Restoring device of a frame for a skateboard

The present invention relates to a restoring device of a frame for a skateboard comprising a height-adjustable handgrip at the top of a front supporting bar which is attached with a main frame, a locating member being pivoted with the main frame so that, when the front supporting bar is moved by the handgrip to perform a right and left turning, the main frame will create a side-sloping action in order to achieve the wheel-turning effect. The improvement is characterized in that an axle sleeve and a soft packing ring are inserted into an axial through hole at the top of the locating member in order to hinge with a pivot of the main frame so that the main frame automatically restores itself by means of the soft packing ring after the side-sloping force disappears.

BACKGROUND OF THE INVENTION
 The present invention is a continuation-in-part of U.S. patent application
 Ser. No. 09/517,335, filed Mar. 2, 2000.
 1. Field of the Invention
 The present invention relates to a steering device of a skateboard, and
 more particularly, to a restoring device of a frame for a skateboard by
 means of a soft packing ring.
 2. Description of the Prior Art
 The steering device of a broadly used conventional skateboard is
 structurally the same to that of bicycles or cars, that is, they make use
 of turning the handle or the steering wheel to enable the coupled wheel
 assembly to carry out a direct direction-turning movement. Though this is
 a very common technique and can reach the steering effect, it's uneasy to
 hold the handgrip 10 with one hand in turning the direction, especially
 for the beginner or the user unfamiliar therewith, because it is an
 exercise apparatus (or called toy) with small volume. An excessive or
 insufficient turning movement is easily caused.
 SUMMARY OF THE INVENTION
 It is a main object of the present invention to provide a restoring device
 of a frame for a skateboard wherein the steering device makes use of the
 right or left shift of the steering handle or the body gravity of the
 users to reach a simultaneous side-sloping effect so that the wheels can
 be easily turned. In addition, a soft packing ring can be used to restore
 the frame when the side-sloping external force disappears.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
 First of all, referring to FIGS. 1 and 2, they show a preferred embodiment
 of the present invention which includes the following basic components:
 a front supporting bar 20 having a handgrip 21 at the top thereof while the
 bottom thereof is connected with a main frame 30;
 a main frame 30 having a pivot 31 at front end thereof, said main frame 30
 being hinged with a ring-shaped piece 35 near a locating member 50 at the
 bottom end thereof;
 a deck 40 placed upon said main frame 30, a tail 42 being raised and
 covering the top ol a rear wheel assembly 70, a proper clearance being
 kept between said tail 42 and said rear wheel assembly 70;
 a locating member 50 having an axial through hole 51 for receiving an axle
 sleeve 32 and a soft packing ring 33 in order to hinge with said pivot 31
 of said main frame 30, while the bottom end thereof being hinged with an
 axle shaft sleeve 60 by means of a fastener 52;
 an axle shaft sleeve 60 being connected with a front wheel assembly 61 at
 the bottom end thereof, said axle shaft sleeve 60 having an extension rod
 62 disposed at one side thereof and extending in the direction of said
 main frame 30, said extension rod 62 entering into a ring hole 36 of said
 ring-shaped piece 35; and
 a rear wheel assembly 70.
 After assembly of the foregoing components, as shown in FIGS. 4 and 5, when
 the front supporting bar 20 is turned by the handgrip 21 to the right and
 the left direction, the main frame 30 will be made in a sloping state.
 Furthermore, the ring-shaped piece 35 pivoted at the bottom of the main
 frame 30 moves the extension rod 62 of the axle shaft sleeve 60, wherein
 the top end of the axle shaft sleeve 60 is pivoted with the locating
 member 50 while the bottom end thereof is coupled with the front wheel
 assembly 61. Therefore, when the extension rod 62 is turned, the axle
 shaft sleeve 60 will be turned together so that the turning effect of the
 front wheel assembly 61 is achieved.
 Of course, the user can use the shift of the center of body gravity to
 reach the direction-turning effect.
 The soft packing ring 33 plugged into the axial through hole 51 of the
 locating member 50 is used to restore the pivot 31 by means of the
 resilient force when the external force disappears after the pivot 31 is
 squashed.
 Thereafter, in another preferred embodiment as shown in FIG. 3, the front
 and rear end of the main frame 30 can be fitted with a pivot 31. In
 coordination with a locating member 50 and an axle shaft sleeve 60 can a
 pivoting effect achieved. Also, the main frame automatically restores
 itself by means of a soft packing ring after the side-sloping force
 disappears.
 Many changes and modifications in the above-described embodiments of the
 invention can, of course, be carried out without departing from the scope
 thereof. Accordingly, to promote the progress in science and the useful
 arts, the invention is disclosed and is intended to be limited only by the
 scope of the appended claims.