Electric heating – Microwave heating – With control system
Reexamination Certificate
2000-08-21
2001-10-09
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
With control system
C219S720000, C219S739000, C219S506000, C126S200000
Reexamination Certificate
active
06300609
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a door to a microwave oven, and more particularly, to a door to a microwave oven, having a controller integrated thereto.
2. Background of the Related Art
In general, in a frontal surface of the microwave oven, there are an output part for indicating various information thereon and an input part for a user to provide a required cooking time period and the like to the microwave oven, both of which are electrically connected to a circuit board. That is, the circuit board is provided with a work order from the user through the input part, to control various electric components, such as a magnetron, and present various information to the output part. In the meantime, of the microwave oven, one mounted over a heating apparatus, such as a gas range, is so called a wall mounting type microwave oven, which is required to discharge a cooking heat and a heat generated at the electric components in the microwave oven to outside of the microwave oven, smoothly. A related art wall mounting type microwave oven will be explained, with reference to FIG.
1
.
A body
10
of the related art wall mounting type microwave oven is mounted on a wall
1
, which has a door
20
in a front face thereof for selectively opening/closing a cooking chamber. There is a vent grill
40
in an upper portion of the door
20
for discharging odor and heat and the like to outside of the microwave oven, and a control part
30
on one side of the door
20
. That is, the door
20
and the control part
30
are mounted to the body
10
, separately. As shown in FIG.
2
, the door is provided with a door panel
21
forming an overall frame ol the door, a front panel
22
of transparent glass fitted to a front face of the door panel
21
, and a door frame
23
spaced a distance from the front panel
22
to form a rear face of the door.
The control part will be explained with reference to FIG.
3
. The control part
30
is provided with a key pad
31
, a control panel
32
, a bracket
33
, and a circuit board
34
assembled in an order starting from the front face of the body
1
to the rear face thereof. The circuit board
34
is electrically connected to electric components, such as the magnetron(not shown). The key pad
31
has a plurality of selection buttons
31
a
for a user to select cooking power, cooking time period, and the like, connected to the circuit board, electrically. There is an ICD
34
a
integrated to the circuit board
34
for displaying various information, and passed through the bracket
33
, control panel
32
, and the key pad
31
, such that the LCD
34
a
is exposed to outside of the microwave oven for the user to notice the various information displayed thereon.
As shown in
FIG. 4
, in the foregoing related art wall mounting type microwave oven, the LCD in the output part, and the key pad in the input part are positioned above a height of eyes of the user, to require the user's eyes to look upward and the user's hand to direct upward in handling the key pad, that are not convenient for the user. This problem is caused by the mounting of the control part on one side of the door, limiting a mounting position of the control part.
The problem becomes more serious when the microwave oven is of a type to be mounted above a user's height, such as the wall mounting type microwave oven. And, it is required to solve this problem taking the fact that use of the wall mounting type microwave oven is increased gradually into account. As one of methods for solving the problem, U.S. Pat. No. 4,255,640 discloses a microwave oven, wherein the control part is mounted, not on the body of the microwave oven, but on the door. However, the U.S. Pat. No. 4,255,640 fails to solve the problem because the control part is mounted to an upper portion of the door that requires the user's eyes and hand to direct upward.
And, the U.S. Pat. No. 4,255,640 requires the control part on the door to connect an electrical component with one cable. Therefore, the cable should be comparatively long, which is not convenient for transportation of the door for assembly to the body, and has a possibility of damage during the transportation. Moreover, it is difficult of disassemble the door only from the body once the door assembly to the body is completed. Accordingly, disassembly of the door only is difficult in a case of trouble of the control part and the like, and the microwave oven itself should be dismounted from the wall, and an outer case of the microwave oven should be removed, for disassembly of the door.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a door to a microwave oven that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a door to a microwave oven, which can improve convenience of use.
Other object of the present invention is to provide a door to a microwave oven, which can improve assembly work and servicing work.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the door to a microwave oven includes a door panel which forms a frame of the door, a front panel fitted to a front face of the door panel, a door frame fitted to rear face of the door panel, and a control part fitted between the front panel and the door frame for receiving a work order from a user, controlling an electric component, and indicating various information.
The control part includes a circuit board, a conduction switch fitted between the circuit board and the front panel for sensing a user's work order and transmitting the work order to the circuit board, and an LCD electrically connected to the circuit board for indicating various information.
The control part and the electric component are connected with a first cable connected to the control part and a second cable connected to the electric component.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 4255640 (1981-03-01), Bressler
patent: 38 29 913 (1990-03-01), None
patent: 59-60128 (1984-04-01), None
patent: 60-42516 (1985-03-01), None
patent: 9-14673 (1997-01-01), None
Leung Philip H.
LG Electronics Inc.
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