other hand, since the second link of the present invention tilts with respect to the stopper, it is less likely to move due to friction. Therefore, the seat cushion can be slid forward with a small force.

  Further, the second link rotates forward with respect to the stopper together with the first link interlocked with the tilting of the seat back after hitting the stopper from the front. On the other hand, in the conventional stopper plate, after the vertical surface hits the stopper, the stopper plate moves upward while sliding on the stopper in conjunction with the tilting of the seat back. Therefore, the stopper plate is difficult to move upward due to friction generated between the stopper plate and the stopper plate. On the other hand, since the second link of the present invention tilts forward at the front position of the stopper, it is less likely to move due to friction. Therefore, the second link can be retracted with respect to the stopper with a small force.

It is a left view of the vehicle seat when the seat back is in the use position. It is a left view of the vehicle seat when the seat back is in the forward tilt position. FIG. 3 is a left side view of a vehicle seat when the seat cushion is slid forward from the position of FIG. 2. FIG. 4 is a left side view of the vehicle seat when the seat cushion slides forward from the position of FIG. 3. FIG. 5 is a left side view of the vehicle seat when the seat cushion slides backward from the position of FIG. 4. FIG. 6 is a left side view of the vehicle seat when the seatback is tilted from the forward tilt position to the use position in the state of FIG. 5. It is a left view of the slide amount control mechanism when the first link is in the retracted position. It is a left view of the slide amount control mechanism when the first link is in the operating position. FIG. 8 is a cross-sectional view taken along line IX-IX in FIG. 7. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1. It is the XI-XI sectional view taken on the line of FIG.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the seat 1 is a seat that is mounted on a vehicle such as a vehicle, and is mounted as a second row seat of a vehicle including, for example, three rows of seats. The seat 1 includes a seat cushion 2, a seat back 3, and a slide device 4. The seat cushion 2 and the seat back 3 have frames 2 a and 3 a, and the frames 2 a and 3 a are connected by a reclining device 10 so that the angle can be adjusted.

  1 and 10, the slide device 4 includes a lower rail 4a attached to the vehicle floor 20, an upper rail 4b slidably mounted on the lower rail 4a, and a lock mechanism that locks the lower rail 4a and the upper rail 4b so that they cannot slide. 4c. The seat cushion 2 is attached to the upper rail 4b.

  As shown in FIGS. 10 and 11, the lock mechanism 4c has a lock member 14 attached to the upper rail 4b so as to be rotatable in the left-right direction. A force receiving portion 14 a that can be pushed by the cam 13 of the lock release mechanism 18 is formed on the upper portion of the lock member 14. A plurality of claws 14b that can penetrate through the through-holes 4a1 and 4b1 of the lower rail 4a and the upper rail 4b are formed in the lower portion of the lock member 14. The lock member 14 is pushed by the cam 13 and rotates counterclockwise against the biasing member 15, and the claw 14 b comes out of the through holes 4 a 1 and 4 b 1. As a result, the upper rail 4b can slide with respect to the lower rail 4a (unlocked state).

  The seat back 3 has a use position 1a (see FIG. 1) adjusted to a desired backward tilt angle with respect to the seat cushion 2, a forward tilt position (see FIG. 2) positioned at a predetermined forward tilt angle, and a seat. It is tilted between a folding position (not shown) that is tilted onto the cushion 2. The seat back 3 in the forward inclined position (walk-in position) is positioned at an angle of 15 to 60 ° forward of the vertical line, for example, by a positioning mechanism 1d provided between the seat back 3 and the seat cushion 2. Therefore, the user can easily enter and exit the sheets arranged in the rear row of the sheet 1.

  As shown in FIGS. 1 and 2, an operation lever 11 that is operated to move the seat back 3 from the use position 1 a to the forward tilt position 1 b is tiltably provided on the upper portion of the seat back 3. The operation lever 11 is connected to the reclining device 10 by a wire (not shown), and the reclining device 10 is unlocked by lifting the front end portion of the operation lever 11. The seat back 3 is tilted to the forward tilt position 1b by a spring 16 that urges the seat back 3 forward, or by being assisted by the spring 16.

  As shown in FIGS. 1 and 2, the seat 1 further includes a slide amount regulating mechanism 5 and a connecting device 6. The slide amount restricting mechanism 5 restricts the amount of rearward sliding of the seat cushion 2 to a predetermined position when the seat back 3 is in the forward tilt position and the slide device 4 is in the unlocked state. The coupling device 6 operates the slide amount regulating mechanism 5 in conjunction with the tilting of the seat back 3.

  As shown in FIGS. 1 and 2, the coupling device 6 includes a rotating member 6 a attached to the seat cushion 2 and a force applying body 6 b provided on the frame 3 a of the seat back 3. The center of the rotating member 6a is rotatably attached to the frame 2a by a pin 6a1. A force receiving portion 6a2 that can be pushed by the force applying body 6b is formed at one end of the rotating member 6a, and a connecting portion 6a3 to which the inner cable 12b of the cable 12 is connected is formed at the other end. Yes. The inner cable 12b is inserted through the outer cable 12a, and both ends of the outer cable 12a are attached to the frame 2a. The force imparting body 6b pushes and rotates the rotating member 6a by tilting the seat back 3 from the use position 1a to the forward tilt position 1b. The rotating member 6a pulls the inner cable 12b by rotating.

  As shown in FIGS. 7 and 9, the slide amount regulating mechanism 5 includes a first link 7 that is rotatably attached to the upper rail 4 b and a second link 8 that is rotatably attached to the first link 7. The center of the first link 7 is rotatably attached to the upper rail 4b by a first pin 7a. The first link 7 has a connecting piece 7b extending downward and a mounting piece 7c extending forward. The inner cable 12b is connected to the end of the connecting piece 7b. A second pin 7d is attached to the attachment piece 7c, and the second link 8 is rotatably attached to the second pin 7d.

  As shown in FIGS. 7 and 9, a first spring 5c that urges the first link 7 clockwise with respect to the upper rail 4b is attached to the first pin 7a. The center end of the first spring 5c is locked to the first pin 7a, and the outer end is locked to a locking pin 5a provided on the upper rail 4b. The first link 7 is positioned by being urged by the first spring 5c and the connecting piece 7b hitting a stopper 5b provided on the upper rail 4b. A second spring 5d that urges the second link 8 clockwise is attached to the second pin 7d. One end portion of the second spring 5 d is locked at the center end portion to the second pin 7 d and the outer end portion is locked at the end edge of the second link 8.

  As shown in FIGS. 7 and 9, the second link 8 has an extending portion 8a extending from the second pin 7d and a rotation restricting portion 8b formed at the upper edge. The rotation restricting portion 8 b stands at the upper end edge of the second link 8 and protrudes from the upper end edge of the first link 7. Accordingly, the second link 8 is restricted from rotating counterclockwise with respect to the first link 7 by the rotation restricting portion 8b. The extending portion 8a extends in a curved shape from the second pin 7d in the front lower direction. The distal end of the extension 8a is positioned above the stopper 9 when the first link 7 is at the retracted position shown in FIG. 7, and below the stopper 9 when the first link 7 is at the operating position shown in FIG. Located in.

  As shown in FIGS. 7 and 10, the first link 7 is non-rotatably attached to one end of the first pin 7a, and the cam 13 of the lock release mechanism 18 is non-rotatably attached to the other end of the first pin 7a. Yes. Accordingly, when the first link 7 is pulled by the inner cable 12b, the first pin 7a and the cam 13 rotate simultaneously.

  By operating the operating lever 11 as shown in FIGS. 1 and 2, the reclining device 10 is unlocked, and the seat back 3 can be tilted with respect to the seat cushion 2. When the seat back 3 tilts from the use position 1a to the forward tilt position 1b, the force applying body 6b pushes the rotating member 6a, and the rotating member 6a rotates to pull the inner cable 12b. As shown in FIGS. 7 and 8, the inner cable 12b causes the first link 7 to rotate against the first spring 5c and move from the retracted position of FIG. 7 to the operating position of FIG.

  When the first link 7 rotates as shown in FIGS. 10 and 11, the cam 13 rotates together with the first pin 7a. As a result, the lock member 14 is detached from the upper rail 4b and the lower rail 4a, and the lock mechanism 4c is unlocked. Therefore, the upper rail 4b can slide with respect to the lower rail 4a. As shown in FIGS. 2 and 3, when the seat cushion 2 slides forward together with the upper rail 4b, the second link 8 hits the stopper 9 from the rear. The second link 8 rotates counterclockwise with respect to the first link 7 against the second spring 5 d, and the tip of the second link 8 slides on the upper surface of the stopper 9.

  When the tip of the second link 8 moves forward from the stopper 9 as shown in FIG. 4, the second link 8 is rotated to the original position with respect to the first link 7 by the second spring 5d. Thereby, the front-end | tip part of the 2nd link 8 protrudes below the stopper 9 again. As shown in FIG. 5, when the seat cushion 2 slides rearward with the seat back 3 in the forward tilt position 1b, the tip of the second link 8 hits the stopper 9 from the front. The rotation of the second link 8 is restricted with respect to the first link 7 by the rotation restricting portion 8b (see FIG. 8), and the rotation of the first link 7 is restricted by being pulled by the inner cable 12b. Therefore, the second link 8 is rotationally restricted by the rotation restricting portion 8b and the first link 7, and restricts the rearward sliding of the seat cushion 2.

  When the seat back 3 is further pushed rearward, as shown in FIG. 6, the rearward sliding of the seat cushion 2 is restricted, so that the seat back 3 rotates rearward with respect to the seat cushion 2. As a result, the force applying body 6b rotates, the force applying body 6b is detached from the force receiving portion 6a2 of the rotating member 6a, and the pulling force of the inner cable 12b by the rotating member 6a is released. As a result, the first link 7 is biased by the first spring 5d and rotates from the operating position to the retracted position. As a result, the second link 8 moves forward and upward with respect to the stopper 9 together with the first link 7.

  When the first link 7 rotates from the operating position to the retracted position, as shown in FIGS. 10 and 11, the cam 13 rotates and the lock member 14 is urged by the spring 15 to rotate. As a result, the claw 14b is engaged with the lower rail 4a and the upper rail 4b, and the seat back 3 is locked against the floor 20 by the lock mechanism 4c so as not to slide.

  A reclining release lever (not shown) is provided on the side portion of the seat 1 so as to be tiltable. When the reclining release lever is tilted, the reclining device 10 is released and the seat back 3 can be adjusted to a predetermined backward tilt angle. Alternatively, the seat back 3 can be overlaid on the seat cushion 2. When the seat back 3 is stacked on the seat cushion 2, the force applying body 6b moves rearward from the force receiving portion 6a2 of the rotating member 6a. Thereby, the rotating member 6a does not pull the inner cable 12b, and the first link 7 is located at the retracted position. Then, the slide device 4 is locked.

  As described above, the slide amount regulating mechanism 5 has the first link 7 and the second link 8 as shown in FIG. Therefore, the first link 7 and the second link 8 are rotatably attached to the seat cushion side (upper rail 4b). Therefore, the first link 7 or the like can be easily attached to the seat cushion 2 side as compared with a conventional stopper plate or the like that is slidably held. Further, the second link 8 rotates with respect to the first link 7 when it hits the stopper 9 from behind, thereby allowing the seat cushion 2 to slide forward. On the other hand, in the conventional stopper plate, the arc surface hits the stopper and moves upward along the guide by the upper force disassembled by the arc surface. However, since the stopper plate is pressed against the guide by the remaining force, it is difficult for the stopper plate to move upward with respect to the guide due to the frictional force generated between the stopper plate and the guide. On the other hand, since the second link 8 tilts with respect to the stopper 9, there is little possibility that it becomes difficult to move due to friction. Therefore, the seat cushion 2 can be slid forward with a small force.

  The second link 8 rotates forward with respect to the stopper 9 together with the first link 7 interlocked with the tilting of the seat back 3 after hitting the stopper 9 from the front. On the other hand, in the conventional stopper plate, after the vertical surface hits the stopper, the stopper plate moves upward while sliding on the stopper in conjunction with the tilting of the seat back. Therefore, the stopper plate is difficult to move upward due to friction generated between the stopper plate and the stopper plate. On the other hand, since the second link 8 tilts forward at the front side position of the stopper 9, it is less likely to move due to friction. Therefore, the second link 8 can be retracted with respect to the stopper 9 with a small force.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) The lock mechanism 4c shown in FIGS. 1 and 10 is a lock release having a coupling device 6 that pulls the inner cable 12b in conjunction with the seat back 3, and a cam 13 that rotates together with the first link 7 that rotates by the inner cable 12b. The lock is released by the mechanism 18. However, the lock mechanism may be unlocked by a lock release mechanism having a cam that rotates in conjunction with the tilt of the seat back by a member different from the slide amount regulating mechanism 5.
(2) The first link 7 shown in FIG. 7 tilts in the vertical direction, and the second link 8 can hit the stopper 9 positioned below the first link 7. However, the structure may be such that the first link tilts in the left-right direction and the second link can hit the stopper located at the left-right adjacent position of the first link.
(3) The rotation restricting portion 8 b shown in FIG. 7 projects from the second link 8 to the first link 7. However, the rotation restricting unit may project from the first link to the second link to restrict the rotation of the second link relative to the first link.
(4) The first link 7 shown in FIG. 7 is rotatably attached to the upper rail 4b. However, the first link may be rotatably attached to the frame or the like of the seat cushion.
(5) Although the above embodiment is a seat mounted on a vehicle, it may be a seat mounted on a vehicle or the like that does not have wheels.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 1a ... Use position 1b ... Forward tilt position 2 ... Seat cushion 3 ... Seat back 4 ... Slide device 4c ... Lock mechanism 5 ... Slide amount control mechanism 6 ... Connection device 7 ... First link 8 ... Second link 8b ... Rotation restricting part 9 ... Stopper 10 ... Reclining device 11 ... Operation lever 13 ... Cam 17 ... Reclining release lever 18 ... Lock release mechanism 20 ... Vehicle floor

Claims (1)

A vehicle seat with a slide device having a seat back tiltably attached to a seat cushion and a slide device for slidably attaching the seat cushion back and forth on a floor surface,
When the seat back tilts from a use position tilted backward with respect to the seat cushion to a forward tilt position with a predetermined forward tilt angle, the seat device can be unlocked and the seat cushion can slide with respect to the floor An unlocking mechanism to be configured, and a slide amount regulating mechanism that regulates sliding of the seat cushion to the rear at a predetermined position when the seat back is located at the forward tilt position,
The slide amount regulating mechanism has a first link rotatably attached to the seat cushion side and a second link rotatably attached to the first link, and is between the first link and the second link. A rotation restricting portion for restricting the rotation of the second link with respect to the first link;
When the seat back is tilted from the use position to the forward tilt position, the first link rotates together with the second link from the retracted position to the operating position, and the second link is provided on the floor surface side. The second link rotates with respect to the first link when it hits from behind, and the second link by the rotation restricting portion and the first link when the second link hits from the front of the stopper The rotation of the seat back is restricted, and the first link rotates to the retracted position as the seat back tilts from the forward tilt position to the use position, and the second link moves forward relative to the stopper. A vehicle seat with a slide device.

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