JP2010285029A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compactly arrange a driving force generating member for moving a seat surface and pulling in a seat belt in a frontal collision. <P>SOLUTION: This vehicle seat is constituted so that the seat surface of a seating part moves in the frontal collision with an occupant as a reference. The vehicle seat includes a base frame supported on the machine body side of a vehicle among the seating part, a movable frame 40 relatively movable to the base frame, the driving force generating member (a second gas cylinder 61) operating in the frontal collision, and a power transmission member for relatively moving the movable frame 40 to the base frame by transmitting driving force of the driving force generating member between the base frame and the movable frame 40. The driving force generating member is oppositely arranged to the movable frame 40, and the movable frame 40 has a recessed part 42 in an opposed part with the driving force generating member. <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.
Patent Documents 1 and 2 disclose a vehicle seat having a configuration in which a seat belt is immediately pulled by a pretensioner device at the time of a frontal collision.

JP 2008-213546 A JP 2008-195359 A

  By the way, it is difficult to provide a gas cylinder (driving force generating member) for moving the seat surface or retracting the seat belt at the time of a frontal collision.

  Accordingly, an object of the present invention is to provide a vehicle seat in which a driving force generating member for moving a seating surface or retracting a seat belt at the time of a frontal collision is arranged in a compact manner.

  The vehicle seat of the present invention that solves the above-described problem is a vehicle seat configured such that the seating surface of the seating portion moves at the time of a frontal collision with respect to the occupant, and the vehicle side of the vehicle of the seating portion A base frame supported on the base frame, 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 for the base frame and the movable A power transmission member that transmits between the frames or to a seat belt, the driving force generation member is disposed to face the movable frame, and the movable frame is a portion facing the driving force generation member. It is characterized by having a recess or an opening.

  The vehicle seat according to the present invention is a vehicle seat configured such that a seating surface of a seating portion moves at the time of a frontal collision with respect to an occupant, and is supported on the vehicle body side of the seating portion. A base frame, 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 between the base frame and the movable frame. And a power transmission member that moves the movable frame relative to the base frame by transmitting the driving force, the driving force generating member is disposed to face the movable frame, and the movable frame is A concave portion or an opening is provided in a portion facing the driving force generating member.

  In each of the vehicle seats described above, it is preferable that at least a part of the driving force generating member is arranged in a state of entering the recess or the opening.

  In each of the vehicle seats described above, the movable frame connects the left and right side walls and the front ends of the left and right side walls, the front connecting member in which the recess or the opening is formed, and the rear of the left and right side walls. And a rear connecting member for connecting the ends, further comprising a spring member stretched between the front connecting member and the rear connecting member, wherein the uppermost end of the driving force generating member is the spring member. It can be set as the structure arrange | positioned ahead from the foremost end part.

  In each of the vehicle seats described above, the movable frame includes a reinforcing member extending from one of the left and right sides of the movable frame to the other, and at least a part of the reinforcing member is disposed in the recessed portion or the opening. It can be set as the structure made.

  In each of the vehicle seats described above, in order to attach the seating portion to the vehicle body, the mounting bracket provided on the left and right below the seating portion and the left and right mounting brackets are pivotally connected. The right and left height adjustment links connected to the base frame so as to be pivotable, and link linking members that connect the left and right height adjustment links. It can be set as the structure curved so that it may be located below.

  According to the configuration described in claims 1 and 2, the driving force generating member is disposed to face the movable frame, and the concave portion or the opening is provided in the portion of the movable frame facing the driving force generating member. The driving force generating member can be brought closer to the movable frame while avoiding interference between the frame and the driving force generating member. Thereby, a driving force generation member can be arranged compactly.

  According to the configuration of the third aspect, since the driving force generating member can be brought closer to the movable frame by disposing at least a part of the driving force generating member in the recessed portion or the opening, the driving force is generated. The members can be arranged more compactly.

  According to the configuration of the fourth aspect, by arranging the uppermost end portion of the driving force generating member in front of the foremost end portion of the spring member, while ensuring a gap between the driving force generating member and the spring member. The driving force generating member can be arranged in a compact manner.

  According to the configuration described in claim 5, since at least a part of the reinforcing member extending from one to the other of the left and right sides of the movable frame is disposed in the recessed portion or the opening, the reinforcing member is improved while increasing the rigidity of the movable frame. Can also be arranged compactly.

  According to the configuration of the sixth aspect of the present invention, the link connecting member is curved so that the central portion is located below the both ends, so that interference between the link connecting member and the driving force generating member can be avoided. The link connecting member and the driving force generating member can be arranged in a compact manner.

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 ZZ sectional drawing of FIG. It is the figure which looked at the movable frame from the bottom. It is the figure which looked at the link connection pipe and the gas cylinder for seats from the front. 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. It is sectional drawing of the movable frame which concerns on a modification.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
A vehicle seat as an example of a vehicle seat according to the present invention is configured by covering a seat cushion made of urethane foam or the like on the outside of a 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 includes a rail slider device 10 as an example of a mounting bracket for attaching the seat to a vehicle body (an example of a vehicle body), and a height adjuster that changes the height of the seat surface. The mechanism 20, the base frame 30, the movable frame 40, a pretensioner device 50 that pulls in the seat belt at the time of a frontal collision, and a seating surface moving device 60 that moves the movable frame 40 backward at the time of a frontal collision are mainly provided. 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 as an example of a height adjustment link. These lower ends 21A and 23A are rotatably connected to the slider 15, and these upper ends 21B and 23B are bases. By being connected to the frame 30 so as to be rotatable, the base frame 30 can be moved up and down with respect to the slider 15 by a four-bar linkage mechanism.

Specifically, two front links 21 are provided on the left and right sides, and each lower end 21 </ b> A is pivotally supported by a metal fitting 91 provided at the front end of each slider 15, so that it can be pivotally connected to each slider 15. Has been. The left and right front links 21 are connected by a front link connecting pipe 22 as an example of a link connecting member 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 pivotally connected to the base frame 30 by being pivotally supported by a pin 92 (only one is shown). ing.
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 lower end 23 </ b> A is pivotally supported by the slider 15 via the bracket 93, and the upper end 23 </ b> B is engaged with a pin 94 that is rotatably engaged with a base frame 30 described later. Yes. 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 link 25 extending upward so as not to rotate. Further, 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 rotates with respect to the base frame 30. The fan-shaped 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. A dial 27 is rotatably provided at the front end of the right side frame 31. 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 the upper end of the link 43 The side frame 41 is rotatably connected.
Hexagonal bolt-shaped pins 94 are rotatably engaged with the left and right side frames 31 at the rear ends.

  The movable frame 40 connects a side frame 41 that forms left and right side walls, a pan frame 42 as an example of a front connecting member that connects the front ends of the left and right side frames 41, and the rear ends of the left and right side frames 41. A connecting pipe 44 as an example of a rear connecting member, a reinforcing pipe 45 as an example of a reinforcing member, and a mounting plate 46 (see FIG. 5) are provided.

  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. 4, the pan frame 42 is formed by pressing a sheet metal, and a concave portion 42 </ b> A and a protruding protrusion 42 </ b> B are formed on the lower surface of the pan frame 42 in order 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 as an example of a spring member is stretched between the hook 42 </ b> H formed on the pan frame 42 and the connection pipe 44. The foremost end 81A of the seat spring 81 is located behind the uppermost end 61T of the second gas cylinder 61 described later.

  As shown in FIG. 2, the connecting pipe 44 is curved so that a central portion 44A occupying about 70% of its length is positioned below the both end portions 44B. Each end portion 44B is connected to a protruding portion 41B protruding 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. 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. Therefore, the left and right side frames 41 can be connected to each other at a position directly above the guide hole 41A while suppressing the feeling of hitting the occupant.

  As shown in FIG. 5, the reinforcing pipe 45 extends from one side to the other side on the lower side of the pan frame 42. The reinforcing pipe 45 has a central portion 45A, which occupies about 70% of its length, extends straight to the left and right, and both end portions 45B are slightly inclined from the left and right directions toward the rear side opposite to the second gas cylinder 61. Is curved. Since all of the reinforcing pipes 45 are disposed in the recesses 42A of the pan frame 42, the reinforcing pipes 45 are accommodated extremely compactly while increasing the rigidity of the movable frame 40 (see FIG. 4).

  The mounting plate 46 is made of a steel plate thicker than the pan frame 42 and is cut out in accordance with the shape of both end portions 45B of the reinforcing pipe 45. The both ends 45B are fitted into the cut out portions, and the reinforcing pipe 45 And are welded. The mounting plate 46 is provided in an acute corner formed by the side frame 41 and both end portions 45B of the reinforcing pipe 45, and in a range extending from the corner to the rear of the both end portions 45B. The mounting plate 46 is welded to the lower surface 41 </ b> C of the side frame 41. Thus, the reinforcing pipe 45 connects the left and right side frames 41 via the mounting plate 46.

  The mounting plate 46 is not connected to the central portion 45A of the reinforcing pipe 45, but is connected only to both end portions 45B that are curved with respect to the central portion 45A.

  As shown in FIG. 2, 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. Yes.

  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. 4). The first gas cylinder 51 is arranged on the lower side (below the front) of the seat spring 81 (see FIG. 4) with its axis line directed to the left and right. As shown by a chain line in FIG. 4, when the occupant sits on the seat (seat), most of the load is applied to the rear of the seat spring 81 (seat surface). Larger and less forward deflection. Therefore, the first gas cylinder 51 can be arranged compactly by effectively using the space by arranging the first gas cylinder 51 in the space just below the seat spring 81 and at the front side where the deflection is small. Further, even when the seat spring 81 is bent, interference with the first gas cylinder 51 can be avoided, so that it is possible to prevent the occupant from feeling hit. Note that the front side of the seat spring 81 refers to the front side of the center portion of the seat spring 81.

  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. As shown in FIG. 2, the cylinder 51 </ b> A of the first gas cylinder 51 is connected to the seat belt anchor 56 by the first wire 52, and the piston rod 51 </ b> B is connected to the inner buckle 57 by the other first wire 52. It is connected to the. 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 61A is a portion that does not move through a 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 itself. 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. 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 so as to be wound around the two rear pins 94. It is stretched.

  As shown in FIG. 4, the second gas cylinder 61 is disposed to face the pan frame 42 under the pan frame 42 (movable frame 40). The pan frame 42 has a recess 42 </ b> A at a portion facing the second gas cylinder 61. In other words, the second gas cylinder 61 is disposed below the pan frame 42 so as to face the recess 42A. 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 can be accommodated in a compact manner as close as possible to the pan frame 42. In particular, since the upper part of the second gas cylinder 61 is arranged in a state where it enters the recess 42A, the second gas cylinder 61 can be accommodated extremely compactly.

  In addition, when the 2nd gas cylinder 61 is arrange | positioned under the plate-shaped pan frame 42, the attachment state of the 2nd gas cylinder 61 may become difficult to confirm. However, it is desirable from the viewpoint of improving workability that the mounting state of the second gas cylinder 61 can be easily confirmed. Therefore, in the present embodiment, an opening 42C is formed at a portion facing the second gas cylinder 61 of the pan frame 42 (the bottom surface of the recess 42A) (see also FIG. 1). Thereby, since the attachment state of the 2nd gas cylinder 61 can be easily confirmed even from on the pan frame 42, workability | operativity can be improved. In particular, in the present embodiment, as shown in FIG. 1, since the plurality of openings 42 </ b> C are formed along the axial direction of the second gas cylinder 61, it is easier to check the mounting state. In the present embodiment, since the uppermost end 61T of the second gas cylinder 61 is disposed in front of the foremost end 81A of the seat spring 81, the opening 42C is not covered by the seat spring 81. Therefore, it is easier to check the mounting state.

  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. 4, 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. 7, the piston rod 51B protruding from the first gas cylinder 51 and the piston rod 61B protruding from the second gas cylinder 61 are in the first and second directions so as to be opposite to each other. 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.

The operation of the vehicle seat configured as described above will be described.
As shown in FIGS. 7 and 8, in the normal state, the movable frame 40 is located at a position suitable for normal seating (a 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.

  7 to 10, 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 them. 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. 9 and 10, 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 the second gas cylinder 61 is disposed so as to face the pan frame 42 (movable frame 40) and the recess 42A is provided in a portion of the pan frame 42 facing the second gas cylinder 61, the pan frame 42 The second gas cylinder 61 can be brought closer to the pan frame 42 while avoiding interference with the second gas cylinder 61. Thereby, the 2nd gas cylinder 61 can be arrange | positioned compactly.

  In particular, since the upper part of the second gas cylinder 61 is arranged in a state where it enters the recess 42A, the second gas cylinder 61 can be brought closer to the movable frame 40, and the second gas cylinder 61 can be made more compact. Can be arranged.

  Since all of the reinforcing pipes 45 extending from one to the other of the left and right sides of the movable frame 40 (pan frame 42) are arranged in the recess 42A, the reinforcing pipes 45 are arranged extremely compactly while increasing the rigidity of the movable frame 40. can do.

  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.

  Since the first gas cylinder 51 is disposed at the front side of the lower part of the seat spring 81, the amount of bending when the occupant sits on the seating portion is small, so that the first gas cylinder 51 can be made compact by making effective use of space. Can be arranged. Further, since the interference between the first gas cylinder 51 and the seat spring 81 can be avoided, it is possible to suppress a feeling of hitting the occupant.

  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.

  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. 11 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 above embodiment, the upper part of the second gas cylinder 61 (driving force generating member) is arranged in a state of entering the recess 42A. However, the present invention is not limited to this, and the entire driving force generating member enters the recess. You may arrange in a state. Moreover, although all the reinforcement pipes 45 (reinforcement member) were arrange | positioned in the state which entered the recessed part 42A, it is not limited to this, You may arrange | position in the state which entered a part of reinforcement member in the recessed part.

  In the above-described embodiment, the pan frame 42 formed by pressing a sheet metal is illustrated as the front connection member. However, the present invention is not limited to this, and for example, the left and right side frames 41 of the movable frame 40 as shown in FIG. You may employ | adopt the cylindrical or column-shaped connection pipe 47 which connects.

  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 an opening in an opposing part. Examples of such openings include through holes provided in the plate-like pan frame 42, and between the two connecting pipes 47 that connect the left and right side frames 41 as shown in FIG.

  In the configuration shown in FIG. 12, the front end of the seat spring 81 is attached to the lower part of the rear connecting pipe 47, and the second gas cylinder 61 faces the opening formed between the two connecting pipes 47. The uppermost end 61T is disposed in front of the foremost end 81A of the seat spring 81. According to this, even when the seat spring 81 is bent between the second gas cylinder 61 and the seat spring 81, the second gas cylinder is secured while ensuring a gap so as not to interfere with the second gas cylinder 61. 61 can be arranged compactly.

  In the above-described embodiment, the second gas cylinder 61 is disposed opposite to the movable frame 40. However, the second gas cylinder 61 is not limited thereto, and may be disposed opposite to the movable frame 40. In this case, at the portion of the movable frame 40 facing the second gas cylinder 61, an opening as described above or a recessed portion that is recessed when viewed from above is formed.

  In the above-described embodiment, the second gas cylinder 61 that moves the seating surface (movable frame 40) of the seating portion is disposed to face the concave portion 42A of the movable frame 40. The first gas cylinder 51 that draws in the gas may be disposed so as to face the concave portion (or opening) of the movable frame 40.

  In the above-described embodiment, cylindrical pipes (the connection pipe 44 and the front link connection pipe 22) are exemplified as the rear connection member and the link connection member. However, the present invention is not limited to this, and the connection member may be a columnar or prismatic connection member. May be.

  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 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 embodiment, the second gas cylinder 61 is provided on the movable frame 40 (below the pan frame 42), but may be provided on the base frame 30. In this case, one end and the other end of the second wire 62 extending from the second gas cylinder 61 may be connected to any location of the movable frame 40. Thereby, the driving force of the second gas cylinder 61 can be transmitted to the movable frame 40.

  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 linear seat spring 81 is exemplified as the spring member, but the present invention is not limited to this, and a plate-like spring member or the like may be used.

  In the embodiment, both end portions 44B of the connecting pipe 44 (rear 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 connected below the guide hole. The connecting member may be located immediately 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 above-described embodiment, the hexagonal bolt-shaped pin 94 is exemplified, but the present invention is not limited to this, and for example, a cylindrical pipe or a columnar bar may be used. 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 (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 11 Rail 15 Slider 20 Height adjustment mechanism 21 Front link 22 Front link connection pipe 22A Center part 22B Both ends 23 Rear link 24 Rear link connection pipe 30 Base frame 31 Side Frame 32 Connection pipe 40 Movable frame 41 Side frame 41A Guide hole 41C Lower surface 42 Pan frame 42A Recess 42H Hook 44 Connection pipe 45 Reinforcement pipe 46 Mounting plate 50 Pretensioner device 51 First gas cylinder 52 First wire 56 Anchor 57 Inner Buckle 60 Seating surface moving device 61 Second gas cylinder 62 Second wire 81 Seat spring

Claims (6)

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 transmits the driving force of the driving force generating member between the base frame and the movable frame or to a seat belt;
The driving force generating member is disposed to face the movable frame,
The vehicle seat according to claim 1, wherein the movable frame has a recess or an opening at a portion facing the driving force generating member. 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 driving force generating member is disposed to face the movable frame,
The vehicle seat according to claim 1, wherein the movable frame has a recess or an opening at a portion facing the driving force generating member.   3. The vehicle seat according to claim 1, wherein at least a part of the driving force generating member is disposed in the recessed portion or the opening. The movable frame includes a left and right side wall, a front connection member that connects the front ends of the left and right side walls, the recess or the opening is formed, and a rear connection member that connects the rear ends of the left and right side walls. Have
A spring member stretched between the front connecting member and the rear connecting member;
4. The vehicle seat according to claim 1, wherein an uppermost end portion of the driving force generating member is disposed in front of a foremost end portion of the spring member. The movable frame has a reinforcing member extending from one of the left and right sides of the movable frame to the other,
5. The vehicle seat according to claim 1, wherein at least a part of the reinforcing member is disposed in the recessed portion or the opening. In order to attach the seating part to the vehicle body, mounting brackets provided on the left and right below the seating part;
Left and right height adjustment links that are pivotally connected to the left and right mounting brackets and pivotally connected to the base frame;
A link connecting member for connecting the right and left height adjustment links;
The vehicle seat according to any one of claims 1 to 5, wherein the link connecting member is curved so that a central portion is positioned below both end portions.

Images