JP2010285046A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved frame structure of a vehicle seat configured to move a seating surface in a frontal collision. <P>SOLUTION: The vehicle seat is configured in such a manner that, when a collision from the front relative to the occupant occurs, the seating surface of a seating part moves. The vehicle seat includes: a base frame 30 which is supported on the seating part at a position thereof which is on the vehicle body side; a movable frame 40 which is movable relative to the base frame; a second gas cylinder 61 which is activated in a frontal collision; and a second wire 62 which transmits a driving force of the second gas cylinder 61 to the base frame 30 to thereby move the movable frame 40 relative to the base frame 30. The movable frame 40 is formed to longitudinally extend to right and left side frames 41, and includes a guide hole 41A for guiding movement of the movable frame 40, and a connecting pipe 44 mutually connecting the right and left side frames 41. Both end parts 44B of the connecting pipe 44 is connected onto the guide hole 41A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle seat such as a vehicle seat, and more particularly to a vehicle seat having a structure in which a seating surface moves in a frontal collision with respect to an occupant.

  2. Description of the Related Art A vehicle seat having a configuration in which a seating surface of a seating portion moves rearward when a vehicle collides head-on is known. For example, the vehicle seat described in Patent Document 1 discloses a configuration in which a seating surface is moved rearward by a pretensioner device (gas cylinder) having an axial center directed in the left-right direction.

  Specifically, the mounting member provided on the fixed frame (base frame) is inserted through the long mounting holes on the left and right side walls of the seat frame (movable frame) so that the movable frame is attached to the base frame. On the other hand, it can move back and forth. The gas cylinder is disposed below the front side of the movable frame, and ends of the wires extending from both ends and redirected to the rear are respectively connected to the outer surfaces of the left and right side walls of the base frame.

  When the gas cylinder is actuated and the wire is pulled at the time of a frontal collision, the base frame to which the end of the wire is connected tries to be attracted to the movable frame. (Seat surface) moves backward.

JP 2008-213546 A

  By the way, the conventional frame structure of the vehicle seat still has room for improvement from the viewpoint of compactness and simplification of the configuration. For example, in the prior art described above, since the connecting member that connects the side walls is provided after the front and rear guide holes provided on the left and right side walls of the movable frame, the movable frame becomes large in the front-rear direction. When the movable frame moves rearward, a space for accommodating the connecting member may be required, or the connecting member may interfere with the passenger in the rear seat.

  Furthermore, since the site | part or member for connecting the edge part of a wire to the base frame is provided independently, the structure of the frame may become complicated and the number of parts may increase.

  Accordingly, an object of the present invention is to provide an improved frame structure in a vehicle seat having a structure in which a seating surface moves in the event of a frontal collision.

  The vehicle seat of the present invention that solves the above-described problems is a vehicle seat configured such that a seating surface of a seating portion moves during a frontal collision with respect to an occupant, and the vehicle body of the seating portion is a vehicle body. A base frame supported on the side, a movable frame movable relative to the base frame, a driving force generating member that operates at the time of a frontal collision, and a driving force of the driving force generating member. A power transmission member that moves the movable frame relative to the base frame by transmitting between the movable frames, and the movable frame is formed to extend forward and backward on the left and right side walls of the movable frame. And a guide hole for guiding the movement of the movable frame, and a connecting member for connecting the left and right side walls of the movable frame. Characterized in that it is linked to or below the de hole.

  The vehicle seat includes a mounting member that engages with the left and right side walls of the base frame, and the mounting member is inserted into the guide hole and connected to the power transmission member. be able to.

  In each vehicle seat described above, the central portion of the connecting member may be curved in a direction away from the occupant from both ends.

  In each vehicle seat described above, the movable frame has a bulging portion that bulges upward on the guide hole, and both end portions of the connecting member are connected to the bulging portion. It can be.

  In each of the vehicle seats described above, the left and right side walls of the base frame protrude upward at a facing portion disposed so as to sandwich the left and right side walls of the movable frame, and a rear end of the facing portion, A mounting portion to which the seat back frame is attached, and the facing portion of the base frame is curved so as to be displaced outward with respect to the mounting portion when viewed from the rear.

  According to the configuration of the first aspect, since both end portions of the connecting member are connected to the upper or lower guide hole extending in the front-rear direction, the guide hole can be formed as long as possible, and the movable frame can be moved. A sufficient amount can be secured. Or since the movable frame can be shortened compared with the structure which the both ends of a connection member connect before or after a guide hole, when the movable frame moves, the amount which protrudes from a sheet | seat can be made small.

  According to the configuration of the second aspect, since the guide hole of the movable frame is inserted into the attachment member that engages with the base frame and the power transmission member is connected, the power transmission member such as a wire is connected to the base frame. It is not necessary to provide the site | part or member for doing independently. Thereby, the configuration of the base frame can be simplified and the number of parts can be reduced.

  According to the structure of Claim 3, since the center part is curving in the direction which leaves | separates from the passenger | crew who sits on a sheet | seat rather than both ends, the contact feeling to a passenger | crew can be suppressed.

  According to the configuration of the fourth aspect, since both ends of the connecting member are connected to the bulging portion provided on the guide hole, the rigidity around the guide hole can be improved, and the connecting member The mounting rigidity can be improved.

  According to the configuration of the fifth aspect, the base frame is curved so that the facing portion is displaced outward with respect to the mounting portion when viewed from the rear, so that when the movable frame moves rearward, Interference can be avoided. In addition, since the interval between the attachment portions is smaller than the interval between the opposing portions, the base frame can be made compact.

1 is an overall perspective view of a seat frame of a vehicle seat. It is a disassembled perspective view of the seating part of a seat frame. It is a schematic diagram explaining a height adjustment mechanism, when (a) the sheet is lowered and (b) when the sheet is raised. It is the figure which looked at the base frame and the movable frame from the back. It is ZZ sectional drawing of FIG. It is the figure which looked at the link connection pipe and the gas cylinder for seats from the front. It is a perspective view which shows the state which the pin engaged with the base frame, the rear link, the edge part of the 2nd wire, and the movable frame. It is a top view which shows the state which the pin engaged with the base frame, the rear link, the edge part of the 2nd wire, and the movable frame. It is a top view explaining the positional relationship of the slider of a normal state, a base frame, and a movable frame. It is a side view explaining the positional relationship of the slider, base frame, and movable frame in a normal state. It is a top view explaining the positional relationship of the slider of a state after an operation | movement, a base frame, and a movable frame. It is a side view explaining the positional relationship of the slider of a state after an operation | movement, a base frame, and a movable frame. It is the modification which has arrange | positioned the 1st gas cylinder in the left-right reverse direction.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vehicle seat as an example of the vehicle seat of the present invention is configured by covering a seat cushion made of urethane foam or the like on the outside of the seat frame 1 as shown in FIG. . The seat frame 1 includes a seat back frame 2 and a seating portion frame 3. In the present invention, front and rear, left and right, and top and bottom are based on a passenger sitting on the seat.

  As shown in FIG. 2, the seat frame 3 changes the height of the seat surface and the rail slider device 10 (mounting bracket) that supports the seat (base frame 30) on the vehicle body (an example of a vehicle body). It mainly includes a height adjustment mechanism 20, a base frame 30, a movable frame 40, a pretensioner device 50 that pulls in a seat belt at the time of a frontal collision, and a seat surface moving device 60 that moves the movable frame 40 rearward at the time of a frontal collision. Yes. The movable frame 40 (seat surface of the seating portion) is configured to move rearward relative to the base frame 30 when a frontal collision occurs. The state before the operation due to the frontal collision is referred to as a normal state, and the The state is called a post-operation state. Hereinafter, when there is no notice in particular, the structure of a normal state is demonstrated.

  The rail slider device 10 mainly has a rail 11 and a slider 15. The rail 11 has a shape extending long in the front-rear direction, and two similar ones are provided in parallel apart from each other on the left and right. Each rail 11 is fixed to a vehicle body (not shown) by a front bracket 12 and a rear bracket 13.

  The slider 15 has a shape that extends long in the front-rear direction, and is configured to be slidable relative to the rail 11. The slider 15 supports the base frame 30 on the vehicle body via the height adjustment mechanism 20.

  The height adjustment mechanism 20 includes a front link 21 and a rear link 23, and lower ends 21 </ b> A and 23 </ b> A are rotatably connected to the slider 15, and upper ends 21 </ b> B and 23 </ b> B are rotatably connected to the base frame 30. Thus, the base frame 30 can be moved up and down with respect to the slider 15 by the four-bar linkage mechanism.

Specifically, two front links 21 are provided on the left and right, and lower ends 21 </ b> A are pivotally supported by metal fittings 91 provided at the front ends of the sliders 15. The left and right front links 21 are connected by a front link connecting pipe 22 near the center of each front link 21. As a result, both the left and right front links 21 rotate simultaneously.
An upper end 21B of the front link 21 is coaxial with a dial 27 provided on the base frame 30, which will be described later, and is supported by a pin 92 (only one is shown).
Each front link 21 is rearwardly inclined so that the upper end 21B is located behind the lower end 21A.

  The front link connecting pipe 22 is curved so that a central portion 22A occupying about 70% of its length is positioned below the both end portions 22B in a normal state.

As with the front link 21, the rear link 23 has a lower end 23A that is pivotally supported by the slider 15 via a metal fitting 93, and an upper end 23B that is rotatably engaged with a base frame 30 described later (an example of an attachment member). ) Is engaged. Further, the rear link 23 is disposed to be inclined rearward so that the upper end 23B is located behind the lower end 23A, as with the front link 21.
The left and right rear links 23 are connected by a rear link connecting pipe 24 near the center of each rear link 23. Thereby, both the left and right rear links 23 rotate at the same time.
The rear link connecting pipe 24 is curved so that a central portion 24A occupying about 70% of its length is positioned below and behind the both end portions 24B in the normal state.

  The upper end 23B of the rear link 23 and the pin 94 are engaged so as not to rotate. The pin 94 engages with the lower end of the link 25 provided on the base frame 30 so as not to rotate. Specifically, for example, the pin 94 has two chamfered portions that engage with the rear link 23 and the link 25, and the rear link 23 and the link 25 are substantially the same as the two chamfered engagement portions of the pin 94. Engagement holes having the same shape and size are formed. And the pin 94, the rear link 23, and the link 25 are made non-rotatable by mutually engaging the pin 94 formed in this way and each engagement hole. As a result, the rear link 23 and the link 25 are fixed to each other by the pin 94 at an angle.

  As shown in FIGS. 3A and 3B, the upper end of the link 25 is rotatably connected to an operation link 26 extending forward, and the operation link 26 is a fan shape that rotates with respect to the base frame 30. The gear 28 is rotatably connected. The base frame 30 is provided with a dial 27 for rotating the gear, and the gear of the dial 27 and the fan-shaped gear 28 are engaged with each other. Accordingly, when the dial 27 is rotated, this rotation is transmitted to the rotation of the fan-shaped gear 28, and the rotation of the fan-shaped gear 28 rotates the link 25 via the operation link 26. Since the link 25 and the rear link 23 are fixed to each other by a pin 94, the movement of the link 25 is the rotation of the rear link 23. Since the rear link 23, the base frame 30 and the front link 21 constitute a four-bar linkage mechanism, when the rear link 23 rises forward, the front link 21 rises forward as well, and the base frame 30 Move upward. In this way, the base frame 30 can be adjusted in height up and down by forward and reverse rotation of the dial 27.

  As shown in FIG. 2, the base frame 30 mainly includes a side frame 31 that forms left and right side walls, and a connection pipe 32 that connects the left and right side frames 31 at the front ends.

  The left and right side frames 31 each have a facing portion 31A disposed so as to sandwich the left and right side frames 41 of the movable frame 40, and a mounting portion 31B protruding upward at the rear end of the facing portion 31A. Yes. As shown in FIG. 4, the facing portion 31 </ b> A is curved so as to be displaced outward with respect to the mounting portion 31 </ b> B when viewed from behind. Thereby, a space for accommodating the movable frame 40 is secured, and it is possible to avoid interference with the movable frame 40 when the movable frame 40 moves rearward.

  Returning to FIG. 2, the left and right side frames 31 (opposing portions 31 </ b> A) are rotatably engaged with pins 94 at the rear ends (see also FIGS. 7 and 8). In the present embodiment, the pin 94 is formed in a hexagonal bolt shape.

  The right side frame 31 (opposing portion 31A) is rotatably provided with a dial 27 at the front end. A lift link 43 is pivotally supported by a pin 92 on the left and right side frames 31 at a position coaxial with the dial 27. The lift link 43 is a link that lifts the movable frame 40 when the movable frame 40 moves rearward. In a normal state, the lift link 43 is inclined forward by about 45 ° with respect to the horizontal, and an upper end of the link 43 The side frame 41 is rotatably connected.

  The seat back frame 2 is attached to the attachment portion 31B (see FIG. 1). In the present embodiment, since the left and right intervals of the attachment portion 31B are smaller than the left and right intervals of the facing portion 31A, the base frame 30 and the seat back frame 2 can be made compact.

  The movable frame 40 includes a side frame 41 that forms left and right side walls, a pan frame 42 that connects the front ends of the left and right side frames 41, and a connection member as an example of a connection member that connects the rear ends of the left and right side frames 41. And a pipe 44.

  A guide hole 41A extending in the front-rear direction is formed at the rear end of each side frame 41, and the above-described pin 94 is inserted into the guide hole 41A. Thereby, when the movable frame 40 moves rearward with respect to the base frame 30, the rear end portion of the movable frame 40 moves along the direction in which the guide hole 41A extends.

  As shown in FIG. 5, the pan frame 42 is formed by pressing a sheet metal, and has a recessed portion 42 </ b> A and a protruding protrusion 42 </ b> B that are recessed from the rear as viewed from below. A hook 42H is formed on the upper surface of the portion where the concave portion 42A is located so that a part of the sheet metal is raised and the tip is directed forward. A seat spring 81 is stretched between the hook 42H and the connecting pipe 44. The front end of the seat spring 81 is located behind the upper end of the second gas cylinder 61 described later.

  As shown in FIG. 2, the connecting pipe 44 is curved so that the central portion 44A, which occupies about 70% of the length, is positioned away from the occupant, more specifically, below both ends 44B. . Each end 44B is connected to a bulging portion 41B bulging upward just above the guide hole 41A at the rear end of the side frame 41. That is, the connecting pipe 44 is located directly above the guide hole 41A. As a result, the guide hole 41A can be positioned as far back as possible, and a sufficient amount of backward movement of the movable frame 40 can be secured. Alternatively, the length of the front and rear of the side frame 41 can be shortened compared to a configuration in which the both end portions 44B are connected in front of or behind the guide hole 41A, so that the amount of protrusion from the seat when the movable frame 40 moves backward is reduced. it can.

  Further, the central portion 44A of the connection pipe 44 needs to be arranged at a predetermined height so as not to give a sense of contact to the occupant. In the present embodiment, the connection pipe 44 has both end portions 44B at the central portion 44A. The left and right side frames 41 are connected to each other at a position directly above the guide hole 41A while suppressing the feeling of hitting the occupant to ensure the rigidity of the movable frame 40. It is possible.

  Furthermore, by connecting the both end portions 44B of the connecting pipe 44 to the bulging portion 41B provided on the guide hole 41A, the rigidity around the guide hole 41A can be improved, and the mounting rigidity of the connecting pipe 44 can also be improved. . Moreover, since the enlargement in the height direction of the movable frame 40 can be suppressed as compared with the case where the connection pipe 44 is connected directly below the guide hole 41A, the increase in the height direction of the entire vehicle seat can be suppressed. Can do.

  In the present embodiment, the guide hole 41A is formed at the rear end of the side frame 41, and the connecting pipe 44 is connected to the guide hole 41A. Therefore, in the state before the movable frame 40 moves. Thus, a sufficient space can be secured for the feet of the passengers in the rear seat.

  The pretensioner device 50 includes a first gas cylinder 51, two first wires 52, two pulleys 53, a reinforcing pipe 54, and two pulleys 55.

  Similar to the pretensioner device of Patent Document 1, the first gas cylinder 51 protrudes in the axial direction from the cylinder 51A, a piston (not shown) that moves within the cylinder 51A, and from the piston to the outside of the cylinder 51A. It has a piston rod 51B and a gas generator 51C (see FIG. 5). The first gas cylinder 51 is arranged with its axis directed to the left and right. An acceleration sensor (not shown) is connected to the gas generator 51C. When a deceleration of the vehicle equal to or greater than a predetermined value is detected from the acceleration sensor, an electric signal is input to cause gas to flow into the cylinder 51A from the gas generator 51C. The supplied piston rod 51B enters the cylinder 51A, and the first gas cylinder 51 as a whole contracts in the axial direction. The cylinder 51 A of the first gas cylinder 51 is connected to the seat belt anchor 56 by a first wire 52, and the piston rod 51 B is connected to an inner buckle 57 by another first wire 52. Specifically, each of the two sliders 15 is provided with a pulley 53 that can rotate about an axis in the vertical direction via a bracket 58, and the two first wires 52 connected to the cylinder 51A and the piston rod 51B. After extending outward in the left-right direction, it is turned around by being wound around the pulley 53. In other words, the first gas cylinder 51 is provided in such a manner that it is stretched between two pulleys 53 provided on the slider 15 that is a portion that does not move back and forth during a frontal collision. In the present embodiment, the part that moves back and forth at the time of a frontal collision is the movable frame 40.

  Then, the pulleys 55 that can rotate around the axis in the left-right direction are respectively provided on the metal fittings 93 provided at the rear ends of the two sliders 15, and the first wire 52 facing rearward is wound around the pulley 55. The two first wires 52 are directed obliquely upward and forward, and anchors 56 and inner buckles 57 are respectively connected to the ends thereof.

  The left and right brackets 58 are connected by a reinforcing pipe 54. As a result, even if a strong tension is applied to the two first wires 52 and a force that causes the left and right pulleys 53 to approach each other is applied, the reinforcing pipe 54 stretches against this force, so that the left and right sliders The interval of 15 can be maintained appropriately.

The seat surface moving device 60 includes a second gas cylinder 61 as an example of a driving force generating member, two second wires 62 as an example of a power transmission member, and two pulleys 63. Similar to the first gas cylinder 51, the second gas cylinder 61 includes a cylinder 61A, a piston, a piston rod 61B, and a gas generator 61C (see FIG. 6). The second gas cylinder 61 is arranged with its axis directed to the left and right. That is, it is arranged in parallel with the first gas cylinder 51. The cylinder 61 </ b> A is a portion that does not move through the second wire 62 at the time of a frontal collision, and is connected to a pin 94 on the left side that is located behind the second gas cylinder 61. The piston rod 61 </ b> B is a portion that does not move at the time of a frontal collision via another second wire 62, and is connected to a pin 94 on the right side that is located behind the second gas cylinder 61.
The two second wires 62 extending from the cylinder 61A and the piston rod 61B are respectively wound around two pulleys 63 provided on the outer side in the left-right direction of the second gas cylinder 61, and the two rear pins 94 It is stretched toward.

  As shown in FIG. 5, the second gas cylinder 61 is disposed below the pan frame 42 so as to face the recess 42 </ b> A. Since the second gas cylinder 61 is arranged so as to face the recess 42A on the lower surface of the pan frame 42 in this way, even if the second gas cylinder 61 vibrates somewhat, it is difficult to interfere with the pan frame 42, and The second gas cylinder 61 is housed in a compact manner as close as possible to the pan frame 42. Particularly, since a part of the upper portion of the second gas cylinder 61 enters the recess 42A, the second gas cylinder 61 is housed in an extremely compact manner.

  As shown in FIG. 6, the second gas cylinder 61 is arranged so as to face the lower central portion 22 </ b> A in relation to the front link connecting pipe 22. Further, as shown in FIG. 5, the front link connecting pipe 22 is disposed above and in front of the central portion 22A. For this reason, even when the movable frame 40 moves rearward at the time of a frontal collision, the front link connecting pipe 22, the second gas cylinder 61, and the gas generator 61C protruding downward from the second gas cylinder 61 forward. Interference is suppressed.

  The positional relationship between the front link connecting pipe 22, the first gas cylinder 51, and the second gas cylinder 61 will be described. The first gas cylinder 51 is disposed behind the front link connecting pipe 22, and the second gas cylinder. 61 is arranged in front of the front link connecting pipe 22. Thereby, since three columnar members are divided and arrange | positioned before and after, the bulkiness of the height by providing these members can be suppressed.

  As shown in FIG. 2 and FIG. 9, the piston rod 51B protruding from the first gas cylinder 51 and the piston rod 61B protruding from the second gas cylinder 61 are oriented in the directions opposite to each other in the first and second directions. The gas cylinder 51 and the second gas cylinder 61 are arranged. Specifically, the first gas cylinder 51 is disposed between two pulleys 53 separated from each other on the left and right such that the cylinder 51A is closer to the right end and the piston rod 51B protrudes from the left end of the cylinder 51A toward the left. The second gas cylinder 61 is disposed between two pulleys 63 separated from each other on the left and right such that the cylinder 61A is closer to the left end and the piston rod 61B protrudes from the right end of the cylinder 61A toward the right. Accordingly, the first gas cylinder 51 and the second gas cylinder 61 are less likely to interfere with each other even when the thick cylinders 51A and 61A vibrate, and the left and right weight balance is also improved. Further, even when the first gas cylinder 51 and the second gas cylinder 61 are operated, the movements of the respective mass cancel each other, so that unnecessary force is not applied to the seating portion. In addition, since the cylinder 51A and the cylinder 61A are respectively moved toward the end portions in the left-right direction, the amount of operation of the piston rod 61B can be increased.

  As shown in FIGS. 7 and 8, the pin 94 is non-rotatably engaged with the link 25, is rotatably engaged with the rear ends of the left and right side frames 31 of the base frame 30, and is rotated with the rear link 23. Engageably, the end of the second wire 62 is connected, and is inserted into a guide hole 41 </ b> A formed in the rear end of the left and right side frames 41 of the movable frame 40. Thereby, the pin 94 as one part functions as a node for assembling the link 25, the base frame 30, the rear link 23, and the movable frame 40 together, a function for guiding the movement of the movable frame 40, the second It fulfills the function of fixing the end of the wire 62 and the function of connecting (fixing) the rear link 23 and the link 25 together. That is, in this embodiment, since the pin 94 as one part performs the above-described plurality of functions, the frame structure of the vehicle seat is compared with the configuration in which the parts and parts that perform the respective functions are provided independently. Can be simplified and the number of parts can be reduced.

The operation of the vehicle seat configured as described above will be described.
As shown in FIGS. 9 and 10, in the normal state, the movable frame 40 is located at a position suitable for normal seating (position before the post-operation state) with respect to the base frame 30, and the lift link 43 is oriented upward by about 45 ° from the front. The cylinder 51 </ b> A of the first gas cylinder 51 is located at the right end between the pulleys 53, and the cylinder 61 </ b> A of the second gas cylinder 61 is located at the left end between the pulleys 63.

  9 to 12, the slider 15, the base frame 30, and the movable frame 40 are shown in an overlapping manner, and the line type is changed for each member in order to easily distinguish these. For the same reason, the first gas cylinder 51, the first wire 52, the pulley 53, the second gas cylinder 61, the second wire 62, and the pulley 63 are also represented by solid lines.

  If a large deceleration greater than a predetermined value occurs when the vehicle collides with the front, a signal is output from an acceleration sensor (not shown) to operate the gas generators 51C and 61C. As a result, the first gas cylinder 51 and the second gas cylinder 61 are operated and contracted, and the cylinders 51A and 61A and the piston rods 51B and 61B move to move the first wire 52 and the second wire 62. Pull. As a result, the driving forces of the first gas cylinder 51 and the second gas cylinder 61 are transmitted to the seat belt and the base frame 30, respectively.

As shown in FIGS. 11 and 12, when the first wire 52 is pulled, the anchor 56 and the inner buckle 57 connected to the first wire 52 are pulled. As a result, the waist portion of the seat belt is tightened, and the occupant is prevented from separating from the vehicle seat.
When the second wire 62 is pulled, the pin 94 (base frame 30) connected to the second wire 62 tries to be attracted to the movable frame 40. The movable frame 40 (seat surface) moves backward. At this time, the rear end portion of the movable frame 40 moves so that the guide hole 41 </ b> A follows the pin 94. And since the front part of the movable frame 40 is supported by the base frame 30 by the lift link 43, as the movable frame 40 moves rearward, the lift link 43 turns rearward so that its tip is moved. Ascending upward, the front portion of the movable frame 40 is lifted in the same manner as the movement trajectory of the tip of the lift link 43. As a result, the seat surface on the cushion (not shown) moves backward while the front portion rises, and the seat surface can easily receive the occupant trying to move forward due to inertia, making the occupant difficult to separate from the vehicle seat. .

In the vehicle seat of the present embodiment as described above, the following effects can be obtained.
Since both end portions 44B of the connection pipe 44 are connected to the guide hole 41A extending in the front-rear direction, the guide hole 41A can be formed as long as possible, and a sufficient amount of movement of the movable frame 40 can be ensured. it can. Alternatively, the movable frame 40 (side frame 41) can be shortened as compared with a configuration in which both end portions 44B of the connection pipe 44 are connected before or after the guide hole 41A. Can be reduced.

  Since the guide hole 41A of the movable frame 40 is inserted into the pin 94 that engages with the base frame 30 and the end of the second wire 62 is connected, the end of the second wire 62 is connected to the base frame 30. There is no need to provide an independent member or the like. Thereby, while being able to simplify the structure of the base frame 30, the number of parts of a vehicle seat can be reduced.

  Since the connection pipe 44 is curved in a direction in which the central portion 44A is farther from the occupant than the both end portions 44B, the feeling of hitting the occupant can be suppressed.

  Since both end portions 44B of the connecting pipe 44 are connected to the bulging portion 41B provided on the guide hole 41A, the rigidity around the guide hole 41A can be improved and the mounting rigidity of the connecting pipe 44 can be increased. Can be improved.

  The base frame 30 (side frame 31) is curved so that the facing portion 31A is displaced outward with respect to the mounting portion 31B when viewed from the rear, so that it interferes with the base frame 30 when the movable frame 40 moves rearward. You can avoid doing that. Moreover, since the space | interval of the attaching part 31B becomes smaller than the space | interval of the opposing part 31A, the base frame 30 and the seat back frame 2 can be made compact.

  Since the second gas cylinder 61 for moving the seat surface rearward from the first gas cylinder 51 for retracting the seat belt at the time of a frontal collision is disposed above, the first wire 52 and the second wire 62 It is easy to handle and the two gas cylinders 51 and 61 can be arranged compactly.

  And among the seating parts, the second gas cylinder 61 is arranged using the space in front of the upper part, and the first gas cylinder 51 arranged behind the second gas cylinder 61 is relatively By setting it to a low position, it is possible to ensure a large space for the cushion stroke that is required particularly in the rear portion of the seating portion, that is, a space for bending the seat spring 81 downward.

  Further, when the front part of the movable frame 40 rises upward at the time of a frontal collision, it becomes difficult for the occupant to be displaced with respect to the seating part, the vehicle seat can easily hold the occupant, and the second provided on the movable frame 40. The first gas cylinder 51 and the second gas cylinder 61 are unlikely to interfere with each other because the gas cylinder 61 moves upward while moving upward. Therefore, the first gas cylinder 51 and the second gas cylinder 61 can be arranged relatively close to each other, and these can be arranged compactly.

  And the 1st gas cylinder 51 and the 2nd gas cylinder 61 are distributed back and forth with respect to the front link connection pipe 22 which connects the right and left front links 21, and the height of the height by arranging these is increased. Can be suppressed.

  Since the front link connecting pipe 22 is curved so that the central portion 22A is positioned below the both end portions 22B, interference between the front link connecting pipe 22 and the second gas cylinder 61 can be avoided. The connecting pipe 22 and the second gas cylinder 61 can be arranged in a compact manner.

  The interference between the cylinders 51A and 61A of the two gas cylinders is suppressed, and the movement of the mass due to the movement of the two cylinders 51A and 61A at the time of a frontal collision is opposite to each other on the left and right. There is nothing.

  Since the cylinders 51A and 61A are arranged close to either one of the left and right ends, the operation amount of the piston rods 51B and 61B can be secured large, and each cylinder 51A suspended by the first wire 52 or the second wire 62 can be secured. The amplitude of the vibration of 61A can be kept small.

  Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below.

  For example, in the above-described embodiment, the cylinder 51A of the first gas cylinder 51 is arranged on the right, but this is reversed, and the cylinder 51A is arranged on the left as shown in FIG. 13 and connected to the cylinder 51A. The first wire 52 thus connected can be connected to the inner buckle 57, and the first wire 52 connected to the piston rod 51B can be connected to the anchor 56. In this way, the inner buckle 57, which is connected to the seat belt from the shoulder and the seat belt at the waist and is difficult to retract, is connected to the cylinder 51A with a small operation amount, and the anchor 56 that is easy to retract is connected to the piston rod 51B with a large operation amount. Since it was connected to, the part hung over the waist | hip | lumbar part of a seatbelt can be tightened effectively.

  In the said embodiment, although the pin 94 formed in the hexagon bolt shape was illustrated as an attachment member, it is not limited to this, For example, a cylindrical pipe, a column-shaped rod, etc. may be sufficient. Moreover, in the said embodiment, although the pin 94 was engaged with the base frame 30 so that rotation was possible, the pin may be engaged so that rotation is impossible. In this case, the pin may be a rectangular tube or a prism.

  In the above-described embodiment, the movable frame 40 (pan frame 42) has a configuration in which the concave portion 42A is provided in the portion facing the second gas cylinder 61. However, the present invention is not limited to this. It is good also as a structure which has the hole provided in the frame 42, between the two rod-shaped connection members which connect the left and right side frames 41, etc.). In the above embodiment, the movable frame 40 has the concave portion 42A on the lower side. However, when the concave portion is provided on the upper side of the movable frame or an opening is provided on the movable frame, the second gas cylinder is provided. 61 may be disposed above the movable frame.

  In the embodiment, the first wire 52 extending from both ends (the cylinder 51A and the piston rod 51B) of the first gas cylinder 51 is connected to the end portions (anchor 56 and inner buckle 57) of the seat belt. It is not limited, It is good also as a structure which connects the 1st wire 52 in the middle of a seatbelt, and pulls the middle of a seatbelt when the 1st gas cylinder 51 act | operates.

  In the above embodiment, the pin 94 (mounting member) is engaged with the base frame 30, and the second gas cylinder 61 (driving force generating member) and the guide hole 41A are provided in the movable frame 40. However, the present invention is not limited to this. The mounting member may be provided on the movable frame, and the driving force generating member and the guide hole may be provided on the base frame. Note that, as in the above-described embodiment, the guide hole 41A is provided in the movable frame 40, whereby the rigidity of the base frame 30 can be secured and the weight of the movable frame 40 can be reduced. It can be moved instantly and smoothly. When the mounting member is provided on the movable frame, instead of providing an independent part such as the pin 94 described above, for example, both ends 44B of the connection pipe 44 (connection member) are extended to perform the same function as the pin 94. It is good also as a structure to have. According to this, the number of parts of the vehicle seat can be reduced.

  In the said embodiment, although the axis line of the gas cylinders 51 and 61 was arrange | positioned toward right and left, it is not limited to this, For example, you may arrange | position an axis line toward front and back. Further, the directions in which the axes of the two gas cylinders 51 and 61 are directed may be different.

  In the above embodiment, the gas cylinder is exemplified as the driving force generating member, but the present invention is not limited to this, and for example, a spring or a motor may be used.

  In the said embodiment, although the wire was illustrated as a power transmission member, it is not limited to this, For example, a chain, a rod, etc. may be sufficient.

  In the above-described embodiment, the rotatable pulley is exemplified as the member that changes the direction of the force acting on the wires 52 and 62. However, the pulley is not limited thereto, and has, for example, a cylindrical surface around which the wire or the like is wound. The member which does not rotate may be sufficient and the cylindrical member which lets a wire etc. pass inside may be sufficient.

  In the embodiment, the connecting pipe 44 (connecting member) is curved so that the central portion 44A is positioned below the both end portions 44B. However, the present invention is not limited to this, and the central portion of the connecting member is more than the both end portions. You may curve so that it may be located back. Moreover, you may curve so that the center part of a connection member may be located below and back rather than both ends.

  In the embodiment, both end portions 44B of the connecting pipe 44 (connecting member) are connected to the guide hole 41A. However, the present invention is not limited to this, and both end portions of the connecting member are below the guide hole (for example, the guide hole). And a connecting member may be positioned directly below the guide hole. According to this, even if the central part of the connecting member is not curved downward, it is possible to reduce the feeling of hitting the occupant.

  In the said embodiment, although the cylindrical connection pipe 44 was illustrated as a connection member, it is not limited to this, For example, a columnar or prismatic connection member may be sufficient.

  In the above-described embodiment, the movable frame (the seating surface of the seating portion) is moved rearward at the time of a frontal collision, but the moving direction is not limited to the rearward. For example, the front portion of the seating portion is lifted at the time of a frontal collision. Or the rear part of the seating part may be lowered.

  In the embodiment, the guide holes 41A are formed at the rear end portions of the left and right side frames 41 of the movable frame 40. However, the present invention is not limited to this, and the left and right side walls of the movable frame (the side walls of the pan frame 42 of the embodiment are not provided). May be formed at the front end portion or the central portion.

  In the above-described embodiment, the movable frame 40 is moved and the base frame 30 is not moved at the time of a frontal collision. However, the present invention is not limited to this, and the base frame may be slightly moved relative to the airframe at the time of a frontal collision. Good.

  In the above-described embodiment, the vehicle seat is shown as an application example of the vehicle seat. However, the vehicle seat of the present invention can be applied to other vehicle seats, for example, a ship seat or an aircraft seat. In the present invention, “front” is based on the passenger sitting on the seat. Therefore, when the seat (occupant sitting on the seat) faces rearward with respect to the traveling direction of the vehicle, the rearward in the traveling direction is forward with respect to the occupant, for example, when the vehicle is bumped from the rear. It becomes a collision.

DESCRIPTION OF SYMBOLS 1 Seat frame 2 Seat back frame 3 Seating part frame 10 Rail slider apparatus 20 Height adjustment mechanism 30 Base frame 31 Side frame 31A Opposing part 31B Attachment part 32 Connection pipe 40 Movable frame 41 Side frame 41A Guide hole 41B Expansion part 42 Pan frame 43 Lifting link 44 Connecting pipe 44A Central portion 44B Both ends 50 Pretensioner device 60 Seating surface moving device 61 Second gas cylinder 61A Cylinder 61B Piston rod 61C Gas generator 62 Second wire 94 Pin

Claims (5)

A vehicle seat configured such that a seating surface of a seating portion moves during a frontal collision with respect to an occupant,
A base frame supported on the vehicle body side of the seating portion;
A movable frame movable relative to the base frame;
A driving force generating member that operates in a frontal collision,
A power transmission member that moves the movable frame relative to the base frame by transmitting the driving force of the driving force generating member between the base frame and the movable frame;
The movable frame is formed to extend forward and backward on the left and right side walls of the movable frame, and has a guide hole for guiding the movement of the movable frame, and a connecting member for connecting the left and right side walls of the movable frame,
The vehicle seat, wherein both ends of the connecting member are connected above or below the guide hole. It includes attachment members that respectively engage with the left and right side walls of the base frame,
The vehicle seat according to claim 1, wherein the attachment member is inserted into the guide hole and the power transmission member is connected thereto.   3. The vehicle seat according to claim 1, wherein the connecting member is curved in a direction in which a central portion is separated from an occupant from both ends. The movable frame has a bulging portion that bulges upward on the guide hole,
4. The vehicle seat according to claim 1, wherein both end portions of the connecting member are connected to the bulging portion. 5. The left and right side walls of the base frame are opposed to each other so as to sandwich the left and right side walls of the movable frame, and an attachment portion that protrudes upward at the rear end of the opposed portion and to which the seatback frame is attached. Have
5. The vehicle according to claim 1, wherein the base frame is curved so that the facing portion is displaced outward with respect to the mounting portion when viewed from the rear. Sheet.

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