JP2018016095A - Vehicle seat - Google Patents

Abstract

The present invention provides a vehicle seat capable of further improving seating comfort.
In a vehicle seat 1 configured by attaching a net 9 to a seat frame, the seat frame includes side frames 6 disposed on both sides in the width direction of the vehicle and having a triangular cross section. The frame 6 has a first surface 8 that is inclined inward in the vehicle width direction and is inclined with respect to a seated passenger P, and a width direction in a net 9 that is wound around the side frame 6 so as to cover the first surface 8. The two end portions 9A are fixed to the second surface 10.
[Selection] Figure 2

Description

  The present invention relates to a seat in a vehicle.

  An example of this type of sheet is described in Patent Document 1. The sheet is called a so-called net sheet, and is configured by attaching a net, which is a woven or knitted fabric, to a seat frame. The cross-sectional shape of the seat frame is a gate shape or C-shape that opens to the side of the occupant seated on the seat. A net is attached to an end of the seat frame on the passenger side via a locking member. In addition, the cushion pad which functions as a side support part is attached to the position corresponding to the seat frame in the net.

  Japanese Patent Application Laid-Open No. 2004-228561 describes a seat configured by stretching a net on a seat back frame. The net described in Patent Document 2 has a thread portion radially extending from the connecting portion at a position close to the center portion in the vertical direction of the seat back and the central portion in the left-right direction as a connecting portion. . The yarn portion is configured to have a high rigidity in the length direction and a low rigidity in the bending direction, and is directly or indirectly connected to the connecting portion or the seat back frame.

  Patent Document 3 describes a seat configured such that a backrest portion of a seat back and a side frame of the seat back move in conjunction with each other at the time of a rear collision. The seat is configured by covering a seat frame with a cushion material, and the seat frame is formed between a side frame and a gate-shaped upper frame, side frames connected to left and right ends of the upper frame. With attached lumbar support. The cross-sectional shape of the side frame is substantially triangular, and both end portions of the lumbar support are fitted to the surface of the three surfaces of the side frame that faces the center side in the left-right direction of the seat. The side frame and the lumbar support are constituted by leaf springs. When a rear impact occurs and an occupant seated in the seat back is pressed against the seat, the side frame and the lumbar support are deformed in conjunction with each other, thereby reducing the impact force on the occupant and It can be protected.

JP 2013-52757 A JP, 2015-160457, A JP 2012-188791 A

  The so-called net sheet is configured to produce fit and cushioning by bending the net. In the configuration described in Patent Document 1, since the cross-sectional shape of the seat frame is a gate shape or a C-shape, when the net is bent due to the occupant sitting on the net seat, the seat on the center side in the left-right direction of the seat There is a possibility that a net contacts the corner of the frame, and an occupant contacts the corner via the net. In the configuration described in Patent Document 1, since a so-called edge comes into contact with the net or the occupant, there is still room for improvement in order to improve the durability of the net and the comfort received by the occupant.

  In the seat described in Patent Document 2, since the yarn portion is easily deformed in the rotation direction around the connecting portion, an occupant leaning on the net is steered or receives a lateral acceleration. In addition, it is easy to twist the upper body around the vicinity of the portion facing the connecting portion. However, the seat described in Patent Document 2 has a structure that considers contact between the occupant and the seat back frame via the bent net when the occupant leans against the seat back and the net is bent. Not. Therefore, like Patent Document 1, there is still room for improvement.

  The seat described in Patent Document 3 is configured by covering a seat frame with a cushion material, and does not describe any problems when using a net instead of the cushion material. In the configuration described in Patent Document 3, there is no room for using a net instead of the cushion material.

  The present invention has been made paying attention to the above technical problem, and an object of the present invention is to provide a vehicle seat that can further improve the comfort of seating.

  In order to achieve the above object, the present invention provides a vehicle seat configured by attaching a net to a seat frame, wherein the seat frame is disposed on both sides in the width direction of the vehicle and has a triangular cross section. A side frame having a shape, the side frame being wound around the side frame in a state of covering the first surface and a first surface inclined inward with respect to a seated occupant facing in the width direction of the vehicle. And a second surface to which both end portions in the width direction of the net are fixed.

  According to the present invention, the side frames constituting a part of the seat frame are respectively disposed on both sides in the width direction of the vehicle. Each side frame has a triangular cross section, and the first surface of the three sides of the side frame faces inward in the width direction of the vehicle, and is for the occupant seated on the seat. Is inclined. That is, each 1st surface is arrange | positioned at the angle opened toward the passenger | crew who seats, and is V-groove shape. A net is wound around the side frame so as to cover each first surface, and both ends of the net in the vehicle width direction are fixed to the second surface of the side frame. That is, it is difficult to see the fixed portion of the net with respect to the side frame from the seated passenger. Therefore, in the vehicle seat having the above-described configuration, the net and the first surface approach each other when the net is bent due to the occupant sitting, and the net and the first surface come into contact when the net is further bent. Since the first surface is inclined with respect to the seated occupant facing the inside of the seat, the occupant and the first surface come into contact with each other through the net when the net is greatly bent. That is, it can prevent or suppress that a passenger | crew and the corner | angular part of a side frame contact. Further, when the net is greatly bent, the occupant and the first surface come into contact with each other through the net, so that the contact area between the occupant and the first surface through the net is larger than that in contact with the so-called edge. The seating comfort can be improved. And since the both ends of the net | network in the width direction of a vehicle are fixed to a 2nd surface, ie, it fixes to the position which is hard to see from a passenger | crew, the appearance of the whole seat can be improved.

It is a figure which shows an example of the vehicle seat which concerns on embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 and is a cross-sectional view of the cushion frame according to the first embodiment of the present invention. It is sectional drawing of the cushion frame in 2nd Embodiment of this invention. It is sectional drawing of the cushion frame in 3rd Embodiment of this invention. It is sectional drawing of the cushion frame in 4th Embodiment of this invention. It is sectional drawing of the cushion frame in 5th Embodiment of this invention. It is sectional drawing of the cushion frame in 6th Embodiment of this invention.

  FIG. 1 is a view showing an example of a vehicle seat according to an embodiment of the present invention. In FIG. 1, the arrow FR direction indicates the front direction of the vehicle longitudinal direction, the arrow RR direction indicates the rear direction of the vehicle longitudinal direction, and the arrow UP direction indicates the upward direction of the vehicle vertical direction. The arrow DOWN direction indicates the lower direction of the vehicle in the vertical direction. The seat 1 shown here is a so-called net seat, and is a single seat that can be used as a driver seat or a passenger seat in a vehicle, for example. The seat 1 is supported from the back by leaning the upper body of the passenger P and the seat cushion portion 2 that supports the weight by placing the buttocks H and thighs T of the passenger P as in the case of the conventional vehicle seat. And a seat back portion 3. The seat 1 is placed on a rail 4 and configured to be able to adjust the position in the front-rear direction of a vehicle (not shown). Moreover, the reclining function (not shown) which can adjust the angle of the seat back part 3 can be provided. Further, a headrest portion 5 is attached to the upper center portion of the seat back portion 3.

  The seat cushion portion 2 described above is a cushion frame (hereinafter simply referred to as a frame) 6 disposed on both sides in the width direction of the vehicle, and a seat surface stretched between the frames 6. 1 net structure. The frame 6 extends in the front-rear direction of the vehicle and has a substantially triangular cross section as described later. In FIG. 1, the description of the first net structure is omitted to simplify the drawing. As an example, the first net structure may be configured by knitting or combining a plurality of filaments. Both ends of the first net structure in the width direction of the vehicle are fixed to the frame 6 as will be described later.

  The seat back portion 3 includes a seat back frame (hereinafter simply referred to as a back frame) 7 that stands up obliquely upward from a rear portion of the seat cushion portion 2 in the longitudinal direction of the vehicle, and the back frames 7. And a second net structure as a backrest surface sandwiched therebetween. The second net structure may be configured in the same manner as the first net structure described above, or the central part in the left-right direction is a connection part, and the linear structure radially extends from the connection part to the back frame 7 side. May be configured. In FIG. 1, the description of the second net structure is omitted to simplify the drawing.

  FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and is a cross-sectional view of the cushion frame in the first embodiment of the present invention. In FIG. 2, the arrow RH direction indicates the right direction in the vehicle width direction, the arrow LH direction indicates the left direction in the vehicle width direction, the arrow UP direction indicates the upward direction in the vehicle vertical direction, and the arrow The DOWN direction indicates the lower direction of the vertical direction of the vehicle. The frame 6 is a hollow member having rigidity and strength to support the weight of the passenger P, and in the example shown in FIG. 2, the cross section has a triangular shape. The first surface 8 of the three surfaces of the frame 6 faces inward in the width direction of the seat 1 and is predetermined with respect to the passenger P. The angle is inclined. That is, in the example shown in FIG. 2, the angle formed by the first surfaces 8 of each frame 6 is a wide angle that opens toward the passenger P, and the V-grooved portion is formed by the first surfaces 8. Is formed. The first net structure 9 is stretched over the opening end side of the V-groove portion. In FIG. 2, of the three surfaces of the frame 6, the surface facing the lower side in the vertical direction of the vehicle is the second surface 10, and the surface facing the outside of the seat 1 is the third surface 11. It has become.

  Further, the first corner portion 12 formed by the first surface 8 and the second surface 10 is an acute angle and protrudes inward in the width direction of the sheet 1. The second corner 13 formed by the first surface 8 and the third surface 11 is an acute angle and protrudes upward in the vertical direction of the vehicle. A third corner 14 formed by the first surface 8 and the third surface 11 is substantially perpendicular. The three corners 12, 13, and 14 are rounded or chamfered, and the edge of the frame 6 is rounded.

  A mounting structure of the first net structure 9 will be described. A first net structure 9 is arranged above each frame 6 in the vertical direction of the vehicle, and each end 9A of the first net structure 9 in the vehicle width direction is wound around each frame 6 and the seat 1 It is fixed at a position where it is difficult to see from the passenger P sitting on the seat. That is, each end portion 9 </ b> A is disposed so as to cover each first surface 8, and is folded back to the third surface 11 side at the second corner portion 13 to cover the third surface 11. Further, the second corner 10 is folded back to the second surface 10 side and fixed by the second surface 10. The means for fixing can be appropriately selected and can be fixed by a predetermined locking member. For example, it can be attached by fitting a fitting convex portion integrally formed on each end portion 9A to a fitting concave portion formed on the frame 6 or attached in advance. In addition to the first net structure 9, for example, a pin may be prepared as a fitting convex portion. In that case, the 1st net structure 9 is fixed to the flame | frame 6 by fitting the pin penetrated to each edge part 9A of the 1st net structure 9, and the recessed part for a fitting. In addition, in order to prevent or suppress the pin pierced to each end portion 9A of the first net structure 9 from being detached from each end portion 9A, it is preferable that a so-called retaining is provided on the pin. In addition, the fixed part of each end 9A on the second surface 10 is indicated by reference numeral 15 in FIG.

  The operation of the sheet 1 having the above-described configuration will be described. When the passenger P is not seated on the seat 1, the load that bends the first net structure 9 does not particularly act. Therefore, it is in a so-called relaxed state and the tension generated in the first net structure 9 is small. The first net structure 9 in an unbent state is indicated by a one-dot chain line in FIG. As described above, when the tension generated in the first net structure 9 is small, the first net structure 9 approaches or contacts the second surface 10, the third surface 11, and the second corner 13. The first net structure 9 is separated from the first surface 8.

  On the other hand, when the occupant P is seated on the seat 1, a load corresponding to the weight of the occupant P acts on the first net structure 9, and the first net structure 9 is bent. The bent first net structure 9 is indicated by a solid line in FIG. Moreover, the tension | tensile_strength mentioned above becomes large with the deformation | transformation of the 1st net structure 9, and the fitting property with respect to the passenger | crew's P buttocks H and the thigh T and cushioning property are acquired. Further, when the first net structure 9 is bent in this way, the first net structure 9 approaches the first surface 8 of the frame 6. When the first net structure 9 is further bent, the first net structure 9 and the first surface 8 come into contact with each other. As a result, the first surface 8 comes into surface contact with the thigh T of the passenger P via the first net structure 9. In the above-described configuration, even if the first net structure 9 is greatly bent and the frame 6 of the seat 1 comes into contact with the passenger P, the contact area can be increased, so that the so-called edge is prevented or suppressed. Can improve the comfort of sitting. Moreover, the load per unit area which acts on the 1st net structure 9 can be made small, and the durability can be improved. Furthermore, in the above-described configuration, the fixed portion 15 of the first net structure 9 with respect to each frame 6 is difficult to see from the passenger P, so that the overall appearance of the seat 1 can be improved. And in the sheet | seat 1 of the structure mentioned above, between 2nd corner | angular parts 13 functions as what is called a sheet | seat width in a vehicle width direction. Therefore, the sheet width that can be effectively used with respect to the entire width of the sheet can be increased.

  FIG. 3 is a sectional view of a cushion frame according to the second embodiment of the present invention. In FIG. 3, the arrow RH direction indicates the right direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vertical direction of the vehicle. In the example shown here, the cross-sectional shape of the frame 6 forms a trapezoid. As shown in FIG. 3, the upper surface and the lower surface of the frame 6 in the vertical direction of the vehicle are parallel to each other, and the width of the upper surface is shorter than the width of the lower surface in the vehicle width direction. That is, when the second surface 10 is the lower surface, the upper surface parallel to the second surface is the fourth surface 16. Similarly to the example shown in FIG. 2, the first surface 8 faces inward in the vehicle width direction and is inclined with respect to the passenger P by a predetermined angle. A V-groove portion is formed by the left and right first surfaces 8, and the first net structure 9 is stretched over the opening end side of the V-groove portion. The fourth corner portion 17 formed by the first surface 8 and the fourth surface 16 is an obtuse angle. The corners 12, 13, 14, and 17 are rounded or chamfered, and the edge of the frame 6 is rounded. Each end 9 </ b> A of the first net structure 9 is wound around the frame 6 so as to cover each first surface 8. That is, the first surface 8 and the fourth surface 16 are covered, and the second corner portion 13 is folded back toward the third surface 11 to cover the third surface 11. Further, the second corner 10 is folded back to the second surface 10 side and fixed by the second surface 10.

  FIG. 4 is a cross-sectional view of a cushion frame according to the third embodiment of the present invention. In FIG. 4, the arrow RH direction indicates the right direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vertical direction of the vehicle. In the example shown here, the cross-sectional shape of the frame 6 forms a parallelogram. As shown in FIG. 4, the first surface 8 faces inward in the vehicle width direction and is inclined at a predetermined angle with respect to the passenger P, as in the example shown in FIGS. 2 and 3. A V-groove portion is formed by the left and right first surfaces 8, and the first net structure 9 is stretched over the opening end side of the V-groove portion. The first surface 8 and the third surface 11 are parallel to each other, and the second surface and the fourth surface 16 are parallel to each other. The first corner portion 12 and the second corner portion 13 are both acute angles, and the third corner portion 14 and the fourth corner portion 17 are both obtuse angles. Further, the corner portions 12, 13, 14, and 17 are rounded or chamfered, respectively, and the edge of the frame 6 is rounded. Each end 9 </ b> A of the first net structure 9 is wound around the frame 6 so as to cover each first surface 8. That is, the first surface 8 and the fourth surface 16 are covered, and the second corner portion 13 is folded back toward the third surface 11 to cover the third surface 11. Further, the second corner 10 is folded back to the second surface 10 side and fixed by the second surface 10.

  3 and 4, when the first net structure 9 is largely bent due to the passenger P sitting on the seat 1, the first net structure 9 and the frame 6 are One surface 8 is in surface contact. Since it is possible to prevent or suppress the so-called edge from hitting the passenger P, the comfort of sitting can be improved. Further, since the fourth surface 16 is provided on the upper side of the frame 6 in the vertical direction of the vehicle, as described above, the first net structure 9 and the frame when the first net structure 9 is greatly bent. The contact area with 6 can be increased. As a result, the load per unit area acting on the first net structure 9 can be further reduced, so that the durability of the first net structure 9 can be further improved. Furthermore, since each edge part 9A of the 1st net structure 9 is fixed to the 2nd surface 10, the appearance of the sheet | seat 1 as a whole can be improved. In the seat 1 having the configuration shown in FIGS. 3 and 4, the space between the fourth corner portions 17 functions as a so-called seat width in the vehicle width direction. Therefore, the sheet width that can be effectively used with respect to the entire width of the sheet can be increased.

  FIG. 5 is a sectional view of a cushion frame according to the fourth embodiment of the present invention. In FIG. 5, the arrow RH direction indicates the right direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. The frame 6 shown in FIG. 5 has a substantially triangular cross section, and a thinned portion 18 penetrating in the thickness direction is formed on the second surface 10. The lightening portions 18 may be formed continuously over the length direction of the frame 6, or a plurality of lightening portions 18 may be formed at regular intervals. The configuration shown in FIG. 5 is substantially the same as the configuration shown in FIG. 2 described above. Therefore, the same parts as those shown in FIG.

  FIG. 6 is a sectional view of a cushion frame according to the fifth embodiment of the present invention. In FIG. 6, the arrow RH direction indicates the right direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. The frame 6 shown in FIG. 6 has a substantially trapezoidal cross section, and the second surface 10 has a thinned portion 18 penetrating in the thickness direction. The lightening portions 18 may be formed continuously over the length direction of the frame 6, or a plurality of lightening portions 18 may be formed at regular intervals. The configuration shown in FIG. 6 is substantially the same as the configuration shown in FIG. 3 described above, and the same parts as those shown in FIG.

  FIG. 7 is a cross-sectional view of a cushion frame according to the sixth embodiment of the present invention. In FIG. 7, the arrow RH direction indicates the right direction in the vehicle width direction, and the arrow UP direction indicates the upward direction in the vehicle vertical direction. The frame 6 shown in FIG. 7 has a substantially parallelogram in cross section, and a thinned portion 18 penetrating in the thickness direction is formed on the second surface 10. The lightening portions 18 may be formed continuously over the length direction of the frame 6, or a plurality of lightening portions 18 may be formed at regular intervals. The configuration shown in FIG. 7 is almost the same as the configuration shown in FIG. 4 described above, and the same parts as those shown in FIG.

  Even in the configuration shown in FIGS. 5 to 7, when the first net structure 9 is largely bent due to the passenger P sitting on the seat 1, the first net structure 9 and the frame 6 are One surface 8 is in surface contact. Since it is possible to prevent or suppress the so-called edge from hitting the passenger P, the comfort of sitting can be improved. Moreover, the load per unit area which acts on the 1st net structure 9 can be made small, and the durability can be improved. Furthermore, since the lightening portion 18 is provided, the material cost can be reduced accordingly. The thinned portion 18 is formed on the third surface 11 facing outward in the seat 1 and is covered with the first net structure 9, so that it is difficult for the passenger P to see and the overall appearance of the seat 1 can be improved. . In the seat 1 having the configuration shown in FIG. 5, the space between the third corners 13 functions as a so-called seat width in the vehicle width direction. In the seat 1 having the configuration shown in FIGS. 3 and 4, The space between the fourth corner portions 17 functions as a so-called sheet width. Therefore, the sheet width that can be effectively used with respect to the entire width of the sheet can be increased.

  In each of the above-described embodiments, the example in which the cross section of the frame 6 is a triangle, a trapezoid, or a parallelogram is given. However, in the embodiment of the present invention, the surface of the frame 6 facing the passenger P is the passenger. What is necessary is just to incline with respect to P. Moreover, the net structure in the embodiment of the present invention may be configured by knitting a linear body, or may be integrally formed by a method such as injection molding of a synthetic resin.

  DESCRIPTION OF SYMBOLS 1 ... Seat, 6 ... Cushion frame (side frame), 8 ... First surface, 9 ... First net structure (net), 9A ... Both ends of the first net structure (both ends of net), 10 ... First Two sides, P ... Passenger (occupant).

Claims (1)

In a vehicle seat configured by attaching a net to a seat frame,
The seat frame includes side frames that are respectively disposed on both sides in the width direction of the vehicle and have a triangular cross section.
The side frame has a first surface that faces inward in the width direction of the vehicle and is inclined with respect to a seated occupant, and the width direction of the net that is wound around the side frame so as to cover the first surface. And a second surface to which both ends of the vehicle are fixed.

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