JP5433428B2 - Auxiliary contact unit for electromagnetic contactor and electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic contactor and an auxiliary contact unit for an electromagnetic relay, and more particularly to an electromagnetic contactor and an auxiliary contact unit for an electromagnetic relay that can be easily attached to and detached from the electromagnetic contactor and the electromagnetic relay.

An electromagnetic contactor and an electromagnetic relay are used to supply power to, for example, a device such as an electric motor, and to disconnect the auxiliary contact unit having an auxiliary contact that operates in synchronization with the electromagnetic contactor and the electromagnetic relay. It can be attached to and detached from the contactor and electromagnetic relay.
As is well known, the electromagnetic contactor and the electromagnetic relay are operated by an electromagnetic force generated by the exciting coil, and have contacts that are turned on and off in synchronization with the movement of the first movable part incorporated therein. Further, the auxiliary contact unit has a second movable portion for inserting and releasing the built-in auxiliary contact. When the auxiliary contact unit is attached to the electromagnetic contactor and the electromagnetic relay, the first and second movable parts are connected to synchronize the operation of the electromagnetic contactor and the electromagnetic relay. It can play the role of opening and closing minute currents such as currents and control signals.
Patent Document 1 and Patent Document 2 disclose structures for attaching an auxiliary contact unit to an electromagnetic contactor and an electromagnetic relay, and both show examples of using engagement protrusions.

Japanese Patent Laid-Open No. 6-223689 Japanese Utility Model Publication No. 57-152737

  In the mounting structure disclosed in the above-mentioned patent document, mounting and removal are not always easy. After connecting the first movable part of the electromagnetic contactor and the electromagnetic relay and the second movable part of the auxiliary contact unit, the engaging protrusions of the auxiliary contact unit are connected to the outer surface mounting grooves of the electromagnetic contactor and electromagnetic relay. It will be installed so as to get over the edge of the. However, as can be seen from FIGS. 1 and 2 of Patent Document 1, the remaining one is difficult to align regardless of which of the movable portion or the engaging protrusion is aligned first. This is because the positions of both units are not fixed with respect to the housing of each unit. Also, removal is not always easy. This is because, for example, the engaging protrusion is pushed by the tip of the driver and removed.

Furthermore, even if the auxiliary contact unit, the electromagnetic contactor, and the electromagnetic relay are in the attached state, they can move to some extent in the direction of the coupling surface. For this reason, it is conceivable that the coupling surface wears due to vibrations caused by opening and closing of the electromagnetic contactor and the electromagnetic relay, and the looseness is likely to occur and easily come off. Moreover, it becomes easy to remove | deviate by the dispersion | variation in component dimensions.
In view of the above problems, an object of the present invention is to provide an electromagnetic contactor and an auxiliary contact unit for an electromagnetic relay that can be easily attached to and detached from the electromagnetic contactor and the electromagnetic relay.

  In order to solve the above problems, the present invention provides an auxiliary contact unit including an auxiliary contact that operates in synchronization with an electromagnetic contactor and an electromagnetic relay, the electromagnetic contactor and the electromagnetic relay having a recess in a case, and the recess A first mounting groove provided in the inner direction from the first and a second mounting groove provided in the end of the case, and the auxiliary contact unit has a convex portion on the case, and the convex portion on the outer side from the convex portion. A fixed hook provided projecting on the surface of the case, a slide plate that slides on the surface of the case, and a movable hook provided on an end of the slide plate, and the movable hook of the auxiliary contact unit includes the electromagnetic contactor and In a state of being separated from the second mounting groove of the electromagnetic relay, the fixing hook of the auxiliary contact unit is in the first mounting groove of the electromagnetic contactor and the electromagnetic relay, and the convex portion of the auxiliary contact unit is the electromagnetic After being inserted into the recesses of the contactor and the electromagnetic relay, the movable hook of the auxiliary contact unit is moved to the case side of the electromagnetic contactor and the electromagnetic relay, and the slide plate slides on the surface of the case, The movable contact hook of the auxiliary contact unit is engaged with the second attachment groove of the electromagnetic contactor and the electromagnetic relay, whereby the auxiliary contact unit is attached to the electromagnetic contactor and the electromagnetic relay.

  According to the present invention, it is possible to provide an electromagnetic contactor and an auxiliary contact unit for an electromagnetic relay that can be easily attached to and detached from the electromagnetic contactor and the electromagnetic relay, thereby contributing to improvement in user convenience.

It is a perspective view which shows the auxiliary contact unit and electromagnetic contactor in one Example of this invention. It is sectional drawing of the auxiliary contact unit in one Example of this invention. It is a side view which shows the attachment method of the auxiliary contact unit with respect to the electromagnetic contactor in one Example of this invention. It is a perspective view which shows the removal method of the auxiliary contact unit in one Example of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an auxiliary contact unit and an electromagnetic contactor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the auxiliary contact unit in one embodiment of the present invention. 2 is a cross-sectional view taken along the broken line in FIG.

In FIG. 1, the left side is an electromagnetic contactor, and the right side is an auxiliary contact unit.
In the auxiliary contact unit, 11 is a fixed hook projecting from the case 1, and 12 is a convex portion provided on the case 1. 21 is a movable hook projecting from the slide plate 2 that moves in the vertical direction in the drawing, 31 is a movable insulating stand convex portion for inserting or releasing the auxiliary contact of the auxiliary contact unit (into the second movable portion described above) Equivalent).
In the electromagnetic contactor, reference numeral 41 denotes a movable insulating base concave portion (corresponding to the first movable portion described above) engaged with the movable insulating base convex portion 31 of the auxiliary contact unit. Reference numeral 42 denotes a mounting groove for hooking the movable hook 21 of the auxiliary contact unit and coupling both. Reference numeral 43 denotes a groove for hooking the fixing hook 11 of the auxiliary contact unit to connect both, and a concave portion for positioning the auxiliary contact unit by inserting the case convex portion 12.
In the auxiliary contact unit shown in FIG. 2, reference numeral 5 denotes a return spring that is disposed between the slide plate 2 and the case 1 and applies a load in a direction to reduce the distance between the movable hook 21 and the fixed hook 11.

  The two fixing hooks 11 of the auxiliary contact unit are inserted into the two grooves 43 of the electromagnetic contactor, and the two convex portions 12 of the auxiliary contact unit are also inserted into the two concave portions 43 of the electromagnetic contactor, so that the auxiliary contact unit Positioning with respect to the electromagnetic contactor. Further, as will be described later, the auxiliary contact unit is attached to the electromagnetic contactor by engaging the movable hook 21 of the auxiliary contact unit with the attachment groove 42 of the electromagnetic contactor. At this time, the movable insulating base convex portion 31 of the auxiliary contact unit and the movable insulating base concave portion 41 of the electromagnetic contactor are engaged, so that the auxiliary contact of the auxiliary contact unit receives a weak current or a minute current such as a control signal. Can play the role of opening and closing.

Next, a method for attaching the auxiliary contact unit to the electromagnetic contactor will be described.
FIG. 3 is a side view showing a method of attaching the auxiliary contact unit to the electromagnetic contactor in one embodiment of the present invention. This will be described with reference to FIGS.

  First, after the fixing hook 11 protruding from the case 1 of the auxiliary contact unit is inserted into the mounting groove 43 of the electromagnetic contactor, the entire auxiliary contact unit is pushed in the direction of the electromagnetic contactor, so that the case convex part 12 becomes the concave part 43 And the auxiliary contact unit is positioned. The movable hook 21 protruding from the slide plate 2 engages with the mounting groove 42 by the taper portion at the tip sliding on the side surface of the electromagnetic contactor and moving to the upper surface. At that time, since the load is applied to the slide plate 2 by the return spring 5, the movable hook 21 is pressed against the mounting groove 41 and fixed so that there is no backlash.

As described above, since the fixing hook 11 is simply inserted into the mounting groove 43 and the auxiliary contact unit is pushed into the electromagnetic contactor side, the mounting can be easily performed. Even when the installation space is small, the surrounding objects do not get in the way and can be installed easily. Further, since the movable hook 21 is pressed from the upper side of the electromagnetic contactor, there is no problem in dimensional change or variation of the electromagnetic contactor, and the auxiliary contact unit can be prevented from dropping off due to vibration or the like.
Further, since the positioning is fixed between the concave portion 43 and the convex portion 12 of the case, the user needs to be aware of the engagement between the movable insulating base convex portion 31 of the auxiliary contact unit and the movable insulating base concave portion 41 of the electromagnetic contactor. There is a merit that there is no. This also greatly contributes to easy installation.

FIG. 4 is a perspective view showing a method of removing the auxiliary contact unit in one embodiment of the present invention.
The slide plate 2 is pulled by a return spring 5. A part of the slide plate 2 is bent to form an integrated lower surface 22 and the lower surface 22 is pushed in as shown by the arrow in FIG. 4 so that the movable hook 21 is detached from the mounting groove 42 and can be easily removed. it can. It is not necessary to use a tool such as a driver as described above.

  The embodiment described above is an example, and many modifications based on the gist of the present invention can be considered. Both are within the scope of the present invention.

  1: Case, 11: Fixed hook, 12: Case convex part, 2: Slide plate, 21: Movable hook, 22: Slide plate lower surface, 31: Movable insulating base convex part, 41: Movable insulating base concave part, 42: Mounting groove 43: mounting groove and recess, 5: return spring.

Claims (4)

An auxiliary contact unit comprising an auxiliary contact that operates in synchronism with an electromagnetic contactor or electromagnetic relay used to supply and disconnect power,
The electromagnetic contactor or electromagnetic relay is
The case has a recess, a first mounting groove provided in the inner direction from the recess, a second mounting groove provided at the end of the case, and an auxiliary contact included in the auxiliary contact unit. A movable insulating base recess to be engaged with the movable insulating base convex portion for,
The auxiliary contact unit is
And the convex portion into the case, a fixed hook that protrudes to the outside direction from the convex portion, and the slide plate to have a slide hole the surface of the casing, movable hook provided at an end portion of the slide plate And further having the movable insulating base convex portion protruding from the hole portion of the slide plate,
With the movable hook of the auxiliary contact unit being separated from the second mounting groove of the electromagnetic contactor or electromagnetic relay, the fixed hook of the auxiliary contact unit is in the first mounting groove of the electromagnetic contactor or electromagnetic relay. After the movable insulating base convex portion of the auxiliary contact unit is inserted into the movable insulating base concave portion of the electromagnetic contactor or electromagnetic relay,
The movable hook of the auxiliary contact unit is moved to the case side of the electromagnetic contactor or electromagnetic relay, and the slide plate slides on the surface of the case of the auxiliary contact unit, whereby the movable hook of the auxiliary contact unit is moved to the electromagnetic contactor. second by being engaged with the mounting groove, an electromagnetic contactor or electromagnetic relay auxiliary contact unit and the auxiliary contact unit is characterized in that it is attached to the electromagnetic contactor or electromagnetic relay of the contactor or electromagnetic relay. The auxiliary contact unit for an electromagnetic contactor or electromagnetic relay according to claim 1, wherein the convex part and the fixing hook of the auxiliary contact unit, and the concave part and the first mounting groove of the electromagnetic contactor or electromagnetic relay are each two pieces. There, an electromagnetic contactor or electromagnetic relay auxiliary contact unit and said second attachment groove of the movable hook of the auxiliary contact unit and the electromagnetic contactor or electromagnetic relay are each one. 2. The auxiliary contact unit for an electromagnetic contactor or electromagnetic relay according to claim 1, further comprising an elastic body between a case and a slide plate of the auxiliary contact unit, and the movable hook is connected to the electromagnetic contactor or the electromagnetic wave by a load of the elastic body. An electromagnetic contactor or an auxiliary contact unit for an electromagnetic relay, wherein the electromagnetic contactor is engaged with a second mounting groove of the relay. 2. The auxiliary contact unit for an electromagnetic contactor or an electromagnetic relay according to claim 1, wherein the slide plate of the auxiliary contact unit has an end face that does not contact the case surface, and the auxiliary contact unit is movable by pressing the end face. hook is deviated from the second mounting groove of said electromagnetic contactor or electromagnetic relay, an electromagnetic contactor wherein the auxiliary contact unit, characterized in that the removed from the electromagnetic contactor or electromagnetic relay or an auxiliary electromagnetic relay Contact unit.

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