JPH0227332Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a push operation device mainly applied to an ignition operation device for gas appliances.

(Prior Art) The applicant of the present application has previously developed a device of this type, as seen in Utility Application No. 58-53494, in which an operating lever member can be pressed and operated from a starting end position to an end position against a return spring. According to the return operation by a spring of the operating lever member, a type with a locking member to be locked in the middle has been proposed, but in this case, the operating lever member is interposed in the gas passage connected to the gas burner. It is configured to open and close a gas valve and an ignition switch for actuating a spark plug adjacent to the burner, and the starting end position is in a closed state, the terminal position is in an ignition state in which the ignition switch is closed, and the intermediate position is in a closed state. In general, the formula is such that it can be obtained when the valve is open, and in such a formula, even when the operating lever member is released from the pressing position before the terminal position, that is, before the push-off, the equation is obtained even when the pressing operation is performed. The element is then locked by the locking element in the intermediate position, i.e. in the open position, so that the burner remains unlit and undesirably conducts gas.

This condition occurs in models equipped with an electromagnetic safety valve.
This always occurs when a fire ignites immediately after extinguishing a fire, that is, when the electromagnet of an electromagnetic safety valve has residual adsorption force, or when a valve is only equipped with a valve that can be opened and closed manually.

Therefore, in Japanese Patent Application No. 59-260083, the present applicant proposed that only when the operating lever member is pressed to the terminal position, that is, only when it is completely pressed down, and then when the pressing is released, it is locked at the intermediate position. proposed a device.

(Problem to be solved by the invention) However, this device includes a cam plate b on the operating lever member a and a cam plate c supported coaxially with the operating lever member a, and both cam plates b, c cam surface d provided on,
At the same time as locking the locking member f at e, when the pressing operation of the operation lever member a to the terminal position is released, the locking member f engages with the engaging portion g of the sub-cam plate d. Then, after the main cam plate b is returned to the intermediate position by the spring, the engaging portion h provided on the main cam plate b is configured to engage with the lock member f.

Therefore, when the operating lever member returns to the intermediate position, there is an inconvenience such as a contact sound between the engaging portion g and the locking member f.

(Means for Solving the Problems) The present invention provides a pressing operating device free from such inconveniences, and includes an operating lever member that can be pressed freely from a starting position A to a final position B against a return spring 1. 2
According to the return movement of the operating lever 2 by the spring 1, the cam plate 4 is disposed coaxially with the operating lever member 2 in the device equipped with the locking member 3 that locks the operating lever 2 at the intermediate position C. The cam plate 4 is provided with a first engaging portion 6 that engages with the interlocking plate 5 on the operating lever member 2, and the interlocking plate 5 is attached to the first engaging portion 6 on the operating lever member 2.
When operating from the starting end position to the ending position, the cam plate 4
The cam plate 4 is brought into pressure contact with the spring 7 as it moves along with the operating lever member 2, and when the pressing operation of the operating lever member 2 is released to the terminal position, the cam plate 4 engages with the locking member 3. a second engaging portion 8;
When the operating lever member 2 subsequently returns to the intermediate position, a third engaging portion 9 is provided which engages with the interlocking plate 5.

(Function) Thus, when the operating lever member 2 is pressed downward from the state shown in the third figure, the first engaging portion 6 of the cam plate 4 is brought into pressure contact with the front surface of the interlocking plate 5 by the spring 7, so that the operating lever member 2 is pressed downward from the state shown in the third figure. It moves together with the lever member 2, and when the operation lever member 2 moves to the terminal position, the second
The locking member 3 engages with the engaging portion 8 . Next, when the pressure on the operating lever member 2 is released, the operating lever member 2 is pushed in the return direction by the return spring 1 and moves in the returning direction by a small amount, but after the small movement, the operating lever member 2 has its interlocking plate 5. In order to engage with the third engaging portion 9, it is locked at an intermediate position.

The operation at this time generally only weakens the pressing force of the operating lever member 2, and therefore, when the interlocking plate 5 and the third engaging portion 9 are engaged, they are strongly repelled by a spring or the like, and both members hit each other. There is no occurrence of a loud sound such as the hitting of the locking member 3 against the cam plate 4 as in the previously proposed method.

Note that the operation lever member 2 is not pressed completely. In other words, when the cam plate 4 is not pushed all the way to the end position, the second engaging portion 8 provided on the cam plate 4 and the lock member 3 do not engage with each other.
Therefore, when the pressure on the operating lever member 2 is released, the operating lever member 2 is returned to the starting position by the return spring 1, and its operation is the same as that proposed earlier.

(Example) Embodiments of the present invention will be described with reference to the attached drawings.

In the drawings, reference numeral 2 denotes an operating lever member 3 which can be pressed and operated from a starting end position A to an end position B against a return spring 1;
4 indicates a locking member that locks the operating lever member 2 in its intermediate position C according to its return operation by the spring 1; 4 indicates a cam plate coaxially supported with the operating lever member 2; The cam plate 4 has a first engaging portion 6 that engages with the front end of the interlocking plate 5 on the operating lever member 2.
According to the release of the pressing operation of the operating lever member 2 to the terminal position, the second engaging portion 8 engages with the locking member 3, and the subsequent return of the operating lever member 2 to the intermediate position causes the interlocking. It has a third engaging part 9 that engages with the plate 5, and the first engaging part 6 is urged by a spring 7 in a direction in which it comes into pressure contact with the interlocking plate 5 in the front and rear directions.

To explain this in detail, the operation lever member 2 is
An interlocking plate 5 is integrally provided on the root side, and the interlocking plate 5 swingably supports a shaft 11 provided on the machine frame 12, and a cam plate 4 is supported on the shaft 11. A second engaging part 8 with which the locking member 3 engages is provided at the rear end of the cam surface 4a on the upper part of the cam plate 4, and a third engaging part 8 is provided at the front end of the cam plate 4 and the rear end of the first engaging part 6. A bent portion 3b at the tip of the lever 3a has one end of the locking member 3 pivotally supported on the machine frame 12 so as to be swingable. is applied to this, and the bent portion 3b is pressed onto the cam surface 4a by the spring 13,
When the cam plate 4 is moved to the terminal position of the operating lever member 2 described above, it is disengaged from the cam surface 4a and the lock member 3 is engaged with the second engaging portion 8.

What is shown in the figure is a valve housing 16 equipped with a sliding rod 15 at the rear of the operating lever member 2 that faces the operating lever member 2 via an auxiliary lever 14, an ignition switch 17 in front of the valve housing 16, and an electromagnetic safety valve 18 (described later) forcibly held. A switch 19 that intervenes in the circuit is provided, and these are operated by the operating lever member 2. To explain this, inside the valve housing 16 there is a first gas valve 20 which is kept closed by a spring and opened by being pushed by the sliding rod 15, and a second gas valve behind the first gas valve 20. It is equipped with an electromagnetic safety valve 18 as a valve, and when the operation lever member 2 is pressed downward from the state shown in FIG. Upper first gas valve 20
When the lever member 2 opens, the switch 19 also closes the lever member 2.
The upper protrusion 2b closes to keep the forced hold circuit in operation.

Next, at the end position B, that is, the push-off position, the switch 17 is pushed by the protrusion 2a on the operating lever member 2 to close the gas burner as shown in the fourth figure, and the gas burner is ignited. The electromagnetic safety valve 18 is held open by the discharge current of a capacitor (not shown) interposed in the forced hold circuit and the electromotive force of a thermocouple (not shown) facing the burner, and at the same time, the operating lever member 2 is opened as shown in the fifth figure. Thus, the burner is locked at the intermediate position C by the locking member 3, and the burner continues to burn.
In this embodiment, the valve closing spring 1 is used as the return spring 1.

In the drawings, reference numeral 10 indicates a release operation lever member that releases the lock at an intermediate position of the operation lever member 2 supported on the shaft 11, and the release operation lever member 10
, a protruding piece 1 protruding from the lower surface of the locking member 3.
0a, and when the release operation lever member 10 is pressed, the lock member 3 is pushed up, the engagement with the second engagement portion 8 of the cam plate 4 is released, and the first operation lever member is released. 2 returns to the state shown in FIG.

(Effect of the invention) According to the invention, the cam plate is coaxially supported with the operating lever member, and the lock is engaged with the cam plate and the interlocking plate on the operating lever member. The first operating lever member is pressed against the cam plate by a spring in the direction in which the cam plate moves along with the operating lever member when the operating lever member is operated from the starting end position to the final end position. When the pressing operation is released to the terminal position, the second engaging portion engages with the locking member, and when the operation lever subsequently returns to the intermediate position, the third engaging portion engages with the interlocking plate. Since a joint is provided, there is no contact noise between the lock member and the cam plate.
This has the effect of improving operability.

[Brief explanation of the drawing]

Fig. 1 is a slope view of a gas stove to which the present device is applied, Fig. 2 is a plan view of its main parts, Fig. 3 is a cutaway side view thereof, Figs. 4 and 5 are diagrams of its operating state, and Fig. FIG. 6 shows a cutaway side view of the conventional example. 1...Return spring, 2...Operation lever member, 3...
Lock member, 4... cam plate, 5... interlocking plate, 6...
...first engagement part, 7...spring, 9...second engagement part,
10...Third engagement part.

Claims (1)

[Scope of utility model registration request] An operating lever that can be pressed and operated from a starting end position to an end position against a return spring, and a locking member that locks the operating lever member in an intermediate position according to the return movement of the operating lever member due to the spring. , a cam plate is coaxially supported with the operating lever member, a first engaging portion is provided on the cam plate to engage with an interlocking plate on the operating lever member, and the interlocking plate is operated on the first engaging portion. When the lever member is operated from the start end position to the end position, the cam plate is brought into pressure contact with the spring so as to move along with the operation lever member, and the cam plate is pressed to the end position of the first operation lever member. When the operating lever member is released, a second engaging portion engages with the locking member, and when the operation lever member subsequently returns to the intermediate position, a third engaging portion is provided, which engages with the interlocking plate. A press operation device consisting of: