Vehicle seat structure

Abstract

To maintain sliding property of a wire harness which is routed around a seat for a vehicle.SOLUTION: A vehicular seat structure includes a cushion material 40 and a seat back frame 31 which supports the cushion material 40. The seat back frame 31 includes a lower frame 35 which is disposed on a lower rear part in a vertical direction and extends in a seat width direction, routing parts 36f, 36g on which the wire harness 8 is routed, and support parts 36a, 36b which are provided on the lower frame 35 and support the routing parts 36f, 36g. The support parts 36a, 36b extend from the lower frame 35 in the vertical direction and the routing parts 36f, 36g are disposed so as to be dislocated in the vertical direction with respect to the lower frame 35.SELECTED DRAWING: Figure 7

Description

【Technical Field】 【0001】 The present invention relates to a vehicle seat structure. 【Background Art】 【0002】 For example, vehicle seats such as driver seats and passenger seats have a seat portion and a seat back. In such a vehicle seat, when electrical components are arranged on the seat back, wiring materials (wire harnesses) connected to the electrical components are routed around a seat frame that constitutes a seat skeleton. At this time, the wire harness may be inserted through a plurality of holes provided in the seat frame that constitutes the seat skeleton. Also, the wire harness may be inserted through a clip attached to the hole of the seat frame. 【0003】 For example, in the vehicle seat disclosed in Patent Document 1, a harness insertion hole is formed in a side plate of a seat back frame that constitutes a seat frame, and a wire harness is inserted through the harness insertion hole. Also, in this example, a clip locking hole is provided at the center of a lower frame of the seat back frame, and a clip is press-fitted into the clip locking hole. The wire harness is inserted through the press-fitted clip, and thus the wire harness is routed around the seat frame. 【0004】 On the other hand, a vehicle seat has a reclining mechanism capable of adjusting the position of the seat back with respect to the seat portion. Also, as described above, electrical components provided on the seat back usually move together with the seat back when the seat back tilts and moves by the reclining mechanism. 【Prior Art Documents】 【Patent Documents】 【0005】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2012 - 136102 【Summary of the Invention】 [Problems that the invention aims to solve] 【0006】 A cushioning material is attached to the seat frame of a vehicle seat. That is, in the above example, a seat back cushion is provided on the seat back frame. When a wire harness is routed by providing harness insertion holes and clip locking holes in the seat back frame, the wire harness has a portion that is routed between the seat back frame and the seat back cushion. 【0007】 When the seat back frame tilts, the wire harness routed around the seat back frame slides around the frame to follow the tilting movement. However, in a structure having harness insertion holes and clip locking holes as in the example above, the tension acting during sliding may cause the wire harness routed between the seat back frame and the seat back cushion to sink into the seat back cushion. Such sinking may reduce the sliding performance of the wire harness. 【0008】 By routing the wire harness within the internal space of the frame shape formed in the seat back frame, it may be possible to suppress the reduction in the sliding properties of the wire harness as described above. However, when the seat back supports the occupant's upper body, the occupant's weight may push the seat back cushion backward, causing the seat back cushion to come into contact with the wire harness within the frame shape. This contact is undesirable because it may cause the wire harness to sink into the seat back cushion. Therefore, the structure of the above example had room for improvement in ensuring the sliding properties of the wiring material routed around the seat frame. 【0009】 The present invention was made to solve the above problems, and its objective is to provide a vehicle seat structure that can maintain the sliding properties of the wiring material arranged around the vehicle seat. [Means for solving the problem] 【0010】 To achieve the above objective, the vehicle seat structure according to the present invention comprises a cushioning material and a seat frame that supports the cushioning material, wherein the seat frame is positioned at the lower rear of the vehicle seat in the vertical direction and extends in the seat width direction, has a cable routing section through which cable routing material is routed, and has a support section provided on the lower frame that supports the cable routing section. In this vehicle seat structure, the support section extends vertically from the lower frame, and the cable routing section is positioned offset vertically from the lower frame. The cushioning material has a lower back portion positioned on the rear side of the seat of the lower frame, and the lower back portion has a base portion that extends in the seat width direction and covers the rear surface of the lower frame from the rear side of the seat, and a projection portion that protrudes upward from the base portion. Yes, they are. [Effects of the Invention] 【0011】 According to the present invention, it is possible to maintain the sliding properties of the wiring material arranged around a vehicle seat. [Brief explanation of the drawing] 【0012】 [Figure 1] This is a perspective view of a seat showing one embodiment of a vehicle seat structure according to the present invention. [Figure 2] This is a perspective view showing the seat with the cushioning material removed (Figure 1). [Figure 3] Figure 1 is a rear view of the seat. [Figure 4] This is a rear view of Figure 2. [Figure 5] This is a rear view showing the seat back surface material removed from Figure 3. [Figure 6] Figure 5 is a perspective view showing the AA section. [Figure 7] This is a cross-sectional view taken along the line AA in Figure 5. [Figure 8] Figure 7 is a plan view showing the positional relationship between the first protrusion and the first support. [Figure 9] This is a rear view showing modified examples of the first and second support parts of Figure 4. [Modes for carrying out the invention] 【0013】 Hereinafter, an embodiment of a vehicle seat structure according to the present invention will be described with reference to the drawings (FIGS. 1 to 8). In the drawings, the direction of arrow Fr indicates the front in the front-rear direction of the vehicle seat 1. The "front part (front end) and rear part (rear end)" in the description of the embodiment correspond to the front part and rear part in the seat front-rear direction. Also, the front in the seat front-rear direction in the present embodiment corresponds to the front in the vehicle front-rear direction. Further, arrows R and L indicate the right side and left side when the occupant is seated on the seat 1. Also, arrow U indicates the upward direction. 【0014】 As shown in FIGS. 1 and 2, the vehicle seat 1 of the present embodiment has a structure of a front row seat such as a driver's seat or a passenger seat that can move in the seat front-rear direction on the seat rail 2. The seat rail 2 is attached to a floor panel (not shown) that constitutes the floor portion in the vehicle interior. 【0015】 The vehicle seat 1 of the present embodiment includes cushion materials 20 and 40 and a seat frame that supports the cushion materials. The seat frame is disposed at the lower rear portion in the vertical direction of the vehicle seat 1 and includes a lower frame 35 that extends in the seat width direction, wire harness (wiring material) 8 wiring portions 36f and 36g, and support portions 36a and 36b provided on the lower frame 35 to support the wiring portions 36f and 36g. In the vehicle seat structure, the support portions 36a and 36b extend in the vertical direction from the lower frame 35, and the wiring portions 36f and 36g are disposed offset in the vertical direction with respect to the lower frame 35. Hereinafter, each member constituting the vehicle seat 1 of the present embodiment will be described. 【0016】 First, the basic configuration of the vehicle seat 1 will be described. The vehicle seat 1 has a seat portion 10 and a seat back 30. Hereinafter, the seat portion 10 and the seat back 30 will be described. 【0017】 First, the seat part 10 will be described. As shown in FIGS. 1 and 2, the seat part 10 is the part where the occupant sits, and has a seat frame 11, a seat cushion (cushion material) 20, and a seat skin member 22. As shown in FIG. 2, the seat frame 11 is the part that constitutes the skeleton of the seat part 10. Also, the seat frame 11 is arranged on both side parts in the seat width direction (left and right), and has side frames 12 that extend in the seat front-rear direction, a front frame 13 that extends in the seat width direction and is joined to the front parts of the left and right side frames 12, and a rear frame 14 that extends in the seat width direction and is joined to the rear parts of the left and right side frames 12. 【0018】 A reclining mechanism 51 is provided at the rear part of the side frame 12 located on the right side. The reclining mechanism 51 in this example is a mechanism for enabling the seat back 30 to tilt so as to face the seat part 10. Also, the lower part of the side frame 12 is movably attached to the seat rail 2 via a traveling part (not shown). 【0019】 As shown in FIGS. 1 and 3, the seat cushion 20 has elastic characteristics and is installed on the upper part of the seat frame 11. An occupant sitting surface 20a is provided on the upper part of the seat cushion 20. The seat skin member 22 covers the sitting surface 20a, the front part, and the left and right side parts of the seat cushion 20 by covering the seat cushion 20 from above. 【0020】 As shown in FIGS. 1 and 2, the seat back 30 is the part that extends upward from the rear part of the seat part 10, and is configured to support particularly the upper body of the occupant sitting on the seat part 10. The seat back 30 has a seat back frame 31, a seat back cushion (cushion material) 40, and a seat back skin member 47. As shown in FIGS. 2 and 3, the seat back frame 31 has a frame body 32, a vertical frame 37, a connecting member 38, and an S-shaped spring 39. 【0021】 As shown in Figure 2, the frame body 32 is a component that constitutes the skeleton of the seat back frame 31, and is formed in a substantially rectangular shape by curving a pipe-shaped member. The frame body 32 has an upper frame 33 that extends in the seat width direction, left and right back side frames 34 that extend downward from each of the left and right ends of the upper frame 33 and are arranged parallel to each other, and a lower frame 35 that extends in the seat width direction so as to connect the lower ends of the left and right back side frames 34. The back side frames 34 are connected to each of the seat width directions ends of the lower frame 35. The upper frame 33 and the lower frame 35 are both horizontal and extend parallel to each other. The upper frame 33 and the lower frame 35 are made of solid or hollow pipes with a cylindrical cross-section, and a first support part 36a and a second support part 36b are welded to the upper rear of them. The left and right back side frames 34 are also made of pipes similar to the lower frame 35. 【0022】 Now, let's describe the lower frame 35. As described above, the lower frame 35 is provided with support parts 36a and 36b that support the wiring sections 36f and 36g through which the wire harness 8 is routed. The support parts 36a and 36b in this embodiment include a first support part 36a and a second support part 36b. The wiring sections 36f and 36g in this embodiment also include a first wiring section 36f and a second wiring section 36g. 【0023】 As shown in Figures 2, 6, and 7, the first support portion 36a is positioned at a predetermined location in the seat width direction of the lower frame 35, and more specifically, it is positioned in the middle of the seat width direction at the rear of the lower frame 35. Although a detailed illustration is omitted, the first support portion 36a in this example is a metal, substantially rectangular bracket extending in the seat width direction, and is joined to the lower frame 35 by, for example, arc welding. The first wiring portion 36f is a clip provided on the first support portion 36a, and the wire harness 8 is routed to the clip. In this example, the first wiring portion 36f is positioned offset upward and rearward relative to the lower frame 35. 【0024】 The first cable routing section 36f is not limited to a clip; any structure that allows the wire harness 8 to be hooked in a manner that allows it to slide in the sheet width direction is acceptable. For example, it may be a U-shaped plate-like member that can support the wire harness 8 from below. In this case, the first cable routing section 36f is preferably joined to the bracket constituting the first support section 36a by welding or the like. 【0025】 The second support portion 36b is located at the end of the lower frame 35 in the seat width direction, and more specifically, at the right end of the rear of the lower frame 35. In this example, the second support portion 36b is a metal bracket extending in the seat width direction and is joined to the right end of the lower frame 35 by, for example, arc welding. In this embodiment, the second support portion 36b is located at the corner formed by the lower frame 35 and the right back side frame 34. 【0026】 The second wiring section 36g is a clip provided on the second support section 36b, similar to the first wiring section 36f. In this example, the second wiring section 36f is positioned offset upward and rearward relative to the lower frame 35, similar to the first wiring section 36f. Note that the second wiring section 36g is not limited to a clip. The second wiring section 36g can be any structure that allows the wire harness 8 to be hooked in a manner that allows it to slide in the seat width direction, similar to the first wiring section 36f. 【0027】 Furthermore, the second support portion 36b is provided with a guide portion 36c for adjusting the routing direction of the wire harness 8. The guide portion 36c has a portion that protrudes rearward from the rear surface of the second support portion 36b and extends in the sheet width direction, and a portion that extends upward at its right end. The guide portion 36c in this embodiment is configured to change the routing direction of the wire harness 8 from a direction along the back side frame 34 (vertical direction) to a direction along the lower frame 35 (sheet width direction). For example, the vertically extending portion and the sheet width direction portion of the guide portion 36c form an L-shaped wall, and the wire harness 8 is routed along the L-shaped wall to change the routing direction. The guide portion 36c is located above the second space S2, which will be described later. 【0028】 Next, we will describe the other components that make up the seat back frame 31. As shown in Figure 5, the S-shaped spring 39 is arranged along the seat width direction so as to connect the left and right back side frames 34 of the frame body 32. In this example, two S-shaped springs are arranged with a gap between them in the vertical direction. 【0029】 As shown in Figure 2, the vertical frame 37 is a member that extends upward from the rear of the right-side frame 12 of the seat 10 and is attached to the right-side back frame 34 of the frame body 32. The upper part (upper end) of the vertical frame 37 is positioned between the vertical center and the upper end of the back frame 34. The lower part of the vertical frame 37 is connected to the rear of the right-side frame 12 of the seat 10 via the reclining mechanism 51. In other words, the vertical frame 37 is rotatable about the pivot axis of the reclining mechanism 51. 【0030】 Furthermore, as shown in Figure 2, an airbag device (electrical component) 53 is attached to the vertical frame 37. That is, the airbag device 53 rotates integrally with the vertical frame 37. The airbag device 53 extends along the longitudinal direction of the vertical frame 37, and a wire harness (wiring material) 8 is connected to the airbag device 53. In this embodiment, the wire harness 8 supplies power to the airbag device 53 from a battery device (not shown) mounted on the vehicle. The airbag device 53 in this example is a side airbag that protects occupants in the event of a side collision, and is located on the back side frame 34 on the outer side in the vehicle width direction within the vehicle interior. 【0031】 The connecting member 38 is rotatably attached to the rear of the left side frame 12 of the seat 10 and is attached to the left back side frame 34 of the frame body 32. In this embodiment, the frame body 32 is tiltably attached to the rear of the seat frame 11 via the vertical frame 37 and the connecting member 38. The reclining mechanism 51 in this embodiment is provided only on the right side of the seat 10 (only one side in the vehicle width direction). Therefore, the pivot axis for tilting the seat back 30 in this example is not a pipe-shaped member that connects the left and right side frames 12 that constitute the seat frame 11, but is provided on the rear of each of the left and right side frames 12. In other words, in this embodiment, there is no pivot axis connecting both sides in the seat width direction, and therefore the first support part 36a and the second support part 36b are provided on the lower frame 35. 【0032】 Next, the seat back cushion 40 will be described. As shown in Figure 5, the seat back cushion 40 has an upper cushion 41 and a back pad (lower back portion) 45. The upper cushion 41 has a main body portion 42, a side back portion 43 and a recess 44. The main body portion 42 has elastic properties and is the part that covers the frame body 32 of the seat back frame 31 from above, and has a support surface 42a that supports the occupant's back. The side back portion 43 is located on the outer side of the main body portion 42 in the seat width direction and extends in the vertical direction. In this example, the side back portion 43 is located on the rear side of the back side frame 34. 【0033】 The recess 44 is located on the rear side of the main body 42, between the left and right side back portions 43, and is recessed in front of the seat. The upper end of the recess 44 is located below the vertical midpoint of the main body 42. Inside the recess 44, two S-shaped springs 39 are arranged to traverse the recess 44. The lower end of the recess 44 is open downwards. The upper cushion 41 is covered by the seat back surface material 47. 【0034】 As shown in Figures 4 and 5, the back pad 45 is located below the recess 44 and extends in the seat width direction. The back pad 45 is positioned to cover the lower frame 35 of the frame body 32 of the seat back frame 31 from the rear. In this embodiment, the wire harness 8 is routed in the area above the back pad 45. 【0035】 As described above, the back pad 45 is positioned on the rear side of the seat of the lower frame 35. The back pad 45 in this embodiment has a base portion 45a and protruding portions 46a and 46b. The base portion 45a constitutes the main body of the back pad 45, extends in the seat width direction, and covers the rear surface of the lower frame 35 from the rear side of the seat. The base portion 45a is also positioned below the wiring section (in this example, the first wiring section 36f and the second wiring section 36g) through which the wire harness 8 is routed. 【0036】 In this embodiment, the protrusions 46a and 46b include a first protrusion 46a that covers the first support portion 36a from the rear, and a second protrusion 46b that covers the second support portion 36b from the rear. As shown in Figures 5 and 6, the first protrusion 46a is positioned in the middle of the sheet width direction at the top of the base portion 45a, protruding upward from the middle portion and extending in the sheet width direction. As shown in Figures 6 to 8, both sides of the first protrusion 46a in the sheet width direction are inclined to approach each other as they move towards the center of the first protrusion 46a in the sheet width direction. In this example, the first protrusion 46a has a substantially trapezoidal shape. 【0037】 In this embodiment, the first projection 46a extends upward from a position rearward from the front end of the upper surface of the base portion 45a. This configuration allows for the formation of a third space S3 between the first projection 46a and the first support portion 36a, thereby avoiding interference between the wire harness 8 and the first projection 46a. Furthermore, by providing a recess 46c (Figure 8) in the base portion 45a that is recessed downward from a position in front of the first projection 46a, the third space S3 can be extended downward, making it easier to route the wire harness 8 to the first routing portion 36f of the first support portion 36a. Moreover, the recess 46c is formed so that its dimension in the vehicle width direction becomes shorter as it goes downward, and the thickness of the base portion 45a becomes thicker towards the front, with the recess being shallower in the front-rear direction. This makes it less likely for the first projection 46a to bend forward when lightly pushed from the rear. Furthermore, the formation of the recessed portion 46c can be avoided, which would reduce the cushioning (shock absorption) of the base portion 45. 【0038】 The second projection 46b is positioned at the end (right end) in the sheet width direction on the upper part of the base portion 45a, protruding upward from the right end and extending in the sheet width direction. In this embodiment, the amount of protrusion of the second projection 46b from the base portion 45a is set to be smaller than the amount of protrusion of the first projection 46a from the base portion 45a. 【0039】 Furthermore, in this embodiment, as shown in Figure 7, a first space S1 is formed on the upper side of the back pad 45 between the first cable routing portion 36f and the second cable routing portion 36g, and penetrates in the front-rear direction of the seat when viewed from the rear of the seat. In this example, the first space S1 is located between the upper end of the base portion 45a of the back pad 45 and the lower end of the recess 44 of the upper cushion 41. 【0040】 As shown in Figure 1, the seat back surface member 47 covers the main body portion 42 of the seat back cushion 40 from above. The seat back surface member 47 covers the main body portion 42 including the support surface 42a, the side back portion 43, and the recess 44, and further covers the rear surface of the back pad 45 from the rear side of the seat. 【0041】 Here, the routing of the wire harness 8 in this embodiment will be described. The wire harness 8 extends to connect, for example, the wire connection part 3 (Figure 5) provided on the left seat rail 2 to the airbag device 53. Although not shown in the illustration, the wire harness 8 also extends to connect the battery device to the wire connection part 3 via the wire connection part 3, etc. The wire connection part 3 is an intermediate contact of the wire harness 8, and electrically and mechanically connects the wire harness 8 between the airbag device 53 and the wire connection part 3, and the wire harness 8 between the wire connection part 3 and the battery device. 【0042】 The routing of the wire harness 8 connecting the wire connection part 3 and the airbag device 53 will now be described. As shown in Figure 5, the wire harness 8 extends from the wire connection part 3 towards the rear of the seat below the seat cushion 20. Here, the middle portion of the wire harness 8 in the front-rear direction of the seat is supported by a spring provided on the seat frame 11 with some slack. The wire harness 8 extends from the portion supported by the spring in a slack state to the left side of the lower side of the seat back frame 31. 【0043】 Furthermore, the wire harness 8 routed on the lower side of the seat back frame 31 is slack, curves upward, and extends to the top of the back pad 45. At that top, it curves to the right and extends along the seat width direction to the right edge of the top of the back pad 45. Here, the wire harness 8 is slidably routed to a first routing section 36f located on the top of the back pad 45, and further slidably routed to a second routing section 36g at the right end of the back pad 45 (Figure 7). In addition, the wire harness 8 is slidably supported by the routing sections 36f and 36g in the routing direction of the wire harness 8 so that it can deform or move when the seat 1 is moved or the position of the seat back 30 is adjusted. Here, when sliding, a part of the wire harness 8 deforms as it slides. 【0044】 Furthermore, the wire harness 8 is guided in an upward curve at the guide portion 36c of the second support portion 36b located at the right end of the upper part of the back pad 45, extends along the vertical frame 37, and is connected to, for example, the lower part of the airbag device 53. Although not shown in the illustrations, the portion of the wire harness 8 that is routed along the seat frame 11 and the seat back frame 31 is slidably attached to the seat back frame 31 via multiple fixing members, such as clips. 【0045】 According to this embodiment, as described above, the first support portion 36a extends upward from the lower frame 35, which constitutes the lower frame of the seat back frame 31, where the load of the occupant is less likely to act. Therefore, it is possible to suppress contact between the wire harness 8 and the seat back cushion 40, or sinking of the wire harness 8 into the seat back cushion 40, around the first cable routing portion 36f. Moreover, as shown in Figure 7, in a top view, the first support portion 36a extends upward from the rear side of the lower frame 35, and the wire harness 8 is routed on the rear side of the first support portion 36a. Therefore, it is possible to create a gap between the wire harness 8 and the seat back cushion 40 around the first cable routing portion 36f, and contact between the wire harness 8 and the seat back cushion 40 around the first cable routing portion 36f can be further suppressed. Furthermore, since the first routing section 36f is positioned offset upward or downward relative to the lower frame 35, contact between the wire harness 8 and the lower frame 35 in the seat-front-rear direction can be suppressed. This allows the wire harness 8, which is routed around the seat back frame 31, to maintain its sliding properties at the first routing section 36f. It is also possible to route the wire harness 8 on the front side of the first support section 36a, provided that it extends upward or downward from the rear or an intermediate position in the front-rear direction of the first support section 36a. 【0046】 By providing the base portion 45a and the first projection portion 46a on the back pad (lower back portion) 45 of the seat back cushion 40 as described above, that is, by positioning the first projection portion 46a behind the first support portion 36a, when some object comes into contact with the rear of the first support portion 36a, even if the wire harness 8 is caught between the object and the first support portion 36a, or between the object and the first cable routing portion 36f, the impact energy transmitted from the object can be absorbed by the elastic deformation of the first projection portion 46a. In other words, since the impact energy can be absorbed as elastic energy, it is possible to protect the wire harness 8 and the first cable routing portion 36f. 【0047】 Furthermore, it becomes possible to create a structure that makes it easier to route the wire harness 8 above the base portion 45a, thereby reducing the contact area between the wire harness 8 and the back pad 45. As a result, the sliding properties of the wire harness 8 can be improved. 【0048】 Furthermore, in this embodiment, by providing the first support portion 36a in the middle of the seat width direction of the lower frame 35 (approximately the center in this example), the amount of upward protrusion of the first support portion 36a is reduced, making it easier to hold the wire harness 8 at a position higher than the base portion 45a. 【0049】 For example, when a single support is provided on the lower frame 35, compared to when the support is located at the end in the seat width direction, locating the support in the center in the seat width direction makes it possible to hold the wire harness 8 at a position higher than the upper end of the base portion 45a while lowering the height of the cable routing portions 36f, 36g. As a result, the sliding properties of the wire harness 8 can be maintained. 【0050】 Furthermore, in this embodiment, in addition to the first wiring section 36f, a second wiring section 36g is provided. Therefore, since the wire harness 8 is held by the two wiring sections 36f and 36g, the wire harness 8 can be easily positioned above the upper end of the base section 45a. As a result, the contact area between the wire harness 8 and the base section 45a can be reduced, making it easier to route the wire harness 8 by sliding it. 【0051】 Furthermore, by providing the first space S1 so as to penetrate the sheet in the front-rear direction between the first wiring section 36f and the second wiring section 36g, the wire harness 8 located between the first wiring section 36f and the second wiring section 36g can be more easily curved in the front-rear direction of the sheet. This makes it possible to more reliably maintain the sliding properties of the wire harness 8. 【0052】 Furthermore, in this embodiment, as shown in Figure 5, a second space S2 is formed in the vertical direction between the lower part of the side back portion 43 and the base portion 45a, penetrating in the front-rear direction of the seat. The wire harness 8 is routed so as to overlap the second space S2 when viewed in the front-rear direction of the seat. This configuration prevents the wire harness 8 from contacting the base portion 45a and the side back portion 43 from the front or rear in the area surrounding the second space S2, including the second space S2. As a result, the wire harness 8 becomes more flexible in the front-rear direction, improving its sliding properties. 【0053】 Furthermore, in this embodiment, the second space S2 is formed in the vertical direction between the lower end of the side back portion 43 and the upper end of the second protrusion 46b, which has the amount of protrusion set as described above. The second protrusion 46b can obtain the same effect as the first protrusion 46a. Moreover, since the lower part of the side back portion 43 is positioned above the second protrusion 46b, when some object comes into contact with the rear side of the second support portion 36b, the impact energy due to the contact can be absorbed as deformation energy due to the elastic deformation of the lower part of the side back portion 43 and the second protrusion 46b, so that the amount of protrusion of the second protrusion 46b can be reduced and the wire harness 8 can be made to slide more easily. 【0054】 Furthermore, the second space S2 corresponds to the space between the back pad 45 and the side back portion 43 in the vertical direction. By arranging the back pad 45 and the side back portion 43 in this way, the wire harness 8 becomes even less likely to come into contact with the base portion 45a and the side back portion in the front-to-back direction, and the wire harness 8 becomes more flexible in the front-to-back direction, improving its sliding properties. 【0055】 Furthermore, in this embodiment, the lower part of the side back portion 43 on the inner side in the seat width direction is provided with an inner inclined portion 43a that slopes downward and outward in the seat width direction. The second cable routing portion 36g is positioned further inward in the seat width direction than the inner inclined portion 43a. This prevents the wire harness 8 located around the second cable routing portion 36g from coming into contact with the side back portion 43. As a result, the wire harness 8 can be easily deformed in the vertical direction, making it easier to curve the wire harness 8 in the front-rear direction of the seat, and further enabling the wire harness 8 to slide more efficiently. 【0056】 Furthermore, as shown in Figure 5, the lower part of the side back portion 43 on the outer side in the seat width direction is provided with an outer inclined portion 43b that slopes downward and inward in the seat width direction. Since the second wiring portion 36g is positioned inward in the seat width direction from the outer inclined portion 43b, it is possible to prevent the wire harness 8 located around the second wiring portion 36g from coming into contact with the side back portion 43. 【0057】 Furthermore, by providing the guide portion 36c, it becomes possible to suppress excessive stress concentration in the area where the routing direction of the wire harness 8 is changed, thereby preventing the wire harness 8 from bending. 【0058】 The description of this embodiment is illustrative for explaining the present invention and does not limit the invention as described in the claims. Furthermore, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims. 【0059】 For example, in this embodiment, the first support portion 36a protrudes upward relative to the lower frame 35, but it is not limited to this. For example, as shown in Figure 9, the support portion 36a may protrude downward relative to the lower frame 35. In this case, a space is formed below the lower frame 35 of the base portion 45a, and the protruding portion is made to protrude downward from the lower frame 35 side of the base portion 45a, or, instead of providing a protruding portion, a recessed portion 46c may be provided in the base portion 45a such that the position corresponding to the wiring area of ​​the wire harness 8 (the area shown by the dashed line in Figure 9) is recessed to the rear. Furthermore, it is desirable that the first support portion 36a be positioned approximately in the center in the sheet width direction of the lower frame 35, but it is not limited to this. It may be positioned in the middle part in the sheet width direction of the lower frame 35. In the example of Figure 9, the first wiring portion 36f and the second wiring portion 36g are positioned offset downward relative to the lower frame 35. 【0060】 Furthermore, in this embodiment, the first cable routing section 36f is positioned offset to the rear of the seat relative to the lower frame 35, but this is not limited to this configuration. For example, the first cable routing section 36f may be positioned offset to the front of the lower frame 35. If a second support section 36b and a second cable routing section 36g are provided, they should protrude in the same direction as the first support section 36a and the first cable routing section 36f. 【0061】 Furthermore, although the lower frame 35 in this embodiment is located below the frame body 32 of the seat back frame 31, it is not limited to this. For example, it can also be provided on the rear frame 14 of the seat frame 11. Also, the lower frame 35 is a component that constitutes the skeleton of the seat back frame 31 and is not limited to a pipe-shaped member. For example, it may be a plate-shaped frame that extends in the vehicle width direction and connects the left and right vertical frames 37. 【0062】 In this embodiment, the electrical component to which the wire harness 8 is connected is an airbag device 53, but it is not limited to this. For example, it may be an electric motor that drives a position adjustment mechanism (reclining mechanism 51), etc. Furthermore, in this embodiment, the wire harness 8 is a collection of wires that supply power, but it is not limited to this. For example, it may be an air tube that supplies fluid (liquid or gas) to a blower or the like in a seat. 【0063】 Furthermore, as a variation of this embodiment, for example, the support portion (first support portion 36a, second support portion 36b) may be integrally formed with the lower frame 35. Also, although the first support portion 36a and the second support portion 36b are provided in this embodiment, only one of them may be provided. 【0064】 Furthermore, the guide portion 36c extends in the left-right direction and positions the wire harness 8 above it, but this is not limited to this configuration. The wire harness 8 may also be guided below the guide portion 36c. Alternatively, the guide portion 36c may extend in the up-down direction and be positioned inside or outside the sheet width direction of the wire harness 8, which is routed in the up-down direction. 【0065】 The back pad 45 may have a connecting portion (not shown) above the cable routing portions 36f and 36g that connects the first protrusion 46a and the second protrusion 46b. The back pad 45 may be connected to the lower end of the side back portion 43 and to the side portion of the back pad 45 in the seat width direction, provided that the second space S2 exists. Alternatively, the back pad 45 may have only the first protrusion 46a. In this case as well, it is preferable that the second space S2 is formed. 【0066】 Furthermore, the first protrusion 46a and the second space 46b can be made thinner, for example, by creating a space on the front side of the first protrusion 46a to suppress contact between the base portion 45a and the wire harness 8. In this case, the first space S1 does not need to be provided. Alternatively, the length of the second protrusion 46b in the rearward direction can be made shorter than that of the second space S2, creating a space on the front side to suppress contact between the base portion 45a and the wire harness 8. In addition, connecting portions connecting the side back portion 43 and the base portion 45a may be provided on both the left and right sides, or on one side. 【0067】 Furthermore, although the first support portion 36a is located at the rear of the lower frame 35 in this embodiment, it is not limited to this. For example, the first support portion 36a may be located at the front of the lower frame 35. This makes it possible to increase the distance between the first protrusion 46a and the first support portion 36a, thereby suppressing contact and interference between the wire harness 8 and the first protrusion 46a, and also to increase the thickness of the first protrusion 46a, thereby improving the shock absorption performance. [Explanation of symbols] 【0068】 1 seat (vehicle seat) 2 seat rails 8. Wire harness (wiring material) 10 Seat area 11. Seat frame 12 Side Frames 13 Front frame 14 Rear frame 20. Seat cushion (cushioning material) 20a Seat surface 22 Seat surface material 30 Seatback 31 Seat back frame 32 Frame Body 33 Upper Frame 34 Backside Frame 35 Lower Frame 36a 1st support part 36b Second support part 36c Information Department 36f 1st wiring section 36g 2nd wiring section 37 Vertical Frames 38 Connecting Members 39 S-shaped spring 40 Seat back cushion (cushioning material) 41 Upper cushion 42 Main body 42a Support surface 43 Side back section 43a Inner slope 43b Outside slope 44 recess 45 Backpad 45a Base section 46a 1st protrusion 46b Second protrusion 46c recessed area 47 Seat back surface material 51 Reclining mechanism 53. Airbag system (electrical component)

Claims

[Claim 1] It comprises a cushioning material and a seat frame that supports the cushioning material, The aforementioned seat frame is A lower frame is positioned at the lower rear of the vehicle seat in the vertical direction, and extends in the width direction of the seat. The cable routing section where the cable routing material is routed, A support portion provided on the lower frame and supporting the cable routing portion, In a vehicle seat structure having, The support portion extends vertically from the lower frame, The cable routing section is positioned offset vertically from the lower frame. The cushioning material has a lower back portion that is positioned on the rear side of the seat of the lower frame, The vehicle seat structure is characterized in that the lower back portion extends in the width direction of the seat and has a base portion that covers the rear surface of the lower frame from the rear side of the seat, and a protruding portion that protrudes upward from the base portion. [Claim 2] The vehicle seat structure according to claim 1, characterized in that the base portion is located below the cable routing portion. [Claim 3] The support portion is positioned in the middle of the lower frame in the seat width direction. The vehicle seat structure according to claim 1 or claim 2, characterized in that both sides of the protruding portion on the width side of the seat are inclined to move closer to each other as they extend upward. [Claim 4] The support portion includes a first support portion positioned at a predetermined location in the seat width direction of the lower frame, and a second support portion positioned at the end of the lower frame in the seat width direction. The cable routing section includes a first cable routing section provided on the first support section and a second cable routing section provided on the second support section. A vehicle seat structure according to any one of claims 1 to 3, characterized in that a first space is formed between the first cable routing portion and the second cable routing portion, extending in the front-rear direction of the seat when viewed from the rear of the seat. [Claim 5] The aforementioned seat frame includes a seat back frame that constitutes the seat back of a vehicle seat. The seat back frame comprises the lower frame and side frames connected to each of the two sides of the lower frame in the seat width direction. The cushioning material has a side back portion that is positioned on the rear side of the side frame, In the vertical direction, a second space is formed between the lower part of the side back portion and the base portion, which penetrates in the front-to-back direction of the seat. The vehicle seat structure according to claim 4, characterized in that the cable routing material is routed so as to overlap the second space when viewed in the front-rear direction of the seat. [Claim 6] The projection includes a first projection that covers the first support portion from the rear, and a second projection that covers the second support portion from the rear. The amount by which the second protrusion protrudes from the base portion is set to be smaller than the amount by which the first protrusion protrudes. The vehicle seat structure according to claim 5, characterized in that the second space is formed between the lower end of the side back portion and the second protrusion in the vertical direction. [Claim 7] The vehicle seat structure according to claim 5 or 6, characterized in that the second space corresponds in the vertical direction to the space between the lower part of the lower back portion and the side back portion. [Claim 8] The lower part of the side back portion on the inner side in the seat width direction is provided with an inclined portion that slopes outward in the seat width direction as it goes downward. The vehicle seat structure according to any one of claims 5 to 7, characterized in that the second cable routing portion is positioned further inward in the seat width direction than the inwardly inclined portion. [Claim 9] A portion of the aforementioned cable routing material is routed along the side frame, The second support portion is provided with a guide portion for adjusting the routing direction of the cable material. The vehicle seat structure according to any one of claims 5 to 8, characterized in that the guide portion is configured to guide the routing direction of the cable material from a direction along the side frame to a direction along the lower frame, above the second space.

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