JP2018055962A - Emergency stop switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency stop switch for stopping a malfunction in which a fixed contact and a movable contact instantaneously become ON state due to influence of chattering or the like when an impact or vibration is applied to the switch immediately after the switch is turned OFF.SOLUTION: In the emergency stop switch, in an ON state of the switch, a fixed contact 11 and a movable contact 12 are urged in a direction of contact, after depressing operation of a switch converter 13, an insulating holding plate (shielding plate) 14 is inserted between the fixed contact 11 and the movable contact 12.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an emergency stop switch that immediately stops a malfunction in which a fixed contact and a movable contact are turned on due to chattering or the like when an impact or vibration is applied to the switch immediately after the switch is turned off. is there.

  Conventionally, an emergency stop switch is integrated with a first leaf spring having a movable contact in a normal state (ON state) as shown in FIGS. 6 and 7 (see Patent Document 2 below), for example. The second leaf spring is displaced by coming into contact with the lower transducer, creating a contact force between the movable contact and the fixed contact. Further, in the normal state (ON state), the substantially L-shaped first leaf spring is in a bent state so that a biasing force is generated in a direction in which the movable contact is separated from the fixed contact. Further, in the locked state (OFF state), the upper transducer interlocked with the button operation acts downward, and the displacement of the first leaf spring and the displacement of the second leaf spring and the plunger are each 0 ( The downward energy by the first leaf spring is reduced).

Japanese Patent No. 3909082 Japanese Patent No. 5340892

  However, as shown in Patent Documents 1 and 2 in the conventional emergency stop switch, since each displacement goes to 0 after the switch is turned off, the energy in the direction in which the fixed contact and the movable contact are separated is There is a possibility that the fixed contact and the movable contact are turned on immediately after the switch is turned off.

  In view of the above situation, an object of the present invention is to provide an emergency stop switch capable of reducing the influence of chattering or the like due to external impact or vibration immediately after the switch is turned off and avoiding malfunction of the switch.

In order to achieve the above object, the present invention provides
[1] In the emergency stop switch, when the switch is in the ON state, the fixed contact and the movable contact are urged in the contact direction, and after the switch converter is pushed down, the insulation between the fixed contact and the movable contact is achieved. A holding plate is inserted.

  [2] In the emergency stop switch described in [1] above, when the converter acts in the push-down direction by the push-down operation, the insulating holding plate spreads in a direction perpendicular to the push-down direction by the cam mechanism, and the fixed contact and the movable contact An insulating holding plate enters between the two.

  According to the present invention, the following effects can be achieved.

  Even if an impact or vibration is applied after the switch converter is pushed down, the insulating holding plate (shielding plate) inserted between the fixed contact and the movable contact momentarily turns the fixed contact and the movable contact ON. Can be stopped, and safety can be improved.

  Moreover, even when an arc is generated between the fixed contact and the movable contact at the time of transition from the ON state to the OFF state, it is generated between the fixed contact and the movable contact by the insulating holding plate (shielding plate). The arc can be interrupted.

It is a perspective view of the whole component by which the emergency stop switch which decomposed | disassembled the Example of this invention was decomposed | disassembled. It is a perspective view which shows the normal state of the opening / closing part which shows the principal part of this invention. It is a perspective view which shows the locked state of the opening / closing part which shows the principal part of this invention. It is sectional drawing which shows the normal state of the opening / closing part which shows the principal part of this invention. It is a cross-sectional perspective view which shows the locked state of the opening / closing part which shows the principal part of this invention. It is a figure which shows the normal state inside the opening-and-closing part of patent document 2 (patent 5340892) as a prior art example (photographed with X-rays). It is a figure which shows the lock state inside the opening-and-closing part of patent document 2 (patent No. 5340892) as a prior art example (photographed with X-rays).

  The emergency stop switch of the present invention is urged in a direction in which the fixed contact and the movable contact come into contact with each other in the ON state of the switch, and after the pressing operation of the switch converter, the insulating contact is provided between the fixed contact and the movable contact. Insert the holding plate (shielding plate).

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is an exploded perspective view of an entire part of an emergency stop switch according to an embodiment of the present invention.

  In this figure, 1 is an operation button, 2 is a coil spring A, 3 is a torsion coil spring, 4 is a plunger, 5 is a spring, 6 is a waterproof rubber, 7 is a housing, 8 is a round nut, and 10 is a key of the embodiment of the present invention. Opening and closing parts of the emergency stop switch showing the parts, 11 to 17 are parts constituting the opening and closing part, 11 is a fixed contact, 12 is a movable contact, 13 is a converter, 14 is an insulating holding plate (shielding plate), 15 is a coil spring B, 16 is a coil spring C, and 17 is a case.

  2 is a perspective view showing a normal state of the opening / closing part showing the main part of the present invention, FIG. 3 is a perspective view showing a locked state of the opening / closing part showing the main part of the invention, and FIG. 4 shows the main part of the invention. FIG. 5 is a cross-sectional perspective view showing a locked state of the opening / closing part showing a main part of the present invention.

  Here, in the normal state of the opening / closing part in FIG. 4, the fixed contact 11 and the movable contact 12 are in contact and the switch is in the ON state. In the locking state of the opening / closing part in FIG. An insulating holding plate (shielding plate) 14 is inserted between the fixed contact 11 and the movable contact 12. That is, when the converter 13 acts in the downward direction in the figure, the insulating holding plate (shielding plate) 14 spreads left and right in the figure by the cam mechanism, and the insulating holding plate (between the fixed contact 11 and the movable contact 12 ( The shielding plate 14 is configured to enter.

  Since it comprised in this way, according to this invention, even if an impact and a vibration are added after pushing down the switch converter, the insulating holding plate (shielding plate) inserted between the fixed contact and the movable contact is provided. It is possible to prevent the fixed contact and the movable contact from being turned on instantaneously, and to improve safety.

  Further, even when an arc is generated at the time of transition from the ON state to the OFF state, the arc between the fixed contact and the movable contact can be interrupted by the inserted insulating holding plate (shielding plate).

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  In the emergency stop switch of the present invention, the insulating holding plate (shielding plate) inserted between the fixed contact and the movable contact is instantaneously fixed contact even if an impact or vibration is applied after the switch converter is pushed down. And the movable contact can be prevented from being turned on, and can be used as an emergency stop switch with improved safety.

1 Operation button 2 Coil spring A
3 Torsion coil spring 4 Plunger 5 Spring 6 Waterproof rubber 7 Housing 8 Round nut 10 Open / close part of emergency stop switch 11 Fixed contact 12 Movable contact 13 Transformer 14 Insulating holding plate (shielding plate)
15 Coil spring B
16 Coil spring C
17 cases

Claims (2)

  When the switch is in an ON state, the fixed contact and the movable contact are urged in a contact direction, and after the switch converter is pushed down, an insulating holding plate is inserted between the fixed contact and the movable contact. And an emergency stop switch.   2. The emergency stop switch according to claim 1, wherein when the converter acts in the push-down direction by the push-down operation, the insulating holding plate spreads in a direction perpendicular to the push-down direction by the cam mechanism, and the fixed contact and the movable contact are insulated. An emergency stop switch characterized by the insertion of a retaining plate

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