JP4157005B2 - Seat track - Google Patents

Description

  The present invention provides a lower rail provided on the floor side, an upper rail provided on the seat side and movably engaged with the lower rail, and provided on one of the lower rail and the upper rail, and the other rail. A locking means for prohibiting the movement of the upper rail when engaged, a first urging means for urging the locking means in a direction to engage the other rail, and provided on the one rail. An unlocking means that can contact the locking means and pushes the locking means to move the locking means away from the other rail; and attaches the unlocking means in a direction away from the locking means. The present invention relates to a seat track having second urging means.

  13 is a perspective view of a conventional seat track, and FIG. 14 is a cross-sectional view of the main part of FIG. In these drawings, an upper rail 3 provided with a seat is movably engaged with a lower rail provided on the floor side.

  A rotating shaft 5 is disposed along the upper rail 3 on the upper rail 3 side, and the rotating shaft 5 is rotatably supported by a bearing 7 provided on the upper rail 3.

  A bracket 11 is rotatably provided on a side portion of the bearing 7 by using a screw 9. An operating lever 15 is attached to the bracket 11 and a groove 11a is formed. On the other hand, the rotating shaft 5 is provided with a connecting pin 13 that fits into the groove 11 a of the bracket 11.

  As shown in FIG. 14, a lock plate 15 having a plurality of lock holes formed along the lower rail 1 is attached to the side surface of the lower rail 1. On the other hand, a lock lever 17 that can be engaged with and disengaged from the lock hole of the lock plate 15 is attached to the rotary shaft 5. Further, the rotating shaft 5 is biased in a direction in which a lock lever 17 attached to the rotating shaft 5 is engaged with a lock hole of the lock plate 15 by a biasing means (not shown).

  A reinforcing member 21 that bridges the left and right upper rails is provided on the upper portion of the upper rail 3, and an elastic member 23 with which the side surface of the bracket 11 can contact is attached to the lower surface of the reinforcing member 21.

  Next, the operation of the above configuration will be described. When the operation lever 15 is not operated, the lock lever 17 on the upper rail 3 side engages with the lock hole of the lock plate 15 on the lower rail 1 side by an unillustrated biasing means, and the upper rail 3 moves relative to the lower rail 1. Prohibited (locked state: see FIG. 13).

  Here, when the operation lever 15 is operated to rotate the bracket 11 in the direction of arrow A in FIG. 13 against the urging force of the urging means (not shown), the rotating shaft 5 rotates in the direction of arrow B, and the upper rail 3 The side lock lever 17 is detached from the lock hole of the lock plate 15 on the lower rail 1 side, and the upper rail 3 is movable with respect to the lower rail 1 (unlocked state). At this time, the bracket 11 comes into contact with the reinforcing member 21 via the elastic member 23, and further rotation of the operation lever 15 is prohibited. The elastic member 23 reduces the impact caused by the contact between the bracket 11 and the reinforcing member 21 (mainly, the impact sound caused by the contact between both).

After the upper rail 3 is moved to a desired position, when the operation force of the operation lever 15 is released, the lock lever 17 on the upper rail 3 side is moved forward of the lock plate 15 on the lower rail 1 side by the urging force of the urging means (not shown). Are engaged with different lock holes, and movement of the upper rail 3 relative to the lower rail 1 is prohibited (see, for example, Patent Document 1).
JP-A-10-129310 (2nd page, 3rd page, FIG. 1, FIG. 2)

  In the seat track having the above configuration, the bracket 11 presses the elastic member 23 when the operation lever 15 is operated to release the lock. When the operating lever 15 is operated with a large operating force, there is a problem that permanent deformation occurs in the elastic member 23 or the elastic member 23 is damaged.

  The present invention has been made in view of the above problems, and an object thereof is to provide a seat track having good durability without causing permanent deformation or breakage of an elastic member.

  The invention according to claim 1 is provided on one of the lower rail provided on the floor side, the upper rail provided on the seat side and movably engaged with the lower rail, the lower rail, and the upper rail. A locking means that can be engaged with and disengaged from the other rail and prohibits the movement of the upper rail when engaged, a first biasing means that biases the locking means in a direction to engage the other rail, and the one Provided on the rail, and can be brought into contact with the locking means, and pushes the locking means to move the locking means in a direction to detach from the other rail, and the unlocking means from the locking means. A seat track having a second urging means for urging in a separating direction, wherein the unlocking means and the locking means are the unlocking means. As the means pushes the locking means, the shape where the two abuts moves, and the unlocking means begins to push the locking means to either the unlocking means or the locking means. The seat track is characterized in that an elastic member that abuts the other at the time and is separated from the other as the unlocking means pushes the locking means is provided.

  Usually, by the urging force of the first urging means, the locking means provided on one of the upper rails engages with the other rail of the lower rail and the upper rail, and the upper rail on which the seat is provided is moved. Is prohibited.

  Here, when the unlocking means is operated against the urging force of the second urging means and the locking means is pushed, the locking means is released from the other rail against the urging force of the first urging means. The upper rail provided with the seat is movable. When the sheet is moved and the desired position of the sheet is obtained, the operation force to the lock release means is released. Then, due to the urging force of the second urging means, the unlocking means is separated from the locking means, and with the urging force of the first urging means, the locking means is engaged with the other rail, and the movement of the upper rail is prohibited, Movement of the sheet is prohibited.

  The invention according to claim 2 has stopper means for restricting movement of the unlocking means biased by the second biasing means, and the elastic member is provided in the unlocking means, and the stopper means The seat track according to claim 1, wherein the seat track can be brought into contact with the seat track.

  The elastic member is provided in the unlocking means and is capable of coming into contact with the stopper means so that when no operating force is applied to the unlocking means, the unlocking means biased by the second biasing means is It abuts on the stopper means via the elastic member.

  The invention according to claim 3 is the seat track according to claim 1 or 2, wherein the elastic member is an O-ring.

  In the invention according to claim 1, the lock release means and the lock means are shaped so that the abutting portions thereof move as the lock release means pushes the lock means, and the lock Either one of the releasing means and the locking means is an elastic member that comes into contact with the other when the unlocking means starts to push the locking means, and separates from the other as the unlocking means pushes the locking means When the lock release means pushes the lock means to move the seat, the lock release means first pushes the lock means via the elastic member. Therefore, the impact sound caused by the contact between the lock release means and the lock means is reduced. Then, as the unlocking means pushes the locking means, the abutment portion of both moves, and the unlocking means directly pushes the locking means. For this reason, a large force does not act on the elastic member, permanent deformation does not occur, no damage occurs, and the durability of the elastic member is improved.

  In the invention according to claim 2, only one elastic member for reducing the impact when the unlocking means abuts on the locking means and one elastic member for reducing the impact when the unlocking means contacts the stopper means are required. Therefore, the cost can be reduced.

  In the invention according to claim 3, since the elastic member is an O-ring, accuracy control is easy, and a dedicated part is manufactured.

Next, exemplary embodiments of the present invention will be described with reference to the drawings.
First, the overall configuration will be described with reference to FIG. 2 which is a perspective view of the seat track of this embodiment. Normally, two seat tracks are provided side by side on the seat, but the configuration shown in FIG. 2 shows one of the seat tracks.

  The lower rail 51 is provided on the floor via a front bracket 53 attached to the front lower surface using pins 52 and a rear bracket 55 attached to the rear lower surface using pins 54. An upper rail 57 provided with a seat is movably engaged with the lower rail 51. A seat mounting bracket 58 is provided on the front upper surface of the upper rail 57 using pins 56, and a seat mounting weld bolt 60 is provided on the rear upper surface.

A bracket 73 is attached to the upper rail 57 using pins 72. An open bracket 93 is provided at the front portion of the bracket 73. One end of the loop handle 95 is attached to the open bracket 93 using a spring 371. Further, the other end portion side of the loop handle 95 is attached to the open bracket of the other seat track.
Next, each part will be described in detail with reference to FIGS. 3 is a side view of the seat track of the embodiment, FIG. 4 is a top view of FIG. 3, FIG. 5 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 7 is a cross-sectional view taken along a cutting line CC in FIG. 3, FIG. 8 is a cross-sectional view taken along a cutting line DD in FIG. 3, and FIG. 9 is a cross-sectional view taken along a cutting line FF in FIG. 10 is a sectional view taken along the cutting line GG of FIG. 3, FIG. 11 is a sectional view taken along the cutting line H-H of FIG. 3, and FIG. 12 is a perspective view for explaining the lock lever of FIG.

  As shown in FIGS. 6 to 11, the lower rail 51 and the upper rail 57 have a substantially uniform cross-sectional shape. Therefore, it demonstrates using FIG. 10, and a code | symbol other than a required part is abbreviate | omitted in another figure. As shown in FIG. 10, the lower rail 51 includes a base 112 provided substantially parallel to the floor, and a first side wall 113 that is bent from one end of the base 112 and extends away from the floor. The second side wall 115 bent from the other end of the base 112 and extending away from the floor, and the first side toward the base 112 from the upper end of the first side wall 113. The hanging portion 117 includes a second hanging portion 119 that extends from the upper end portion of the second side wall portion 115 toward the base portion 112.

  The upper rail 57 is bent from a top portion 212 provided substantially parallel to the floor, and one end portion of the top portion 212, and a space between the first hanging portion 117 and the second hanging portion 119 of the lower rail 51 is formed. Via the first side wall 213 extending into the lower rail 51 and the other end of the top portion 212, and through the space between the first hanging portion 117 and the second hanging portion 119 of the lower rail 51. A first side wall portion 113 of the lower rail 51 that has a substantially J-shape from the second side wall portion 215 extending into the lower rail 51 and the lower end portion of the first side wall portion 213 and functions as a first separation preventing portion, The lower rail 51 that is substantially J-shaped from the lower end of the first side wall portion 215 and the first jumping upper portion 217 extending to the space formed by the first hanging portion 117 and functions as a second separation preventing portion. Formed by second side wall 115 and second hanging part 119 It has a second pop-section 219 Metropolitan extending into the space to be.

  2, 4, 5, and 11, between the first side wall 113 of the lower rail 51 and the first jumping upper part 217 of the upper rail 57, the second side wall 115 of the lower rail 51, Four steel balls 301 and steel balls 301 ′ are arranged between the upper rail 57 and the second jumping upper portion 219, and the upper rail 57 moves smoothly with respect to the lower rail 51. The distance between the four steel balls 301 and the steel balls 301 ′ is held by the retainer 303 and the retainer 303 ′.

  Here, the locking means and unlocking means of this embodiment will be described. In this embodiment, the unlocking means is an open bracket provided on the upper rail 57 side, and the locking means is a lock lever provided on the upper rail 57 side.

  As shown in FIGS. 2, 3, and 9, the bracket 73 is rotatably provided with a lock lever 67 as a lock release means using a pin 503. As shown in FIG. 12, three lock teeth 351 are formed on one rotation end side of the lock lever 67. A rectangular hole 352 is formed in the intermediate portion. On the other hand, a U-shaped hole 212 a is formed in the upper rail 57 from the top portion 212 to the first side wall portion 213. By forming the U-shaped hole 212 a of the upper rail 57, a bent portion 212 b is formed from the first side wall portion 213 to the top portion 212 of the upper rail 57. Then, the lock tooth 351 side of the lock lever 67 is inserted into the hole 212 a of the upper rail 57, the lock tooth 351 side of the lock lever 67 is located inside the upper rail 57, and the bent portion 212 b of the upper rail 57 is the hole 352 of the lock lever 67. By engaging with, the movement of the lock lever 67 in the longitudinal direction of the upper rail 57 is prohibited. In FIG. 12, a hole 67b of the lock lever 67 is a hole into which the pin 503 described above is fitted.

  As shown in FIG. 9, the first hanging portion 117 of the lower rail 51 is formed with a lock hole 65 in which the lock teeth 351 of the lock lever 67 can be engaged. A hole 68 and a hole 69 that face the lower rail 61 are formed in the first side wall portion 213 and the first jump upper portion 217 of the upper rail 57. Therefore, at the time of locking, the lock teeth 351 of the lock lever 67 extend to the hole 68 of the first side wall portion 213 of the upper rail 57, the lock hole 65 of the first hanging portion of the lower rail 51, and the hole 68 of the first jumping upper portion 217 of the upper rail 57. It can be fitted and high lock strength can be obtained. The other end side of the lock lever 67 is positioned below a stopper portion 73 a as a stopper means formed on the bracket 73.

  2, 3, and 4, both ends are wound around the pins 503 of the lock lever 67, both ends are locked to the lock lever 67, and the intermediate portion is folded into a U-shape. The lock lever 67 is biased in the direction in which the lock teeth 351 engage with the lock hole 65 by a spring (first biasing means) 81 that is bent and locked to the bracket 73.

  As shown in FIGS. 2, 3, 4, and 7, the open bracket 93 is rotatably provided on the bracket 73 using a pin 501. The open bracket 93 is formed with an arm portion 93 a extending in the direction of the lock lever 67. As shown in FIG. 9, a pressing portion A located in the space is formed between the other end portion side of the lock lever 67 and the stopper portion 73 a of the bracket 73 on the distal end portion side of the arm portion 93 a. . The open bracket 93 has a middle portion wound around the pin 501, a spring (second biasing means) 99 having one end locked to the bracket 73 and the other end locked to the open bracket 93. The pressing portion A of the arm portion 93a is urged in a direction in which the pressing portion A comes into contact with the stopper portion 73a of the bracket 73, that is, in a direction away from the other end side of the lock lever 67 as a locking means, as shown in FIG. Yes.

  In this embodiment, as shown in FIG. 9, an O-ring 601 as an elastic member is attached to the pressing portion A of the arm portion 93a. Since the open lever 93 is rotatably provided on a plane substantially parallel to the moving direction of the upper rail 57, and the lock lever 67 is rotatably provided on a plane substantially orthogonal to the plane, the arm portion of the open bracket 93 is provided. As the pressing portion A of 93a presses the other end portion (hereinafter referred to as a pressed portion B) of the lock lever 67, the contact portion of the pressed portion B of the lock lever moves.

  Further, the pressing portion A of the arm portion 93a of the open bracket 93 and the pressed portion B of the lock lever 67 have cross-sectional shapes in a plane orthogonal to the moving direction of the upper rail 57, and arc-shaped protruding surfaces facing each other. It has become. The O-ring 601 is provided at an end portion of the pressing portion A of the arm portion 93 in a cross section in a plane orthogonal to the moving direction of the upper rail 57, and is attached by a spring 99 when the loop handle 95 is not operated. The arm portion 93a of the opened open lever 93 is in contact with the stopper portion 73a of the bracket 73 serving as stopper means via the O-ring 601. At this time, the pressing portion A and the pressed portion B are set so that a slight gap (t) is opened between the lower portion of the O-ring 601 and the pressed portion B of the lock lever 67.

  Further, as shown in FIGS. 3, 4, 5, and 6, a stopper plate 403 is attached to the front inner wall surface of the upper rail 57 using a pin 56. The movement range of the upper rail 57 is restricted within a range in which the wall surfaces 403a and 403b (see FIG. 3) of the stopper plate 403 in the cross-sectional direction of the upper rail 57 come into contact with the pins 52 (see FIG. 5) protruding to the inside of the lower rail 51. ing.

  Here, the operation of the lock mechanism will be described. Normally, the lock lever 67 serving as the locking means has a lock tooth 351 whose hole is formed in the hole 68 in the first side wall portion 213 of the upper rail 57 and the lock hole in the first hanging portion of the lower rail 51 by the spring 81 serving as the first biasing means. 65, urged in a direction to engage with the hole 68 of the first jumping portion 217 of the upper rail 57, and the movement of the upper rail 57 (seat) relative to the lower rail 51 is prohibited. At this time, as described above, the arm portion 93a of the open lever 93 biased by the spring 99 is in contact with the stopper portion 73a of the bracket 73 serving as stopper means via the O-ring 601. At this time, a slight gap (t) is opened between the lower portion of the O-ring 601 and the pressed portion B of the lock lever 67.

  Here, when the loop handle 95 is lifted upward against the urging force of the spring 99 which is the second urging means, the arm portion 93a of the open bracket 93 which is the unlocking means moves downward, and the open bracket 93 The pressing portion A presses the pressed portion B of the lock lever 67 against the urging force of the spring 81 via the O-ring 601. The lock lever 67 rotates, and the lock teeth 351 of the lock lever 67 include holes 68 in the first side wall portion 213 of the upper rail 57, lock holes 65 in the first hanging portion of the lower rail 51, and holes in the first jumping portion 217 of the upper rail 57. The upper rail 57 (seat) can be moved with respect to the lower rail 51 by separating from 68.

  At this time, as the pressing portion A of the open bracket 93 presses the pressed portion B of the lock lever 67, as shown in FIG. 1, the abutting portion of both moves, and the pressing portion A of the open bracket 93 moves to the lock lever. The pressed portion B of 67 is directly pressed. At this time, a gap (t ′) is formed between the O-ring 601 and the pressed part B.

  When the sheet is moved and the desired position of the sheet is obtained, the operating force of the loop handle 95 is released. Then, due to the urging force of the spring 99, the arm portion 67a of the lock lever 67 is separated from the lock lever 67, and due to the urging force of the spring 81, the lock teeth 351 of the lock lever 67 are moved to the holes 68 in the first side wall portion 213 of the upper rail 57, Engage with the lock hole 65 of the first hanging portion of the lower rail 51 and the hole 68 of the first jumping portion 217 of the upper rail 57, the movement of the upper rail 57 relative to the lower rail 51 is prohibited, and the movement of the seat is prohibited.

According to such a configuration, the following effects can be obtained.
(1) When the pressing portion A of the open bracket 93 presses the pressed portion B of the lock lever 67 to move the seat, first, the pressing portion A of the open bracket 93 is moved via the O-ring 601 to the lock lever 67. The pressed part B is pressed. Therefore, the impact sound caused by the contact between the pressing portion A of the open bracket 93 and the pressed portion B of the lock lever 67 is reduced.
(2) As the pressing portion A of the open bracket 93 presses the pressed portion B of the lock lever 67, both contact portions move, and the pressing portion A of the open bracket 93 directly presses the pressed portion B of the lock lever 67. It becomes like this. For this reason, a large force does not act on the O-ring 601, permanent deformation does not occur, and no damage occurs, and the durability of the O-ring 601 is improved.
(3) The O-ring 601 is provided at the pressing portion A of the open bracket 93 and is capable of coming into contact with the stopper portion 73a of the bracket 73. The pressing portion A of the open bracket 93 urged by the spring 99 is in contact with the stopper portion 73 a of the bracket 73 via the O-ring 601. An elastic member that alleviates the impact when the pressing portion A of the open bracket 93 contacts the pressed portion B of the lock lever 67 and the impact when the pressing portion A of the open bracket 93 contacts the stopper portion 73a of the bracket 73. Since only one elastic member is required to reduce the cost, the cost can be reduced.
(4) By using the O-ring 601 as an elastic member, accuracy control is easy, and since a dedicated part is manufactured, it is a general-purpose product, so the cost can be reduced.

  The present invention is not limited to the above embodiment. For example, the open bracket 93 and the lock lever 67 are provided on the upper rail 57 side, and the lock hole 65 is provided on the lower rail 51 side. Conversely, the open bracket 93 and the lock lever 67 are provided on the lower rail 51 side, and the lock hole 65 is provided on the upper rail 57 side. May be provided. Furthermore, although the O-ring 601 is provided on the open bracket 93 side, it may be provided on the lock lever 67 side.

It is a figure explaining the invention part in a form example. It is a perspective view of the sheet track of an example. It is a side view of the seat track of an example. FIG. 4 is a top view of FIG. 3. FIG. 4 is a cross-sectional view taken along a cutting line AA in FIG. 3. FIG. 4 is a cross-sectional view taken along a cutting line BB in FIG. 3. FIG. 4 is a cross-sectional view taken along a cutting line CC in FIG. 3. FIG. 4 is a cross-sectional view taken along a cutting line DD in FIG. 3. It is sectional drawing in the cutting line FF of FIG. It is sectional drawing in the cutting line GG of FIG. It is sectional drawing in the cutting line HH of FIG. It is a perspective view explaining the lock lever of FIG. It is a perspective view of the conventional seat track. It is principal part sectional drawing of FIG.

Explanation of symbols

51 Lower rail 57 Upper rail 54 Pin (rear stopper)
403 Stopper plate 403c Wall

Claims (3)

Lower rail provided on the floor side,
An upper rail provided on the seat side and movably engaged with the lower rail;
Locking means that is provided on one of the lower rail and the upper rail, is detachable from the other rail, and prohibits movement of the upper rail when engaged,
First biasing means for biasing the locking means in a direction to engage with the other rail;
Unlocking means provided on the one rail, capable of contacting the locking means, and pressing the locking means to move the locking means away from the other rail;
Second urging means for urging the unlocking means in a direction away from the locking means;
In a seat track having
The unlocking means and the locking means are shaped so that the place where the two come into contact moves as the unlocking means pushes the locking means,
Either the unlocking means or the locking means abuts against the other when the unlocking means starts to push the locking means, and disengages from the other as the unlocking means pushes the locking means. A seat track provided with an elastic member. Stopper means for restricting movement of the unlocking means biased by the second biasing means;
The seat track according to claim 1, wherein the elastic member is provided in the unlocking unit and can contact the stopper unit.   The seat track according to claim 1, wherein the elastic member is an O-ring.

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