JPS5829876Y2 - push button switch - Google Patents

Description

[Detailed description of the invention] This invention has a function of forcibly stopping itself when an abnormal operation occurs, such as an electromagnetic switch, and
The present invention relates to an improvement in a pushbutton switch used in electrical equipment that is equipped with a reset bar that returns the stopped state to an operable state.

Below, we will explain a push button switch of an electromagnetic switch with a push button as an example. This push button switch is equipped with a contact opening/closing mechanism inside, and the opening/closing of the electromagnetic switch is controlled by the first and second push buttons. I am doing it.

Further, when the reset bar of the overcurrent relay provided in the electromagnetic switch trips, it is reset by a reset button provided separately from the first and second push buttons.

As mentioned above, the pushbutton switch of the conventional electromagnetic switch with pushbutton is provided with the first and second pushbuttons and the reset button, which increases the number of parts and increases the cost of parts. The number of assembly steps increases and the work becomes complicated.

In addition, there were drawbacks such as complicated parts management.

This idea was made in order to eliminate the above-mentioned drawbacks of the conventional technology. By providing a single pushbutton with a contact opening function and a reset bar reset function, the number of parts can be reduced and costs can be reduced. It is an object of the present invention to provide a push button switch which is inexpensive and whose assembly efficiency is improved.

An embodiment of this invention will be described below with reference to the drawings.

Figure 1 shows the front of the pushbutton switch, Figure 2 shows the cross section taken along the line II-II in Figure 1, and Figure 3 shows the lll of Figure 1.
-III line, and Fig. 4 shows the push button on the OFF side. There is.

Reference numeral 2 denotes a second push button, which has a protrusion 2a on its back surface and a reset bar 3 of an overcurrent relay (not shown).
arm 2b formed to abut against a or 3b (see Figure 3).

2C is provided.

Note that the reason why a plurality of arms 2b and 2C are provided is when the reset bar 3 of the overcurrent relay is provided depending on the type of electromagnetic switch.
Even if the installation positions are different, this reset bar 3 and arm 2
b or 2C are in contact with each other.

4 is a cover that slidably incorporates and supports these push buttons 1 and 2, 5 is a push spring for returning the push buttons 1 and 2 to a predetermined position after being pressed, and 6 is a contact described later. 7 is a fixed contact provided on the first push button 1 side in the case 6, and 8 is a movable member that is elastically biased to be always separated from the fixed contact 7. The contact 9 is a fixed contact provided on the second push button 2 side in the case 6, and 10 is a movable contact that is elastically biased to be in constant contact with the fixed contact 9. .

The movable contacts 8 and 10 are integrally formed, and either a normally open or normally closed contact may be selected depending on the mode of use.

Next, the operation of the above device will be explained.

When the first push button 1 is pressed to start the load, the protrusion 1a provided on the push button 1 pushes the movable contact 8, and the movable contact 8 and the fixed contact 7 are brought into contact with each other. The electromagnetic switch operates when the coil of the electromagnetic switch is energized.

Although not shown in the drawings, the energization state of the coil is maintained until the second push button 2 is pressed or the like and the operation is stopped.

When the second push button 2 is pressed, the protrusion 2a pushes the movable contact 10, separating the movable contact 10 from the fixed contact 9, cutting off the current to the coil, and opening the electromagnetic switch. make it work.

Next, when the overcurrent relay trips and its reset lever 3a rises (see Figure 3), when the second push button 2 is pressed, the protrusion 2a pushes the movable contact 10, and the movable contact 10 and the fixed contact 9, the reset button 3a pushed up by the trip is placed on either the arm 2b or 2C provided on the second push button 2.
Or 3b comes into contact and pushes down this reset par 3 to reset it.

In this case, the respective dimensions of the protrusion 2a and the arms 2b, 2C are adjusted so that the reset button 3 is pressed down and reset after the fixed contact 9 and the movable contact 10 are separated, so that the fixed contact 9 The overcurrent relay is not reset with the movable contactor 10 in the closed state, and there is no danger even if the reset function is performed using only the second push button 2.

Furthermore, when the overcurrent relay is not tripped, the reset button 3 is in a depressed state, so the arm 2b or 2C and the reset button 3 do not come into contact (even if they do, there is no play in the reset button 3). 2), and does not interfere with the opening/separation operation with the fixed contact 9.

Note that since the second push button 2 is made of synthetic resin, even if the arms 2b and 2C are provided, the X--
By using a molding chamber that is divided into two along the plane indicated by Y, it is possible to easily create the molding chamber in the same way as the conventional molding chamber in which the arms 2b and 2C are not provided.

Additionally, although this is unrelated to the gist of this invention, when used as a pushbutton switch that does not require a reset function,
It is only necessary to replace a pushbutton formed in the same way as the first pushbutton 1 with the second pushbutton 2, resulting in a standardized pushbutton switch.

As described above, the push button switch according to this invention has the function of separating the fixed contact and the movable contact and the function of resetting a tripped reset button using one push button provided with an arm. With this configuration, the reset button can be omitted, resulting in an inexpensive device, and the assembly efficiency can be improved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a pushbutton switch according to this invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is a sectional view taken along the line II--II of Fig.
The figure is a partial cross-sectional view taken along the line III-III in Figure 1.
The figure is a perspective view showing an example of a pushbutton according to this invention. In the figure, 1 is a first push button, 1a is a protrusion, 2 is a second push button, 2a is a protrusion, 2b and 2C are arms, 7.
9 is a fixed contact, and 8.10 is a movable contact. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Scope of utility model registration request] (1) In a pushbutton switch that is attached to an electrical device that is equipped with a function to forcibly stop itself when an abnormal operating state occurs and a reset bar that returns the self-stop state to operable state, and that controls the operation of this electrical equipment. , a push button is provided with a protrusion that opens the normally closed fixed contact and the movable contact to cut off power to the electrical device, and an arm that abuts the reset bar to return the device to an operable state; Further, the protrusion and the arm are each disposed at a position where the arm presses the reset bar after the protrusion separates the fixed contact and the movable contact. switch. (2) Utility model registration claim 1, characterized in that the arm that comes into contact with the reset bar is provided at multiple locations.
Push button switch described in section.