JP2007230333A - Seat sliding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat sliding device capable of preventing an operation lever from being operated by an impact from a rear side with respect to a seat body. <P>SOLUTION: The seat sliding device comprises a seat body 3 mounted on a vehicle movably in the longitudinal direction, an upper rail 5 fixed to the seat body 3 along the longitudinal direction, a lower rail 7 which is slidable with the upper rail 5 and provided on the vehicle along the longitudinal direction, a lock plate 13 having a lock hole to be engaged with a lock tooth 9 formed in the lower rail 7 and turnably supported by the upper rail 5, and an operation lever 17 connected to the lock plate 13 via a connection part 15. A lock mechanism 19 is formed of the lock tooth and the lock hole 11, and an improper operation preventive means 21 for preventing any unlocking operation of the lock mechanism 19 by the operation of the operation lever 17 by the impact from a rear side with respect to the seat body 3 is provided on the operation lever 17 and the upper rail 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an operation lever lock structure for a seat slide device that prevents an operation lever from being operated by an impact from behind on a seat body and releasing a lock mechanism of the seat slide device.

  Patent Document 1 describes a seat slide device that can unlock a lock mechanism and move a seat body in the front-rear direction by operating an operation lever provided on a seat body of a vehicle.

  In this seat slide device, the locking mechanism has an engagement hole and a lock tooth formed on the lower rail, a lock plate that engages with the lock tooth, and a tip that is formed on the lock plate and engages with the engagement hole of the lower rail. A lock claw and an engagement piece having a locking hole that is fixed to the upper rail and engages with a lock claw at the tip of the lock plate are provided.

In such a seat slide device, the lock plate engages with the lock teeth of the lower rail and the tip lock claw engages with the engagement hole of the lower rail, so that the lock plate is double-locked and the lock strength is high. . Moreover, since the front-end | tip lock nail | claw of a lock plate engages also with the latching hole of an engagement piece, it is locked in triple and the lock strength is still higher.
JP 2004-114769 A

  In the above-described seat slide device, the lock strength of the lock mechanism is improved as a structure in which the lock mechanism is double or triple locked.

  However, in the seat slide device as described above, there is an operation lever that unlocks the lock mechanism by an inertial force that works due to an impact such as a load in the luggage compartment located behind the seat collides with the seat body from the rear during sudden braking. Therefore, there is a possibility that the seat body is moved by unlocking the lock mechanism without the occupant operating the operation lever.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an operation lever lock structure for a seat slide device that can prevent the operation lever from being operated by an impact from behind on the seat body as described above.

  The invention according to claim 1 is a seat main body movably mounted in the front-rear direction of the vehicle, an upper rail fixed to the seat main body along the front-rear direction, and slidable with the upper rail. And a lock plate that engages with a lock portion formed on the lower rail, and is rotatably supported by the upper rail, and is coupled to the lock plate by a coupling portion. A lock mechanism that restricts movement of the seat body by the lock portion and the lock hole, and the lock mechanism is unlocked by operating the control lever. The operation lever and the upper rail are actuated by a rear impact on the seat body to operate the lock machine. Characterized in that the malfunction prevention means for preventing the unlocking operation is provided.

  The invention according to claim 2 is the seat slide device according to claim 1, wherein the connecting portion is provided with an elliptical long hole provided in the operation lever and a protrusion of the lock plate. A protrusion disposed at one end, and a biasing means provided between the operation lever and the lock plate, and biasing so that the protrusion is positioned at one end of the elongated hole; The malfunction prevention means includes the connecting portion, a notch recess provided in the operation lever, and the notch when projecting from the one end of the elongated hole and protruding from the upper rail. It has the stopper convex part fitted to a recessed part, It is characterized by the above-mentioned.

  In the seat slide device according to the first aspect, since the operation lever, the upper rail, and the connecting portion are provided with the malfunction prevention means, the luggage in the luggage compartment located behind the seat collides with the seat body from the rear during sudden braking. Even if the operating lever is to be operated by the inertial force that is caused by the impact of the shock, the operation lever is prevented from being operated by the malfunction preventing means, and the lock mechanism is not unlocked. For this reason, the seat body does not move due to an impact from behind on the seat body, and the safety of the passenger can be improved.

  According to another aspect of the present invention, there is provided a seat slide device comprising: an elliptical long hole having a connecting portion provided in an operation lever; a protrusion protruding from a lock plate and disposed at one end of the long hole; an operation lever and a lock plate; And the urging means for urging so that the protrusion is positioned at one end of the elongated hole, the operation lever can be operated by the urging means in normal times, The lock mechanism can be unlocked.

  In addition, the malfunction prevention means is provided when the connecting portion, the notch recess provided in the operating lever, and the protruding portion of the lock plate protruding from the upper rail move from one end portion of the long hole of the operating lever to the other end portion. Since there is a stopper convex part that fits into the notch recess, the protrusion moves in the long hole at the connecting part when an impact from the rear is applied to the seat body, and the notch recess and the The stopper convex part fits. The engagement of the notch recess and the stopper protrusion prevents the operation lever from being actuated, and the lock mechanism is not unlocked when an impact is applied from the rear to the seat body.

  The embodiment will be described with reference to FIGS.

  The seat slide device 1 according to the present embodiment includes a seat body 3 that is mounted so as to be movable in the front-rear direction of the vehicle, a pair of upper rails 5 that are fixed to the seat body 3 along the front-rear direction, and a slide with the upper rail 5. Each of the upper rails 5 includes a pair of lower rails 7 provided in the vehicle in the front-rear direction and a lock hole 11 that engages with a lock tooth 9 as a lock portion formed in each lower rail 7. A lock plate 13 that is pivotally supported by the actuator, and an operation lever 17 that is connected to the lock plate 13 by a connecting portion 15. The lock mechanism controls the movement of the seat body 3 by the lock teeth 9 and the lock holes 11. 19 is formed. The operation lever 17 and each upper rail 5 and the connecting portion 15 are provided with a malfunction prevention means 21 that prevents the lock mechanism 19 from unlocking when the operation lever 17 is actuated by a rear impact on the seat body 3. ing.

  The seat slide device 1 has a structure on one side of the left and right sides, and as shown in FIGS. 1 to 4, the seat body 3 is mounted on a vehicle floor F so as to be movable in the front-rear direction of the vehicle. . Upper rails 5 are fixed on both sides of the lower side of the seat body 3 along the front-rear direction. The upper rail 5 is formed by overlapping two plates having a substantially L-shaped cross section to form a substantially inverted T-shaped cross section, and both lower end portions are bent upward to form engaging portions 23 and 23. ing. Further, a stopper convex portion 25 is formed on the side surface portion of the upper rail 5. Further, a lower rail 7 is provided below the upper rail 5 so as to be slidable with the upper rail 5.

  The lower rail 7 is fixed on the floor F of the vehicle at a position corresponding to the upper upper rail 5. The lower rail 7 is bent inward at the center upper side on both sides of a plate having a substantially U-shaped cross section, and is further bent downward to form a lock tooth 9. A lock hole 11 of the lock plate 13 is engaged with the lock tooth 9.

  The base end portion of the lock plate 13 is rotatably supported on the side surface portion of the upper rail 5 via the pivot 27. Further, the lock plate 13 has a free end protruding from the notch formed in the upper rail 5 to the opposite side, and a lock hole 11 that engages with the lock teeth 9 of the lower rail 7 is formed. The lock hole 11 and the lock teeth 9 of the lower rail 7 constitute a lock mechanism 19, and the lock plate 13 is urged in the lock direction of the lock mechanism 19 by a return spring 14 provided between the upper rail 5 and the lock plate 13. Has been. The lock mechanism 19 regulates the positioning and movement of the seat body 3 in the front-rear direction. Further, a protrusion 29 made of, for example, a pin is provided on the side surface of the lock plate 13. The lock plate 13 is integrally formed with an operation lever holding portion 30 extending in a direction perpendicular to the sliding direction of the sheet itself, and the lock plate 13 and the lock plate 13 are connected via the operation lever holding portion 30 and the protrusion 29. The operation lever 17 is connected.

  The operation lever 17 is bent in a substantially U shape, and the operation portion 31 is bent toward the sheet main body 3 side. In addition, elliptical long holes 33 are formed on both end sides of the operation lever 17. A protrusion 29 of the lock plate 13 is disposed on one side of the long hole 33. Further, an urging means 35 is provided between the operation lever 17 and the lock plate 13. The urging means 35 urges the operation lever 17 and the lock plate 13 so that the protrusion 29 is positioned on one side of the long hole 33. The urging means 35, the long hole 33, and the protrusion 29 constitute a connecting portion 15, and the operating lever 17 and the lock plates 13 on both sides are connected via the connecting portion 15. In addition, notch recesses 37 are formed at both ends of the operation lever 17. The notch recess 37 is provided with the protrusion 29 of the lock plate 13 by an inertial force acting on the operation lever 17 due to an impact such as a load in the luggage compartment located behind the seat collides with the seat body 3 from the rear during sudden braking. When it moves from one side of the long hole 33 to the other side against the urging force of the urging means 35, it engages with the stopper convex portion 25 of the upper rail 5. The notch concave portion 37, the stopper convex portion 25, and the connecting portion 15 constitute the malfunction prevention means 21.

  The seat slide device 1 configured as described above raises the operation portion 31 of the operation lever 17 when the seat body 3 is moved in the front-rear direction. By the lifting operation of the operation lever 17, the lock plate 13 connected to the operation lever 17 rotates downward about the pivot 27. By the downward movement of the lock plate 13, the engagement between the lock teeth 9 of the lock mechanism 19 and the lock hole 11 is released, and the seat body 3 can be moved. A return spring 14 is provided between the upper rail 5 and the lock plate 13 by releasing the operation lever 17 so as to urge the lock plate 13 in the locking direction. Therefore, the lock plate 13 is moved upward by the return spring 14. , The lock teeth 9 of the lock mechanism 19 and the lock holes 11 are engaged, and the seat body 3 is held at a predetermined position.

  Here, in the seat slide device 1 configured as described above, the load in the luggage compartment located behind the seat at the time of sudden braking will move backward to the operation lever 17 due to an impact such as a collision with the seat body 3 from behind. Inertia force is applied. As the operation lever 17 moves rearward, the operation portion 31 of the operation lever 17 is bent upward, so that the operation lever 17 tends to rotate upward. When the operation lever 17 is turned upward, the engagement between the lock teeth 9 of the lock mechanism 19 and the lock hole 11 is disengaged, and the seat body 3 may move.

  Therefore, in the seat slide device 1, the operation lever lock structure that prevents the operation lever 17 from being actuated by an impact from behind on the seat body 3 is provided with a malfunction prevention means by the notch recess 37, the stopper protrusion 25, and the connecting portion 15. 21 is configured. In this malfunction prevention means 21, when the operation lever 17 moves rearward due to an impact from the rear on the seat body 3, the projection 29 is moved from one side of the elongated hole 33 to the other side (rightward direction in FIG. 3). ) And the notch recessed part 37 and the stopper convex part 25 fit simultaneously with the protrusion 29 being located in the other side of the long hole 33. FIG. By fitting the notch recess 37 and the stopper protrusion 25, the upward rotation of the operation lever 17 is restricted, and the operation lever 17 is not actuated by an impact on the seat body 3 from the rear. Therefore, the malfunction prevention means 21 prevents the operation lever 17 from being actuated by a rear impact on the seat body 3, prevents the lock mechanism 19 from being unlocked, and prevents the seat body 3 from moving. The operation lever 17 is urged by the urging means 35, and in a normal state, the operation lever 17 can be operated without the notch recess 37 and the stopper projection 25 being fitted.

  In such an operation lever lock structure of the seat slide device 1, since the malfunction prevention means 21 is provided by the operation lever 17, the upper rail 5, and the connecting portion 15, the luggage in the luggage compartment located behind the seat at the time of sudden braking. Even if the operation lever 17 tries to operate due to an inertial force caused by an impact such as a collision with the seat body 3 from behind, the operation lever 17 is prevented from being operated by the malfunction prevention means 21 and the lock mechanism 19 is unlocked. There is no. For this reason, the seat main body 3 does not move due to an impact from behind on the seat main body 3, and the safety of the passenger can be improved.

  The connecting portion 15 has an elliptical long hole 33 provided in the operation lever 17, a protrusion 29 that protrudes from the lock plate 13 and is disposed at one end of the long hole 33, the operation lever 17, and the lock plate 13 and the urging means 35 that urges the projection 29 so as to be positioned at one end of the long hole. The lock mechanism 19 can be unlocked.

  Further, the malfunction prevention means 21 is provided when the connecting portion 15, the notch recess 37 provided in the operation lever 17, and the protruding portion 29 projecting from the upper rail 5 are moved from one end portion of the elongated hole 33 to the other end portion. Therefore, when the impact from the rear of the sheet body 3 is applied, the projection 29 moves in the long hole 33 in the connecting portion 15, and this movement Accordingly, the notch recess 37 and the stopper protrusion 25 are fitted. The engagement of the notch recess 37 and the stopper protrusion 25 prevents the operation lever 17 from being actuated, and the lock mechanism 19 is not unlocked when an impact is applied to the seat body 3 from the rear.

It is a side view of the seat slide device of this embodiment. It is a principal part front view of the seat slide apparatus of this embodiment. It is a principal part side view of the seat slide apparatus in the normal time of this embodiment. It is a principal part side view of a seat slide device when the impact from the back to the seat main part of this embodiment is added.

Explanation of symbols

F ... Floor 1 ... Seat slide device 3 ... Seat body 5 ... Upper rail 7 ... Lower rail 9 ... Lock tooth 11 ... Lock hole 13 ... Lock plate 15 ... Connection part 17 ... Operation lever 19 ... Lock mechanism 21 ... Malfunction prevention means 25 ... Stopper convex part 29 ... Projection part 33 ... Long hole 35 ... Biasing means 37 ... Notch concave part

Claims (2)

A seat main body mounted movably in the front-rear direction of the vehicle, an upper rail fixed to the seat main body in the front-rear direction, and a lower rail that is slidable with the upper rail and provided in the front-rear direction of the vehicle And a lock plate that engages with a lock portion formed on the lower rail, a lock plate that is rotatably supported by the upper rail, and an operation lever that is connected to the lock plate by a connecting portion, A lock mechanism for restricting movement of the seat body is formed by the lock portion and the lock hole, and the lock mechanism is unlocked by operating the operation lever.
The operation lever and the upper rail are provided with malfunction prevention means for preventing the lock mechanism from being unlocked by the operation lever being actuated by a rear impact on the seat body. Seat slide device. The seat slide device according to claim 1,
The connecting portion includes an elliptical long hole provided in the operation lever, a protrusion protruding from the lock plate and disposed at one end of the long hole, and the operation lever and the lock plate. An urging means for urging so that the protrusion is positioned at one end of the elongated hole,
The malfunction prevention means includes the connecting portion, a notch recess provided in the operation lever, and the notch when projecting from the one end of the elongated hole and protruding from the upper rail. A seat slide device having a stopper convex portion that fits into the concave portion.

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