JP2007055525A - Seat slide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat slide device capable of regulating the movement of an operation lever while maintaining a sound state of the operation lever so that a locking mechanism of the seat slide device is not in a lock-off state even in a rear-end collision of a vehicle. <P>SOLUTION: The seat slide device comprises a lower rail 2 which is mutually and slidably inserted and mounted on a vehicle body side in the longitudinal direction of the vehicle body, and an upper rail 3 which is mounted on a lower side of a seat 4 in the longitudinal direction of the vehicle body, and further comprises an operation lever 6 which is arranged on a front lower side of the seat 4 to operate a lock mechanism to perform the lock-off action by the upward operation. A regulation means X is added thereto, which permits the upward movement of the operation lever 6 in a normal state, while it is operated by the inertia force in a rear-end collision of the vehicle to regulate the upward movement of the operation lever 6. The regulation means X is operated by the inertial force to regulate the upward movement of the operation lever 6 in a rear-end collision of the vehicle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat slide device that slidably supports a vehicle seat, and more particularly to a device that prevents malfunction of the seat slide device during a rear-end collision of the vehicle.

  As shown in FIG. 3, the seat slide device A that has been well known in the art includes, for example, a lower rail 2 and a lower surface of the seat 4 that are slidably inserted into each other and attached in the vehicle longitudinal direction on the vehicle body side. 1 is provided with a slide rail 1 composed of an upper rail 3 mounted in the longitudinal direction of the vehicle body. The slide rails 1 and 1 are arranged at a predetermined interval in the vehicle width direction, and the upper rail 2 in each slide rail 1 is By supporting the seat 4, the seat 4 can slide in the longitudinal direction of the vehicle body.

  The seat slide device A selectively performs a locking action for restricting sliding between the lower rail 2 and the upper rail 3 and a locking-off action for allowing sliding between the lower rail 2 and the upper rail 3. A lock mechanism 5 and an operation lever 6 that is disposed at the lower front side of the seat 4 and that operates the lock mechanism 5 to perform a lock-off action by an upward operation are additionally provided.

  The lock mechanism 5 includes a plurality of lock holes 7 formed on the inner surface of the lower rail 2 at predetermined intervals, and a lock plate 9 attached to the upper rail 3 via a lock bracket 8. The lock claw (not shown) of the lock plate 9 engages with a selected one of the lock holes 8, 8... Thereby restricting relative sliding between the lower rail 2 and the upper rail 3. A locked state, and a lock-off state in which relative sliding between the lower rail 2 and the upper rail 3 is allowed when the lock claw is detached from a selected one of the lock holes 8, 8. Is supposed to be realized.

  In order to rotate the lock plate 9 between a locked state and a lock-off state, a rod 10 is attached to the lock plate 9 and the rod 10 is moved via a rotating lever 11 by an operation lever 6 described in detail later. In addition to being configured to be able to rotate, a spring 12 is attached to the other end of the rod 10 so that the urging force of the spring 12 acts against the operating force of the operating lever 6.

  In order to perform the slide lock-off operation by the operation lever 6 in synchronization with each of the pair of slide rails 1, 1, the operation lever 6 is bent into a U-shape, and the central portion thereof is the operation portion. 6a, and both side portions thereof are arm portions 6b and 6b, and the tip portions of the arm portions 6b and 6b are respectively provided as hinge connecting portions 13 and 13 on the upper rail 3 side via a hinge bracket 14. The hinge pin 15 is hingedly connected.

  In the case of the above-described seat slide device, in a normal state, as shown in FIG. 4 (a), when the operation lever is moved upward, the lock mechanism is in a lock-off state. 4 (b), when the occupant M is in the supine posture on the seat, the foot L of the occupant M pushes the operation lever upward, and the lock mechanism of the seat slide device is in the lock-off state. There is a risk of becoming. When such a state occurs, the rod mechanism is locked off and the seat slides back and forth, causing a problem that the occupant M is at risk.

  In order to deal with the above problems, when a rear impact is applied to the vehicle, the seated occupant's foot moves backward and kicks the operating lever, so that the operating lever is operated upwardly by a predetermined value or more. When the impact load in the direction is applied, the shock absorber formed near the connecting portion of the operation lever to the front portion of the lock plate buckles and deforms so as to absorb the impact load in the upward movement direction. There has been proposed one that can prevent the lock-off in advance (see Patent Document 1).

Japanese Patent Application Laid-Open No. 2004-175308.

  In the case of the technique disclosed in Patent Document 1 described above, when an impact at the time of rear impact is applied, the shock absorbing portion of the operating lever is buckled and deformed, so the operating lever must be replaced with a new one each time. In addition to being troublesome, it is also disadvantageous in terms of cost.

  The present invention has been made in view of the above points, and the operation lever is maintained while maintaining a healthy state of the operation lever so that the lock mechanism of the seat slide device does not enter the lock-off state even at the time of rear-end collision of the vehicle. It aims to be able to regulate the movement of.

  In the present invention, as a first means for solving the above-mentioned problems, the lower rail 2 and the lower surface of the seat 4 which are slidably fitted to each other and are mounted on the vehicle body side in the vehicle longitudinal direction are arranged in the vehicle longitudinal direction. The upper rail 3 is attached to the upper rail 3 and selectively has a locking action for restricting sliding between the lower rail 2 and the upper rail 3 and a locking-off action for allowing sliding between the lower rail 2 and the upper rail 3. In a seat slide device comprising: a lock mechanism 5 formed on the front side of the seat 4; and an operation lever 6 which is disposed at a lower front side of the seat 4 and operates the lock mechanism 5 to perform a lock-off action by an upward operation. The operation lever 6 is allowed to move upward at times, but due to the inertial force at the time of rear collision of the vehicle It is attached a regulating means X for regulating the operation of moving upward of the operating lever 6 is created.

  With the configuration described above, since the restricting means X is allowed to move upwardly on the operation lever 6 in a normal state, the lock mechanism 5 is locked off by the upward operation of the operation lever 6. In this state, the seat 4 can be positioned at a desired seat position by sliding the seat 4 in the front-rear direction. On the other hand, at the time of the rear impact of the vehicle, the restricting means X is operated by the inertial force to move the operation lever 6 upward Will be regulated. Therefore, even if the occupant M is in a supine posture due to an impact at the time of a rear collision, and the leg L of the occupant M is caught on the operation lever 6, the operation lever 6 is held by the restricting means X while maintaining a healthy state of the operation lever 6. Since the upward movement operation is restricted, the lock mechanism 5 is not in the lock-off state, and it is possible to avoid the danger caused by the seat 4 being slid carelessly.

  In the present invention, as a second means for solving the above-described problem, in the seat slide device including the first means, the regulating means X is rotated toward the seat side member including the upper rail 3. A stopper plate 17 that is pivotally supported, and a positioning that positions the stopper plate 17 at a position that allows an upward movement operation of the operation lever 6 or a position that restricts an upward movement operation of the operation lever 6. In this case, the stopper plate 17 and the positioning means 18 can constitute the restricting means X, and the upper portion of the operation lever 6 at the time of the rear collision can be achieved with a simple structure. The movement operation to can be regulated.

  In the present invention, as a third means for solving the above-described problem, in the seat slide device having the second means, the stopper plate 17 is operated by an inertial force at the time of a rear collision of the vehicle. It is also possible to provide an engagement portion 20 that engages with the operation lever 6 in this case, and in such a case, the engagement of the engagement portion 20 of the stopper plate 17 and the operation lever 6 causes the operation lever at the time of a rear collision. The upward movement operation of 6 can be reliably controlled.

  In the present invention, as a fourth means for solving the above-mentioned problems, in the seat slide device provided with the second or third means, the positioning means 18 is replaced with the stopper plate 17 and the upper rail. 3 can be configured by a torsion spring installed between the sheet side member 3 and the structure, and in such a configuration, the structure of the positioning means 18 can be simplified.

  According to the first means of the present invention, the lower rail 2 which is slidably fitted to each other and is mounted on the vehicle body side in the longitudinal direction of the vehicle body, and the upper which is mounted on the lower surface of the seat 4 in the vehicle body longitudinal direction. A locking mechanism 5 comprising a rail 3 and selectively performing a locking action for restricting sliding between the lower rail 2 and the upper rail 3 and a locking-off action for allowing sliding between the lower rail 2 and the upper rail 3; In the seat slide device provided with an operation lever 6 disposed at the lower front side of the seat 4 and operating the lock mechanism 5 to perform a lock-off action by an upward operation, the operation lever is normally used. 6 is allowed to move upward, but is operated by the inertial force at the time of rear-end collision of the vehicle, and the operation lever 6 A restricting means X for restricting the moving operation toward the direction is provided, and since the restricting means X is allowed to move upward to the operation lever 6 in a normal state, the upward operation of the operation lever 6 is performed. The lock mechanism 5 can be placed in a lock-off state and the seat 4 can be positioned at a desired seat position by sliding the seat 4 in the front-rear direction. 6 can be controlled so that the occupant M is in a supine posture due to an impact at the time of a rear impact without disturbing the positioning of the seat at the normal time, and the foot L of the occupant M is operated. Even if the lever 6 is caught, the operation lever 6 is restricted from being moved upward by the restricting means X while maintaining the healthy state of the operation lever 6. Mechanism 5 does not become locked OFF state, there is an effect that it is possible to avoid the risk caused by the sheet 4 is inadvertently slide.

  As in the second means of the present invention, in the seat slide device including the first means, the restricting means X is pivotally supported on the side of the seat side member including the upper rail 3 so as to be rotatable. It is also possible to configure the plate 17 and positioning means 18 for positioning the stopper plate 17 at a position allowing the upward movement operation of the operation lever 6 or a position restricting the upward movement operation of the operation lever 6. In such a configuration, the stopper plate 17 and the positioning means 18 can constitute the restricting means X, and the upward movement of the operation lever 6 at the time of rear collision can be restricted with a simple structure. Can do.

  As in the third means of the present invention, in the seat slide device provided with the second means, the stopper plate 17 is engaged with the operation lever 6 in a state in which the stopper plate 17 is operated by an inertial force at the time of rear collision of the vehicle. The engaging portion 20 can be provided. In such a configuration, the engaging portion 20 of the stopper plate 17 and the operating lever 6 can be engaged to move the operating lever 6 upward during a rear collision. It can be regulated reliably.

  As in the fourth means of the present invention, in the seat slide device provided with the second or third means, the positioning means 18 is made up of the stopper plate 17 and the seat side member including the upper rail 3. It can also be constituted by a torsion spring installed between them. In such a case, the structure of the positioning means 18 can be simplified.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  The seat slide device A has the same structure as that described in the background section, and as shown in FIGS. 1 and 2, the seat slide device A is slidably inserted into each other, and in the vehicle longitudinal direction on the vehicle body side. A slide rail 1 including a lower rail 2 attached toward the vehicle body and an upper rail 3 attached to the lower surface of the seat 4 toward the vehicle body in the longitudinal direction. The slide between the lower rail 2 and the upper rail 3 is regulated. A lock mechanism (not shown) that selectively performs a lock action and a lock-off action that allows the lower rail 2 and the upper rail 3 to slide, and a front lower portion of the seat 4 are arranged to be operated upward. An operation lever 6 is attached to operate the lock mechanism so as to perform a lock-off action.

  A base plate 16 extending forward is fixed to a front end portion of the upper rail 3 in the seat slide device A, and the operation lever 6 is normally moved upward at a tip portion of the base plate 16. An operation (that is, a movement operation in the direction indicated by the arrow P) is allowed, but a regulating means X that operates by an inertial force at the time of a rear collision of the vehicle and regulates the upward movement operation of the operation lever 6 is attached. ing.

  The front restricting means X includes a stopper plate 17 pivotally supported at the tip of the base plate 16 and a position allowing the stopper plate 17 to be moved upward of the operation lever 6 or the operation lever 6. And positioning means 18 for positioning at a position for restricting the upward movement operation.

  The stopper plate 17 is made of an inverted L-shaped metal plate member, and pivotally supports the tip portion of one side 17 a with respect to the tip portion of the base plate 16 via a pin 19. , Swingable in the front-rear direction. Further, at the front end portion of one side 17a of the stopper plate 17, an engaging portion 20 having a downward projecting shape that engages with the operation lever 6 in a state in which the stopper plate 17 is operated by an inertial force at the time of rear collision of the vehicle, A protruding spring receiver 21 is integrally formed. Furthermore, a weight 22 is provided on the upper surface of the other side 17b of the stopper plate 17 so as to amplify the inertial force at the time of rear collision of the vehicle.

  The positioning means 18 is constituted by a torsion spring installed between the spring receiver 21 of the stopper plate 17 and the front end portion of the upper rail 3. Reference numerals 23 and 24 denote holes for locking both ends of the torsion spring 18.

  In the seat slide device configured as described above, the following operational effects can be obtained.

  That is, in the normal state, the restricting means X is in a state of permitting the upward movement of the operation lever 6, so that the lock mechanism is locked off by the upward operation of the operation lever 6, and the seat 4 is moved in the front-rear direction While the vehicle can be positioned at a desired seat position, the restricting means X can be operated by the inertial force to restrict the upward movement operation of the operation lever 6 at the time of the rear collision of the vehicle. . Therefore, even if the occupant M is in a supine posture due to an impact at the time of a rear collision without hindering the seat positioning at the normal time, even if the foot L of the occupant M is caught on the operation lever 6, the healthy state of the operation lever 6 is maintained. While the holding lever is held, the upward movement operation of the operation lever 6 is restricted by the restricting means, and the lock mechanism 5 is not in the lock-off state, thereby avoiding a danger caused by the seat 4 sliding unintentionally. it can.

  Further, the restricting means X is provided on the side of the seat side member including the upper rail 3 (specifically, a stopper plate 17 pivotally supported by the base plate 16 and the stopper plate 17 above the operation lever 6. Since the positioning means 18 is positioned at a position that allows the movement operation or a position that restricts the upward movement operation of the operation lever 6, the restriction means X can be configured by the stopper plate 17 and the positioning means 18. As a result, the upward movement operation of the operation lever 6 at the time of rear collision can be restricted with a simple configuration.

  Further, by providing the stopper plate 17 with the engaging portion 20 that engages with the operation lever 6 in a state where the stopper plate 17 is operated by the inertial force at the time of rear collision of the vehicle, the engaging portion 20 of the stopper plate 17 and the operation lever 6 By this engagement, it is possible to reliably restrict the upward movement operation of the operation lever 6 at the time of rear collision.

  Further, the positioning means 18 is constituted by a torsion spring installed between the stopper plate 17 and the seat side member (specifically, the upper rail 3) including the upper rail 3, thereby simplifying the structure of the positioning means 18. Can be

  In the above embodiment, the stopper plate 17 is pivotally supported with respect to the base plate 16 fixed to the upper rail 3, but the stopper plate 17 is directly pivotally supported on the upper rail 3, or It can also be set as the structure pivotally supported by the cushion side frame of the seat 4.

  The invention of the present application is not limited to the above-described embodiment, and it is needless to say that the design can be appropriately changed without departing from the gist of the invention.

It is a side view which shows the state at the time of the normal of the seat slide apparatus concerning embodiment of this invention. It is a side view which shows the state at the time of the vehicle rear collision of the seat slide apparatus concerning embodiment of this invention. It is a perspective view which shows a conventionally well-known seat slide apparatus. It is a side view which shows the state at the time of the normal time in a conventionally well-known seat slide apparatus, and vehicle rear-end collision, (A) is normal time, (B) shows the time of vehicle rear-end collision.

Explanation of symbols

1 is a slide rail 2 is a lower rail 3 is an upper rail 4 is a seat 5 is a lock mechanism 6 is an operation lever 17 is a stopper plate 18 is a positioning means (torsion spring)
20 is an engaging portion X is a regulating means

Claims (4)

It consists of a lower rail (2) which is slidably inserted into each other and is mounted on the vehicle body side in the longitudinal direction of the vehicle body, and an upper rail (3) which is mounted on the lower surface of the seat (4) in the longitudinal direction of the vehicle body. A lock that selectively performs a locking action for restricting sliding between the lower rail (2) and the upper rail (3) and a lock-off action for allowing sliding between the lower rail (2) and the upper rail (3). A seat provided with a mechanism (5) and an operation lever (6) disposed at the lower front side of the seat (4) and operating the lock mechanism (5) to perform a lock-off action by an upward operation. It is a sliding device, which normally allows the operation lever (6) to move upward, but is operated by the inertial force at the time of rear collision of the vehicle. Serial seat slide apparatus characterized by annexed regulation means (X) for regulating the operation of moving upward the operating lever (6). A stopper plate (17) pivotally supported by the regulating means (X) on the side of the seat side member including the upper rail (3), and the stopper plate (17) is attached to the operating lever (6). The seat slide according to claim 1, characterized by comprising a positioning means (18) for positioning at a position permitting the upward movement operation or a position for restricting the upward movement operation of the operation lever (6). apparatus. 3. The stopper plate (17) is provided with an engaging portion (20) that engages with the operation lever (6) in a state in which the stopper plate (17) is operated by an inertial force at the time of rear collision of the vehicle. Seat slide device. The positioning means (18) is constituted by a torsion spring constructed between the stopper plate (17) and a seat side member including the upper rail (3). A seat slide device according to claim 1.

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