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Child car seat and belt locking apparatus used therefor

Imported: 24 Feb '17 | Published: 06 Jan '04

Hidenori Yanaka, Mitsuru Washizuka

USPTO - Utility Patents

Abstract

A child car seat (

10) has a belt insertion opening (

13) having inlets at opposite side surfaces thereof to receive a seat belt (

16) inserted therethrough, and has an aperture (

14) opening to the front surface thereof to provide access to the belt insertion opening (

13). A belt locking apparatus (

20) is disposed inside the belt insertion opening (

13) to be handled through the aperture (

14). The belt locking apparatus (

20) includes a base (

21) secured inside the belt insertion opening (

13), and a lock arm (

22) disposed for rotation relative to the base (

21) to receive the seat belt (

16) therein when the lock arm (

22) is opened, and to clamp the seat belt (

16) between the lock arm (

22) and the base (

21) when the lock arm (

22) is closed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective view that shows the first embodiment of the child car seat according to the present invention;

FIG. 2 is a perspective view that shows a belt locking apparatus, which is an essential part of the child car seat shown in FIG. 1, in its opened position;

FIG. 3 is a perspective view of the belt locking apparatus shown in FIG. 2 in its closed position;

FIG. 4 is a schematic cross-sectional view that shows the function of the belt locking apparatus according to the first embodiment of the present invention;

FIG. 5 shows a procedure of attaching a seat belt in the belt locking apparatus according to the first embodiment of the present invention, in a perspective view that shows how the lap belt section is attached;

FIG. 6 shows a procedure of attaching a seat belt in the belt locking apparatus according to the first embodiment of the present invention, in a perspective view that shows how the shoulder belt section is attached;

FIG. 7 shows a procedure of attaching a seat belt in the belt locking apparatus according to the first embodiment of the present invention, in a perspective view that shows an aspect after tightening the seat belt;

FIG. 8 shows a procedure of attaching a seat belt in the belt locking apparatus according to the first embodiment of the present invention, in a perspective view that shows an aspect after completing attachment of the seat belt;

FIG. 9 is a schematic exploded perspective view that shows a belt locking apparatus according to the second embodiment of the present invention;

FIG. 10 is a perspective view of an essential part of the belt locking apparatus, assembled, according to the second embodiment of the present invention;

FIGS. 11A,

11B and

11C show the function of the belt locking apparatus according to the second embodiment of the present invention, in which FIG. 11A shows its initial configuration, FIG. 11B shows a process of tightening the seat belt; and FIG. 11C shows a locked configuration of the seat belt;

FIG. 12 is a schematic cross-sectional view that shows the seat belt locking function of the belt locking apparatus according to the second embodiment of the present invention;

FIG. 13 is a schematic perspective view that shows a belt locking apparatus according to the third embodiment of the present invention;

FIGS. 14A and 14B show the function of the belt locking apparatus according to the third embodiment of the present invention, in which FIG. 14A shows its initial configuration and FIG. 14B shows the locked configuration of the seat belt;

FIGS. 15A and 15B are diagrams that shows belt locking apparatuses according to the present invention attached in other positions;

FIG. 16 is a schematic perspective view that shows a child car seat having a conventionally employed clip; and

FIG. 17 is a perspective view that shows a child car seat that is previously proposed by the applicant.

Claims

1. A child car seat to be fixed on a passenger seat of a vehicle with a seat belt of the vehicle, comprising:

2. A child car seat according to claim 1, wherein said locking mechanism includes a lock arm disposed for rotation relative to said base to tightly clamp the seat belt between said base and said lock arm when said lock arm is closed relative to said base, thereby preventing a movement of the seat belt in a lengthwise direction thereof.

3. A child car seat to be fixed on a passenger seat of a vehicle with a seat belt of the vehicle, comprising:

4. A child car seat according to claim 3, wherein said cam has a cam surface including depressions or projections which increase a frictional resistance to the seat belt.

5. A child car seat according to claim 3, wherein said belt locking apparatus further includes a ridge formed on the intermediate member to project near said cam within an area for receiving the seat belt when said lock arm is closed.

6. A belt locking apparatus used in a child car seat to be fixed on a passenger seat of a vehicle with a seat belt of the vehicle, comprising:

7. A belt locking apparatus according to claim 6, wherein said locking mechanism includes a lock arm disposed for rotation relative to said base to clamp the seat belt between said base and said lock arm when said lock arm is closed relative to said base, thereby preventing a movement of the seat belt in a lengthwise direction thereof.

8. A belt locking apparatus used in a child car seat to be fixed on a passenger seat of a vehicle with a seat belt of the vehicle, comprising:

9. A belt locking apparatus according to claim 8, wherein said cam has a cam surface including depressions or projections which increase a frictional resistance to the seat belt.

10. A belt locking apparatus according to claim 8, further comprising a ridge formed on the intermediate member to project near said cam within an area for receiving the seat belt when said lock arm is closed.

11. A child car seat to be fixed on a passenger seat of a vehicle with a seat belt of the vehicle, comprising:

12. A child car seat according to claim 11, wherein the base body supports a latch member pivotably supported at another end of the base body.

13. A child car seat according to claim 11, wherein the lock arm includes a claw which engages with an engagement hole of the latch member.

14. A belt locking apparatus used in a child car seat to be fixed on a passenger seat of a vehicle with a seat belt of the vehicle, comprising:

15. The belt locking apparatus according to claim 14, wherein the base body supports a latch member pivotably supported at another end of the base body.

16. The belt locking apparatus according to claim 15, wherein the lock arm includes a claw which engages with an engagement hole of the latch member.

17. The belt locking apparatus according to claim 14, wherein the child car seat further comprises: