JP6439567B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat.

  As described in the following Patent Document 1 and the like, a vehicle seat using a cloth-like support member (cloth spring) as a member for supporting a pad is known.

JP 2010-253242 A

  In a vehicle seat using such a cloth-like support member, when a large load is applied at the time of collision, for example, when a large downward load is applied to the front of the seat cushion at the time of a front collision, the cloth-type support member alone is used. May not be able to support Therefore, in the conventional vehicle seat as described in Patent Document 1, safety is ensured by fixing the front panel on the front side of the frame and increasing the mechanical strength on the front side of the seat. If a cloth-like support member that can withstand such a large load is selected without using such a front panel, the sitting comfort is reduced.

  The problem to be solved by the present invention is to provide a vehicle seat in which the tension of a support member increases when a large load is applied.

  In order to solve the above problems, a vehicle seat according to the present invention includes a support member that supports a pad, a connection member connected to an end of the support member, a biasing member that biases the connection member, A regulating member positioned on a side urged by the urging member, and the connecting member urged by the urging member normally contacts a regulating portion of the regulating member. On the other hand, when the contact state between the connecting member and the restricting portion of the restricting member is eliminated, the connecting member is displaced in a direction in which the tension of the support member is increased by the biasing force of the biasing member. And

  It is preferable that the contact state between the connecting member and the restricting portion of the restricting member is eliminated when the restricting member is deformed by a predetermined amount or more.

  The restricting portion of the restricting member includes a first portion that restricts movement of the connecting member in a direction urged by the urging member, and the connecting member in a direction opposite to the side where the pad is located. A second portion that restricts movement, and a load of an occupant is transmitted to the connection member via the pad, and the restriction member is deformed by a predetermined amount or more by pressing the second portion. The contact portion between the connecting member and the restricting portion of the restricting member may be canceled by the state where the first portion is not positioned on the side of the connecting member that is biased by the biasing member.

  In the vehicle seat according to the present invention, when a large load is applied and the contact state between the connecting member and the restricting portion of the restricting member is eliminated, the connecting member restricted by the restricting member is displaced by the urging force of the urging member. This increases the tension of the support member. Therefore, it is possible to improve safety when a large load is applied (without providing a member such as the front panel described in Patent Document 1) while maintaining a normal riding comfort.

  When the deformable member is deformed, the contact state between the connecting member and the restricting portion of the restricting member can be eliminated. When the restricting portion has the first part and the second part, it is possible to easily construct a structure that restricts the displacement of the connecting member in a normal state and a structure in which the restricting member is deformed by a load.

1 is an external view of a vehicle seat according to an embodiment of the present invention. 1 is an exploded perspective view of a vehicle seat (excluding a pad) according to an embodiment of the present invention. FIGS. 2A and 2B are cross-sectional views of a vehicle seat in a state where no occupant is seated (hatching is omitted), in which FIG. 1A is a cross-sectional view taken along line A-A shown in FIG. (C) is the figure which showed the CC line cross section shown in FIG. FIGS. 2A and 2B are cross-sectional views (hatching is omitted) of a vehicle seat in a state where an occupant is seated, where FIG. 1A is a cross-sectional view taken along line A-A shown in FIG. 1 and FIG. FIG. 3C is a cross-sectional view taken along the line BB shown in FIG. 1. FIG. 2 is a cross-sectional view in the width direction of a vehicle seat in a state where a large load is transmitted to the seat (hatching is omitted), (a) is a cross-sectional view taken along line AA shown in FIG. 1, and (b) is a diagram. FIG. 2C is a cross-sectional view taken along line B-B shown in FIG. 1 and FIG. FIG. 2 is a cross-sectional view (hatching is omitted) of the vehicle seat in a state where the restriction member is deformed by a predetermined amount or more and the restriction of the restriction member with respect to the connection member is eliminated, and (a) is shown in FIG. 1. FIG. 2 is a cross-sectional view taken along the line AA, (b) is a cross-sectional view taken along the line BB shown in FIG. 1, and (c) is a cross-sectional view taken along the line CC shown in FIG. FIG. 4 is a view (cross-sectional view) of the vehicle seat in a state in which the support member is pulled outward in the width direction due to the displacement of the connecting member (hatching is omitted), and (a) is A shown in FIG. FIG. 2B is a cross-sectional view taken along the line A-B, FIG. 2B is a cross-sectional view taken along the line B-B illustrated in FIG. 1, and FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Unless otherwise specified, the front-rear direction in the following description refers to the traveling / retreating direction of the vehicle on which the vehicle seat 1 is mounted, and the vertical direction refers to the vertical direction of the vehicle. The direction means a direction orthogonal to the front-rear direction and the up-down direction.

  The present invention applied to the seat cushion (seat portion) of the vehicle seat 1 will be described. The configuration described below can also be applied to a seat back (backrest portion), a headrest, etc. of the vehicle seat 1 (when applied to a seat back or a headrest, the vertical direction in the following description is the front-rear direction. In addition, the front-rear direction is replaced with the up-down direction (however, the seat back stands up along the up-down direction).

  As shown in FIGS. 1 and 2, the seat cushion includes a frame 10, a pad 20, a support member 30, a connection member 40, a biasing member 50, and a regulating member 60. The frame 10 is a skeleton portion of the seat cushion, and in the present embodiment, the frame 10 has a square shape (substantially square frame shape) having an open center as a whole. Specifically, a substantially rectangular frame is constructed by the front frame part 11, the left frame part 12, the right frame part 13, and the rear frame part (hereinafter referred to as the rod part 14). The front frame portion 11, the left frame portion 12, and the right frame portion 13 are plate-like, but the rod portion 14 that constitutes the rear side of the frame is a shaft body having a circular cross section. In the present embodiment, a single plate is bent and formed into a substantially U shape, and the rod portion 14 is fixed so as to bridge over the distal end side (between the left frame portion 12 and the right frame portion 13). 10 is built. The frame 10 is not provided with a member that reinforces the front side, such as the front panel described in Patent Document 1.

  A pad 20 is fixed on the frame 10. The pad 20 is covered with a pad cover (seat cover) at least on the upper and side surfaces.

  The support member 30 is a member provided in the opening 10 a of the frame 10. The support member 30 in the present embodiment is a stretchable cloth material (so-called cloth spring). The pad 20 is supported by a support member 30 located in the frame 10 and its opening 10a. That is, the frame 10, the pad 20, and the support member 30 form a portion where an occupant is seated. When the occupant is seated and the pad 20 is deformed, the support member 30 is pushed by the deformation, and the support member 30 is extended. The repulsive force (reaction force) of the extended support member 30 is transmitted to the occupant via the pad 20. When a part of the pad 20 is greatly deformed due to the occupant tilting or the like, the repulsive force of the support member 30 acting on the part increases. That is, since the support member 30 expresses a force for keeping the occupant level, the ride comfort is improved.

  Connection members 40 are connected to both sides of the support member 30 in the width direction. The connection member 40 according to the present embodiment is formed of an elongated shaft-shaped member (metallic wire). Any connection structure may be used for the support member 30 and the connection member 40. In this embodiment, both sides in the width direction of the support member 30 are folded to form a bag shape, and shaft-shaped connecting members 40 (a left side portion 41 and a right side portion 42 described later) are passed through the bag-shaped portion. Yes.

  In the support member 30, a portion located on the left side (hereinafter referred to as the left side portion 41) and a portion located on the other side in the width direction (hereinafter referred to as the right side portion 42) may be separate members or connected. Good. The support member 30 in the present embodiment has a shape in which the left side portion 41 and the right side portion 42 are connected via a rear side portion 43 located on the rear side. The rear side portion 43 has a curved shape such that the side view shape is hooked on the rod portion 14 of the frame 10. Further, since the support member 30 is formed of an elongated shaft-like member, it has elasticity as a whole. Therefore, the left side portion 41 and the right side portion 42 can be displaced in directions toward and away from each other.

  The biasing member 50 in the present embodiment is a coil spring. One end of the urging member 50 is hooked on the frame 10. The vehicle seat 1 according to the present embodiment includes two urging members 50, one end of one urging member 50 is inside the left frame portion 12 of the frame 10, and one end of the other urging member 50 is It is hooked inside the right frame portion 13 of the frame 10.

  A cutout 31 is formed in the support member 30. Due to the notch 31, a part of the left side 41 and a part of the right side 42 of the connecting member 40 are exposed. The other end of each urging member 50 is hooked on the exposed portion. The urging member 50 is a member that applies an urging force toward the outer side in the width direction to the connecting member 40 (a tension spring).

  The restricting member 60 is a member fixed to the frame 10. The vehicle seat 1 according to the present embodiment includes two restricting members 60, one restricting member 60 is located in front of the left frame portion 12 of the frame 10, and the other restricting member 60 is a right frame portion of the frame 10. 13 is fixed to the inside front. Since the fixing structure may be anything, the description is omitted. Each regulating member 60 includes a pressing portion 62 extending along the width direction when viewed from the front-rear direction, a first portion 611 extending along the vertical direction from the tip of the pressing portion 62, and the first portion 611. And a second portion 612 extending along the width direction from the tip. The said 1st part 611 and the 2nd part 612 construct | assemble the control part 61 which contacts the connection member 40 (left side part 41 and right side part 42). The second portion 612 is located below the pressing portion 62. The position (height) of the first portion 611 in the vertical direction is substantially the same as the position (height) of the left side portion 41 and the right side portion 42 of the connecting member 40.

  As described above, the left side portion 41 and the right side portion 42 of the connecting member 40 are urged outward in the width direction by the urging member 50. And the 1st part 611 of the control member 60 is located in the said biased side. Therefore, at the normal time (when a large load as described later is not applied), the left side portion 41 and the right side portion 42 of the connection member 40 are in contact with the first portion 611 of the regulating member 60. That is, the restricting member 60 restricts the left side portion 41 and the right side portion 42 from being displaced inward in the width direction from the inner surface of the first portion 611. Further, the second portion 612 of the regulating member 60 is located below the left side portion 41 and the right side portion 42 of the connection member 40 in the normal state. Therefore, when a large load that deforms the restricting member 60 is not applied, the second portion 612 of the restricting member 60 restricts the downward displacement of the left side 41 and the right side 42 by a predetermined amount or more. In the present embodiment, a contact portion 44 is provided in a portion of the left side portion 41 and the right side portion 42 of the connection member 40 that comes into contact with the regulating member 60. As will be described later, since the connecting member 40 slides on the surface of the regulating member 60, the contact portion 44 is provided to reduce the frictional resistance therebetween. However, such a contact portion 44 is not provided, and the left side portion 41 and the right side portion 42 may be in direct contact with the regulating member 60.

  The vehicle seat 1 according to the present embodiment includes slide assisting means in addition to the above components. The configuration of the slide assist means is as follows. A receiving shaft 70 that is an axis extending along the width direction is fixed to the frame 10. The receiving shaft 70 is a shaft having a circular cross section, and is fixed so as to bridge between the left side portion 41 and the right side portion 42. A rotating body 80 is rotatably supported on both sides of the receiving shaft 70 in the width direction. A flange 71 is formed on the receiving shaft 70, and the rotating body 80 is positioned on the outer side in the width direction than the flange 71. Therefore, the rotating body 80 does not move inward in the width direction with respect to the flange portion 71. The cross-sectional shape of the outer edge of the rotating body 80 is a square shape. In this embodiment, it is a hexagon.

  On the other hand, rolling members 45 are provided on the left side 41 and the right side 42 of the connecting member 40. The rolling member 45 is a member in which balls arranged in the circumferential direction are supported on a cylindrical main body portion formed of a hard material. The ball can rotate relative to the body portion. In the present embodiment, a plurality of balls are provided only on the lower side of the main body portion. The rolling member 45 is located above the rotating body 80.

  Although the operation of the vehicle seat 1 having such a configuration partially overlaps with the above description, it will be described in detail below. When the occupant shown in FIG. 3 is not seated or during normal seating shown in FIG. 4 (when a large load is not applied to the pad 20), the left side portion 41 and the right side portion 42 of the connecting member 40 are restricted members. It is in the state which contacted 60 1st part 611, and cannot be displaced to the width direction outer side any more. A tension corresponding to the positions of the left side 41 and the right side 42 is generated on the support member 30 stretched between the left side 41 and the right side 42. The tension is set so that it does not sink too much and does not repel too much when the occupant is seated.

  When the vehicle on which the vehicle seat 1 according to this embodiment is mounted collides with another vehicle or obstacle ahead, or suddenly brakes, the vehicle in which the occupant's body suddenly decelerates due to inertia, that is, It is displaced to the front side with respect to the vehicle seat 1. That is, a large load is applied to the front side of the seat cushion by an occupant who is displaced relatively to the front side by the inertia.

  When such a load is applied to the seat cushion, the front side portions of the left side portion 41 and the right side portion 42 of the connecting member 40 (the portion provided with the contact portion 44 in this embodiment) tend to be displaced downward. When the left side portion 41 and the front side portion of the right side portion 42 of the connecting member 40 are to be displaced downward, the second portion 612 of the regulating member 60 positioned below the front portion is pushed. When the load is increased, the regulating member 60 is deformed so that the second portion 612 is displaced downward (see FIG. 5 (particularly, FIG. 5B)). When the regulating member 60 is deformed by a predetermined amount or more, the second portion 612 of the regulating member 60 does not exist below the front side portions of the left side portion 41 and the right side portion 42 of the connecting member 40, and the left side portion 41 and the right side of the connecting member 40 are removed. The part 42 is further displaced downward (see FIG. 6 (particularly, FIG. 6B)). The connecting member 40 may be displaced until the left side portion 41 and the right side portion 42 of the connecting member 40 come into contact with the receiving shaft 70 fixed to the frame 10 (see FIG. 6 (particularly, FIG. 6C)).

  When the left portion 41 and the right portion 42 of the connecting member 40 are displaced in this way, the connecting member 40 is in contact with the restricting member 60, that is, the first portion 611 of the restricting member 60 causes the left portion 41 and the right portion of the connecting member 40 to move. The state where the displacement of the portion 42 to the outside in the width direction is restricted is eliminated. Therefore, the left side 41 and the right side 42 of the connecting member 40 are displaced outward in the width direction by the biasing force of the biasing member 50 (see FIG. 7 (particularly FIG. 7B)).

  In the present embodiment, the left side 41 and the right side 42 of the connecting member 40 are smoothly displaced by the above-described slide assisting means. Specifically, it is as follows. When the left side 41 and the right side 42 of the connecting member 40 are displaced downward, the rolling member 45 provided on them contacts the rotating body 80. Since the rotating body 80 is rotatable with respect to the receiving shaft 70, the rotating body 80 is rotated to a position where the ball of the rolling member 45 is in point contact. That is, the left side portion 41 and the right side portion 42 of the connection member 40 are in a state as if they are in point contact with the receiving shaft 70 via the rolling member 45 and the rotating body 80. That is, since the apparent frictional resistance between the connecting member 40 and the receiving shaft 70 is reduced, the left side portion 41 and the right side portion 42 of the connecting member 40 are smoothly displaced outward in the width direction by the biasing force of the biasing member 50. (See FIG. 7 (particularly FIG. 7C)).

  As described above, when the left side portion 41 and the right side portion 42 of the connection member 40 are displaced outward in the width direction, the support member 30 connected thereto is pulled in the width direction. That is, the tension of the support member 30 becomes larger than that at the normal time. Since the displacement amount of the left side portion 41 and the right side portion 42 is larger on the front side than the rear side connected by the rear side portion 43, the change in tension in the support member 30 is greater on the front side than on the rear side. The occupant intending to move downward in the front side is supported by the support member 30 having increased tension (see FIG. 7 (particularly, FIG. 7A)). Thus, according to the vehicle seat 1 according to the present embodiment, the safety when a large load is applied (without providing a member such as the front panel described in Patent Document 1) is improved. Can do.

  Even if the left side portion 41 and the right side portion 42 of the connecting member 40 displaced outward in the width direction are displaced upward in an attempt to return to the original height after being displaced downward, the regulation of the regulating member 60 is restricted. The upward displacement is surely prevented at a predetermined position by the portion 61 and the pressing portion 62 (see FIG. 7 (particularly, FIG. 7B)).

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention.

  The vehicle on which the vehicle seat 1 according to the above embodiment is mounted may be any vehicle such as an automobile, a railway vehicle, and an aircraft.

  In the vehicle seat 1 according to the above-described embodiment, when the connection members 40 are connected to both sides in the width direction of the support member 30 and the regulating member 60 is deformed by a predetermined amount, the connection members 40 on both sides in the width direction are displaced outward in the width direction. Although it has been described that the tension of the support member 30 increases as a result, the connection member 40 may be connected to both sides of the support member 30 in the front-rear direction. Moreover, it is good also as a structure where the connection member 40 was connected to the width direction both sides and the front-back direction both sides. Moreover, it is good also as a structure where the connection member 40 was connected only to one side instead of the both sides of a certain direction. Even when the connection member 40 is connected to only one side, it is possible to construct a configuration in which the tension of the support member 30 increases when the connection member 40 is displaced.

  The vehicle seat 1 according to the above embodiment is provided with a structure for supporting an occupant assuming that an event in which a large load is applied to the front side of the seat cushion. By providing it on the rear side, safety when an event in which a large load is applied to the rear side of the seat cushion occurs (for example, when a vehicle on which the vehicle seat 1 is mounted collides with another vehicle from behind) It is possible to improve the property.

  In the vehicle seat 1 according to the above-described embodiment, it has been described that the contact state between the connection member 40 and the restriction member 60 is eliminated when the restriction member 60 is deformed by a predetermined amount or more. However, the contact state is eliminated. The event may be other than the deformation of the restricting member 60.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 10 Frame 20 Pad 30 Support member 40 Connection member 41 Left side part 42 Right side part 50 Energizing member 60 Restriction member 61 Restriction part 611 First part 612 Second part 62 Holding part

Claims (1)

A member having elasticity, and a support member for supporting the pad;
A connection member connected to an end of the support member;
A biasing member that biases the connection member;
A regulating member located on the side where the connecting member is urged by the urging member;
With
In normal times, the connection member urged by the urging member is in contact with the restriction portion of the restriction member,
The restriction portion of the restriction member is
A first portion for restricting movement of the connecting member in a direction biased by the biasing member;
A second part that regulates movement of the connecting member in the opposite direction of the side where the pad is located;
Have
An occupant's load is transmitted to the connection member via the pad, and the second member is pressed to deform the regulating member by a predetermined amount or more, thereby being urged by the urging member of the connection member. A direction in which the tension of the support member is increased by the urging force of the urging member by eliminating the contact state between the connecting member and the restricting portion of the restricting member when the first portion is not positioned on the direction side. The vehicle seat is characterized in that the connecting member is displaced.

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