JPH09254686A - Automotive seat usable for both adult and child - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items of an automotive seat usable for both adults and children by simplifying its structure, the seat having a center cushion that is separated therefrom so that its height can be varied. SOLUTION: A recess 10a is formed in the top surface of the center the rear half of a seat cushion 10, and a flexible support belt 20 attached to the frame of the seat cushion at both ends is provided in such a way that it is convertible between two states within the recess, i.e., a tense state in which it is stretched almost parallel to the bottom surface 10a of the recess and a slack state in which it hangs down freely. A center cushion 28 constructed of a flexible pad covered with a cushion cover can be inserted into the recess, with the thickness of the cushion being almost equal to the depth of the recess and with substantially no gap between them. The center cushion, if inserted with the support belt tensed, is converted to a configuration for use by children in which it projects from the seat cushion and, if inserted with the belt slackened, converts to a configuration for use by adults in which it does not project from the seat cushion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat for adults and children, which can be switched between an adult seat and a child seat.

[0002]

2. Description of the Related Art As an automotive seat for adults and children of this type, there is a technology disclosed in, for example, Japanese Patent Application Laid-Open No. 52-71020. This allows the central portion of the seat cushion to be lifted up to a predetermined height as a separate body, and in the lowered position at the same height as the seat cushion, as an adult seat,
It is also designed to be used as a child seat in the raised position. In this technique, a plurality of folding legs (link mechanism) that can be folded are provided so that the height of the central portion can be switched between the lowered position and the raised position.

[0003]

However, the above-mentioned prior art has a problem that the link mechanism for supporting the central portion of the seat cushion and its operating mechanism are complicated and the number of parts is increased, resulting in an increase in manufacturing cost. . SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a vehicle seat for adults and children, which has a simple structure and a small number of parts.

[0004]

A vehicle seat for adults and children according to the present invention is a flexible support belt in which a recess is formed in the upper surface of the center of the rear half of the seat cushion and both ends are attached to the frame of the seat cushion. Is provided in the recess so as to have two states, a tensioned state stretched almost parallel to the bottom surface of the recess and a relaxed state in which the tension freely hangs in the recess. The central cushion, which is inserted into the recess of the seat cushion, has a flexible pad covered by a cushion cover and can be inserted into the recess with substantially the same thickness as the depth of the recess without any gap.

When used for adults, the support belt is in a relaxed state and the central cushion is inserted into the recess. In this state, the central cushion is supported by the bottom surface of the recess, and the upper surfaces of the central cushion and the seat cushion are approximately flush with each other. When used for children, the support belt is tensioned and the central cushion is inserted into the recess. In this state, the central cushion is supported in the recess by a support belt stretched almost parallel to the bottom surface of the recess and projects upward from the upper surface of the seat cushion.

On the lower surface of the central cushion and the upper surface of the support belt, one half and the other half of the surface fasteners which engage with each other are provided, respectively, and in a tension state, the central cushion is supported by the support belt via the surface fasteners. Preferably.

The support belt is provided with a connecting member which is divided into two halves at an intermediate portion which is in the recess of the seat cushion and which detachably connects the respective halves. The state may be changed to a relaxed state by being released.

Alternatively, the support belt may be attached to the frame via a winding device whose one end is rotatable in the winding direction but is prevented from rotating by a reverse rotation preventing mechanism which is detachable in the rewinding direction. It may be arranged such that it is attached and wound by the winding device to be in a tensioned state, and the reverse rotation preventing mechanism is detached and rewound to be in a relaxed state.

On at least one side of the rear portion of the recess, a belt guide having an oblong slit and an opening formed at one end thereof for allowing the seat belt to be inserted and removed is provided above the seat cushion. It is preferably attached via a strap so that it is exposed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment shown in FIGS. 1 to 5 will be described. The vehicle seat for adults and children of this embodiment includes a seat cushion 10 and a seat back 18, and the seat back 18 is attached to a rear portion of the seat cushion 10 via a reclining device (not shown) so that an inclination angle can be adjusted. ing. As shown mainly in FIG. 1, FIG. 4 and FIG.
A central cushion 28 can be attached / detached to / from the deep recess 10a formed in the upper surface of the rear center in two states having different heights.

As shown mainly in FIGS. 2 and 3, the seat cushion 10 is formed by covering the pads 12 placed on the front half, the rear, and both sides of the bottom plate 11 forming the frame with the seat cushion cover 13. is there. Inverted L-shaped cut-and-raised parts 11a are formed on the four downward flanges of the bottom plate 11 made of sheet metal, and a plurality of nose rings 11b are cut along a large quadrangle in the rear center of the frame 11. Raised and formed.

The seat cushion cover 13 is formed by inserting the synthetic resin plates 13a sewn on the four sides between the flange portion and the cut-and-raised portion 11a of the bottom plate 11 so that the outer peripheral portion is hooked on the bottom plate 11. It is attached. At the inner peripheral portion of the seat cushion cover 13, a lower edge extending downward is folded back and sewn and a wire 13b is passed therethrough. A plurality of hog rings 14 that penetrate the seat cushion cover 13 and are engaged with the wire 13b are provided at intervals. Is attached to the bottom plate 11 by hooking on a plurality of nose rings 11 b formed on the bottom plate 11. As a result, a substantially quadrangular deep recess 10a having a bottom surface 10b at the center of the rear portion of the bottom plate 11 is formed above the center of the rear portion of the seat cushion 10. The seat cushion cover 13 is made of a material having a flexible elastic foam cover integrally provided on the back surface of a skin material such as woven fabric or leather, and having a plurality of elastic materials in the stretching direction. This is the sewn part.

As shown mainly in FIGS. 2 and 3, the support belt 20 is divided into two long and short halves 20a and 20b.
The outer ends of the above are passed through the openings at the upper ends of a pair of substantially L-shaped mounting plates 22 that are bolted and fixed to the left and right sides of the bottom surface of the bottom plate 11, and then are attached by folding back stitching. The respective halves 20a, 20b are slit-shaped throttle holes 11c formed near the upper ends of the rising portions on both sides of the bottom plate 11, corresponding to the through holes 12a formed in the pad 12 and the recesses of the seat cushion cover 13. A hook 21a and a ring 21b, which are introduced into the recess 10a through a slit hole 13c formed on the side of 10a and form a coupling tool 21 that can engage and disengage from each other, are attached to the inner ends of the recesses 10a.
As shown in the figure, when the hook 21a and the ring 21b are engaged to connect the connecting tool 21, the support belt 20 is recessed 1
0a is in a tensioned state in which it is stretched almost parallel to the bottom surface 10b of the recess 10a at an intermediate portion in the vertical direction, and the hook 21
When a and the ring 21b are separated from each other, there is a relaxed state in which the ring a freely hangs in the recess 10a.

As shown in FIGS. 1 and 3, the support belt 2
One half 20a of 0 is longer than the other half 20b,
Therefore, the coupling tool 21 is, in the coupled state, the recess 10a
It is offset to one side (right side in FIG. 3). As shown in FIGS. 1 and 2, two sets of the support belts 20 are provided in the recess 10a so as to extend in the left-right direction with a front-rear space therebetween, and thus support both ends thereof. The mounting plate 22 and the holes 11c, 12a, 13c are also provided in the front and rear, respectively. However, the two sets of support belts 20 may be provided so as to extend in the front-rear direction with a space left and right. The support belts 20 may be one set as long as the width is sufficient to prevent the central cushion 28 from tilting.

As shown in FIGS. 2 to 4, the anchor bracket 25 is bolted and fixed to the rear side of the bottom surface 10b of the recess 10a on the outside (right side in FIG. 3) of the vehicle body of the seat cushion 10. A belt guide 23 that can be exposed on the upper side is connected via a strap 24 made of the same material as the seat belt. This belt guide 23
Includes a slit 23a formed horizontally and a seat belt 40 formed at a rear end portion thereof which will be described later.
An opening 23b is formed so that it can be inserted and removed.
The members 23 to 25 may be provided on the left and right sides of the rear portion of the recess 10a.

Next, the central cushion 28 which is removably inserted into the recess 10a will be described. As shown in FIG.
The central cushion 28 has a substantially same cubic shape as the depth of the recess 10a and can be inserted into the recess 10a with substantially no gap therein, and is a pad made of a flexible synthetic resin foam such as urethane foam. Is covered with a cushion cover. This cushion cover is formed by sewing a plurality of portions made of a flexible material similar to the seat cushion cover 13 into an upright cubic bag shape, and slides continuously provided on two side surfaces so that pads can be taken in and out. It can be opened and closed by the fastener 28a.

One half 29a of the tape-shaped fastener is sewn to the bottom surface of the central cushion 28 at the same interval as that of the support belt 20, and the other half 29b of this fastener is used for each support belt. 20 half half 20a
Sewn on. This hook-and-loop fastener has one half 29a in which a large number of loop-shaped fibers are provided on the surface of the base cloth.
And the other half portion 29b provided with a large number of elastic synthetic resin hooks on the surface of the base cloth.

When the adult automobile seat is used for adults, the hook 21a of the connecting tool 21 is used.
And the ring 21b are detached, and the two half portions 2 of the support belt 20 are
The central cushion 28 is inserted into the recess 10a with 0a and 20b being in a relaxed state in which they freely hang down in the recess 10a. In this state, the central cushion 28 is supported by the bottom surface provided with the half portion 29a of the surface fastener abutting on the bottom surface 10b of the recess 10a, and the upper surface of the central cushion 28 substantially coincides with the upper surface of the seat cushion 10. There is. Therefore, FIG.
As shown in the perspective view of FIG.

When used for children, FIG.
As shown in FIG. 3, the hook 21a of the connector 21 and the ring 21b are engaged and connected, and the support belt 20 is inserted into the recess 10a.
The lower half of the central cushion 28 is inserted into the recess 10a in a tensioned state in which it is stretched approximately parallel to the bottom surface 10b of the recess 10a at an intermediate portion in the vertical direction. In this state, in the central cushion 28, the half 29a of the bottom surface fastener is
A half 29b on one half 20a of the stretched support belt 20 is supported by abutting engagement with the half 29b, and the upper half of the central cushion 28 projects upward from the upper surface of the seat cushion 10. Therefore, as shown in the perspective view of FIG. 4, the child is seated and used. Each half 29a, 2 of the hook and loop fastener
9b are engaged and connected to each other, so that the central cushion 28
Does not easily come off or shift its position.

FIG. 4 is an external perspective view of the adult / children's automobile seat in a state of being used by a child. One end is fixed to the floor of the vehicle via an anchor plate 42, and the other end is wound by a retractor (not shown) via belt guides 43, 44 provided on the shoulder portion of the seat back 18 and the center pillar of the vehicle body, The seat belt 40 provided with the slidable tongue plate 41 in the middle portion is used in the seat cushion 10 as shown in FIGS.
It is used by inserting it into the belt guide 23 pulled out to the upper side. With the child seated, if the tongue plate 41 is inserted into the buckle 45 connected to the floor of the vehicle via the strap 45a and the seat belt 40 is worn,
Since the space between the child's body and the seat belt 40 in the lateral direction is reduced by inserting the belt guide 23, the stability of the body in the lateral direction can be improved. If the belt guides 23 are attached to the left and right sides of the rear portion of the recess 10a, the seat belt 40 needs to be inserted and removed with respect to the belt guide 23, which is the inside of the vehicle body, so that the operation is somewhat troublesome. But
The stability of the body in the lateral direction is further improved.

Next, a second embodiment shown in FIGS. 6 to 10 will be described. In the vehicle seat for adults and children of this embodiment, each support belt 20 extends in the front-rear direction,
This is different from the first embodiment in that the support belt 20 is placed in a tensioned state and a relaxed state by winding and rewinding by a winding device 30 provided at the rear portion.

As shown in FIG. 7, the seat cushion 10
The seat cushion cover 13 covers the pads 12 placed on the front half, the rear, and both sides of the bottom plate 11, and the basic structure is the same as that of the first embodiment.
The seat back 18 is also attached to the rear portion of the seat cushion 10 so that the inclination angle can be adjusted.

As shown mainly in FIG. 7, the support belt 2
In No. 0, the rear part is wound around a winding device 30 (described later) attached to the rising part on the rear side of the bottom plate 11, and the attachment plate 22a is attached to the front end. The support belt 20 extending forward from the winding device 30 and the attachment plate 2 at the tip thereof.
2a is a slit-shaped throttle hole 11e formed near the upper end of the rising portion of the bottom plate 11 to which the winding device 30 is attached.
And, it is introduced into the recess 10a through the slit hole 13d of the seat cushion cover 13, passes through the slit hole 13d on the front surface of the recess 10a and the throttle hole 11d near the upper end of the front side rising portion of the bottom plate 11, and the mounting plate 22a is It is fixed to the front part of the bottom plate 11 by bolts. As shown in the figure, the support belt 20 can be wound by the winding device 30 at the rear part.
Is in a tensioned state in which it is stretched approximately parallel to the bottom surface 10b of the recess 10a at an intermediate portion in the vertical direction within the recess 10a, and when the winding device 30 is rewound, the relaxation that freely hangs in the recess 10a. It becomes a state.

Next, the winding device 30 will be described. Both ends of the take-up shaft 32 are rotatably supported by a pair of left and right brackets 31a and 31b fixed to the rising portion of the rear portion of the bottom plate 11, and contact with the bracket 31a on the outer side of the vehicle body and fixed by a push screw or the like. The axial movement is restricted by the clip ring 32b that is locked at the opposite end of the ratchet 36. This winding shaft 32 is a ratchet 36.
Through the holes provided in the bottom plate 11 and the seat cushion cover 13 and the holes provided in the outer shield 16 fixed to the bottom plate 11, and the handle 33 is provided at the tip thereof.
Is attached by a clip or the like. As shown mainly in FIG. 10, each support belt 2 is provided in the diametrical slits 32a formed at two locations in the longitudinal direction of the winding shaft 32.
The rear end portion of 0 is inserted and sewn so as not to come off, and the rear portion of each support belt 20 is wound by the winding shaft 32.

The reverse rotation preventing mechanism 35 provided between the winding shaft 32 and the bracket 31a is mainly arranged as shown in FIG.
A ratchet 36 coaxially fixed to the winding shaft 32,
It is composed of a pole 37 swingably supported by a bracket 31a by a pin 38, and a spring 39 provided between the bracket 31a and the pole 37 and biasing a claw portion of the pole 37 toward a tooth portion of a ratchet 36. ing.
A part of the pole 37 is bent outward in a direction parallel to the winding shaft 32, and its tip portion 37a passes through the bottom plate 11 and the seat cushion cover 13 and is formed on the outer shield 16 with the winding shaft 32 as the center. It is exposed to the outside through the elongated hole 16a. When the ratchet 36 and the pole 37 are engaged by the spring 39, the support belt 2
When rotating 0 in the winding direction (clockwise in FIGS. 7, 9 and 10), the winding shaft 32 is free to rotate, but rotation in the opposite direction, that is, in the rewinding direction, prevents reverse rotation. Blocked by mechanism 35. In addition, the tip 37
When the hand is put on a and the pole 37 is rotated counterclockwise against the spring 39 to release the engagement between the ratchet 36 and the pole 37, the reverse rotation preventing mechanism 35 is disengaged and the winding shaft 32 is removed. The rotation in the rewinding direction is free.

This automobile seat for both adults and children is shown in FIG.
As shown by the alternate long and two short dashes line, each support belt 20 is inserted through each belt passage 28b of the central cushion 28 for use.
When used as an adult, the reverse rotation prevention mechanism 35 is detached and the handle 33 rotates the take-up shaft 32 sufficiently in the rewinding direction so that the support belt 20 is completely attached to the front and rear surfaces of the recess 10a and the bottom surface 10b. The central cushion 28 is inserted into the recess 10a in a relaxed state in which it hangs down. In this state, the central cushion 28 has the belt loop 28b.
The bottom surface provided with is abutted against and supported by the bottom surface 10b of the recess 10a, and the upper surface of the central cushion 28 is the seat cushion 1
It almost coincides with the upper surface of 0. The perspective view of FIG. 5 shows this state when an adult is seated and used.

When used for children, FIG.
As shown in FIG. 6, the reverse rotation prevention mechanism 35 is brought into the engaged state, and the handle 33 rotates the take-up shaft 32 in the take-up direction. As a result, as shown in FIG. 6 and FIG. The bottom surface 10 of the recess 10a at the intermediate portion in the vertical direction
The lower half portion of the central cushion 28 is inserted into the recess 10a in a tensioned state in which it is stretched almost parallel to b. In this state, the central cushion 28 has the support belt 20 stretched.
Supported above, the upper half of the central cushion 28 projects upward from the upper surface of the seat cushion 10. The perspective view of FIG. 4 shows this state in which the child is seated and used. Since the method of wearing the seat belt 40 and the operation thereof are the same as those in the first embodiment, detailed description thereof will be omitted.

In this state, by adjusting the winding amount of the support belt 20 by the winding device 30, the seat cushion 1 of the central cushion 28 in a child use state.
0 The amount of upward protrusion from the upper surface can be adjusted so that the height of the central cushion 28 can be adjusted to the physique of the child. Since the support belt 20 is inserted through the belt passage 28b of the central cushion 28 and the two members 20 and 28 are connected to each other, the central cushion 28 is easily detached,
The position does not shift. The belt loop 28
Instead of b, the same hook and loop fastener as in the first embodiment may be used to connect the central cushion 28 to the support belt 20.

[0029]

As described above, according to the present invention, only the support belt is provided on the seat cushion side so as to take the tensioned state and the relaxed state, and the central cushion covers the flexible pad with the cushion cover. Because it ’s fine
The structure is extremely simple and the number of parts is small. Therefore, the manufacturing cost can be reduced.

According to the structure in which the lower half of the central cushion and the upper half of the support belt are provided with one half and the other half of the hook-and-loop fasteners which engage with each other, the central cushion projects upward from the upper surface of the seat cushion. It is possible to prevent the central cushion from being easily detached or displaced in the child use state.

According to the structure in which the support belt is divided into two halves and the connecting tool is provided between the two halves, a structure for attaining two states of a tension state and a relaxation state can be obtained very easily.

Further, according to the one in which one end of the support belt is attached to the frame by the winding device equipped with the reverse rotation preventing mechanism, the winding amount of the support belt in the tensioned state is adjusted so that the support belt can be used in children. By adjusting the amount of upward protrusion of the central cushion from the upper surface of the seat cushion, the height of the central cushion can be adjusted according to the physique of the child.

Further, according to the above-mentioned one in which the belt guide is attached to at least one side of the rear portion of the recess so as to be exposed to the upper side of the seat cushion, the seat belt is inserted into this belt guide when it is used for children. This can improve the lateral stability of the seated child.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a first embodiment of an automobile seat for adults and children according to the present invention with a central cushion removed.

FIG. 2 is a central longitudinal sectional view of the seat cushion of the first embodiment shown in FIG. 1 with the central cushion removed.

FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2 showing the central cushion by a chain double-dashed line in a use state for children.

FIG. 4 is an overall perspective view of the first embodiment in a pediatric use state.

FIG. 5 is an overall perspective view of the first embodiment in an adult use state.

FIG. 6 is an overall perspective view of a second embodiment of a vehicle seat for adults and children according to the present invention with a central cushion removed.

7 is a central longitudinal sectional view of the seat cushion of the second embodiment shown in FIG. 6 in a child use state in which the central cushion is indicated by a chain double-dashed line.

8 is a sectional view taken along line 8-8 of FIG. 7, showing the winding device 30. FIG.

9 is a sectional view taken along line 9-9 of FIG.

10 is a sectional view taken along line 10-10 of FIG.

[Explanation of symbols]

10 ... Seat cushion, 10a ... Recess, 10b ... Bottom surface, 11 ... Frame (bottom plate), 18 ... Seat back, 2
0 ... Support belt, 20a, 20b ... Half of the support belt,
21 ... Connecting tool, 23 ... Belt guide, 23a ... Slit, 23b ... Opening part, 28 ... Central cushion, 29a,
29b ... Half of hook and loop fastener, 30 ... Winding device, 35 ...
Reverse rotation prevention mechanism, 40 ... Seat belt.

Claims (5)

[Claims] 1. A vehicle seat comprising a seat cushion and a seat back which rises upward from a rear end of the seat cushion, and a recess formed in an upper surface of a center of a rear half of the seat cushion and both ends of a frame of the seat cushion. A flexible support belt provided so as to be in two states: a tension state in which the ridge is attached and stretched in a substantially parallel manner with the bottom surface of the recess, and a relaxed state in which the pendant is freely hung in the recess. And a cushion for covering a flexible pad, and a central cushion that is approximately the same thickness as the depth of the recess and can be inserted into the recess substantially without a gap. Sheet. 2. The automobile for adults and children as claimed in claim 1, wherein one half and the other half of the surface fasteners engaging with each other are provided on the lower surface of the central cushion and the upper surface of the support belt, respectively. Sheet. 3. The support belt is divided into two halves at an intermediate portion inside the recess, and a connecting tool for detachably connecting the respective halves is provided between the two halves, and the connecting tools are engaged and connected. 3. The seat for an adult / children's automobile according to claim 1 or 2, wherein the tensioned state is brought into the tension state and the relaxation state is brought into the relaxed state. 4. The frame is supported by a winding device in which one end of the support belt is rotatable in a winding direction but is prevented from rotating in a rewinding direction by a reverse rotation preventing mechanism. The device is attached to a device, and is wound by the winding device to bring the tension state, and the reverse rotation preventing mechanism is detached and rewound to bring the device into the relaxed state. Car seat for adults and children. 5. A belt guide having an oblong slit and an opening formed at one end thereof for allowing the seat belt to be inserted and removed is provided on at least one side of a rear portion of the recess on the upper side of the seat cushion. Attached via a strap so as to be exposed at
The automobile seat for adults and children according to claim 4.