US 6,644,676 B2Granted

Safety device for a front wheel of a vehicle for children

OwnerJung-Jyh Wuinventor

Life of this patent

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Abstract

A front wheel for a vehicle for children provides a wheel frame having a slot through which a crank extends. A locking plate is securely mounted to the crank to turn therewith. A switch member is attached to the wheel frame and includes a guide groove. When an end of a pin is in an end of the guide groove of the switch member, the other end of the pin is in a locking position engaged with a positioning notch of the locking plate, thereby allowing joint rotation of the wheel frame and the crank. When the end of the pin is in a second end of the guide groove of the switch member, the other end of the pin is in an unlocking position disengaged from the positioning notch of the locking plate, thereby allowing independent rotations of the crank and the wheel frame.

Claims6

Dependent claims

A front wheel for a vehicle for children, the front wheel comprising:

a wheel frame (2) including a first side and a second side defining a compartment (23) therebetween, the wheel frame further including a slot (211, 221) extending from the first side through the second side, the wheel frame further including a guide slot (212);
a crank (4) extending through the slot (211, 221) of the wheel frame (2), a locking plate (43) being securely mounted to the crank (4) to turn therewith, the locking plate (43) being located in the compartment (23) and including at least one positioning notch (44);
and
a safety device (3) for controlling independent rotations of the wheel frame (2) and the crank (4), the safety device (3) including a switch member (32) that is attached to the wheel frame (2) and that is rotatable between a first position and a second position, the switch member (32) further including a guide groove (322) having a first end (323) and a second end (324), the safety device (3) further including a pin (31) having a first end (311) received in the guide groove (322) of the switch member (32) and a second end (312) extending through the guide slot (212) into the compartment (23) of the wheel frame (2), the pin (31) being moved between a locking position and an unlocking position corresponding to the first position and the second position of the switch member (32);
wherein when the first end (311) of the pin (31) is in the first end (323) of the guide groove (322) of the switch member (32), the second end (312) of the pin (31) is in the locking position that is engaged with said at least one positioning notch (44) of the locking plate (43), thereby allowing joint rotation of the wheel frame (2) and the crank (4);
and
wherein when the first end (311) of the pin (31) is in the second end (324) of the guide groove (322) of the switch member (32), the second end (312) of the pin (31) is in the unlocking position that is disengaged from said at least one positioning notch (44) of the locking plate (43), thereby allowing independent rotations of the crank (4) and the wheel frame (2).

4 more elements

Dependencies are inferred from the claim text.

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Abstract

A front wheel for a vehicle for children, the front wheel comprising:

a wheel frame (2) including a first side and a second side defining a compartment (23) therebetween, the wheel frame further including a slot (211, 221) extending from the first side through the second side, the wheel frame further including a guide slot (212);
a crank (4) extending through the slot (211, 221) of the wheel frame (2), a locking plate (43) being securely mounted to the crank (4) to turn therewith, the locking plate (43) being located in the compartment (23) and including at least one positioning notch (44);
and
a safety device (3) for controlling independent rotations of the wheel frame (2) and the crank (4), the safety device (3) including a switch member (32) that is attached to the wheel frame (2) and that is rotatable between a first position and a second position, the switch member (32) further including a guide groove (322) having a first end (323) and a second end (324), the safety device (3) further including a pin (31) having a first end (311) received in the guide groove (322) of the switch member (32) and a second end (312) extending through the guide slot (212) into the compartment (23) of the wheel frame (2), the pin (31) being moved between a locking position and an unlocking position corresponding to the first position and the second position of the switch member (32);
wherein when the first end (311) of the pin (31) is in the first end (323) of the guide groove (322) of the switch member (32), the second end (312) of the pin (31) is in the locking position that is engaged with said at least one positioning notch (44) of the locking plate (43), thereby allowing joint rotation of the wheel frame (2) and the crank (4);
and
wherein when the first end (311) of the pin (31) is in the second end (324) of the guide groove (322) of the switch member (32), the second end (312) of the pin (31) is in the unlocking position that is disengaged from said at least one positioning notch (44) of the locking plate (43), thereby allowing independent rotations of the crank (4) and the wheel frame (2).

4 more elements