Folding structure for main handle of handle-controlled skate...

Details Folding structure for main handle of handle-controlled skate... Folding structure for main handle of handle-controlled skate...

2000-05-12

2001-09-11

Mar, Michael (Department: 3619)

Land vehicles

Wheeled

Coasters

C280S087041, C016S324000, C403S325000

Reexamination Certificate

active

06286845

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a folding structure for main handle of handle-controlled skate board. The folding structure is not subject to abrasion and is more rigid and durable. In addition, in use, there are two fixing structures so that the safety in use can be ensured.
The existing handle-controlled skate board is required to have light weight and reduced volume for facilitating storage and carriage. Therefore, the handle-controlled skate board is designed with folding structure for folding the handle-controlled skate board and reducing the volume thereof. The attachment shows a folding device of a handle-controlled skate board disclosed in Taiwanese Patent Application No. 087215733 filed on Sep. 21, 1998 and published on Dec. 21, 1999 under Publication No. 377689. Such folding device has some shortcomings as follows:
1. The handle stem
4
and the connecting frame
5
are located in such a manner that one end of an extension spring S is fixed on a pin shaft
6
, while the other end thereof downward pulls the stop post
7
to automatically engage with the stop channel
32
of two ends of the arch rail
31
and locate therein. The location is achieved simply by the extension spring S so that the safety in riding can be hardly ensured. For example, in riding, the stop post
7
is subject to external force such as rebounding force and tends to disengage from the stop channel
32
. This will lead to danger.
2. The handle stem
4
is foldably located on the body of the handle-controlled skate board in such a manner that the stop post
7
is passed through the arch rail
31
of the connecting seat
3
and the shaft hole
51
of the connecting frame
5
. The extension spring S downward pulls the stop post
7
, permitting the stop post
7
to slidably locate in the arch rail
31
. However, the stop post
7
is subject to abrasion and the diameter of the stop post
7
will be reduced after a period of use or the diameter of the arch rail
31
will be expanded due to a long period of wearing. Therefore, a gap will exist between the stop post
7
and the arch rail
31
and the handle will swing during riding to lead to danger.
3. The U-shaped connecting seat
3
(or two plate bodies each being formed with an arch rail
31
and stop channel
32
) is locked or welded on the end of the body
2
by screws. The handle stem
4
, connecting frame
5
, pin shaft
6
and the stop post
7
are disposed on the connecting seat
3
. During riding, most of the force application points fall onto the connecting seat
3
. However, the connecting seat
3
has insufficient strength and is subject to damage. This will result in danger during riding.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a folding structure for main handle of handle-controlled skate board in which there are two security locations for both folding and unfolding states of the handle-controlled skate board so that no matter whether when a user rides or transfers the handle-controlled skate board, the stem will not loosen and the safety in riding can be ensured.
It is a further object of the present invention to provide the above folding structure for main handle of handle-controlled skate board in which the fast detachable sleeve is slided within the slide way only by small travel for location and during sliding, no force normal to the frictional face is created so that no abrasion will take place and the device can be more durably used.
It is still a further object of the present invention to provide the above folding structure for main handle of handle-controlled skate board in which after the T-shaped fixing section of the body is associated with the supporting frame of the stem, the longitudinal section of the T-shaped fixing section is snugly fitted into the mating channel of the supporting frame to form a concrete structure which has better strength and durability.
It is still a further object of the present invention to provide the above folding structure for main handle of handle-controlled skate board in which the supporting frame is integrally made of aluminum extrusion and formed with several perforations so that the supporting frame has light weight and high strength.
The present invention can be best understood through the following description and accompanying drawings wherein:


REFERENCES:
patent: 4707884 (1987-11-01), Chang
patent: 5595392 (1997-01-01), Casillas
patent: 5927733 (1999-07-01), Banda
patent: 5961130 (1999-10-01), Gorza et al.
patent: 6120044 (2000-09-01), Tsai
patent: 6158751 (2000-12-01), Wu et al.
patent: 6173976 (2001-01-01), Lee
patent: 6182988 (2001-02-01), Wu
patent: 6199880 (2001-03-01), Favorito et al.
patent: 6234501 (2001-05-01), Chen

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