JPS6410898B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manual reset type relay that is activated by an abnormal signal current sent from an abnormality detection circuit in a system such as a boiler and reset by manual operation.

Conventionally, there are few relays of this type that can operate properly under various conditions. For example, JP-A-57-
Publication No. 60631 discloses a technology in which a switch changeover bar (reset bar) is actuated by the operation of an abnormal current actuation section that is activated by an abnormal current, and a guide protrusion provided on the switch changeover bar is removed to change the switch. There is. However, since the end of the switch bar protrudes outside for manual reset, if the switch bar is inoperable due to contact with an external foreign object, even if the abnormal current operating section is activated, , a serious drawback was pointed out that the switch did not switch.

The present invention was made by focusing on the problems of the conventional manual reset type relay, and aims to provide a manual reset type relay that operates reliably even when the switch changeover bar is suppressed. be.

The present invention will be explained below based on the accompanying drawings.

FIG. 1 shows a front view of a manual reset type relay A of the present invention, and FIG. 2 shows a side view thereof. In the figure, 1
2 is a case made of plastic or the like, 2 is an insulating substrate, and 3 is a support plate consisting of a U-shaped metal plate having an upper wall 3a, a side wall 3b, and a bottom wall 3c, and is fixed to the substrate 2 at the bottom wall 3c.

The main body of the manual reset type relay A of the present invention is composed of an electromagnetic actuating part _A1 , a reset bar _A2 , and a switching point part _A3 provided on the opposite side _of the electromagnetic actuating part _A1 via the reset bar A2. Ru.

First, the electromagnetic actuating part _A1 includes an electromagnetic coil 4 fixed to the bottom wall 3c of the support plate 3, and an electromagnetic coil 4 fixed to the bottom wall 3c of the support plate 3.
An armature 7 is provided facing the iron core tip 6 of the iron core. When the electromagnetic coil 4 is energized via the terminal 5, it operates and magnetizes the tip 6 of the iron core. The armature 7 is the bottom wall 3c of the support plate 3.
It comes into contact with and separates from the iron core tip 6 using the tip as a fulcrum, but in a steady state without electricity, the base end 7' is pulled by the spring 8 housed in the board 2, and the tip The portion 7'' is urged toward the reset bar _A2 and comes into contact with the reset bar _A2 , and the armature 7 is separated from the iron core tip portion 6 at a predetermined distance.

Next, the reset bar _A2 is supported by the substrate 2,
movably slides into a cylinder 10 housing a spring 9;
a bar 11 that is always urged upward by a spring 9;
It consists of a slidable lever 12 that extends through the bar 11 in a direction perpendicular to the axial direction of the bar 11. A protrusion 13 is formed at one end of the lever 12, and the tip 7'' of the armature 7 is slidably inserted through an engagement hole 13a formed in the protrusion 13. The lever 1 is configured to be displaceable in the longitudinal direction of the armature 7.
A boat-shaped guide protrusion 14 is provided at the other end of the guide protrusion 14 . This guide protrusion 14 projects at an angle with respect to the axial direction of the bar 11, and under normal conditions, this guide protrusion 14 protrudes to the outside of the bar 11 because the lever 12 is pressed by the tip 7'' of the armature 7. Note that 15 is a stopper provided protruding from the side surface of the bar 11 to prevent the bar 11 from protruding beyond a predetermined amount.Furthermore, 16 is a tip pressing portion of the bar 11.

Next, the switching contact part A ₃ includes a normally closed contact plate 17 having a contact 17a at the upper end, a normally open contact plate 18 having a contact 18a at the upper end and connected to an abnormal current display device (not shown), and further The movable switching contact plate 19 has a double-sided contact 19a on the upper part and switches between the contact plates 17 and 18. It is erected in In addition, the moving switching contact plate 19
is attached with its upper part inclined so that it is always in contact with the normally open contact plate 18, and a protruding piece 20 is integrally provided at the tip thereof toward the guide protrusion 14 of the lever 12, and in the normal state, the guide protrusion 14 is pressed toward the normally closed contact plate 17 side, and the contact 19
a is in contact with the contact 17a. The material of the switching contact portion _A3 is entirely made of a conductive plate material or the like.

Next, the operation of the present invention having the above configuration will be explained in the third section.
4, and FIG. 5, which shows the operating state of the contact plate.

First, when the coil is not energized, as shown in FIGS. 1 and 2, the base end 7' of the armature 7 is pulled by the spring 8 and the electromagnetic coil 4 is pulled.
The guide protrusion 1 is separated from the iron core tip 6 by pressing the lever 12 at the tip 7''.
4 protrudes from the outer surface of the bar 11, and the movable switching contact plate 19 is connected to the protruding piece 20 by the protruding guide protrusion 14.
is pressed toward the normally closed contact plate 17 through the contact plate 17, and both contacts 19a and 17a are in contact with each other.

When the coil is energized in such a normal state, a magnetic force is generated in the iron core tip 6 to attract the armature 7 and hold it in close contact with the iron core tip 6. The tip 7'' of the armature 7 then pulls the projection 13 outwards and slides the lever 12 in the opposite direction to the switching contact A ₃ , so that the guide projection 14 is retracted into the bar 11. The protruding piece 20 at the tip of the contact plate 19 is released from the pressure by the guide protrusion 14 and rebounds toward the normally open contact plate 18 as shown in FIG.
comes into contact with.

In addition, when the switching contact section is returned to the non-energized state after the coil is energized as described above, the pressing section 16 of the bar 11 is pressed and the guide protrusion 14 is moved as shown in FIG. 5b. When the pressure is released after positioning the protruding piece 20 of No. 19 below, the guide protrusion 14 moves upward while moving the protruding piece 20 along the positions of points a, b, and c on the upper surface of the guide protrusion 14. 5c, the contact 19a of the movable switching contact plate 19 is connected to the contact 1 of the normally closed contact plate 17.
It is pressed into contact with 7a and returns to the normal state of non-energization.

As described in detail above, the present invention includes a lever that slides in conjunction with the armature, which approaches and separates depending on whether or not the electromagnetic coil is energized. Since the movable switching contact plate is configured to switch, the structure is extremely simple compared to conventionally known manual reset type relays, and once the movable contact is switched by the guide protrusion of the lever, the reset bar can be set at any position. Since it is possible to switch between release and release, it is possible to provide an extremely reliable changeover switch that operates reliably when the coil is energized even when the reset bar is suppressed by a foreign object or the like coming into contact with it.

[Brief explanation of drawings]

FIG. 1 is a front view of the manual reset type relay of the present invention.
Fig. 2 is a side view, Fig. 3 is a front view showing the operating state of the manual reset type relay of the present invention, Fig. 4 is a side view, and Fig. 5 shows the switching contact section in steady state (no current applied). It is an explanatory diagram of an operating state in the case of returning to the state. 1... Case, 2... Board, 3... Support plate, 4
...Electromagnetic coil, 6... Iron core tip, 7... Armature, 11... Bar, 12... Lever, 13... Projection, 1
4... Guide projection, 17... Normally closed contact plate, 18... Normally open contact plate, 19... Moving switching contact plate, 20... Projecting piece,
A...Manual return type relay, _A1 ...Electromagnetic actuator, _A2 ...
Reset bar, A ₃ ...Switching contact section.

Claims (1)

[Claims] 1. An electromagnetic actuating part consisting of an electromagnetic coil that is actuated by energization, and an armature that approaches and separates from the electromagnetic coil depending on the presence or absence of electricity, and an electromagnetic actuating part that is provided through the electromagnetic coil in a direction perpendicular to the axial direction and has a guide protrusion protruding from one end. The lever has a lever configured such that the other end thereof is engaged with the armature so as to be interlocked with the armature and can be displaced in the longitudinal direction with respect to the armature, and is biased by a spring to move in the axial direction. A reset bar that is movably provided on the support plate, and a switching contact section in which the contact plate, which is movably switched by the guide protrusion, is separated and arranged between the normally closed contact plates and the normally closed contact plate, are respectively attached to the support plate. Or a manual return type relay characterized by being supported on a board.