Latch Mechanism for a Child Car Seat

• US 20090001791A1
• Filed: 09/05/2008
• Published: 01/01/2009
• Est. Priority Date: 12/12/2006
• Status: Active Grant

• Current Assignee: Wonderland Nurserygoods Company Limited
• Original Assignee: Wonderland Nurserygoods Company Limited
• Inventors: Haut, Robert E., Hutchinson, James M. F., Sellers, Gregory S., Sims, John T., Hartenstine, Curtis M.
• Granted Patent: US 7,819,472 B2
• Time in Patent Office: Days
• US Class Current: 297/250.100
• CPC Class Codes: B60N 2/2821 having a seat and a base part
• CPC Class Codes: B60N 2/2851 provided with head-rests
• CPC Class Codes: B60N 2/286 forward facing B60N2/2866 takes precedence
• CPC Class Codes: B60N 2/2863 backward facing
• CPC Class Codes: B60N 2/2872 provided with side rests
• CPC Class Codes: B60N 2/2875 inclinable, as a whole or partially
• CPC Class Codes: B60N 2002/957 the locking system prevents an abnormal or wrong mounting situation, i.e. deployment or functioning of a seat part being prevented if the seat or seat part is not properly mounted
• CPC Class Codes: B60R 21/01556 Child-seat detection systems

Abstract

A latching mechanism for a car seat that is mountable on a separable base member provides a positive locking of the car seat to the base member. The latch mechanism has a member that is positioned in the seat portion of the car seat to pivot upwardly when the latch mechanism is disengaged. The seating of a child on the seat portion requires the latch mechanism to be retracted into the seat portion, which corresponds to the locking of the latch mechanism. The latch mechanism includes four helical spools rotated by the pivotal movement of the latch lever to cause linear movement of the locking pins into engagement with the base member. A latch indicator has a pre-latch sensor that indicates proper positioning of the seat member and a latch sensor that indicates an engagement of the locking pins. An indicator light illuminates when the seat member is properly latched.

Claims

1. A car seat for transporting a child in a vehicle, comprising:

a base member connectable to a vehicle seat;

a seat member detachably connectable to said base member, said seat member having a seat portion on which said child is positioned when utilizing said car seat;

a locking apparatus movable between a locked position interengaged between said base member and said seat member to secure the seat member to said base member and a released position to permit said seat member to be removed from said base member, said locking apparatus including first and second locking pins linearly movable between said locked and released positions; and

an actuation apparatus operably connected to said locking apparatus to affect simultaneous movement of said first and second locking pins between said locked and released positions.

2. The car seat of claim 1 wherein said actuation apparatus is operatively connected to one of said first and second locking pins to affect movement thereof between said locked and released positions, said locking apparatus further comprising a connecting link interconnecting said first and second locking pins to affect said simultaneous movement thereof.

3. The car seat of claim 2 wherein said first and second locking pins form a portion, respectively, of front and rear locking devices, each of said front and rear locking devices comprises:

a pair of opposing rotatable spools, each spool being formed with a helical slot;

one of said locking pins associated with each said spool and being movable between said locked position and said released position; and

an actuation pin engaged with each respective said helical slot and with the corresponding said locking pin to affect linear movement of said locking pin between said locked and released positions in response to a rotational movement of said spool.

4. The car seat of claim 3 wherein each said locking pin is aligned with an axis of rotation of the corresponding said spool, the corresponding said actuation pin passing through said locking pin to be engagable with linear slots in said seat member on opposing sides of said spool to confine movement of said actuation pin into a linear direction.

5. The car seat of claim 4 wherein said actuation apparatus includes an actuation knob affixed to a transverse actuation shaft and a drive link transferring rotational movement of said actuation shaft to each said front spool.

6. The car seat of claim 5 wherein said actuation apparatus further includes a pair of flag members mounted on said actuation shaft and being located on said seat portion, said flag members being recessed into said seat member when in said locked position and pivoted upwardly when in said released position, said drive links interconnecting said flag members and a corresponding said rotatable spool.

7. The car seat of claim 1 further comprising a latch indicator showing both a movement of said locking device into said locked position and a proper positioning of said seat member on said base member.

8. The car seat of claim 7 wherein said indicator comprises:

a prelatch sensor cooperable with said seat member and said base member to indicate said proper positioning of said seat member on said base member;

a latch sensor cooperable between said actuation apparatus and said seat member to indicate the movement of said locking device into said locked position; and

an indicator to show the indication of both said prelatch and said latch sensors.

9. The car seat of claim 8 wherein both said prelatch sensor and said latch sensor are proximity sensors that produce a signal indicative of a magnetic member being within a sensing range of said proximity sensors, said indicator being an LED.

10. The car seat of claim 9 wherein a first magnetic member is positioned on said base member to be cooperable with said prelatch proximity sensor mounted on said seat member, a second magnetic member being located on said actuation apparatus to be cooperable with said latch sensor mounted on said seat member, said LED indicator being operative to flash a first signal representative of said prelatch proximity sensor coming into sensing range of said first magnetic member, and to flash a second signal representative of said latch proximity sensor coming into sensing range of said second magnetic member after said first signal has been demonstrated.

11. The car seat of claim 7 wherein said latch indicator comprises:

a pivot member rotatable about an axis of rotation and being located to be engaged by one of said locking pins to affect rotation thereof when said locking pin is moved into said locked position.

12. The car seat of claim 11 wherein said locking pins are supported on said seat member, said base member including openings therein alignable, respectively, with a corresponding said locking pin, said pivot member being located on said base member such that the movement of the corresponding said locking pin engages said pivot member when engaged with the corresponding said opening.

13. The car seat of claim 12 wherein said pivot member has an exterior surface exposed through a hole in said base member, said exterior surface being divided into a first section and a second section, said first section including indicia representing said locking pin being in said leased position, said second section including indicia representing said locking pin being in said locked position.

14. The car seat of claim 7 further comprising a release indicator coupled to said actuation apparatus to provide a visual indication of the movement of said locking apparatus into said released position.

15. In a car seat having a base member connectable to a vehicle seat and a seat member detachably connectable to said base member, said seat member having a seat portion on which a child is positioned when utilizing said car seat, a latching mechanism comprising:

a locking apparatus movable between a locked position in which said seat member is engaged with said base member and a released position in which said seat member can be disengaged from said base member;

an actuation apparatus operably connected to said locking device to affect movement thereof between said locked and released positions;

a release indicator coupled to said actuation apparatus to provide a visual indication of the movement of said locking device into said released position.

16. The car seat of claim 15 wherein said release indicator is a portion of said actuation apparatus that is recessed into said seat portion when said locking device is in said locked position and pivoted upwardly from said seat portion when said locking device is in said released position so that said child cannot be seated on said seat portion of said seat member when said locking device is not is said locked position.

17. The car seat of claim 16 wherein said portion of said actuation apparatus is a latch lever that is connected to said locking device to affect movement of said locking apparatus between said locked and released positions.

18. The car seat of claim 16 wherein said portion of said actuation apparatus is a pivot flag that is mounted on a transverse actuation shaft rotatable to affect movement of said locking device, said pivot flag being pivoted in response to the movement of said locking apparatus between said locked and released positions.

19. The car seat of claim 16 wherein said locking apparatus comprises:

a front locking apparatus movably supported on said seat portion;

a rear locking apparatus movably supported on said seat portion; and

a connecting link interconnecting said front and rear locking apparatus to affect simultaneous movement thereof when said actuation apparatus is manipulated to affect movement of said front and rear apparatus between said locked and released positions.

20. The car seat of claim 19 wherein each of said front and rear locking apparatus comprises:

a pair of opposing rotatable spools, each spool being formed with a helical slot;

a locking pin associated with each said spool and being movable between said locked position and said released position; and

an actuation pin engaged with each respective said helical slot and with the corresponding said locking pin to affect linear movement of said locking pin between said locked and released positions in response to a rotational movement of said spool.

21. The car seat of claim 20 wherein each said locking pin is aligned with an axis of rotation of the corresponding said spool, the corresponding said actuation pin passing through said locking pin to be engagable with linear slots in said seat member on opposing sides of said spool to confine movement of said actuation pin into a linear direction, said actuation apparatus including an actuation knob affixed to a transverse actuation shaft to affect rotational movement thereof, and a drive link transferring rotational movement of said actuation shaft to each said front spool.

22. A car seat for transporting a child in a vehicle, comprising:

a base member connectable to a vehicle seat;

a seat member detachably connectable to said base member, said seat member having a seat portion on which said child is positioned when utilizing said car seat;

a locking apparatus movable between a locked position interengaged between said base member and said seat member to secure said seat member to said base member and a released position to permit said seat member to be disengaged from said base member;

an actuation apparatus operably connected to said locking apparatus to affect movement thereof between said locked and released positions; and

a latch indicator that displays a signal that said locking apparatus has been moved into said locked position after a proper positioning of said seat member on said base member.

23. The car seat of claim 22 wherein said latch indicator comprises:

a prelatch sensor cooperable with said seat member and said base member to indicate said proper positioning of said seat member on said base member;

a latch sensor cooperable between said actuation apparatus and said seat member to indicate the movement of said locking apparatus into said locked position; and

an LED indicator that illuminates to display the indication of both said prelatch and said latch sensors.

24. The car seat of claim 23 wherein both said prelatch sensor and said latch sensor are proximity sensors that produce a signal indicative of a magnetic member being within a sensing range of said proximity sensors.

25. The car seat of claim 24 wherein a first magnetic member is positioned on said base member to be cooperable with said prelatch proximity sensor mounted on said seat member, a second magnetic member being located on said actuation apparatus to be cooperable with said latch sensor mounted on said seat member.

26. The car seat of claim 25 wherein said LED indicator flashes a first signal representative of said prelatch proximity sensor coming into sensing range of said first magnetic member, and a second signal representative of said latch proximity sensor coming into sensing range of said second magnetic member after said first signal has been demonstrated.

27. The car seat of claim 22 wherein said locking apparatus includes first and second locking pins linearly movable between said locked and released positions, said latch indicator comprising:

a pivot member rotatable about an axis of rotation and being located to be engaged by one of said locking pins to affect rotation thereof when said locking pin is moved into said locked position.

28. The car seat of claim 27 wherein said locking pins are supported on said seat member, said base member including openings therein alignable, respectively, with a corresponding said locking pin, said pivot member being located on said base member such that the movement of the corresponding said locking pin engages said pivot member when engaged with the corresponding said opening.

29. The car seat of claim 28 wherein said pivot member has an exterior surface exposed through a hole in said base member, said exterior surface being divided into a first section and a second section, said first section including indicia representing said locking pin being in said leased position, said second section including indicia representing said locking pin being in said locked position.

30. The car seat of claim 29 wherein each said locking pin has a pivot member associated therewith to provide a indication that each respective locking pin has been moved into said locked position.