Patent Application
20060040227
1. Field of the Invention
The present invention relates generally to a gas stove and more particularly to an ignition switch of the gas stove.
2. Description of the Related Art
A conventional ignition switch mounted in a gas stove has a closed device and an electromagnetic valve. While user turns a knob of the stove, it drives a shaft of the closed device pushing a plug of the electromagnetic valve for gas flowing to a burner of the stove for burning. After that, a heater, which electrically connects the electromagnetic valve, generates current to activate the electromagnetic valve according to the heat of the burner.
In the conventional ignition switch, the electromagnetic valve is arranged next to the closed device, so that the ignition switch has a greater length. As a result, the stove has to provide sufficient length in height or in width to receive the ignition switch. In other words, the conventional ignition switch makes the stove large.
For an improved ignition switch, the electromagnetic valve is arranged perpendicular to the closed device to reduce the length thereof. Typically, there are two types of that. First, a coupler is provided to connect the shaft of the closed device and the plug of the electromagnetic valve. The plug of the electromagnetic valve is activated by the shaft of the closed device via the coupler while the knob is turned. The ignition switch has to change the orientation of the gas channel, so that the switch is totally different from the conventional switch and that increases the cost. Second, a transmission device is provided to connect the knob and the electromagnetic valve. The electromagnetic valve is activated by the knob via the transmission device. The transmission device is installed independently that might be easy to be impacted and damaged in assembly. There is no ignition switch in the present market without any drawback.
The primary objective of the present invention is to provide an ignition switch of a gas stove, which the gas channel is kept as the conventional one and the transmission device will not be impacted and the length of the switch is decreased.
According to the objectives of the present invention, an ignition switch comprises a switch member, a knob, an electromagnetic valve and a driving device. The switch member has a closed device therein and a chamber in which the driving device is received. The knob is provided on the switch member for driving the closed device. The driving device connects the knob and the electromagnetic valve, whereby the electromagnetic valve is activated while the knob is pressed.
As shown in
The switch member 12 has a base 22 and a cap 24. The base 22 has a gas inlet 221, a gas tube 222, a first gas tube 223, a second gas tube 224, a receiving tube 225 and a cone valve chamber 226. The base 22 further has a chamber 26, which has a first chamber 28 on a top thereof, a second chamber 30 communicated with the first chamber 28 and the receiving tube 225 and a order hole 31 communicated with the first chamber 28. The closed device 13 is mounted in the valve chamber 226, the electromagnetic valve 16 is mounted in the receiving tube 225 and the knob 14 is mounted on the cap 24.
The switch 10 of the present invention further comprises a driving device 18 mounted in the chamber 26, which has a driving member 32, a transmission member 34 and a pushing member 36.
The driving member 32 has a main member 40 on which a hole 42 is provided to fit a shaft 38 of the knob 13 and a pressing portion 44 projected from the main member 40.
The transmission member 34 has a beam 46 and an elastic device 48. The shaft 46 is inserted in the first chamber 28 having a post 50, a first block 52 at a bottom end of the post 50 and a second block 54 at a top end of the post 50 to be connected to the pressing portion 44. The elastic device 48 is a spring 48 fitted to the post 50 between the second block 54 and a pad plate 56 mounted in the order hole 31. An O-ring is mounted in the order hole 31 connected to a bottom thereof. The O-ring 58 is fitted to the post 50 to prevent gas from leakage out of the first chamber 28.
The pushing member 36 is received in the second chamber 30 having a barrel-like base portion 60, a pushing portion 62, a plug 161 on the base portion 60 to be connected to the electromagnetic valve 16, a positioning portion 64, which is a slot, and an inclined stop portion 66 in the positioning portion 64. The first block 52 of the beam 46 is connected to the stop portion 66 and is restricted by the positioning portion 64, so that the first block 52 is restricted between the stop portion 66 and the positioning portion 64.
As shown in
The ignition switch 10 of the present invention, under a circumstance of not changing the gas channel of the conventional ignition switch, provides the chamber 26 and the driving device 18 in the switch member 12 and beside the closed device 13 to control the electromagnetic valve 16. To compare with the conventional ignition switch as described above, the ignition switch 10 of the present invention has a shorter length, which helps the stove to decrease the size thereof and to use the space in the stove more flexible. In addition, the present invention has less components to prevent the transmission device form being impacted and damaged.
As shown in
The scope of the ignition switch of the present invention should not restricted in the specification and the drawings. The present invention can be applied to any type of stove.
In conclusion, the ignition switch of the present invention still applies the conventional switch member and the electromagnetic valve under the circumstance of not changing the gas channel of the conventional ignition switch and has a shorter length, which helps the stove to decrease the size thereof and to use the space in the stove more flexible. In addition, the present invention prevents the transmission device form being impacted and damaged.
