JP2013095355A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat configure to prevent a malfunction of an anti-sagging mechanism even while the anti-sagging mechanism receives a magnetic force from other members.SOLUTION: A vehicle seat 1 comprises anti-sagging mechanisms 4, 20 for preventing a cushion frame 10 from sagging toward a floor F due to a sinking load of an occupant M toward a seat back 3 when a rear-side collision occurs in a vehicle. The anti-sagging mechanism 4, 20 include a link rod 20 which is assembled to the cushion frame 10 of a seat cushion 2 to be rotatable about a widthwise axis, and pressure-receiving device 4 assembled in the seat back 3 to pull a cable 60 connected to the link rod 20 by the sinking load of the occupant M toward the seat back 3 when the rear-side collision occurs in the vehicle. The cable 60 pulled by the pressure receiving device 4 turns the link rod 20 so as to be locked in a gap S between the side of the floor F and the cushion frame 10.

Description

  The present invention relates to a vehicle seat, and more particularly, to a vehicle having a drop prevention mechanism that prevents a cushion frame from falling to the floor side due to a sinking load on a passenger's seat back when a rear collision occurs in the vehicle. Regarding the sheet.

  2. Description of the Related Art Conventionally, there is already known a vehicle seat that includes a seat cushion and a seat back and in which a cushion frame can be moved up and down via parallel links that are paired on the left and right with respect to the floor side. In such a vehicle seat, for example, even if a brake that locks the movement of the parallel link is worn, the cushion frame is on the floor side due to the sinking load on the seat back of the occupant when a rear collision occurs in the vehicle. A drop prevention mechanism is provided for preventing the drop. Here, Patent Document 1 below discloses a drop prevention mechanism that locks the movement of a link by inertia force and magnetic force when a rear collision occurs in a vehicle. Thereby, it can prevent reliably that a cushion frame falls to the floor side.

JP 2010-52609 A

  However, in the technique of Patent Document 1 described above, the drop-in prevention mechanism is configured by using an inertial force and a magnetic force when a rear collision occurs in the vehicle. For this reason, if the drop prevention mechanism receives magnetic force from other members (members other than the members constituting the drop prevention mechanism), a malfunction of the drop prevention mechanism may occur. I couldn't do it).

  SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and an object of the present invention is to provide a vehicle seat that does not cause a malfunction of the drop prevention mechanism even when the drop prevention mechanism receives a magnetic force from another member. Is to provide.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 includes a seat cushion and a seat back, the cushion frame can be raised and lowered via a link to the floor side, and a passenger seat back when a rear collision occurs in the vehicle The vehicle seat is provided with a drop prevention mechanism that prevents the cushion frame from falling to the floor side due to a sinking load on the floor, and the drop prevention mechanism has an axial direction in the width direction with respect to the cushion frame of the seat cushion. A link rod assembled to be pivotable about the axis to be connected, and a cable that is assembled to the interior of the seat back and connected to the link rod by the sinking load on the passenger's seat back when a rear collision occurs in the vehicle The pressure receiving device is capable of pulling the cable, and when the cable is pulled by the pressure receiving device, the pulled cable is A construction which is characterized in that pivoting the link rod to lunge into the gap between the lower side and the cushion frame.
According to this configuration, when a rear collision occurs in the vehicle, the link rod can be stuck in the gap between the floor side and the cushion frame. Therefore, like the prior art, the cushion frame can be reliably prevented from falling to the floor side. If this can be prevented, unlike the prior art, there is no need to use magnetic force. For example, even if the drop prevention mechanism (pressure receiving device and link rod) receives magnetic force from other members, the cushion frame Can be reliably prevented from falling to the floor side. That is, it is possible to prevent malfunction of the drop prevention mechanism.

In addition, the invention according to claim 2 is the vehicle seat according to claim 1, wherein even if the pressure receiving device rotates the link bar excessively on the floor side, the link bar is rotated. Is formed with a stopper for preventing it from being released from the state of being stuck in the gap between the floor side and the cushion frame.
According to this configuration, when the link rod rotates, the rotated link rod does not rotate beyond the state where it is stuck in the gap between the floor side and the cushion frame. Therefore, it is possible to prevent the swinging of the link rod. Therefore, it can prevent more reliably that a cushion frame falls to the floor side. That is, the malfunction of the drop prevention mechanism can be further prevented.

FIG. 1 is a perspective view showing an internal structure of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view showing the pressure receiving device of FIG. FIG. 3 is a schematic side view of the pressure receiving device of FIG. FIG. 4 is a schematic side view of the vehicle seat in FIG. 1 and shows a state before a rear collision occurs in the vehicle. FIG. 5 shows a state after a rear collision occurs in the vehicle in FIG.

  Hereinafter, the form for implementing this invention is demonstrated using FIGS. First, a vehicle seat 1 according to an embodiment of the present invention will be described. In the following description, “driver's seat 1” will be described as an example of “vehicle seat”. In the following description, the terms “up”, “down”, “front”, “back”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “back”, “left”, and “right” described in the above-described drawings. When up, down, front, back, left, right are shown.

  As shown in FIG. 1, the driver's seat 1 mainly includes a seat cushion 2 and a seat back 3. Hereinafter, the seat cushion 2 and the seat back 3 will be described individually.

  First, the seat cushion 2 will be described. The seat cushion 2 includes a cushion frame 10, a seat cushion pad (not shown) that is assembled so as to wrap the cushion frame 10, and a skin (not shown) that covers the surface of the seat cushion pad. Yes.

  The cushion frame 10 includes left and right side frames 12, 14; a front panel 16 that extends the front side of the left and right side frames 12, 14; and a rear rod 18 that extends the rear side of the left and right side frames 12, 14; Is formed in a substantially rectangular frame shape. At the rear ends of the left and right side frames 12 and 14, link rods 20 and 20 that are paired to the left and right are assembled so as to be rotatable about an axis whose axial direction is the width direction.

  At this time, the link rods 20 and 20 are biased clockwise via a torsion spring (not shown) in the left side view of the driver's seat 1. Note that this biasing is normally performed (when no rear collision occurs in the vehicle), so that the left and right side frames are formed so that the tip ends of the link rods 20 and 20 face forward (the state shown in FIG. 1). The projections 12a and 14a formed on the pins 12 and 14 are regulated.

  The link rods 20 and 20 are connected to operation cables 60 and 60 described later. Therefore, when a pulling force acts against the urging force of the torsion spring from the inner cables 64, 64 of the operation cables 60, 60, a gap S between the left and right lower rails 70, 72 and the left and right side frames 12, 14 described later. , The link rods 20 and 20 can be rotated so as to stick to S. The seat cushion 2 is configured in this way.

  Next, the seat back 3 will be described. The seat back 3 includes a back frame 30, a seat back pad (not shown) that is assembled so as to wrap the back frame 30, and a skin (not shown) that covers the surface of the seat back pad. Yes.

  The back frame 30 includes left and right side frames 32, 34, an upper frame 36 that extends over the upper sides of the left and right side frames 32, 34, and a lower panel 38 that extends under the left and right side frames 32, 34. Is formed in a substantially rectangular frame shape. The pressure receiving device 4 is assembled to the lower panel 38 of the back frame 30 formed in this way.

  The pressure receiving device 4 will be described in detail with reference to FIGS. 1 to 3, particularly with reference to FIGS. 2 to 3. The pressure receiving device 4 is mainly assembled to the base bracket 40 and the base bracket 40. The two links 42 and 44 (the first link 42 and the second link 44) and the pressure receiving plate 52 are configured.

  The base bracket 40 is a support member formed in a groove shape having side walls 40a and 40a. The base bracket 40 is fastened to the lower panel 38 so that the longitudinal direction thereof faces the vertical direction. The two links 42 and 44 are pulling members that pull inner cables 64 and 64 of operation cables 60 and 60, which will be described later, due to a sinking load of the occupant M on the seat back 3 when a rear collision occurs in the vehicle. is there.

  Of the two links 42, 44, the first link 42 is preferentially pivoted at one end via a fixed shaft 46 having a fixed roller 46a to the lower portion of the side wall 40a, 40a of the base bracket 40. It is assembled with. On the other hand, of the two links 42 and 44, the second link 44 has a movable roller 50a with respect to the long holes 40b and 40b, one end of which is formed in the upper part of the side walls 40a and 40a of the base bracket 40. It is assembled in such a manner that it is inserted through the movable shaft 50.

  The first link 42 and the second link 44 are assembled in such a manner that the other ends thereof are pivotally attached via a pressure receiving shaft 48 having a pressure receiving roller 48a. The pressure receiving plate 52 is a transmission member formed so as to be able to transmit a sinking load of the occupant M to the seat back 3 when a rear collision occurs in the vehicle to the pressure receiving roller 48a. The pressure receiving plate 52 is hung on a contour mat 30a assembled to the back frame 30 via rings R and R so as to be disposed in front of the pressure receiving roller 48a (see FIG. 1).

  The pressure receiving device 4 includes the base bracket 40, two links 42 and 44 (first link 42 and second link 44), and a pressure receiving plate 52. The pressure receiving device 4 thus configured and the pair of link rods 20 and 20 are connected to each other via operation cables 60 and 60, respectively.

  The pressure receiving device 4 and the pair of link rods 20 and 20 correspond to a “falling prevention mechanism” described in the claims. The operation cable 60 includes an outer cable 62 formed in a cylindrical shape and an inner cable 64 formed in a wire shape so as to be movable in the outer cable 62.

  Hereinafter, the connection of the operation cables 60 and 60 will be described in detail. Since the connection of the operation cables 60 and 60 is targeted to the left and right, the connection of the right operation cable 60 will be omitted by describing the connection of the left operation cable 60. One end of the outer cable 62 of the left operation cable 60 is hooked to the base bracket 40, and the other end is hooked to the left side frame 12 of the seat cushion 2.

  On the other hand, one end of the inner cable 64 of the left operation cable 60 is wound around the base bracket 40 by winding the front side of the fixed roller 46a, the rear side of the pressure receiving roller 48a, and the front side of the movable roller 50a (FIG. 3). The other end is hooked to the base end of the left link bar 20. The seat back 3 is configured in this way. The driver's seat 1 is composed of the seat cushion 2 and the seat back 3.

  The driver's seat 1 configured as described above returns to FIG. 1 and is fastened to the vehicle floor F via the slide device and the lifting device. This slide device is a well-known one, and is formed to be slidable with respect to the left and right lower rails 70 and 72, which are fastened to the vehicle floor F and formed to be paired on the left and right. The upper rails 74 and 76 are provided.

  The left and right lower rails 70, 72 are formed with stoppers 74 a, 76 a that can restrict the rotation of the link rods 20, 20 pulled by the inner cables 64, 64 of the operation cables 60, 60. Accordingly, the link rods 20 and 20 can be regulated so as not to rotate beyond the state where they are stuck in the gaps S and S between the left and right lower rails 70 and 72 and the left and right side frames 12 and 14. This description is described in the claims, “Even if the pressure receiving device rotates the link rod excessively on the floor side, the rotated link rod is stuck in the gap between the floor side and the cushion frame. It is equivalent to “a stopper is formed to prevent the state from being removed from”.

  On the other hand, this elevating device is also known, and is composed of parallel links 80 and 80 that are hung between the left and right side frames 12 and 14 and the left and right upper rails 74 and 76 and that are paired on the left and right. The descriptions of the parallel links 80 and 80 correspond to “links” described in the claims. The right link 80 of the left and right parallel links 80, 80 is formed with a sector gear 82 that meshes with a pinion gear (not shown) that rotates as a handle (not shown) is operated. Therefore, when the handle is operated, the left and right side frames 12, 14 can be raised and lowered with respect to the left and right upper rails 74, 76, that is, the driver's seat 1 can be raised and lowered with respect to the vehicle floor F.

  Then, with reference to FIGS. 3-5, the effect | action of the driver's seat 1 which consists of the structure mentioned above is demonstrated. As shown in FIG. 4, when a rear collision occurs in the vehicle while the occupant M is seated in the driver's seat 1, the occupant M sinks into the seat back 3 as shown in FIG. 5. Then, the pressure receiving roller 48a is pushed in via the pressure receiving plate 52 by the load of the sinking. As a result, the movable shaft 50 rises along the long holes 40b, 40b, so that the movable roller 50a pulls the inner cables 64, 64 of the operation cables 60, 60 against the biasing force of the torsion spring. .

  Therefore, the link rods 20 and 20 are rotated counterclockwise in the left side view of the driver's seat 1. When rotating in this way, the link rods 20 and 20 are caught in the gaps S and S between the left and right lower rails 70 and 72 and the left and right side frames 12 and 14. Therefore, it is possible to reliably prevent the cushion frame 10 from falling on the vehicle floor F as in the prior art.

  The driver's seat 1 according to the embodiment of the present invention is configured as described above. According to this configuration, when a rear collision occurs in the vehicle, the link rods 20 and 20 can be stuck in the gaps S and S between the left and right lower rails 70 and 72 and the left and right side frames 12 and 14. Therefore, it is possible to reliably prevent the cushion frame 10 from falling on the vehicle floor F as in the prior art. If this can be prevented, unlike the prior art, there is no need to use magnetic force. For example, the drop-preventing mechanism (the pressure receiving device 4 and the pair of link rods 20 and 20) receives magnetic force from other members. Even if it is, it can prevent reliably that the cushion frame 10 falls in the vehicle floor F. FIG. That is, it is possible to prevent malfunction of the drop prevention mechanism.

  Further, according to this configuration, when the link rods 20 and 20 are rotated, the rotated link rods 20 and 20 protrude into the gaps S and S between the left and right lower rails 70 and 72 and the left and right side frames 12 and 14. It does not rotate beyond the hung state. Therefore, it is possible to prevent the link rods 20 and 20 from swinging. Therefore, it can prevent more reliably that the cushion frame 10 falls into the vehicle floor F. FIG. That is, the malfunction of the drop prevention mechanism can be further prevented.

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, “driver's seat 1” has been described as an example of “vehicle seat”. However, the present invention is not limited to this, and “passenger seat”, “rear seat”, and the like may be used.

  In the embodiment, “parallel links 80 and 80” have been described as examples of “links”. However, the present invention is not limited to this, and any link may be used as long as it can move the driver's seat 1 up and down with respect to the vehicle floor F, such as “X link”.

1 Driver's seat (vehicle seat)
2 Seat cushion 3 Seat back 4 Pressure receiving device 10 Cushion frame 20 Link rod 60 Operation cable 74a Stopper 76a Stopper 80 Parallel link F Vehicle floor

Claims (2)

Seat cushion and seat back, and the cushion frame can be raised and lowered via a link to the floor side, and the cushion frame is caused by the sinking load on the passenger's seat back when a rear collision occurs in the vehicle A vehicle seat equipped with a drop prevention mechanism that prevents falling to the floor side,
The drop prevention mechanism
A link rod assembled to the cushion frame of the seat cushion so as to be rotatable about an axis whose axial direction is the width direction;
A pressure receiving device assembled inside the seat back and capable of pulling a cable connected to the link rod by a sinking load on the seat back of the occupant when a rear collision occurs in the vehicle,
A vehicle seat characterized in that, when a cable is pulled by a pressure receiving device, a link rod is rotated so that the pulled cable projects into a gap between a floor side and a cushion frame. The vehicle seat according to claim 1,
On the floor side, even if the pressure-receiving device rotates the link rod excessively, a stopper is formed to prevent the rotated link rod from coming out of the state where it hits the gap between the floor side and the cushion frame. A vehicle seat characterized by being made.

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