JP2020097343A - Vehicle sheet - Google Patents

Abstract

To provide a vehicle sheet capable of reducing restriction of a displacement amount of displacement input means by a skin.SOLUTION: A vehicle sheet includes: a skin covering a pad mounted on a back frame; and displacement input means which displaces the pad between a position in close contact with the back frame in its thickness direction and a position separated from the back frame. The pad and the skin have a slit extending in a sheet width direction above a position corresponding to the displacement input means, and a slit extending in a vertical direction on the right and left of the position corresponding to the displacement input means. The end of the skin at the position corresponding to the displacement input means in the skin is engaged with an expansion/contraction member through the slit.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a vehicle seat, and is applicable to, for example, a vehicle seat including a lumbar support mechanism.

2. Description of the Related Art Some vehicle seats mounted on automobiles include a lumbar support mechanism that supports a lumbar region of a seated person in a seat back. The lumbar support mechanism is a device that changes the tension and shape of the waist portion of the seat back, and is covered with the seat back pad and the skin (for example, Japanese Patent Laid-Open No. 2017-218025 (Patent Document 1)).
Japanese Unexamined Patent Application Publication No. 2018-103655 (Patent Document 2) describes a covering structure of the epidermis in which partial relative movement by the massage device is not obstructed as much as possible.

JP, 2017-218025, A JP, 2008-103655, A

When using a mechanism that gives a large displacement (a degree to which the posture can be changed) that exceeds the range of partial movement of the pad, rather than partial movement of the pad, such as a massage device, May not be able to give a sufficient amount of displacement.
An object of the present disclosure is to provide a vehicle seat that can reduce the limitation of the displacement amount of the displacement input means by the skin.
Other problems and novel features will be apparent from the description of the present specification and the accompanying drawings.

A brief description of a typical one of the present disclosure is as follows.
That is, the vehicle seat includes a skin that covers a pad attached to a back frame, and a displacement input that displaces the pad between a position close to the back frame and a position separated from the back frame in a thickness direction thereof. And means. The pad and the skin have slits extending in the seat width direction above the position corresponding to the displacement input means, and slits extending vertically to the left and right of the position corresponding to the displacement input means. .. An end portion of the outer skin at a position corresponding to the displacement input means of the outer skin is locked by the elastic member via the slit.

According to the vehicle seat, it is possible to reduce the limitation on the displacement amount of the displacement input means due to the skin.

It is a perspective view showing a vehicle seat concerning an embodiment. FIG. 2 is a perspective view showing a cushion frame and a back frame that are the skeletal structure of the vehicle seat of FIG. 1. It is a figure which shows the state which looked at the cushion frame and back frame of FIG. 2 from back. It is a front view which shows the seat back of the vehicle seat of FIG. It is the sectional view on the AA line of FIG. It is a figure explaining the engaging part of FIG. It is the BB sectional view taken on the line of FIG. FIG. 8 is an enlarged view of a portion indicated by a dashed line D in FIG. 7. It is a figure explaining operation|movement of the principal part of a lumbar support apparatus.

Hereinafter, embodiments will be described with reference to the drawings. However, in the following description, the same components may be assigned the same reference numerals and repeated description may be omitted. In addition, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part as compared with the actual mode, but this is merely an example, and the interpretation of the present invention will be understood. It is not limited.

(Vehicle seat)
The vehicle seat according to the embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a vehicle seat according to an embodiment. FIG. 2 is a perspective view showing a cushion frame and a back frame that are the skeletal structure of the vehicle seat of FIG. FIG. 3 is a view showing a state where the cushion frame and the back frame of FIG. 2 are viewed from the rear.
The vehicle seat 1 shown here is, for example, one of a plurality of seats installed inside an automobile, which is one type of vehicle. In the following description, the vertical direction is defined as the vertical direction (UP, DW) with reference to the case where the vehicle on which the vehicle seat 1 is mounted is placed on a horizontal plane. Further, the front-rear direction (FR, RR) is defined to match the front-rear direction of the vehicle, and the left-right direction (width direction) is defined to match the width direction of the vehicle. FR is the front direction of the vehicle, and RR is the rear direction of the vehicle. Further, the vehicle seat 1 will be described by being referred to as a right side (RH) and a left side (LH) when viewed from the rear of the vehicle.

As shown in FIG. 1, a vehicle seat 1 includes a seat cushion 2 that receives the buttocks of a seated person, a seat back 3 that receives the back of the seated person, and a headrest 4 that receives the head of the seated person. There is. The seat cushion 2 is fixed to the floor of the vehicle at the base member 5. Although three base members 5 are shown in FIG. 1 provided at the three corners of the seat cushion 2, in reality, they are also provided at the remaining one corner of the seat cushion 2.

In this embodiment, the headrest 4 has columns 7a and 7b. The headrest 4 is attached to the seat back 3 by inserting the columns 7 a and 7 b into the holes 6 a and 6 b provided in the upper portion of the seat back 3. The headrest 4 is vertically movable on the upper surface of the seat back 3. The headrest 4 can also be removed from the seat back 3. Instead of such a configuration, the headrest 4 may be provided integrally with the seat back 3. Such a structure may be referred to as a headrest integrated seat back or a headrest integrated vehicle seat.

In FIG. 1, a cushion frame 21 having a skeletal structure is provided inside the seat cushion 2. Inside the seat back 3, a back frame 31 having a skeleton structure is provided. As shown in FIG. 2, the cushion frame 21 and the back frame 31 are connected by a reclining mechanism (not shown). The back frame 31 can be tilted with respect to the cushion frame 21 by the function of the reclining mechanism.

As shown in FIG. 2, the cushion frame 21 includes a square frame-shaped steel frame main body 21a in plan view and a connecting member 21b that connects the rear portion of the frame main body 21a. Three steel springs 22 are bridged between the front portion of the frame body 21a and the connecting member 21b. The cushion frame 21 supports the periphery of the pad 40 (see FIG. 1) from below by the frame body 21a, and supports the center of the pad 40 from below by the spring 22.

As shown in FIG. 2, the back frame 31 includes a left side frame 31a and a right side frame 31b, which are arranged at predetermined intervals on the left and right, and an upper frame that connects upper portions of the left side frame 31a and the right side frame 31b. 31c and a lower frame 31d that connects the lower parts of the left side frame 31a and the right side frame 31b. An upper panel 32 extending in the width direction is provided near the connection between the upper frame 31c and the left side frame 31a and the right side frame 31b, and a cushion is provided below the upper panel 32 at a substantially central position in the vertical direction of the back frame 31. A spring 33 is provided. The cushion spring 33 is stretched around the left side frame 31a and the right side frame 31b. The cushion spring 33 is provided to provide a seated person with a good sitting comfort. A trim wire 34 (see FIG. 3) described later is attached to the lower frame 31d.

The left side frame 31a and the right side frame 31b are steel plate members that are long in the vertical direction. The upper frame 31c is a U-shaped steel pipe, and both ends thereof are welded to the upper ends of the left side frame 31a and the right side frame 31b. The lower frame 31d is a steel plate member that is long in the left-right direction, and both ends thereof are welded to the lower ends of the left side frame 31a and the right side frame 31b.

(Lumba support device)
As shown in FIG. 2, the lumbar support device 50, which is a displacement input means, is a device that supports the waist of a seated person, and is provided between the left side frame 31a and the right side frame 31b and between the cushion spring 33 and the lower frame 31d. It is provided in between. The lumbar support device 50 includes an interposition member 51, a pressing unit 52, and a drive device 53.

The interposition member 51 is a plate-shaped member (panel) made of synthetic resin or the like and having a thickness of several mm to several tens of mm. The interposition member 51 is not an amorphous flexible member and is not a member that is not easily deformed, but is a member that is deformed by the movement of the pressing unit 52.

As shown in FIG. 3, hook members 51 a and 51 b are provided on the upper side of the interposition member 51. The interposition member 51 is suspended by the cushion spring 33 by the hook members 51a and 51b. In FIG. 3, the lower side of the interposition member 51 is a free end without being connected to other members. With this structure, the interposition member 51 is movable in the left-right and up-down directions within the range permitted by the elasticity of the cushion spring 33. "Freedom" means that you can move freely. Further, the interposition member 51 can freely move in the vertical direction within a range in which the hook members 51a and 51b are not separated from the cushion spring 33.

The interposition member 51 is hung on the cushion spring 33, so that the interposition member 51 is movable inside the seat back 3 so as to approach or move away from the surface of the seat back 3 of FIG.

As shown in FIG. 3, the pressing unit 52 is bridged between the left side frame 31a and the right side frame 31b.

The pressing unit 52 has a first portion 52a and a second portion 52b extending in the axial direction of the axis C, and eccentric portions 52c and 52d that are central portions in the left-right direction. Wire). In the pressing unit 52, the end of the first portion 52a is supported by the drive device 53, and the end of the second portion 52b is rotatably supported by the right side frame 31b. As the pressing unit 52 rotates, the eccentric portion 52c abuts the interposing member 51 and pushes it forward, and also deforms the interposing member 51.

The drive device 53 is a device that rotates the pressing unit 52 around the axis C. The drive device 53 includes a drive source (not shown) that rotates the pressing unit 52. The drive source is a motor whose rotation angle can be controlled, for example, an electric motor such as a pulse motor or a servo motor, and the output shaft thereof can be connected to the first portion 52a of the pressing unit 52. The drive device 53 is fixed to the left side frame 31a.

When a seated person presses a switch (not shown), the drive device 53 drives a drive source such as a motor to rotate a rotating portion (not shown) about the shaft center C, thereby rotating the shaft center C. The pressing unit 52 is rotated around the center. The drive device 53 is configured so that the pressing unit 52 does not rotate when the seated person does not press the switch.

When the driving device 53 rotates the pressing unit 52 around the axis C, the eccentric portion 52c of the pressing unit 52 moves around the axis C, abuts against the intervening member 51, and pushes it forward to insert the interposing member 51. Transform. As a result, the position of the interposition member 51 can be adjusted by the drive device 53 according to the preference of the seated person.

(Appearance configuration)
As shown in FIG. 1, pads 40 are mounted around the cushion frame 21 and the back frame 31. The pad 40 is formed of an elastic material such as urethane foam. The pad 40 is a member that forms the overall appearance shape of the seat cushion 2 and the seat back 3. The pad 40 gives a seated person a preferable sitting feeling, for example, cushioning property. The thickness of the pad 40 is several mm to several tens of mm.

The entire surface of the pad 40 is covered with the skin 41. The outer skin 41 is a portion that is visually recognized or touched from the outside. The edge of the outer skin 41 is fixed to the cushion frame 21 and the back frame 31 by a hog ring or other fixing means.

FIG. 4 is a front view showing a seat back of the vehicle seat of FIG. FIG. 5 is a sectional view taken along the line AA of FIG. FIG. 6 is a diagram for explaining the engaging portion of FIG. FIG. 7 is a sectional view taken along line BB of FIG. FIG. 8 is an enlarged view of a portion indicated by a dashed line D in FIG.

As shown in FIGS. 4 to 6, the pad 40 of the seat back 3 is provided with a slit 40a penetrating in the thickness direction in a U-shape in a front view. The slits 40a are provided on the boundary between the lower main portion 40b and the upper main portion 40c of the pad 40, the boundary between the lower main portion 40b and the left side portion 40d, and the boundary between the lower main portion 40b and the right side portion 40e. .. In the present embodiment, the slit 40a between the lower main portion 40b and the upper main portion 40c is formed to extend in the left-right direction at a substantially intermediate position in the vertical direction of the seat back 3, and the lower end of the lower main portion 40b is formed. The slit 40a is not provided and the connected form is applied. The slit 40a between the lower main portion 40b and the left side portion 40d is formed to extend in the vertical direction of the seat back 3, and the slit 40a between the lower main portion 40b and the right side portion 40e is the seat back. 3 is formed to extend in the vertical direction.

As shown in FIG. 5, the outer skin 41 is for covering and fixing the pad 40 covered with the back frame 31 in a wrapping manner. In addition, by enclosing the structure of the pad 40 and the like to give a clean appearance as a whole, the function of improving the external appearance of the seat back 3 is fulfilled. It also serves to protect components such as the pad 40. It is also for improving the feel of the seated person. The outer skin 41 is formed by appropriately selecting genuine leather, synthetic leather, fibers, or the like, and is formed so as to wrap the outer surface of the pad 40 of the seat back 3, and covers the pad 40 to cover the back frame. It is hung on 31 and fixed. Here, as shown in FIGS. 5 and 7, the outer skin 41 is roughly divided into a lower main skin 41b, an upper main skin 41c, a left side skin 41d, a right side skin 41e, and a back skin 41f. ing.

As shown in FIG. 5, the lower main skin 41b is formed so as to cover the surface of the lower main portion 40b (the surface that supports the seated person). Specifically, the upper end of the lower main skin 41b is configured to cover the upper portion of the lower main portion 40b through the slit 40a. An engaging portion 42 is formed on the upper end of the lower main skin 41b, and the engaging portion 42 engages with the upper panel 32 located on the back surface side of the upper main portion 40c. The engagement portion 42 includes a rubber band 42a (elastic member) and a hook 42b. As shown in FIG. 6, a rubber band 42a is sewn to the upper end of the lower main skin 41b, and a hook 42b is sewn to the tip of the rubber band 42a. Thereby, the lower main skin 41b and the lower main portion 40b are configured to be able to be largely pushed out by the expansion and contraction of the rubber band 42a of the engaging portion 42.

As shown in FIG. 5, an engaging portion 43 is formed at the lower end of the lower main skin 41b, and the trim wire 34 is engaged by the engaging portion 43. The engaging portion 43 includes a webbing 43a (a non-stretchable member) and a hook 43b. A force cloth 43a is sewn to the lower end of the lower main skin 41b, and a hook 43b is sewn to the tip of the force cloth 43a.

In addition, although the engaging portion 42 has the configuration of the rubber band 42a and the hook 42b, the engaging portion 42 is not limited to this. That is, the engaging portion may have the function of engaging and the function of expanding and contracting. Here, the rubber band 42a is not limited to this, and may be any structure as long as it elastically urges, and may be a structure such as a tension spring.

As shown in FIG. 5, the upper main skin 41c is formed so as to cover the surface (the surface supporting the seated person) of the upper main portion 40c. Specifically, the lower end of the upper main skin 41c is configured to cover the lower portion of the upper main portion 40c through the slit 40a. An engaging portion 42 is formed at the lower end of the upper main skin 41c, and the engaging portion 42 engages with the upper panel 32. The engagement portion 42 is composed of a webbing 42c (non-stretchable member) and a hook 42b. A power cloth 42c is sewn to the lower end of the upper main skin 41c, and a hook 42b is sewn to the tip of the power cloth 42c. On the other hand, the upper end of the upper main skin 41c is connected to the back skin 41f by joint sewing. As shown in FIG. 4, both ends in the width direction of the upper main skin 41c are sewn together and integrally connected to the left side skin 41d and the right side skin 41e.

The upper end of the lower main skin 41b is independent of the upper main skin 41c. As a result, the displacement amount of the interposition member 51 of the lumbar support device 50 is unlikely to be affected by the upper main skin 41c.

As shown in FIG. 7, both ends in the width direction of the lower main skin 41b are configured to cover the side portions of the lower main portion 40b through the slits 40a. Further, as shown in FIG. 8, engaging portions 44 are formed at both ends in the width direction of the lower main skin 41b, and the engaging portions 44 engage with the wires 45 inserted into the pad 40. .. The engagement portion 44 includes a rubber band 44a (expandable member) and a clip 44b. A rubber band 44a is sewn to both ends of the lower main skin 41b in the width direction, and a clip 44b is connected to the tip of the rubber band 44a. As a result, the lower main skin 41b and the lower main portion 40b can be largely pushed out by expanding and contracting the rubber band 44a of the engaging portion 44. On the other hand, as shown in FIG. 4, a portion of the lower portion of the lower main skin 41b that does not correspond to the position where the interposition member 51 is provided is sewn together with the left side skin 41d and the right side skin 41e to be integrally connected. ing.

As shown in FIG. 7, the left side skin 41d and the right side skin 41e are formed so as to cover the left side portion 40d and the right side portion 40e. Specifically, as shown in FIG. 8, the right side skin 41e is formed so as to cover a portion from the position of the boundary between the lower main portion 40b and the right side portion 40e to the back surface side. An inner side end portion in the width direction of the right side skin 41e is configured to extend to a position where it is wound around the back surface side of the right side portion 40e through the slit 40a. At the inner end of the right side skin 41e, a force cloth 44c is sewn to the tip thereof, and a clip 44b is sewn to the tip of the force cloth 44c. The clip 44b is inserted into the right side portion 40e. Is engaged with the wire 45. The left side skin 41d has the same structure as the right side skin 41e.

Both ends of the lower main skin 41b in the width direction are independent of the left side skin 41d and the right side skin 41e. As a result, the displacement amount of the interposition member 51 of the lumbar support device 50 is less likely to be affected by the left side skin 41d and the right side skin 41e.

As shown in FIG. 5, the back skin 41f is formed so as to cover the back side of the seat back 3 from the position of the stitching with the upper main skin 41c. As shown in FIG. 7, fasteners 45a, 45b are sewn to the back surface 41f and the back side of the seat back 3 among the left side skin 41d and the right side skin 41e. When opened, the outer skin 41 can be covered with the pad 40 as a whole. The back surface side of the seat back 3 is not limited to the structure of only the outer skin 41, but may have a back board that covers the back surface side of the seat back 3 with a plate member made of synthetic resin.

The operation of the lumbar support device of this embodiment will be described with reference to FIG. FIG. 9 is a view for explaining the operation of the main part of the lumbar support device, and is a cross-sectional view corresponding to FIG.

First, in a normal state where the lumbar support device 50 of FIG. 5 is not operated, the pressing unit 52 is placed in the standby position shown in FIG. This state can be realized by setting the pressing unit 52 to the initial position by the drive device 53. At this standby position, the interposition member 51 is in contact with the eccentric portions 52c and 52d of the pressing unit 52 while being suspended from the cushion spring 33, as shown in FIG.

When the seated person gives an instruction to operate the lumbar support device 50, the drive device 53 rotates the pressing unit 52 in the arrow E direction (counterclockwise direction) as shown in FIG. 9. Then, the eccentric portion 52c moves forward. As a result, the interposition member 51 is deformed in a forward convex shape, and the lower main portion 40b of the pad 40 of the seatback 3 is pressed by the eccentric portion 52c via the interposition member 51. As a result, the seated person's part is supported.

In FIG. 9, if the amount of rotation of the pressing unit 52 in the direction of the arrow E is increased, the amount by which the eccentric portion 52c presses the interposition member 51 increases, so that the lumbar support device 50 supports the waist of the seated person. Can be strengthened. Since the elastic members are used for the engaging portions 42 and 44 of the lower main skin 41b, the interposition member 51 can be pushed forward without being limited by the lower main skin 41b.

In this embodiment, the pad has a U-shaped through slit in the vertical direction of the boundary between the main portion and the side portions on both sides and the central horizontal direction of the main portion. As a result, the main part is divided into an upper main part and a lower main part, and the lower main part can operate independently in the front-rear direction.
Further, the main skin that covers the lower main portion (lower main skin) is fixed by the fixing component having the elastic member via the through slit. As a result, the lower main portion can largely move in the front-rear direction. Since the lower main part is largely movable in the front-rear direction, it is possible to obtain a displacement amount close to the stroke amount of the lumbar support mechanism.
Also, since the pad and the skin are attached separately from the lumbar support mechanism which is the displacement input means, it does not depend on the type or attachment method of the displacement input means used, so it can be applied to displacement input means other than the lumbar support mechanism. It is possible. The present embodiment can provide a skin covering structure that is given a larger displacement amount without being hindered as much as possible and is not easily affected by the size of the displacement input means such as the lumbar support device.

The invention made by the present inventor has been specifically described above based on the embodiment. However, it goes without saying that the present invention is not limited to the above embodiment and can be variously modified.

In the embodiment, the lumbar support device is described as an example of the displacement input means, but a pelvis (pelvis) support device may be used.

Further, in the embodiment, the engaging portion 42 shares the hook 42b that connects the elastic band 42a that is the elastic member and the force cloth 42c that is the non-elastic member, but the rubber band 42a and the elastic cloth 42c are different from each other. It may be connected to the hook. Further, the engaging portion 44 shares the clip 44b for connecting the rubber band 44a and the force cloth 44c, but the rubber band 44a and the force cloth 44c may be connected to different clips.

1... Vehicle seat 2... Seat cushion 3... Seat back 21... Cushion frame 31... Back frame 31a... Left side frame 31b... Right side frame 31c... Upper Frame 31d...lower frame 32...upper panel 40...pad 40a...slit 41...skin 42...engaging portion 50...lumbar support device (displacement input means)

Claims (15)

Vehicle seats are
A seat cushion that receives the buttocks of the seated person,
A seat back that receives the back of the seated person,
Equipped with
The seat back is
A back frame that is a seat skeleton, including an upper frame, a lower frame, and left and right side frames,
A pad attached to the back frame,
An epidermis covering the pad,
Displacement input means for displacing the pad between a position close to the back frame and a position separated from the back frame in the thickness direction thereof,
Equipped with
The pad and the epidermis are
A slit extending in the seat width direction above the position corresponding to the displacement input means,
A slit extending in the vertical direction to the left and right of the position corresponding to the displacement input means,
Have
An end portion of the outer skin at a position corresponding to the displacement input means of the outer skin is locked by the elastic member via the slit. The vehicle seat according to claim 1,
The pad is
A lower main portion arranged at the center in the seat width direction at a position corresponding to the displacement input means,
An upper main portion arranged above the lower main portion,
Left and right side portions arranged outside the width direction of the lower main portion and the upper main portion,
Have
The slit penetrates in a thickness direction at a boundary between the lower main portion and the upper main portion and at a boundary between the lower main portion and the left and right side portions,
The epidermis is
A lower main skin that covers the lower main portion,
An upper main skin that covers the upper main portion,
Left and right side skins that cover the left and right side portions,
Have
The upper end portion of the lower main skin has a first engaging portion that is engaged with the back side of the upper main portion through the slit independently of the upper main skin,
Both end portions in the width direction of the lower main skin have a second engagement portion that is engaged with the left and right side skins on the back side of the left and right side portions independently of the left and right side skins,
The first engaging portion and the second engaging portion have the elastic member. The vehicle seat according to claim 2,
The lower end of the upper main skin has a third engaging portion that is engaged with the back side of the upper main portion through the slit,
The third engagement portion has a non-stretchable member sewn to the lower end portion of the upper main skin. The vehicle seat according to claim 2,
Inner side end portions in the width direction of the left and right side skins have a fourth engaging portion that is engaged at a position on the back surface side of the left and right side portions through the slit,
The fourth engagement portion has a non-stretchable member that is sewn to inner ends of the left and right side skins in the width direction. The vehicle seat according to claim 3,
The first engagement portion has a hook that engages with an upper plate that is provided on the back frame so as to extend in the width direction, and the hook is configured to be coupled to the elastic member. The vehicle seat according to claim 5,
The third engagement portion has a hook that engages with the upper plate, and the hook is configured to be coupled to the non-stretchable member. The vehicle seat according to claim 6,
The hook of the first engaging portion and the hook of the third engaging portion are the same. The vehicle seat according to claim 4,
The second engagement portion has a clip that engages with the wires inserted in the left and right pads, and the clip is configured to be coupled to the elastic member. The vehicle seat according to claim 8,
The fourth engagement portion has a clip that engages with the wire, and the clip is configured to connect to the non-stretchable member. The vehicle seat according to claim 9,
The clip of the second engaging portion and the clip of the fourth engaging portion are the same. The vehicle seat according to claim 2,
The displacement input means is provided across the left and right frames, and has a plate-shaped interposing member that comes into contact with the lower main portion, a pressing unit that displaces the interposing member forward, and a drive device that drives the pressing unit. And a lumbar support device having. The vehicle seat according to claim 11,
The pressing unit is provided across the left and right frames, and has a first portion extending in the axial direction and a second portion eccentric from the axial center,
The driving device is provided on one of the left and right frames, is coupled to the first portion, and is configured to rotate the pressing unit. The vehicle seat according to claim 1,
The skin further has a back skin that covers the back surface of the seat back. The vehicle seat according to claim 2,
The lower end portion of the lower main skin has a fifth engaging portion that is engaged on the back side of the lower main portion,
The fifth engagement portion has a non-stretchable member sewn to the lower end of the lower main skin. The vehicle seat according to claim 14, wherein:
The fifth engagement portion has a hook that engages with a trim wire provided on the lower frame so as to extend in the width direction, and the hook is configured to be coupled to the non-stretchable member.

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