JP3576937B2 - Seat, cushion, frame - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a seat cushion frame suitable for a vehicle seat, in particular, an automobile seat.
[0002]
[Background Art]
Seat cushion frames used for automobile seats are stretched between the left and right frame sides with S-shaped springs, formed wires, etc., or combined with coil springs and wire nets as appropriate. A structure that stretches between the sides is generally used to improve the comfort, but on the other hand, when a passenger restrained by a seat belt collides, there is a risk that a submarine phenomenon may occur where the passenger passes under the seat belt. .
[0003]
[Problems of the Invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a seat cushion frame capable of increasing the strength by reducing the weight and preventing the submarine phenomenon from occurring.
[0004]
Means corresponding to the problem and operation thereof
The present invention is located on the front side of the left and right frame sides, is thicker than the left and right frame sides, is flush with the outer surfaces of the left and right frame sides, and is downwardly positioned on the left and right frame sides. And left and right front projections that are perforated and perforated so that the seat track can be assembled, and at the right and left front and left sides of the frame near the left and right front projections A front cross beam extending between the frame sides and forming a groove between each end and each of the left and right frame sides and being fixed at both ends to at least the left and right front projections; And secure the thickness of the seat and track attachment points to reduce the weight. When a load is applied to the front cross beam, the load can be transmitted to the seat track via the left and right front projections, and in the event of a collision, the occupant restrained by the seat belt can be transferred to the front cross beam. The beam stops the occupant from passing under the seat belt.
[0005]
[Explanation of specific example]
Hereinafter, a seat cushion frame according to the present invention will be described based on a specific example shown and illustrated. FIGS. 1 to 5 show a seat cushion frame according to the present invention which is used for a front seat of a passenger car. A concrete example 10 of a cushion frame is shown, and the weight of the seat cushion frame 10 is reduced by casting a magnesium alloy. Specifically, the seat cushion frame 10 is set to the contour of the frame at the curved frame front 11, the straight frame rear 12, and the left and right frame sides 13, 14, and furthermore, at the left and right. Die casting with a structure including front projections 15, 16, a front cross beam 17, a top flange 18, and a bottom flange 19, 20 and injecting a molten magnesium alloy into a mold under high pressure Manufactured in. Of course, the seat cushion frame 10 may be cast from an aluminum alloy or other lightweight alloy and may be molded from a reinforced resin. The seat cushion frame 10 can be divided into a plurality of appropriate members, and each member can be formed by sheet metal molding and assembled by welding.
[0006]
More specifically, in the seat cushion frame 10, the left and right front projections 15 and 16 are located on the side of the frame front 11 of the left and right frame sides 13 and 14, and the left and right frame The left and right frame sides 13, 14 are thicker than the side 13, 14, and are protruded downward into the left and right frame sides 13, 14, flush with the outer surfaces 21, 21 of the left and right frame sides 13, 14, and are punched. The front cross beam 17 can be attached to the front end of a truck (not shown), and its front cross beam 17 is located between the left and right frame sides 13 and 14 near the left and right front projections 15 and 16. Elongation, and a lightening groove 30 between each of the beam ends 28, 28 and their left and right frame sides 13, 14. To form a 30 are integrated into the front projection 15, 16 of at least the left and right that the beams ends 28, 28.
[0007]
The left and right frame sides 13, 14 have bolt holes 24, 24 in the left and right front projections 15, 16 and bolt holes 25, 25 below the rear ends 23, 23, respectively. At 24, 24 and 25, 25, the seat track is bolted to the front and rear ends of the slide rails to allow the seat track to be assembled. Also, the left and right frame sides 13, 14 drill a pair of bolt holes 26, 26 above the rear ends 23, 23, and the left frame side 13 has the pair of bolt holes 26, 26. And the right frame side 14 bolts the hinge bracket of the free hinge (not shown) with the pair of bolt holes 26 and 26 respectively. A seat back frame (not shown) can be assembled.
[0008]
The left and right front projections 15, 16 protrude from the inner side surfaces 22, 23 of the left and right frame sides 13, 14 as shown in FIG. Also, the thickness is set to be large, and the strength required for mounting the seat track is secured.
[0009]
The front cross beam 17 not only reinforces the entire frame, but also receives an occupant restrained by the seat belt and prevents the occupant from passing under the seat belt in the event of a collision. The load by the occupant at that time is transmitted to the seat track via the left and right front projections 15 and 16. Also, as shown in FIG. 3, the front cross beam 17 hardly causes stress concentration on the left and right frame sides 13 and 14 and the left and right front projections 15 and 16 to reduce the weight. And, an integral connection structure of the two beam ends 28, 28 for ensuring the strength is adopted. For this purpose, the front cross beam 17 extends between the left and right frame sides 13, 14 at an appropriate distance from the left and right frame sides 13, 14 near the left and right front projections 15, 16. And between the two beam ends 28, 28 and the left and right frame sides 13, 14, respectively, are formed the lightening grooves 30, 30 so that the left and right front ends are formed at the two beam ends 28, 28. The projections 15 and 16 are integrated. The lightening grooves 30, 30 are made longer than the beam width of the front cross beam 17, and are extended back and forth as viewed from both beam side surfaces 27, 27 thereof, so that the left and right front projections 15, 30 are formed. 16 is opened. In addition, the front cross beam 17 projects on each of the two beam ends 28, 28 flush with its two beam sides 27, 272, and extends across the lightening grooves 30, 30. Are integrated with the left and right frame sides 13, 14 at the end gussets 31, 31 and 31, 31.
[0010]
Still further, the front cross beam 17 has a hat-shaped cross section and is continuously changed into a cross section of required strength over the entire length of the beam. In particular, the front cross beam 17 is designed in the form of a cross section having the required strength that changes the height of the cross section over the entire length of the beam in accordance with the bending moment of each part in the longitudinal direction. That is, the front cross beam 17 is changed over the entire length of the beam in the form of a cross section where the height of the cross section of its beam center 29 is longer than that of its two beam ends 28, 28, and It is designed to have the required strength for weight reduction. Of course, the front cross beam 17 may vary the length of the flange over the entire length of the beam. This front cross beam 17 can also be designed in the form of a channel in cross section.
[0011]
The front cross beam 17 is offset into the bolt holes 24, 24 of the front seat track attachment points, ie, the left and right front projections 15, 16, between the left and right frame sides 13, 14. When the load is applied, the moment due to the load acts on the frame sides 13, 14, the front projections 15, 16, and the front cross beam 17. Is located on the axis of its point of attachment, i.e. on the axis through its bolt holes 24, 24, so that its moment due to its load does not act on them, resulting in a rational structure.
[0012]
Its top flange 18 projects outwardly from its curved frame front 11 and its left and right frame sides 13, 14, while its bottom flanges 19, 20 are attached to its curved frame front 11, its It protrudes inward from the straight frame rear 12 and the left and right frame sides 13 and 14. The bottom flange 20 has a plurality of elongated holes 29, 29, 29 and 29, 29, 29 at the left and right frame sides 13, 14 at appropriate intervals in the front-rear direction. Each of the long holes 32, 32, 32 and 32, 32, 32 is fitted with a clip (not shown), and a spring terminal is hooked on the clip, and a plurality of clips are inserted between the left and right frame sides 13, 14. S-shaped spring (not shown).
[0013]
As such, the seat cushion frame 10 has its front cross beam 17 reduced in weight and increased in strength, as well as its front cross beam 17 has its two beam ends 28, 28. The left and right front projections 15, 16 are provided with opening grooves 30, 30 between the left and right frame projections 13, 14 so that the left and right front projections 15, 16 have both beam ends 28. , 28 are integrated, so that the left and right front projections 15, 16 and the left and right frame sides 13 near the two beam ends 28, 28 are employed. , 14 are less likely to cause stress concentration and are reduced in weight, and the left and right front projections 15 Strength to the mounting portion of the seat track 16 is secured.
[0014]
Further, in the front seat using the seat cushion frame 10 as a seat cushion, in the event of a collision, the occupant restrained by the seat belt is received by the front cross beam 17 and the occupant is seated on the seat cushion. The submarine phenomenon that passes under the belt is prevented beforehand. The load by the occupant at that time is transmitted to the seat track via the left and right front projections 15 and 16. Of course, the seat cushion frame 10 is appropriately modified and applied to various vehicle seats.
[0015]
As will be apparent from the specific embodiments of the present invention described above with reference to the drawings, the contents of the present invention will be limited to those skilled in the art to which the present invention belongs. , And are readily embodied in other aspects that are objectively recognized as including them. Of course, the subject matter of the present invention corresponds to the problem of the present invention (become with with), and is essential for the establishment of the present invention.
[0016]
[Benefits of the Invention]
As understood from the above description, the seat cushion frame of the present invention is located on the frame front side of the left and right frame sides, is thicker than the left and right frame sides, and has the left and right frame sides. The left and right front projections are flush with the outer side and protrude downward to the left and right frame sides and are perforated to allow the seat truck to be assembled, and the left and right near the left and right front projections Extending between the left and right frame sides at an appropriate distance from the frame side, and forming a groove between both ends and each of the left and right frame sides so that at both ends at least the left and right sides The front cross beam fixed to the front projection In the cushion frame, the load applied to the front cross beam can be transmitted to the seat track via the left and right front projections, reducing the weight of the entire frame and increasing the strength. And, it can be applied to various vehicle seats by being appropriately deformed, and between the both ends and the left and right frame sides, the left and right front projections are opened with the groove, and the left and right sides are opened. The structure that integrates both ends into the front projection of the left and right front projections near the both ends and the left and right frame sides are less likely to cause stress concentration, resulting in a lighter weight. Strength is secured at the seat / track attachment point, and at the time of collision, The occupant restrained by the seat belt is received by the front cross beam and the submarine phenomenon where the occupant passes under the seat belt is prevented beforehand, so that it is very useful for the vehicle seat It is practical.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a specific example of a seat cushion frame of the present invention which is used for a front seat of a passenger car.
FIG. 2 is a partial perspective view showing the seat cushion frame shown in FIG.
FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;
FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;
FIG. 5 is a sectional view taken along the line 5-5 in FIG. 3;
[Explanation of symbols]
11 Curved frame front 12 Straight frame rear 13 Left frame side 14 Right frame side 15 Left front projection 16 Right front projection 17 Front cross beam 30 Lightening groove 31 End gusset

Claims (4)

It is located on the frame front side of the left and right frame sides, it is thicker than the left and right frame sides, and protrudes downward on the left and right frame sides flush with the outer surfaces of the left and right frame sides, The left and right front projections are drilled to allow the seat track to be assembled, and the left and right front projections are separated from the left and right frame sides by an appropriate distance between the left and right frame sides. A seat extending between the two ends and a front cross beam that forms a groove between each end and each of the left and right front sides and is integrated at both ends into the left and right front projections;・ Cushion frame. The front cross beam is further integrated into the left and right frame sides with a pair of end gussets protruding at both ends flush with both side surfaces and extending across the groove. The seat cushion frame according to claim 1, wherein 2. The seat cushion frame of claim 1, wherein the front cross beam is formed in a cross-sectional channel shape. 2. The seat cushion frame according to claim 1, wherein the front cross beam is formed in a hat-shaped cross section.

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