Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate
1999-08-18
2001-04-10
Epps, Georgia (Department: 2873)
Optical: systems and elements
Lens
With viewed object or viewed field illumination
C002S417000
Reexamination Certificate
active
06215601
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a head belt of head magnifying glass, and more particularly to an easy adjustable and more durable head belt construction.
With the quick development of industries in recent years, every industry gradually tends to the practical development of reducing volume and enabling all-around functions of products. Almost any industry such as precise electronic industry, precise mould manufacturing industry, seal caving industry, composing and typing industry, precise spring, etc., all develops towards said direction without exception. In the course of manufacturing of those precise industries workers have to use head magnifying glass to magnify work piece for easy processing.
FIG. 1
shows a conventional head magnifying glass
10
. A first head belt
20
and a second head belt
30
stretch backward from each side of fixer
102
for fixing magnifying glass
101
, respectively. A female sticking belt
201
is sewed up on the inner side of the first head belt
20
, while a male sticking belt
301
is sewed up on the outer side of the second head belt
30
. When the male sticking belt
301
is made stick to the female sticking belt
201
, the first belt
20
and the second head belt
30
get fixed together, forming a ring putting fast on the user's head and enabling him to process the work piece which is magnified by the magnifying glass
101
on fixer
102
. However, because of the different sizes of heads of users as well as sticking up and/or coming off of male sticking belt
301
and female sticking belt
201
while putting on and/or taking off the magnifying glass, villus on male sticking belt
301
and female sticking belt
201
will come off and become less through repeated use, leading to low sticking effect. As a result, the first head belt
20
and the second head belt
30
can not be combined closely and thus lose their effect. For this, the user has to get a new head belt for replacement, and surely, this is disadvantageous in use.
SUMMARY OF THE INVENTION
The major object of the invention is to provide a modified head belt of head magnifying glass to resolve the problem stated above. A movable plate is set up on the buttoning hole made on the first head belt. It separates from the buttoning hole due to lever movement while pressing its one end, and it remains buttoned up well with the buttoning hole when it is not pressed down. After repeated operation of combining and separating the movable plate and buttoning hole, nice buttoning is still kept so that convenient adjustment and longer duration of head belt are achieved.
The object of the invention is carried out by providing a head belt of head magnifying glass, wherein a first head belt and a second head belt stretch backward from each side of the fixer of head magnifying glass respectively.
More than one vertical buttoning holes are made at certain space along said first head belt.
A stretching out buttoning seat is set up at certain place of said second head belt with a vacancy formed between said buttoning seat and the second head belt; a through hole is made at the inner end of buttoning seat and a movable plate is fixed on the buttoning seat; said movable plate is pivoted by the part near the middle of each side of buttoning seat; a clamping key is established at one end of the movable plate corresponding the through hole of the buttoning seat and a spring plate is set up at the other end of the movable plate.
This allows the first head belt to be inserted into the vacancy between the second head belt and the buttoning seat, and by utilizing the clamping key of the movable plate penetrating the through hole of the buttoning seat to button up in the buttoning hole of the first head belt, the first and second head belts are closely combined. As said movable plate is pivoted at the buttoning seat, when its outer end is pressed down, it is able to revolve with the pivoted part as its fulcrum to have the end where the clamping key is placed rise so that the clamping key separates from the buttoning hole of the first head belt so as to allow the first head belt to adjust its position along the second head belt or separate from the second head belt. Thus the object of easy adjustment and durable effect is acquired.
There is a binding sleeve on the second head belt used to bind the end of the first head belt.
A pivot axle is built on each side of the movable plate near its middle and said pivot axle is inserted in the pivot hole on each side of the buttoning seat to make the movable plate combined with the buttoning seat
Said first head belt and said second head belt are respectively pivoted at the end of one of the two sides of the fixer of head magnifying glass.
The beneficial effect of adopting the above-mentioned technical scheme is apparent: Since said head magnifying is in the shape of a ring by buttoning up the first and second head belts, it allows adjusting the size of combined ring according to the needs of users and/or separating them from each other. Besides, as the first and second head belts of said head belt are inked linked together by means of a buttoning movable plate, such construction will keep very nice buttoning effect after many times of separating and buttoning. So that the efficacy of elongating the duration of use of the head belt is achieved.
REFERENCES:
patent: 5431365 (1995-07-01), Feng
patent: 5467508 (1995-11-01), Feng
patent: 5844656 (1998-12-01), Ronzani et al.
patent: 6116729 (2000-09-01), Huang
Epps Georgia
GEM Optical Co., Ltd.
Huang Jiawei
J C Patents
Seyrafi Saeed
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