JPS60232427A - Pressing operation device - Google Patents

Abstract

PURPOSE:To perform position defining more positively at a disengaging position by providing a stopper for preventing the floating of an engaging member in such a positional relationship that the stopper opposes the engaging member only when the engaging member is positional at an oscillating angular position engaged with a groove position corresponding to the disengaging position of an operating rod. CONSTITUTION:In a pressing device mainly used at an ignition operating device of a gas instrument, a stopper 18 is at a position out of an oscillating angular range when an engaging member 15 moves from a groove position (a) to a groove position (c) through a groove position (b). The engaging member 15 can positively ride over a part havng a groove depth of 1.6mm. in front of the groove position (b) and a part having a groove depth 2mm. in front of the groove position (c) without being defined by the stopper 18. Thus, it is possible to prevent the inserting end 15a of the engaging member 15 from floating up at a position which is shallower than the depth of 3mm. at a groove position (d). Accordingly, even if an operating rod 7 is pressed by a pressing force which is stronger than an intermediate position C, the engaging member 15 is not separated from the cam groove 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press operation device mainly used in an ignition operation device for gas appliances.

The applicant of this application previously filed a patent application for this type of ignition operating device in 1973.
According to No. 8-209935, an operating lever is provided on a fixed frame so that it can be pressed freely against a return spring, and the return movement of the operating lever from the pushing end position is stopped at an intermediate position, and the engagement at the intermediate position is stopped. Using a push operation device with a push-button mechanism that returns the operating rod to the starting position by releasing the lock by pressing the stop from the intermediate position to the unlocking position before the terminal position, the operating rod can be moved. The suppressing operation to the terminal position activates the igniter, electromagnetic safety valve, and other ignition operated members to ignite the burner, and the return to the intermediate position stops the ignition operation and causes the burner to burn steadily, and then returns to the intermediate position. When pressing the button again from rc, the operating rod is returned from the unlocked position before the final position to the starting position to extinguish the nozzle without activating the operated member for ignition again. I suggested something like this.

Here, a button-shu-butshu machine is introduced, and the conventional one includes a guide member in which a cam groove is formed on one side of a fixed frame and an operating rod, and a swingable engager that is elastically inserted into the cam groove on the other side. For example, Special Publication No. 1767-1767 and Utility Model Publication No. 43
It is constructed by applying the heart cam mechanism known from Publication No. 12334, that is, the cam groove is moved from the groove position corresponding to the starting end position of the operating rod to the terminal position, intermediate position, and unlocking position. The retainer is formed in a deformed heart shape that returns to the groove corresponding to the starting end position via each corresponding groove position, and the retainer is moved toward the cam by relative movement between the guide member and the engager as the operating rod is operated. It moved within the groove to guide the movement of the operating rod as described above.

In this case, at the terminal position, the operated member is pushed all the way to restrict the position of the operating rod against the suppressing operation, but at the unlocked position, such regulating force does not work, and when pressed strongly, it corresponds to the unlocked position. The retainer may float up and come off the cam groove due to being pushed by the groove wall at the groove position.
According to No. 27828, a stopper is provided on the opposite side of the inserting direction of the engager to abut against the retainer and prevent the insertion end of the engager from floating above the plate surface of the guide member, and the cam of the engager is We proposed something that would prevent it from falling out of the groove.

However, in this device, the stopper is generally provided so as to face the engager over substantially the entire range of the swing angle of the retainer, and according to this, the retainer is rotated as described in detail later. It is necessary to set the arrangement height of the stopper so that the retainer does not come into contact with the stopper even when it follows the change in the groove depth of the cam groove and rides on the shallowest groove part, The floating of the engager at the groove position corresponding to the unlocked position cannot be restricted to a position deeper than the groove depth of this shallowest groove portion, and the engagement between the retainer and the groove wall at the groove position is This results in a disadvantage that the amount of engagement is small and the insertion end of the engaging element may bend and come off the cam groove.

The purpose of the misfiring FiA is to provide an improvement on the previous proposal that eliminates such inconveniences, and on the opposite side of the insertion direction of the retainer, the engager is engaged in the groove position corresponding to the unlocked position. The present invention is characterized in that a stopper is provided to suppress the floating of the retainer as much as possible in a positional relationship such that it faces the retainer only when it is in the oscillation angle position where the retainer is aligned.

Next, the present invention will be explained with reference to the illustrated embodiments.

The illustrated embodiment is one in which the device of the present invention is applied as an ignition operating device for gas appliances.
), a shutoff valve (3), and a gas governor (4) are assembled in series.
) and the safety valve (2) are arranged coaxially before and after each other,
The rear end of the valve rod (5) of the shutoff valve (3) faces the safety valve (2), and a fixed frame (6) is attached to the front end of the unit (υ). An operating lever (7) facing the front end of the valve lever +51 is inserted so as to be slidable in the front-rear direction, and a front panel (8) of the gas appliance is inserted at the front end of the operating lever (7).
) is brought into elastic contact with the spring (9a) rc, and the position of the operating rod (7) is regulated by the push button (9) coming into contact with the front panel (8). For example, as shown in FIG.
)K, and in order to make it freely pressable, a push-button mechanism Ql, which will be described later, is attached to the operating lever (7), and the return operation of the operating lever (71) from the end position B to the start end position A side is controlled from the start end position to the start end position. -A to an intermediate position NO of about 5.5 InIn, and by pressing again from the intermediate position 0, move it from, for example, an intermediate position flto to 1.
If it is pushed to the unlocked position of about 5mm, it will be at the intermediate position R.
The lock at e is released and the operating rod (7) is returned to the starting position &A.

According to the pressing operation of the operating rod (71) from the starting position filA to the final position B, the operating rod (7) first comes into contact with the valve rod (5) at point A in FIG. 7, and the shutoff valve ( 3) begins to open, and then the valve lever f51 crosses the intermediate position 0.
The electromagnetic safety valve (2) begins to be opened by pressure through e, and furthermore, at a point near the end position B, the ignition switch aυ provided on the fixed frame (6) is pressed against the cam protrusion a2 on the operating rod (7). When the operating lever (7) returns to the intermediate position C, the ignition switch C11l is opened and the safety valve (
The pressure in step 2) was released, allowing steady combustion to be applied to the burner.

In this case, the safety valve (2) is attracted and held in an open state by an output from a flame detection element such as a thermocouple facing the burner.

When extinguishing a fire, the operating rod (7) is operated to suppress it again from the intermediate position 0 to return it to the starting position A, and the shutoff valve (3) is closed to cut off the gas supply to the burner. In this case, the operating rod (7) is returned to the starting end position A from the unlocked position before the end position BVC without being pushed again, and the electromagnetic safety valve (2) and ignition switch, which should be operated only when ignition, are activated. No unnecessary operation of the operated member for ignition consisting of aυ is performed.
As shown in the figure, a guide member ■ having a cam groove α3 formed on one side of the fixed frame (6) and the operating rod (7), and a retainer θ9 elastically inserted into the cam groove α3 on the other side. In the illustrated example, the guide member fi41t is fixed to the operating rod (7), and the retainer OS is composed of a F-shaped rod, which is attached to the fixed frame ( The plate is pivoted to the guide member I side (1 (9) so that it can swing freely, and its tip is inserted into the cam groove 0
3, and the insertion end (15-) at the lower end of the tip was made to come into elastic contact with the bottom surface of the cam groove a3.

As shown in FIG. 3, the cam groove a3 extends from a groove position a corresponding to the starting end position A to groove positions b1c and d corresponding to the terminal position MB, intermediate position 0, and unlocking position. It is formed in a deformed heart shape and returns to the groove position a.
) is operated in the order of starting end position A to terminal end position B intermediate position 0 unlocking position to return to starting end position A. When the engager (+51) moves relative to the guide member (14+), the neck vibrates while Inside cam groove 0 from groove position a to groove position b1
Move in the order of groove position c1 groove position d and return to groove position 1LVC, and engager 0 to the groove wall (15a) at groove position C.
The return force of the operating lever (7) by the return spring (7a) is received by the contact of the operating lever (7), so that the operating lever (7) is locked at the intermediate position 0. The cam groove Q is provided with a step in front of each groove position to prevent the retainer (15) from moving backwards, as shown in the fourth figure. For example, the groove depth on the plate surface (14a) of the guide member (141) at groove position d is 4 mm.If five grooves are located, the groove depth at groove position C is 3 mm.The groove depth at the top of the step in front of the groove position C is 3 mm. ”
mms Groove Level The groove depth at the top of the step in front of C is 2mm1.
The groove depth at the top of the step in front of groove position a was set to k 5 mm.

Here, the operating rod (7) is regulated in position at the terminal position B by pushing the electromagnetic safety valve (2), which is the operated member, when the operation is suppressed from the starting position A, and no excessive force is applied to the engaging element (15+). However, when a suppressing operation is performed from intermediate position C, the locking release position is set before the terminal position B, so the position cannot be controlled by the operated member, and when a strong pressing operation is performed, the retainer (151 becomes engaged). It is pushed by the groove wall (15b) at the groove position d corresponding to the stop release position DIC and tries to rise from the cam groove α.

The cam groove 03 of the retainer 051 due to this floating
In order to prevent the withdrawal from i, the above-mentioned patent application
In No. 7828, the attachment plate αη of the plate spring (16) that urges the engagement element 0 (g) is used as a stopper, and the engagement element a9 is brought into contact with the attachment plate (17), thereby The insertion end (15a) can be prevented from floating above the plate surface (14a) of the guide member 0, but in this case, the attachment plate aη is attached to the fixed frame (6) by is fixed in a posture that crosses the retainer a9, and faces the engager αω over the entire range of the swing angle of the retainer a9;
By pressing the operating rod (7) from the starting position mA to the terminal position kn, the engaging element a! 19 can move over the shallowest groove part of the groove position [a to groove position bVC cam groove 03), that is, the 1.6 mm groove depth part at the top of the step in front of the groove position. Attach the mounting plate Q7) to the shallowest groove portion of the engagement element 05.
Even when the retainer 1 rides on the retainer (151), the insertion end (15a) of the retainer (151) has to be distributed at a height where it does not come into contact with the retainer 1. Even if it floats up from a depth of 1.6 mm to a depth of 1.6 mm, this cannot be controlled, and when the operating rod (7) is pushed harder from the intermediate position 0, the tip of the retainer 09 bends and the cam' You may leave e4031.

On the other hand, according to the present invention, on the opposite side of the insertion direction of the engaging element 09, the engaging element (15) is at the swing angle position where it engages with the groove position d corresponding to the unlocking position. In the above embodiment, a stopper a& is provided on the mounting plate 07 in the above embodiment, so as to prevent the engagement element (151 from floating up) as much as possible so as to face the engagement element 151 only when the engagement element 151 is present. ,
As clearly shown in FIGS. 5 and 6, a cut-and-raised tongue piece extending downward in this positional relationship is provided so as to protrude from the stopper (1).
81'em.

Here, suppressing the floating of the engaging element Q51 as much as possible means suppressing the floating to a minimum within a range that does not inhibit the movement of the engaging element α9 along the cam W (131), and the above-mentioned In the case of the embodiment, when moving the engaging element a from the groove position d to the part fi7.a, the engaging element Q51 swings sideways once according to the groove shape bent in a substantially dogleg shape connecting the two parts fiids at. After the movement, the insertion end (1
5a) The VC stopper is configured to suppress floating to a position f shallower than 3 mm.

The stopper mark a is located at a position that is out of the swing angle range when the retainer a9 moves from the groove position a to the groove position b2 to the part lie, so the retainer 09 is located in front of the groove position. 1.6M groove depth part and 2 in front of part @C
mm groove depth can be reliably overcome without being restricted by the stopper α mark, and according to this, the retainer a9 can be moved at the groove position d without obstructing the movement of the retainer a9. (If the insertion end (15a) of 151 is shallower than the depth of 3 points, ftI: K can be prevented from floating, and this is 1
．． Compared to the one that floats to a depth of 6 mm, the ballast (15
The bending moment acting on the tip of the cam groove (
You will no longer be able to leave 131.

In the above embodiment, the stopper (181f: mounting plate ar+
However, as shown in FIG. 8, the stopper 08
) can be constructed from a separate plate piece and attached to the fixed frame +61 VC, or a stopper 08 can be attached to the guide member H so as to cover the groove position d, as shown in Fig. 9. It's okay.

According to the embodiment shown in FIG. 9, the stopper 08 faces the engager (151 only when the engager 19 is engaged at the groove position d), so the stopper 08 faces the engager (151). It is also possible to configure the stopper [18] so that the engager a9 does not float at all at the groove position d without considering the movement over the 3 mm groove depth portion to the groove position d.

As described above, according to the present invention, the stopper that prevents the retainer from floating is placed in the swing angle position where the engager is engaged with the groove position corresponding to the unlocking position of the operating rod. It is provided in a positional relationship that opposes the engaging element, and allows the engaging element to float at the groove position without hindering the movement of the engaging element to get over the shallow groove part at positions other than the angular position. The engagement element can be regulated to a position deeper than the groove depth of the cam groove, and even if the operating rod is pressed strongly from the intermediate position to the unlocked position, the engaging element will not come out of the cam groove, making the position regulation at the unlocked position more reliable. have an effect.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of an example of an ignition operating device to which the device of the present invention is applied, Fig. 2 is a perspective view of the main parts thereof, Fig. 3 is a plan view of the guide member, and Fig. 4 is the development of the cam groove. 5 is a plan view of the main parts when the operating rod is operated to the unlocked position, FIG. 6 is a cross-sectional side view taken along the line M-Vll in FIG. 5, and FIG. The diagrams to be described, FIGS. 8 and 9, are plan views of main parts corresponding to FIG. 5 of other embodiments, respectively. (6)...Fixed frame (7)...Operation rod (7a)...
・Return spring 0 [...butsubutsubutsu mechanism 03)・
...Cam groove αa...Guide member (19...Engager 0IlO...Stopper patent applicant Rinnai
2 people outside the corporation Figure 5 6 Figure 6

Claims (1)

[Claims] An operating rod is provided on the fixed frame so that it can be pressed freely against a return spring, and the returning operation of the operating rod from the pressing end position to the starting end position is locked at an intermediate position, and the locking at the intermediate position is stopped. A push operation device with a push-button mechanism that returns the operating rod to the starting end position by releasing the operating rod by a pressing operation from the intermediate position to the unlocking position before the terminal position, wherein the operating rod is connected to the fixed frame. One side of the operating rod returns from the groove position corresponding to the starting end position to the groove position corresponding to the starting end position via the groove positions corresponding to the terminal end position, the intermediate position, and the unlocking position. In the push-button mechanism that includes a guide member having a deformed heart-shaped cam groove and a swingable retainer that is elastically inserted into the cam groove, On the opposite side of the direction, the engaging element is floated in a positional relationship such that it faces the engaging element only when the engaging element is in a swing angle position where it engages with the groove position corresponding to the unlocking position. A press operation device characterized by being provided with a stopper that suppresses the pressure as much as possible.