JPH033243B2 - - Google Patents

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 has previously proposed an ignition operating device of this kind, in which an operating rod is provided in a fixed frame so that it can be pressed freely from a starting end position to an end position against a spring, and the returning operation of the operating rod from the end position is intermediate. A push operation with a push-button mechanism that locks the operating rod at the intermediate position and releases the lock at the intermediate position by pressing the lever from the intermediate position to the unlocking position to return the operating rod to the starting position. Using a device, by pressing the operating rod to the end position, the ignition operated member such as the igniter or electromagnetic safety valve is actuated to ignite the burner,
We have proposed a system in which the ignition operation is stopped upon returning to the intermediate position, causing the burner to burn steadily, and the burner is extinguished by returning to the starting position by pressing again from the intermediate position.

Here, the push push mechanism is conventionally constructed by providing a guide member having a cam groove formed on one side of the fixed frame and the operating rod, and an engaging element elastically inserted into the cam groove on the other side. It is constructed by applying the heart cam groove known from Publication No. 1767 and Japanese Utility Model Publication No. 12334/1983, that is, the cam groove is
The operation rod is formed in a heart shape from the groove position corresponding to the starting end position of the operating rod to the terminal position, the intermediate position, and the unlocking position, and returns to the groove corresponding to the starting end position via the corresponding groove positions. Due to the relative movement between the guide member and the engaging element during the operation, the engaging element moves within the cam groove, thereby guiding the movement of the operating rod as described above.

In this case, a push operation device with a push push mechanism that is easy to operate is desired.

An object of the present invention is to provide a device that meets such demands, and in the push operation device with a push push mechanism according to the above-mentioned proposal, the cam groove is located in front of each groove position. A step is formed to prevent the engaging element from moving backward, and the return spring connects a groove position corresponding to the terminal position to which the engaging element moves during the return operation of the operating rod and a groove position corresponding to the intermediate position. The difference in height between the deepest part and the shallowest part of the groove and the groove that connects the groove position corresponding to the unlocked position and the groove position corresponding to the start end position of the operating rod that resists the return spring. The height difference is smaller than the height difference between the deepest part and the shallowest part of the groove connecting the groove position corresponding to the starting end position and the groove position corresponding to the terminal end position, to which the engaging element moves during the pressing operation to the terminal end position. .

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

The illustrated embodiment is an application of the device of the present invention as an ignition operating device for gas appliances. In FIG. The shutoff valve 3 and the safety valve 2 are arranged coaxially in front and behind each other, and the rear end of the valve rod 5 of the shutoff valve 3 is connected to the safety valve 2.
Further, a fixed frame 6 is attached to the front end of the unit 1, and an operating rod 7 opposite to the front end of the valve rod 5 is inserted into the fixed frame 6 so as to be slidable in the front and rear direction. A push button 9 attached to the front panel 8 of the gas appliance is brought into elastic contact with the front end of the operating rod 7 by a spring 9a, and the position of the operating rod 7 is regulated by the contact of the push button 9 with the front panel 8. As shown in FIG. 6, the push button 9 can be freely pushed from the starting end position A shown by the solid line to the rear end position B by about 10 mm against a return spring 7a, as shown in FIG. 10, the return operation of the operating rod 7 from the end position B to the start end position A side is stopped at an intermediate position C about 5.5 mm from the start end position A, and by pressing again from the intermediate position C. This is done from, for example, intermediate position C before terminal position B.
When pushed to the unlocking position D of about 1.5 mm, the locking at the intermediate position C is released and the operating rod 7 is returned to the starting position A.

According to the pressing operation of the operating rod 7 from the starting end position A to the ending position B, the operating rod 7 first comes into contact with the valve rod 5 at point A in FIG. 6, and the shutoff valve 3 begins to open. , and then the valve rod 5 at point B beyond intermediate position C.
The electromagnetic safety valve 2 begins to be opened by being pushed through the terminal position B, and the ignition switch 11 provided on the fixed frame 6 is closed by the cam protrusion 12 on the operating rod 7 being pushed at point C near the end position B. When the operating rod 7 is returned to the intermediate position C, the ignition switch 11 is opened and the pressure on the safety valve 2 is released, causing the burner to undergo steady combustion. I made it possible to be given. In this case, the safety valve 2 is suctioned and held in an open state by an output from a fire detection element such as a thermocouple facing the burner.

When extinguishing a fire, the operating rod 7 is pressed again from the intermediate position C 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 D before it without being pushed again to the end position B, and the ignition switch consisting of the electromagnetic safety valve 2 and the ignition switch 11, which must be operated only at the time of ignition. This prevents unnecessary operation of the operated member.

As shown in FIGS. 2 to 5, the push mechanism 10 includes a guide member 14 having a cam groove 13 formed on one side of the fixed frame 6 and the operating rod 7, and a guide member 14 formed with a cam groove 13 on the other side. In the illustrated example, the guide member 14 is fixed to the operating rod 7, and the engager 15 is inserted into the guide member 14.
5 is composed of a U-shaped rod, and its tail end is connected to the fixed frame 6.
The tip of the guide member 14 was inserted into the cam groove 13 with the guide member 14 pivoted by a leaf spring 16.

The cam groove 13 moves from groove position a corresponding to the starting end position A to groove positions b, c, and d corresponding to the terminal position B, intermediate position C, and unlocking position D, respectively, to the groove position a. When returning to the starting position A by operating the operating rod 7 in the order of the starting end position A, the final end position B, the intermediate position, and the unlocking position D, the engaging member 15 moves relative to the guide member 14. This moves in the cam groove 13 in the order of groove position a, groove position b, groove position c, and groove position d, and returns to groove position a, so that the engager 15 comes into contact with the groove wall 13a at groove position c. The return force of the operating rod 7 by the return spring 7a is received by the contact, and the operating rod 7 returns to the intermediate position C.
It is now locked to.

A, B, C, and D indicate steps that prevent retrograde movement.

The groove depth from the plate surface 14a of the guide member 14 from groove position a to groove position d is, for example, 4 mm, that of intermediate groove positions b and groove position c is 3 mm, and a height of 1 mm is provided in front of each groove position. The steps A, B, C, and D were formed, but according to this, the operating rod 7 by the return spring 7a
a groove connecting groove position b and groove position c, through which the engager 15 moves during the return operation, and groove position d and groove position a.
The height difference between the deepest part and the shallowest part of the groove connecting the two is 1 mm, and the engagement element 1 is set by the return spring 7a.
The influence of sliding resistance during the return operation of the operating rod 7 in No. 5 has been reduced.

On the other hand, the groove extending from the groove position a to the groove position b is a part where the engaging element 15 is moved when the operating rod 7 is pressed, and there is no problem even if the height difference is relatively large, 2 mm.

Here, when the operating rod 7 is pressed from the starting end position A, the position is regulated at the end position B by pushing the electromagnetic safety valve 2, which is the operated member, so that no unreasonable force is applied to the engaging element 15. When pressing from the intermediate position c, the locking release position D is set before the terminal position B, so the position cannot be controlled by the operated member, and when the pressing operation is performed strongly, the engager 1
5 is the groove wall 1 at the groove position d corresponding to the unlocked position D
3b and tries to rise from the cam groove 13.

Therefore, what is shown in the figure is a stopper provided on the opposite side of the insertion direction of the engaging element 15, which contacts the engaging element 15 and prevents the insertion end 15a of the engaging element 15 from floating above the plate surface 14a of the guide member 14. 17,
The engaging element 15 is prevented from being disengaged from the cam groove 13, and even if the operating rod 7 is strongly pressed from the intermediate position c, the engaging element 15 does not come off the groove wall 13b at the groove position d, and the operating rod 7 is The position is regulated at the unlocked position D.

In the illustrated example, the stopper 17 is also used as a mounting plate for a leaf spring 16 that urges the engaging element 15 in the insertion direction, and the engaging element 15 is fitted with a groove having a groove depth of about 3 mm as shown in FIG. It is attached to the fixed frame 6 so as to be supported substantially horizontally at the groove position d, and at a groove depth of 4 mm, it is tilted downward to suppress floating due to contact with the groove wall 13b. I made it.

In addition, making the height difference of the groove connecting groove position d and groove position a smaller than the height difference of the groove connecting groove position a and groove position b means that the distance from groove position d to groove position a and the height difference between groove position b Although it is advantageous even in the case of a normal heart cam where the distances from groove position d to groove position a are approximately equal, in the case of a deformed heart cam as shown in the figure in which the distance from groove position d to groove position a is shorter than the distance from groove position a to groove position b, It is even more advantageous.

Although the embodiment in which the present invention is applied to an ignition operating device for gas appliances has been described above, it is needless to say that the present invention is not limited to this.

As described above, according to the present invention, the difference in height between the deepest part and the shallowest part of the groove of the cam groove, where the engager moves when the operating rod returns, is adjusted so that the engager moves when the operating rod is pressed to the terminal position. Since the difference in height between the deepest part and the shallowest part of the cam groove is made smaller than the difference in height between the deepest part and the shallowest part of the groove part of the cam groove, the influence of the sliding resistance of the engaging element on the return operation of the operating rod can be reduced, and the operability can be improved.

[Brief explanation of drawings]

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, and FIG. 2 is a perspective view of the main parts thereof.
Fig. 3 is a front view of the guide member, Fig. 4 is an expanded cross-sectional view of the cam groove, Fig. 5 is a cut-away side view of the main parts explaining the arrangement of the engager and the stopper, and Fig. 6 is a cross-sectional view of the operating rod. It is a line diagram explaining operation. 6...Fixed frame, 7...Operation rod, 7a...Return spring, 1
0...Push push mechanism, 13...Cam groove, 14
...Guide member, 15...Engager.

Claims (1)

[Claims] 1. An operating rod is provided on the fixed frame so that it can be pushed freely from the starting end position to the ending position against a return spring, and the return movement of the operating rod from the ending position to the starting end position is stopped at an intermediate position, and the intermediate A push operation device with a push-pull mechanism that returns the operating rod to the starting position by releasing the lock at the intermediate position by pressing the lever from the intermediate position to the unlocking position,
one of the fixed frame and the operating rod, from a groove position corresponding to the starting end position to the end position, the intermediate position, and the unlocking position, each corresponding to the starting end position through groove positions corresponding to each of the positions; In the push mechanism that includes a guide member having a cam groove that returns to the groove position and an engager that is elastically inserted into the cam groove on the other side, A groove position corresponding to the terminal position and a groove position corresponding to the intermediate position, to which the engaging element moves when the operating rod is returned by the return spring, is shaped with a step on the front side to prevent the engaging element from moving backward. and the height difference between the deepest and shallowest parts of the groove connecting the groove position corresponding to the lock release position and the groove position corresponding to the start end position, respectively, The height difference is made smaller than the height difference between the deepest part and the shallowest part of the groove connecting the groove position corresponding to the starting end position and the groove position corresponding to the final end position, where the engaging element moves when the operating rod is pressed to the terminal position. Features a press operation device.