Stretching structure for sunshade body

Tent – canopy – umbrella – or cane – Umbrella – Nonsymmetrical – axially offset – or inclined canopy

Reexamination Certificate

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Details

C135S020300, C135S021000, C135S090000, C135S098000

Reexamination Certificate

active

06401735

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a stretching structure for sunshade body, by which the sunshade body can be easily and quickly stretched open or collected only by means of upward pushing or downward pulling a locating collar fitted on the stem. Moreover, no cord is used for stretching open the sunshade body so that the problem of breakage of the cord is eliminated and the stretching structure can be more durably used. The structure has less components which can be easily assembled so that the manufacturing cost is lowered.
FIG. 1
shows a stretching structure of a conventional sunshade. A pivot member
151
is fixed at lower section of the stem
11
of the sunshade body
10
. The pivot member
151
is pivotally connected with one end of an auxiliary lever
16
. A roller
14
is disposed in the pivot member
151
. The other end of the auxiliary lever
16
is pivotally connected to upper side of a middle section of an upper support rib
18
. Another roller
14
is disposed at the pivot section. One of each of several upper support ribs
18
is pivotally connected with an upper beehive
171
of the main rib
17
. A cock member
181
is plugged in the other end of the upper support rib
18
. The lower side of the middle section of the upper support rib
18
is pivotally connected with one end of a lower support rib
182
. The other end of the lower support rib
182
is pivotally connected with the lower beehive
172
. One end of the cord A is upward conducted from the winding device
12
to wind over the respective rollers
14
and pass through the upper beehive
171
and the main rib
17
and then extend out of the lower beehive
172
. The end of the cord A is then knotted and fixed. When turning the winding crank
121
of the winding device
12
to wind the cord A, the cord A drives the lower beehive
172
upward to drive the lower support ribs
182
and the upper support ribs
18
. Therefore, the upper and lower support ribs
18
,
182
are upward stretched open. Then a locating handle
132
of a locating collar
13
is shifted downward to make an eccentric wheel fasten and locate the cord A. At this time, the sunshade body
10
is stretched open. When collected, the above operation is reversely performed.
The above conventional stretching structure has some shortcomings as follows:
1. The sunshade body
10
is stretched or collected by means of the winding device
12
, three rollers
14
and a cord A. Such structure includes numerous components so that the manufacturing cost is relatively high.
2. It is troublesome and time-consuming to assemble the numerous components.
3. After a long period of use, the cord A tends to break due to over-abrasion. This will make it impossible to stretch open the sunshade body
10
. Therefore, the conventional sunshade cannot be durably used.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a stretching structure for sunshade body, which has less components so that the manufacturing cost is lowered.
It is a further object of the present invention to provide the above stretching structure for sunshade body in which the components can be easily assembled so that the assembling time and labor are reduced.
It is still a further object of the present invention to provide the above stretching structure for sunshade body, by which the sunshade body can be easily and quickly stretched open or collected only by means of upward pushing downward pulling a locating collar fitted on the stem. Moreover, no cord is used for stretching open the sunshade body so that the problem of breakage of the cord is eliminated and the stretching structure can be more durably used.
The present invention can be best understood through the following description and accompanying drawings wherein:


REFERENCES:
patent: 4586525 (1986-05-01), Glatz
patent: 5116258 (1992-05-01), Vennik
patent: 5263505 (1993-11-01), Yeom
patent: 5785069 (1998-07-01), Glatz
patent: 5927310 (1999-07-01), Lin
patent: 5937882 (1999-08-01), Harbaugh
patent: 5960806 (1999-10-01), Steiner
patent: 6196242 (2001-03-01), Xu

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