JP4597781B2 - Sheet - Google Patents

Description

  The present invention relates to a seat having a link mechanism and capable of moving up and down.

An example of a seat in which a seat cushion descends to the vicinity of a floor among seats provided in a vehicle is one that uses a mechanism including four links (see, for example, Patent Document 1).
Such a seat has a lock mechanism that permits / prohibits rotation of links other than the fixed link, and when the lock mechanism is unlocked, the seat can be raised and lowered.
JP 2004-224094 A (FIGS. 2 and 4)

  However, a sheet having such a link mechanism has an advantage that the mechanism is simple. However, when the lock mechanism is unlocked, it is lowered to its lowest position by its own weight. In the case where the seat having such a structure is a driver's seat and further has a seat track mechanism that can move in the front-rear direction, when the lock mechanism is released during operation, the seat is lowered to the lowest position all at once. Therefore, the driving posture changes, and driving is inconvenient.

The present invention has been made in view of the above problems, and a first object thereof is to provide a seat that can be raised and lowered only when the seat is at the last position of the seat track mechanism.
A second problem is to provide a seat in which, when the seat is lowered, the forward movement of the upper rail of the seat track mechanism is prohibited.

  The invention according to claim 1, which solves the above-mentioned problem, has a seat track mechanism comprising a lower rail provided on the floor side, an upper rail movably engaged with the lower rail, and a lower portion rotatable to the front portion of the upper rail. A front link that is attached and has an upper part rotatably attached to the front part of the seat cushion, a lower link that is rotatably attached to the rear part of the upper rail, and an upper part that is rotatably attached to the rear part of the seat cushion. And a lift lock mechanism that prohibits rotation of at least one of the front link and the rear link and prohibits the lift of the seat cushion, and the lift lock unless the upper rail is moved to the last position of the lower rail. A cancel mechanism that prevents the mechanism from being unlocked, and When unlock the locking mechanism to lower the seat cushion to the lowest position, a sheet characterized by having a stopper mechanism for prohibiting forward movement of the upper rail.

When the upper rail is at a position other than the last position with respect to the lower rail, the cancel mechanism is operating, so the locking mechanism is not operated and the seat cannot be raised or lowered.
When the upper rail moves to the last position with respect to the lower rail, the cancel mechanism is released. When the lock mechanism is released, the seat can be raised and lowered.

When the seat is lowered, the stopper mechanism is actuated to prohibit the upper rail from moving forward.
According to a second aspect of the present invention, a plurality of engaged portions provided on the lower rail along the moving direction of the upper rail, and provided on the upper rail side and engaged with the engaged portions, A seat slide lock mechanism including an engaging portion that prohibits the movement of the upper rail, and an urging unit that urges the engaging portion in a direction in which the engaging portion engages with the engaged portion; A stopper that is rotatably provided on the upper rail side and prohibits movement of the engaging portion in a state of being engaged with the engaged portion when the seat cushion is lowered to a substantially lowest position. The sheet according to claim 1.

  When the seat is lowered to a substantially lowest position, the stopper prohibits the movement of the engaging portion in a state where the stopper is engaged with the engaged portion of the seat slide lock mechanism, and the sliding of the seat is prohibited. That is, the forward movement of the upper rail is prohibited.

  According to a third aspect of the present invention, the stopper mechanism is provided in the first stopper member provided in the lower rail and the seat cushion, and when the seat cushion is lowered to a substantially lowest position, the first stopper member is provided in the first stopper. 2. The seat according to claim 1, further comprising a second stopper member that is capable of abutting and prohibits forward movement of the upper rail by abutting.

  If the upper rail is moved forward in a state where the seat cushion is lowered to the substantially lowest position, the second stopper member comes into contact with the first stopper member and the movement of the upper rail is prohibited.

  According to a fourth aspect of the present invention, the elevating lock mechanism has a lock pin provided in the seat cushion, a long hole into which the lock pin is fitted, and an end portion of the rear link on the seat cushion side of the rotation center. A long link that is rotatably attached to the upper portion and moves within a range in which the lock pin abuts against an end of the elongated hole by the movement of the rear link, and is provided rotatably on the long link, A hook that engages with the lock pin in a state where the pin is in contact with one end of the elongated hole and a state in which the pin is in contact with the other end, and prohibits movement of the long link, and the hook is the lock pin 4. The seat according to claim 1, further comprising hook urging means for urging the hook in a direction in which the hook is engaged.

When the lock pin is in contact with one end of the long link slot, the seat is in the highest position, and when the lock pin is in contact with the other end of the long link slot, the seat is in the lowest position. is there.

  When the lock pin is in contact with one end of the long hole of the long link and the hook is engaged with the lock pin, the seat is locked at the highest position and the lowering is prohibited. When the hook is engaged with the lock pin in a state where the lock pin is in contact with the other end of the long hole of the long link, the seat is locked at the lowest position and the ascent is prohibited.

When the hook engaged with the lock pin is released from the lock pin against the urging force of the hook urging means, the seat can be lowered or raised.
According to a fifth aspect of the invention, the cancel mechanism is rotatably provided on the frame, has an arm portion extending in a radial direction, and drives the hook of the lock mechanism by rotating in one direction. A lever, a hook drive lever biasing means for biasing the hook drive lever in the direction of rotation in the other direction, and a hook drive for prohibiting movement of the hook drive lever biased by the hook drive lever biasing means A lever stopper, an operation lever provided rotatably around the rotation center axis of the hook drive lever, and having an elongated hole extending further from the tip of the arm portion of the hook drive lever in the radial direction, and the elongated hole A cancel pin that is movably engaged and can contact a side surface of the arm portion of the hook drive lever, and the cancel pin is an arm portion of the hook drive lever An operation lever urging means for urging the operation lever in a direction away from the operation lever, an operation lever stopper for inhibiting the movement of the operation lever urged by the operation lever urging means, and rotating in the vicinity of the hook drive lever The cancel pin can be brought into contact with the side surface of the arm portion of the hook drive lever and the side surface of the arm portion of the hook drive lever. A first cancel lever having a guide hole that moves along a long hole of the operation lever between the position and the position where the cancel pin does not move, and the position where the cancel pin does not contact the side surface of the arm portion of the hook drive lever. A first cancel lever urging means for urging the first cancel lever, and the upper rail is rotatably provided; A second cancel lever that rotates the first cancel lever; a cancel member that is provided on the lower rail side and contacts the second cancel lever when the upper rail is retracted to the vicinity of the last position; and the second cancel lever is the cancel member And a second cancel lever biasing means for biasing the second cancel lever in a direction in which the second cancel lever comes into contact with the second cancel stopper. The sheet according to claim 1, wherein the sheet is a sheet.

  When the upper rail is at a position other than the last position with respect to the lower rail, the second cancel lever of the upper rail is not in contact with the cancel member on the lower rail side, so the second cancel lever is biased by the biasing force of the second cancel lever biasing means. It is in contact with the stopper. On the other hand, the first cancel lever moves the cancel pin by the biasing force of the first cancel lever biasing means so that the cancel pin is not in contact with the side surface of the arm portion of the hook drive lever.

  Therefore, even if the operation lever is rotated against the urging force of the operation lever urging means in this state, the cancel pin is in a position where it does not come into contact with the hook drive lever. Therefore, the hook drive lever that drives the hook of the lock mechanism Does not rotate and the locking mechanism is not driven.

  When the upper rail moves to the last position with respect to the lower rail, the second cancel lever of the upper rail is pressed against the cancel member on the lower rail side and rotates against the urging force of the second cancel lever urging means. By the rotation of the second cancel lever, the first cancel lever rotates against the urging force of the first cancel lever urging means so that the cancel pin comes into contact with the side surface of the arm portion of the hook drive lever. Move the cancel pin to.

  When the operation lever is rotated against the urging force of the operation lever urging means in this state, since the cancel pin is in a position to contact the hook drive lever, the hook drive lever that drives the hook of the lock mechanism rotates, The locking mechanism is driven.

The invention according to claim 6 is the seat according to claim 5, wherein the hook driving lever drives the stopper of the stopper mechanism.
When the upper rail moves to the last position with respect to the lower rail, the operation lever is rotated, and the hook drive lever is rotated, the stopper of the stopper mechanism is driven.

  According to the first to fifth aspects of the invention, the seat has a cancel mechanism that prevents the lock mechanism from operating unless the upper rail is moved to the last position with respect to the lower rail. It is possible to move up and down only at the last position.

  For example, when used in the driver's seat, the seat can be raised and lowered only at the last position of the seat track mechanism where the steering wheel cannot be operated, so the seat descends to the lowest position during driving, and the driving posture changes. Inconvenience in driving can be prevented.

  Also, when the seat cushion is lowered to the lowest position by unlocking the lift lock mechanism, the seat track mechanism has a stopper mechanism that prohibits the forward movement of the upper rail. The forward movement of the upper rail can be prohibited.

  Therefore, when the upper rail is moved to the last position and the seat cushion is lowered to the lowest position, even if a large impact force is applied to the vehicle due to a collision or the like, the upper rail of the seat track mechanism does not move forward.

  According to a second aspect of the present invention, the seat slide lock mechanism is provided on the lower rail, on a plurality of engaged portions provided along the movement direction of the upper rail, on the upper rail side, and on the engaged surface. An engaging portion that inhibits the movement of the upper rail by engaging with a joint portion; and an urging means that urges the engaging portion in a direction to engage the engaged portion, and the stopper The mechanism is provided rotatably on the upper rail side, and has a stopper that prohibits movement of the engaging portion engaged with the engaged portion when the seat cushion is lowered to a substantially lowest position. When the seat is lowered to the lowest position, the forward movement of the upper rail of the seat track mechanism can be prohibited.

  According to a third aspect of the present invention, the stopper mechanism is provided on the lower cushion and the first stopper member provided on the lower rail, and when the seat cushion is lowered to a substantially lowest position, the first stopper member is provided on the lower rail. When the seat is lowered to the lowest position by the second stopper member that can come into contact with the stopper and prohibits the forward movement of the upper rail by the contact, the forward movement of the upper rail of the seat track mechanism Can be prohibited.

  According to the fourth aspect of the present invention, with one hook, the lock pin is engaged with the lock pin in a state in which the lock pin is in contact with one end of the elongated hole and in a state in which the lock pin is in contact with the other end. The movement of the link is prohibited, that is, the lifting and lowering of the seat can be prohibited with one hook in two states, ie, the state where the seat is at the highest position and the state where it is at the lowest position, and the mechanism is simplified.

<First Embodiment>
The overall configuration of the sheet according to the first embodiment will be described with reference to FIGS. 1 is a configuration diagram illustrating a state where the seat is at the highest position, FIG. 2 is a configuration diagram illustrating a state where the seat is at the lowest position, FIG. 3 is a rear view of FIG. 1, FIG. 4 is a rear view of FIG. FIG. 2 is a cross-sectional view taken along a cutting line NN in FIG. 1 to 4, the seat track mechanism 51 includes a lower rail 53 disposed on the floor side and an upper rail 55 that is movably engaged with the lower rail 53.

  As shown in FIGS. 1 and 2, an upper portion of a front link 71 is rotatably attached to a front portion of a seat cushion frame 61 using a pin 73. A rod 83 is disposed at the rear portion of the frame 61 so as to bridge the frames 61 on both sides of the seat cushion. As shown in FIG. 9, the pin 10 is press-fitted into the end surface of the rod 83, and both are integrated. The pin 10 is rotatably fitted in a through hole 61a formed by a burring method at the rear part of the frame 61, and the rod 83 is rotatably supported by the frame 61 on both sides of the seat cushion via the pin 10. ing. The upper part of the rear link 81 is fixed to the rod 83.

  1 and 2, the lower portion of the front link 71 is rotatably attached to the front portion of the upper rail 55 using a pin 75. A bracket 80 is attached to the rear portion of the upper rail 55, and a lower portion of the rear link 81 is rotatably attached to the bracket 80 (rear portion of the upper rail 55) using a pin 85.

  Accordingly, the upper rail 55, the front link 71, the frame 61, and the rear link 81 form a four-bar rotation chain in which the upper rail 55 is fixed, and the front link 71 and the rear link 81 rotate with respect to the upper rail 55. As a result, the frame 61 (seat) can be raised and lowered with respect to the upper rail 55 (floor) of the seat track mechanism 51.

  In this embodiment, a damper 86 is provided in the vicinity of the pin 85 so as to give a resistance force to the rotation of the rear link 81. Further, the rear link is moved in a direction in which the frame 61 is raised by an urging means (not shown). It is energized.

  The rear portion of the frame 61 is provided with a lift lock mechanism 100 that prohibits the rotation of the rear link 81 and prohibits the seat cushion (frame 61) from being lifted and lowered. A cancel mechanism 200 is provided to prevent the lifting lock mechanism 100 from operating unless the upper rail 55 is moved to the last position with respect to the lower rail 53. The upper rail 55 and the lower rail 53 are provided with a seat slide lock mechanism 300 that prohibits the movement of the upper rail 55. Further, the upper rail 55 is provided with a stopper mechanism 400 that prohibits the upper rail 55 from moving forward when the lift lock mechanism 100 is unlocked and the seat cushion (frame 61) is lowered to the lowest position.

  Here, the seat slide lock mechanism 300 will be described with reference to FIGS. FIG. 5 is a perspective view illustrating the seat slide lock mechanism 300 of FIG. 1, and FIG. 6 is a cross-sectional view taken along a cutting line MM of FIG. On the side of the lower rail 53, lock holes 303 are formed as a plurality of engaged portions provided along the moving direction of the upper rail 55. A bracket 305 is provided on the side of the upper rail 55. The bracket 305 supports a substantially L-shaped operation lever 307 in a rotatable manner. Further, a lock lever 313 as an engaging portion formed with lock teeth 311 that can be engaged and disengaged in the lock hole 303 of the lower rail 53 is fixed to the operation lever 307. The lock teeth 311 of the lock lever 313 are engaged with the lock holes 303 of the lower rail 53 by a spring 315 as an urging means whose one end is locked to the operation lever 307 and the other end is locked to the bracket 305. The operation lever 307 is urged in the direction to move.

Further, in this embodiment, a stopper bracket 317 extending in the direction of the rear link 81 is attached to the back surface of the lock lever 313.
Further, as shown in FIG. 6, the seat track mechanism 51 includes an upper rail 55, a lower rail 53, two balls 56 provided inside the lower rail 53, and one roller 58.

Next, the lift lock mechanism 100 will be described with reference to FIGS. 1, 2, and 9.
As shown in FIG. 9, the lower portion of the connecting link 90 arranged along the portion further above the rod 83 that is the center of rotation of the rear link 81 on the frame 61 side is fixed to the rod 83. A pin 103 is attached between a portion further above the rod 83 which is the center of rotation of the rear link 81 on the frame 61 side and an upper portion of the connecting link 90. The pin 103 is fixed to a portion further above the rod 83 which is the center of rotation of the rear link 81 on the frame 61 side by a method such as welding, and is fixed to an upper portion of the connecting link 90 by a method such as caulking. Has been. And the long link 105 of the raising / lowering lock mechanism 100 is attached to this pin 103 rotatably.

  As shown in FIGS. 1 and 2, the frame 61 is provided with a lock pin 101. The long link 105 has a long hole 107 into which the lock pin 101 is fitted. Accordingly, the long link 105 moves within a range in which the lock pin 101 contacts the end of the elongated hole 107, and the long link 105 is in a state where the lock pin 101 contacts one end of the elongated hole 107 (the state shown in FIG. 1). When the sheet 105 is moved, the sheet is at the highest position, and when the long link 105 is moved to a state where the lock pin 101 is in contact with the other end of the long hole 107 (the state shown in FIG. 2), the sheet is at the lowest position. It has become.

  A hook 113 is rotatably attached to the long link 105 using a pin 111. The hook 113 is engaged with the lock pin 101 in a state in which the lock pin 101 is in contact with one end of the elongated hole (state in FIG. 1) and in a state in which the lock pin 101 is in contact with the other end (state in FIG. 2). The movement of the long link 105 is prohibited. The state in which the movement of the long link 105 is prohibited is a locked state in which the rotation of the rear link 81 is prohibited.

Further, the hook 113 is urged in a direction engaging with the lock pin 101 (in the direction of arrow A in FIGS. 1 and 2) by a hook urging means (not shown).
Here, the operation of the lift lock mechanism 100 will be described. When the seat is at the highest position and the lift lock mechanism 100 is in the locked state as shown in FIG. 1, when the hook 113 is rotated in the direction of the arrow A against the urging force of the hook urging means, the rear link 81 Thus, the sheet can be moved to the lowest position. When the seat is lowered to the lowest position and the force for rotating the hook 113 is released, the state shown in FIG. 2 is obtained, and the locked state in which the movement of the long link 105 is prohibited again.

  Further, when the hook 113 is rotated in the direction opposite to the arrow A against the urging force of the hook urging means in the state shown in FIG. The link 81 can be unlocked and the seat can move to the highest position. When the seat is lifted to the highest position and the force for rotating the hook 113 is released, the state shown in FIG. 1 is obtained, and the locked state in which the movement of the long link 105 is prohibited again.

Next, the stopper mechanism 400 that prohibits the forward movement of the upper rail 55 when the seat cushion (frame 61) is lowered to the lowest position will be described.
A hook-like engagement portion 81 a is formed at the lower portion of the rear link 81.

  A stopper 403 is rotatably attached to the bracket 80 attached to the rear portion of the upper rail 55 using a pin 401. A hook-like engagement portion 403 a that can be engaged with and disengaged from the engagement portion 81 a of the rear link 81 is formed on the rotation end portion side of the stopper 403. Further, when the stopper 403 rotates in the direction of the seat slide lock mechanism 300, the rotating end side enters the space between the stopper bracket 317 and the lower rail 53. A pin 405 is provided on the rotation end side of the stopper 403. The pin 405 is an upper end surface of the stopper bracket 317 attached to the lock lever 313 of the seat slide lock mechanism 300 in a locked state (a state where the lock teeth 311 of the lock lever 313 and the lock hole 303 of the lower rail 53 are engaged). 317a (see FIG. 6) can be contacted, and by the contact, movement of the lock lever 313 in the unlocking direction (the direction in which the lock teeth 311 of the lock lever 313 are detached from the lock hole 303 of the lower rail 53) is prohibited. (The stopper mechanism 400 is locked).

  The stopper 403 is urged toward the rear link 81 by an urging means (not shown), and when the seat is at the highest position, the engaging portion 403a of the stopper 403 is engaged with the engaging portion 81a of the rear link 81. It comes to match. By this engagement, when a forward impact force acts on the seat (frame 61), the rear link 81 is prohibited from rotating clockwise in FIG.

  Next, the cancellation mechanism 200 will be described with reference to FIGS. 7 is an enlarged view of the cancel mechanism, FIG. 7A is an enlarged view of the state of FIG. 1, FIG. 7B is an enlarged view of the state of FIG. 2, and FIG. 8 is a plan view showing each part of the cancel mechanism of FIG. In the figure, (a) shows a first cancel lever, (b) shows an operation lever, (c) shows a hook drive lever, and (d) shows a base.

  The cancel 200 mechanism is provided in the frame 61 and the seat track mechanism 51. A mechanism provided on the frame 61 is provided on the base 201. A hook drive lever 205 is rotatably provided on the base 201 using a pin 203. As shown in FIGS. 1 and 2, the hook drive lever 205 and the hook 113 of the lift lock mechanism 100 are cylindrical, and the ends are the base 201 of the cancel mechanism 200 and the long link 105 of the lift lock mechanism 100. The outer casing 207 is engaged with the outer casing 207, the wire 211 is inserted through the outer casing 207 so as to be movable, and the inner end 209 is engaged with the hook driving lever 205 and the hook 113. When 205 rotates in the direction (one direction) of pulling the inner wire 209, the hook 113 is also rotated. Further, between the hook drive lever 205 and the stopper 403 of the stopper mechanism 400, the end is locked to a base 201 of the cancel mechanism 200 and a bracket 411 provided on the upper rail 55 near the stopper mechanism 400. The outer casing 413 is inserted into the outer casing 413 so that the inner casing 413 is movably inserted into the outer casing 413. The wire 417 is formed of an inner wire 415 whose end is locked to the hook driving lever 205 and the stopper 403. When it is rotated in the pulling direction (one direction), the stopper 403 is rotated in the direction of the seat slide lock mechanism 300.

The hook drive lever 205 is formed with an arm portion 213 extending in the radial direction.
Furthermore, the hook drive lever urging means (not shown) urges the hook drive lever 205 in the direction rotating in the direction opposite to the direction in which the inner wire 209 is pulled (the other direction: the direction of arrow B in FIG. 7). The base 201 is formed with a stopper 215 as a hook drive lever stopper for preventing the movement of the hook drive lever 205 by abutting the bent portion 205a of the hook drive lever 205 urged by the hook drive lever urging means. Yes.

  Next, an operation lever 217 is rotatably provided on the pin 203 which is the rotation center axis of the hook drive lever 205. The operation lever 217 is formed with a long hole 219 extending further from the tip of the arm portion 213 of the hook drive lever 205 in the radial direction. A cancel pin 221 that can contact the side surface of the arm portion 213 of the hook drive lever 205 is movably engaged with the elongated hole 219. The operation lever 217 is urged in a direction (in the direction of arrow C in FIG. 7) in which the cancel pin 221 is separated from the arm portion 213 of the hook drive lever 205 by an operation lever urging means (not shown). The hook drive lever 205 is provided with a stopper 205b as an operation lever stopper that abuts the side surface of the operation lever 217 urged by the operation lever urging means and prohibits the movement of the operation lever 217.

  In the vicinity of the hook drive lever 205, a first cancel lever 233 is rotatably provided using a pin 231. The first cancel lever 233 engages with the cancel pin 221 and rotates, so that the cancel pin 221 can contact the side surface of the arm portion 213 of the hook drive lever 205, and the arm portion of the hook drive lever 205. A guide hole 235 that is moved along the elongated hole 219 of the operation lever 217 is formed between the position of the control lever 217 and the position that does not contact the side surface of 213. Also, the first cancel lever 233 (not shown) causes the first cancel lever 233 to move to the position where the cancel pin 221 is not in contact with the side surface of the arm portion 213 of the hook drive lever 205 in the direction of arrow D in FIG. Is being energized.

  Next, a mechanism provided in the seat track mechanism 51 will be described. As shown in FIGS. 3 and 4, a bracket 240 is provided on a side surface of the upper rail 55, and a second cancel lever 243 is rotatably provided on the bracket 240 using a pin 241. Further, on the side surface of the lower rail 53, there is provided a cancel member 245 with which the second cancel lever 243 comes into contact when the upper rail 55 is retracted to the vicinity of the last position. Further, the bracket 240 is formed with a second cancel lever stopper 247 that prohibits the second cancel lever 243 from rotating beyond a position where the second cancel lever 243 can contact the cancel member 245. And the 2nd cancellation lever 243 is urged | biased by the direction (arrow E direction of FIG. 3, FIG. 4) which the 2nd cancellation lever 243 contact | abuts by the 2nd cancellation lever urging means which is not shown in figure.

  Between the first cancel lever 233 and the second cancel lever 243, an outer casing 287 having a cylindrical shape and having an end locked to the base 201 and a bracket 240 provided on the upper rail 55, Is inserted movably, and a wire 291 having an inner wire 289 whose end is locked to the first cancel lever 233 and the second cancel lever 243 is provided, and the second cancel lever 243 pulls the inner wire 289 in a pulling direction. When rotated, the first cancel lever 233 is also rotated.

Here, the operation of the cancel mechanism 200 will be described.
When the upper rail 55 is at a position other than the last position with respect to the lower rail 53, the second cancel lever 243 of the upper rail 55 is not in contact with the cancel member 245 on the lower rail 53 side as shown in FIG. The second urging lever stopper 247 is in contact with the urging force of the lever urging means. On the other hand, the first cancel lever 233 moves the cancel pin 221 so that the cancel pin 221 is not in contact with the side surface of the arm portion 213 of the hook drive lever 205 by the biasing force of the first cancel lever biasing means. Yes. Therefore, even if the operation lever 217 is rotated against the urging force of the operation lever urging means in this state, the cancel pin 221 is in a position where it does not come into contact with the hook drive lever 205. The hook drive lever 205 that drives the stopper 403 of the stopper mechanism 400 does not rotate, and the elevation lock mechanism 100 and the stopper mechanism 400 are not driven.

  When the upper rail 55 moves to the last position with respect to the lower rail 53, the second cancel lever 243 of the upper rail 55 is pressed against the cancel member 245 on the lower rail side and resists the biasing force of the second cancel lever biasing means. Rotate. By the rotation of the second cancel lever 243, the first cancel lever 233 rotates against the biasing force of the first cancel lever biasing means, and the cancel pin 221 contacts the side surface of the arm portion 213 of the hook drive lever 205. The cancel pin 221 is moved so as to be in the position.

  When the operation lever 217 is rotated against the urging force of the operation lever urging means in this state, the cancel pin 221 is in a position where it abuts against the hook drive lever 205, so that the hook 113 of the lift lock mechanism 100 and the stopper mechanism 400 are located. The hook driving lever 205 for driving the stopper 403 rotates, and the elevation lock mechanism 100 is unlocked and the stopper mechanism 400 is locked.

According to such a configuration, the following effects can be obtained.
(1) By including the cancel mechanism 200 that prevents the lifting lock mechanism 100 from operating unless the upper rail 55 is moved to the last position with respect to the lower rail 53, the seat can be lifted and lowered only when the seat is at the last position of the seat track mechanism 51. It becomes possible.
(2) With one hook 113, the lock pin 101 is engaged with the lock pin 101 in a state where the lock pin 101 is in contact with one end of the elongated hole 107 and in a state where the lock pin 101 is in contact with the other end. In other words, it is possible to prohibit the lifting and lowering of the seat in two states, that is, the state where the seat is at the highest position and the state where it is at the lowest position, and the mechanism becomes simple.
(3) When the lift lock mechanism 100 is unlocked and the seat cushion (frame 61) is lowered to the lowest position, the seat is lowered to the lowest position by including the stopper mechanism 400 that prohibits the upper rail 55 from moving forward. Then, the forward movement of the upper rail 55 of the seat track mechanism 51 can be prohibited.

Therefore, when the upper rail 55 is moved to the last position and the seat cushion (frame 61) is lowered to the lowest position, even if a large impact force is applied to the vehicle due to a collision or the like, the upper rail 55 of the seat track mechanism 51 is used. Does not move forward.
(4) In the case of this embodiment, the rear link 81 and the long link 105 are offset in the vehicle width direction. Then, as shown in FIG. 9, the pin 103 is also connected to the rear link 81. If the rear link 81 is not connected to the pin 103 and a front or rear load is applied to the frame 61 due to a vehicle collision or the like, a torsional force is generated on the rod 83. Since the pin 103 is also connected to the rear link 81, no torsional force is generated in the rod 83, and the strength of the rod 83 can be reduced, resulting in a low cost.

The present invention is not limited to the above embodiment. The lifting lock mechanism 100 in the above-described embodiment prohibits the rotation of the rear link 81, but may be configured to prohibit the rotation of the front link 71, or both the rear link 81 and the front link 71 may be configured. A lock mechanism may be provided.
<Second embodiment>
This will be described with reference to FIGS. 10 is a configuration diagram showing a state where the sheet is at the highest position, FIG. 11 is a configuration diagram showing a state where the sheet is at the lowest position, FIG. 12 is a rear view of FIG. 10, and FIG. 13 is a rear view of FIG. The major difference between this embodiment and the first embodiment is a stopper mechanism, and the other parts are the same as those of the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  First, as shown in FIGS. 11 and 12, the rear link 81 does not have the engaging portion 81a in the first embodiment. The hook driving lever 205 of the cancel mechanism 200 drives only the hook 113.

  The stopper mechanism 500 of the present embodiment has a first stopper member on the lower rail 53. In the present embodiment, as shown in FIGS. 3 and 4, the cancel member 245 of the cancel mechanism 200 is used as the first stopper member.

  Then, as shown in FIG. 12, when the seat cushion (frame 61) is lowered to a substantially lowest position, the seat cushion (frame 61) can come into contact with the cancel member 245. A stopper plate 501 is provided as a second stopper member that prohibits movement to the position.

According to the stopper mechanism 500 having such a configuration, when the seat is lowered to the lowest position, the forward movement of the upper rail 55 of the seat track mechanism 51 can be prohibited.
Therefore, when the upper rail 55 is moved to the last position and the seat cushion (frame 61) is lowered to the lowest position, even if a large impact force is applied to the vehicle due to a collision or the like, the upper rail 55 of the seat track mechanism 51 is used. Does not move forward.

It is a block diagram which shows the state which has the sheet | seat of the 1st form example in the highest position. It is a block diagram which shows the state which has the sheet | seat of the 1st form example in the lowest position. It is a rear view of FIG. FIG. 3 is a rear view of FIG. 2. It is a perspective view explaining the seat slide lock mechanism 300 of FIG. It is sectional drawing in the cutting line MM of FIG. FIG. 2A is an enlarged view of a cancel mechanism, FIG. 2A is an enlarged view of the state of FIG. 1, and FIG. 2B is an enlarged view of the state of FIG. FIG. 4 is a plan view showing components of the cancel mechanism of FIG. 3, wherein (a) shows a first cancel lever, (b) shows an operation lever, (c) shows a hook drive lever, and (d) shows a base. ing. It is sectional drawing in the cutting line NN of FIG. It is a block diagram which shows the state which has the sheet | seat of the 2nd form example in the highest position. It is a block diagram which shows the state which has the sheet | seat of the 2nd form example in the lowest position. It is a rear view of FIG. FIG. 12 is a rear view of FIG. 11.

Explanation of symbols

51 Seat Track Mechanism 53 Lower Rail 55 Upper Rail 61 Frame 71 Front Link 81 Rear Link 100 Lock Mechanism 200 Cancel Mechanism 300 Seat Slide Lock Mechanism 400 Stopper Mechanism

Claims (6)

A seat track mechanism comprising a lower rail provided on the floor side, and an upper rail movably engaged with the lower rail;
A front link having a lower part rotatably attached to the front part of the upper rail and an upper part rotatably attached to the front part of the seat cushion;
A lower link rotatably attached to the rear part of the upper rail, and an upper part rotatably attached to the rear part of the seat cushion;
A lifting / lowering locking mechanism that prohibits rotation of at least one of the front link and the rear link, and prohibits the lifting / lowering of the seat cushion;
A cancellation mechanism that prevents the unlocking lock mechanism from being unlocked unless the upper rail is moved to the last position of the lower rail;
A stopper mechanism that prohibits the upper rail from moving forward when unlocking the elevating lock mechanism and lowering the seat cushion to the lowest position;
A sheet characterized by comprising: The seat slide lock mechanism is
A plurality of engaged portions provided on the lower rail along the moving direction of the upper rail;
An engaging portion that is provided on the upper rail side and prohibits the movement of the upper rail by engaging with the engaged portion;
An urging means for urging the engaging portion in a direction to engage the engaged portion;
A seat slide locking mechanism consisting of
The stopper mechanism is
A stopper that is rotatably provided on the upper rail side and prohibits movement of the engaging portion in a state of being engaged with the engaged portion when the seat cushion is lowered to a substantially lowest position;
The sheet according to claim 1, comprising: The stopper mechanism is
A first stopper member provided on the lower rail;
A second stopper member which is provided on the seat cushion and is capable of contacting the first stopper when the seat cushion is lowered to a substantially lowest position, and prohibits forward movement of the upper rail by contacting the first stopper; ,
The sheet according to claim 1, comprising: The lifting lock mechanism is
A lock pin provided on the seat cushion;
The lock pin has a long hole to be fitted, and an end portion is rotatably attached to a portion further above the rotation center of the rear link on the seat cushion side. The movement of the rear link causes the lock pin to be a long hole. A long link that moves within the range of contact with the end of the
The long link is rotatably mounted on the long link so that the lock pin is engaged with the lock pin in a state where the lock pin is in contact with one end of the elongated hole and in a state of being in contact with the other end. A hook that prohibits,
Hook biasing means for biasing the hook in a direction in which the hook engages with the lock pin;
The sheet according to claim 1, comprising: The cancellation mechanism is
A hook drive lever that is rotatably provided on the seat cushion, has an arm portion extending in a radial direction, and rotates in one direction to drive a hook of the lock mechanism and a stopper of the stopper mechanism;
Hook drive lever biasing means for biasing the hook drive lever in the direction of rotation in the other direction;
A hook drive lever stopper for prohibiting movement of the hook drive lever biased by the hook drive lever biasing means;
An operation lever that is provided rotatably about the rotation center axis of the hook drive lever, and has an elongated hole extending further from the tip of the arm portion of the hook drive lever in the radial direction;
A cancel pin that is movably engaged with the elongated hole and is capable of contacting the side surface of the arm portion of the hook drive lever;
An operation lever urging means for urging the operation lever in a direction in which the cancel pin moves away from the arm portion of the hook drive lever;
An operation lever stopper for prohibiting movement of the operation lever biased by the operation lever biasing means;
The hook drive lever is provided in the vicinity of the hook drive lever so as to be rotatable, engages with the cancel pin, and rotates so that the cancel pin can come into contact with a side surface of the arm portion of the hook drive lever. A first cancel lever having a guide hole that moves along a long hole of the operation lever between a position that does not contact the side surface of the arm portion of
First cancel lever urging means for urging the first cancel lever so that the cancel pin does not contact the side surface of the arm portion of the hook drive lever;
A second cancel lever provided rotatably on the upper rail and rotating the first cancel lever by rotating;
A cancel member provided on the lower rail side, and the second cancel lever abuts when the upper rail is retracted to the vicinity of the last position;
A second cancel lever stopper that prohibits the second cancel lever from rotating beyond a position where it can contact the cancel member;
Second cancel lever biasing means for biasing the second cancel lever in a direction in which the second cancel lever comes into contact with the second cancel stopper;
The sheet according to any one of claims 1 to 4, wherein   The seat according to claim 5, wherein the hook driving lever drives a stopper of the stopper mechanism.

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