Seat back

Abstract

To make the wiring harness routing on the back of the seatback, where electrical components are installed, more compact. [Solution] The seat back frame (10) has a pair of side frames (11A, 11B) and an upper frame (12) that extends in the left-right direction and has both ends joined to the upper part of the pair of side frames, a harness (71, 72A, 72B, 73) for supplying power and signals to a display device attached to the upper frame, and harness fixing parts (81, 82A, 82B) for fixing the harness to the upper frame, wherein the harness fixing parts are positioned forward in the front-rear direction of the seat from the rear end of the upper frame.

Description

Technical Field

[0001] The present invention relates to a seat back equipped with electrical components.

Background Art

[0002] Conventionally, some seat backs of vehicle seats are equipped with electrical components such as monitors and blowers. For example, Patent Document 1 describes an invention related to an attachment structure for attaching a monitor to the upper back surface of a seat back. Also, Patent Document 3 describes an invention related to a structure for fixing a blower to a seat back frame. Patent Document 4 describes an invention related to a structure for fixing a portable device to a seat back frame. In the inventions described in Patent Documents 1 and 2 above, a technique for attaching a monitor to the upper part of a seat back frame via a bracket is disclosed. Also, in the invention described in Patent Document 3, a technique for attaching a blower to the upper part of a seat back frame via a bracket is disclosed. The invention described in Patent Document 4 discloses a technique for attaching a portable device to the upper back surface of a seat back frame via a fixing member (bracket). Also, in Patent Document 4, a technique for providing a harness fixing portion on the attachment surface of the fixing member on the back surface of the portable device is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

[0004] While the inventions described in Patent Documents 1 to 3 disclose a structure for attaching electrical components such as a monitor and a blower to a seat back frame, they do not describe how to arrange the harnesses that supply power to the monitor and blower or transmit signals. Furthermore, while Patent Document 4 discloses a technology in which a harness fixing portion is provided on the mounting surface of a fixing member, the harness fixing portion is located near the portable device that receives power and signals via the harness, i.e., on the upper part of the back seat, and there is no description of fixing portions for other parts of the harness.

[0005] Therefore, there is a problem in that when a load is applied to the seat back or due to vehicle vibrations, the harness may shake within the space behind the seat back, potentially causing a connection failure. Furthermore, since the inventions in Patent Documents 1 to 4 involve only one electrical component, the number of harnesses is small and may not pose much of a problem. However, when multiple electrical components such as monitors, blowers, and speakers are installed on the seatback, multiple harnesses will be routed inside or on the back of the seatback. Therefore, if the harnesses are routed haphazardly, the space required for routing the harnesses will become large, the back of the seatback will become cluttered, making repair and inspection work difficult, and there is a risk that the harnesses will rub against each other due to vehicle vibrations, causing connection problems.

[0006] This invention was made in view of the above-mentioned problems, and aims to make the wiring harness routing on the back of the seat back equipped with electrical components more compact. Another object of the present invention is to make it less likely for wiring harness connection problems to occur in a seat back equipped with electrical components. [Means for solving the problem]

[0007] To solve the above problem, the seat back according to the invention described in claim 1 is: A seat back frame having a pair of side frames and an upper frame extending in the left-right direction and having both ends joined to the upper parts of the pair of side frames, A harness for supplying power and signals to electrical components attached to the aforementioned seat back frame, It has a harness fixing part for fixing the harness to the upper frame, The harness fixing portion is characterized in that it is positioned forward of the rear end of the upper frame in the seat-front-rear direction.

[0008] The invention described in claim 2 is, in the seat back described in claim 1, The upper frame has a base portion and a protruding surface portion that protrudes forward from the base portion in the seat front-rear direction, The harness fixing portion is characterized by being positioned in the space formed by the protruding surface portion.

[0009] The invention described in claim 3 is, in the seat back described in claim 2, The upper frame has a first mounting member that is fixed to the rear of the seat, A second mounting member is fixed to the first mounting member from the rear of the seat, The harness fixing part is, A first fixing part for fixing the harness to the first mounting member, The harness is fixed to the second mounting member by a second fixing part, The second fixing portion is characterized by being positioned further forward in the seat-front-rear direction than the first fixing portion.

[0010] The invention described in claim 4 is, The first mounting member is, The upper frame has a first base portion which is joined to the rear surface of the base portion, The sheet is characterized by being formed in a shape that does not have any overlapping portion with the second fixing portion when viewed from the front.

[0011] The invention according to claim 5 is the seat back according to claim 4, wherein the first attachment member is provided with a pair of electrical component attachment means for attaching an electrical component to the seat back frame, the second fixing portion is disposed between the pair of electrical component attachment means in the seat width direction.

[0012] The invention according to claim 6 is the seat back according to claim 5, wherein the second attachment member is formed to have a pair of protection portions extending along the outer shape of the pair of electrical component attachment means, the second fixing portion is disposed between the pair of protection portions in the seat width direction.

[0013] The invention according to claim 7 is the seat back according to any one of claims 4 to 6, wherein the second attachment member has a cover member fixed from the rear of the seat, the cover member is disposed so as to cover at least the first fixing portion from the rear.

[0014] The invention according to claim 8 is the seat back according to claim 7, wherein the second attachment member has a second base portion parallel to the first base portion of the first attachment member, and a second protruding surface portion protruding forward in the seat front-rear direction more than the second base portion, and the second fixing portion is disposed on the second protruding surface portion.

[0015] The invention according to claim 9 is the seat back according to claim 8, wherein the first attachment member has a third protruding surface portion protruding forward in the seat front-rear direction more than the first base portion at a side portion in the seat width direction, and the third protruding surface portion is disposed rearward of the second protruding surface portion at a side portion in the seat width direction.

[0016] The invention described in claim 10 is, in the seat back described in claim 9, The first mounting member has a welded portion at the upper end of the first base portion which is welded to the upper frame, The second mounting member is characterized by being positioned to avoid the welded portion. [Effects of the Invention]

[0017] According to the invention described in claim 1, the harness fixing portion for securing the harness to the upper frame is positioned forward of the rear end of the upper frame in the seat-front-rear direction, so that the harness can be compactly arranged in the back space of the seat back.

[0018] According to the invention described in claim 2, the harness can be routed more compactly in the space behind the seat back.

[0019] According to the invention described in claim 3, a first mounting member and a second mounting member are provided on the back of the seat back frame, a first fixing part for the harness is provided on the first mounting member, and a second fixing part for the harness is provided on the second mounting member, so that multiple harnesses can be arranged in an orderly manner.

[0020] According to the invention described in claim 4, the second fixing portion can be positioned forward of the rear end of the first mounting member, so that the harness can be routed more compactly in the space behind the seat back.

[0021] According to the invention described in claim 5, it is possible to make the mounting structure for attaching an electrical component (monitor) to the seat back frame more compact in the seat width direction.

[0022] According to the invention described in claim 6, the harness can be protected from interference with the edge of the electrical component mounting means (bracket) and thus not damaged.

[0023] According to the invention described in claim 7, the first fixing part that secures the harness to the seat back is protected by the cover member, making it difficult for the harness to come off the seat back.

[0024] According to the invention described in claim 8, the second fixing portion of the harness is positioned in front of the second base portion, which contributes to making the seat more compact in the front-to-rear direction.

[0025] According to the invention described in claim 9, the third protruding surface of the first mounting member is positioned further back than the second protruding surface of the second mounting member, which contributes to making the seat more compact in the front-rear direction.

[0026] According to the invention described in claim 10, it is possible to make the seat more compact in the front-rear direction. [Brief explanation of the drawing]

[0027] [Figure 1] This is a front view of the upper frame provided on the upper part of the seat back frame, which forms the skeleton of the seat back according to the present invention. [Figure 2] Figure 1 is a rear perspective view showing the blower attached to the upper frame. [Figure 3] This figure shows an embodiment of the first mounting member that is positioned to cover the blower unit on the rear of the upper frame; (A) is a front view and (B) is a perspective view. [Figure 4] This is a rear view showing the first mounting member, which constitutes the monitor and harness mounting structure shown in Figure 3, attached to the upper frame. [Figure 5] This diagram shows an embodiment of a second mounting member disposed on the back of a first mounting member covering a blower unit, with (A) being a front view and (B) being a perspective view. [Figure 6] Figure 5 is a rear view showing the second mounting member attached to the back of the first mounting member. [Figure 7]This is a rear view showing an embodiment of a backboard that covers the back of a seat back. [Figure 8] (A) is a front view showing the harness with a cover case attached to the back of the mounting structure, and (B) is a perspective view showing an example of the cover case. [Figure 9] This is a rear view showing a modified example of the harness mounting structure of the embodiment. [Modes for carrying out the invention]

[0028] Embodiments of the seat back and vehicle seat according to the present invention will be described below with reference to the drawings. Figure 1 is a front view of the upper frame provided on the upper part of the seat back frame, which forms the skeleton of the seat back, and Figure 2 is a rear perspective view showing the upper frame of Figure 1 with a blower attached. In the following description, unless otherwise specified, the direction of travel of the vehicle will be referred to as the front, and the opposite direction as the rear.

[0029] As shown in Figure 1, the seat back according to this embodiment comprises a seat back frame 10 that is formed in a substantially inverted U shape when viewed from the front-rear direction of the seat, having a pair of left and right side frames 11A and 11B and a steel upper frame 12 provided in the width direction spanning between the upper ends of the side frames 11A and 11B. The upper frame 12 and the side frames 11A and 11B are rigidly joined by welding. Although not shown in the diagram, a lower frame is horizontally mounted and rigidly connected between the lower ends of the side frames 11A and 11B. On the front side of the seat back frame 10, a cushion pad made of foamed rubber or foamed urethane, and a pan frame that supports the cushion pad are arranged, and the surface of the cushion pad is covered with a skin.

[0030] When the seat back according to this embodiment is used in a vehicle seat, the lower end of the seat back frame 10 is connected via a hinge to the rear end of the seat cushion frame, which forms the skeleton of the seat cushion, so as to be tiltable. A headrest is also attached to the upper part of the seat back frame 10. The side frames 11A and 11B, which form the framework of the seat back, may be composed of an inner side frame and an outer side frame, or they may be composed of pipes or pan frames.

[0031] In this embodiment, the upper frame 12 has a lower base portion 121 and a protruding surface portion 122 that protrudes forward from the base portion 121, and is provided with an opening 12a for inserting the blower and bracket described later. As shown in Figure 2, there is a horizontal piece portion 123 between the base portion 121 and the protruding surface portion 122, and an opening is also provided in this horizontal piece portion 123, so that the opening 12a is formed to form an L shape in side view from the base portion 121 to the protruding surface portion 122. As described above, the protruding surface portion 122 has a shape that protrudes forward from the base portion 121, and the opening 12a is formed from the base portion 121 to the protruding surface portion 122, so that a storage recess capable of housing the blower is formed.

[0032] Furthermore, both sides of the upper frame 12 are provided with joining surfaces 124 that are joined and fixed to the side frames 11A and 11B. Furthermore, the base portion 121 of the upper frame 12 is provided with two engagement holes 12b for connecting the bracket 22 to the upper frame 12 by engaging with the boss portion 22f (see Figure 2) provided on the bracket 22 for blower mounting.

[0033] The blower is positioned on the front side of the bracket 22. The blower and bracket 22 are integrated by engaging multiple (for example, three) engagement holes on the back of the blower case with multiple engageable bosses on the corresponding parts of the front of the bracket 22. The integrated unit is then placed and stored in the aforementioned storage recess.

[0034] Furthermore, three rib- or claw-shaped locking pieces 22g are formed on the front end of the upper wall of the bracket 22, projecting upward. Of these three locking pieces 22g, the central one and the two on the left and right are formed to be arranged in a nearly straight line when viewed from above, with a spacing that allows for the insertion of a flat plate several millimeters thick. In the seat back of this embodiment, as described above, the blower and the bracket 22 are integrated, and one opening (upper side) of the duct 23 is connected to the intake port of the blower (hereinafter referred to as the blower unit), which is then attached to the upper frame 12. At that time, the three locking pieces 22g provided on the upper part of the bracket 22 are engaged with the upper edge of the opening 12a of the upper frame 12.

[0035] As a result, the upper part of the blower mounting bracket 22 is locked to the protruding surface 122 of the upper frame 12 by the central locking piece 22g and the two locking pieces 22g on the left and right sides, which sandwich the upper edge of the opening 12a from the front and back. Furthermore, a pair of boss portions 22f on the back of the bracket 22 are engaged with engagement holes 121 provided in the upper frame 12. As a result, as shown in Figure 2, the blower unit 20 can be mounted on the upper part of the seat back frame 10 with the blower unit 20 positioned within the opening 12a of the upper frame 12.

[0036] The other (lower) opening of the duct 23 is connected to an opening of a corresponding size formed in a lumbar support that supports the back of the cushion pad of the seat back (not shown), or in a sheet that covers the back of the cushion pad. Furthermore, in this embodiment, the blower is positioned such that its air outlet 21a faces downward and is offset to the right from the center line of the sheet, and the duct 23 is positioned vertically closer to the center of the sheet than the air outlet 21a of the blower.

[0037] Furthermore, in this embodiment, as shown in Figure 2, the upper end of a strip-shaped mounting plate 24 is fixed to one side (the left side in the figure) of the front surface of the protruding surface 122 of the upper frame 12, and hangs down. Here, since the protruding surface 122 is located in front of the base portion 121, the mounting plate 24, whose upper end is fixed to the front surface of the protruding surface 122, hangs down from the protruding surface 122. As a result, the lower part of the mounting plate 24 is separated in front of the base portion 121 and protrudes below the lower end of the upper frame 12, creating a spatial clearance.

[0038] Therefore, utilizing the space described above, a connector 25, which will serve as a socket (or plug), is attached to the lower back of the mounting plate 24. Specifically, a hole for securing the connector 25 is formed at the lower end of the mounting plate 24, and the connector 25 is secured to the mounting plate 24 by inserting the fastening part (projection) of the connector 25 into this hole. The end of the electric wire (lead wire) 26 drawn out from the blower is connected to this connector 25. In addition, a plug (or socket) connector provided at the end of the power supply harness 27, which is located on the back of the seat back, is plugged into the connector 25, making it possible to supply power. As described above, by providing a mounting plate 24 on the upper frame 12 and attaching the connector 25 to it, the power supply harness can be fixed with the connector, making it less likely for poor contact to occur compared to when the harness is movable.

[0039] Next, an example of a mounting structure for a monitor and harness provided on the back of the seatback will be described using Figures 3 to 6. Figure 3 shows an embodiment of the first mounting member 50 disposed on the back of the upper frame 12, and Figure 4 shows the state in which the first mounting member 50 is attached to the back of the upper frame 12.

[0040] The first mounting member 50 described above is made of a high-strength metal plate and has a horizontally elongated base portion 51 at its lower end, with a wide U-shaped notch 50a in the center. Furthermore, a protruding piece 52 that projects upward is provided in the center of the upper edge of the base portion 51, and below the protruding piece 52 of the base portion 51 is an insertion hole 51a into which the base of the harness fixing clip, described later, is inserted.

[0041] Furthermore, the wing portions 53 located on both sides of the notch 50a are formed to bulge forward, and a pair of extensions 54 extending forward are formed at the upper ends of the edges of the wing portions 53 where the notch 50a is located. These extensions 54 protrude into the space below the upper wall of the upper frame 12 and have the function of positioning by partially contacting the inner surface of the upper wall of the upper frame 12. In addition, the upper edges of the wing portions 53 are fixed to the upper back surface of the upper frame 12 by welding.

[0042] As described above, the upper frame 12 of this embodiment has a complex shape with irregularities, so using thick sheet metal would make it difficult to process. On the other hand, because there is an opening 12a, if the sheet metal is thin, there is a risk of insufficient strength. However, since the metal first mounting member 50 is disposed on the back of the upper frame 12, the upper frame 12 can be reinforced, thereby avoiding the risk of insufficient strength at the top of the seat back frame. In other words, the first mounting member 50 also functions as a means of reinforcing the upper frame 12.

[0043] Furthermore, a pair of fixing holes 51b are formed at both ends of the base portion 51 of the first mounting member 50, through which screws or blind rivets for fixing the first mounting member 50 to the side frames 11A and 11B are inserted. On the other hand, as shown in Figure 4, reinforcing panels 13A and 13B are joined to the back of the side frames 11A and 11B, and the reinforcing panels 13A and 13B have fixing pieces 13a and 13b that protrude toward the center of the seat back. The base portion 51 of the first mounting member 50 is fixed to the fixing pieces 13a and 13b by screws or rivets through a pair of fixing insertion holes 51b. Instead of providing the fixing pieces 13a and 13b, protruding pieces that protrude laterally may be provided on both sides of the base portion 51, and these protruding pieces may be fixed to the reinforcing panel or side frame.

[0044] Furthermore, as shown in Figure 4, a pair of monitor mounting brackets 14A and 14B, which form a U-shape when viewed from the rear, are welded to the upper parts of the left and right wing portions 53 of the first mounting member 50 with the openings facing downwards. Bolt insertion holes (not shown) for inserting bolts 15A and 15B for fixing the monitor are formed in the upper horizontal portions of these brackets 14A and 14B, and the mounting portion on the back of the monitor case is fixed to the brackets 14A and 14B by the bolts 15A and 15B, thereby enabling the monitor to be attached to the back of the seat back. Alternatively, instead of fixing the brackets 14A and 14B to the first mounting member 50, a means for mounting electrical components with the same function as the brackets may be directly provided on the first mounting member 50 by deforming a part of the first mounting member 50 to form bolt insertion holes. Furthermore, as shown in Figure 3, a pair of engagement holes 51c are provided near both sides of the insertion hole 51a in the base portion 51 of the first mounting member 50 for connecting the second mounting member 60, which will be described below, to the first mounting member 50.

[0045] Figure 5 shows an embodiment of the second mounting member 60 disposed on the back of the first mounting member 50, and Figure 6 shows the state in which the second mounting member 60 is attached to the back of the first mounting member 50. The second mounting member 60 is formed in the shape of a plate from a non-conductive synthetic resin, and has an opening 60a in the center corresponding to the insertion hole 51a of the first mounting member 50. One reason for providing the second mounting member 60 is to realize a harness organization function that consolidates and neatly arranges multiple harnesses. Therefore, the second mounting member 60 functions as a harness organization plate. In addition, the second mounting member 60 has the function of preventing electrical contact between the harness, which is arranged on the back of the seat back, and the metal first mounting member 50 for attaching the monitor.

[0046] As shown in Figure 5(B), a pair of locking protrusions 61 are formed near both sides of the opening 60a on the surface of the second mounting member 60 facing the first mounting member 50. These locking protrusions 61 are inserted into engagement holes 51c provided in the base portion 51 of the first mounting member 50, thereby mounting the second mounting member 60 to the back surface of the first mounting member 50, as shown in Figure 6. In this state, the opening 60a provided in the second mounting member 60 (see Figure 5(B)) aligns with the insertion hole 51a (see Figure 3(B)) for the harness fixing clip provided in the first mounting member 50, and the insertion hole 51a is exposed within the opening 60a.

[0047] Furthermore, a pair of protruding wall portions 62 are provided on both sides of the second mounting member 60 to avoid interference with the harness, and the portion sandwiched between the pair of protruding wall portions 62 above the central opening 60a is a protruding surface portion that protrudes forward, and this protruding surface portion is provided with an insertion hole 60b into which the base of the clip for fixing the harness is inserted, and an insertion hole 60c into which the mounting portion of the connector for connecting the harnesses is inserted. As described above, the pair of protruding wall portions 62 are provided to protect the harness from interference and damage to the edges of the brackets 14A and 14B, which serve as mounting means for electrical components. In other words, the pair of protruding wall portions 62 function as protective parts for the harness. Furthermore, a protruding surface is provided in the portion sandwiched between the pair of protruding wall portions 62 of the second mounting member 60, and the second fixing portion of the harness (insertion holes 60b, 60c) is provided in this protruding surface, which contributes to making the seat more compact in the front-rear direction.

[0048] In the seat back of this embodiment, as shown in Figure 6, the harness bundle 71, which is made up of multiple harnesses, is fixed by inserting it into the insertion hole 51a exposed in the opening 60a of the second mounting member 60 while being gripped by a clip 81A. In addition, the branch harnesses 72A and 72B that branch off from the harness bundle 71 are provided with connectors 82A and 82B, and the branch harnesses 72A and 72B are fixed by inserting the connectors 82A and 82B into the insertion hole 60c. Furthermore, the harness bundle 73, which is made up of branch harnesses 72C and 72D connected to the other side of connectors 82A and 82B, is fixed by inserting it into the insertion hole 60b while being gripped by a clip 81B.

[0049] As described above, by providing the second mounting member 60 and consolidating multiple harnesses in one place and securing them with clips or the like, in a seat back where multiple harnesses are arranged on the back due to the incorporation of multiple electrical components, the multiple harnesses arranged on the back can be arranged in an orderly manner, and situations in which poor contact occurs due to the harnesses shaking and coming into contact with each other due to vehicle vibrations can be avoided. Furthermore, according to the above embodiment, the harness fixing parts (60b, 60c) that secure the harness to the upper frame are positioned forward in the seat-front-rear direction from the rear end of the upper frame 12, so that the harnesses 72A to 72D can be compactly arranged in the back space of the seat back. Furthermore, a first mounting member 50 and a second mounting member 60 are provided on the back of the seat back frame 10, with a first fixing part (insertion hole 51a) for the harness provided on the first mounting member 50 and a second fixing part (insertion holes 60b, 60c) for the harness provided on the second mounting member 60, so that multiple harnesses can be routed in an orderly manner.

[0050] In the above embodiment, an opening 60a is provided in the second mounting member 60, and the harness bundle 71 is fixed to the insertion hole 51a provided in the base portion 51 of the inner first mounting member 50 by a clip 81A. However, a similar insertion hole may be provided in the second mounting member 60, and the harness bundle 71 may be fixed to the second mounting member 60 with a clip. However, since the second mounting member 60 is made of synthetic resin, while the first mounting member 50 is made of metal, fixing the harness bundle 71 to the first mounting member 50 as in the above embodiment provides a more secure fixation.

[0051] Furthermore, a hook 63 is provided at the center of the lower rear surface of the second mounting member 60. By engaging a locking hole 91a, which is provided at the end of the backboard 91 (see Figure 7) and has a shape corresponding to the hook 63, with this hook 63, the upper end of the backboard 91 can be locked in place. The backboard 91 is a member that is attached to cover the back of the seat back. Its lower edge is pre-attached to the lower part of the seat back. After the harness is positioned in the back space of the seat back and fixed to the first mounting member 50, the upper end is lifted to cover the back of the seat back, and the locking hole 91a is engaged with the hook 63 to complete the installation. While it is conceivable that the hook 63 for securing the upper end of the backboard 91 could be provided at the bottom of the first mounting member 50, providing it at the bottom of the second mounting member 60 has the advantage of making it easier to engage the locking hole 91a of the backboard 91 with the hook.

[0052] Furthermore, in this embodiment, as shown in Figure 8(A), a cover case 92 is attached to the rear of the second mounting member 60 so as to cover the back of the second mounting member 60. The cover case 92 is positioned to cover at least the first fixing part (insertion hole 51a) from the rear. This protects the fixing part of the harness from contact with foreign objects and makes it less likely for the harness to come off the seat back.

[0053] Figure 8(B) shows details of the cover case 92. As shown in Figure 8(B), a pair of upwardly extending arm portions 92a are formed on both sides of the cover case 92, and L-shaped locking pieces 92b are provided at the tips of each arm portion 92a, which engage with the inner edges of the upper ends of the side frames 11A and 11B. In addition, a pair of forwardly projecting locking claws 92c are provided on the lower edge of the cover case 92, and these locking claws 92c engage with the lower edge of the second mounting member 60. In this way, the cover case 92 is fixed to the back of the seat back.

[0054] (modified version) Figure 9 shows a modified example of the above embodiment. This modified version omits the second mounting member 60 for securing the harness, which is located on the back of the upper frame 12 in the above embodiment. The base of the clip 81A that grips the harness bundle 71 is inserted into the insertion hole 51a provided in the center of the first mounting member 50 and secured in the same way as in the above embodiment. On the other hand, the connectors 82A and 82B connected to the branch harnesses 72A and 72B are secured to insertion holes provided in the upper frame 12, and the harness bundle 73 is secured by the clip 81B to a locking piece provided on the upper part of the blower bracket 22. This configuration allows for a reduction in the number of parts compared to the above embodiment, while still providing the function of fixing the harness in a predetermined position.

[0055] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be implemented with various modifications without departing from the spirit of the invention. For example, in the above embodiment, the case in which a monitor and a blower are equipped as electrical components on the seat back was described, but it goes without saying that the invention can also be applied to cases in which other electrical components such as speakers are equipped on the seat back in addition to the monitor and blower, and the same effects as in the above embodiment can be obtained by doing so.

[0056] Furthermore, although the blower unit 20 is located on the upper frame 12 in the above embodiment, it may be located in other positions, and a configuration without a blower is also possible. Furthermore, while the above embodiments described an example of applying the seat back according to the present invention to a vehicle seat, the present invention is not limited to vehicle seats and can also be applied to seats for vehicles such as ships and aircraft. [Explanation of symbols]

[0057] 10 Seat back frame 11A, 11B Side Frame 12 Upper frame 14A, 14B Monitor mounting bracket (electrical component mounting method) 121 Base section 122 Projecting surface part 123 Horizontal piece 124 Joint surface part 20 Blower Units 22 Blower mounting bracket 24 Mounting plate 25 connectors 26 Electric wires (lead wires) 27 Harness 50 First mounting member 50a Notch 51 Base section 51a insertion hole 52 Projecting piece 53 Both wings 54 Extension 60 Second mounting member 60a opening 60b,60c insertion hole 61 Locking protrusion 62 Overhanging wall section 63 Locking protrusion 71,73 Harness bundle 72A, 72B Branch Harness 81 clips 82A, 82B connectors 91 Backboard 91a Locking hole 92 Cover Cases

Claims

1. A seat back frame having a pair of side frames and an upper frame extending in the left-right direction and having both ends joined to the upper parts of the pair of side frames, A harness for supplying power and signals to electrical components attached to the aforementioned seat back frame, It has a harness fixing part for fixing the harness to the upper frame, The seat back is characterized in that the harness fixing portion is positioned forward in the seat-front-rear direction of the upper frame compared to the rear end of the upper frame.

2. The upper frame has a base portion and a protruding surface portion that protrudes forward from the base portion in the seat front-rear direction, The seat back according to claim 1, characterized in that the harness fixing portion is arranged in the space formed by the protruding surface portion.

3. The upper frame has a first mounting member that is fixed to the rear of the seat, A second mounting member is fixed to the first mounting member from the rear of the seat, The harness fixing part is, A first fixing part for fixing the harness to the first mounting member, The harness is fixed to the second mounting member by a second fixing part, The seat back according to claim 2, characterized in that the second fixing portion is positioned further forward in the seat-front-rear direction than the first fixing portion.

4. The first mounting member is, The upper frame has a first base portion which is joined to the rear surface of the base portion, The seat back according to claim 3, characterized in that it is formed in a shape that does not have any portion that overlaps with the second fixing portion when viewed from the front of the seat.

5. The first mounting member is provided with a pair of electrical component mounting means for attaching electrical components to the seat back frame. The seat back according to claim 4, characterized in that the second fixing portion is disposed between the pair of electrical component mounting means in the seat width direction.

6. The second mounting member is formed to have a pair of protective portions that extend along the outer shape of the pair of electrical component mounting means, The seat back according to claim 5, characterized in that the second fixing portion is disposed between the pair of protective portions in the seat width direction.

7. The second mounting member has a cover member that is fixed from the rear of the seat, The seat back according to any one of 4 to 6, characterized in that the cover member is arranged to cover at least the first fixing portion from the rear.

8. The second mounting member is The first mounting member has a second base portion that is parallel to the first base portion, A second protruding surface portion that protrudes forward in the seat-front-rear direction from the second base portion, The seat back according to claim 7, wherein the second fixing portion is arranged on the second protruding surface portion.

9. The first mounting member is, The side portion in the width direction of the seat has a third protruding surface portion that protrudes forward in the front-rear direction of the seat compared to the first base portion, The seat back according to claim 8, characterized in that the third protruding surface is positioned rearward from the second protruding surface.

10. The first mounting member has a welded portion at the upper end of the first base portion which is welded to the upper frame, The seat back according to claim 9, characterized in that the second mounting member is arranged to avoid the welded portion.

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