JP4527498B2 - 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 an 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.

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 lock mechanism that prohibits rotation of at least one of the front link and the rear link, and a cancel lever that allows the lock mechanism to be unlocked when the upper rail is moved to the last position of the lower rail. has a canceling mechanism having, a scan of the cancel mechanism Rureba is a sheet, characterized in that provided on the upper rail side.

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.

  According to a second aspect of the present invention, the lock mechanism includes a lock pin provided in the seat cushion and a long hole into which the lock pin is fitted, and an end portion of the lock mechanism is from a rotation center of the rear link on the seat cushion side. Further, a long link that is rotatably attached to the upper part and moves within a range in which the lock pin abuts on an end of the elongated hole by the movement of the rear link, and is provided rotatably on the long link. Engaged with the lock pin in a state of abutting on one end of the elongated hole and in a state of abutting on the other end of the long hole, and a hook that prohibits movement of the long link; and the hook on the lock pin 2. The seat according to claim 1, further comprising hook urging means for urging the hook in an engaging direction.

  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 third aspect of the present 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 2.

  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.

According to the first to third aspects of the invention, when the upper rail is moved to the last position of the lower rail, the seat has a cancel mechanism that has a cancel lever that enables the lock mechanism to be unlocked. It is possible to move up and down only at the last position of the track mechanism.

  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.

  According to the second 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, the overall configuration of the sheet according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a configuration diagram illustrating a state in which the sheet is at the highest position, and FIG. In these drawings, the seat track mechanism 51 includes a lower rail 53 disposed on the floor side and an upper rail 55 movably engaged with the lower rail 53.

  The upper part of the front link 71 is rotatably attached to the front part of the frame 61 of the seat cushion using a pin 73, and the upper part of the rear link 81 is rotatably attached to the rear part of the frame 61 using a pin 83. It has been.

  The lower portion of the front link 71 is rotatably attached to the front portion of the upper rail 55 using a pin 75, and the lower portion of the rear link 81 is rotatably attached to the 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.

  A lock mechanism 100 that prohibits rotation of the rear link 81 is provided at the rear portion of the frame 61, and the lock mechanism 100 is operated at the front portion of the seat unless the upper rail 55 is moved to the last position with respect to the lower rail 53. A canceling mechanism 200 is provided so as not to do so.

Here, the lock mechanism 100 will be described. A lock pin 101 is provided on the frame 61.
A long link 105 is rotatably attached to the upper portion of the rear link 81 above the pin 83 which is the center of rotation on the frame 61 side using a pin 103. 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 in which 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 elongated 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 (arrow A direction in FIGS. 1 and 2) to be engaged with the lock pin 101 by hook urging means (not shown).
Here, the operation of the lock mechanism 100 will be described. When the seat is at the highest position and the lock mechanism 100 is in the locked state 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 The unlocked state in which rotation is possible becomes possible, and the seat 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.

  In the state shown in FIG. 2 in which the seat is at the lowest position and the lock mechanism 100 is in the locked state, 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 is The unlocked state in which the rotation of 81 is possible, and the seat can be moved 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 cancellation mechanism 200 will be described with reference to FIGS. 3 is an enlarged view of the cancel mechanism, (a) is an enlarged view of the state of FIG. 1, (b) is an enlarged view of the state of FIG. 2, and FIG. 4 is a plan view showing each part of the cancel mechanism of FIG. In the figure, (a) is a first cancel lever, (b) is an operation lever, (c) is a hook drive lever, and (d) is 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 lock mechanism 100 are cylindrical, and the ends are between the base 201 of the cancel mechanism 200 and the long link 105 of the lock mechanism 100. A locked outer casing 207, a wire 211 made of an inner wire 209 that is movably inserted through the outer casing 207 and whose ends are locked to the hook drive lever 205 and the hook 113 are provided. When the inner wire 209 is rotated in the pulling direction (one direction), the hook 113 is also rotated. 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. 3). The base 201 is formed with a stopper 215 as a hook drive lever stopper for preventing the hook drive lever 205 from moving by contacting 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. Then, the operation lever 217 is urged in a direction in which the cancel pin 221 is separated from the arm portion 213 of the hook drive lever 205 (arrow C direction in FIG. 3) 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. 1 and 2, a bracket 240 is provided on the 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. Then, a second cancel lever urging means (not shown) urges the second cancel lever 243 in a direction in which it abuts against the second cancel stopper 247 (the direction of arrow E in FIGS. 1 and 2).

  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 in such a manner that the wire 291 is formed of an inner wire 289 whose end is locked to the first cancel lever 233 and the second cancel lever 243, and the second cancel lever 247 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 not in contact with the hook drive lever 205, so that the hook of the lock mechanism 100 is driven. The hook driving lever 205 is not rotated and the lock mechanism is 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 drive for driving the hook 113 of the lock mechanism 100 is performed. The lever 205 rotates and the lock mechanism 100 is unlocked.

According to such a configuration, the following effects can be obtained.
(1) By having the cancel mechanism 200 that prevents the lock mechanism 100 from operating unless the upper rail 55 is moved to the last position with respect to the lower rail 53, it is possible to move up and down only when the seat is at the last position of the seat track mechanism. Become.

 (2) With one hook 113, the lock pin 101 engages with the lock pin 101 in a state where it abuts on one end of the long hole 107 and a state where it abuts on the other end, and the long link 105 is moved. 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.

  The present invention is not limited to the above embodiment. Although the lock mechanism 100 of the above-described embodiment prohibits the rotation of the rear link 81, the lock mechanism 100 may be configured to prohibit the rotation of the front link 71, or the lock of both the rear link 81 and the front link 71 may be locked. A mechanism may be provided.

It is a block diagram which shows the state which has a sheet | seat in the highest position. It is a block diagram which shows the state which has a sheet | seat in the lowest position. FIGS. 2A and 2B are enlarged views of the cancel mechanism, in which FIG. 1A is an enlarged view of the state of FIG. 1, and 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.

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

Claims (3)

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 lock mechanism that prohibits rotation of at least one of the front link and the rear link;
When the upper rail is moved to the last position of the lower rail, a cancel mechanism having a cancel lever that can unlock the lock mechanism;
Have,
A cancel lever of the cancel mechanism is provided on the upper rail side . The locking 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 driving lever that is rotatably provided on the frame, has an arm portion extending in a radial direction, and drives a hook of the lock mechanism by rotating in one direction;
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 claim 2, comprising:

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