Vehicle seats

Abstract

To provide a vehicular seat configured to enable an extendable ottoman to absorb an extra length of a wire harness.SOLUTION: A vehicular seat is provided with an ottoman. The ottoman has: a main body that oscillates between a storage position and an expansion position; an extension part slidably mounted on the main body; and an adjustment part that adjusts an extra length of a wire harness. The adjustment part has a case fixed to the main body, and a guide that holds the wire harness and slides with respect to the case. The case has a guide insertion path through which the guide is inserted. The guide insertion path has a lower surface, an upper surface, and a feeding-out port through which the guide is fed out to the outside of the case. A distance between the lower surface and the upper surface gradually becomes larger toward the feeding-out port.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to vehicle seats. [Background technology]

[0002] The excess length of a wire harness arranged in a vehicle seat for the purposes of power supply and communication changes in accordance with the movement and deformation of the vehicle seat. For this reason, an excess length absorption device has been devised that absorbs the excess length of the wire harness by reciprocating (i.e., sliding) a protector that holds the wire harness (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-84643 Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle seat equipped with an ottoman that extends partially forward of the seat, the front end of the ottoman bends downward due to the weight of the occupant's legs. Therefore, if a wire harness and the above-mentioned sliding type slack absorber are provided at the front end of the ottoman, this bending may cause deformation of the protector that holds the wire harness. As a result, there is a risk that the slack absorber's ability to slide to absorb the wire harness may be hindered.

[0005] An object of one aspect of the present disclosure is to provide a vehicle seat in which an extendable ottoman can accommodate excess length of a wire harness. [Means for solving the problem]

[0006] One aspect of the present disclosure is a vehicle seat (1) including a seat cushion (2) and an ottoman (4). The ottoman (4) has a main body (41) configured to swing between a stored position stored under the seat cushion (2) and an extended position extended in front of the seat of the seat cushion (2), an extension part (42) slidably attached to the main body (41), a wire harness (43) arranged across the main body (41) and the extension part (42), and an adjustment part (44) configured to adjust the slack of the wire harness (43).

[0007] The adjustment part (44) includes a case (441) fixed to the main body (41) and configured to feed or retrieve the wire harness (43) in accordance with the sliding of the extension part (42), and a guide (442) configured to hold the wire harness (43) and to slide relative to the case (441) together with the wire harness (43). The case (441) has a guide insertion passage (441A) through which the guide (442) is inserted in the sliding direction.

[0008] The guide insertion passage 441A has a lower surface 4411 that contacts the guide 442 from below when the main body 41 is in the unfolded position, an upper surface 4412 that overlaps the guide 442 from above when the main body 41 is in the unfolded position, and a feed opening 4413 that feeds the guide 442 out of the case 441. The distance between the lower surface 4411 and the upper surface 4412 in a direction perpendicular to both the sliding direction of the guide 442 and the sheet width direction increases toward the feed opening 4413.

[0009] With this configuration, the distance between the lower surface (4411) and the upper surface (4412) in the guide insertion passage (441A) increases toward the delivery opening (4413), thereby reducing the sliding resistance between the guide (442) and the lower surface (4411) when the extension portion (42) bends downward due to the load of the legs of a seated person.

[0010] As a result, when the extension portion (42) slides toward the rear of the seat with the legs of a seated person placed on it, the wire harness (43) is pulled into the case (441) together with the guide (442). As a result, the excess length of the wire harness (43) can be smoothly absorbed when the ottoman (4) is contracted.

[0011] In one aspect of the present disclosure, the guide (442) may be fixed to the extension portion (42). Such a configuration can stabilize the sliding of the guide (442) relative to the guide insertion passage (441A) as the extension portion (42) slides.

[0012] In one aspect of the present disclosure, the adjustment portion (44) may include a recess (4422) provided in either the guide (442) or the guide insertion passage (441A) and extending in the sliding direction of the guide (442), and a protrusion (4414) provided in the other of the guide (442) or the guide insertion passage (441A) and inserted into the recess (4422). With this configuration, the sliding direction of the guide (442) is stabilized, thereby reducing sliding resistance.

[0013] In one aspect of the present disclosure, the recessed portion (4422) may be provided in the guide (442). The protruding portion (4414) may be provided in the guide insertion passage (441A). With this configuration, the recessed portion (4422) functions as a rib, thereby improving the strength of the guide (442).

[0014] In one aspect of the present disclosure, the case (441) may have a housing portion (441B) that houses the wire harness (43) and a harness fixing portion (441D) that fixes the wire harness (43) outside the housing portion (441B). An intermediate portion (433) of the wire harness (43) between the first portion (431) fixed to the harness fixing portion (441D) and the second portion (432) held by the guide (442) may be housed in the housing portion (441B). This configuration stabilizes bending of the wire harness (43) inside the case (441) when the ottoman (4) is contracted. Furthermore, the number of parts required to fix the wire harness (43) can be reduced.

[0015] Note that the symbols in the parentheses above are examples showing the correspondence with the specific configurations, etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations, etc. shown by the symbols in the parentheses above. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic side view showing a vehicle seat according to an embodiment. [Figure 2] 2A and 2B are schematic side views showing the vehicle seat of FIG. 1 in use with an ottoman. [Figure 3] FIG. 3 is a schematic perspective view of an ottoman in the vehicle seat of FIG. [Figure 4] FIG. 4 is a schematic perspective view of the ottoman of FIG. [Figure 5] 5A is a schematic perspective view of an adjustment portion of the ottoman of FIG. 4, and FIG. 5B is a schematic cross-sectional view taken along line VB-VB of FIG. 5A. [Figure 6] 6 is a schematic perspective view of a base that constitutes a case in the adjustment unit of FIG. [Figure 7] 7A is a schematic plan view showing the adjustment portion of FIG. 4 when the extension portion is in a first position, and FIG. 7B is a schematic plan view showing the adjustment portion of FIG. 4 when the extension portion is in a second position. [Figure 8] 8A and 8B are schematic perspective views of a guide in the adjustment section of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1.Configuration] The vehicle seat 1 shown in FIG. 1 includes a seat cushion 2, a seat back 3, and an ottoman 4.

[0018] The vehicle seat 1 is used as a seat for a passenger vehicle. Note that the directions in the following description and in each drawing refer to directions when the vehicle seat 1 is assembled to the vehicle (i.e., the passenger vehicle). In this embodiment, the width direction of the seat coincides with the left-right direction of the vehicle, and the front of the seat coincides with the front of the vehicle.

[0019] The seat cushion 2 is a part for supporting the buttocks of a seated person. The seat back 3 is a part for supporting the back of the seated person. The ottoman 4 is a part for supporting the legs of the seated person.

[0020] <Ottoman> The ottoman 4 can be moved between an unused state (see FIG. 1) in which a pad that supports the legs of a seated person is positioned below the seat cushion 2, and an used state (see FIGS. 2A and 2B) in which the pad is deployed in front of the seat cushion 2. The ottoman 4 has a main body 41 and an extension 42.

[0021] <Main body> The main body 41 is configured to swing between a stored position stored below the seat cushion 2 shown in Figure 1 and an deployed position deployed in front of the seat cushion 2 shown in Figures 2A and 2B.

[0022] The main body 41 is connected to, for example, a cushion frame (not shown) that supports the seat cushion 2 so as to be swingable in the up and down direction. The swing center axis of the main body 41 is parallel to the seat width direction.

[0023] <Extension part> The extension 42 is a portion having a pad that supports the legs of a seated person. The extension 42 is attached to the main body 41 so as to be able to slide. The ottoman 4 expands and contracts as the extension 42 slides.

[0024] Specifically, when the main body 41 is in the deployed position, the extension portion 42 is configured to slide in the fore-and-aft direction of the seat between a first position relative to the main body 41 shown in FIG. 2A and a second position relative to the main body 41 shown in FIG. 2B.

[0025] The second position is a position further forward than the first position. When the main body 41 is in the storage position, the extension 42 is in the first position. Furthermore, the extension 42 does not slide from the first position when the main body 41 is not in the deployed position.

[0026] As shown in Fig. 3, when the main body 41 is in the deployed position, the extension 42 is disposed above the main body 41. Note that Fig. 3 shows the state in which the extension 42 is in the first position, and the pads that the extension 42 has are not shown.

[0027] As shown in Fig. 4, the ottoman 4 further includes a wire harness 43 and an adjustment unit 44. Note that the cover 41A (see Fig. 3) of the main body 41 is not shown in Fig. 4. The drive mechanism disposed inside the main body 41 is also not shown. The drive mechanism is made up of an actuator, a link, a gear, etc. for driving (i.e., swinging or sliding) the main body 41 and the extension unit 42.

[0028] <Wire harness> The wire harness 43 is disposed across the main body 41 and the extension 42. The wire harness 43 electrically connects, for example, a power source and a control device of the vehicle to electrical components 5 (see FIG. 3) attached to the extension 42. An example of the electrical components 5 is a heater that heats the pad of the extension 42.

[0029] <Adjustment part> 5A and 5B is configured to accommodate the wire harness 43 therein, thereby adjusting (i.e., absorbing) the excess length of the wire harness 43. The wire harness 43 is inserted through the adjustment portion 44. The adjustment portion 44 has a case 441 and a guide 442.

[0030] <Case> The case 441 is fixed to the main body 41 and configured to feed or retrieve the wire harness 43 in accordance with the sliding of the extension portion 42.

[0031] 5A, case 441 is formed of, for example, resin. As shown in FIG. 5A, case 441 is configured by connecting base 44A and cover 44B that is placed on base 44A. Case 441 has guide passage 441A, accommodating portion 441B, harness insertion opening 441C, and harness fixing portion 441D.

[0032] The guide insertion passage 441A is a cylindrical portion through which the guide 442 is inserted in the sliding direction together with the wire harness 43. The inside of the guide insertion passage 441A communicates with the inside of the accommodating portion 441B. In this embodiment, the sliding direction of the guide 442 is inclined with respect to the horizontal direction.

[0033] As shown in Fig. 5B, the guide insertion passage 441A has a lower surface 4411, an upper surface 4412, a delivery opening 4413, and a convex portion 4414 (see Fig. 6). Note that the guide 442 is not shown in Fig. 5B.

[0034] The lower surface 4411 is an inner surface that overlaps the guide 442 from below when the main body 41 is in the unfolded position and is in contact with the guide 442. The upper surface 4412 is an inner surface that overlaps the guide 442 from above when the main body 41 is in the unfolded position.

[0035] The lower surface 4411 and the upper surface 4412 face each other in a direction perpendicular to both the sliding direction of the guide 442 and the sheet width direction (i.e., the height direction of the guide insertion passage 441A). The lower surface 4411 and the upper surface 4412 are each flat surfaces that are parallel to the sheet width direction and extend in the front-rear direction of the sheet. The lower surface 4411 is inclined with respect to the upper surface 4412.

[0036] The outlet 4413 is an opening for sending the guide 442 out of the case 441 when the extension 42 is deployed (i.e., when the extension 42 is slid forward of the seat). The guide 442 is taken into the case 441 through the outlet 4413 when the extension 42 is retrieved (i.e., when the extension 42 is slid backward of the seat).

[0037] A distance D between the lower surface 4411 and the upper surface 4412 in the height direction of the guide insertion passage 441A increases from the accommodation section 441B toward the outlet 4413. Specifically, the lower surface 4411 and the upper surface 4412 are inclined so that the end closer to the outlet 4413 is lower than the opposite end when the main body 41 is in the deployed position. Furthermore, the inclination angle of the lower surface 4411 with respect to the horizontal direction is larger than the inclination angle of the upper surface 4412.

[0038] Note that bottom surface 4411 does not have to be flat as long as distance D increases from storage section 441B toward outlet 4413. In other words, bottom surface 4411 may be a curved or bent surface.

[0039] 6, the convex portion 4414 is provided in a portion of the base 44A of the case 441 that constitutes the guide insertion passage 441A. The convex portion 4414 is a convex strip that extends in the sliding direction of the guide 442. The convex portion 4414 protrudes from a lower surface 4411 of the guide insertion passage 441A toward an upper surface 4412.

[0040] 7A and 7B, the housing portion 441B is a portion that houses the wire harness 43 in a bent (i.e., deflected) state. The intermediate portion 433 of the wire harness 43 housed in the housing portion 441B expands and contracts within the housing portion 441B in accordance with the sliding of the guide 442. Note that FIGS. 7A and 7B show a state in which the base 44A of the case 441 is removed.

[0041] The harness insertion opening 441C is an opening through which the wire harness 43 is inserted. The harness insertion opening 441C communicates the accommodating portion 441B (that is, the inside of the case 441) with the outside of the case 441.

[0042] 5A is a plate-shaped portion that fixes the wire harness 43 outside the accommodating portion 441B. The harness fixing portion 441D protrudes from the outer surface of the base 44A of the case 441. The harness fixing portion 441D is located below the harness insertion opening 441C when the main body 41 is in the deployed position.

[0043] The first portion 431 of the wire harness 43 is fixed to the harness fixing portion 441D by, for example, a cable tie. The intermediate portion 433 of the wire harness 43 between the first portion 431 and the second portion 432 (see FIG. 8A) held by the guide 442 is housed in the housing portion 441B as described above (see FIG. 7A). The harness fixing portion 441D, together with the guide 442, determines the length of the intermediate portion 433 of the wire harness 43.

[0044] <Guide> The guide 442 is a long part configured to hold the wire harness 43 and to slide together with the wire harness 43 relative to the case 441 .

[0045] The guide 442 slides in the front-rear direction of the seat together with the extension 42. The guide 442 is made of, for example, resin. As shown in Figures 8A and 8B, the guide 442 has a harness holding portion 442A and a clamp portion 442B.

[0046] The harness holding portion 442A is a sleeve provided with a slit into which the wire harness 43 is inserted in the radial direction. The longitudinal direction of the harness holding portion 442A is parallel to the sliding direction of the guide 442.

[0047] The harness holding portion 442A is inserted into the guide insertion passage 441A of the case 441. The harness holding portion 442A has a bottom wall 4421 that slides on a lower surface 4411 of the guide insertion passage 441A, and a recess 4422 provided in the bottom wall 4421.

[0048] The recess 4422 is a groove into which the protrusion 4414 of the guide insertion passage 441A is inserted. The recess 4422 extends along the sliding direction of the guide 442. The recess 4422 constitutes a part of the rib of the bottom wall 4421.

[0049] The clamp portion 442B is a portion fixed to the extension portion 42. The clamp portion 442B is fixed to the extension portion 42 by a fastener such as a resin clip inserted into an insertion hole 4423. The insertion hole 4423 is an elongated hole whose diameter in the sheet width direction is larger than its diameter in a direction perpendicular to the sheet width direction. Therefore, it is possible to absorb dimensional variations in the sheet width direction between the clamp portion 442B and the extension portion 42.

[0050] The clamp portion 442B is connected to the end portion of the harness holding portion 442A in front of the seat. The wire harness 43 is fixed to the clamp portion 442B by, for example, a cable tie.

[0051] When the extension portion 42 (see FIG. 2A) in the first position slides toward the front of the seat, the clamp portion 442B fixed to the extension portion 42 moves toward the front of the seat together with the extension portion 42. As a result, the adjustment portion 44 changes from a state in which the harness holding portion 442A is housed in the guide insertion passage 441A shown in FIG. 7A to a state in which the harness holding portion 442A is pulled out of the guide insertion passage 441A shown in FIG. 7B. This causes the second portion 432 of the wire harness 43 held by the guide 442 to be fed out of the case 441.

[0052] On the other hand, when the extension 42 (see FIG. 2B) in the second position slides toward the rear of the seat, the clamp 442B fixed to the extension 42 moves toward the rear of the seat together with the extension 42. As a result, the adjustment unit 44 changes from the state shown in FIG. 7B to the state shown in FIG. 7A. As a result, the second part 432 held by the guide 442 is collected into the case 441.

[0053] [1-2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) In the guide passage 441A, the distance between the lower surface 4411 and the upper surface 4412 increases toward the outlet 4413, thereby reducing the sliding resistance between the guide 442 and the lower surface 4411 when the extension portion 42 bends downward due to the load of the legs of the seated person.

[0054] As a result, when the extension 42 slides toward the rear of the seat with the legs of a seated person placed on it, the wire harness 43 is pulled into the case 441 together with the guide 442. As a result, the excess length of the wire harness 43 can be smoothly absorbed when the ottoman 4 is contracted.

[0055] (1b) By fixing the guide 442 to the extension portion 42, the sliding of the guide 442 relative to the guide insertion passage 441A caused by the sliding of the extension portion 42 can be stabilized.

[0056] (1c) The sliding direction of the guide 442 is stabilized by the convex portion 4414 and the concave portion 4422, so that sliding resistance can be reduced. (1d) The recesses 4422 function as ribs, thereby improving the strength of the guide 442.

[0057] (1e) Providing the harness fixing portion 441D in the case 441 stabilizes bending of the wire harness 43 inside the case 441 when the ottoman 4 is contracted. Also, the number of parts for fixing the wire harness 43 can be reduced.

[0058] 2. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0059] (2a) In the vehicle seat of the above embodiment, if the guide can slide together with the extension portion by the wire harness fixed to the extension portion, the guide does not necessarily have to be fixed to the extension portion.

[0060] (2b) In the vehicle seat of the above embodiment, the recess may be provided in the guide insertion passage and the protrusion may be provided on the guide. Also, the adjustment portion does not necessarily have to have the recess and the protrusion.

[0061] (2c) In the vehicle seat of the above embodiment, the portion of the adjustment portion of the wire harness outside the harness insertion opening may be fixed to the main body of the ottoman. Also, the case does not necessarily have to have a harness fixing portion.

[0062] (2d) The vehicle seat of the above embodiment can also be applied to seats used in automobiles other than passenger cars, and seats used in vehicles other than automobiles, such as railway cars, ships, and aircraft.

[0063] (2e) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified by the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0064] 1...vehicle seat, 2...seat cushion, 3...seat back, 4...ottoman, 5...electrical components, 41...main body, 41A...cover, 42...extension part, 43... Wire harness, 44... Adjustment part, 44A... Base, 44B... Cover, 431...first part, 432...second part, 433...intermediate part, 441...case, 441A... guide passage, 441B... accommodation section, 441C... harness insertion port, 441D...Harness fixing portion, 442...Guide, 442A...Harness holding portion, 42B... clamp portion, 4411... lower surface, 4412... upper surface, 4413... delivery port, 4414...protrusion, 4421...bottom wall, 4422...recess, 4423...insertion hole.

Claims

1. Seat cushion and With an ottoman, Equipped with The ottoman is a main body configured to swing between a stored position where the main body is stored under the seat cushion and a deployed position where the main body is deployed in front of the seat; an extension slidably attached to the body; a wire harness disposed across the main body and the extension; an adjustment unit configured to adjust an excess length of the wire harness; and The adjustment unit a case fixed to the main body and configured to feed or retrieve the wire harness in accordance with sliding of the extension portion; a guide fixed to the extension portion, configured to hold the wire harness and to slide relative to the case together with the wire harness; and the case has a guide insertion passage through which the guide is inserted in the sliding direction, The guide insertion passage is a lower surface that contacts the guide from below when the main body is in the deployed position; an upper surface that overlaps the guide from above when the main body is in the deployed position; a delivery port for delivering the guide to the outside of the case; and The vehicle seat, wherein the distance between the lower surface and the upper surface in a direction perpendicular to both the sliding direction of the guide and the seat width direction increases toward the delivery opening.

2. Seat cushion and With an ottoman, Equipped with The ottoman is a main body configured to swing between a stored position where the main body is stored under the seat cushion and a deployed position where the main body is deployed in front of the seat; an extension slidably attached to the body; a wire harness disposed across the main body and the extension; an adjustment unit configured to adjust an excess length of the wire harness; and The adjustment unit a case fixed to the main body and configured to feed or retrieve the wire harness in accordance with sliding of the extension portion; a guide configured to hold the wire harness and to slide together with the wire harness relative to the case; and the case has a guide insertion passage through which the guide is inserted in the sliding direction, The guide insertion passage is a lower surface that contacts the guide from below when the main body is in the deployed position; an upper surface that overlaps the guide from above when the main body is in the deployed position; a delivery port for delivering the guide to the outside of the case; and The adjustment unit a recess provided in either the guide or the guide insertion passage and extending in a sliding direction of the guide; a protrusion provided on the other of the guide and the guide insertion passage and inserted into the recess; and The vehicle seat, wherein the distance between the lower surface and the upper surface in a direction perpendicular to both the sliding direction of the guide and the seat width direction increases toward the delivery opening.

3. 3. The vehicle seat according to claim 2, The recess is provided in the guide, The vehicle seat, wherein the protrusion is provided in the guide insertion passage.

4. Seat cushion and With an ottoman, Equipped with The ottoman is a main body configured to swing between a stored position where the main body is stored under the seat cushion and a deployed position where the main body is deployed in front of the seat; an extension slidably attached to the body; a wire harness disposed across the main body and the extension; an adjustment unit configured to adjust an excess length of the wire harness; and The adjustment unit a case fixed to the main body and configured to feed or retrieve the wire harness in accordance with sliding of the extension portion; a guide configured to hold the wire harness and to slide together with the wire harness relative to the case; and The case is a guide insertion passage through which the guide is inserted in a sliding direction; a housing portion that houses the wire harness; a harness fixing portion that fixes the wire harness outside the housing portion; and The guide insertion passage is a lower surface that contacts the guide from below when the main body is in the deployed position; an upper surface that overlaps the guide from above when the main body is in the deployed position; a delivery port for delivering the guide to the outside of the case; and a distance between the lower surface and the upper surface in a direction perpendicular to both the slide direction of the guide and the sheet width direction increases toward the delivery port, an intermediate portion of the wire harness between a first portion fixed to the harness fixing portion and a second portion held by the guide is accommodated in the accommodating portion; The guide is a harness holding portion which is a sleeve provided with a slit into which the wire harness is radially inserted; a clamp portion connected to an end portion of the harness holding portion in front of the seat and fixed to the extension portion; A vehicle seat having:

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