JPH03230020A - Button switch operated gas valve - Google Patents

Abstract

PURPOSE:To provide ease of discrimination between the closed state and combustion state for improving the operability by providing a button switch controlling cam mechanism which controls a round button switch and a valve controlling cam mechanism which controls a main valve by operating the round button switch. CONSTITUTION:In closed state, a round button switch 4 is held at a press position S by a button switch control cam mechanism 8. When the round button switch 4 is pressed down to a pressed-down position T, a presser bar 22 is pressed down via a presser member 21 of a valve cam 11, a valve port 23 of a main valve 5 is opened, and a safety valve port 25 is opened by the tip of the presser bar 22. Gas flows from a gas inlet 1 to a gas outlet 2 through the valve ports 25 and 23. When the round button switch 4 is kept pressed, an electromotive force is generated on a thermocouple of safety valve 5 so that the valve 5 is kept open. When the round button switch 4 is released from pressing, the presser bar 22 and valve cam 11 are pushed back by a valve spring 28 and a cam spring 17, however, the main valve 5 is kept open because it is held at an intermediate position by a valve control cam mechanism 9. The round button switch 4 is pushed back by a button switch spring 30 and projected up to a position F by a button switch control cam mechanism 8.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention performs ignition, combustion, and extinguishing by pressing the operating round button in a manner that it appears and disappears, and adjusts the firepower by rotating the round button. This invention relates to a gas valve for automatic ignition.

[Prior Art] A gas valve that performs ignition, combustion, extinguishing, and adjustment of firepower by pressing and rotating a round button has been proposed by the applicant, as shown in Utility Model Application No. 63-51090.

[Problems to be Solved by the Invention] In such conventional gas valves, the push button is operated in a push-button manner, but the push button protrudes thickly in the closed state and reaches its deepest point in the combustion state. The button is pressed so that it is immersed in the cover, so there is a risk of accidentally pressing the button when the button is closed.
Furthermore, since the amount of protrusion of the button in the combustion state is small, there is a problem in that it is difficult to adjust the firepower by rotating the button.

Furthermore, when the button protrudes to a large extent so that it is easy to rotate the button in the combustion state, there is a problem in that it is difficult to distinguish between the combustion state and the closed state, making it difficult to judge visually.

The present invention has been made in view of the problems of the conventional technology, and its purpose is to make the button protrude to its maximum length in the combustion state and push in in the closed state. To provide a button-operated gas valve which eliminates the need to press a button carelessly, makes it easy to distinguish between a closed state and a combustion state, and improves the operability of the button.

[Means for Solving the Problems] In order to achieve the above object, the button-operated gas valve of the present invention can be moved in and out of a case body having a gas inlet and a gas outlet so as to be operated in both directions of insertion and rotation. A gas valve that is equipped with a round button provided in the main valve, a main valve that opens when the round button is pressed, an igniter switch, and a needle valve that limits the amount of gas outflow by rotating the round button. A button control cam mechanism that controls the button from the intermediate push-in position (closed position) to the deepest recessed position (ignition position) and the longest extended position (combustion position), and a round button that moves the main valve from closing to ignition and combustion. It is provided with a valve control cam mechanism that controls opening and closing to an opening degree corresponding to each state.

In addition, two control cam mechanisms are installed separately,
Preferably, each cam is provided in one independent cam case.

[Function] Figure 3 shows the closed state. In the closed state, the round button 4 is in an intermediate pushed-in position S and is held in this position by the button control cam mechanism 8.

When the round button 4 is pushed from the intermediate push-in position S in the closed state to the deepest retracted position T, the push rod 22 is pushed down via the button guide 20 and the push piece 21 of the valve cam 11, so the main valve 5 attached to the push rod 22 is pushed down. separates from the valve seat of the valve port 23 and opens the valve port 23. Roughly push down the safety valve 24 with the tip of the push rod 22 to open the safety valve valve port 25.

Gas flows in from the gas inlet 1, passes through the safety valve port 25, the valve port 23 of the main valve 5, and then flows out to the gas outlet 2.

At the same time, the switch push piece 2 branches to one end of the valve cam 11
At step 6, the igniter switch 6 is pressed via the actuator 27, so the switch is turned on, a high voltage generator (not shown) is activated, and the gas flowing out from the gas outlet 2 is ignited.

When the round button 4 is held down for a while, an electromotive force is generated in the thermocouple of the safety valve 5, and the safety valve 5 is held in an adsorbed state (open).

After this, when you release your hand from the round button 4, the pressure is released, so the push rod 22 and the valve cam 11 are pushed back by the valve spring 28 and the cam spring 17, but the valve control cam mechanism 9 stops them at an intermediate position. The main valve 5 remains open and enters the combustion state.

Further, the pressing of the switch 6 by the switch-on 26 is released and the switch 6 is turned off, so that the operation of the high voltage generation position is stopped.

On the other hand, the round button 4 is pushed back by the button spring 30, but at this time, the button control cam mechanism 8 causes it to protrude all at once to the longest protruding position F.

The gas flow rate is adjusted by rotating the round button 4. When the round button is rotated, the guide bin 31 rotates integrally while being guided by the inclined cam groove 32, so that the needle valve 7 moves back and forth in the front and rear directions. When the needle valve 7 retreats due to this movement, The needle passage 33 is wide open, and conversely, when moving forward, the passage 33 is closed. When the needle passage 33 is closed, gas flows through the needle control hole 3.
Only 4 will be distributed, and the firepower will be minimal.

The extinguishing operation is performed by pressing the round button 4 again.

When the button 4 is pressed, the button control cam mechanism 8 temporarily stops at a position slightly past the intermediate push-in position S, but when the button is released, it is pushed back to the intermediate push-in position S and stops at that position. For this reason, the push rod 22 is also pushed back to the closed position, so the main valve 5
is in a closed state and gas outflow from the gas outlet 2 is stopped.

Furthermore, since the electromotive force of the thermocouple disappears, the safety valve 2
4 automatically closes the protruding valve port 25 by spring pressure, and everything returns to the closed state shown in FIG. 3.

Next, the functions of the button control cam mechanism 8 and the valve control cam mechanism 9 will be explained with reference to FIGS. 4 and 5.

The button cam 10 and the valve cam 11 have heart-shaped guide grooves 15 for guiding the corresponding cam pins 13 and 14, respectively.
．． 16 and a locking part a controlling the pin in its groove.

It has b, c, d, e, f, g, and h.

The cam pins 13.14 fit into the respective grooves 15.16 and, in the closed position S of the button 4, fit into a, e.

If button 4 is now pushed in from this state, the button and valve cam 10.11 will be slid in the direction of arrow 18, so pins 13.14 of a and e are fitted into holes and f, and the position (ignition position T ) to stop.

When the button is released from the button at this position, the pins 13 and 14 are fitted from f to C0q by the movement of the cam and are held at that position (combustion position F).

In the button control cam mechanism 8, the round button 4 is at the longest protruding position F because the period from b to C is long, passing through the intermediate position a at once.

Furthermore, press the round button 4 again at this position, and press the pin 13 again.
．． The pins 13 and 14 are temporarily stopped at positions d and h, but when the button is released, the pins 13 and 14 are returned all at once from d and h to the original intermediate push-in positions (closed positions) S, c and e.

[Embodiment] The round button 4 is operated in the axial direction and rotational direction,
It is fitted and attached to the needle valve part of the case body 3 via a button spring 30, and a button guide 20 is provided on the front end surface. The button guide 20 is attached to the attachment frame 35 so that it can slide along with the round button 4 only in the axial direction, but is restricted in the rotational direction.

A stopper 36 is provided to protrude from a part of the frame 35.

This stopper is intended to abut the front surface of the button guide 20 when the round button is rotated to the child lock area, so that the round button cannot be pressed in the child lock area.

The push rod 22 to which the main valve 5 is attached is pushed via the push piece 21 when the round button 4 is pushed in with its rear end 22a facing the push piece 21 integrated with the valve cam 11.

Both button and valve control cam mechanisms 8.9 include a cam case 12, a button cam 10 and a valve cam 11 that are slidably fitted into the cam case 12, and a cam spring 17.18 that applies spring pressure in the projecting direction. It consists of cam pins 13, 14 that control the movement of each cam.

Both cams 10.11 have locking portions a, b consisting of heart-shaped guide grooves 15.16 and steps formed within the grooves.

It has C, d, e, f, C1, and h.

The cam pins 13 and 14 are formed by bending both ends of a wire into a hook shape, and the rear ends 13a and 14a are fixed to a part of the cam case 12 with ring springs 37 and 38, and the tip part 13b is fixed with the fixed part as a fulcrum. , 14b can swing horizontally and vertically.

These tips 13b and 14b are inserted into the window hole 39 of the cam case 12.
40 and is engaged with each cam 10.11 of the button and valve.

The cam case 12 has two tunnel-shaped square holes 1 on the left and right.
2a-12b are formed, and a button cam 10 and a valve cam 11 are slidably fitted into each of them.

This cam case 12 is made of hard plastic.
The two molded products are removably attached to the case body 3 with screws or the like.

The button cam 10 is integrally attached to the button guide 20 via a mounting plate 42 fixed with screws 41. Therefore, this button cam 10 always cooperates with the push-in and return of the round button 4.

[Effects of the Invention] Since the present invention has the above-described configuration, it produces the following effects.

■ The round button that operates the guy valve is configured so that it pops out to the longest protruding position in the combustion state and is held in the pushed-in position in the extinguishing (closed) state, so the button indicates combustion and extinguishing clearly. Moreover, careless button operations can be eliminated.

■ Since the button protrudes the maximum amount in the combustion state, it is easy to rotate the button to adjust the amount of gas.

■ Since the button operation and valve operation are performed by separate control cam mechanisms, they are not affected by the button movement.
The timing of combustion and extinguishing can be arbitrarily and accurately set.

■ Since each cam of each control cam mechanism for buttons and valves is housed in one cam case,
Optimum operation timing can be easily obtained without increasing component accuracy compared to separating and installing the parts separately.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view of the gas valve, Fig. 2 is a plan view, Fig. 3 is a vertical side view taken along line A-A in Fig. 2, and Fig. The figure is an exploded perspective view showing the parts of the cam mechanism that opens both sides of the button and valve.
The figure is an explanatory diagram of the operation of the valve cull, button cam, and cam pin relative to both cams. 1... Gas inlet 3... Case body 5... Main valve 7... Needle valve 8... Button control cam mechanism 9... Valve control cam mechanism 10... Button cam 12... Cam case 2...Gas outlet 4...Round button 6...Ignition switch 11...Valve cam 13, 14...Cam pin Special applicant: Shinryo Electric Manufacturing Co., Ltd.

Claims (2)

[Claims] (1) A round button 4 is provided on a case body 3 having a gas inlet 1 and a gas outlet 2 so as to be retractable so that it can be operated in both pushing and rotation directions, and a main valve that opens when the round button is pressed. 5, an igniter switch 6, and a needle valve 7 that restricts the amount of gas outflow by rotating the round button 4, a. A button control cam mechanism 8 that controls the retracted position (ignition position) T and the longest protruding position (combustion position) F; b) The operation of the round button 4 changes the main valve 5 from closed to open corresponding to each state of ignition and combustion. A button-operated gas valve, comprising: a valve control cam mechanism 9 that controls the valve to open and close at the same time; and a button-operated gas valve. (2) The button-operated gas valve according to claim 1, wherein the two control cam mechanisms 8 and 9 are separately provided together, and each of the cams 10 and 11 is provided in one independent cam case 12.