JP2023167611A - vehicle seat - Google Patents

Abstract

[Problem] To obtain a vehicle seat that can improve seating comfort and improve recyclability. [Solution] Wing portions 22A, 24A that are bent in a substantially "U" shape and inclined outward and upward in the seat width direction, and a substantially "L" shape that is continuous from the inner end of the wing portions 22A, 24A in the seat width direction. A metal cushion spring 20, which includes outer spring members 22 and 24 having folded portions 22B and 24B bent in a character shape, and is installed between the front and rear parts of the seat cushion 12, and a main body. 32 and a sloped part 34 that slopes outward and upward in the seat width direction from the outer end of the main body part 32 in the seat width direction, and the first fitting part 34A formed in the sloped part 34 is connected to the wing part 22A, 24A, and the second fitting portion 32A formed in the main body portion 32 is fitted into the portions of the folded portions 22B and 24B extending in the seat width direction, thereby creating a cushion. A vehicle seat 10 includes a resin support member 30 attached to a spring 20. [Selection diagram] Figure 2

Description

The present invention relates to a vehicle seat.

Vehicle seats in which a cushion pan made of elastic synthetic resin is arranged in the central opening of a metal seat frame and the lower surface of the seat pad of the seat cushion is supported by the cushion pan are known from the past (for example, patented (See Reference 1). In this cushion pan, a spring material extending in the front and back direction is integrally molded on the front and rear support parts that extend from the front end to the rear end of the seat cushion, and a spring member that extends in the left and right direction from the left and right sides of the front and rear support parts extends diagonally upward. A spring member extending from the front is integrally molded. Therefore, the bending rigidity and torsional rigidity of the spring material are improved.

Japanese Patent Application Publication No. 2018-161936

However, in a cushion pan having such a configuration, the bending rigidity and torsional rigidity of the spring material are excessively high than necessary. Specifically, this cushion pan has a structure in which the spring material is embedded in the resin material and integrated, so even if the spring material flexes and deforms and attempts to receive the load, the resin material will resist the tensile force. The spring material is difficult to bend and deform due to the load applied to it. In other words, in such a cushion pan, the bending deformation (cushioning properties) of the spring material is inhibited more than necessary, and the sitting comfort cannot necessarily be said to be good. Furthermore, it is difficult to separate the resin material and the spring material, resulting in poor recyclability.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a vehicle seat that can improve sitting comfort and improve recyclability.

In order to achieve the above object, the vehicle seat according to claim 1 of the present invention is bent into a substantially "U" shape when viewed from above or from the bottom, and is inclined outwardly and upwardly in the width direction of the seat. The seat cushion includes a pair of left and right outer spring members each having a wing section that extends from the inner edge of the seat cushion, and a folded section that is continuously bent in an approximately "L" shape from the inner end of the wing section in the seat width direction. A metal cushion spring installed between the front part and the rear part, a flat main body part, and an inclined part that slopes from an outer end of the main body part in the seat width direction toward the outside and upward in the seat width direction; At least a first fitting portion formed on the inclined portion is fitted into a portion of the wing portion extending in the seat front-rear direction, and a second fitting portion formed on the main body portion is fitted on the folded portion. a support member made of resin and attached to the cushion spring by being fitted into a portion extending in the seat width direction of the cushion spring.

According to the invention described in claim 1, the metal cushion spring installed between the front part and the rear part of the seat cushion is bent into a substantially "U" shape when viewed from above or from the bottom. A pair of left and right outer spring members each having a wing portion that is inclined outwardly and upwardly in the width direction, and a folded portion that is continuously bent in a substantially “L” shape from the inner end portion of the wing portion in the sheet width direction. It is made up of. A support member made of resin having a flat main body portion and an inclined portion inclined outwardly upward in the seat width direction from an outer end portion of the main body portion in the seat width direction is provided at least in the inclined portion. By fitting the first fitting part to the part of the wing part extending in the seat front and rear direction, and fitting the second fitting part formed in the main body part to the part of the folded part extending in the seat width direction. , attached to the cushion spring.

Therefore, compared to a case where the spring material is embedded and integrated with the resin material, the bending deformation of the cushion spring is prevented from being inhibited more than necessary. This improves the cushioning properties of the seat cushion and improves sitting comfort. In addition, even if the wing section flexes and deforms when an occupant sits on the seat cushion, the support member is prevented from slipping relative to the cushion spring (displacement in the seat longitudinal direction and the seat width direction), and the support member also prevents the cushion spring from slipping. The bending stiffness and torsional stiffness of the material are effectively improved. Therefore, the supporting force (holding ability) for the occupant is also improved. Moreover, since the support member is attached to the cushion spring by fitting, it is easy to separate from the cushion spring, improving recyclability.

The vehicle seat according to claim 2 is the vehicle seat according to claim 1, in which the cushion spring is located at a position that is substantially the same as the wing portion in the front-rear direction of the seat when viewed from above or from the bottom. The structure also includes an inner spring member having a bent portion bent in a substantially “S” shape, and a third fitting portion formed in the main body portion is located in a portion of the bent portion extending in the seat front and rear direction. It is fitted.

According to the invention as set forth in claim 2, the cushion spring is an inner spring having a bent portion bent in a substantially “S” shape when viewed from above or from the bottom at a position that is substantially the same as the wing portion in the front and back direction of the seat. The third fitting portion formed in the main body portion is fitted into a portion of the bent portion extending in the front-rear direction of the seat. Therefore, even if the wing section is bent and deformed due to the occupant sitting on the seat cushion, the slippage of the support member relative to the cushion spring (displacement in the seat longitudinal direction and the seat width direction) is more effectively suppressed, and the support member is The bending rigidity and torsional rigidity of the cushion spring are more effectively improved by the member. Therefore, the supporting force (holding ability) for the occupant is more effectively improved.

Further, the vehicle seat according to claim 3 is the vehicle seat according to claim 1 or 2, wherein a reinforcing rib is formed at a boundary portion between the main body portion and the inclined portion. There is.

According to the third aspect of the invention, reinforcing ribs are formed at the boundary between the main body portion and the inclined portion of the support member. Therefore, since the rigidity of the support member can be increased, the supporting force (holding ability) for the occupant can be effectively improved.

As described above, according to the present invention, it is possible to improve seating comfort and improve recyclability in a vehicle seat.

FIG. 2 is a schematic side view showing the internal structure of the seat cushion of the vehicle seat according to the present embodiment. It is a schematic plan view which expands and shows the cushion spring and support member based on this embodiment. It is a schematic side view which expands and shows the cushion spring and support member based on this embodiment. It is a schematic front view which expands and shows the cushion spring and support member based on this embodiment.

Embodiments according to the present invention will be described in detail below with reference to the drawings. For convenience of explanation, the arrow UP shown as appropriate in each figure is the upward direction of the vehicle seat, the arrow FR is the front direction of the vehicle seat, and the arrow RH is the right direction of the vehicle seat. In the following explanation, when the directions of up and down, front and back, and left and right are described without special mention, it means the up and down direction of the vehicle seat, the front and back direction of the vehicle seat, and the left and right direction of the vehicle seat (seat This indicates the left and right sides (width direction).

As shown in FIG. 1, the vehicle seat 10 according to the present embodiment includes a seat cushion 12 that supports the buttocks and thighs of the occupant P, a seat back 18 that supports the back of the occupant P, and a seat back 18 that supports the back of the occupant P. The device includes a headrest (not shown) that supports the head. Note that the seat cushion 12 in this embodiment is used in a vehicle seat 10 such as an electric vehicle, and has a thin design in which a seat pad (not shown) is thinned to reduce weight.

A metal front panel 14 is provided at the front part on the lower surface side of the seat cushion 12 (seat pad) and has a substantially flat plate shape with the seat width direction (left and right direction) being the longitudinal direction, and at the rear part, A cylindrical rear pipe 16 is provided whose axial direction is in the seat width direction. A metal cushion spring 20 is installed between the front panel 14 and the rear pipe 16, and includes a plurality of (for example, three) spring members 22, 24, and 26 (see FIG. 2). There is.

As shown in FIG. 2, the cushion spring 20 includes elongated metal spring members 22, 24, and 26 each having a circular cross section and extending in the left-right direction and the front-back direction when viewed from above (or when viewed from the bottom). It is bent at a substantially right angle at a plurality of predetermined places so as to have a section. As shown in FIG. 1, a hook portion 21 and a hook portion 28 are integrally formed at the front and rear ends of each of the spring members 22, 24, and 26, respectively.

The hook portion 21 formed at the front end of each spring member 22, 24, 26 is connected to each locking hole (not shown) formed in a plurality (for example, three) in the rear end of the front panel 14 in a row in the left-right direction. are inserted and locked in each. Hook portions 28 formed at the rear ends of each of the spring members 22, 24, and 26 are respectively engaged with the rear pipe 16 from above.

Note that, hereinafter, the spring member 26 disposed at the central portion (center portion) in the seat width direction will be referred to as an “inner spring member”. The spring members 22 and 24, which are arranged in pairs on the left and right sides (outside in the seat width direction) of the inner spring member 26 at a predetermined interval and symmetrically, are respectively referred to as "outer spring members".

As shown in FIG. 2, the outer spring member 22 is bent into a substantially "U" shape when viewed from the bottom, at a position that supports the buttocks of the occupant P (opposing the buttocks of the occupant P in the vertical direction). It has a wing portion 22A that is inclined outwardly and upwardly in the seat width direction, and a folded portion 22B that is continuously bent in a substantially “L” shape from the inner end of the wing portion 22A in the seat width direction. .

Similarly, the outer spring material 24 is bent into a substantially "U" shape in plan view at a position supporting the buttocks of the occupant P (opposing the buttocks of the occupant P in the vertical direction), and is bent outward in the seat width direction. It has a wing section 24A that slopes upward, and a folded section 24B that is continuously bent into a substantially "L" shape from the inner end of the wing section 24A in the sheet width direction.

More specifically, the wing portions 22A and 24A include widthwise extending portions 22C and 24C that are bent outward in the seat width direction from the rear sides of the outer spring members 22 and 24, respectively, and extend in the seat width direction; Front and rear extending parts 22D and 24D that are bent forward from the outer ends of the widthwise extending parts 22C and 24C in the front and rear directions, and front ends of the front and rear extending parts 22D and 24D. It has width direction extending parts 22E and 24E which are bent inward in the seat width direction from the seat part and extend in the seat width direction.

The folded portions 22B and 24B include front and back extending portions 22F and 24F that are bent forward from the inner ends in the seat width direction of the widthwise extending portions 22E and 24E and extending in the front and back direction, and It has width direction extending parts 22G, 24G which are bent outward in the seat width direction from the front ends of the extension parts 22F, 24F and extend in the seat width direction. Note that the portions of the widthwise extending portions 22G and 24G that are bent and extend forward from the outer ends in the sheet width direction are defined as the front side of the outer spring members 22 and 24.

The inner spring member 26 has a bent portion 26A that is bent into a substantially “S” shape when viewed from the bottom (or may be viewed from above) at approximately the same position as the wing portions 22A and 24A in the front-rear direction. More specifically, the bent portion 26A is a widthwise extending portion 26B that is bent from the rear side of the inner spring member 26 to one seat widthwise outer side (left side in the drawing) and extends in the seat widthwise direction. and a front-rear extending portion 26C that is bent forward from one seat width direction outer end of the width direction extending portion 26B and extends in the front-rear direction.

The bent portion 26A extends from the front end of the longitudinally extending portion 26C to the inner side in the seat width direction, furthermore, beyond the central portion (center portion) in the seat width direction to the outer side in the seat width direction (the one shown is a widthwise extending portion 26D that is bent toward the right side) and extends in the seat width direction, and a widthwise extending portion 26D that is bent forward from the other outer end of the seat widthwise direction of the widthwise extending portion 26D and extends in the front-rear direction. It has a front-rear extending portion 26E that extends in the front-rear direction, and a width-direction extending portion 26F that extends in the seat width direction by being bent inward in the seat width direction from the front end of the front-rear extending portion 26E. Note that the portion of the widthwise extending portion 26F that is bent and extends forward from the inner end in the seat width direction is the front side of the inner spring member 26.

Also, positions that are approximately the same in the front and back direction as the wing parts 22A, 24A, folded parts 22B, 24B, and bent part 26A of the cushion spring 20 (positions that face the buttocks of the occupant P in the vertical direction and support the buttocks) ) is fitted with a support member 30 made of resin. Specifically, the support member 30 is a member that supports the posture maintenance of the occupant P, and as shown in FIGS. 2 to 4, the support member 30 is a main body portion in the shape of a substantially rectangular flat plate whose longitudinal direction is the seat width direction. 32, and a substantially rectangular flat plate-shaped inclined portion 34 that is integrally inclined from the outer end portions (left and right end portions) of the main body portion 32 toward the outer upper side in the seat width direction.

The first fitting portion 34A integrally formed on the lower surface of at least the center portion of each inclined portion 34 in the front-back direction is a portion extending in the front-back direction of the wing portions 22A, 24A; A pair of left and right second fitting portions 32A integrally formed on the lower surface of the front end portion of the main body portion 32 are fitted in the respective portions of the folded portions 22B and 24D in the width direction, which are portions extending in the seat width direction of the folded portions 22B and 24B. The extension parts 22G and 24G are respectively fitted. Furthermore, a set of two third fitting parts 32B integrally formed on the lower surface of the central part and the rear end part of the main body part 32 in the front-rear direction are the parts extending in the front-rear direction of the bent part 26A. It is fitted into the extending portion 26C and the longitudinally extending portion 26E.

The first fitting part 34A, the second fitting part 32A, and the third fitting part 32B are each composed of a pair of claw parts having a predetermined width and a predetermined length, and the pair of claw parts are spaced apart from each other. It can be elastically deformed in the direction of Therefore, the first fitting part 34A, the second fitting part 32A, and the third fitting part 32B are arranged in order from the upper side: the front-back extending parts 22D and 24D, the width-direction extending parts 22G and 24G, and the front-back extending parts 22D and 24D, respectively. It is fitted into the existing portion 26C and the longitudinally extending portion 26E. This allows the support member 30 to be attached to the cushion spring 20.

Further, as shown in FIGS. 3 and 4, reinforcing ribs 36 are integrally formed on the lower surface of the support member 30 at the boundary between the main body portion 32 and the inclined portion 34. The rib 36 is formed into a substantially right triangular prism shape when viewed from the front and back direction as the height direction, and even if a load is applied to the sloped portion 34 from above, the sloped portion 34 It is reinforced from both the left and right ends to prevent it from cracking. As shown in FIG. 3, the rib 36 is formed with a predetermined length at the center of the support member 30 in the front-rear direction, but it is not formed over the entire length of the support member 30 in the front-rear direction. Good too.

Next, the operation of the vehicle seat 10 according to the present embodiment configured as described above will be explained.

As described above, the metal cushion spring 20 installed between the front panel 14 and the rear pipe 16 of the seat cushion 12 is bent into a substantially "U" shape in plan view or bottom view, and the seat width is It has wing portions 22A, 24A that are inclined toward the outside and upward in the direction, and folded portions 22B, 24B that are continuously bent in a substantially “L” shape from the inner end portions of the wing portions 22A, 24A in the sheet width direction. It is configured to include a pair of left and right outer spring members 22 and 24 that are symmetrical.

and a substantially rectangular flat plate-shaped main body portion 32; a substantially rectangular flat plate-shaped inclined portion 34 that integrally slopes from the seat width direction outer end portions (left and right end portions) of the main body portion 32 toward the outer upper side in the seat width direction; A supporting member 30 made of resin has a first fitting portion 34A formed on at least the inclined portion 34, which fits into the longitudinally extending portions 22D and 24D of the wing portions 22A and 24A. The cushion spring 20 is attached to the cushion spring 20 by fitting the second fitting portion 32A into the widthwise extending portions 22G and 24G of the folded portions 22B and 24B.

That is, the support member 30 made of resin and separate from the cushion spring 20 made of metal is attached to the cushion spring 20. Therefore, the bending rigidity and torsional rigidity of at least a part of the cushion spring 20 to which the support member 30 is attached can be improved, and the part of the cushion spring 20 and the support member 30 (via the seat pad) It can support P's posture maintenance.

In the remaining portions of the cushion spring 20 excluding the portion where the support member 30 is attached, the spring material is embedded in the resin material and integrated so that a sufficient amount of deflection deformation can be ensured. It is possible to suppress the bending deformation (stroke feeling) of the cushion spring 20 from being inhibited more than necessary.

Therefore, even if the seat pad is made thinner to reduce weight and the seat cushion 12 is made thinner, it is possible to prevent the cushioning properties of the seat cushion 12 from being impaired (the cushioning properties cannot be improved). ), it is possible to suppress the loss of sitting comfort (it is possible to improve sitting comfort). In other words, even if the seat cushion 12 is thin, it is possible to suppress a decrease in the feeling of posture maintenance in the occupant P, and it is possible to provide a comfortable riding environment.

Further, since the first fitting portion 34A is fitted to the front-rear direction extending portions 22D, 24D, and the second fitting portion 32A is fitted to the width direction extending portions 22G, 24G, the occupant P can sit on the seat cushion. Even if the wing parts 22A and 24A are bent and deformed by sitting on the seat 12, the support member 30 can be prevented from slipping relative to the cushion spring 20 (displacement in the front-rear direction and the seat width direction), and the support member 30 can The bending rigidity and torsional rigidity of the cushion spring 20 can be improved more effectively. Therefore, the supporting force (holding ability) for the occupant P can be improved.

Moreover, since the inclined portions 34 which are inclined outwardly and upwardly in the seat width direction are formed at both left and right end portions of the main body portion 32, the wing portions 22A and 24A which are inclined outwardly and upwardly in the seat width direction are formed. To suppress or prevent the occurrence of a problem in which the support member 30 comes off from the cushion spring 20 while the occupant P is sitting on the seat cushion 12. I can do it.

In addition, since the wing parts 22A, 24A and the inclined part 34 are both inclined outward and upward in the seat width direction, for example, the wing parts 22A and 24A are inclined outward and upward in the seat width direction. When a load is applied from the occupant P (from above), the load can be more effectively received by the wing sections 22A, 24A and the inclined section 34, compared to a case where there is no such structure. In other words, it is possible to prevent the inclined portion 34 from cracking from the main body portion 32, and to suppress a decrease in the holdability of the inclined portion 34. Therefore, the supporting force (holding ability) for the occupant P can be improved.

Further, this cushion spring 20 has a bent portion bent in a substantially “S” shape in a bottom view (or plan view) at a position that is substantially the same as the wing portions 22A, 24A and the folded portions 22B, 24B in the front-rear direction. It also includes an inner spring member 26 having a diameter of 26A. A set of two third fitting portions 32B formed on the main body portion 32 are fitted into the front-back extending portion 26C and the front-back extending portion 26E of the bent portion 26A.

Therefore, even if the wing parts 22A and 24A are bent and deformed due to the occupant P sitting on the seat cushion 12, the slippage of the support member 30 with respect to the cushion spring 20 (displacement in the longitudinal direction and the seat width direction) is more effectively suppressed. In addition, the support member 30 can more effectively improve the bending rigidity and torsional rigidity of the cushion spring 20. Therefore, the supporting force (holding ability) for the occupant P can be improved more effectively.

Furthermore, a reinforcing rib 36 is integrally formed at the boundary between the main body portion 32 and the inclined portion 34 of the support member 30. Therefore, the rigidity of the support member 30, particularly the inclined portion 34, can be increased, so that the supporting force (holding ability) for the occupant P can be effectively improved.

Moreover, since the support member 30 is attached to the cushion spring 20 by fitting the first fitting part 34A, the second fitting part 32A, and the third fitting part 32B, it is easy to separate from the cushion spring 20. Therefore, the recyclability of the cushion spring 20 and the support member 30 can be improved compared to a case where the spring material is embedded and integrated with the resin material.

The vehicle seat 10 according to the present embodiment has been described above based on the drawings, but the vehicle seat 10 according to the present embodiment is not limited to what is shown in the drawings and does not depart from the gist of the present invention. The design can be changed as appropriate within the range. For example, the inclined portion 34 may be formed only at either the left or right end of the main body portion 32.

Further, the inclined portion 34 may also be formed at the rear end portion of the main body portion 32, for example. Further, the bent portion 26A is not limited to being formed in a substantially "S" shape when viewed from the bottom as shown in the figure, but may be formed into a substantially "S" shape when viewed from above. In that case, the formation position of the pair of third fitting parts 32B is also changed according to the shape of the bent part 26A.

10 Vehicle seat 12 Seat cushion 20 Cushion spring 22 Outer spring material 22A Wing part 22B Folded part 24 Outer spring material 24A Wing part 24B Folded part 26 Inner spring material 26A Bend part 30 Support member 32 Main body part 32A Second fitting part 32B Third fitting part 34 Inclined part 34A First fitting part 36 Rib

Claims (3)

A wing portion that is bent into a substantially “U” shape when viewed from above or from the bottom and is inclined toward the outside and upward in the seat width direction, and a substantially “L” shape that continues from the inner end of the wing portion in the seat width direction. a metal cushion spring constructed of a pair of left and right outer spring members having a folded part bent in the shape of a shape, and installed between the front and rear parts of the seat cushion;
It has a flat main body portion, and an inclined portion that is inclined outwardly upward in the seat width direction from an outer end of the main body portion in the seat width direction, and at least a first fitting portion formed in the inclined portion is provided. The second fitting portion formed in the main body portion is fitted into the portion of the wing portion extending in the seat longitudinal direction, and the second fitting portion formed in the main body portion is fitted into a portion of the folded portion extending in the seat width direction, a resin support member attached to the cushion spring;
A vehicle seat equipped with The cushion spring is configured to also include an inner spring member having a bent portion bent in a substantially “S” shape when viewed from above or from the bottom at a position that is substantially the same as the wing portion in the front-rear direction of the seat;
The vehicle seat according to claim 1, wherein the third fitting portion formed on the main body portion is fitted into a portion of the bent portion extending in the seat front-rear direction. The vehicle seat according to claim 1 or 2, wherein a reinforcing rib is formed at a boundary between the main body portion and the inclined portion.