Handle rod structure of golf retriever

A handle rod structure of a golf ball retriever comprising a plurality of sections of telescopic tubes which can be telescopic in sequence, whereas in each two adjoining tubes, a plunger having an annular groove is provided and inserted into the inner tube. The annular groove forms an eccentric to match the annular sleeve plate which has internal eccentricity the same as that of the annular groove. The annular sleeve plate is placed in the annular groove, so that the rotation of the inner tube in one direction, causes the annular sleeve plate to tightly engage the inner wall of the outer tube, and the rotation of the inner tube in the other direction loosens the annular sleeve plate in the outer tube, thus placing the inner and outer tubes in a state such that they can freely and oppositely extend or retract, thereby achieving the actions of the multi-sectional type and length-adjustable handle rod of the retriever.

BACKGROUND OF THE INVENTION 
The present invention relates to an improvement in the handle rod structure 
of a golf ball retriever, in particular, the handle structure such that 
its inner and outer tubes can be rotated in opposite directions and thus 
mutually packed and secured together. Reversal of such rotation loosens 
the tubes allowing their retraction and extension. In the use of a golf 
ball retriever the distances required for a it to reach and retrieve a 
golf ball are sometimes shorter and sometimes longer. For the convenience 
of use and carriage, the handle rod of a golf ball retriever is of a 
multi-sectional type. By means of the telescoping inner and outer tubes, 
the tubes are telescoped section by section. To alter the length of the 
golf ball retriever conveniently, sufficient width and looseness between 
the inner and outer tubes must be provided. Furthermore, both the inner 
and outer tubes must be optionally fixable according to the distances used 
under various retractible or extendable states. Further, because the 
handle rod is of a multi-sectional type, firm securement of the first 
section is up to the securing force of its second section, which in turn 
is up to the securing force of its 3rd section and also the mutual 
securing force of all its following sections. Therefore, the securing 
structure of its inner and outer tubes is of paramount importance, 
otherwise, if there happens to occur any movement or rotation of any 
section, there will result difficulties in any long-distance golf ball 
retriever operations. 
SUMMARY OF THE INVENTION 
The main object of this invention is to provide a handle rod structure of a 
golf ball retriever which includes telescopic multi-sectional inner and 
outer tubes, plungers, annular grooves and annular sleeve plates. Said 
plungers are set in the ends of said inner tubes, said annular grooves are 
cut in said plungers and said annular sleeve plates mounted thereon. By 
the eccentric principle and rotational movement of said annular sleeve 
plates and ring-shaped grooves, said inner and outer tubes can optionally 
and suitably be rotated and secured as well as turned in a reverse 
direction to release so as to enhance the actions and functions of this 
multi-sectional type handle rod.

DETAILED DESCRIPTION OF THE PRESENT INVENTION 
The present invention is composed of a plurality of telescopic tube 
sections, the tubes can be slid on section by section in sequence, i.e. 
inside the prime tube A which forms the handle portion there is slid a 
branch tube B, then said branch B has another branch tube slid therein and 
so on in sequence. The number of sections of the branch tubes can be 
determined by the required extensible length, a golf ball retriever F is 
provided on the end of the tail tube E. 
The adjoining outer and inner tubes of the present invention include: a 
hollow outer tube 1, a hollow inner tube 2, a plunger 3, annular sleeve 
plate 4, and sectional ring 5. (Please refer to FIG. 3) Outer tube 1 is a 
hollow round tube, with an annular concave groove 11 provided in the outer 
rim at a proper position on the front end of outer tube 1. The outer 
diameter of inner tube 2 is a little smaller than the inner diameter of 
outer tube 1, such that outer tube 1 can be sleeved on to inner tube 2 
from one end of outer tube 1, and cutout notch 21 is provided in the inner 
end of inner tube 2. Plunger 3 is a cylindrical rod section which has a 
cylindrical end 31 (the plug-in end), the outer diameter of which is the 
same as the inner diameter of inner tube 2. The other end of plunger 3 has 
an eccentric annular groove 32, with a raised ring 33 provided between the 
annular groove 32 and cylindrical end 31; axial flanges 34, 35 extending 
toward both ends are provided at a proper place on raised ring 33. Flange 
35 is to be inserted in the cutout notch 21 in inner tube 2 to make it 
drive plunger 3 into rotation when said inner tube 2 is rotated. The 
annular sleeve plate 4 is a ring-shaped sleeve with an opening 41 and its 
inner diameter 42 is an eccentric hole with the eccentricity the same as 
that of above-said annular groove 32. Concave and convex patterns 43 are 
provided on the outer perimeter of annular sleeve plate 4, and a flange 44 
is provided on one end of sleeve plate 4. An annular flange 51 is provided 
at a proper position in the inner wall of sectional ring 5 (please refer 
FIGS. 3 and 4), inward from one end, to be inserted into the concave 
groove 11 of above-said outer tube 1, so as to join the sectional ring 5 
onto outer tube 1, while concave and convex patterns 52 are provided on 
the outer perimeter of sectional ring 5 to permit one to grasp and rotate 
outer tube 1 easily. 
In use, because the eccentricity of the above-said annular groove 32 is the 
same as that of the inner diameter of annular sleeve plate 4, when inner 
tube 2 is rotated toward one direction, the flange 34 of plunger 3 engages 
the flange 44 of annular sleeve plate 4, thus rotating them together at 
the same time. The plunger 3 and the outer perimeter of annular sleeve 
plate 4 form a concentric circle (without any eccentric phenomenon), and 
the inner and outer tubes are in a loose state as shown in FIGS. 4 and 
4-1. Thus, inner and outer tubes are extendable and retractable to adjust 
their lengths. When inner tube 2 is rotated in the opposite direction, the 
flange 34 of plunger 3 disengages the flange 44 of annular sleeve plate 4, 
thus gradually forming the eccentric phenomenon, and also gradually making 
annular sleeve plate 4 tightly engage the inner wall of outer tube 1 (as 
shown in FIGS. 5 and 5-1. If rotated in the reverse way, just as mentioned 
above, inner and outer tubes will restore to their original loose state so 
as to be adjustable. The above-said is one embodiment of the present 
invention, according to the structure comprising the plunger, annular 
groove, and annular sleeve plate provided in this case, their concrete 
shapes may still have local changes and modifications without departing in 
a substantial way from the above structure. For instance, the annular 
sleeve plate in this case can have a smooth surface is the case with the 
annular sleeve plate 6 in FIG. 6 wherein opening 61, inner diameter 62 and 
flange 64 correspond to items 41,42 and 44 respectively of annular sleeve 
plate 4 of FIG. 3. 
Summing up, as to the handle rod structure of the golf ball retriever 
provided by the present invention, the retrieving and securing state 
between its inner and outer tubes is extremely precise such that it cannot 
easily be turned loose, especially in the generally used items such as the 
4-6-section golf ball retriever handle rod. The securing between the 
various sections affects the similar state of the other sections; besides, 
as for the structure provided by the present invention, its members are 
simple and easy to operate, so it has a high practical value.