Electricity: battery or capacitor charging or discharging – Cell or battery charger structure – Having plug for a-c receptacle
Reexamination Certificate
2001-01-23
2001-08-14
Tso, Edward H. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Cell or battery charger structure
Having plug for a-c receptacle
C439S131000
Reexamination Certificate
active
06275002
ABSTRACT:
FIELD OF INVENTION
This invention is related to a rotary charging plug structure of a charger, in particular to one that uses a blade base integrally formed by riveting blades to a shaft so as to prevent the blades from disengagement upon experiencing a frontal or a lateral impact.
BACKGROUND OF INVENTION
A conventional rotary charging plug structure of a charger, such as that disclosed in ROC (Taiwan) Patent Application No. 82201253 entitled “Improved Rotary Charging Plug Structure of a Charger” (as shown in FIGS.
1
and
2
), mainly comprises a housing
100
having walls, and a plug structure
200
. The housing
100
includes a substantially L-shaped notch
110
that is formed with openings
120
. The two openings
120
are formed therebetween with a receiving slot
130
for receiving an urging element
140
. The receiving slot
130
is formed at a bottom thereof with a blind hole
150
at a location corresponding to where the urging element
140
is provided. The blind hole
150
may be provided with a spring
160
therein. The urging element
140
is further formed at an outer end thereof with a semi-circular protrusion
141
. The plug structure
200
includes a horizontal shaft
210
, two coupling plates
220
, and blades
230
. The coupling plates
220
and the shaft
210
are integrally joined to one another by riveting so as to allow free rotation with respect to one another. The coupling plates
220
are inserted and retained within the notch
110
of the housing
100
. The horizontal shaft
210
is inserted between the two coupling plates
220
and blades
230
. The horizontal shaft
210
is formed with keyways
210
at each of opposing ends thereof for engaging with another ends of the blades
230
and rotating along with the blades
230
. The horizontal shaft
210
is formed with a semi-circular groove
211
at a location corresponding to the semi-circular protrusion
141
of the urging element
140
so as to prevent the semi-circular groove
211
and the semi-circular protrusion
211
from disengagement when the horizontal shaft
210
rotates along with the blades
230
about a tip of the semi-circular protrusion
141
.
The above structure, however, consists of the following disadvantages:
1. Because the horizontal shaft is inserted after the coupling plates are integrally joined to the blades by riveting, a frontal or a lateral impact applied to the blades may cause disengagement of the semi-circular protrusion
141
, the spring
160
, or the keyways
212
thereby causing inconvenience in use.
2. Such a structure consists a great number of components, which increases manufacturing cost arisen from production, component management, and assembly.
3. In use, the blades must be directly inserted into the slots of a receptacle; any slight deviation in orientation may cause the blades to flip upwards to their storage positions thereby causing much incontinence.
4. Due to prolonged use, the indoor or outdoor humidity may result in elastic deformation or rust of the spring thereby causing failure of its original function.
In view of the above disadvantages, multiple trails and experiments are performed to obtain the rotary charging plug structure of a charger of this invention.
SUMMARY OF INVENTION
It is a primary object of this invention to provide a rotary charging plug structure of a charger, using a blade base by integrally riveting blades to a shaft and support provided by a rear lid, so as to prevent the blades from disengagement upon experiencing a frontal or a lateral impact, and to eliminate failure caused by environmental humidity.
It is another object of this invention to provide a rotary charging plug structure of a charger having a simple, easily assembled structure so as to reduce manufacturing and assembly cost.
It is a further object of this invention to provide the blades with three retaining positions so as to facilitate easy application.
In order to achieve the above objects, this invention discloses a rotary charging plug structure of a charger, comprising: an upper lid to be matched with a lower lid so as to receive a circuit board therein, the lower lid being provided with a receiving chamber therein for receiving a blade base. The receiving chamber is provided on each of opposing sides thereof with a U-shaped notch for receiving a shaft. The U-shaped notch and an inner wall of the receiving chamber jointly form a groove for receiving a conductive plate. The receiving chamber is provided with clamping blocks at an upper end and a
-shaped through-hole at a lower end thereof for urging against a stop block of the blade base and for retaining unto a flange of the rear lid. The blade base is provided with two blades at a front end thereof, and the shafts at each of opposing ends thereof. The shafts are each formed with an annular grove at a top end thereof. The blade base is made by integrally riveting the blades to the shafts and includes the two stop blocks and a protruding block. The two conductive plates are wired to the circuit board. Each of the conductive plates is provided at a front end thereof with a semi-circular through-hole for being riveted to the annular groove of the shaft. The rear lid covers and urges against the blade base after placing the blade and the conductive plates into the receiving chamber. The rear lid is provided with a through-hole at each of opposing ends thereof, through which through-holes the conductive plates penetrate. The rear lid includes a guide block at a center thereof to allow sliding movement of the protruding block of the blade base. Each of the through-holes and the guide block are provided with a push block therebetween for urging against the shafts.
As such, the blades can be rotated within a 90° range. Further, the blades are prevented from disengagement upon experiencing a frontal or a lateral impact. This invention is also simple in its structure so as to reduce the manufacturing and assembly cost.
REFERENCES:
patent: 4922178 (1990-05-01), Matuszewski et al.
patent: 5057381 (1991-10-01), Persen
patent: 5525888 (1996-06-01), Toya
patent: 5635814 (1997-06-01), Afzal et al.
patent: 5684378 (1997-11-01), Furth et al.
Pro-Techtor Inter-national Services
Son Kon Co., Ltd.
Tso Edward H.
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