JP2002316565A - Child seat fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a child seat at a vehicle seat in a state to reliably remove looseness of webbing without needing special operation. SOLUTION: A pair of interference part 38 are formed on the back of a child seat body 22. Meanwhile, a tension plate 58 is rockably mounted on a base 20. When the child seat body 22 is inclined frontward around a guide roller 34 serving as a fulcrum, the tension plate 58 is brought into a standing up state. With this state, the base 20 is temporarily fixed at the vehicle seat 12 by using webbing 26. Thereafter, when, by rotating the child seat body 22 in an opposite direction, the child seat body is mounted on the base 20, the tension plate 58 is rocked by the interference part 38, the webbing 26 is pressed down to the bottom side of the base 20 to remove looseness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a child seat fixing structure which is applied to a child seat including a base and a child seat main body and fixes the base on a vehicle seat using webbing of a seat belt device. .

[0002]

2. Description of the Related Art When an infant rides, it is obligatory to attach a child seat. For this reason, the customer's interest in the child seat is higher than before, and there are many required items such as reliability, operability, and low price.

By the way, many conventional child seats are fixed to a vehicle seat using a three-point seat belt device. In this type of child seat, there is a possibility that the child seat is fixed to the vehicle seat with the webbing loosened. Therefore, if possible,
Regardless of whether the user's point is good or bad, with or without power,
It is desirable to develop a child seat fixing structure capable of uniformly eliminating the slack of the webbing.

The present invention has been made in view of the above background, and has a child seat fixing structure capable of fixing a child seat to a vehicle seat in a state where slack of webbing is securely removed without requiring any special operation. The goal is to obtain

[0005]

According to a first aspect of the present invention, a child seat fixing structure according to the present invention is mounted on a vehicle seat, and has load portions on both sides of which a webbing of a seat belt device is stretched. Applied to a child seat configured to include a base and a child seat body capable of being in any of a mounted state and a non-mounted state with respect to the base, and at least one of the base and the child seat body, When the child seat body is mounted on the base, the webbing located between the pair of load portions is pressed against the base bottom side, thereby providing slack removing means for removing slack of the webbing. .

According to a second aspect of the present invention, in the child seat fixing structure according to the first aspect, the slack removing means is provided on the base so as to be swingable about a support shaft, and is provided between the pair of load portions. Webbing pressing means capable of pressing down the webbing located on the bottom side of the base, provided on the back side of the child seat body, when the child seat body is mounted on the base,
Interfering means for interfering with the webbing pressing means and pressing the webbing pressing means toward the base bottom surface.

According to a third aspect of the present invention, in the child seat fixing structure according to the second aspect of the present invention, when the child seat main body is not attached to the base, the pushing-down means is in an upright state, and is connected to the load portion. It is characterized in that a gap portion through which the webbing can be inserted is formed.

According to a fourth aspect of the present invention, in the child seat fixing structure according to the second or third aspect, the child seat body is configured to be reclineable with respect to the base, and further, a reclining angle is provided. Irrespective of the above, the interfering means interferes with the webbing press-down means such that the swing angle of the webbing press-down means is constant or substantially constant.

According to the first aspect of the present invention, first, the child seat body is not mounted on the base, and the base is mounted on the vehicle seat. Next, the webbing of the seatbelt device is stretched over load portions provided on both sides of the base, and is temporarily fixed. In this temporarily fixed state, the webbing may be slightly loosened due to individual differences in the fixing work of the user.

Next, the child seat body is mounted on the base. In the present invention, at this time, the webbing located between the pair of load portions is pressed toward the base bottom surface by the slack removing means. Therefore, tension can be applied to the webbing located between the pair of load portions by a simple and uniform operation of changing the child seat main body from the non-mounted state to the mounted state with respect to the base.

According to the second aspect of the present invention, first, the child seat body is not mounted on the base, and then the base is mounted on the vehicle seat. At this time, it may be either manual or automatic, but by swinging the webbing pressing means provided on the base around the support shaft, a gap is formed between the load portion and the webbing pressing means. deep. Then, in this state, the webbing of the seatbelt device is stretched over the load portions provided on both sides of the base, and once fixed. In this temporarily fixed state, as described above, the webbing may be slightly loosened due to individual differences in the fixing work of the user and the like.

Next, the child seat body is mounted on the base. In the present invention, the interference means is provided on the rear side of the child seat body, and when the child seat body is mounted on the base, the interference means interferes with the webbing pressing means, and the webbing pressing means presses against the base bottom side. Is done. For this reason, the webbing pressing means swings around the support shaft and presses the webbing located between the pair of load portions toward the base bottom surface. Therefore, tension can be applied to the webbing located between the pair of load portions by a simple and uniform operation of changing the child seat main body from the non-mounted state to the mounted state with respect to the base.

In the present invention, the slack removing means includes the webbing depressing means provided on the base side and the interference means provided on the child seat body side, so that the function of the slack removing means is provided on the base side. And the child seat body side.

According to the third aspect of the present invention, when the child seat body is not mounted on the base, the pressing means is in an upright state, and a gap is formed between the pair of load portions so that the webbing can be inserted. Therefore, there is no need to manually swing the pressing means around the support shaft to form a gap between the pair of load portions.

According to the fourth aspect of the present invention, since the child seat main body can be reclined with respect to the base, when the child seat is normally reclined, the interference means is relatively displaced with respect to the pressing means. The swing angle of the pressing means changes. Accordingly, the tension acting on the webbing located between the pair of load portions varies. However, according to the present invention, regardless of the reclining angle, the interference means interferes with the webbing press-down means so that the swing angle of the webbing press-down means becomes constant or substantially constant, so that such variation does not occur. .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A child seat 10 to which a child seat fixing structure according to the present invention is applied will be described below with reference to FIGS.

FIG. 1 shows a side view of a state in which a child seat 10 according to the present embodiment is fixed to a vehicle seat 12. As shown in this figure, the vehicle seat 12 includes a seat cushion 14 on which an occupant sits, a seatback 16 disposed at the rear end of the seat cushion 14 so as to be tiltable, and an upper end of the seatback 16. The headrest 18 is provided so as to be adjustable in height.

On the other hand, the child seat 10 is configured to be placed on the seat cushion 14 of the vehicle seat 12 and to be able to be mounted or not mounted on the base 20. And the child seat body 22.

The above-described child seat 10 is fixed to the vehicle seat 12 using a three-point seat belt device 24. The three-point seat belt device 24 includes a webbing 26 for restraining an occupant, an anchor plate (not shown) which is fixed to the lower side of the center pillar room or the vehicle body floor and one end of the webbing 26 is locked, and a lower portion of the center pillar. A webbing take-up device (not shown) that is disposed and winds the other end of the webbing 26 in a layered manner by urging force;
The webbing 26 is provided on the center pillar upper room side.
And a tongue plate (not shown) movably inserted into an intermediate portion of the webbing 26, and a vehicle seat 1
And a buckle device (not shown) which is erected near the inner side of the second member 2 and is engaged with the tongue plate.

When an adult occupant sits on the vehicle seat 12 and uses the seatbelt device 24, the tongue plate is engaged with the buckle device to bring the three-point seatbelt device 24 into a webbing mounted state. be able to. That is, the webbing of the portion from the shoulder anchor to the tongue plate becomes the webbing on the shoulder side, and the webbing of the portion from the tongue plate to the anchor plate becomes the webbing on the lap side, and the occupant is restrained. Note that FIG. 1 does not show a case where an adult occupant sits on the vehicle seat 12 but a child seat 10.
The case of fixing is depicted.

Here, a specific structure of the above-described child seat 10 will be described.

As shown in FIGS. 2 to 4, a child seat body 22 constituting one of the child seats 10 is provided.
Has a shell structure, and includes a seat cushion portion 30 on which a child sits, and a seat back portion 32 integrated with the seat cushion portion 30 and supporting the upper body of the child.

A pair of left and right guide rollers 34 is provided on the lower surface side of the seat cushion portion 30. A guide pin 36 that projects in the width direction of the child seat 10 is provided on the upper back side of the seat back portion 32. These guide rollers 34 and guide pins 36
It is provided so that the child seat body 22 can be reclined with respect to the base 20.

Further, a pair of interference portions 38 as "slack removing means" and "interference means" formed substantially in a trapezoidal shape in a side view are formed on the back side of the lower end portion of the seat back portion 32. The pair of interference portions 38 is a child seat 1
A pair is formed at an intermediate portion in the width direction of 0 at a predetermined interval (see FIG. 6).

The base 20, which constitutes the other side of the child seat 10, is a seat cushion 14 of the vehicle seat 12.
A seat cushion support portion 40 mounted on the upper portion and supporting the seat cushion portion 30 of the child seat body 22
And a seat back support portion 42 pressed against the seat back 16 of the vehicle seat 12 and supporting the seat back portion 32 of the child seat body 22.

Step portions 44 are formed on both sides of the seat cushion support portion 40, and long guide rails 46 are respectively attached by fixtures such as bolts (not shown). The pair of guide rails 46
The guide roller 3 of the child seat body 22 described above
The child seat 4 is rotatably accommodated so that the child seat body 22 can be moved relative to the base 20 in the vehicle front-rear direction. The guide roller 34 is regulated by a stopper (not shown) so as not to roll beyond the front end position of the guide rail 46.

On both sides of the upper portion of the seat back support portion 42, holding plates 50 each having a substantially L-shaped guide groove 48 formed in a side view are provided. The guide groove 48 includes a vertical groove 48A whose longitudinal direction is the height direction of the base 20 and a lateral groove 4A whose longitudinal direction is the thickness direction of the base 20.
8B. The groove width of the guide groove 48 is the guide pin 36 on the side of the child seat body 22 described above.
The guide pin 36 is movable within the guide groove 48.

Although the detailed configuration is not shown, the guide pin 36 of the child seat main body 22 is generally urged in the extending direction by a spring, and the guide pin 36 is pulled by an occupant by pulling the operation unit. 36
Is the child seat body 2 against the urging force of the spring.
2 so as to be retracted. On the other hand, the vertical groove 4 of the guide groove 48 is provided on the holding plate 50 side of the base 20.
8A, engagement holes are formed at appropriate intervals according to the reclining angle, and the guide pin 36 is selectively engaged in the engagement hole, whereby the relative mounting position of the child seat body 22 with respect to the base 20 is increased. The configuration is changed and reclined accordingly.

On both sides of the base 20, a pair of left and right inclined portions 52 inclined at a predetermined angle are formed at intersections of the seat cushion support portion 40 and the seat back support portion 42, respectively. FIG.
As shown in FIG. 1, a webbing guide 54 as a “load portion” into which the webbing 26 is inserted is mounted.
The webbing guide 54 is formed with a restricting portion 54A through which the webbing 26 can be inserted and which restricts the inserted webbing 26 from being unnecessarily displaced in the inclination direction of the inclined portion 52. Deformable resin claws 54
B are formed respectively. These resin claws 54B
The webbing guide 54 is fitted to the inclined portions 52 on both sides of the base 20 from above so that the webbing guide 54 is elastically deformed and is engaged with the engaged portion 56 formed integrally with the base 20. Has become.

At substantially the center of the seat cushion support portion 40 of the base 20, a tension plate 58 as "slack removing means" and "pressing means" is provided. As shown in FIGS. 5 and 6, the tension plate 58 has a predetermined length along the width direction of the base 20, and has a substantially lever shape when viewed from the side. The tension plate 58 includes, as main components, a main body 60 having a predetermined height, a load receiving portion 62 provided on the front side of the main body 60 and contacting the interference portion 38 of the child seat main body 22. A pressing portion 64 provided on the back side of the main body 60 and positioned between the pair of webbing guides 54 to apply a predetermined tension to the webbing 26. ing. The tension plate 58 is reinforced as necessary by a plurality of ribs 66 (see FIG. 6).

At the lower end of the tension plate 58, a hollow cylindrical support portion 68 whose axial direction is the width direction of the base 20 is integrally formed. Further, at the lower end of the tension plate 58, a swing restricting portion 70 is integrally extended in a direction orthogonal to the main body 60.

The above-described tension plate 58 is swingably supported by a support member 72 fixed to the bottom surface of the seat cushion support portion 40 of the base 20. The support member 72 is fixed to the bottom surface of the base 20 and serves as a base 7.
4, a pair of support flanges 76 erected from both ends of the base 74 in the longitudinal direction, and a stopper 78 formed at an intermediate portion of the base 74 in the longitudinal direction.

A shaft 80 whose axial movement is restricted (retained) by a retaining ring is inserted through the pair of support flanges 76. The shaft support portion 68 of the tension plate 58 is inserted into the shaft 80. Thus, the tension plate 58 is supported by the support member so as to swing around the shaft 80.

A torsion coil spring 82 which is grasped as "biasing means" including a leaf spring and a spring in a broad sense is wound around the outer periphery of the shaft support portion 68. One end of the torsion coil spring 82 is abutted and locked on the base 74 of the support member 72, and the other end is locked on the back surface of the lower end of the tension plate 58. Accordingly, the torsion coil spring 82 moves the tension plate 58 to the inclined position (the position shown by the solid line in FIG. 5 and the positions shown in FIGS. 1, 3, and 4).
(The position shown in FIG. 5) to return to the standing position (the position shown in the two-dot chain line in FIG. 5 and the position shown in FIG. 2).
When the tension plate 58 reaches the upright position, the swing restricting portion 70 of the tension plate 58 comes into contact with the stopper 78 of the support member 72, so that the tension plate 58 is further rotated in the upright position direction. Are being regulated.

The load receiving portion 62 of the tension plate 58 is connected to the pair of interference portions 3 of the child seat body 22.
8 (see FIG. 6). Therefore, when the child seat body 22 rotates around the guide roller 34, the pair of interference portions 38 comes into contact with the load receiving portion 62 of the tension plate 58. Further, in the present embodiment, the child seat body 22 is
The rear surface 38 of the interference portion 38 is so arranged that the relative interference (contact) position between the interference portion 38 and the load receiving portion 62 hardly changes when reclining.
The shape and the positional relationship between A and the load receiving portion 62 are set.

Next, the operation and effect of this embodiment will be described.

The child seat 10 having the above structure is fixed to the vehicle seat 12 as follows.

First, the child seat body 22 is not mounted on the base 20. That is, as shown in FIG. 2, after the child seat main body 22 is reclined to the lowest position, the child seat main body 22 is rotated in the direction of arrow A with the guide roller 34 as a fulcrum. As a result, the guide pin 36 is
The seat back portion 32 of the child seat body 22 is separated from the seat back support portion 42 of the base 20 through the lateral groove 48B.

Along with this, the pair of interference portions 38 formed on the back surface of the lower end portion of the seat back portion 32 are also rotated in the same direction, so that the tension plate 58 is raised by the urging force of the torsion coil spring 82 (in the direction of the arrow). (B direction). As a result, the tension plate 58 and the base 2
A predetermined gap 84 is formed between the sloping portion 52 and the zero inclined portion 52.
Then, the webbing 26 is passed through the pair of webbing guides 54 using the gap 84 and a tongue plate (not shown) is engaged with the buckle device, whereby the base 20 is temporarily fixed on the vehicle seat 12. . In this temporarily fixed state, the webbing 26 may be slightly loosened due to individual differences in the fixing work of the user.

Next, the child seat body 22 is mounted on the base 20. That is, the child seat body 22 is rotated in the direction opposite to the direction of arrow A from the state shown in FIG. As a result, the guide pin 36 is inserted into the lateral groove 48B of the guide groove 48, and the child seat body 22 is mounted on the base 20 at the reclined lowermost position.

Here, with the mounting movement of the child seat body 22, the pair of interference portions 38 are also rotated in the same direction. For this reason, while the pair of interference portions 38 is in contact with the load receiving portion 62 of the tension plate 58, the tension plate 58 is tilted around the shaft 80 in the direction of the tilt position (arrow B).
In the opposite direction). As a result, the webbing 26 located between the pair of webbing guides 54 is pressed down to the bottom surface side of the base 20 by the pressing portion 64 of the tension plate 58. Thereby, a predetermined tension is applied to the webbing 26 located between the pair of webbing guides 54, and the slack of the webbing 26 is eliminated.

As described above, in the child seat fixing structure according to this embodiment, the pair of interference portions 38 are provided on the rear side of the child seat body 22 and the webbing 26 is pressed against the base 20 by the pair of interference portions 38. Tension plate 58 that pushes down to the bottom side
Provided, the child seat body 22 is
The tension can be applied to the webbing 26 located between the pair of webbing guides 54 by a simple and uniform operation of changing from the non-mounting state to the mounting state. As a result, according to the present embodiment, the child seat 10 can be fixed to the vehicle seat 12 in a state where the slack of the webbing 26 is securely removed without requiring any special operation.

Further, in the child seat fixing structure according to the present embodiment, a structure for removing the slack of the webbing 26 by the tension plate 58 provided on the base 20 side and the pair of interference portions 38 provided on the child seat body 22 side. Since this is established, the function of the slack removing means can be shared between the base 20 side and the child seat body 22 side. As a result, according to the present embodiment, it is possible to reduce the size of the slack removing means and, consequently, to reduce the size of the entire child seat 10 as compared with a structure in which all the functions are provided on either the base 20 or the child seat body 22 side. Can be.

Further, in the child seat fixing structure according to the present embodiment, the base 2 of the child seat main body 22 is provided.
At the time of non-mounting, the tension plate 58 is in an upright state, and a gap 84 is formed between the pair of webbing guides 54 so that the webbing 26 can be inserted. It is no longer necessary to form a gap 84 between the pair of webbing guides 54 by moving them. As a result, according to the present embodiment, the labor of manually swinging the tension plate 58 around the shaft 80 can be omitted, and the operability when fixing the child seat can be improved.

In the child seat fixing structure according to the present embodiment, the child seat body 22 is
Is normally reclined, the reclining causes the pair of interference portions 38 to be relatively displaced with respect to the tension plate 58, so that the swing angle of the tension plate 58 changes. Accordingly, the webbing 26 positioned between the pair of webbing guides 54
There is a variation in the tension acting on the surface. However, in the present embodiment, as shown in FIGS. 3 and 4, regardless of the reclining angle, the tension plate 5
8 so that the swinging angle of the interference part 8 is constant or substantially constant.
Interferes with the tension plate 58 (relatively changes the contact position), so that such variation does not occur. As a result, according to the present embodiment, the stability of the state in which the child seat 10 is fixed to the vehicle seat 12 can be enhanced.

In the above-described embodiment, as shown in FIG. 2, the child seat body 22 is supported by the seat back support portion 42 of the base 20 with the guide roller 34 as a fulcrum.
The configuration in which the child seat body 22 is completely detached from the base 20 is not limited to the configuration in which the child seat body 22 is completely detached from the base 20. Good.

In the above-described embodiment, the tension plate 58 is automatically returned by the torsion coil spring 82. However, the present invention is not limited to this, and the torsion coil spring 82 may be omitted and a manual type may be used.

Further, in the above-described embodiment, the configuration in which the pair of interference portions 38 are provided on the child seat body 22 side and the tension plate 58 is provided on the base 20 side (configuration for sharing functions) is adopted. Alternatively, a configuration in which the slack removing means is provided on only one of the child seat body 22 and the base 20 may be adopted. For example, without providing the tension plate 58 on the base 20,
It is possible to push the webbing 26 located between the pair of webbing guides 54 to the bottom side of the base 20 to some extent by changing the shape of the pair of interference portions 38 and dimensions such as the protruding length.

[0049]

As described above, the child seat fixing structure according to the first aspect of the present invention has a structure in which at least one of the base and the child seat main body has a pair of load portions when the child seat main body is mounted on the base. Since the slack removing means for removing the slack of the webbing is provided by pressing the webbing located therebetween to the base bottom side, the child seat body is easily and uniformly changed from the non-mounted state to the mounted state with respect to the base. Tension can be applied to the webbing located between the pair of load portions by a simple operation, and as a result, the child seat is fixed to the vehicle seat in a state where the slack of the webbing is securely removed without requiring a special operation. It has an excellent effect that it can be performed.

According to a second aspect of the present invention, in the child seat fixing structure according to the first aspect of the present invention, the webbing is provided on the base so as to be swingable around the support shaft, and the webbing positioned between the pair of load portions is provided on the base bottom surface. Webbing press-down means that can be pressed down to the side, and provided on the back side of the child seat body, when the child seat body is mounted on the base, interferes with the webbing press-down means and causes the webbing press-down means to be placed on the bottom of the base. Since the slack removing means is configured to include the interference means that presses to the side, the functions can be shared between the base side and the child seat body side, and as a result, the structure in which one of the functions bears all functions On the other hand, there is an excellent effect that the size of the slack removing means can be reduced, and thus the size of the entire child seat can be reduced.

According to a third aspect of the present invention, in the child seat fixing structure according to the second aspect of the present invention, when the child seat main body is not mounted on the base, the pressing means is in an upright state, and webbing is provided between the child seat body and the load portion. Is formed so as to form a gap portion through which the insertion can be made, so that it is possible to eliminate the trouble of manually swinging the pressing means around the support shaft, and as a result, it is possible to improve the operability when fixing the child seat. Having.

According to a fourth aspect of the present invention, in the child seat fixing structure according to the second or third aspect, the child seat main body is configured to be reclineable with respect to the base, and further, regardless of the reclining angle. Instead, the interference means interferes with the webbing press-down means so that the swing angle of the webbing press-down means is constant or substantially constant, so that the tension acting on the webbing located between the pair of load parts varies. This can be prevented or reduced, and as a result, there is an excellent effect that the stability of the state in which the child seat is fixed to the vehicle seat can be enhanced.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a child seat according to an embodiment is fixed to a vehicle seat.

FIG. 2 is a side view when the child seat body is tilted forward with respect to a base and is in a non-mounted state.

FIG. 3 is a side view when the child seat body is mounted on a base and reclined to a lowermost position.

FIG. 4 is a side view when the child seat body is mounted on a base and reclined to a highest position.

FIG. 5 is a side view showing the operation of the tension plate.

FIG. 6 is a rear view showing the operation of the interference unit and the tension plate as viewed from the direction of arrow P in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Child seat 12 Vehicle seat 20 Base 22 Child seat main body 24 Seat belt device 26 Webbing 34 Guide roller 36 Guide pin 38 Interference part (slack removal means, interference means) 46 Guide rail 48 Guide groove 54 Webbing guide (loading part) 58 Tension plate (Loosening means, pressing means) 80 Shaft (support shaft) 84 Gap (gap)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenji Hoshino 3-260 Toyota, Oguchi-cho, Niwa-gun, Niwa-gun F-term in Tokai Rika Electric Works, Ltd. 3B087 CE07 DE10

Claims (4)

[Claims] 1. A base mounted on a vehicle seat and provided with load portions on both sides of which a webbing of a seat belt device is stretched, respectively, in a mounted state and a non-mounted state with respect to the base. And a child seat body adapted to be capable of being applied to a child seat configured to include at least one of a base and a child seat body.
When the child seat body is mounted on the base, the webbing located between the pair of load portions is pressed against the bottom surface of the base to provide a slack removing means for removing the slack of the webbing. Child seat fixing structure. 2. The slack removing means is provided on the base so as to be swingable about a support shaft, and is capable of pushing down a webbing located between a pair of load portions to a base bottom surface side; Interfering means provided on the rear side of the child seat main body and interfering with the webbing pressing means to press the webbing pressing means toward the base bottom side when the child seat body is mounted on the base. The child seat fixing structure according to claim 1, wherein the child seat fixing structure is configured. 3. The device according to claim 1, wherein the pressing means is in an upright state when the child seat body is not mounted on the base, and forms a gap through which the webbing can be inserted with the load section. 2. The child seat fixing structure according to 2. 4. The child seat main body is configured to be reclineable with respect to the base, and furthermore, irrespective of the reclining angle, the swing angle of the webbing press-down means is constant or substantially constant. The child seat fixing structure according to claim 2 or 3, wherein the interference unit interferes with the webbing pressing unit.