JP5552814B2 - Vehicle seat cushion - Google Patents

Description

  The present invention relates to a vehicle seat cushion. More specifically, the present invention relates to a vehicle seat cushion in which a support wire member is installed on a frame-type cushion frame constituting a skeleton of a seat cushion, and the lower surface of a cushion pad is received and supported by the support wire member.

  This type of vehicle seat cushion is disclosed in, for example, Patent Document 1 below. In the cushion frame of the seat cushion disclosed in Patent Document 1 below, four seat cushion wires extending in the front-rear direction are arranged at intervals in the width direction, and front and rear ends thereof are welded to the cushion frame, respectively. The lower surface of the cushion pad is received and supported by these seat cushion wires.

JP 2001-128781 A

  By the way, there are various variations in seat cushions depending on the shape and elasticity of the seating surface or the presence or absence of various operating mechanisms such as a lifter mechanism that can move up and down, but there are fewer types of parts for each variation. In order to suppress this, the basic components of the seat frame are made common. For example, as a configuration of a cushion frame that can be commonly applied regardless of the presence or absence of a lifter mechanism, there is one in which rear portions of left and right lower arms are connected by rear rods. When a lifter mechanism is provided to such a cushion frame, rotation around the axis of the rear rod may be involved. However, if the support structure of the cushion pad in the conventional cushion frame is applied to such a cushion frame, the wire member supporting the lower surface of the cushion pad is welded to the rear rod, which prevents the rear rod from rotating. Therefore, the lifter mechanism cannot function.

  Therefore, the subject of the present invention is commonly applied to a seat cushion in which the lower surface of the cushion pad is supported by a support wire member installed on the cushion frame regardless of whether or not the seat cushion has an operation function such as a lifter mechanism. The support wire member is arranged as possible.

The present invention is a vehicle seat cushion in which a support wire member is installed on a frame-type cushion frame constituting a skeleton of a seat cushion, and the lower surface of a cushion pad is received and supported by the support wire member. The member includes a horizontal wire member that is spanned in the width direction at the rear portion of the cushion frame and is fixed to a side fixing portion of the cushion frame, and a vertical wire member that is disposed in the front-rear direction of the seat cushion. The joint fixed to the side fixing portion of the horizontal wire member extends upward along the inner surface of the side fixing portion of the cushion frame, and the vertical wire member is fixed to the front portion of the cushion frame. The horizontal wire member and the vertical wire member are fixed to a portion and connected to the horizontal wire member. The said side fixing portion of the cushion frame mounted in constant with the front fixing portion, characterized in that it is integrally formed.

  According to such a vehicle seat cushion, the transverse wire member arranged in the width direction is fixed to the side portion fixing portion of the cushion frame, and the longitudinal wire is connected to the transverse wire member and arranged in the front-rear direction. The member is fixed to the front fixing portion of the cushion frame. And the side part fixed part to which the vertical wire member was fixed, and the front part fixed part to which the horizontal wire member was fixed are integrally formed, and are set as a component part which cannot be displaced relatively. The component parts that cannot be displaced relatively include, for example, the side fixing part and the front part even when a lifter mechanism or the like is set and operated on the seat frame in order to add a lifting function or the like to the seat cushion. This means that the fixed part is not relatively displaced by rotation or the like. Since the support wire member does not interfere with the operation of the lifter mechanism or the like by being fixedly attached to the side fixing portion and the front fixing portion, it can be applied regardless of the presence or absence of the operation mechanism. Therefore, according to the arrangement configuration of the support wire member according to the present invention, it can be made common regardless of the presence or absence of an additional operation function.

  In such a vehicle seat cushion, it is preferable that the rear position of the cushion frame on which the lateral wire member is disposed is a position below the collar when the seated person is seated. In this case, it is easy to securely support the buttocks and ensure good sitting comfort.

  Further, in the vehicle seat cushion of the present invention, the horizontal wire member is fixed to the side fixing portion and both ends thereof are fixed to the cushion frame, whereas the vertical wire member is fixed to the cushion frame. Is a cantilever state in which only one of the front fixing part is directly fixed. Therefore, it is also preferable that the connecting portion between the horizontal wire member and the vertical wire member is connected so that the vertical wire member is positioned above the horizontal wire member. In that case, since the vertical wire member is supported from below by the horizontal wire member fixed to the cushion frame at both ends, the vertical wire member, the horizontal wire member, and the load against the seated person acting downward via the cushion pad Can be more reliably maintained.

According to the present invention, the arrangement configuration of the support wire member can be commonly applied regardless of whether the seat cushion has an operation function such as a lifter mechanism.
In addition, if the rear position of the cushion frame in which the horizontal wire member is disposed is a position below the buttocks when the seated person is seated, it is easy to ensure good sitting comfort.
In addition, when the vertical wire member is connected to the horizontal wire member at an upper position, the connection between the vertical wire member and the horizontal wire member can be more reliably maintained against the load of the seated person. .

1 is a perspective view of a vehicle seat according to an embodiment of the present invention. It is a top view of the cushion frame concerning the embodiment of the present invention. It is the III-III sectional view taken on the line of the seat cushion shown by FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the seat cushion 21 of the present embodiment constitutes a vehicle seat 11 that is mounted on a vehicle such as an automobile, together with a seat back 13 and a headrest (not shown) as a backrest, A seating surface 21a is formed. In each figure, FR, RR, and UP indicated by arrows indicate the front, rear, and upper sides of the seat cushion 21 that are determined with reference to the direction viewed from the seated person of the vehicle seat 11. In each figure, W indicated by an arrow indicates the width direction of the seat cushion 21.

  The seat cushion 21 includes a cushion frame 31 that forms a skeleton and a cushion pad 23 that forms a seating surface 21a, and a support wire member 41 that supports a lower surface 23b of the cushion pad 23, as shown in FIG. ing.

  As shown in FIG. 1, the cushion frame 31 forms a frame shape as a whole. Specifically, the cushion frame 31 includes a pair of plate-like lower arms 33a and 33b that are spaced apart in the width direction. The front portions of both lower arms 33a and 33b are connected by a front rod 35, and a front panel 37 constituting an upper surface 37a and a front surface 37b is installed at the front portion, and the rear portions of both lower arms 33a and 33b are They are connected by a rear rod 39. A support wire member 41, which will be described in detail later, is installed on the cushion frame 31, and supports the lower surface 23b (see FIG. 3) of the cushion pad 23. As shown in FIG. 1, the lower ends of the seat back frames 13 f are connected to the rear ends of the lower arms 33 a and 33 b via a reclining mechanism 27 so as to be tiltable. The cushion frame 31 is slidable in the front-rear direction with the lower arms 33a and 33b supported by a pair of slide rail structures 25 and 25 that are spaced apart from each other in the width direction on the floor surface of the passenger compartment.

  The cushion pad 23 is made of, for example, urethane foam, and is placed on the cushion frame 31. The upper surface 23 a forms the outer shape of the seat surface 21 a, and the lower surface 23 b is supported by the support wire member 41.

  As shown in FIG. 2 and the like, the support wire member 41 of the present embodiment has one horizontal wire member 43 disposed in the width direction when viewed in plan and two wires disposed in the front-rear direction. Vertical wire members 45, 47. When viewed three-dimensionally, the horizontal wire member 43 has a horizontal portion 43a extending in the width direction as shown in FIG. 1 and the like, an inclined portion 43b extending obliquely upward toward the outside, and an inner surface of the lower arm 33b. And a joint portion 43c extending upward along the two ends of the horizontal portion 43a. As shown in FIG. 2, the joint portions 43c and 43c at both ends are welded to the lower arms 33a and 33b and fixed to the cushion frame 31, and the lower surface 23b (see FIG. 3) of the cushion pad 23 mainly at the horizontal portion 43a. See). The horizontal wire member 43 is disposed at the rear part of the cushion frame 31, and the rear part position thereof is a position below the buttocks B of the seated person H. That is, a horizontal portion 43 a that mainly supports the lower surface 23 b of the cushion pad 23 is disposed extending in the width direction at a position below the heel portion B of the seated person H, and It is possible to support directly below.

  The two vertical wire members 45 and 47 have the same shape. Here, the shape of the vertical wire member 47 will be described with reference to FIG. When viewed three-dimensionally, the vertical wire member 47 includes a front joint portion 47a, an inclined portion 47b, and a central support portion 47c sequentially from the front. The front joint portion 47a is disposed substantially horizontally along the upper surface 37a of the front panel 37, the front end is welded to the upper surface 37a of the front panel 37, extends rearward as it is, and the rear end is the front rod 35. It reaches around the upper position. The center support portion 47 c is disposed substantially horizontally below the front joint portion 47 a at a substantially central position in the front-rear direction of the seat cushion 21, and the rear end is a horizontal portion of the horizontal wire member 43. 43a is welded crossing from above. The inclined portion 47b provided between the front joint portion 47a and the central support portion 47c is inclined rearward and connects the front joint portion 47a and the central support portion 47c provided at different levels. Yes.

  As shown in FIGS. 1 and 2, the two vertical wire members 45 and 47 are disposed apart in the width direction between the lower arms 33 a and 33 b. Each of the vertical wire members 45 and 47 has a front end portion 45d and 47d welded to the upper surface 37a of the front panel 37, and a rear end portion 45e and 47e welded to the upper side of the horizontal wire member 43 and fixed. Moreover, the connection wire member 49 is spanned and welded at a substantially intermediate position between the welded portions before and after the vertical wire members 45 and 47. The connecting wire member 49 stabilizes the overall shape of the support wire member 41 by regulating that the vertical wire members 45 and 47 are bent and the intermediate position is separated, and the connecting wire member 49 also stabilizes the lower surface of the cushion pad 23. 23b is received and supported. Therefore, the support wire member 41 having such a configuration receives the lower surface 23 b of the cushion pad 23 as a whole including the connecting wire member 49.

  As described above, the support wire member 41 has the rear end portions 45e and 47e of the vertical wire members 45 and 47 and the horizontal portion 45a of the horizontal wire member 43 joined by welding, and is provided at both ends of the horizontal wire member 43. The front portions 45d and 47d of the vertical wire members 45 and 47 constitute the front portion of the cushion frame 31 while the joint portions 43c and 43c are fixed to the lower arms 33a and 33b constituting both sides of the cushion frame 31 by welding. 37 is fixed by welding. That is, the lower arms 33a and 33b to which the horizontal wire member 43 is fixed correspond to the side fixing portion of the present invention, and the front panel 37 to which the vertical wire members 45 and 47 are fixed corresponds to the front fixing portion of the present invention. . In the cushion frame 31, the lower arms 33a and 33b and the front panel 37 are integrally formed by welding and cannot be relatively displaced. That is, even when the seat cushion 21 is slid to change the position in the vehicle interior, or the posture is changed by reclining the seat back 13 with respect to the seat cushion 21, the lower arms 33a and 33b and the front panel 37 The relative positional relationship of does not change. Although the illustrated cushion frame 31 does not have a lifter function for moving the seat cushion 21 up and down, the relative positional relationship does not change even when the lifter mechanism is provided.

According to the seat cushion 21 having the above configuration, the following operational effects are obtained.
Lower arms 33a and 33b, which are fixing portions of the support wire member 41 with respect to the cushion frame 31, and the front panel 37 are integrally formed and set as components that cannot be displaced relatively, and do not interfere with the operation of the seat cushion 21. . In particular, when a lifter mechanism capable of moving up and down is provided, the front rod 35 and the rear rod 39 may be rotated, but even in that case, the rotation of the front rod 35 and the rear rod 39 is not hindered, and the lifter mechanism Can be activated. That is, the cushion frame 31 of the present embodiment does not have a lifter function, but even if the cushion frame 31 has a lifter function, it is possible to adopt a structure for fixing the support wire member 41 to the cushion frame 31. is there. Therefore, the structure of the support wire member 41 with respect to the cushion frame 31 can be made common regardless of the presence or absence of the lifter mechanism. A lifter mechanism that moves the seat cushion 21 up and down with the rotation of the front rod 35 and the rear rod 39 is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-227208.

Further, since the horizontal portion 43a of the horizontal wire member 43 is disposed below the buttocks B of the seated person H, the horizontal wire member 43 can directly support the buttocks B, and the horizontal wire member 43 Since the rear end portions 45e and 47e of the vertical wire members 45 and 47 joined to the horizontal portion 43a reach at least a position below the buttocks B of the seated person H, the number of parts of the vertical and horizontal wire members constituting the support wire member 41 is increased. Even if there is little, the seat cushion 21 can be supported stably.
Further, the welded portions of the rear end portions 45 e and 47 e of the vertical wire members 45 and 47 and the horizontal wire member 43 are joined with the vertical wire members 45 and 47 positioned above the horizontal wire member 43. Therefore, it is easy to maintain the coupling more reliably against the load of the seated person H acting downward.

It should be noted that various other embodiments can be considered within the scope of the present invention without departing from the gist of the present invention.
For example, in the above-described embodiment, an example in which only one horizontal wire member 43 is provided has been described. However, a plurality of horizontal wire members may be disposed on the lower arms 33a and 33b.
Moreover, in the said embodiment, although the fixed position of the horizontal wire member 43 in the lower arm 33a, 33b is set to the inner surface of the lower arm 33a, 33b, it is not limited to this, For example, a horizontal wire is formed on the upper surface of the lower arm 33a, 33b. The member 43 may be fixed.
Moreover, although the example which provided the two vertical wire members 45 and 47 was shown in the said embodiment, a vertical wire member may be provided over the front panel 37 and the horizontal wire member 43, and one piece may be provided. It may be provided. Preferably, at least one of the horizontal wire member and the vertical wire member is set in plural. In this case, it is easy to ensure good ride comfort.
Further, the vertical wire members 45 and 47 may be bent into a hook shape by extending the rear end portions 45e and 47e, as indicated by two-dot chain lines 45f and 47f in FIG. Although not shown, the rear end portions 45e and 47e of the vertical wire members 45 and 47 may be extended to the rear end portion of the cushion frame 31 as long as they do not interfere with the rear rod 39.
Further, as shown by a two-dot chain line 46 in FIG. 2, the rear end portions 47e and 45e of the vertical wire members 45 and 47 may be connected and formed.
One or more connecting wire members 49 can be provided as necessary.

DESCRIPTION OF SYMBOLS 11 Vehicle seat 21 Seat cushion 21a Seat surface 23 Cushion pad 23a Upper surface 23b Lower surface 31 Cushion frame 33a, 33b Lower arm (side part fixing | fixed part)
35 Front rod 37 Front panel (front fixing part)
37a Upper surface 39 Rear rod 41 Support wire member 43 Horizontal wire members 45, 47 Vertical wire member 49 Connecting wire member H Seated person B Hip

Claims (3)

A vehicle seat cushion in which a support wire member is installed on a frame-type cushion frame constituting a skeleton of a seat cushion, and the lower surface of the cushion pad is received and supported by the support wire member,
The support wire member includes a horizontal wire member that is stretched in the width direction at the rear portion of the cushion frame and is fixed to a side fixing portion of the cushion frame, and a vertical wire member that is disposed in the front-rear direction of the seat cushion. A joint portion fixed to the side fixing portion of the cushion frame of the horizontal wire member extends upward along the inner surface of the side fixing portion, and the vertical wire member is connected to the cushion frame. The side fixing part and the front part of the cushion frame fixed to the front fixing part and connected to the horizontal wire member and fixedly attached to the horizontal wire member and the vertical wire member. The vehicle seat cushion is formed integrally with the portion fixing portion. The vehicle seat cushion according to claim 1,
The vehicle seat cushion according to claim 1, wherein a rear position of the cushion frame on which the horizontal wire member is disposed is a position below the buttocks when a seated person is seated. The seat cushion according to claim 1 or 2,
The vehicle seat cushion according to claim 1, wherein the connecting portion between the horizontal wire member and the vertical wire member is connected so that the vertical wire member is located above the horizontal wire member.

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