Child seat

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to an impact energy absorption mechanism of a child seat.

【0002】

[Conventional technology]

As a child seat that is fixed to the seat of a vehicle such as an automobile and devised for the purpose of reducing the injury of infants in the event of a traffic accident, as shown in FIG. 3, an emergency automatic lock is applied to the back surface of the seat 11 of the child seat body 10. A child seat with an emergency automatic lock type belt winding device, which is equipped with a type belt winding device 20 and locks the seat belts 30 and 40 only when a shock such as a sudden brake is detected, is known. In FIG. 3, reference numeral 50 is a front guard body, 60 is a left tongue member through which the seat belt 30 on the left side of the drawing is inserted and is detachably locked to the front guard body 50, and 70 is a seat belt 40 on the right side. Each represents a right tongue member that is inserted and removably locked to the front guard body 50. In addition, 30A and 40A are the parts of the left seat belt 30 and the right seat belt 40 that are arranged on the shoulder side of the infant 100, and 30B and 40B are the legs of the infant 100 of the left seat belt 30 and the right seat belt 40, respectively. Each part is represented on the side of. In addition, 12 is the backrest portion of the child seat body 10, 13 and 14 are the left belt insertion hole and the right belt insertion hole formed in the backrest portion 12 of the child seat body 10, respectively, and 30C and 40C are the left seat belt 30 and the right seat belt, respectively. Of 40, the portion arranged on the back side of the backrest portion 12, 21 is the belt on the belt winding device 20 side, 22 is provided at the end of the belt winding device side belt 21, and the left seat belt 30 and the right seat belt 40 are provided. Represents a connector to which each end of the is connected.

【0003】

In the child seat configured in this way, the emergency automatic lock type belt take-up device 20 locks the belt 21 when it detects a shock such as sudden braking, and when this belt 21 is locked, the left seat belt 30 and the right seat belt 40 are locked together and 100 toddlers are fastened in the child seat.

【0004】

[Problems to be Solved by the Invention]

However, according to the conventional child seat with an emergency automatic lock type belt take-up device, when a large impact energy is applied to the child seat due to a vehicle collision, the belt take-up device 20 operates and the left seat belt 30 and the right seat belt 40 are fastened at the same time. Since it is locked, there is a problem that the infant 100 is hit hard by the tension of the seat belts 30 and 40.

【0005】

The present invention is not limited to the child seat having the emergency automatic lock type belt winding device as described above, but can also be applied to a child seat of a type in which the end portion of the seat belt is directly fixed to the child seat seat body. In view of the above problems, it is an object of the present invention to provide a child seat capable of reducing the impact that an infant receives from a seat belt in the event of a vehicle collision.

【0006】

[Means for solving problems]

The child seat according to claim 1 is a child seat provided with a fixing means for fixing the end portion of the seat belt directly to the child seat body or via an emergency automatic lock type belt winding device, and the impact energy exceeding a predetermined value due to a vehicle collision is applied. It is characterized by providing an impact energy absorbing means that enables the fixing means to move in a direction of loosening the tension of the seat belt when the fixing means is joined.

【0007】

The child seat according to claim 2 is the child seat according to claim 1, wherein the impact energy absorbing means is composed of a thin portion that can be broken by the fixing means.

【0008】

The child seat according to claim 3 is the child seat according to claim 2, wherein the thin-walled portion is formed on a seat portion of the child seat body.

【0009】

INDUSTRIAL APPLICABILITY

According to the child seat of claim 1, when an impact energy exceeding a predetermined value due to a vehicle collision is applied to the fixing means, the fixing means moves in the direction of loosening the tension of the seat belt, so that the seat belt loosens and the infant seats. The impact from the belt is mitigated.

【0010】

According to the child seat of claim 2, when an impact energy exceeding a predetermined value due to a vehicle collision is applied to the fixing means, the thin portion is broken by the fixing means, so that the fixing means moves in the direction of loosening the tension of the seat belt. Therefore, it is possible to reduce the impact energy received by the infant with an extremely simple configuration.

【0011】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

【0012】

FIG. 1 is a notched cross-sectional view of a child seat with an emergency automatic lock type belt winding device (hereinafter, simply referred to as ELR) according to an embodiment when viewed from the right side, and FIG. 2 is a child seat seat portion shown in FIG. It is a top view which shows the main part of. In addition, in FIG. 1 and FIG. 2, the same code as the code shown in FIG. 3 represents the same code as that represented by the code shown in FIG.

【0013】

In FIGS. 1 and 2, the child seat with ELR according to the present embodiment has a recess 80 at a substantially central position of the surface 11a of the child seat seat portion 11. The recess 80 is composed of a deep bottom portion 81 and a shallow bottom portion 82, the deep bottom portion 81 is located at the center, and the shallow bottom portion 82 is located at the peripheral edge thereof. The deep bottom portion 81 is composed of a thin portion that is thinner than the shallow bottom portion 82, and is formed so as to be elongated in the direction from the front to the rear of the child seat. A vertical through hole 81a through which the bolt 90 is inserted is formed at the front end of the child seat in the deep bottom portion 81.

【0014】

ELR20 is attached to the child seat body 10. Explaining how to attach the ELR20 to the child seat body 10, the bolt 90 inserted into the washer 91 from above through the through hole 81a of the deep bottom portion 81 is inserted from above into the through hole 81a of the deep bottom portion 81, and the bolt 90 The male screw portion 90a is screwed into the screw hole 20b of the mounting plate 20a of the ELR 20 arranged on the back surface 11b of the seat portion 11. As a result, the ELR 20 is fixed to the back surface 11b of the seat portion 11. Reference numeral 11c in FIG. 1 is a member located on the left side (meaning the left side when the child seat is used as a reference) among the pair of ELR positioning members provided on the back surface of the seat portion 11, and is designated by ELR20. On the other hand, positioning is performed in the left-right direction.

【0015】

When the ELR20 is attached to the child seat body 10, the outer diameter of the washer 91 is set larger than the width of the deep bottom portion 81 in the lateral direction, and the head 90b of the washer 91 and the bolt 90 is the shallow bottom portion. Located on the bottom of 82. Further, the shallow bottom portion 82 has a depth larger than the total value of the thickness of the washer 91 and the thickness of the bolt head 90b, and the bolt head 90b does not protrude above the surface 11a of the seat portion 11. When the child seat body 10 is covered with a cover (not shown), the bolt head 90b does not become a protrusion and makes the infant's tail feel uncomfortable.

【0016】

In the child seat with ELR configured as described above, the ELR 20 locks the left seat belt 30 and the right seat belt 40 via the belt 21 when a sudden brake or the like is detected. The locks on the seat belts 30 and 40 allow the infant 100 to stay in the child seat. At this time, a load is applied to the ELR 20 in the direction from the front to the rear of the child seat due to the load received by the seat belts 30 and 40 when the infant 100 is fastened in the child seat. When this load corresponds to the impact energy exceeding a predetermined value due to a vehicle collision (for example, the impact energy exceeding the impact energy value generated when a vehicle at a speed of 50 km / h collides), the male screw portion 90a of the bolt 90 has a thin wall. The ELR20 is formed by breaking the deep bottom portion 81 consisting of the parts and moving toward the back of the seat portion 11 as shown by the alternate long and short dash line in FIG. Move toward the rear of the child seat. When the ELR20 moves toward the rear of the child seat, the belt 21, the left seatbelt 30 and the right seatbelt 40 loosen by the movement distance of the ELR20 as shown by the two-dot chain line shown in Fig. 1, and the belts 21, 30, 40 Due to the loosening of the belt, the impact energy received by the infant 100 is mitigated. The deep bottom portion 81 of the recess 80 of the seat portion 11 corresponds to the thin-walled portion as an impact energy absorbing means.

【0017】

As described above, according to the child seat of this embodiment, when an impact energy exceeding a predetermined value due to a vehicle collision is applied to the fixing means (bolt 90), the thin portion (deep bottom portion 81 of the recess 80) becomes the fixing means (bolt 90). ), Therefore the fixing means (bolt 90) moves in the direction of loosening the tension of the seat belts 30 and 40. Therefore, it is possible to reduce the impact energy received by the infant with an extremely simple configuration.

【0018】

Although not shown, the present invention does not include an emergency automatic lock type belt take-up device, and simply fixes the end of the seat belt directly to the child seat body by fixing means (bolts, nuts, etc.). It can also be applied to a type of child seat, and in this case, the impact energy absorbing means is configured by forming a thin-walled portion that can be broken by the fixing means on the seat portion of the child seat body as in the above embodiment.

[Simple explanation of drawings]

[Figure 1]

Notched cross-sectional view of a child seat with an emergency automatic lock type belt take-up device according to an embodiment when viewed from the right side. [Figure 2]

Top view showing the main part of the child seat seat shown in FIG. [Fig. 3]

Schematic front view of a child seat with an emergency automatic lock type belt take-up device [Explanation of symbols]

10 Child seat body 11 Seat 20 Emergency automatic lock type belt take-up device 81 Deep bottom part (impact energy absorption means, thin wall part) 90 volt (fixing means)