JP2019202719A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat capable of achieving both stability of a seat back displacement function and sitting comfortability.SOLUTION: A vehicular seat includes a seat cushion, a seat back, a back frame constituting a skeleton of the seat cushion, and a metal movable frame displaceable to the back frame. The seat back has a resin displacement part displaceable to the back frame. The movable frame is supported by the back frame. The displacement part is integrated with the movable frame.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a vehicle seat.

  In a seat disposed on a vehicle such as an automobile, a seat in which a seat cushion and a seat back are displaceable with respect to a frame fixed to the automobile is known in accordance with the posture of a seated person (see Patent Document 1).

  The seat is configured such that the seat back swings about an axis extending in the seat longitudinal direction.

International Publication No. 2013/021497

  In the seat described above, the displacement portion of the seat back needs to be supported so as to be displaceable relative to the back frame. In order to displace the displacement part stably, a support member having high rigidity is required. However, if the rigidity of the displacement part itself is increased, the sitting comfort is lowered.

  An object of one aspect of the present disclosure is to provide a vehicle seat that can achieve both the stability of the displacement function of the seat back and the sitting comfort.

  One aspect of the present disclosure includes a seat cushion (2), a seat back (3), a back frame (5) constituting a skeleton of the seat back (3), and a metal that is displaceable with respect to the back frame (5). And a movable frame (7). The seat back (3) has a resin displacement portion (31) that can be displaced relative to the back frame (5). The movable frame (7) is supported by the back frame (5). The displacement part (31) is integrated with the movable frame (7).

  According to such a configuration, the seating comfort of the seated person can be maintained by configuring the displacement portion (31) that supports the seated person with the resin. On the other hand, by integrating the metal movable frame (7) with the displacement portion (31), the displacement portion (31) can be supported displaceably with respect to the back frame (5). As a result, it is possible to achieve both the stability of the displacement function of the seat back (3) and the sitting comfort.

  In one aspect of the present disclosure, the central portion (7E) in the seat width direction of the movable frame (7) may be separated from the displacement portion (31). The movable frame (7) may be integrated with the displacement portion (31) in a plurality of connection regions (7A, 7B) arranged so as to sandwich the central portion (7E) in the seat width direction. According to such a structure, since the fall of the softness | flexibility in the center part which receives a load of a seated person large among displacement parts (31) can be suppressed, sitting comfort can be improved.

In one aspect of the present disclosure, the movable frame (7) may be integrated with the displacement portion (31) in the plurality of connection regions (7A, 7B, 7C, 7D) that are separated in the vertical direction. According to such a configuration, it is possible to suppress a decrease in flexibility of the displacement portion (31) and to improve the connection strength between the displacement portion (31) and the movable frame (7).

  In one aspect of the present disclosure, the connection region (7A, 7B) with the displacement portion (31) of the movable frame (7) reaches the side surface (31C, 31D) in the sheet width direction of the displacement portion (31). Good. According to such a configuration, the connection strength between the displacement portion (31) and the movable frame (7) can be further increased.

  Note that the reference numerals in the parentheses above are examples showing the correspondence with the specific configurations described in the embodiments described later, and the present disclosure is limited to the specific configurations shown in the reference numerals in the parentheses. It is not something.

1A is a schematic perspective view showing a vehicle seat in the embodiment, and FIG. 1B is a schematic perspective view showing a state in which a part of a seat cushion and a seat back are displaced in the vehicle seat of FIG. 1A. It is. FIG. 2 is a schematic perspective view of a cushion frame and a back frame in the vehicle seat of FIG. 1A. FIG. 3 is a schematic end view of the cut section taken along line III-III in FIG. 1A.

Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
A vehicle seat 1 shown in FIGS. 1A and 1B includes a seat cushion 2 and a seat back 3.

  The vehicle seat 1 of this embodiment is used as a seat for a passenger car. In addition, the direction in the following description and each figure means the direction in the state which assembled | attached the vehicle seat 1 to the vehicle (namely, passenger car). In the present embodiment, the seat width direction matches the left-right direction of the vehicle, and the front of the seat matches the front of the vehicle.

  As shown in FIG. 2, the vehicle seat 1 includes a cushion frame 4 constituting the skeleton of the seat cushion 2, a back frame 5 constituting the skeleton of the seat back 3, a movable pan 6, and a movable frame 7. .

<Seat cushion>
The seat cushion 2 is a part for supporting a seated person's buttocks and the like. As shown in FIGS. 1A and 1B, the seat cushion 2 includes a seat cushion displacement portion 2 </ b> A that can be displaced with respect to the cushion frame 4.

  The seat cushion displacement portion 2A includes the seating surface of the seated person. Further, the seat cushion displacement portion 2A swings about an axis P1 intersecting with the seating surface. The seat cushion displacement portion 2 </ b> A is fixed to a movable pan 6 (see FIG. 2) supported so as to be displaceable with respect to the cushion frame 4.

  The movable pan 6 is provided with a support portion that supports the movable pan 6 so as to be displaceable with respect to the cushion frame 4, a spring that applies an initial load to the movable pan 6, and the like. Accordingly, the seat cushion displacement portion 2A is configured to swing when a load exceeding a predetermined value exceeding the initial load is applied.

<Back frame>
As shown in FIG. 2, the back frame 5 includes a first side frame 51 and a second side frame 52 that extend in the vertical direction and are spaced apart from each other in the seat width direction.

<Seatback>
The seat back 3 is a part for supporting the back of the seated person. As shown in FIGS. 1A and 1B, the seat back 3 includes a seat back displacement portion 31 that can be displaced with respect to the back frame 5, and a seat back fixing portion 32 that is fixed to the back frame 5.

  The seat back displacement portion 31 swings about an axis P2 that intersects the front of the seat back 3 (that is, the surface that supports the back of the seated person). The seat back displacement portion 31 is attached to a movable frame 7 (see FIG. 2) described later. Further, the seat back displacement portion 31 is not fixed to the back frame 5.

  The seat back displacement portion 31 is made of resin. Examples of the resin constituting the seat back displacement portion 31 include elastomers such as polyurethane and polyester elastomer, and resins having elasticity or flexibility such as beaded foamed polypropylene (EPP).

  The seat back displacement portion 31 may have a multilayer structure in which a plurality of material layers are combined. As this multilayer structure, for example, a structure in which a urethane layer is stretched on the surface of the elastomer layer on the seated side is exemplified. The seat back 3 may further include a cover that covers the seat back displacement portion 31. This cover is, for example, natural leather, synthetic leather, fabric or the like.

  As shown in FIGS. 1A and 1B, the seat back fixing portion 32 is disposed behind the seat back displacement portion 31, and on the left and right sides and below the seat back displacement portion 31. The seat back fixing portion 32 is made of, for example, resin, metal, or the like.

  The seat back fixing portion 32 has a frame portion 33 disposed on the left and right sides and the rear side of the seat back displacement portion 31. The frame portion 33 includes a plate-like first side portion 32A, a plate-like second side portion 32B, a plate-like upper portion 32C, a plate-like first shield portion 32D, and a plate-like second shield portion 32E. And a plate-like back portion 32F (see FIG. 3).

  The first side portion 32A is disposed on the outer side (that is, the right side) in the seat width direction of the first side frame 51 and the seat back displacement portion 31 so as to face the first side frame 51. The first side portion 32A extends in the up-down direction.

  The second side portion 32B is disposed on the outer side (that is, the left side) in the seat width direction of the second side frame 52 and the seat back displacement portion 31 so as to face the second side frame 52. The second side portion 32B extends in the vertical direction.

  The upper portion 32C is disposed above the back frame 5 and the seat back displacement portion 31 so as to cover the back frame 5, and extends in the seat width direction. The upper part 32C connects the first side part 32A and the second side part 32B.

  As shown in FIG. 3, the first shield part 32 </ b> D is disposed in front of the first side frame 51 and extends from the first side part 32 </ b> A to the rear of the seat back displacement part 31. The second shield part 32 </ b> E is disposed in front of the second side frame 52 and extends from the second side part 32 </ b> B to the rear of the seat back displacement part 31. The first shield part 32D and the second shield part 32E are separated from each other in the sheet width direction.

  The back portion 32F is disposed behind the back frame 5 and extends in the vertical direction and the seat width direction. The back portion 32F is connected to the first side portion 32A, the second side portion 32B, and the upper portion 32C.

<Movable frame>
As shown in FIG. 2, the movable frame 7 is a metal plate-like frame that can be displaced with respect to the back frame 5. The movable frame 7 is disposed between the seat back displacement portion 31 and the back frame 5.

  The movable frame 7 is attached with a movable mechanism 8 having a support portion that supports the movable frame 7 so as to be displaceable with respect to the back frame 5 and a spring that applies an initial load to the movable frame 7. Therefore, the seat back displacement portion 31 is configured to swing when a load exceeding a predetermined value exceeding the initial load is applied. The movable frame 7 is supported by the back frame 5 via the movable mechanism 8.

  The movable frame 7 has a first connection region 7A, a second connection region 7B, a third connection region 7C, and a fourth connection in which the seat back displacement unit 31 is integrated on the plate surface on the side facing the seat back displacement unit 31. It has area 7D. That is, the seat back displacement portion 31 is integrated with the movable frame 7 on at least a part of the surface (that is, the back surface) 31 </ b> A on the side facing the back frame 5.

  The first connection region 7 </ b> A is provided at the upper left portion of the movable frame 7. The second connection region 7B is provided at a position symmetrical to the first connection region 7A, that is, at the upper right portion of the movable frame 7.

  The third connection region 7C is provided apart from the first connection region 7A in the vertical direction. The fourth connection region 7D is provided in a position symmetrical to the third connection region 7C, that is, spaced apart from the second connection region 7B in the vertical direction.

  As shown in FIG. 3, the first connection region 7 </ b> A and the second connection region 7 </ b> B each include an end portion in the seat width direction of the seat back displacement portion 31. That is, the first connection region 7A and the second connection region 7B reach the right side surface 31B and the left side surface 31C of the seat back displacement portion 31, respectively.

  Further, the center portion 7E in the seat width direction of the movable frame 7 (that is, the portion sandwiched in the seat width direction by the first connection region 7A and the second connection region 7B) protrudes rearward of the seat, thereby It is separated from the displacement part 31. Therefore, a gap is formed between the movable frame 7 and the seat back displacement portion 31 in the center of the seat back 3 in the seat width direction.

  The first connection area 7A and the second connection area 7B of the movable frame 7 are opposed to the first shield part 32D and the second shield part 32E of the seat back fixing part 32, respectively. Further, the first connection region 7A and the second connection region 7B are provided at a position at least partially overlapping with the first side frame 51 or the second side frame 52 in the seat front-rear direction.

  In the present embodiment, the first connection region 7A and the second connection region 7B are provided across two strip-shaped panels extending in the vertical direction (see FIG. 2). Therefore, the first connection region 7A and the second connection region 7B are separated into two parts arranged in the sheet width direction by the gap S1 between the two panels.

  In addition, the central portion 7E of the movable frame 7 is divided into a plurality of portions that are separated in the vertical direction. The movable mechanism 8 is attached to a portion disposed below the center portion 7E.

  The movable frame 7 and the seat back displacement portion 31 are integrated by, for example, insert molding. In the present embodiment, the movable frame 7 is surface-connected to the back surface 31 </ b> A of the seat back displacement portion 31 and is exposed behind the seat back displacement portion 31. However, the movable frame 7 may be embedded in the seat back displacement portion 31.

  Of the movable frame 7, the region between the first connection region 7A and the third connection region 7C and the region between the second connection region 7B and the fourth connection region 7D shown in FIG. It may be in contact with the part 31 or may be separated. In the present embodiment, the region between the first connection region 7A and the third connection region 7C and the region between the second connection region 7B and the fourth connection region 7D are in contact with the seat back displacement portion 31. Although not integrated with the seat back displacement portion 31.

[1-2. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) By configuring the seat back displacement portion 31 that supports the seated person with resin, the seating comfort of the seated person can be maintained. On the other hand, by integrating the metal movable frame 7 into the seat back displacement portion 31, the seat back displacement portion 31 can be supported so as to be displaceable with respect to the back frame 5 easily and reliably. As a result, both the stability of the displacement function of the seat back 3 and the sitting comfort can be achieved.

  (1b) Since the movable frame 7 is separated from the seat back displacement portion 31 in the central portion 7E in the seat width direction, the flexibility of the central portion of the seat back displacement portion 31 that receives a large load on the seated person is reduced. Can be suppressed. As a result, sitting comfort can be enhanced.

  (1c) Since the movable frame 7 is integrated with the seat back displacement portion 31 at a plurality of connection regions 7A, 7B, 7C, and 7D separated in the vertical direction, the reduction in flexibility of the seat back displacement portion 31 is suppressed. Further, the connection strength between the seat back displacement portion 31 and the movable frame 7 can be improved.

  (1d) Since the first connection region 7A and the second connection region 7B reach the right side surface 31B and the left side surface 31C of the seat back displacement portion 31, the connection strength between the seat back displacement portion 31 and the movable frame 7 is increased. It can be further increased.

[2. Other Embodiments]
As mentioned above, although embodiment of this indication was described, it cannot be overemphasized that this indication can take various forms, without being limited to the above-mentioned embodiment.

  (2a) In the vehicle seat 1 of the above embodiment, the movable frame 7 may be in contact with the seat back displacement portion 31 or integrated with the seat back displacement portion 31 at the center portion 7E in the seat width direction. It may be.

(2b) In the vehicle seat 1 according to the above-described embodiment, the movable frame 7 does not necessarily have to be integrated with the seat back displacement portion 31 at a plurality of connection regions that are vertically separated. That is, the movable frame 7 may be integrated with the seat back displacement portion 31 in one connection region on the left and right. Further, the movable frame 7 has a seat back displacement portion 31 over the entire vertical direction.
And may be integrated.

  (2c) In the vehicle seat 1 of the above-described embodiment, the connection regions 7A and 7B do not necessarily reach the side surfaces 31B and 31C in the seat width direction of the seat back displacement portion 31. That is, the connection regions 7A and 7B may be inside the end portion in the seat width direction of the seat back displacement portion 31.

  (2d) The vehicle seat 1 of the above-described embodiment can be applied to a seat used for a vehicle such as a railway vehicle other than an automobile, a ship, and an aircraft, in addition to the seat used for the automobile described above.

  (2e) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Seat cushion, 2A ... Seat cushion displacement part,
3 ... seat back, 4 ... cushion frame, 5 ... back frame, 6 ... movable pan,
7 ... movable frame, 7A, 7B, 7C, 7D ... connection region, 7E ... central part,
8 ... movable mechanism, 31 ... seat back displacement part, 31A ... back surface, 31B ... right side surface,
31C ... left side, 32 ... seat back fixing part, 32A, 32B ... side part,
32C ... upper part, 32D, 32E ... shield part, 32F ... back part,
51 ... 1st side frame, 52 ... 2nd side frame.

Claims (4)

A vehicle seat comprising a seat cushion, a seat back, a back frame constituting a skeleton of the seat back, and a metal movable frame displaceable with respect to the back frame,
The seat back has a resin-made displacement portion that can be displaced with respect to the back frame,
The movable frame is supported by the back frame,
The displacement part is a vehicle seat integrated with the movable frame. The vehicle seat according to claim 1,
The central part of the movable frame in the seat width direction is separated from the displacement part,
The movable frame is a vehicle seat integrated with the displacement portion in a plurality of connection regions arranged so as to sandwich the central portion in the seat width direction. The vehicle seat according to claim 1 or 2,
The movable frame is a vehicle seat integrated with the displacement portion in a plurality of connection regions spaced apart in the vertical direction. The vehicle seat according to any one of claims 1 to 3,
A vehicle seat, wherein a connection region of the movable frame with the displacement portion reaches a side surface in the seat width direction of the displacement portion.