JP2517829Y2 - Car seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle seat in which the shape of the seat surface of a seat back can be adjusted according to the seated person.

[Conventional technology]

Conventionally, as a vehicle seat, for example, one shown in FIG. 8 is known. This is composed of a seat back 1a and a seat bottom 2a, and the seat back 1a is composed of a seat back frame 11a, a covering layer 12a such as a cushion material for covering the seat back frame 11a, and a skin 13a. . In this seat back 1a, the shape of the seat surface
100 is mainly determined by the shape of the coating layer 12a.

Also, as a vehicle seat, there is known a seat back 1a having a swing headrest 3a attached to the upper end thereof. The headrest is configured so as to be tilted about a horizontal axis at the headrest mounting portion.

[Problems to be solved by the device]

In the above-described conventional vehicle seat, the occupant seated on the seat has various physiques, and therefore the shape 100 of the seat surface may not necessarily match the curve of the spine of the occupant. In this case, there is a risk that the seated person will be given back pain and fatigue due to the above-mentioned inconsistency.

Further, this fear cannot be eliminated because the shape 100 of the seat surface cannot be changed even when the headrest 3a is swung.

The present invention has been made to solve such a conventional problem, and an object thereof is to provide an automobile seat in which the shape of the seat surface of the seat back can be adjusted according to the seated person. .

[Means for solving the problem]

In order to achieve the above object, according to claim 1 of the present invention, in a vehicle seat including a seat back and a seat bottom, the seat back includes a seat back frame and a curve of a seat surface in the seat front-rear direction. The seat back frame includes a lower surface frame and a lower frame, and a tilt adjusting means for tilting the upper part of the seat back in the seat longitudinal direction. The seat surface curve converting means is provided on the lower side frame, and the tilt adjusting means is interposed between the lower side frame and the upper side frame. The surface curve conversion means is arranged in the width direction of the seat and has a plurality of horizontal rods movably supported in the front-back direction of the seat, and It is composed of an operating plate for moving the horizontal rod in the front-back direction by moving it downward, and a driving means for moving the operating plate.The tilt adjusting means rotates the upper frame around the horizontal axis. It consisted of a second drive means to be activated.

According to a second aspect of the present invention, the plurality of horizontal rods according to the first aspect are connected to each other by a band-shaped elastic plate, and the elastic plates are arranged on the seat bearing surface side of the horizontal rod.

According to a third aspect of the present invention, the actuation plate is provided with a plurality of guide passage portions in the first or second aspect, and the actuating plate moves in the up and down direction of the seat in the guide passage portions so that the horizontal rod moves toward the seat. It is configured to be obliquely arranged with respect to the above-mentioned vertical direction so as to be operated in the front-back direction.

According to a fourth aspect of the present invention, the driving means according to any one of the first to third aspects is composed of a rotary motor and a driving force converting means for converting a rotational force of the rotary motor into a vertical force.

[Action]

According to the structure of claim 1, in the seat surface curve converting means, the plurality of horizontal rods move in the front-back direction of the seat by driving the driving means to move the operating plate up and down, whereby the seat surface The curve is changed, and in the tilt adjusting means, since the upper part of the seat back tilts in the seat front-back direction, the seat shape having a surface shape closer to the spine curve of the seated person is combined with the conversion of the seat curve of the lower part. A surface is formed.

According to the structure of claim 2, in addition to the operation according to claim 1, the shape in which the front surfaces of the plurality of horizontal rods are connected in the vertical direction,
The elastic plate realizes a smooth curve.

According to the structure of claim 3, in addition to the operation according to claim 1 or claim 2, the horizontal rod moves along the guide passage, so that the seat surface curve can be smoothly converted.

According to the structure of claim 4, in addition to the operation according to any one of claims 1 to 3, the actuating plate is moved up and down by the driving of the driving means.

〔Example〕

In FIG. 1, a vehicle seat is formed of a seat back 1 and a seat bottom 2, and the seat back 1 is composed of an upper body 11 and a lower body 12. Upper body above
11 is an upper frame 11 which is bent in an inverted V shape in a side view.
The headrest 3a (see FIG. 8) of the conventional seat is integrally formed by 1, and the lower body 12 has a lower frame 121 and the seat surface curve converting means 3 supported by the lower frame 121. And are provided. The upper body 11 and the lower body 12 are the seat back height converting means 4
And the tilt adjusting means 5 of the upper body 11 are connected.

Seat Surface Curve Conversion Means The seat surface curve conversion means 3 are arranged parallel to each other in the vertical direction of the seat (the direction of the arrow indicated by Y in FIG. 1, hereinafter simply referred to as the vertical direction), as shown in FIG. A plurality (5 in the example in the figure) movably supported in the front-back direction of the seat (the direction of the arrow indicated by X in the figure, hereinafter simply referred to as the front-back direction).
Horizontal rods 31a to 31e, and a pair of operating plates 32 that support the horizontal rods 31a to 31e so as to be operable in the front-rear direction.
It comprises a first motor 33 for moving the operating plate 32 in the vertical direction.

The first motor 33 is supported by the frame 121 via two vertical reinforcing rods 122 as shown in FIG. 2, and the reinforcing rod 122 has a first gear as shown in FIG. Box 34 is supported. In the first gearbox 34, as shown in FIGS. 3 and 4, the output shaft 331 protruding from both sides of the first motor 33 and the operating plate 32 are connected to each other via the bracket 320. First screw shaft 321
Intersect with each other, the worm 332 of the output shaft 331 in the first gearbox 34 and the first gearbox
A worm wheel 322 rotatably supported by 34 meshes with each other. Inner teeth (not shown) are formed on the worm wheel 322, and a first screw shaft 321 is vertically arranged so as to mesh with the inner teeth.

That is, in the first gearbox 34, the rotational driving force of the first motor 33 about the Z ₁ axis is converted into the vertical operation force by the rotation of the screw shaft 321 about the Y ₁ axis, and
The left and right first screw shafts 321 are raised by the normal rotation of the motor 33 and are lowered by the reverse rotation. The driving force converting means such as the worm 332 and the first motor 33 constitute a driving means of the seat surface curve converting means 3 for moving the operating plate 32 up and down.

A support plate 35 fixed to the frame 121 is superposed on the operation plate 32, and the vertical movement is guided by the support plate 35. The support plate 35 is formed with five elongated holes 351a to 351e for supporting the horizontal rods 31a to 31e in the front-rear direction Y, and the operating plate 32 is provided with the horizontal rods.
Corresponding to 31a to 31e, five guide grooves (guide passage portions) 323a to
323e is formed therethrough, and these elongated holes 351a to 351e and the guide groove 32 are formed.
The end portions of the horizontal rods 31a to 31e are pierced and supported by 3a to 323e.

The guide grooves 323a to 323e are arranged obliquely with respect to the vertical direction Y and are formed in different shapes depending on the vertical positions of the horizontal rods 31a to 31e, whereby the guide grooves 32 are formed.
The distance in the front-rear direction X between the start end and the end of 3a to 323e is the horizontal rod.
A predetermined amount is set according to 31a to 31e. That is, the horizontal rods 31a to 31e are moved in the front-rear direction X by the elongated holes 351a to 351e.
Since the movement in the vertical direction Y is restricted, the guide grooves 323a to 323e have the above-mentioned horizontal rods 31a to 31e.
When moving in the vertical direction Y with respect to the horizontal rods 31a to 31e,
Is guided by these guide grooves 323a to 323e, and the long holes 323a to 32e
It moves in the front-back direction X in 3e.

On the seat seat surface side of the above-mentioned five horizontal rods 31a to 31e, the third
As shown in FIGS. 4 and 5, a plurality of thin plate members (belt-shaped elastic plates) 311 made of strip-shaped metal are arranged in the up-down direction, and the thin plate members 311 are connected to each other via a connecting member 312 to make the horizontal state as described above. It is rotatably connected to the rods 31a to 31e. The thin plate member 311 forms a smooth curve in the vertical direction connecting the five horizontal rods 31a to 31e, and this curve is the seat surface curve 10a.
Appears on the seat back of the seat back as ~ 10c.

That is, in the seat surface curve converting means 3, the operating plate 32 is moved up and down by driving the first motor 33 by turning on the first switch (not shown),
By the vertical movement of the operating plate 32, the five horizontal rods 31a-3
The arrangement of 1e in the front-rear direction X is changed, and the working plate 32
Shows a bearing surface curve shown by 10a in FIGS. 1 and 4 at the lowermost position (the position shown by the solid line in FIG. 4), and the operating plate 32 is in the middle position (shown by the one-dot chain line in FIG. 4). The seat surface curve indicated by 10b at the position) and the seat surface curve indicated by 10c at the uppermost position (the position indicated by the chain double-dashed line in FIG. 4) are converted into three kinds of seat surface curves.

Seatback Height Converting Means The seatback height converting means 4, as shown in FIG. 2, is a gate-shaped slide means in a front view interposed between an upper frame 111 and a lower frame 121, and the upper part. The side frame 111 is configured to move up and down.

The sliding means is composed of slider rails 41 arranged vertically on the left and right sides of the lower body 12, and the slider rails 41.
It is configured in a gate shape from a horizontal beam member 42 connecting the upper ends of 41. In the slider rail 41, a movable side guide rail 411 connected to the lateral beam member 42 and a fixed side guide rail 412 attached to the lower frame 121 are fitted so as to be slidable in the vertical direction Y. .

As shown in FIG. 7, the movable side guide rail 411 is formed in a groove shape having a cross section opened to the seat rear side (upper side in the same figure) by the base plate portion 410 and the side plate portion 413, and the upper end edges on both sides thereof are formed. The outward edges 414 are formed so as to project outward in opposite directions. The fixed side guide rail 412 includes a board portion 415 and a side plate portion 416.
The cross section is formed into a groove shape that opens to the front of the seat (downward in the figure), and the inward edges 417 are formed at the lower edges on both sides.
Are formed so as to project in directions opposite to each other. The movable side guide rail 411 and the fixed side guide rail 412 have a roller 418 between the base plate portions 410 and 415, and side plate portions 413 and 413.
Steel balls 419 are interposed in rolling contact with each other between 416 and between the outward edge 414 and the inward edge 417. The steel balls 419 regulate the movement in the left-right direction and the front-back direction, and the rollers 418. The movable guide rail 411 is fitted to the fixed guide rail 412 so that it can move in the vertical direction Y by rolling.

As shown in FIG. 6, terminal members 112 having a substantially triangular shape in a side view are fixed to both lower ends of the upper frame 111, and one side of the lower end portion of the terminal member 112 and the lateral beam member 42 are the lateral beam members. Horizontal axis Z ₂ by bracket 421 fixed to 42
They are rotatably connected to each other. Therefore,
The movable-side guide rail 411 slides vertically along the fixed-side guide rail 412, so that the upper-side frame
111 rises with respect to the lower frame 121.

The driving means of the seat back height converting means 4 is the second
Second horizontally arranged as shown in FIGS. 7 and 7.
Motor 43 and a second screw shaft 44 arranged in the vertical direction Y. The second motor 43, like the first motor 33, has a lower frame 121 through a reinforcing rod 122.
The upper end of the second screw shaft 44 is connected to the lateral beam member 42 so as to be rotatable about the vertical axis Y ₂ as shown in FIG.

A second gearbox 45 is supported by the reinforcing rod 122 as shown in FIGS. 6 and 7, and the second gearbox 45 projects into both sides of the second motor 43. The output shaft 431 and the second screw shaft 44 intersect with each other, and are rotatably supported by the worm 432 of the output shaft 431 in the second gearbox 45 and the second gearbox 45. The rotational driving force of the second motor 43 is converted into the vertical actuating force of the second screw shaft 44 by the worm wheel 451 thus formed, similarly to the first gear box 34 in the seat surface curve converting means 3. It is configured.

In the seat back height converting means 4, when the second motor 43 is driven by turning on a second switch (not shown), the rotational driving force about the Z ₃ axis is generated in the second gear box 45. Since the second screw shaft 44 is converted into a vertical actuating force by the rotation around the Y ₂ axis, the second motor 43
The right and left second screw shafts 44 are raised by the forward rotation of the above, and are lowered by the reverse rotation. Along with this, the upper body 11 rises (see the two-dot chain line in FIGS. 1 and 2 and the one-dot chain line in FIG. 6) and descends (the solid line in FIGS. 1, 2, and 6). The vertical position is converted and adjusted. Thus, the height of the seat back 1 is changed and adjusted.

When operating the seat back height converting means 4, the third motor 51 of the tilt adjusting means 5 described later is also turned on by turning on the second switch, and the second screw shaft 44 is turned on.
The third screw shaft 52 is also configured to ascend and descend in synchronism with the above.

Tilt Adjusting Means The tilt adjusting means 5 is composed of a third motor 51 arranged horizontally as shown in FIG. 2 and a third screw shaft 52 arranged in the vertical direction Y. The third motor 51
Like the other motors 33 and 43, is attached to the lower frame 121 via the reinforcing rod 122, and the reinforcing rod 122 is
A third gearbox 53 is supported by the third gearbox 53 as shown in FIGS. 6 and 7. In the third gearbox 53, the worm 512 fixed to the output shaft 511 of the third motor 51 and the worm wheel 521 screwed to the third screw shaft 52 mesh with each other to cause 1 and 2
Similar to the internal structure of the gearboxes 34 and 45, the rotational driving force of the third motor 51 is converted into the vertical actuating force of the third screw shaft 52. The upper end of the third screw shaft 52 is connected to the other end of the lower end of the terminal member 112 of the upper frame 111 so as to be rotatable about a horizontal axis, as shown in FIG.

The third motor 51 and the driving force converting means such as the worm 512 constitute a driving means (second driving means) of the tilt adjusting means.

In the tilting means 5, when the third motor 51 is driven by turning on a third switch (not shown), the upper frame 111 is moved to the horizontal axis Z by the rise of the third screw shaft 52.
_It is tilted to the front side of the seat about ₂ times and tilted to the opposite side by descending. With the tilting of the upper frame 111, the upper body 1
1 tilts in the front-back direction of the seat (see the solid line and two-dot chain line in Fig. 6).

Thus, in this embodiment, the lower body of the seat back 1 is
Since the seat surface curve converting means 3 is provided on the seat 12, the seat surface curve can be changed and adjusted in accordance with the spine curve of the seated person, especially from the waist to the upper body, and the seating is comfortable depending on the seated person. A state can be formed, and the occurrence of back pain and fatigue due to the disagreement with the spine curve can be reliably prevented.

Further, the seat back curve converting means 3 is provided on the seat back 1.
In addition to the above, tilt adjusting means 5 for the upper body 11 is provided,
Since 11 can be tilted about the horizontal axis Z _{2 with} respect to the lower body 12, that is, in the anteroposterior direction X, the curve of the seating surface can be adjusted to match the spine curve of the seated person, especially from the upper body to the head. It is possible to adjust the change, and in combination with the seat surface curve converting means 3 in the lower body 12, it is possible to more reliably and easily form a comfortable sitting state according to a seated person, and the occurrence of the above-mentioned back pain and fatigue. Can be prevented more reliably.

Further, the seat back 1 is provided with a seat back height converting means 4 for the upper body 11, and the lower body for the upper body 11 is provided.
Seat back 1 by adjusting the vertical position relative to 12
Since the height of the entire seat can be changed, it is possible to more easily and more reliably form the seat surface curve according to the physique of the seated person.

Moreover, these seat surface curve converting means 3 and tilt adjusting means 5
Since the seat back height converting means 4 can be operated independently of each other by the ON / OFF operations of the first to third motors 33, 43, 51, the converting operation can be easily performed. It is possible to surely adjust to the desired seat curve or the vertical position.

 Other aspects of the above embodiment will be described below.

A. In the above embodiment, the case where the seat surface curve converting means 3, the seat back height converting means 4 and the tilt adjusting means 5 are combined is shown, but the present invention is not limited to this, and for example, the seat back height converting means. The seat back may be provided with a combination of the seat surface curve converting means and the tilt adjusting means except for the means 4. In this case, it is not necessary to separate the upper body and the lower body from each other, and the seat back may be integrally formed by the covering layer and the skin.

B. In the above embodiment, the driving force converting means combined with the first to third motors for driving the seat surface curve converting means 3, the seat back height converting means 4 or the tilt adjusting means 5 is a worm, a worm wheel or Although it is configured by a screw shaft or the like, it is not limited to this, and may be configured by, for example, a rack and a pinion.

C. In the above embodiment, the driving means for driving the seat surface curve converting means 3, the vertical adjusting means 4 or the tilt adjusting means 5 is configured by combining the motor and the driving force converting means, but is not limited to this. For example, a hydraulic cylinder or an air cylinder is used as a driving means, which is arranged in the vertical direction, and a cylinder rod and, for example, a working plate in the seat surface curve converting means are connected to each other to directly drive the expansion and contraction of the hydraulic cylinder. It may be configured as follows.

D. In the above embodiment, the motor and the driving force converting means are combined as the driving means of the tilt adjusting means, but the invention is not limited to this. For example, the output shaft of the motor and the rotating shaft of the upper frame are mutually The driving force converting means may be omitted by arranging them in the same direction and connecting them to each other.

E. In the above embodiment, the horizontal rods of the seat surface curve converting means are connected by the thin plate member, but the present invention is not limited to this, and the thin plate member may be omitted.

F. In the above embodiment, the operation plate is configured to be vertically movable in three steps so that three types of seat surface curves can be formed, but the present invention is not limited to this. It may be possible to adjust the vertical movement in a stepless manner by adjusting the adjustment so that the seat curve can be adjusted in a stepless manner.

G. In the above embodiment, the guide passage portion is formed by the guide groove formed through, but the guide passage portion is not limited to this, and may be formed by, for example, a guide groove.

[Effect of device]

As described above, according to the vehicle seat of claim 1 of the present invention, since the curve of the seat surface of the seat back can be changed, the seat surface curve is changed and adjusted according to the spine curve of the seated person. Therefore, it is possible to form a comfortable sitting state depending on the seated person, and it is possible to surely prevent the occurrence of back pain and fatigue due to the disagreement with the spine curve. Moreover, since the upper part of the seat back can be tilted in the seat front-rear direction, a seat surface having a surface shape closer to the spine curve of the seated person can be formed in combination with the conversion of the seat curve of the lower part. It is possible to more reliably and easily form a comfortable sitting state according to the seated person, and it is possible to more reliably prevent the occurrence of the above-mentioned back pain and fatigue.

According to claim 2, in addition to the effect according to claim 1, the seat surface curve of the seat back can be formed more smoothly.

According to claim 3, in addition to the effect according to claim 1 or 2, the seat rod curve can be smoothly converted by moving the horizontal rod along the guide passage.

According to claim 4, in addition to the effect according to any one of claims 1 to 3, the vertical movement of the operating plate and the conversion operation of the seat surface curve can be easily performed by the combination of the motor and the driving force converting means. You can

[Brief description of drawings]

FIG. 1 is a sectional explanatory view taken along the line AA of FIG. 2, and FIG. 2 is a sectional explanatory view showing a seat back of an embodiment of the present invention with a part of the structure of a covering layer and a seat surface curve converting means omitted. 3 and FIG. 3 are drawings equivalent to FIG. 2 showing the construction of only the seat surface curve converting means, FIG. 4 is an enlarged sectional explanatory view taken along the line BB of FIG. 3, and FIG. 5 is of FIG. 6 is an enlarged sectional explanatory view taken along the line CC, FIG. 6 is an enlarged sectional explanatory view taken along the line D-D in FIG. 2 excluding the seat surface curve converting means, and FIG. 7 is taken along the line E-E in FIG. FIG. 8 is an enlarged cross-sectional explanatory view in FIG. 8, and FIG. 8 is a cross-sectional explanatory view showing a conventional automobile seat. 1 ... Seat back, 2 ... Seat bottom, 3 ... Seat surface curve converting means, 5 ... Tilt adjusting means, 10a-10c ... Seat surface curve, 11 ... Upper body, 12 ... Lower body, 31a ~ 31e ……
Horizontal rod, 32 ...... Operating plate, 33 ...... First motor, 51
...... Third motor, 52 …… Third screw shaft, 111 …… Upper frame, 121 …… Lower frame, 311 …… Thin plate member,
321 …… first screw shaft, 322,521 …… worm wheel, 32
3a to 323e …… Guide groove, 332,512 …… Worm, Z ₂ …… Horizontal axis of rotation of the upper body.

Claims (4)

(57) [Scope of utility model registration request] 1. A vehicle seat including a seat back and a seat bottom, wherein the seat back includes a seat back frame, a seat surface curve conversion means for changing a curve of a seat surface in a seat longitudinal direction, and the seat. The seat back frame includes a lower side frame and an upper side frame connected to the lower side frame so as to be capable of tilting about a horizontal axis. The seat surface curve converting means is provided in the lower side frame, the tilt adjusting means is interposed between the lower side frame and the upper side frame, and the seat surface curve converting means is arranged in the seat width direction. A plurality of horizontal rods that are arranged and supported so as to be movable in the front-back direction of the seat and the horizontal rods that are moved by moving in the vertical direction And a driving means for moving the operating plate, and the tilt adjusting means is composed of a second driving means for rotating the upper frame around the horizontal axis. A car seat characterized by having 2. A vehicle seat according to claim 1, wherein a plurality of horizontal rods are connected to each other by a band-shaped elastic plate, and the elastic plates are arranged on the seat bearing surface side of the horizontal rod. 3. The actuating plate is provided with a plurality of guide passage portions, and the guide passage portions are arranged so that the horizontal rod is actuated in the longitudinal direction of the seat by moving the actuating plate in the vertical direction of the seat. The vehicle seat according to claim 1 or 2, wherein the vehicle seat is arranged obliquely with respect to the vertical direction. 4. The driving means comprises a rotary motor and a driving force converting means for converting a rotational force of the rotary motor into a vertical force, as claimed in any one of claims 1 to 3. The automobile seat described in.