Stable bobber for rod fishing

Stable Bobber for Rod Fishing consists of a stream-line conic rod with a plurality of proper holes at the side of its lower portion, or with two stream-line sections in reverse direction wherein one section is formed by cutting off its lower portion; these two kinds of bobber are either suitable for an open water region or for a close water region and are both very stable and sensitive. When the bobber is floating on the water and the color-striped post is affected by discontinual resistance force from waves and wind to oscillate and fall on the surface of water, the bobber can turn its stream-line to the proper direction and maintain itself upright and stable either by rotating itself to balance the back pressure or by gaining a negative pressure, and thus maintain its stability and sensibility.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention relates to rod fishing tackles and more particularly refers 
to the structure of a bobber suitable for either open or closed water 
regions. 
2. Prior Art 
In general, bobbers are used as a fishing rod tackle to aid the angler to 
become aware when fish are taking the bait. Thus a bobber should be 
designed to be both stable and sensitive to motion. Conventionally, 
bobbers are made of light materials in order that they may float on the 
water surface. In order to achieve an upright float and maintain stability 
in the water, such bobbers are designed to have a center of buoyancy 
located in an upper section thereof. To make them more sensitive, they are 
generally small and thin in cross-section. Thus, most bobbers are 
contoured into long, slender, and tapering extended members much in the 
manner of a cone. 
Generally there are two water region types used for fishing: (1) closed 
water regions in which there is no flowing motion in the water but wind 
and waves on the surface of the water; and, (2) open water regions in 
which there are flowing motions in a fixed direction with a predetermined 
speed of water flow with a further combination of wind and waves on the 
surface of the water. Conventionally, bobbers which float upright in 
either closed or open water regions have structural members including the 
main body of the bobber, color-striped guide-posts, and joint rods. The 
color-striped guide-post is integral with the top portion of the bobber 
main body and floats on the water surface. The joint rod is integral with 
the end portion of the bobber main body and may be used to couple with the 
fishing line. 
Both the joint rod and the bobber main body are located beneath the water 
surface. When the color-striped guide-post is displaced by the water 
waves, the resistance, speed and direction of the flowing water as well as 
the varying direction and discontinuous forces of the wind on the water 
surface, the bobber main body and fishing line will have a force applied 
which may be termed a force impulse causing rotation of the bobber. 
The conventional or prior art bobber is formed to have a center of buoyancy 
in an upper section which will counter and oppose the effect of the force 
impulse applied. However, if the force impulse in one area is greater than 
in another area, the bobber main body will rotate and fall causing the 
color-striped guide-post to turn, oscillate and fall simultaneously. This 
constant movement may have the effect of tiring the fisherman's eyes. 
In order to obviate the disadvantages of the prior art bobber, with 
relation to an unfixed, discontinuous, upright and stable turning effect 
when the bobber is affected by such discontinuous forces, the subject 
bobber maintains the sensitivity of prior art bobbers and replaces the 
conventional bobber which has been found to oscillate and fall in the 
water, with a more stable bobber. 
SUMMARY OF THE INVENTION 
The bobber according to the inventive concept has a bobber main body which 
is composed of a stream-lined rod tapering from an upper to a lower 
section. The cross-section of the stream-lined rod is completely 
stream-lined from the upper to lower section. The width and length of the 
stream-lined section is 1:3.5-4 so that the bobber will be suitable for 
either closed or open water regions. 
According to this invention, the bobber main body is suitable for an open 
water region and has a plurality of pressure-balancing holes disposed 
through one side of an end section of the bobber main body and extending 
beneath a distance five times as long as the width of the cross-section 
from the top of the main body. The bobber has an unfixed, discontinuous, 
upright and stable turning effect when the bobber is struck by a varying 
and discontinuous wind force as well as fluid current. The bobber can 
maintain itself upright and stable by rotation of the bobber so that a 
stream-lined end faces the direction of the flowing water. 
With relation to the closed water region, the bobber main body is suitable 
for the closed water region and is formed to a smaller stream-lined 
section which is a conic section formed in an opposing direction to the 
bobber main body. The small stream-lined section contour is disposed at 
one side of the end portion of the bobber main body and beneath the 
position five times as long as the width of the cross-section from the top 
of the main body. This contouring fits the design that the rate of a 
sectional width and length from top to bottom is 1:3.5-4. Therefore, the 
bobber has a varying, discontinuous upright and stable turning effect when 
the bobber is struck by a varying and discontinuous wind force and current 
resistance. The bobber maintains itself in an upright position and is 
stable. As previously stated for the open water region, the bobber 
replaces the conventional prior art bobbers which oscillate and fall in 
the water.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Bobbers having a high center of buoyancy and stream-lined sections 
generally have high sensitivity and a low coefficient of resistance. 
However, different bobbers should be designed for different water regions 
and the bobber main body should have proper contouring of stream-lined 
sections to provide maximum effectiveness when the bobber has differing 
forces applied. The object of this invention is to provide a bobber 
adaptable to different water regions such as closed and open water 
regions. 
An open water region is defined as a body of water which includes water 
flow having a fixed speed and a predetermined direction of the water flow 
including wind forces on the surface of the water. 
As shown in FIG. 1, there is provided a perspective view of the bobber main 
body according to the invention. The bobber 10 consists in combination of 
a stream-lined bobber main body 10, a color-striped guide-post 102, joint 
member 103, joint rod 105, connecting post 106, and a round post 108. The 
upper section of the bobber main body 101 is integral with the 
color-striped guide-post 102 and the lower section of the main body is 
integral with joint member 103. On one side of main body 101 there is 
located a plurality of pressure-balancing holes 104 passing therethrough. 
The lower portion of joint member 103 is integral with joint rod 105. 
In general, the combination of main body 101, color-striped guide-post 102 
and joint member 103 is similar to those of a conventional bobber. FIG. 2 
shows an elevation view of bobber main body 101, the upper section of the 
main body 101 has a vertically directed hole formed therein for insert of 
connecting post 106. A space 107 is formed in between the connecting post 
106 and the hole in the upper section of the main body 101 as shown in 
FIG. 3. This is formed in order that color-striped guide-post 102 may be 
set in the top portion or section of main body 101. The force fit 
connection post 106 reinforces the color-striped guide-post 102 and may be 
used as a joint head member for changing a damaged color-striped 
guide-post 102. 
The lower section of main body 101 has a round post 108 force fit therein 
which is set in the inner bore of joint member 103 as shown in FIG. 4. The 
joint member 103 is used to reinforce the smaller section of the lower 
portion or section of main body 101. A hole in the end portion of joint 
member 103 is used to connect a connecting rod 105 to form fixed joint 
member 103. Referring to FIG. 5, there is shown a sectional view of the 
combination of joint lever 100, round post 108, and joint element 109 
according to another embodiment of this invention. The joint lever 100 may 
rotate within the joint element 109. The fixed or the rotating joint lever 
103 or 109 is respectively suited to be used for live bait or artificial 
bait. 
An important improvement made by this invention lies in the bobber main 
body 101 shown in FIG. 2. The main body 101 is a conic section and a 
stream-lined contour bar tapering from an upper to a lower section. 
Cross-sections from the upper to lower sections of body 101 are all 
stream-lined. A cross-sectional view of the bobber main body is shown 
along line 6--6 of FIG. 2. The width "a" and length "b" of the 
stream-lined section from upper to lower sections of the main body 101 is 
approximately 1:3.5-4. The cross-section is formed through conformal 
transformation in a continuous manner to form a stream-lined contour. The 
reason why the width "a" and length "b" of the sections of main body 101 
is within the range 1:3.5-4, is that the coefficient of resistance is 
diminished when the width and length of a stream line is within this 
ratio. 
Therefore, when falling water or water speed in a predetermined direction 
bears against the main body 101, the main body 101 will turn its stream 
line into the flow motion direction and thus create a lower coefficient of 
resistance. Forces of water and wind resistance on the water surface are 
applied to the bobber 10. Wind forces have a discontinuous force effect 
which is in a varying direction on the bobber 10 which has the effect of 
causing the bobber to oscillate, fall, and turn eccentrically. This 
condition results from the separation of the boundary layers on the 
surface of the main body 101. A plurality of pressure-balancing holes 104 
are formed through the main body 101 on one side of the bobber main body 
101. The holes 104 extend throughout a distance five times the distance of 
the width of the cross-section at the upper section of the main body 101. 
The number of and sizing of the holes 104 may be increased or reduced 
according to the width and length of the main body 101. Due to the fact 
that the main body 101 has holes 104 passing therethrough, the volume of 
its lower section is reduced and the center of buoyancy of the main body 
101 is raised, thus making the bobber more stable. 
More particularly, when main body 101 is forced to float eccentrically, 
water will flow through the holes 104 and around the back of the main body 
101, thus balancing the pressure on opposing sides. The main body 101 
displaces its stream-lined section to face the flowing fluid and thus 
maintains the smallest force of resistance. Though there are discontinuous 
forces from varying directions, the bobber 10 only has a rotation 
displacement and maintains itself upright and stable but retains its 
sensitivity. This avoids the drawbacks of conventional bobbers which 
easily oscillate and fall. 
The size and numbers of pressure-balancing holes 104 are determined 
according to the condition that the pressure in the back of the bobber 10 
will be balanced and that the stream-lined surface layers will not be 
separated. 
As shown in FIG. 1, the top or upper portion of main body 101 is a convex 
arcuate contour which terminates at a point adjacent the center. The lower 
section of the main body 101 is a convex-concave, arcuate contour which 
ends at a point adjacent to joint member 103. As shown in FIG. 3, the main 
body 101 is in elevation and is stream-lined so that it has a small 
comparative value of width and length in the value range of a panel 
configuration. In this manner, the bobber 10 can attain the goal of 
securing high sensitivity with low coefficient of resistance when the main 
body 101 is moving vertically. 
A closed water region is defined where there are wind and waves on the 
surface of the water. As shown in FIG. 7, a perspective view of the bobber 
main body is provided according to another embodiment of the invention. 
The bobber 10 consists of a stream-lined bobber main body 101, 
color-striped guide-post 102, joint member 103, joint rod 105, connecting 
post 106, and round post 108. The upper section of the bobber main body 
101 is integral with the color-striped guide-post 102. The lower section 
of the bobber main body is integral with joint member 103. The structural 
integrity of the bobber 10 is the same as that of the bobber for the open 
water region, as shown in FIGS. 8 and 9. 
On the lower section of the main body 101 there is provided stream-lined 
arcuate contouring. The lower portion of joint member 103 is formed 
integral with a joint rod 105. In general, the combination and arrangement 
of and between the main body 101, color-striped guide-post 102, and joint 
member 103 is similar to those for the bobber previously described for the 
open water region. As shown in FIG. 8, the upper section of the main body 
101 has a hole formed therein for insert of connecting post 106. A space 
107 is provided between the connecting post 106 and the hole in the upper 
section of the main body 101 as shown in FIG. 3 so that color-striped 
guide-post 102 may be set in the top portion of the main body 101. The 
force fit connecting post 106 reinforces the color-striped guide-post 102 
and can be used as a joint head for possibly changing a damaged 
color-striped guide post 102. 
The lower section of the main body 101 has a round post 108 force fit 
therein which can be set in the inner bore of the joint member 103. The 
joint member 103 is used to reinforce the smaller section of the lower 
portion of the main body 101. The hole in the end portion of the joint 
member 103 is used to connect a connecting-rod 105 to form a fixed joint 
member 103. 
Referring to FIG. 9, there is shown a sectional view of the combination of 
jointing lever 100, round post 108 and joint element 109 according to 
still another embodiment of the invention. The joint lever 100 is 
rotatable within the joint element 109. The fixed joint lever 103 or the 
rotating joint lever 109 are respectively suitable for use with live bait 
or artificial bait. 
An important improvement made in this invention lies in the bobber main 
body 101 as shown in FIG. 8. The bobber main body 101 is generally 
conically contoured and is a stream-lined bar which tapers from an upper 
to a lower section with cross-sections from upper to lower positions being 
stream-lined. As shown in FIG. 10, there is provided a cross-sectional 
view of the bobber main body 101 taken along section lines 10--10 of FIG. 
7. The width to length ratio of the stream-lined section is approximately 
1:3.5-4. The lower portion 111 of the main body 101 is a partially cut off 
section which is contoured in a direction reverse to the contour of the 
section of the upper portion 110. The coefficient of resistance is 
minimized when the width and length of a stream line is rated as 1:3.5-4. 
Therefore, when there is a flowing motion or a fixed directional speed of 
fluid, the main body 101 turns its stream-lined face to the flowing motion 
direction and creates a minimal coefficient of resistance. 
Water resistance and wind forces on the water surface will create a force 
impulse upon the bobber 10, especially when the wind has a discontinuous 
force of varying direction applied to the bobber 10. The bobber 10 easily 
oscillates, falls, and turns eccentrically under such conditions. As shown 
in FIG. 11, the stream-lined cross-section of the lower end portion 111 is 
cut off to form an inward arc which extends downwardly in a substantially 
straight line to joint member 103 and thus forms a stream-lined section of 
lower portion 111 in a reverse direction to the upper section 110 contour 
of the main body 101. 
This arc is located on one side of the end portion of the bobber main body 
101 and beneath the upper end a distance of five times as long as the 
width of the cross-section from the top of the main body 101. The lower 
portion 111 is wider and longer than the upper portion 110 of the 
stream-lined section and is formed in a reverse direction. The lower 
portion 111 is half as long as the upper portion 110. The design of these 
stream-lined sections has a low resistance in the water because of its 
better stream line and raises the center of buoyancy of the main body 101 
and thus makes the bobber more stable. 
More particularly, when the main body 101 is forced to float eccentrically, 
some water will flow through and thus balance the negative pressures on 
the back of the bobber 10 and forces the stream-lined bobber to return to 
its proper direction and position. The main body 101 displaces its 
stream-lined section to face the flowing water so as to maintain the 
smallest force of resistance. Though there are discontinuous forces from 
varying directions, the bobber 10 rotates on its axis and maintains itself 
upright and stable. The drawback of a conventional bobber relating to 
oscillation is alleviated. 
As shown in FIG. 7, the top portion 110 of main body 101 is an arc which 
ends at a point adjacent to the center and the lower portion 111 of the 
main body 101 is a stream-lined end portion which ends at a point adjacent 
to the joint member 103. 
As shown in FIG. 12, bobber 10 and joint rod 105 may be inserted into a 
positioning sleeve 13 to fix the bobber 10 on the fishing line 12. When 
color-striped post 102 is struck by waves or blown by the wind as shown by 
element P in FIG. 12, the main body 101 will turn to face the waves and 
the wind due to the fact that upper portion 110 has a stream-lined 
section. When the force of waves and wind makes the body 101 oscillate and 
fall, the reverse stream-lined section of its lower portion 111 will 
provide a negative pressure for the main body 101 as shown by element -P 
in FIG. 12 to return to its normal position. 
Because resistance force in water and wind on the water surface will 
provide a force impulse on the bobber 10, the wind will have discontinuous 
forces of varying direction applied to bobber 10 and the bobber oscillates 
and turns eccentrically. 
A plurality of pressure-balancing holes 104 are formed at one side of the 
end portion of the bobber main body 101. Because the main body 101 has 
holes 104, the volume of its lower portion can be reduced and the center 
of buoyancy of the main body 101 is raised and thus makes the bobber more 
stable. 
More particularly, when main body 101 is forced to float eccentrically, 
some water will flow through the holes 104 and to the back of the main 
body 101 and balance the pressure in the back and thus makes the 
stream-lined section return to its proper position. The main body 101 
returns its stream-lined section to face the flowing motion of the fluid 
and maintains the smallest resistance force. Though there is a 
discontinuous force from varying directions, the bobber 10 only rotates 
and maintains itself upright and stable. 
The combination of joint lever 100, round post 108, and joint element 109 
for another embodiment of this invention is designed for using artificial 
bait, because the joint lever 100 can rotate within the joint element 109. 
The fixed joint lever 103 is suitable to be used for live bait, but the 
rotating joint 109 is suitable for artificial bait.