JP2017202796A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of effectively exerting high impact absorption performance at the load input from outside.SOLUTION: A vehicle seat 1 comprises a side frame 21, a fixing bracket 43 and a rear link 52. The side frame 21 is configured to be capable of adjusting a height position to a floor F by turning of the rear link 52 around the other end as a center and derricking of the rear link 52. The fixing bracket 43 has a turn regulation part 44 regulating movement of the rear link 52 turning around the other end as the center at the load input from outside. The rear link 52 has a contact part 53 contacting the turn regulation part 44 when the rear link 52 turns around the other end as the center at the load input from outside. Besides, a link-side deformation part 61 is provided between the turn regulation part 44 and the contact part 53 so that the turn regulation part 44 and the contact part 53 are adjacent to each other at the load input from outside.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a vehicle seat.

  Conventionally, a frame member constituting a skeleton of a seat body on which an occupant is seated, a fixing member that fixes the seat body to a vehicle inner wall surface (for example, a vehicle floor surface), one end connected to the frame member side, and the other end A vehicle seat including a link member rotatably connected to a fixed member is known. The vehicle seat can adjust the height position of the seat body with respect to the vehicle floor surface by rotating the link member around the other end and raising and lowering the link member.

  For example, in Patent Document 1, when a load from a belt anchor of a seat belt (hereinafter referred to as a belt anchor load) is input during a frontal collision of a vehicle (hereinafter referred to as a front collision) or the like, the link member. A vehicle seat (vehicle) that restricts the movement of the link member that tries to rotate forward when the facing surface facing the fixing member in the vehicle is in contact with the fixing member, and that exerts an impact absorbing function when the belt anchor load is transmitted to the fixing member Sheet).

JP 2009-208737 A

  However, in the vehicle seat of the above-mentioned Patent Document 1, the larger the gap between the link member and the fixing member due to the undulating state of the link member (the height position of the seat body), the more the vehicle seat is in front of the vehicle seat For example, when an external load such as a belt anchor load is input (hereinafter referred to as an external load input), the moving distance until the link member rotates forward and contacts the fixed member is increased. Therefore, it takes time until the forward rotation of the link member is restricted, and the shock absorbing performance may not be sufficiently exhibited.

  The present disclosure provides a vehicle seat that can effectively exhibit high shock absorption performance when an external load is input.

  A vehicle seat according to an aspect of the present disclosure includes a frame member that forms a skeleton of a seat body on which an occupant is seated, a fixing member that fixes the seat body to the vehicle inner wall surface side, and one end connected to the frame member side. And a link member having the other end rotatably connected to the fixed member. The frame member is configured such that the height position relative to the vehicle floor surface can be adjusted by rotating the link member around the other end and raising and lowering the link member. The fixing member has a rotation restricting portion that restricts the movement of the link member about the other end when an external load is input. The link member has a contact portion that contacts the rotation restricting portion when the link member rotates around the other end when an external load is input. Between the rotation restricting portion and the abutting portion, a deformation portion is provided that deforms so that the rotation restricting portion and the abutting portion are close to each other when an external load is input.

  According to the vehicle seat, the deforming portion is provided between the rotation restricting portion of the fixing member and the contact portion of the link member. Therefore, when an external load is input, such as when a vehicle collides, when the link member rotates around the other end, the deforming portion deforms and the rotation restricting portion of the fixed member and the contact portion of the link member become Close to each other. Thereby, the contact part of a link member can be contact | abutted to the rotation control part of a fixing member at an early stage, and the movement which a link member rotates centering on the other end can be controlled at an early stage. Therefore, the input external load can be transmitted from the link member to the fixed member at an early stage.

  In particular, when the gap between the link member and the fixing member is large due to the undulation state of the link member (height position of the seat body), the link member rotates when the external load is input, and the contact portion of the link member becomes the fixing member. It is possible to more effectively exhibit the above-described effect of shortening the moving distance until it contacts the rotation restricting portion and performing the rotation restriction of the link member at an early stage. In this way, high impact absorption performance can be effectively exhibited when an external load is input.

  In the vehicle seat, the deforming portion may be provided on at least one of the fixing member and the link member. In this case, it is possible to easily realize a configuration capable of effectively exhibiting high shock absorption performance by simply providing the deforming portion on at least one of the fixing member and the link member.

  The deformable portion includes a link-side deformable portion that deforms between the one end and the other end of the link member so that the one end and the other end of the link member are close to each other when an external load is input. May be provided on one end side of the link member relative to the link-side deformable portion. In this case, it is possible to easily realize a configuration capable of exhibiting high shock absorption performance by simply providing the deforming portion at a predetermined position of the link member.

  Further, the deforming portion deforms between the connecting portion connected to the other end of the link member in the fixing member and the rotation restricting portion so that the connecting portion and the rotation restricting portion are close to each other when an external load is input. You may have a fixing member side deformation | transformation part. In this case, it is possible to easily realize a configuration capable of effectively exhibiting high shock absorption performance simply by providing the deforming portion at a predetermined position of the fixing member.

  In addition, a height adjusting mechanism that adjusts the height position of the frame member with respect to the vehicle floor is provided at a position where one end of the link member is connected to the frame member side by a meshing gear structure configured by a plurality of gears meshing with each other. It may be provided. When a height adjustment mechanism with a meshing gear structure is provided, when the link member rotates around the other end when an external load is input, the gear teeth are cut when the moving distance of the link member becomes long There is a risk of problems such as damage. For example, measures to increase the rigidity of the gear by increasing the thickness of the gear can be considered. However, if the thickness of the gear is increased, the mass increases accordingly. However, according to the vehicle seat, since the rotation of the link member can be controlled at an early stage, high shock absorbing performance can be exhibited, and the above measures such as increasing the thickness of the gear are taken. Therefore, the occurrence of problems such as gear damage can be suppressed.

It is a side view which shows the frame | skeleton of a sheet | seat. It is a perspective view which shows the connection part of the rear link and fixing bracket of a sheet | seat. It is a perspective view which shows another example of the link side deformation | transformation part of a rear link. It is a perspective view which shows another example of the link side deformation | transformation part of a rear link. It is a perspective view which shows another example of the link side deformation | transformation part of a rear link. It is a perspective view which shows the connection part of the rear link and fixing bracket of a sheet | seat. It is a perspective view which shows another example of the bracket side deformation | transformation part of the bracket for fixation.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
In the present embodiment, the vehicle seat of the present disclosure is applied to a vehicle seat used in an automobile or the like.

  In the present embodiment, the arrows indicating the up, down, front, back, left, and right directions attached to the drawings are described for easy understanding of the relationship between the drawings. The present disclosure is not limited to the directions given in the drawings.

  As shown in FIG. 1, a seat (vehicle seat) 1 includes a seat body 10 on which a passenger sits. The seat body 10 is provided on the cushion frame 2 constituting the skeleton of the seat cushion that supports the occupant's buttocks, the back frame 3 constituting the skeleton of the seat back that supports the back of the occupant, and the upper portion of the back frame 3. A headrest frame (not shown) constituting a skeleton of a headrest that supports the head of the occupant.

  The skeletons of the seat 1 shown in FIG. 1 are arranged in pairs in the width direction of the seat 1 (the left-right direction of the vehicle). FIG. 1 is a side view of the right skeleton of the sheet 1 as viewed from the inside of the sheet 1. Since the left skeleton and the like of the seat 1 have the same shape as the right skeleton and the like, the right skeleton and the like will be described below as a representative.

  The cushion frame 2 includes a pair of side frames (frame members) 21 disposed on the left side and the right side of the seat cushion, respectively. The pair of side frames 21 are disposed to face each other in the left-right direction. The pair of side frames 21 are formed to extend in the longitudinal direction in the front-rear direction.

  The cushion frame 2 includes a cylindrical front rod 23 disposed at the front portion of the seat cushion, and a cylindrical rear rod 24 disposed at the rear portion of the seat cushion. The front rod 23 is installed in the left-right direction between the front end portions of the pair of side frames 21. The rear rod 24 is installed in the left-right direction between the rear ends of the pair of side frames 21.

  A reclining plate 26 is attached to the rear end of each side frame 21. The back frame 3 is attached to the reclining plate 26 via a recliner (not shown). The angle of the back frame 3 with respect to the cushion frame 2 can be adjusted by operating the recliner.

  The slide rails 4 are respectively arranged below the side frames 21. Each of the pair of slide rails 4 includes a lower rail 41 attached to a vehicle floor (vehicle inner wall surface, vehicle floor surface) F and an upper rail 42 attached to the lower rail 41 so as to be slidable in the front-rear direction.

  Between the side frame 21 and the slide rail 4, a front link 51 and a rear link 52, which are two link members having one end connected to the side frame 21 side and the other end rotatably connected to the floor F side. Have Here, one end of the link member may be directly connected to the side frame 21 or may be indirectly connected to the side frame 21 via another member.

  Specifically, the front link 51 has one end rotatably connected to the front end of the side frame 21 via the front rod 23 and the other end fixed to the upper rail 42 of the slide rail 4 (fixing bracket). Member) 43 is rotatably connected to the front end portion of the member 43 via a rotary shaft member 431. One end of the rear link 52 is rotatably connected to the rear end portion of the side frame 21 via the rear rod 24, and the other end is rotatable to the rear end portion of the fixing bracket 43 via the rotary shaft member 431. It is connected. The fixing bracket 43 fixes the seat body 10 to the floor F side via the slide rail 4. The fixing bracket 43 may be directly fixed to the floor F.

  A substantially sector-shaped sector gear 27 is fixed to the rear rod 24. A plurality of teeth are provided on the arcuate end edge of the sector gear 27. The plurality of teeth of the sector gear 27 are configured to mesh with the plurality of teeth of the pinion gear 28 attached to the side frame 21. The pinion gear 28 rotates by operating an operation lever (not shown) attached to the side frame 21.

  The pair of side frames 21 is configured such that the pair of front links 51 and the pair of rear links 52 rotate around their respective other ends, and the pair of front links 51 and the pair of rear links 52 are raised and lowered synchronously. The height position of the seat body 10 with respect to the floor F can be adjusted.

  Specifically, by operating the operation lever to rotate the pinion gear 28, the rear rod 24 rotates through the sector gear 27, and the pair of rear links 52 rotate about the rotation shaft member 431. Further, the pair of front links 51 together with the pair of rear links 52 rotate around the rotation shaft member 431. Accordingly, the pair of front links 51 and the pair of rear links 52 are raised and lowered, and the height position of the pair of side frames 21 with respect to the floor F can be adjusted.

  As shown in FIGS. 1 and 2, the rear link 52 is connected to the fixing bracket 43 at the other end when an external load is input to the seat 1 due to, for example, a frontal collision of the vehicle. A rotation restricting portion 44 that restricts a movement (movement in the direction of arrow A) that rotates toward the front (hereinafter referred to as forward rotation) at the center is provided. The rotation restricting portion 44 is formed integrally with the fixing bracket 43. The rotation restricting portion 44 is formed so as to protrude leftward from the upper end portion of the fixing bracket 43. The rotation restricting portion 44 may be configured as a separate body (separate member) from the fixing bracket 43.

  The rear link 52 is provided with a contact portion 53 that contacts the rotation restricting portion 44 of the fixing bracket 43 when the rear link 52 rotates forward about the other end when an external load is input. The contact portion 53 is formed integrally with the rear link 52. The contact portion 53 is formed so as to protrude leftward from an end edge portion on the front side of the rear link 52 (an end edge portion positioned on the front side in the standing state of the rear link 52). The contact portion 53 may be configured as a separate body (separate member) from the rear link 52.

  Further, between the one end and the other end of the rear link 52, it can be deformed so that the rotation restricting portion 44 of the fixing bracket 43 and the contact portion 53 of the rear link 52 are close to each other when an external load is input. The link side deformation | transformation part 61 which is a deformation | transformation part comprised in is provided. The link side deformable portion 61 is configured to be deformable (buckled) so that one end and the other end of the rear link 52 are close to each other when an external load is input. The link side deformable portion 61 is a cutout portion formed by cutting out the front edge portion of the rear link 52. The link-side deformable portion 61 is configured to be more fragile (lower strength) than other portions of the rear link 52.

  The link side deforming portion 61 is provided on the other end side (fixing bracket 43 side) of the rear link 52 with respect to the abutting portion 44. In other words, the contact portion 44 is provided on one end side (side frame 21 side) of the rear link 52 with respect to the link-side deformable portion 61. The link-side deforming portion 61 is provided between the rotation restricting portion 44 of the fixing bracket 43 and the abutting portion 53 of the rear link 52, that is, in a portion (area) connecting the rotation restricting portion 44 and the abutting portion 53. Is provided.

  In the seat 1 configured as described above, the rear link 52 rotates forward about the other end when an external load is input, such as when the vehicle collides. At this time, the link-side deformation portion 61 of the rear link 52 is deformed (buckled) so that one end and the other end of the rear link 52 are close to each other, and the rotation restricting portion 44 of the fixing bracket 43 and the rear link are 52 abutment portions 53 are close to each other. Thereby, the contact part 53 of the rear link 52 can be brought into contact with the rotation restricting part 44 of the fixing bracket 43 at an early stage, and the movement of the rear link 52 rotating forward about the other end can be regulated at an early stage. Therefore, the input external load can be transmitted from the rear link 52 to the fixing bracket 43 at an early stage, and high shock absorbing performance can be effectively exhibited.

Next, the effect in the sheet | seat 1 of this embodiment is demonstrated.
According to the seat 1 of the present embodiment, the link side deformation portion 61 is provided between the rotation restricting portion 44 of the fixing bracket 43 and the contact portion 53 of the rear link 52. For this reason, when the external link is input, when the rear link 52 rotates forward about the other end, the link-side deformable portion 61 is deformed to contact the rotation restricting portion 44 of the fixing bracket 43 and the rear link 52. 53 are close to each other. Thereby, the contact part 53 of the rear link 52 can be brought into contact with the rotation restricting part 44 of the fixing bracket 43 at an early stage, and the movement of the rear link 52 rotating forward about the other end can be regulated at an early stage. Therefore, the input external load can be transmitted from the rear link 52 to the fixing bracket 43 at an early stage.

  In particular, when the gap between the rear link 52 and the fixing bracket 43 is large due to the undulation state of the rear link 52 (height position of the seat body 10), the rear link 52 rotates forward when an external load is input. The moving distance until the abutting portion 53 of the fixing bracket 43 abuts against the rotation restricting portion 44 of the fixing bracket 43 is shortened, and the above effect of restricting the front link from turning forward is effectively exhibited. it can. In this way, high impact absorption performance can be effectively exhibited when an external load is input.

  Further, the link side deforming portion 61 is provided on the rear link 52. Therefore, the structure which can exhibit high shock absorption performance is easily realizable only by providing the link side deformation | transformation part 61 in the rear link 52. FIG.

  Further, the link side deforming portion 61 is configured to be deformed between one end and the other end of the rear link 52 so that the one end and the other end of the rear link 52 are close to each other when an external load is input. The contact portion 53 is provided on one end side of the rear link 52 with respect to the link side deformation portion 61. Therefore, the structure which can exhibit high shock absorption performance is easily realizable only by providing the link side deformation | transformation part 61 in the predetermined position of the rear link 52. FIG.

  In addition, at a position where one end of the rear link 52 is connected to the side frame 21 side, a high gear with respect to the floor F of the side frame 21 is formed by a meshing gear structure constituted by a plurality of gears (sector gear 27, pinion gear 28) that mesh with each other. A height adjusting mechanism for adjusting the position is provided. In the case where the height adjusting mechanism by the meshing gear structure is provided, when the rear link 52 rotates around the other end when an external load is input, if the moving distance of the rear link 52 becomes longer, the teeth of the sector gear 27 are moved. There is a possibility that problems such as gear damage such as cutting will occur. For example, measures to increase the rigidity of the sector gear 27 by increasing the plate thickness of the sector gear 27 can be considered. However, if the plate thickness of the sector gear 27 is increased, the mass increases accordingly. However, according to the seat 1 of this embodiment, since the rotation of the rear link 52 can be controlled at an early stage, high shock absorption performance can be exhibited, and the plate thickness of the sector gear 27 is increased. It is possible to suppress the occurrence of problems such as gear damage without taking countermeasures.

(Other embodiments)
Needless to say, the present disclosure is not limited to the above-described embodiment, and can be implemented in various forms without departing from the present disclosure.

  (1) In the above-described embodiment, the “vehicle seat” of the present disclosure is applied to a vehicle seat (seat 1) used in an automobile, but for example, applied to a vehicle seat used in a railway other than an automobile. Alternatively, the present invention may be applied to a sheet used for other vehicles such as an aircraft and a ship.

  (2) In the above embodiment, the vehicle floor (vehicle floor surface) F corresponds to the “vehicle inner wall surface” of the present disclosure, and the “vehicle inner wall surface” includes the vehicle floor surface and the vehicle inner side. Side wall surfaces and the like.

  (3) In the above embodiment, the link side deformable portion 61 is a notched portion formed by notching the front edge of the rear link 52, but the configuration of the link side deformable portion 61 is limited to this. It is not a thing. For example, as shown in FIG. 3, the link-side deformable portion 61 may be configured by a fragile portion having a through hole 611 formed so as to penetrate the front edge portion of the rear link 52. Further, as shown in FIG. 4, the link side deformable portion 61 may be a bead portion in which the front edge portion of the rear link 52 is projected. Further, as shown in FIG. 5, the link-side deformable portion 61 may be a step portion formed in a direction intersecting with an extending direction (longitudinal direction) connecting both ends of the rear link 52.

  (4) In the above embodiment, the link side deforming portion 61 is provided on the rear link 52, but may be provided on the front link 51, or provided on both the front link 51 and the rear link 52, for example. It may be done.

  (5) In the above-described embodiment, the link-side deformation portion 61 that is the “deformation portion” of the present disclosure is provided in the rear link 52 that is the “link member” of the present disclosure. You may provide in "member." FIG. 6 shows an example in which the deforming portion is provided in the fixing bracket 43 which is a “fixing member”.

  As shown in FIG. 6, the upper end portion of the fixing bracket 43 is deformed so that the rotation restricting portion 44 of the fixing bracket 43 and the contact portion 53 of the rear link 52 are close to each other when an external load is input. A bracket-side deformable portion (fixed member-side deformable portion) 62 that is a deformable portion configured to be possible is provided. The bracket-side deforming portion 62 is a bead portion in which the upper end portion of the fixing bracket 43 is protruded. The bracket-side deforming portion 62 is configured to be weaker (low strength) than the other portions of the fixing bracket 43.

  The bracket-side deforming portion 62 is provided between the rotating shaft member 431 serving as a connecting portion connected to the other end of the rear link 52 in the fixing bracket 43 and the rotation restricting portion 44 of the fixing bracket 43. The bracket side deforming portion 62 is provided between the rotation restricting portion 44 of the fixing bracket 43 and the contact portion 53 of the rear link 52. In this way, by simply providing the bracket-side deformable portion 62 at a predetermined position of the fixing bracket 43, a configuration capable of exhibiting high shock absorption performance can be easily realized.

  6 is a bead portion in which the upper end portion of the fixing bracket 43 is protruded, the configuration of the bracket-side deformable portion 62 is not limited to this. For example, as shown in FIG. 7, the bracket-side deformable portion 62 may be a stepped portion formed in a direction intersecting the extending direction (longitudinal direction) connecting both ends of the fixing bracket 43. .

  (6) In the above embodiment, the link-side deformation portion 61 and the bracket-side deformation portion 62 which are “deformation portions” of the present disclosure are formed between the rotation restriction portion 44 of the fixing bracket 43 and the contact portion 53 of the rear link 52. It is provided in between. The deformation portion may be provided between the rotation restricting portion of the fixed member and the abutting portion of the link member, that is, provided in a portion (area) connecting the rotation restricting portion and the abutting portion. It may be provided on one or both of the fixing members, or may be provided on a member interposed between the link member and the fixing member, for example.

  (7) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

  DESCRIPTION OF SYMBOLS 1 ... Seat (vehicle seat), 10 ... Seat body, 21 ... Side frame (frame member), 43 ... Fixing bracket (fixing member), 44 ... Rotation restricting part, 51 ... Front link (link member), 52 ... rear link (link member), 53 ... contact part, 61 ... link side deformation part (deformation part), 62 ... bracket side deformation part (deformation part, fixed member side deformation part), F ... floor (vehicle inner wall surface, Vehicle floor)

Claims (5)

A vehicle seat,
A frame member constituting a skeleton of a seat body on which an occupant is seated;
A fixing member for fixing the seat body to the vehicle inner wall surface side;
A link member having one end connected to the frame member side and the other end rotatably connected to the fixing member;
The frame member is configured to be capable of adjusting a height position with respect to a vehicle floor surface by rotating the link member around the other end and raising and lowering the link member,
The fixing member has a rotation restricting portion that restricts movement of the link member rotating around the other end when an external load is input,
The link member has a contact portion that contacts the rotation restricting portion when the link member rotates around the other end when the external load is input,
A vehicle is provided between the rotation restricting portion and the abutting portion, wherein a deformation portion is provided that deforms so that the rotation restricting portion and the abutting portion are close to each other when the external load is input. Sheet.   The vehicle seat according to claim 1, wherein the deformable portion is provided on at least one of the fixing member and the link member.   The deforming portion is a link-side deforming portion that deforms between the one end and the other end of the link member so that the one end and the other end of the link member are close to each other when the external load is input. The vehicle seat according to claim 2, wherein the contact portion is provided closer to the one end side of the link member than the link side deformation portion.   The deforming portion is configured such that the connection portion and the rotation restricting portion are connected to each other between the connection portion connected to the other end of the link member in the fixing member and the rotation restricting portion when the external load is input. The vehicle seat according to claim 2, further comprising a fixed member side deformation portion that is deformed so as to approach the vehicle.   At the position where the one end of the link member is connected to the frame member side, a height for adjusting the height position of the frame member with respect to the vehicle floor surface by a meshing gear structure constituted by a plurality of gears meshing with each other. The vehicle seat according to any one of claims 1 to 4, wherein an adjustment mechanism is provided.

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