JPH06286511A - Web adjuster for child seat - Google Patents

Abstract

PURPOSE:To provide a web adjuster for a child seat, by which return of a fastening webbing is checked very surely. CONSTITUTION:A cam 52 is pivoted on a pin 54 in a case 50. The cam 52 is provided with plural projections 58 for biting and stopping a fastening webbing 30 with a webbing pressing wall 56 of the case 50. An arm part 60 for turning the cam 52 in the direction of clamping the fastening webbing 30 is projected on the cam 52. A coiled spring 62 wound round the pin 54 energizes the cam 52 in the direction of clamping the webbing. A tension member 64 for turning the cam 52 in the opposite direction to the web clamping direction is connected to the cam 52. Accordingly, the webbing can be clamped very surely, so as to protect a child seated on a child seat very surely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web adjuster for locking the occupant protection webbing of a child seat by adjusting its length.

[0002]

2. Description of the Related Art An example of a child seat belt device for a child seat will be described with reference to FIG. The base end of the strap 14 is fixed to the center of the front edge of the seat 12 of the child seat 10, and the buckle 16 is attached to the tip of the strap 14. The tongues 22 and 24 are attached to the right webbing 18 worn on the right half of the child sitting on the child seat 10 and the left webbing 20 worn on the left half of the child, respectively.
2, 24 are inserted into the buckle 14 and locked.

The front ends of the webbings 18 and 20 are fixed to the rear portion of the seat portion 12. Webbing 18, 2
The rear end side of 0 is from the swallowing openings 26, 28 of the backrest 25 of the child seat 10 to the backrest 25 of the child seat 10.
And is connected to the base end portion of the tightening webbing 30 in the backrest portion 25.

The front end 30a of the tightening webbing 30 passes through the inside of the seat portion 12 and the outlet 3 on the front surface of the child seat 10.
It is pulled out from the child seat 10 from 2. A web adjuster 34 for locking the fastening webbing 30 is provided in the seat portion 12 of the child seat 10.

A conventional example of the web adjuster 34 will be described with reference to FIG.

A cam 40 is inserted into the case 36 by a pin 38.
Is pivotally supported. The cam 40 holds the tightening webbing 30 between it and the webbing retaining wall 42 to prevent movement in the direction of arrow B in FIG.
A plurality of ridges 44 are provided on the surface facing the surface 2. The cam 40 is biased in the webbing holding direction by a coil spring 46 wound around the pin 38. Cam 40
A pulling member 48 is connected to. This tension member 48
By pulling in the direction of arrow C
2, the tightening webbing 30 can be moved not only in the arrow A direction but also in the B direction.

When the tip 30a of the tightening webbing 30 is pulled by hand, the cam 40 rotates clockwise in FIG. 5 to move the tightening webbing 30 in the A direction, and the left and right webbing 1
8 and 20 are drawn into the swallows 26 and 28, and the looseness of the webbing 18 and 20 is removed. When the hand is released from the tip 30a, the fastening webbing 30 is bitten between the cam 40 and the pressing wall 42 in this state, so that the webbing 1
The return of 8 and 20 is blocked and the child sitting in the child seat 10 is well protected.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a web adjuster for a child seat, which is capable of strongly sandwiching a fastening webbing between a pressing wall and a cam, thereby reliably preventing the fastening webbing from returning. The purpose is to

[0009]

A web adjuster for a child seat according to the present invention is a cam that is rotatable about a pivot and is provided with a webbing contact surface having a plurality of ridges for holding the webbing. A case that pivotally supports the cam, a webbing pressing wall that is provided on the case and faces the webbing contact surface of the cam, and the webbing contact surface rotates in a direction in which the webbing contact surface overlaps the webbing press wall. In a child seat web adjuster comprising a spring for urging the cam to move, an arm portion that is pressed by the tension of the webbing that is tensioned and that rotates the cam in the webbing biting direction. It is characterized in that the cam is provided so as to project.

[0010]

In the child seat web adjuster of the present invention, the webbing presses the arm portion, so that the webbing is strongly clamped between the cam and the pressing wall.

[0011]

1 is a sectional view of a web adjuster for a child seat according to an embodiment, FIG. 2 is a perspective view of a cam, and FIG.
The figure is a perspective view of the case.

A cam 52 is pivotally supported in the case 50 by a pin 54. Webbing retainer wall 56 of case 50
The cam 52 is provided with a plurality of ridges 58 for holding the tightening webbing 30 between and. An arm portion 60 for rotating the cam 52 in a direction in which the tightening webbing 30 is sandwiched is provided so as to project from the cam 52. A coil spring 62 wound around the pin 54 urges the cam 52 in the webbing holding direction. The tension member 64 for rotating the cam 52 in the direction opposite to the webbing holding direction is provided with the cam 5.
It is connected to 2.

In the child seat web adjuster having such a structure, when the tightening webbing 30 is sandwiched between the cam 52 and the pressing wall 56, a tensile stress is applied to the tightening webbing 30 in the direction of arrow B. When added, the tightening webbing 30 causes the tip of the arm portion 60 to move toward the arrow D.
The cam 52 tries to rotate in the D direction by pressing in the direction. As a result, the tightening webbing 30 can be more strongly sandwiched between the cam 52 and the pressing wall 56,
Movement of the tightening webbing 30 in the B direction can be prevented very reliably.

When the tightening webbing 30 is pulled in the direction of arrow A, the cam 52 rotates in the direction opposite to the direction D, and the webbing 30 moves in the direction A.

In order to freely move the tightening webbing 30 in the A and B directions, the tension member 64 is pulled to pull the cam 52.
Should be rotated in the direction opposite to D.

[0016]

As described above, according to the web adjuster for a child seat of the present invention, the webbing can be held very reliably, and the child sitting on the child seat can be protected very surely.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a child seat web adjuster according to an embodiment.

FIG. 2 is a perspective view of a cam of the web adjuster for a child seat according to the embodiment.

FIG. 3 is a perspective view of a case of the web adjuster for a child seat according to the embodiment.

FIG. 4 is a perspective view of a child seat.

FIG. 5 is a sectional view of a conventional web adjuster for a child seat.

[Explanation of symbols]

 10 Child seat 18, 20, 30 Webbing 50 Case 52 Cam 54 Pin 56 Webbing retainer wall 60 Arm

Claims (1)

[Claims] 1. A cam, which is rotatable about a pivot and is provided with a webbing contact surface having a plurality of projections for holding the webbing, and a case which pivotally supports the cam. A webbing retainer wall provided on the case and facing the webbing retainer face of the cam, and a spring for urging the cam so as to rotate in a direction in which the webbing retainer face overlaps the webbing retainer wall. A web adjuster for a child seat, comprising: Web adjuster.