Illumination – Self powered lamp – Cylindrical flashlight casing
Reexamination Certificate
2000-06-07
2001-11-20
Cariaso, Alan (Department: 2875)
Illumination
Self powered lamp
Cylindrical flashlight casing
C362S196000, C362S202000
Reexamination Certificate
active
06318879
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a two-part flashlight controllable by rotation, and especially to a flashlight using an LED lamp bulb and suitable specifically for use with articles carried on one's person, it is structurally simpler and stronger, and is convenient for operation.
2. Description of the Prior Art
In a conventional flashlight, a lamp bulb using a tungsten filament and conventional batteries are convenient for holding, however, such a conventional flashlight has quite a large volume and is inconvenient for carrying. While a conventional miniature flashlight only has a length of about 3-5 cm and a diameter of about 1.5-2.0 cm, it is convenient for put together with things carried on one's person such as keys.
In the recent years, semiconductors have been being continuously well developed; they can be made to have LED's of various colors without filaments, and can provide large and even super brightness. Such LED's with small volumes certainly can make the abovementioned miniature flashlight.
A conventional flashlight with a lamp bulb using a tungsten filament is provided with a threaded metallic sleeve on one end thereof to connect by screwing with a lamp seat having an inner thread. While an LED available now has two pins thereof exposed, when it is used for a flashlight, the connecting structure for the lamp seat must be completely different. A flashlight with such an LED available now is shown in
FIG. 1
, and is comprised of a cylindrical main body
10
, a hood
11
is connected and locked on the top of the cylindrical main body
10
, and a bottom cover
12
is provided on the bottom of the cylindrical main body
10
; sequentially, there are a spring
13
, an insulation sleeve
14
, a set of batteries
15
, a lamp seat
16
, an LED
17
and a reflective cover
18
provided in the cylindrical main body
10
. Wherein, two pins
171
,
172
of the LED
17
can be inserted into the corresponding holes
161
,
162
of the lamp seat
16
which can control on/off of the LED
17
by bouncing raising or lowering of the acting pieces
163
,
164
movably mounted thereon. The flashlight of such a structure must have its battery set
15
changed at the bottom thereof, and turning on/off of the LED
17
is controlled with the hood
11
, thereby, it must have three parts, i.e., the cylindrical main body
10
, the hood
11
and the bottom cover
12
. It is more complicated structurally, its length cannot be reduced further more, and the lamp seat
16
is very hard to manufacture by virtue that it shall cooperate with the LED
17
and the acting pieces
163
,
164
. Thereby, it is unstable in activating.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a two-part flashlight controllable by rotation; the length of the flashlight contains a cylindrical main body and an end cover both being provided with a thread for adjustment and connecting. The end cover is provided therein with a lamp cover and a related lamp hood for a light emitting diode. The hollow interior formed from the cylindrical main body and the end cover can be placed therein a battery set and a controlling switch to abut against the light emitting device. A stem like spring seat provided in the controlling switch can control turning on/off of the LED by screwing tight or unscrewing of the end cover relative to the cylindrical main body. Thereby, such an LED flashlight can be minimized by virtue that it uses only two parts, and structural strength thereof can be increased to be resistive to damage by dropping.
The light emitting device can cooperate with another metallic pipe provided in the end cover to position a reflective cover of another LED.
The closed end of the above cylindrical main body can be mounted thereon a connecting member to be mounted on a related article.
The present invention will be apparent in its novelty and features after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.
REFERENCES:
patent: 4851974 (1989-07-01), Maglica
patent: 4949231 (1990-08-01), Wang
patent: 5560705 (1996-10-01), Shiau
patent: 6224236 (2001-05-01), Shu
Cariaso Alan
Dougherty & Troxell
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