Seat back and vehicle seat

Abstract

To improve safety when a crewman uses a shoulder area of a seat back as a handrail or a scaffolding.SOLUTION: A seat back 14 comprises: a seat back body 18 which supports a back part of a crewman in a vehicle; and a resin part 44 which comprises a resin, and constitutes a design surface of a shoulder area on a vehicle width direction inner side of the seat back body. The resin part 44 is supported by a frame of the seat back body 18. A hole 46, which opens on both sides in a seat longitudinal direction, is formed in the resin part 44.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a seat back. [Background technology]

[0002] Patent Document 1 below discloses a vehicle seat to be mounted on a large truck or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-141104 Summary of the Invention [Problem to be solved by the invention]

[0004] Occupants of large trucks and other vehicles sometimes move to the rear space of the cabin or the second floor of the cabin to take a nap. When moving, the occupants may use the shoulder area of ​​the seatback on the inside of the vehicle width direction as a handrail or foothold. However, in the above-mentioned prior art, the shoulder area on the inside of the seatback in the vehicle width direction is made of a cushioning material and an upholstery material, which results in insufficient rigidity. Therefore, there is room for improvement in terms of improving safety.

[0005] An object of the present invention is to provide a seat back and a vehicle seat that can improve safety when an occupant uses the shoulder portion of the seat back as a handrail or foothold. [Means for solving the problem]

[0006] The seat back of the first embodiment comprises a seat back main body that supports the back of a vehicle occupant, and a resin portion that is made of resin and forms a design surface of the shoulder portion on the inside of the vehicle width direction of the seat back main body, is supported by the frame of the seat back main body, and has holes or recesses that open on both sides of the front-to-rear direction of the seat.

[0007] In the seat back of the first aspect, the seat back main body supports the back of a vehicle occupant. The design surface of the shoulder portion on the inside of the seat back main body in the vehicle width direction is formed by a resin part made of resin. This resin part has holes or recesses that open on both sides in the front-rear direction of the seat. This allows the occupant to hook their fingers into the holes or recesses when using the resin part as a handrail. Moreover, because this resin part is supported by the frame of the seat back main body, rigidity can be ensured when the occupant uses the resin part as a handrail or foothold. This increases the safety of the occupant.

[0008] The seat back of the second aspect is the seat back of the first aspect, wherein the hole or recess is formed vertically long.

[0009] The seat back of the second aspect is configured as described above, so that, for example, when an occupant grips the resin portion from the outside in the left-right direction of the seat, the occupant can easily hook the fingers thereon.

[0010] The seat back of a third aspect is the seat back of the first or second aspect, wherein part of the outer edge of the resin portion and part of the hole edge are formed parallel to each other.

[0011] The seat back of the third aspect is configured as described above, and therefore, for example, clamp-type aftermarket parts (for example, electrical equipment such as a microphone speaker) can be easily attached to the resin portion.

[0012] A seat back of a fourth aspect is any one of the first to third aspects, wherein the width of the upper surface of the resin portion in the seat front-rear direction is set to 40 millimeters or more.

[0013] The seat back of the fourth aspect is configured as described above, so that the occupant can easily place his / her feet on the upper surface of the resin portion.

[0014] The seat back of the fifth aspect is any one of the first to fourth aspects, wherein the frame has a shoulder reinforcement portion arranged within the resin portion so as to surround the hole or recess when viewed in the fore-and-aft direction of the seat.

[0015] In the seat back of the fifth aspect, the resin portion is reinforced by the shoulder reinforcing portion, so that rigidity can be easily ensured when an occupant uses the resin portion as a handrail or foothold.

[0016] The seat back of the sixth aspect is any one of the first to fifth aspects, in which the resin part is set so that the thickness in the front-to-rear direction of the seat of the grip part located on the outside of the left-to-right direction of the seat relative to the hole or recess is smaller than the thickness in the front-to-rear direction of the seat of the step part located on the upper side of the seat relative to the hole or recess.

[0017] The seat back of the sixth aspect is configured as described above, so that it is possible to achieve both ease of gripping when the occupant grasps the grip portion of the resin part and ease of placing the occupant's feet when using the step portion of the resin part as a foothold.

[0018] The seat back of the seventh aspect is any one of the first to sixth aspects, in which the grip portion of the resin part, which is located on the outside in the left-right direction of the seat relative to the hole or recess, has bumps and grooves aligned in the up-down direction of the seat.

[0019] The seat back of the seventh aspect is configured as described above, so that when an occupant grips the grip portion of the resin portion, the occupant's hands are less likely to slip off the grip portion.

[0020] The seat back of an eighth aspect is any one of the first to seventh aspects, wherein the resin portion has an upper surface of a step portion located on the seat upper side with respect to the hole or recess, and the upper surface of the step portion has concaves and convexes aligned in the left-right direction of the seat.

[0021] The seat back of the eighth aspect is configured as described above, so that when an occupant uses the step portion of the resin portion as a foothold, the occupant's feet are less likely to slip on the step portion.

[0022] The seat back of a ninth aspect is any one of the first to eighth aspects, wherein a slit is formed in the resin portion, dividing the resin portion into two in the seat front-rear direction.

[0023] The seat back of the ninth aspect is configured as described above, so that it is possible to achieve both ease of gripping when the occupant grasps the grip portion of the resin part and ease of placing the occupant's feet when using the step portion of the resin part as a foothold.

[0024] A vehicle seat according to a tenth aspect includes a seat cushion on which a vehicle occupant sits, and a seat back according to any one of the first to ninth aspects, which supports the back of the occupant with the seat back main body.

[0025] In the vehicle seat of the tenth aspect, the back of the occupant seated on the seat cushion is supported by the seat back main body of the seat back. This seat back is one of the first to ninth aspects, and therefore the above-mentioned effects can be obtained. [Effects of the Invention]

[0026] As described above, according to the present invention, it is possible to improve safety when an occupant uses the shoulder portion of the seat back as a handrail or foothold. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a perspective view showing a vehicle seat according to a first embodiment. [Figure 2] 1 is a front view showing a portion of a vehicle seat according to a first embodiment. [Figure 3] 1 is a perspective view showing a part of a vehicle seat according to a first embodiment. [Figure 4]1 is a front view showing a part of a frame of a vehicle seat according to a first embodiment. [Figure 5] 1 is a perspective view showing a part of a frame of a vehicle seat according to a first embodiment. [Figure 6] FIG. 2 is an explanatory diagram showing an example of how to use the vehicle seat according to the first embodiment. [Figure 7] FIG. 10 is a front view showing a portion of a vehicle seat according to a second embodiment. [Figure 8] FIG. 10 is a front view showing a portion of a vehicle seat according to a third embodiment. [Figure 9] FIG. 10 is a perspective view showing a portion of a vehicle seat according to a fourth embodiment. [Figure 10] FIG. 11 is a perspective view showing a part of a vehicle seat according to a fifth embodiment. [Figure 11] FIG. 13 is a perspective view showing a portion of a vehicle seat according to a sixth embodiment. [Figure 12] FIG. 13 is a perspective view showing a part of a vehicle seat according to a seventh embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0028] First Embodiment A vehicle seat 10 according to a first embodiment of the present invention will be described below with reference to Figures 1 to 6. Note that in each figure, some reference numerals may be omitted to make the drawings easier to understand. Arrows FR, LH, and UP, which are appropriately depicted in each figure, respectively indicate the front, left, and top of the vehicle seat 10. Hereinafter, when the front-rear, left-right, top-bottom directions are used in the description, they will indicate directions relative to the vehicle seat 10.

[0029] As shown in Fig. 1, a vehicle seat 10 according to the first embodiment includes a seat cushion 12 on which a vehicle occupant sits, a seat back 14 that supports the occupant's back, and a headrest 16 that supports the occupant's head. This vehicle seat 10 is a seat installed in a vehicle such as a large truck or a medium-sized truck, and is disposed on the right side of the cabin. When this vehicle seat 10 is disposed on the left side of the cabin, it has a configuration that is bilaterally symmetrical to this embodiment. The front-rear, left-right, up-down directions of this vehicle seat 10 coincide with the front-rear, left-right, up-down directions of the vehicle.

[0030] 1 to 5, the seat back 14 includes a seat back main body 18 that supports the back of the occupant, and a resin part 44 provided on the upper part of the seat back main body 18. The seat back main body 18 includes a frame 20 that is a framework member, a pad 40 that is a cushioning material attached to the frame 20, and a trim cover 42 that is a skin material that covers the pad 40.

[0031] The frame 20 of the seat back 14 is connected to the frame (not shown) of the seat cushion 12 via a well-known reclining mechanism (not shown), and the seat back 14 is reclined relative to the seat cushion 12. When the seat back 14 is in the upright position shown in Figures 1 to 5, the front-rear, left-right, up-down and front-rear, left-right, up-down directions of the seat back 14 coincide with the front-rear, left-right, up-down directions of the vehicle seat 10.

[0032] 4 and 5, the frame 20 includes two side frames 22 extending in the up-down direction on the left and right sides of the seat back 14, an upper frame 24 connecting the upper ends of the left and right side frames 22 in the left-right direction, and a plurality of intermediate frames 26 connecting the up-down middle portions of the left and right side frames 22 in the left-right direction. The plurality of intermediate frames 26 are arranged at intervals in the up-down direction.

[0033] The left and right side frames 22 are made of, for example, press-formed metal plate material, and the upper frame 24 and intermediate frame 26 are made of, for example, metal pipe material. Two headrest bushings 28, one on the left and one on the right, are attached to the middle part of the upper frame 24 in the left-right direction. Stays 30, which form the framework of the headrest 16, are attached to these headrest bushings 28.

[0034] Two brackets 32, one on each side, are disposed between the left and right side frames 22 and the left and right headrest bushings 28. The left and right brackets 32 are made of, for example, press-formed metal plates, and are disposed with their longitudinal direction extending vertically. The upper frame 24 passes through the vertical middle portions of the left and right brackets 32. The vertical middle portions of the left and right brackets 32 are fixed to the upper frame 24 by welding or other means. The lower ends of the left and right brackets 32 are fixed to the uppermost intermediate frame 26 by welding or other means.

[0035] A retractor 36 that retracts a seat belt 34 is fixed to the right bracket 32. A pipe frame 38 is fixed to the left bracket 32. The pipe frame 38 is made of, for example, a bent metal pipe material, and has a generally inverted L shape when viewed in the front-to-rear direction. One end of the pipe frame 38 is fixed to the upper end of the left bracket 32 ​​by means of welding or the like. The other end of the pipe frame 38 is fixed to the upper end of the left side frame 22 by means of welding or the like.

[0036] The resin portion 44 provided on the upper part of the seat back main body 18 is made of, for example, injection-molded resin, and forms the design surfaces of the left and right shoulder portions of the seat back main body 18. This resin portion 44 integrally includes an inner resin portion 44A arranged on the left side of the headrest 16 (here, the inner side in the vehicle width direction), an outer resin portion 44B arranged on the right side of the headrest 16 (here, the outer side in the vehicle width direction), and a lower resin portion 44C arranged below the headrest 16.

[0037] The inner resin portion 44A forms the design surface of the shoulder portion on the inner side in the vehicle width direction of the seatback main body 18. A hole 46 that penetrates the inner resin portion 44A in the front-to-rear direction is formed in this inner resin portion 44A. The outer resin portion 44B forms the design surface of the shoulder portion on the outer side in the vehicle width direction of the seatback main body 18. An escutcheon 48 through which the seat belt 34 is inserted is attached to this outer resin portion 44B.

[0038] In this embodiment, the resin portion 44 has the inner resin portion 44A and the outer resin portion 44B, but this is not limiting, and the resin portion 44 may be configured without the outer resin portion 44B. In that case, for example, the shoulder portion on the outer side of the seat back main body 18 in the vehicle width direction is configured to be formed by the pad 40 and the trim cover 42.

[0039] The hole 46 is open at the front and rear surfaces of the inner resin portion 44A. The hole 46 is generally rectangular in a front-to-rear view and is elongated in the up-to-down direction. As shown in FIG. 4 , the frame 20 of the seatback main body 18 has a shoulder reinforcement portion 20A disposed within the inner resin portion 44A so as to surround the hole 46 in a front-to-rear view. The shoulder reinforcement portion 20A is formed in an annular shape by the pipe frame 38, a portion of the left bracket 32, a portion of the left side frame 22, and a portion of the upper frame 24. The inner resin portion 44A is supported by the shoulder reinforcement portion 20A.

[0040] The portion of the inner resin part 44A located on the left side (outside in the left-right direction) of the hole 46 is a grip part 44A1 that can be grasped by the occupant. The grip part 44A1 is generally plate-shaped with the longitudinal direction extending vertically and the plate thickness direction extending horizontally. The portion of the inner resin part 44A located above the hole 46 is a step part 44A2 that the occupant can use as a foothold. The step part 44A2 is generally plate-shaped with the longitudinal direction extending substantially horizontally and the plate thickness direction extending substantially vertically.

[0041] A portion of the outer edge of the inner resin portion 44A is formed parallel to a portion of the edge of the hole 46. Specifically, a portion of the left side and a portion of the right side of the grip portion 44A1 are formed parallel to each other, and a portion of the upper surface and a portion of the lower surface of the step portion 44A2 are formed parallel to each other. The upper surface of the inner resin portion 44A (i.e., the upper surface of the step portion 44A2) has a width in the front-to-rear direction of 40 millimeters or more.

[0042] Next, the operation and effects of this embodiment will be described. In the vehicle seat 10 configured as described above, the back of an occupant seated on the seat cushion 12 is supported by the seatback main body 18 of the seatback 14. The design surface of the shoulder portion on the inner side in the vehicle width direction of the seatback main body 18 is formed by the inner resin portion 44A of the resin part 44. This inner resin portion 44A has holes 46 that open on both sides in the front-to-rear direction. Therefore, when the occupant uses the inner resin portion 44A as a handrail, they can place their fingers in the holes 46.

[0043] Moreover, because the inner resin portion 44A is supported by the frame 20 of the seatback main body 18, rigidity can be ensured when an occupant uses the inner resin portion 44A as a handrail or foothold, thereby improving occupant safety. Furthermore, clamp-type aftermarket parts (e.g., electrical equipment such as a microphone speaker) can be attached to the grip portion 44A1 and step portion 44A2 of the inner resin portion 44A, improving convenience.

[0044] In this embodiment, the hole 46 in the inner resin portion 44A is formed vertically long, making it easier for a rider to hook their fingers when gripping the grip portion 44A1 of the inner resin portion 44A. Furthermore, parts of the left and right surfaces of the grip portion 44A1 are parallel to each other, and parts of the upper and lower surfaces of the step portion 44A2 are parallel to each other. This makes it easier to attach clamp-type aftermarket parts to the grip portion 44A1 or the step portion 44A2.

[0045] In this embodiment, the width of the upper surface of the inner resin part 44A in the front-to-rear direction is set to 40 millimeters or more, making it easy for an occupant to place their feet on the upper surface of the inner resin part 44A when using the inner resin part 44A as a foothold. Furthermore, in this embodiment, the inner resin part 44A is reinforced by the shoulder reinforcing parts 20A of the frame 20 disposed within the inner resin part 44A, making it easier to ensure rigidity when an occupant uses the inner resin part 44A as a handrail or foothold.

[0046] 6, when a vehicle seat 10 configured symmetrically to the above-described vehicle seat 10 is placed on the left side of the cabin, a string-like member S can be fastened to the holes 46 in the left and right seat backs 14. The string-like member S can be used, for example, as a luggage stopper in the rear space of the cabin, as a hanger for drying clothes, or as a curtain during rest in the rear space.

[0047] Next, another embodiment of the present invention will be described. Note that the same reference numerals as in the first embodiment are used for the configurations and operations that are basically the same as those in the first embodiment, and the description thereof will be omitted.

[0048] <Second embodiment> 7 shows a front view of a portion of a vehicle seat according to a second embodiment of the present invention. In this embodiment, the holes 46 of the inner resin part 44A of the seat back 14 are inclined downward as they move toward the left (outside in the left-right direction). The upper surface of the inner resin part 44A is inclined downward as it moves toward the left, but the downward slope becomes steeper above the holes 46. In this inner resin part 44A, the portion above the holes 46 forms a grip part 44A1, and the portion to the right of the holes 46 forms a step part 44A2. The grip part 44A1 is inclined downward as it moves toward the left.

[0049] In this embodiment, the configuration other than that described above is the same as in the first embodiment. In this embodiment, the same effects as in the first embodiment can be obtained. In this embodiment, the grip portion 44A1 is inclined as described above, making it easier for the occupant to grasp the grip portion 44A1.

[0050] <Third embodiment> 8 shows a front view of a portion of a vehicle seat according to a third embodiment of the present invention. In this embodiment, recesses 50 are formed on the front and rear surfaces of the inner resin portion 44A of the seat back 14. These recesses 50 are open on the front and rear surfaces of the inner resin portion 44A. In this embodiment, the configuration other than that described above is the same as in the first embodiment. In this embodiment, basically the same effects as in the first embodiment can be obtained.

[0051] <Fourth embodiment> FIG. 9 is a perspective view of a portion of a vehicle seat according to a fourth embodiment of the present invention. In the inner resin portion 44A of the seat back 14 of this vehicle seat, the front-rear thickness of the grip portion 44A1 is set to be smaller than the front-rear thickness of the step portion 44A2. In this embodiment, the configuration other than that described above is the same as in the first embodiment. In this embodiment, basically the same effects as in the first embodiment can be obtained. Moreover, because of the above configuration, it is possible to achieve both ease of gripping when the occupant grasps the grip portion 44A1 and ease of placing the occupant's feet when using the step portion 44A2 as a foothold.

[0052] <Fifth embodiment> FIG. 10 is a perspective view of a portion of a vehicle seat according to a fifth embodiment of the present invention. In the inner resin portion 44A of the seat back 14 of this vehicle seat, the front-rear thickness of the grip portion 44A1 is set smaller than the front-rear thickness of the step portion 44A2, as in the fourth embodiment. Furthermore, vertically aligned irregularities 52 are formed on the left and right surfaces of the grip portion 44A1. In this embodiment, the configuration other than the above is the same as in the first embodiment. This embodiment also achieves essentially the same effects as the first embodiment. Furthermore, because the irregularities 52 are formed on the grip portion 44A1, the occupant's hands are less likely to slip off the grip portion 44A1 when gripping the grip portion 44A1.

[0053] Sixth Embodiment 11 shows a perspective view of a portion of a vehicle seat according to a sixth embodiment of the present invention. In the inner resin portion 44A of the seat back 14 of this vehicle seat, irregularities 54 aligned in the left-right direction are formed on the upper surface of the step portion 44A2. In this embodiment, the configuration other than that described above is the same as in the first embodiment. In this embodiment, basically the same effects as in the first embodiment can be obtained. Moreover, because the irregularities 54 are formed on the upper surface of the step portion 44A2, when an occupant uses the step portion 44A2 as a foothold, the occupant's feet are less likely to slip on the step portion 44A2.

[0054] Seventh Embodiment FIG. 12 shows a perspective view of a portion of a vehicle seat according to a seventh embodiment of the present invention. The inner resin portion 44A of the seat back 14 of this vehicle seat has a slit 56 formed therein, dividing the inner resin portion 44A into two in the front-rear direction. This embodiment is otherwise similar to the first embodiment. This embodiment also provides essentially the same effects as the first embodiment. Furthermore, since the slit 56 is formed in the inner resin portion 44A, it is possible to achieve both ease of gripping when the occupant grasps the grip portion 44A1 and ease of placing the occupant's foot when using the step portion 44A2 as a foothold. The slit 56 can also be used to insert and hold a smartphone, book, or the like.

[0055] Although the present invention has been described above using several embodiments, the present invention can be practiced with various modifications within the scope of the gist thereof. Furthermore, it goes without saying that the scope of the present invention is not limited to the above-described embodiments. [Explanation of symbols]

[0056] 10 Vehicle seats 12 seat cushions 14 Seat back 18 Seat back body 20 frames 20A Shoulder reinforcement 44 Resin part 44A1 Grip 44A2 Step section 46 holes 50 dent 52 Unevenness 54 Unevenness 56 Slit

Claims

1. a seat back body that supports the back of a vehicle occupant; a resin portion that is made of resin, that constitutes a design surface of the shoulder portion on the inner side in the vehicle width direction of the seat back body, that is supported by a frame of the seat back body, and that has holes or recesses that open on both sides in the front-rear direction of the seat; Seat back with.

2. The seat back according to claim 1 , wherein the hole or recess is formed vertically elongated.

3. 3. The seat back according to claim 1, wherein a part of an outer edge of the resin portion and a part of an edge of the hole are formed parallel to each other.

4. 3. The seat back according to claim 1, wherein the upper surface of the resin portion has a width of 40 millimeters or more in the front-rear direction of the seat.

5. 3. The seat back according to claim 1, wherein the frame has a shoulder reinforcement portion disposed in the resin portion so as to surround the hole or recess when viewed in the seat front-rear direction.

6. A seat back as described in claim 1 or claim 2, wherein the thickness of the grip portion located on the outer side of the hole or recess in the seat's left-right direction is set to be smaller than the thickness of the step portion located on the upper side of the seat in the seat's front-to-rear direction relative to the hole or recess.

7. 3. The seat back according to claim 1, wherein the resin portion has a grip portion located on the outer side of the hole or recess in the seat left-right direction, the grip portion having projections and depressions aligned in the seat up-down direction.

8. 3. The seat back according to claim 1, wherein the resin portion has a step portion on an upper surface thereof positioned above the seat with respect to the hole or recess, the step portion having projections and depressions aligned in the left-right direction of the seat.

9. 3. The seat back according to claim 1, wherein the resin portion is formed with a slit that divides the resin portion into two in the seat front-rear direction.

10. a seat cushion on which a vehicle occupant sits; The seat back according to claim 1 or 2, wherein the seat back main body supports the back of the occupant; A vehicle seat comprising:

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