JP2009262799A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat capable of preventing a seat cushion from substantially sliding due to external weight even though the external weight is added to a vehicle when the seat cushion is slid in a longitudinal direction. <P>SOLUTION: The vehicular seat is assembled such that the seat cushion 1 can slide in the longitudinal direction of a vehicle floor F via a longitudinal slide mechanism 50. The longitudinal slide mechanism 50 includes a lower rail 52 and an upper rail 54 assembled so as to slide with respect to the lower rail 52, and is equipped with a first longitudinal slide lock device for locking the upper rail 54 at a desired slide position with respect to the lower rail 52. The vehicular seat is equipped with a second longitudinal slide lock device for locking the upper rail 54 with respect to the lower rail 52 with an inertial force when the first longitudinal slide lock device is unlocked, and the external weight is added to the vehicle. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat, and more particularly, to a vehicle seat that includes a seat cushion and a seat back, and the seat cushion is slidably assembled in a front-rear direction of a vehicle floor via a front-rear slide mechanism.

As this type of vehicle seat, for example, the technique disclosed in Patent Document 1 is already known. In this technique, a vehicle seat is assembled such that its seat cushion is slidable in the front-rear direction of the vehicle floor via a front-rear slide mechanism. When an external load is applied to the vehicle (for example, when a rear collision occurs in the vehicle), the entire vehicle seat is moved backward. Thereby, the impact which arises by external load can be absorbed.
JP 2005-193721 A

  However, in the above-described vehicle seat, when an external load is applied to the vehicle when the seat cushion is slid in the front-rear direction, that is, when the seat cushion is in a free state with respect to the vehicle floor, an external load is applied to the vehicle. And the problem that the seat cushion slides largely by the external load occurred.

  The present invention is intended to solve such a problem. The purpose of the present invention is to increase the seat cushion by external load even when external load is applied to the vehicle when the seat cushion is slid in the front-rear direction. It is an object to provide a vehicle seat that can be prevented from sliding.

The present invention is for achieving the above object, and is configured as follows. The invention according to claim 1 is a vehicle seat comprising a seat cushion and a seat back, wherein the seat cushion is assembled so as to be slidable in the front-rear direction of the vehicle floor via the front-rear slide mechanism. Is composed of a lower rail assembled on the vehicle floor side and an upper rail assembled on the seat cushion side so as to be slidable with respect to the lower rail, and the first front and rear locking the upper rail with respect to the lower rail at a desired sliding position. A slide lock device is provided, and when an external load is applied to the vehicle when the first front / rear slide lock device is in an unlocked state, a second front / rear slide lock device is provided that locks the upper rail with respect to the lower rail by inertial force. It is characterized by.
According to this configuration, even when an external load is applied to the vehicle while the seat cushion is slid in the front-rear direction, the seat cushion can be prevented from sliding largely back and forth due to the external load.

The invention according to claim 2 is the vehicle seat according to claim 1, wherein the second front and rear slide lock device includes a damper having a viscous member, and this viscosity is applied to the lower rail. On the other hand, the upper rail is locked.
According to this configuration, when the seat cushion slides back and forth due to external load, the slide can be attenuated. Therefore, the impact load when the slide stops can be released gently.

The invention according to claim 3 is the vehicle seat according to any one of claims 1 to 2, comprising a left-right slide mechanism that slides the seat cushion in the left-right direction of the vehicle floor, The left / right slide mechanism is composed of a lower rail assembled on the vehicle floor side and an upper rail assembled on the seat cushion side so as to be slidable with respect to the lower rail, and locks the upper rail at a desired slide position with respect to the lower rail. A second left and right slide lock device that locks the upper rail with respect to the lower rail by an inertial force when an external load is applied to the vehicle when the first left and right slide lock device is in an unlocked state. A device is provided.
According to this configuration, even when an external load is applied to the vehicle when the seat cushion is slid in the left-right direction, the seat cushion can be prevented from sliding significantly left and right due to the external load.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing a main part of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a schematic side view showing the assembled state of FIG. FIG. 3 is a schematic diagram in plan view showing the assembled state of FIG. 1. In the following description, the terms “up”, “down”, “front”, “rear”, “left” and “right” refer to the directions of “up”, “down”, “front”, “rear”, “left” and “right” described in the above-described drawings. When up, down, front, back, left, right are shown.

  First, a vehicle seat according to an embodiment of the present invention will be described with reference to FIG. As an example of this vehicle seat, a passenger seat assembled in a vehicle will be described as an example. The passenger seat includes a seat cushion 1 that serves as a seating part for the occupant, a known seat back 2 that can be tilted with respect to the seat cushion 1 (both not shown in FIG. 1), It is mainly composed of a known headrest (not shown) that supports the back of the occupant seated on the seat cushion 1 by being assembled to the top of the seat back 2. Below, the detailed structure of the seat cushion 1 is demonstrated among these structural members.

  The seat cushion 1 is mainly composed of a pair of left and right cushion frames constituting the skeleton, and pad members (both not shown in FIG. 1) attached to both the cushion frames in a covering manner. Of the constituent members of the seat cushion 1, both cushion frames are assembled to the vehicle floor F via the left / right slide mechanism 20 and the front / rear slide mechanism 50. Below, the detailed structure of these both slide mechanisms 20 and 50 is demonstrated separately.

  First, the left / right slide mechanism 20 will be described. The left / right slide mechanism 20 includes a pair of front and rear lower rails 22 and 22 and a pair of front and rear upper rails 24 and 24 that can slide with respect to the lower rails 22 and 22. Of the upper rails 24, the left and right end portions of the front upper rail 24 are respectively fixed to the front end portions of both cushion frames. Similarly, the left and right end portions of the rear upper rail 24 are also fixed to the rear end portions of both cushion frames. Thereby, the seat cushion 1, that is, the passenger seat, can be slid in the left-right direction of the vehicle floor F.

  The left / right slide mechanism 20 is provided with a first front / rear slide lock device (not shown). The first front / rear slide locking device is a device that locks both upper rails 24 at both sliding positions with respect to both lower rails 22. Thereby, the seat cushion 1 (passenger seat) can be held at the slide position desired by the passenger. Therefore, it is possible to prevent the seat cushion 1 (passenger seat) from sliding carelessly.

  Further, the left / right slide mechanism 20 is provided with a second left / right slide lock device 30. The second left / right slide lock device 30 includes a stud 32 and a hook 34. Hereinafter, each of these structural members 32 and 34 will be described in detail. First, the stud 32 will be described. The stud 32 is a plate member in which a plurality of (seven in FIG. 1) pins 32 a are protruded along the left-right direction, and is fixed to the upper surface of the front upper rail 24. Note that the plurality of pins 32a of the stud 32 are set so that a hooking portion 34a of a hook 34, which will be described later, can be engaged when the seat cushion 1 slides to any position in the left and right sliding range.

  Next, the hook 34 will be described. As described above, the hook 34 is a hook member in which the hook portion 34a capable of engaging with the pin 32a of the stud 32 is formed, and is attached to the assembly bracket 36 fixed to the front surface of the front lower rail 22 via the pin 38. It is pivotally attached. At this time, the hook 34 is biased by the torsion spring 40 in the direction opposite to the direction in which the hook 34a engages with the pin 32a of the stud 32 (counterclockwise direction in FIG. 3).

  The second left and right slide lock device 30 configured as described above is not only provided on the front lower rail 22 and the upper rail 24 as described above, but also on the rear lower rail 22 and the upper rail 24 in the longitudinal direction. It is prepared to become.

  Next, the front / rear slide mechanism 50 will be described. The front / rear slide mechanism 50 includes a pair of left and right lower rails 52 and 52 and a pair of left and right upper rails 54 and 54 that can slide relative to the lower rails 52 and 52. Of the lower rails 52, the front and rear end portions of the left lower rail 52 are respectively fixed to the vehicle floor F via legs. Similarly, the front and rear end portions of the right lower rail 52 are also fixed to the vehicle floor F via legs. In addition, a plurality of engagement holes 52a capable of meshing with a gear 66c formed in a disk damper 66, which will be described later, are formed on the bottom surface of the left lower rail 52 among the lower rails 52.

  Of the upper rails 54, the left upper rail 54 is fixed to the left end portions of the lower rails 22 of the left and right slide mechanism 20 via an assembly bracket 26 formed in a substantially U shape. Similarly, the right upper rail 54 is also fixed to the right ends of the lower rails 22 of the left and right slide mechanism 20 via an assembly bracket 26 formed in a substantially U shape. Thereby, the seat cushion 1, that is, the passenger seat, can be slid in the front-rear direction of the vehicle floor F.

  The front / rear slide mechanism 50 includes a first front / rear slide lock device (not shown). The first front / rear slide locking device is a device that locks both upper rails 54 at both sliding positions with respect to both lower rails 52. Thereby, the seat cushion 1 (passenger seat) can be held at the slide position desired by the passenger. Therefore, it is possible to prevent the seat cushion 1 (passenger seat) from sliding carelessly.

  The front / rear slide mechanism 50 includes a second front / rear slide lock device 60. The second front / rear slide lock device 60 includes a first gear link plate 62, a second gear link plate 64, a disk damper 66, and a weight 68.

  The first gear link plate 62 and the second gear link plate 64 are plate members formed in a substantially L shape, respectively. These two gear link plates 62 and 64 are connected to the front end portion of the upper rail 54 by pins 72. It is pivotally attached to the left and right sides. Further, the front end portions of the two gear link plates 62 and 64 are assembled in such a manner that the disc damper 66 is sandwiched via the pins 74.

  The disk damper 66 will be described in detail. The disk damper 66 is a damper member that includes an inner ring 66a and an outer ring 66b that can slide with respect to the inner ring 66a. A viscous member (not shown) having viscosity is provided between the outer peripheral surface of the inner ring 66a and the inner peripheral surface of the outer ring 66b. A plurality of gears 66c are formed on the outer peripheral surface of the outer ring 66b. The disk damper 66 configured in this manner is assembled to both the gear link plates 62 and 64 so that the inner ring 66a is fixed to the front end portions of the both gear link plates 62 and 64 via the pins 74.

  Further, the weights 68 are assembled so as to be sandwiched between the upper portions of the gear link plates 62 and 64 via pins 76. Thus, both the gear link plates 62 and 64 can be held in the backward-tilting direction in a state where no external load is applied to the vehicle (for example, an impact when a rear-end collision occurs in the vehicle), and the vehicle is externally loaded. Both gear link plates 62 and 64 can be rotated in the forward tilt direction by an inertial force when an impact is applied (for example, an impact when a rear-end collision occurs in the vehicle).

  The upper end of the first gear link plate 62 is engaged with the hook 34. Further, the second gear link plate 64 is in a state where the upper end side thereof is urged rearward. That is, the upper end side of the second gear link plate 64 is hooked on one end side of the tension spring 70, and the pin 26 a formed on the assembly bracket 26 is hooked on the other end side of the tension spring 70.

  The second front / rear slide lock device 60 configured in this way is provided so as to be symmetrical not only at the front end portion of the left upper rail 54 but also at the rear end portion thereof as described above.

  Then, the effect | action of the vehicle seat which consists of the structure mentioned above is demonstrated. First, with reference to FIG. 2, the case where an external load is applied to the vehicle when the seat cushion 1 is slid back and forth will be described. As an example of the external weighting, for example, a case where a rear collision occurs in the vehicle and a case where a rear collision occurs in the vehicle will be described. First, a case where a rear-end collision occurs in the vehicle will be described. When a rear-end collision occurs in the vehicle, the seat cushion 1 slides toward the front side due to inertial force. In addition, due to this inertial force, the front gear link plates 62 and 64 of the front and rear gear link plates 62 and 64 also rotate in the forward tilt direction against the urging force of the tension spring 70.

  Then, the disk damper 66 advances while rolling on the bottom surface of the lower rail 52. At this time, a resistance is generated between the inner ring 66a and the outer ring 66b by the viscous member of the disk damper 66, so that the slide of the seat cushion 1 can be attenuated by this resistance. Eventually, the gear 66c of the disk damper 66 meshes with the engagement hole 52a of the lower rail 52, and the sliding of the seat cushion 1 to the front side is stopped by this meshing (in FIG. 2, the imaginary line indicates the meshed state).

  Thus, even when a rear-end collision occurs in the vehicle when the seat cushion 1 is slid back and forth, it is possible to prevent the seat cushion 1 from sliding greatly forward due to the rear-end collision. Note that when the inertial force no longer acts, the rotation of the two gear link plates 62 and 64 is returned by the biasing force of the tension spring 40.

  Next, a case where a rear collision occurs in the vehicle will be described. When a rear collision occurs in the vehicle, the reverse of the above-described case of the rear collision, the seat cushion 1 slides toward the rear side due to inertial force. Further, due to this inertial force, of the gear link plates 62, 64, the rear side gear link plates 62, 64 are rotated in the backward tilting direction against the urging force of the tension spring 40. Thereby, it is possible to prevent the seat cushion 1 from largely sliding to the rear side due to the rear collision, as in the case of the rear collision described above.

  Subsequently, a case where an external load is applied to the vehicle when the seat cushion 1 is slid left and right will be described with reference to FIG. In addition, as an example of this external load, when the external load is applied to the vehicle when the seat cushion 1 is slid back and forth, a rear collision occurs in the vehicle and a rear collision occurs in the vehicle. Each case will be described. First, a case where a rear-end collision occurs in the vehicle will be described. Also in this case, when a rear-end collision occurs in the vehicle, the seat cushion 1 slides toward either the left or right side by the impact force due to the rear-end collision as in the case where the rear-end collision described above occurs. Further, due to the inertial force, the front gear link plates 62 and 64 of the front and rear gear link plates 62 and 64 also rotate in the forward tilt direction against the urging force of the tension spring 40.

  Then, the front hook 34 of both hooks 34 rotates in the direction in which the hook 34 a engages with the pin 32 a of the stud 32. As a result, the hook portion 34a of the hook 34 engages with one of the pins 32a of the stud 32, and the sliding of the seat cushion 1 is stopped by this engagement (in FIG. 3, the imaginary line indicates the engaged state). ).

  Thus, even when a rear-end collision occurs in the vehicle when the seat cushion 1 is slid left and right, it is possible to prevent the seat cushion 1 from sliding greatly left and right due to the rear-end collision. Note that when the inertial force no longer acts, the rotation of the two gear link plates 62 and 64 is returned by the biasing force of the tension spring 40.

  Next, a case where a rear collision occurs in the vehicle will be described. When a rear collision occurs in the vehicle, the seat cushion 1 slides toward the left or right side by the inertial force, as in the case of the rear collision described above. Further, due to the inertial force, of the front and rear gear link plates 62, 64, the rear side gear link plates 62, 64 also rotate in the rearward tilt direction against the biasing force of the tension spring 40. As a result, as in the case of the rear-end collision described above, the seat cushion 1 can be prevented from sliding greatly toward either the left or right side due to the rear collision.

  The vehicle seat according to the embodiment of the present invention is configured as described above. According to this configuration, even when an external load is applied to the vehicle while the seat cushion 1 is slid in the front-rear direction, the seat cushion 1 can be prevented from sliding greatly in the front-rear direction due to the external load.

  Moreover, according to this structure, when the seat cushion 1 slides back and forth by an external load, the slide can be attenuated. Therefore, the impact load when the slide stops can be released gently.

  Further, according to this configuration, even when an external load is applied to the vehicle when the seat cushion 1 is slid in the left-right direction, the seat cushion 1 can be prevented from sliding greatly to the left and right due to the external load.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, as an example of the vehicle seat, the passenger seat assembled in the vehicle has been described as an example. However, the seat is not limited to this, and any seat may be used as long as it is a seat (for example, a driver seat or a rear seat) that is assembled in the vehicle.

FIG. 1 is an exploded perspective view showing a main part of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a schematic side view showing the assembled state of FIG. FIG. 3 is a schematic diagram in plan view showing the assembled state of FIG. 1.

Explanation of symbols

20 Left-right slide mechanism 22 Lower rail 24 Upper rail 30 Second left-right slide lock device 50 Front-rear slide mechanism 52 Lower rail 54 Upper rail 60 Second front-rear slide lock device 66 Disc damper (damper)
F Vehicle floor

Claims (3)

A vehicle seat comprising a seat cushion and a seat back, wherein the seat cushion is slidably assembled in the front-rear direction of the vehicle floor via a front-rear slide mechanism,
The front / rear slide mechanism is composed of a lower rail assembled on the vehicle floor side and an upper rail assembled on the seat cushion side so as to be slidable with respect to the lower rail, and locks the upper rail at a desired slide position with respect to the lower rail. 1 front and rear slide lock device,
A vehicle comprising: a second front / rear slide lock device that locks the upper rail with respect to the lower rail by an inertia force when an external load is applied to the vehicle when the first front / rear slide lock device is in an unlocked state. Sheet. The vehicle seat according to claim 1,
The second front / rear slide lock device includes a damper having a viscous member, and the upper rail is locked to the lower rail by applying the viscosity to the vehicle seat. The vehicle seat according to any one of claims 1 and 2,
It has a left / right sliding mechanism that slides the seat cushion in the left / right direction of the vehicle floor
The left / right slide mechanism is composed of a lower rail assembled on the vehicle floor side and an upper rail assembled on the seat cushion side so as to be slidable with respect to the lower rail, and locks the upper rail at a desired slide position with respect to the lower rail. 1 left and right slide lock device,
A vehicle comprising a second left and right slide lock device that locks the upper rail with respect to the lower rail by an inertia force when an external load is applied to the vehicle when the first left and right slide lock device is in an unlocked state. Sheet.

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