Magnifying device worn around head

Details Magnifying device worn around head Magnifying device worn around head

2001-10-30

2003-02-25

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With viewed object or viewed field illumination

C351S041000

Reexamination Certificate

active

06525887

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates generally to an optical instrument, and more particularly to a magnifying device that is worn around head.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a magnifying device of the prior art comprises a fastening base
11
which is provided in the underside of one end thereof with two retaining seats
13
for retaining two projections
17
of a magnifying lens
15
. The fastening base
11
is provided at the rear end with a headband
19
fastened therewith. The fastening seat
11
is further provided with a light-emitting body
21
which is pivoted to the fastening seat
11
by a pivoting portion
23
.
Such a prior art magnifying device as described above is defective in design in that the retaining seats
13
are susceptible to fatigue after a prolonged use of the device, and that the light-emitting body
21
can not be detached to use as a flashlight, and further that the headband
19
is not user-friendly. In addition, the prior art magnifying device is provided with the A
4
battery serving as power source of the light-emitting body
21
. The A4 battery is relatively heavy, thereby giving an added weight to the magnifying device. It is conceivably uncomfortable to wear a heavy magnifying device around one's head. Moreover, the A4 battery is a potential source of the environmental pollutant.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a magnifying device which is designed to wear around one's head and is free of the deficiencies of the prior art device described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a magnifying device comprising a fastening base, two hoops, a magnifying lens, and a light-emitting body. The magnifying lens is securely pivoted to the fastening base. The light-emitting body can be detached for use as a flashlight. The present invention makes use of the lithium battery as power source of the light-emitting body. The lithium battery is relatively light in weight and greater in longevity. The present invention can be worn around one's head or removed from one's head with ease and speed.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.


REFERENCES:
patent: 3945712 (1976-03-01), Crock et al.
patent: 5715030 (1998-02-01), Quaresima
patent: 6087660 (2000-07-01), Morris et al.
patent: 6116729 (2000-09-01), Huang

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