Joints and connections – Interfitted members
Reexamination Certificate
2000-03-30
2001-11-27
Browne, Lynne H. (Department: 3629)
Joints and connections
Interfitted members
C280S279000, C074S551100
Reexamination Certificate
active
06322283
ABSTRACT:
BACKGROUND OF THE INVENTION
1. a) Technical Field of the Invention
The present invention relates to a connection structure for a head tube and a handle securing rod of a bicycle, characterized in that a connection block is secured at a jacket within the head tube, and the center of the connection block is provided with a screw hole, and the head tube is mounted to the connection ring tube of the handle securing rod for the mounting of a securing element to the screw hole of the connection block, and the head tube and the handle securing rod are joined to form as a unit. This will avoid damage caused by friction at the inner wall of the head tube.
2. b) Description of the Prior Art
As shown in
FIG. 1
, a conventional securing element
1
includes a nut head
11
, a screw rod
12
, a top block
13
, an extension ring
14
and an urging block
15
. The bottom side of the top block
13
is an inverted conic shaped ring body. After the screw rod
12
has inserted into the center hole of the top block
13
, the top circumferential face of the top block
13
is then screwed at the center hole. The bottom end of the screw rod
12
is an extension from the lower section of the top block
13
. The center hole of the extension ring
14
is located near to the conic ring body of the bottom end of the top block
13
. The screw rod
12
passes through the top block
13
and the extension ring
14
and is secured at the urging block
15
.
FIG. 3
shows the mounting of the head tube
2
and the handle securing rod
3
to form as a unit. In this case, the extension from the extension ring
14
causes the head tube
2
and the handle securing rod
3
to mount together so that the end head of the securing rod
3
can be easily provided with a handle.
FIG. 4
is another type of conventional securing element
4
including a screw rod
41
, a nut ring
42
, a spring
43
, a pad
44
, a ring tube
45
, a bottom ring tube
46
and a screw body
47
. The circumferential face of the top ring tube
45
has a recessed shape and that of the bottom ring tube
46
is protruded, and the corresponding ends of the two ring tubes
45
,
46
have a sloping shape. The screw rod
41
passes through the nut ring
42
, the spring
43
, the pad
44
, the top ring tube
45
and the bottom ring tube
46
in sequence, and then is secured at the screw body
47
to form as a unit. In application, as shown in
FIG. 5
, when the screw rod
41
rotates, the screw body
47
rotates upward and a pushing force is exerted onto the top ring tube
45
and the bottom ring tube
46
. This will cause the corresponding ends to extend radially and the circumferential face urges the tube wall of the head tube
2
. As shown in
FIG. 6
, the end head of the handle-bar securing rod
3
is mounted with the handle.
The drawback of the conventional securing element
1
by means of the radially extended securing element is that the vibration caused by a bumpy road is concentrated at the head tube of the bicycle. The stress thus formed will break the securing element
1
and the tube wall, and the securng effect is inefficient. In some cases, the handle securing rod
3
may be dislocated from the head tube.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a connection structure for a head tube and a handle securing rod of a bicycle, characterized in that a connection block is secured at a jacket within the head tube, the center of the connection block is provided with a screw hole, and the head tube is mounted to the connection ring tube of the handle securing rod for the mounting of a securing element to the screw hole of the connection block, and the head tube and the handle securing rod are joined to form as a unit
Yet another object of the present invention is to provide a connection structure for a head tube and a handle securing rod of a bicycle, wherein the dislocation of the handle secuing rod from the head tube can be prevented.
Another object of the present invention is to provide a connection structure for a head tube and a handle securing rod of a bicycle, wherein the strength of the head tube is improved.
The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
REFERENCES:
patent: 5201242 (1993-04-01), Chi
patent: 5209138 (1993-05-01), Shu
patent: 5492033 (1996-02-01), Hopey
patent: 5782479 (1998-07-01), Adams et al.
patent: 5810380 (1998-09-01), Lin
patent: 5924714 (1999-07-01), Farris et al.
patent: 6145637 (2000-11-01), Hopey
A & J
Browne Lynne H.
Walsh John B
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