Binocular with adjustable bodies

Details Binocular with adjustable bodies Binocular with adjustable bodies

2000-11-06

2001-11-27

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Compound lens system

Telescope

C359S410000, C359S416000

Reexamination Certificate

active

06323997

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a binocular having two bodies and a bridge joining the bodies and, more specifically, to such a binocular in which the two bodies each have a row of knuckles respectively pivoted to the respective knuckles at two sides of the bridge.
2. Description of the Related Art
A regular binocular, as shown in
FIG. 1
, is generally comprised of two bodies
2
and a bridge
1
joining the bodies
2
. The bodies
2
each comprise a coupling block
20
respectively coupled to the bridge
1
. The bridge
1
comprises two front recessed portions and two rear recessed portions. The coupling block
20
of each body
2
comprises a screw hole
204
disposed at the front side, and a recessed portion disposed near the rear side and aimed at the screw hole
204
. Two first steel balls
12
are respectively mounted in the recessed portions of the coupling blocks
20
of the bodies
2
and the rear recessed portions of the bridge
1
. Two second steel balls
14
are respectively mounted in the front recessed portions of the bridge
1
and aimed at the screw holes
204
of the coupling blocks
20
of the bodies
2
. Two holding down screws
22
are respectively threaded into the screw holes
204
of the coupling blocks
20
of the bodies
2
to hold down the second steel balls
14
in the front recessed portions of the bridge
1
. When assembled, the bodies
2
can be turned relative to the bridge
1
to adjust their angular position. The binocular further comprises a central focusing wheel
16
revolvably mounted in the bridge
1
, a screw rod
18
threaded into the central focusing wheel
16
and disposed between and in parallel to the bodies
2
, and a connecting block
19
fixedly fastened to the screw rod
18
and connected between the lens systems
24
of the bodies
2
. When rotating the central focusing wheel
16
, the screw rod
18
is driven to move the connecting block
19
forwards or backwards relative to the central focusing wheel
16
, and therefore the lens systems
24
of the bodies
2
are moved with the connecting block
19
axially in the bodies
2
to adjust the focusing of the binocular. According to this design, the contact area between the bridge
1
and the coupling blocks
20
of the bodies
2
is limited to few points (the steel balls), i.e., the steel balls
12
and
14
and the holding down screws
22
support the whole gravity of the binocular. When the binocular receives an impact, the connecting area between the bridge
1
and the coupling blocks
20
of the bodies
2
tend to be broken. In order to eliminate this problem, the coupling blocks
20
of the bodies
2
and the bridge
1
must be made of material of high structural strength. However, the use of high structural strength material greatly increases the cost of the binocular. Further, the processing of the recessed portions of the bridge and the coupling blocks of the bodies requires high precision, and the steel balls may fall out of the recessed portions during installation. Because the complicated processing and installation procedure consumes much time and labor, the manufacturing cost of this structure of binoculars is high.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a binocular, which is strong and durable in use. It is another object of the present invention to provide a binocular, which is inexpensive to manufacture. According to the present invention, the binocular comprises a bridge, the bridge having two rows of knuckles aligned at two opposite lateral sides thereof, two bodies respectively pivoted to the bridge at two sides, the bodies each having a row of knuckles respectively coupled to the knuckles of the bridge, and two pivot bolts respectively fastened to the knuckles of the bridge and the knuckles of the bodies to couple the bodies to the bridge, for enabling the bodies to be turned relative to the bridge to the desired angle. Because each body has multiple knuckles arranged in a row and connected to respective knuckles at the bridge by a pivot bolt, the connecting area between the bodies and the bridge is strong.


REFERENCES:
patent: Re. 30665 (1981-07-01), Altenheiner et al.
patent: D. 425922 (2000-05-01), Huckenbeck
patent: 4030808 (1977-06-01), Hornschu et al.
patent: 4186992 (1980-02-01), Kamaura
patent: 4325602 (1982-04-01), Lange
patent: 4463252 (1984-07-01), Brennan et al.
patent: 4659194 (1987-04-01), Swartz
patent: 2326088 (1974-11-01), None

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