JP2007216811A - Seat cushion frame for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a seat cushion frame for a vehicle capable of being used as both of a frame which suspends springs and a frame which does not suspend the springs. <P>SOLUTION: When a plate spring 26 is attached to a cushion panel 22, at least a part of a load to a cushion pad 30 due to a seated occupant is supported by the plate spring 26. When the plate spring 26 is detached from the cushion panel 22, the load to the cushion pad 30 due to the seated occupant is supported by the cushion panel 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat cushion frame that supports a cushion pad of a seat cushion.

  In the vehicle seat, a seat cushion frame is provided in order to place a cushion pad of the seat cushion (see, for example, Patent Document 1). In such a seat cushion frame, the frame is formed of a panel. For example, an opening is formed corresponding to the bottom area, and a spring is installed in the opening.

In this conventional seat cushion frame, if the spring is not installed, the cushion pad support surface corresponding to the bottom area is lost. Can not do it.
JP 2001-245744 A

  In view of the above-described facts, an object of the present invention is to provide a vehicle seat cushion frame that can be used as both a frame without a spring and a frame with a spring.

  The vehicle seat cushion frame according to the first aspect of the present invention includes a cushion panel capable of supporting a cushion pad of a seat cushion in a seated state of an occupant, and detachably attached to the cushion panel, and attached to the cushion panel. In a state, it has a spring member which can support at least a part of the cushion pad.

  According to the vehicle seat cushion frame of the first aspect of the present invention, when the spring member is attached to the cushion panel, at least a part of the load applied to the cushion pad by the seated occupant is supported by the spring member. The When the spring member is removed from the cushion panel, the load applied to the cushion pad by the seated occupant is supported by the cushion panel. As described above, the vehicle seat cushion frame according to the present invention can take both the form in which the spring member is attached to the cushion panel and the form in which the spring member is not attached to the cushion panel.

  The vehicle seat cushion frame according to a second aspect of the present invention is the vehicle seat cushion frame according to the first aspect, wherein the intermediate portion of the spring member is a concave portion whose side view is curved downward when attached to the cushion panel. It is characterized by being shaped.

  According to the vehicle seat cushion frame of the second aspect of the present invention, when the spring member is attached to the cushion panel, the load applied to the cushion pad by the seated occupant is the intermediate portion of the spring member curved downward. Bend down elastically. As a result, the seating feeling of the occupant is improved.

  A vehicle seat cushion frame according to a third aspect of the present invention is the configuration according to the first or second aspect, wherein the cushion pad support range of the cushion panel extends in the front-rear direction of the seat cushion. A long hole arranged in the width direction is formed, and when the spring member is attached to the cushion panel, the spring member is spanned across the long hole in the front-rear direction of the seat cushion.

  According to the vehicle seat cushion frame of the third aspect of the present invention, when the spring member is attached to the cushion panel, at least a part of the load applied to the cushion pad by the seated occupant is supported by the spring member. When the load is large, the spring member bends below the long hole and the contact between the spring member and the cushion panel is avoided. When the spring member is removed from the cushion panel, the load applied to the cushion pad by the seated occupant is supported by the cushion panel on the side of each elongated hole.

  A vehicle seat cushion frame according to a fourth aspect of the present invention is the configuration according to any one of the first to third aspects, wherein a plurality of types of the spring members are detachable from the cushion panel. It is characterized by.

  According to the vehicle seat cushion frame of the fourth aspect of the present invention, since a plurality of types of spring members can be attached to and detached from the cushion panel, the height and spring constant of the spring member can be changed by changing the spring member. By changing it, you can change the seating feeling of the occupant.

  As described above, the vehicle seat cushion frame according to the first aspect of the present invention has an excellent effect that it can be used as both a frame on which no spring is installed and a frame on which the spring is installed.

  According to the vehicle seat cushion frame of the second aspect, the seating feeling of the occupant in the attached state of the spring member can be improved.

  According to the vehicle seat cushion frame of the third aspect, since the contact between the spring member and the cushion panel can be avoided when the spring member is seated in the mounted state, it is possible to prevent the spring member from wearing and the contact noise from being generated. It has an excellent effect of being able to.

  According to the vehicle seat cushion frame of the fourth aspect, the thickness of the cushion pad can be changed by changing the height of the spring member by changing the spring member, and the spring constant can be changed by changing the spring member. Thus, since the setting of the urging force can be changed, there is an excellent effect that it becomes possible to easily cope with the specification of the seat.

  An embodiment of a vehicle seat cushion frame according to the present invention will be described with reference to the drawings. In the figure, the arrow UP indicates the upward direction of the vehicle, and the arrow FR indicates the forward direction of the vehicle.

(Configuration of the embodiment)
As shown in FIG. 1, a vehicle seat 10 includes a seat cushion 12 that supports the occupant's buttocks, and a seat back 14 that is tiltably supported by the rear end portion of the seat cushion 12 and supports the back of the occupant. The headrest 16 is provided so as to be vertically adjustable at the upper end of the seat back 14 and supports the head of the passenger.

  The seat cushion 12 includes a vehicle seat cushion frame (hereinafter simply referred to as “seat cushion frame”) 20 shown in FIGS. 1 and 2, and the seat cushion frame 20 has a seat as shown in FIG. 3. A cushion pad 30 constituting a part of the cushion 12 is placed. The cushion pad 30 is made of urethane foam or the like, and creates the shape of the seat cushion 12 (see FIG. 1) and plays the role of a cushion. The cushion pad 30 is applied with different hardness depending on the part. The surface of the cushion pad 30 is covered with a cushion cover 32 as a seat skin.

  As shown in FIG. 2, the seat cushion frame 20 includes a substantially deep dish-shaped cushion panel 22. The cushion panel 22 is obtained by bending a sheet metal (thin steel plate) by press molding, and a region corresponding to the occupant's bottom is a concave portion 23 that is recessed downward. The bottom 23A of the recess 23 is substantially horizontal, and a gentle inclined portion 23B is formed from the periphery of the recess 23 toward the bottom 23A. The cushion panel 22 has a flat front portion 22A corresponding to the lower part of the thigh of the occupant.

  As shown in FIG. 4, a total of two long holes 24 are formed through the bottom 23 </ b> A in the support range of the cushion pad 30 (see FIG. 3) in the cushion panel 22. The long holes 24 extend in the front-rear direction (arrow 12X direction) of the seat cushion 12 (see FIG. 1) and are arranged in the width direction (arrow 12Y direction), and the width direction in the cushion panel 22 (the same direction as the arrow 12Y direction). It is formed symmetrically with respect to a center line passing through the center of. In the present embodiment, the long hole 24 has a substantially rectangular shape in plan view.

  The cushion panel 22 in which the long holes 24 are formed can support the cushion pad 30 (see FIG. 3) in a seated state of the occupant. Here, the long hole 24 has such a size and shape that the cushion pad 30 (see FIG. 3) does not fall downward even if the cushion pad 30 (see FIG. 3) in the seated state of the occupant is supported only by the cushion panel 22. Is formed.

  A through hole 25 for inserting a bolt is formed in the bottom 23A of the cushion panel 22 on both sides of the cushion panel 22 in the front-rear direction (the same direction as the arrow 12X) with the long hole 24 interposed therebetween. As shown in FIG. 3, a leaf spring 26 as a spring member is detachably attached to the cushion panel 22 by bolts 27 and nuts 28 as fixing means. The bolt 27 penetrates the through hole 25 of the cushion panel 22 and the through hole 26A of the leaf spring 26 from the back side of the cushion panel 22, and a nut 28 is fitted into the tip of the bolt 27 and is tightened. A spring 26 is attached to the cushion panel 22.

  The leaf spring 26 is formed by bending a thin and long thin rectangular steel material, and both end portions 26B attached by bolts 27 and nuts 28 are flat and rise from the both end portions 26B by being bent at substantially right angles. While having the upright part 26C, the middle part 26D in the longitudinal direction between the upright parts 26C has a concave shape curved downward in a substantially arc shape.

  In the present embodiment, the dimension between the through holes 26 </ b> A of the leaf spring 26 and the dimension between the through holes 25 of the cushion panel 22 before installation are equal to each other. Similarly to the shape before mounting, the shape of the leaf spring 26 in a side mounted state on the cushion panel 22 is also a concave shape in which the intermediate portion 26D is curved downward. As shown in FIG. 2, when the leaf spring 26 is attached to the cushion panel 22, the leaf spring 26 is stretched over the long hole 24 in the front-rear direction (arrow 12X direction) of the seat cushion 12 (see FIG. 1). As shown in FIG. 3, the leaf spring 26 can support at least a part of the cushion pad 30.

  Here, a plurality of types of leaf springs 26 having different spring heights and spring constants can be attached to and detached from the cushion panel 22. Accordingly, the thickness of the cushion pad 30 can be changed by changing the height of the leaf spring 26 by changing the leaf spring 26, and the biasing force can be set by changing the spring constant by changing the leaf spring 26. Since it can be changed, it is possible to easily correspond to the specification of the vehicle seat 10 (see FIG. 1) with one type of cushion panel 22.

  A felt 31 is attached to the back surface of the cushion pad 30 so as to correspond to the upper portion of the intermediate portion 26D of the leaf spring 26. In the passenger seated state, the felt 31 comes into surface contact with the concave surface of the intermediate portion 26D, and the felt 31 comes into contact with the boundary portion between the intermediate portion 26D and the upright portion 26C and the edge portion of the intermediate portion 26D. The felt 31 prevents the back surface of the cushion pad 30 from being cut by contact with the leaf spring 26 and prevents the seated occupant from feeling against the leaf spring 26.

(Operation of the embodiment)
Next, the operation of the above embodiment will be described.

  When the leaf spring 26 is attached to the cushion panel 22, the load applied to the cushion pad 30 by the seated occupant is supported by the leaf spring 26 at least partially, and the intermediate portion 26D of the leaf spring 26 curved downward is moved downward. To bend elastically. Here, since the leaf spring 26 is stretched over the long hole 24 along the front-rear direction (arrow 12X direction) of the seat cushion 12, it bends in a substantially arc shape when viewed from the side, depending on the lower buttocks load by the occupant. The cushion pad 30 is elastically supported. By these, a passenger | crew's seating feeling becomes favorable.

  When the load applied to the cushion pad 30 by the seated occupant is large, the leaf spring 26 is deflected below the elongated hole 24 and contact between the leaf spring 26 and the cushion panel 22 is avoided. For this reason, it is possible to prevent wear of the leaf spring 26 and generation of contact noise (abnormal noise) between the leaf spring 26 and the cushion panel 22.

  Since a plurality of types of leaf springs 26 can be attached to and detached from the cushion panel 22, changing the height and spring constant of the leaf springs 26 by changing the leaf springs 26 can change the seating feeling of the occupant. Can do.

  When the leaf spring 26 is removed from the cushion panel 22 (see FIG. 4), the load applied to the cushion pad 30 by the seated occupant is supported by the cushion panel 22 at the side of each long hole 24 or the like.

  As described above, according to the cushion panel 22 of the present embodiment, it can be used as both a frame without a spring and a frame with a spring.

(Other embodiments)
In addition, in order to avoid contact | abutting with the leaf | plate spring 26 and the cushion panel 22, it is preferable to form the long hole 24 like the said embodiment in the cushion panel 22, However, The long hole 24 is formed in the cushion panel 22. It is also possible to adopt a configuration that does not. Moreover, in the said embodiment, although the two long holes 24 are formed in the cushion panel 22 in total, the long hole is the state which supported the cushion pad of the passenger | crew's seating state only by the cushion panel (state which does not attach a spring member) ), The cushion pad may be formed in a size and shape that does not fall down downward, and is not necessarily limited to two.

  In the above-described embodiment, the case where the spring member is the leaf spring 26 has been specifically described as an example. However, the spring member is, for example, a spring stretched in a planar shape such as a so-called S spring curved in a wave shape. Other spring members such as members may be used.

  Furthermore, in the said embodiment, although the shape before the attachment to the cushion panel 22 in the intermediate part 26D of the leaf | plate spring 26 is a concave shape curved downward, for example, it is to the cushion panel in the intermediate part of a leaf | plate spring. The shape before mounting is flat, and the dimension between the through holes of the leaf spring before installation is set longer than the dimension between the through holes of the cushion panel. May be bent downward to form a concave shape in side view.

  Furthermore, in the above embodiment, the leaf spring 26 as the spring member is detachable from the cushion panel 22 by the bolt 27 and the nut 28. For example, an engaging portion is formed at the end of the spring member. In addition, an engagement portion that can be engaged with the engagement portion is formed in the attachment portion of the spring member in the cushion panel, and the spring member is attached by engaging the engagement portion and the engagement portion. The spring member may be attached to and detached from the cushion panel by other attaching / detaching means such as removing the spring member by releasing the engagement between the engaging portion and the engaged portion.

1 is a perspective view showing a vehicle seat to which a vehicle seat cushion frame according to an embodiment of the present invention is applied. 1 is a perspective view showing a vehicle seat cushion frame according to an embodiment of the present invention. (Shown with leaf spring attached.) It is sectional drawing which shows the vehicle seat cushion frame which concerns on embodiment of this invention. (This corresponds to the cross section taken along line 3-3 in FIG. 2.) 1 is a perspective view showing a vehicle seat cushion frame according to an embodiment of the present invention. (Shown with the leaf spring removed)

Explanation of symbols

12 Seat cushion 12X Front and rear direction of seat cushion 12Y Width direction 20 Seat cushion frame (vehicle seat cushion frame)
22 Cushion panel 24 Long hole 26 Leaf spring (spring member)
26D Intermediate part 30 Cushion pad

Claims (4)

A cushion panel that can support the cushion pad of the seat cushion in the seated state of the occupant;
A spring member that is detachably attached to the cushion panel and can support at least a part of the cushion pad in the attached state to the cushion panel;
A vehicle seat cushion frame comprising:   2. The vehicle seat cushion frame according to claim 1, wherein an intermediate portion of the spring member has a concave shape in which a shape in a side view when attached to the cushion panel is curved downward.   A long hole extending in the front-rear direction of the seat cushion and arranged in the width direction is formed in the support range of the cushion pad in the cushion panel. When the spring member is attached to the cushion panel, the spring member is The vehicular seat cushion frame according to claim 1 or 2, wherein the vehicular seat cushion frame is bridged in a longitudinal direction in the longitudinal direction of the seat cushion.   The vehicle seat cushion frame according to any one of claims 1 to 3, wherein a plurality of types of the spring members are detachable from the cushion panel.

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