JPH0636446Y2 - Push button device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a push button device for a heat device such as an instant water heater and other devices.

(Prior Art) Conventionally, it is known that an operation push button is provided on the front surface of the instrument body and the operated member in the instrument body is pressed by the operation push button. A push button for operation is directly provided on the operated member provided and the push button a is moved forward and backward, and a push button a is supported on the instrument body b at its upper end as shown in FIG. is there.

(Problems to be solved by the invention) However, in the former case, although the push button does not tilt, a relatively large pressing force is required to directly press the operated member, and in the latter case, such a problem is solved. As the push button a is pushed in, the posture of the push button a changes, so that the front surface thereof tilts. For this reason, there is a problem that the finger becomes slippery and the operation becomes difficult.

An object of the present invention is to obtain a push button device that eliminates such a problem.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides an operation push button on the front surface of an instrument body, and presses an operated member in the instrument body with the operation push button. In operation, the various end portions of the two link pieces, one end of which is axially supported by the instrument body,
A parallel link mechanism is constituted by the instrument main body, both link pieces, and the bar by pivotally supporting a bar projecting from the operation push button in the pushing direction, and one of the two link pieces has one of the link pieces. The operated member is pushed in the middle.

(Operation) According to the push button device configured as described above, when the operation push button is pushed, the operation push button moves by the parallel link mechanism, so that the operation push button is pushed without changing its posture. . Moreover, since the operated member is pushed in the middle of one of the two link pieces, the one link piece functions as a lever, and the force required to push the operation push button can be reduced. .

(Example) An example of the present invention applied to an instantaneous water heater will be described.

In the drawing, reference numeral 1 denotes an appliance main body, which is provided with a heat exchanger 2, a burner 3 for heating the same, and a control unit 4, and the control unit 4 has a water passage 5 connected to the heat exchanger 2. The water valve 6 facing the gas valve 7 and the gas valve 8 facing the gas passage 7 connected to the burner 3 are provided. The water valve 6 and the gas valve 8 are controlled to open and close by a push button 9 for operation.

Explaining this, between the water valve 6 and the gas valve 8 and the operating push button 9, an operating rod 11 is provided in the instrument body 1 as an operated member provided with a push-push mechanism 10 and the water is further supplied. A push rod 13 having a ratchet 14 is provided on the valve 6 side,
According to the first push operation of the operation push button 9, the contact piece is
When pushed by 11a, the pushing rod 13 moves backward against the return spring 15, and the ratchet 14 on the pushing rod 13 pushes the pushing lever 16 behind it.
When the push rod 13 is engaged with the tip of the push rod 9 and the push rod 13 is returned by the spring 15 in response to the release of the subsequent push operation, the ratchet 14 pulls the push rod 13 of FIG. As indicated by the chain line, the lever 16 tilts counterclockwise and the water valve 6 behind the lever 16 is opened, and the push-push mechanism 10 of the operating rod 11 is operated.
The water valve 6 is kept open by being held at the locking position by.

Then, when the second push operation of the operation push button 9 is continued, the push rod 13 moves back a little and then returns to the initial position. By tilting clockwise, the engagement with the pressing lever 16 is released and the water valve 6 is closed.

Further, as clearly shown in FIG. 2, the other side of the connecting piece 11a is also provided with a pushing rod 18 which responds to this, and the pushing rod 18 has a gas valve 8 facing the gas passage 7 connected to the burner 3. It works to control the opening and closing, and the ignition switch 19 is also made to respond to this.

The configuration so far is not particularly different from the conventionally known one. In the present invention, as shown in FIGS. 1 to 4, one end of the instrument body 1 is pivotally supported to provide two link pieces 23, 23, and the two link pieces 23 are provided. Bars 9a projecting the respective end portions of 23, 23 from the operation push button 9 in the pushing direction.
Pivotally support the instrument body 1 and the link pieces 23, 23, respectively.
And a bar 9a constitute a parallel link mechanism 20, and the operation rod 11 as the operated member is pushed in the middle of one of the two link pieces 23, which will be further explained. Then, the upper ends of the two link pieces 23, 23 are axially supported on the instrument body 1 by the shafts 23a, 23a with a space therebetween, and the lower ends of the two link pieces 23, 23 are used for operation. A bar 9a protruding from the push button 9 is pivotally supported by shafts 23b, 23b to form a parallel link mechanism 20 by the instrument body 1, the two link pieces 23, 23 and the bar 9a. The pressing piece 22 is provided with one of the link pieces 23, and the rod 11 is brought into contact with the pressing piece 22.

Thus, when the operation push button 9 is pressed, the operation push button 9 is moved by the parallel link mechanism 20. Therefore, as shown in FIG. 4b, the posture does not change even when the operation push button 9 is pushed. Therefore, since the front surface of the operation push button 9 does not tilt, it is easy to operate, and the one link piece 23
Increase the force to push the operation push button 9 with the rod 11
Therefore, the force for pressing the operation push button 9 can be reduced.

In the above embodiment, the push piece 22 is provided in the middle of the one link piece 23.
The operating rod 11 as the operated member is pushed by the push piece 22, but this is because the pin is projected from the middle of the link piece 23 toward the operated member and the pin is pushed to the operated member side. It is also possible to provide a long groove for engaging with and push the operated member with the pin.

Further, the tip of the operation rod 11 may be brought into contact with the back side of the link piece 23. In this case, the link piece 23 at the tip of the operating rod 11
Of the operating rod 11
The tip of the link piece may be twisted 90 ° so that it comes into contact with the back side of the link piece 23.

In the above-mentioned embodiment, the control of both the water valve 6 and the gas valve 8 of the instant water heater has been described, but it is also possible to control only one of them, for example, the gas valve 8 or the operating rod.
It is needless to say that 11 and push rods 13 and 18 may be integrated, and are not limited to instant water heaters, and can be applied to cooking stoves and other kitchen appliances as well as various devices.

(Effects of the Invention) The present invention having the above-described configuration has the following effects.

When the operation push button is pressed, the operation push button moves by the parallel link mechanism, so that the posture of the operation push button does not change, and the problem seen in the conventional example can be solved. It is also a lever that works in the direction of reducing the force to push the operation push button. Therefore, both the posture of the operation push button does not change and the operation of the operation push button can be performed with a simple force with a simple structure.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a schematic view showing the internal structure, FIG. 3 is an explanatory view of a part thereof, and FIG. 4 is a cutaway side view showing an operation push button portion. FIG. 5 is a cutaway side view showing a conventional operation push button portion. 1 ... Instrument body, 9 ... Operation push button 20 ... Parallel link mechanism, 23 ... Link piece

Claims (1)

[Scope of utility model registration request] 1. A push button for operation is provided on a front surface of an instrument main body, wherein an operated member in the instrument main body is pressed by the push button for operation, one end of which is pivotally supported on the instrument main body. The other end of each of the two link pieces is pivotally supported by a bar projecting in the pushing direction from the operation push button to form a parallel link mechanism by the instrument body, both link pieces and the bar. A push button device configured to push an operated member in the middle of one of the link pieces of the book.