JPH0325034Y2 - - Google Patents

Description

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

(Prior art) An operating rod is provided on a fixed frame so that it can be pressed and operated, and the return movement 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 performed by the operation. The push operation device is equipped with a push mechanism that is released by pressing the rod again, and the push mechanism has the starting end position, the ending position, the intermediate position, and the intermediate position provided on either the fixed frame or the operating rod. The guide member is composed of a loop-shaped cam groove having grooves corresponding to unlocking positions slightly closer to the terminal position than the guide member, and an engagement pin inserted into the cam groove provided on the other side, and the engagement pin is inserted into the cam groove provided on the other side. It is known that the pin has one end of a metal rod bent at a substantially right angle to serve as a support part, and the other end bent at a substantially right angle to serve as an insertion part into the cam groove.

In such a pressing operation device, at the terminal position, the operated member is pushed all the way to restrict the position of the operating rod against the pressing operation, but there is no such restriction at the unlocked position, which is slightly closer to the terminal position than the intermediate position. If the locking pin is pressed too hard, the locking pin may be forcibly pushed by the guide member and may be deformed or damaged, resulting in malfunction.

In order to prevent this, as shown in FIGS. 12 to 14, a deformed heart-shaped structure having grooves a to d corresponding to the start end position, the end position, the intermediate position, and the unlocking position slightly forward of the intermediate position is used. A support plate C is provided on the upper surface of the guide member B provided with the cam groove A, a long groove D along the sliding direction of the operating rod is provided on the support plate C,
The support part 1 of the engagement pinhole is inserted and supported in the long groove D, and the insertion part 2 is inserted into the cam groove 1 through the transparent window provided in the support plate C, and the operation rod When the guide member B moves in the direction of the arrow, the engagement pinhole is pushed by the guide member B by engagement with the groove edge of the cam groove A at its insertion end, and moves as shown in FIG. As shown in FIG. 2, there is also known a device in which the front end of the insertion portion hole 2 is supported in contact with the front edge of the transparent window to prevent the deformation or damage.

(Problem to be solved by the invention) However, this one
Since it is supported by the long groove 2, there is a problem that erroneous operation may occur due to the movement of the support portion 1 of the engaging pin hole.

In other words, when pressing the guide member B along with the operating rod, that is, when suddenly releasing the hand when the engagement pin hole reaches the end position of the cam groove A, the guide member B is moved to the intermediate position without being affected by the play. The engagement pinhole can be locked, but if the hand is gently released, the insertion part hole 2 of the engagement pinhole will be in the vicinity of the intermediate position as shown in FIG. 14 due to the movement allowed. It is inconvenient that after hitting the cam groove wall, the cam moves directly to the unlocking position and returns to the starting position without being locked at the intermediate position.

(Means for Solving the Problems) The present invention solves the above problems, and its means include providing a fixed frame with an operating rod that can be pressed freely from a starting end position to an end position, and The push operation device is equipped with a push push mechanism that locks the return operation from the end position to the start end position at an intermediate position, and releases the lock at the intermediate position by pressing the operation rod again, the push operation device comprising: The mechanism includes a cam groove provided on either one of the fixed frame side and the operating rod side and having respective groove portions corresponding to a starting end position, a final end position, an intermediate position, and an unlocking position slightly closer to the final end position than the intermediate position. and an engagement pin provided on the other side and inserted into the cam groove,
The engaging pin has one end of a metal rod bent at a substantially right angle to serve as a support part, and the other end bent at a substantially right angle to serve as an insertion part into the cam groove. The support section positions and supports either the fixed frame or the operating rod so that the insertion section side thereof can swing vertically and horizontally, and the engagement pin is positioned on the front and top surfaces of the insertion section side of the engagement pin. Each stopper is provided, with which the upper surface and front surface of the engagement pin come into contact when the engagement pin moves.

(effect) Next, the operation of the present invention will be explained.

When the operating rod 2 is pressed, the engagement pin 7 moves from the groove a corresponding to the starting position A to the terminal position B along the cam groove 5 due to the relative movement between the guide member 6 and the engaging pin 7. It moves to the groove part b corresponding to . When the pressing operation of the operating rod 2 is released in this position, the engaging pin 7 follows the cam groove 5 and is locked in the groove C. When the operating rod 2 is pushed again, the engagement pin 7 moves along the cam groove 5 to the groove d corresponding to the unlocking position D. When the pressing operation of the operating rod 2 is released at this position, the engagement pin 7 returns to the groove portion a corresponding to the starting end position A according to the cam groove 5.

Therefore, the operating rod 2 is kept in a pressed state in which it is locked at an intermediate position by the first pressing device, and is released by the second pressing operation. Up until now, there has been no particular difference from conventional press operation devices.

The present invention particularly relates to the engaging pin 7.
is positioned and supported by the support portion 7a on either the fixed frame 1 or the operating rod 2 so that the insertion portion 7b side can swing vertically and horizontally, and the upper surface of the engagement pin 7 on the insertion portion 7b side At least stoppers 8 and 9 are provided on the front surface of the engaging pin 7, which come into contact with the engaging pin 7 when the engaging pin 7 moves upward. Even if the engaging pin 7 is pushed upward by the cam groove 5, the stopper 8 prevents it from moving upward beyond a certain level, so that the engaging pin 7 does not come off from the cam groove 5. can be supported by the stopper 9, thereby preventing the insertion portion 7b of the engagement pin 7 from being pushed forward and deformed or damaged.

Moreover, since the front end of the engaging pin 7 is brought into contact with the stopper 9 by utilizing the upward movement of the engaging pin 7, there is no space between the supporting portion 7a of the engaging pin 7 and the operating rod 2 or the fixed frame 1. It is no longer necessary to provide a movement gap for bringing the front end surface of the engagement pin 7 into contact with the stopper as in the conventional example, and malfunctions caused by this can be eliminated.

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

In the drawing, 1 is a fixed frame, 2 is an operating rod provided on the fixed frame 1 so that it can be pressed from a starting position A to a terminal position B and returned to the starting position A by a spring 3, as shown in FIG. A push mechanism interposed between the operating rod 2 and the fixed frame 1 is shown, and the push mechanism 4 locks the operating rod 2 in its return operation from its terminal position B to its starting position A at an intermediate position. The locking at position C is released by pressing the operating rod 2 again, and the starting end position A is returned.

As shown in FIGS. 3 to 5, this push mechanism 4 has grooves provided in the fixed frame 1, which correspond to the start end position A, the end position B, and the unlocking position D slightly forward of the intermediate position C. It consists of a guide member 6 equipped with a modified heart-shaped cam groove 5 having a, b, c, and d, and an engaging pin 7 that engages with the cam groove 5 provided on the operating rod 2. , one end of the metal rod is bent at a substantially right angle to support the other end 7a.
At the same time, the other end is bent at a substantially right angle to provide an insertion portion 7b into the cam groove 5.

The conventional mechanism is not particularly different from conventionally known press operation devices.

In the embodiment of the present invention, the engaging pin 7 is fitted and supported by its supporting portion 7a into the supporting hole 1a provided on the fixed frame 1 side, and the insertion portion 7 at the other end
A stopper 8 is provided which is vertically and swingably movable on the b side, and is located at the upper and front side of the insertion portion 7b of the engaging pin 7, and the upper surface and the front surface of which come into contact when the engaging pin 7 moves upward. . The support hole 1a is provided on one side, and the support portion 7a of the engagement pin 7 is fitted and supported in the support hole 1a, and the horizontally elongated through hole 1 is provided on the other side of the support plate 1b.
The insertion portion 7b is inserted into and engaged with the cam groove 5 via c, and the front edge of the opening 1c of the support plate 1b is used as a stopper 9 on the front surface of the insertion portion 7b of the engagement pin 7, and is supported on the fixed frame. The insertion portion 7b of the engagement pin 7
A separate stopper 8 is provided facing the top surface.

In this case, if the front end of the support plate 1b is provided with a groove 1d that bends upward and the stopper 8 is assembled to this upper end, the groove 1d can be advantageously used as a positioning member for the stopper 8. It is. In this case, the support hole 1a is provided in the fixed frame 1.

The support plate 1b may be supported on the fixed frame 1 by the engagement pin 7 so as to be swingable only to the left and right along with the engagement pin 7, as shown in FIGS. 9 and 10. It is advantageous that the support plate 1b can be made small.

FIG. 11 shows still another embodiment, in which the support part 7a of the engagement pin 7 is provided in the insertion hole 1 in the fixed frame 1.
A parallel portion 10 substantially parallel to the upper surface of the guide member 6 is fitted onto the upper part of the insertion portion 7b so as to be able to swing vertically and horizontally, and supported by the fixed frame 1.
An L-shaped frame 10 having a vertical part 10b projecting downward from the front end thereof was provided, and the side surfaces of the parallel part 10a and the vertical part 10b of the L-shaped frame 10 were used as the stoppers 8 and 9.

In the drawings, reference numeral 11 denotes a leaf spring that controls contact of the engagement pin 7 with the cam groove 5, with one end supported by the stopper 8 and the other end facing the upper surface of the engagement pin 7.

What is shown in FIG. 1 is a device in which the device of the present invention is applied to an ignition device for gas appliances. To explain this, the ignition device 12 has an electromagnetic safety valve 14, a cutoff valve 15, and a gas governor 16 in a valve casing 13. The cutoff valve 15 and the safety valve 14 are arranged coaxially, the front end of the valve rod 17 of the cutoff valve 15 is opposed to the safety valve 14, and the ignition device 12 is fixed to the rear end of the ignition device 12. A frame 1 is assembled, and a valve rod 17 is pressed against a spring 18 by an operating rod 2 provided thereon.

Next, to explain this operation, according to the pressing operation of the operating rod 2 from the start end position A to the end position B, the operating rod 2 first hits the valve rod 17 at point α in FIG. The safety valve 14 begins to open by pressing through the valve rod 17 at a point β beyond the intermediate position C, and furthermore, at a point γ near the terminal position B, the ignition valve provided on the fixed frame 6 starts to open. The switch 19 is pushed by the cam protrusion 20 on the operating rod 2 to close it, igniting a burner (not shown), and when the operating rod 2 returns to the intermediate position C, the ignition switch 19 opens. At the same time, the pressure on the safety valve 14 is released, and the burner shifts to a steady combustion state.

The safety valve 14 is kept open by an output from a thermoelectric generating element such as a thermocouple facing the burner.

When the operating rod 2 is pressed again, the lock at the intermediate position C is released, and the valve rod 1
7 is released, and as a result, the shutoff valve 15 can be closed.

In the case where the ignition switch 19, cutoff valve 15, and safety valve 14 are operated within the limited operation range of the operating rod 2, even if there is a slight change in the amount of operation as in the conventional example, these switch 19, cutoff valve 15,
Although there is a possibility that the safety valve 14 may be operated erroneously, the push operation device of the present invention eliminates this problem because the amount of operation does not change.

In FIG. 1, reference numeral 22 indicates a push button provided at the rear end of the operating rod 2.

(Effect of the invention) As described above, according to the present invention, the engaging pin constituting the push mechanism can be attached to one of the fixing frame and the operating rod with its supporting part, and the insertion part side of the engaging pin can be placed vertically and horizontally. In addition to being supported in a swingable position, the engagement pin is provided with stoppers on the front and upper surface of the insertion portion side that come into contact when the engagement pin moves upward, so that the engagement pin can be positioned and supported as in the conventional example. It is possible to prevent movement of the operating rod in the operating direction between either the fixing frame or the operating rod and the supporting part of the engaging pin, thereby preventing erroneous operation due to movement of the supporting part of the engaging pin. It has the effect of eliminating it.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of one example of implementing the present invention;
3 is a front view of the guide member, FIG. 4 is an expanded cross-sectional view of the guide member, FIG. 5 is an enlarged cross-sectional view, FIG. 6 is a diagram of its operating state, and FIG.
8 is a plan view of the support plate, FIG. 9 is a cutaway side view of the main part of another embodiment, and FIG. 10 is a plan view of the support plate. FIG. 11 is a cutaway side view of the main part of another embodiment, FIG. 12 is a cutaway side view of the conventional example, and FIG. 13 is a plan view thereof.
FIG. 14 is a diagram showing its operating state. DESCRIPTION OF SYMBOLS 1... Fixed frame, 2... Operation rod, 3... Push operation device, 4... Push push mechanism, 5... Cam groove, 6... Guide member, 7... Engagement pin, 7a...
...support part, 7b...insertion part, 8, 9...stopper.

Claims (1)

[Scope of utility model registration request] A fixed frame is provided with an operating rod that can be pressed and operated from a starting end position to an end position, and the return movement of the operating rod from the ending position to the starting end position is stopped at an intermediate point,
The push operation device is equipped with a push mechanism that releases the locking at the intermediate position by pressing the operation rod again, and the push mechanism has a starting end provided on either the fixed frame side or the operation rod side. a guide member consisting of a cam groove having respective grooves corresponding to positions, a terminal position, an intermediate position, and an unlocking position slightly closer to the terminal position than the intermediate position; and an engaging pin provided on the other side and inserted into the cam groove. The engagement pin is formed by bending one end of a metal rod at a substantially right angle to serve as a support part, and bending the other end at a substantially right angle to serve as an insertion part into the cam groove. The engagement pin is positioned and supported by the support part on either the fixed frame or the operating rod so that the insertion part side thereof can swing vertically and left and right, and the engagement pin is positioned and supported on the front and upper surfaces of the insertion part side of the engagement pin. A push operation device comprising stoppers that abut the top and front surfaces of the engagement pin when the engagement pin moves upward.