JPH077628B2 - Electromagnetic contactor - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electromagnetic contactor having a plug connection type terminal.

[Conventional technology]

9 to 11 show a conventional electromagnetic contactor,
FIG. 9 is a front sectional view, FIG. 10 is a plan view, and FIG. 11 is an assembly drawing of a fixed contact. In each figure, (1) is a molded housing, (2) is a base, and (3) is a fixed contact arranged in pairs for each pole. As shown in FIG. It is installed. That is, the fixed contactor (3) having a U-shaped inside dimension that is a dimension Y smaller than the width dimension X of the fixed contactor attachment portion (1a) of the housing (1) is fitted into the attachment portion (1a). At this time, the fixed contact (3) is fixed to the housing (1) by a spring force that expands the U-shaped dimension Y of the fixed contact (3) to the dimension X of the mounting portion (1a) of the housing (1). . The fixed contact (3a) is attached to one end of the fixed contact (3),
The movable contacts (4) are arranged so as to face the movable contacts (4a) provided at both ends of the movable contact (4). Further, a screw hole (3b) is formed in the fixed contactor (3), and the male terminal (5) having a plug-in connection is screwed and fixed by a tightening screw (6).

The tip portion (5a) of the plug-in connection type male terminal (5) is formed in a shape into which a plug-in connection type female terminal (connector) (not shown) is to be fitted. A crossbar (16) connects the movable iron core (7) at the lower end thereof, and holds the movable contactor (4) provided for each pole vertically slidably at the upper part thereof. (8) shows a contactor spring that applies contact pressure to the movable contactor (4).

The cross bar (16) is slidably held by the housing (1) so that it can move up and down in FIG. (9) shows a fixed iron core, and (10) shows an operating coil, both of which are fixed by the housing (1) and the base (2). Reference numeral (11) is a trip spring and is arranged so as to urge the crossbar (16) upward. The fixing screw (12) fixes the housing (1) to the base (2).
Reference numeral (30) is a coil frame around which the operation coil (10) is wound. A coil terminal (31) is fitted in the coil frame (30), and the terminal of the operation coil (10) is connected to one end of the coil terminal (31). ing. A male screw hole (32) having a female screw hole at the other end is fastened to the female screw hole to fix the substantially L-shaped male and female male terminal (32). The tip portion (32a) of the plug-in connection type male terminal (32) is formed in a shape into which the plug-in connection type female terminal (not shown) is to be fitted.

Next, the operation will be described.

The movable iron core (7) is attracted to the fixed iron core (9) by the attractive force of the magnetic flux generated by applying a voltage to the operation coil (10). As a result, the cross bar (16) connected to the movable iron core (7) overcomes the drag force of the trip spring (11) and moves downward in FIG. The movable contactor (4) held by the crossbar (16) also moves downward, and its movable contact (4a) comes into contact with the respective fixed contacts (3a) facing each other. Since the dimensions of each part are determined so that the crossbar (16) can move downward a little further than this contact position, the crossbar (16) slightly falls below the contact contact position (overtravel amount). Therefore, the contact spring (8) is compressed, and this compressive force is applied to the movable contactor (4) to generate contact pressure, and the fixed contactor (3) on the right side of FIG. Conduction is made between 3).

On the contrary, by turning off the voltage of the operation coil (10), the electromagnetic force between the movable iron core (7) and the fixed iron core (9) disappears,
The crossbar (16) moves to the 9th position by the force of the trip spring (11).
Since it moves in the upward direction in the figure, the contact between the movable contact (4a) and the fixed contact (3a) is broken and the circuit is opened. The circuit closing and opening operations of the electromagnetic contactor are as described above.

Next, the operation of connecting and disconnecting the connector to and from the male and female terminals (5) and (32) will be described. In FIG. 9, a male terminal (not shown) is inserted and connected in the direction of arrow A. On the contrary, the female terminal is pulled out in the direction of arrow B. During this detaching operation, the connection between the female terminal (not shown) and the plug-in type male terminals (5) and (23) is often difficult, and the connection is made in the direction of arrow C in FIG. Be pulled out while

[Problems to be Solved by the Invention]

Since the conventional electromagnetic contactor is configured as described above,
When the female terminal is removed from the plug-in type male terminal (5), forces in the B and C directions shown in FIG. 9 are also applied to the fixed contact (3). Therefore, the U-shaped inside dimension Y of the fixed contactor (3) shown in FIG. 11 is expanded and exceeds the stress limit of the spring property, so that the Y dimension is permanently deformed and the X-axis of the housing (1) is changed. Close to size or X
It will be larger than the size.

As a result, the fixing to the housing (1) becomes loose, and in the worst case, there may be rattling or a change in the overtravel amount due to a change in the position of the fixed contact (3a), or even a drop. Therefore, it is necessary to take measures such as increasing the plate thickness of the fixed contactor (3) to increase the fixing force to the housing (1), but even if these measures are taken, an unexpectedly large removal force is required. I couldn't get rid of my anxiety about.

In addition, when removing the female terminal from the plug-in type male terminal (32), if the force when removing the female terminal (force in the direction of arrow BC) is applied, the coil terminal (31) or plug-in type male terminal (32)
Is deformed, the terminal portion of the operation coil (10) connected to the end portion of the coil terminal (31) is broken, and becomes inoperable. Further, there is a problem that the number of parts is large and assembly takes time.

The present invention has been made in order to solve the above-mentioned problems, and aims to increase the strength at the time of attaching and detaching a female terminal of a plug-in connection type, and to prevent the fixed contact and coil terminal from rattling during operation. The purpose of the present invention is to obtain an inexpensive electromagnetic contactor that prevents deformation and deformation.

[Means for Solving the Problems]

The electromagnetic contactor according to the present invention has a fixed contact formed by bending a metal plate having a contact portion at one end and a plug-connecting male terminal formed at the other end in a terminal cover molded with resin. The male terminal is inserted and projected from the slit provided in the terminal cover, and the terminal cover is inserted and fixed in the recess and groove of the housing.

Further, when the terminal cover is inserted into the recess and groove of the housing, the pin provided on the lower surface of the terminal cover is engaged with the stop recess of the housing at the insertion position.

Further, the tongue piece provided on the fixed contact is inserted into the groove provided on the interelectrode wall of the housing.

Further, a male terminal for insertion connection provided at one end of the coil terminal is inserted through a slit for coil terminal provided at an end portion of the terminal cover.

[Action]

According to the present invention, each plug-in type male terminal is positioned and fixed by the slit provided in the terminal cover, and the terminal cover is fixed by the recess and groove of the housing.

Further, the tongue piece of the fixed contact and the groove of the housing suppress the vertical movement amount of the fixed contact.

Further, the pin of the terminal cover prevents the terminal cover from being detached.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. First
1 is a front sectional view of the embodiment, FIG. 2 is a plan view of FIG. 1 taken in the direction of arrow D, FIG. 3 is a side half sectional view taken in the direction of arrow E of FIG. 1, and FIG. It is a -F sectional view, and shows a sectional view of a coil terminal portion. FIG. 5 is an exploded perspective view showing an assembling method of the terminal cover and the fixed contact, and FIG. 6 is a Z arrow view of FIG.
The figure is a partial perspective view of the housing, and FIG. 8 is an exploded perspective view showing the connection between the operation coil and the coil terminal.

In each figure, the same parts as those in the conventional example are denoted by the same reference numerals. That is, (1) is a housing, (2) is a base, and (4)
Is a movable contactor, (16) is a crossbar, (7) is a movable iron core, (8) is a contactor spring, (9) is a fixed iron core, (10) is an operating coil, (11) is a trip spring, ( 12) shows a fixing screw. Reference numeral (50) indicates a terminal cover for housing and fixing the fixed contact (51). As shown in FIG. 5, fixed contact (51)
Has a fixed contact (51a) formed at one end thereof and is arranged at a position facing the movable contacts (4a) attached to both ends of the movable contactor (4) after being assembled.

In addition, a plug-connect type male terminal (hereinafter referred to as a tab) (51b) is formed at the other end of the fixed contact (51). Incidentally, (51e) is a hole or a recess for preventing the female terminal (connector) (not shown) from coming off when inserted.

A saw blade projection (51c) is formed on the lower portion of the tab (51b), and this is a slit (50) of the terminal cover (50).
It is inserted into a) and temporarily fixed in the direction opposite to the insertion,
The tab (51b) projects from the terminal cover (50).

Further, at the time of this insertion and assembly, the projecting piece (51d) provided in the intermediate portion of the fixed contact (51) also has the terminal cover (5d shown in FIG.
The posture is restricted by being inserted into the groove (50b) of (0). At this time, the pin (50c) of the terminal cover (50) shown in FIG. 1 is also inserted into the round hole (51f) of the fixed contact (51).

The combined body of the terminal cover (50) and the fixed contactor (51) thus assembled is inserted into the housing (1) in the directions of arrows E and G in FIG. 1 to be assembled. Terminal cover (50) shown by hatching in Fig. 5
The upper side surface (50d) of the terminal is in the groove (1a) of the housing (1) shown in FIGS. 3 and 7, and the upper surface (50e) of the tip of each pole of the terminal cover (50) is the housing (1). ) Recess (1
The guide is inserted in b).

Further, the stepped portion (50f) at the tip of the terminal cover (50) in FIG. 5 is also fitted into the corresponding recess (not shown) of the housing (1).

At the final stage of the insertion, the half cutout holes (50g) provided at the end of the terminal cover (50) engage with the engaging projections (1c) provided at both ends of the housing (1) on the power supply side and the load side. As a result, the vertical position of the terminal cover (50) in FIG. 1 is regulated by these.

Further, as shown in Fig. 1, the pin (50
c) is pushed up by the insertion guide surface (1d) of the housing (1) in the upward direction of FIG. 1 during the insertion process, and at the end of the insertion, the elasticity of the material of the terminal cover (50) restores the original shape. As shown in FIG. 1, the tip of the pin (50c) fits into the stop recess (1e) of the housing (1) to prevent the movement in the opposite direction to the insertion direction. The hole (50h) provided at the end of the terminal cover (50) and the holes (1f) provided at both ends of the housing (1) on the power supply side and the load side are provided.
Since the fixing screw (12) is fastened to the base (2) through the two holes, the movement of the terminal cover (50) in the vertical and horizontal directions in FIG. 1 is fixed.

During the process of inserting the terminal cover (50), the fixed contact (5
Tongue piece (51g) provided near the fixed contact (51a) of 1)
Is inserted in the groove (1g) provided in the barrier wall between the poles of the housing (1), and the vertical position of the fixed contact (51a) in FIG. 1 is the groove (1g) and the tongue ( It is configured so that it does not move more than the play of the thickness of 51 g).

Next, in FIG. 4 and FIG. 8, (10) shows an operating coil. The coil terminal (53a) is wound around the coil frame (53) around which the operating coil (10) is wound. ), And the coil terminal (52) is fitted and fixed in the groove (53b) in this portion by its spring force. One end (52a) of the coil terminal (52) has a terminal (10a) for the operation coil (10).
Is wound and then soldered, etc.
The other end forms a plug-in male terminal (tab) (52b).

The tab (52b) is inserted into the coil terminal slit (50J) provided in the terminal cover (50) to regulate the position in the vertical and horizontal directions in FIG. Further, in the vertical position of the coil terminal (52) in FIG. 4, the lower surface of the coil terminal (52) is located below the coil frame (53).
Of the terminal cover (50) is abutted against the coil terminal support portion (53a) of the terminal cover (50), and is regulated and fixed by abutting and pressing the upper surface of the coil terminal (52).

The closing and opening operations of the circuit as the electromagnetic contactor are exactly the same as those of the conventional example, and therefore a description thereof will be omitted. Here, the operations of connecting and disconnecting the plug-in terminal will be described.

The side surface (50d) of the terminal cover (50) and the groove (1a) of the housing (1), the top surface (50e) of each pole tip of the terminal cover (50) and the recess (1b) of the housing (1), and The terminal cover (50) is fixed to the housing (1) in the vertical direction in FIG. 1 by the engagement of the half cutout hole (50g) of the terminal cover (50) and the engaging protrusion (1c) of the housing (1). In addition, the pin (50
It is fixed by engaging c) with the stop recess (1e) of the housing (1) and tightening the fixing screw (12). Therefore, at the time of disconnecting the connection type female terminal (not shown) from the fixed contact (51), the connection, that is, the lower surface of the fixed contact (51) against the force in the direction of arrow A in FIG. Contacts the guide surface (1d) of the housing (1), and in the direction of arrow B, the upper surface of the fixed contact (51) is the lower surface (50) of the terminal cover (50).
a). At this time, since the terminal cover (50) is fixed to the housing (1) as described above, deformation and play can be prevented. Further, since it is also fixed against the pulling force in the direction of arrow C, there is no backlash or deformation.

Furthermore, regarding the breaking strength of the peripheral plastic parts during the above-mentioned operation, there is particular concern about the force in the directions of arrows B and C. For this, the material of the terminal cover (50) has elasticity such as thermoplastic resin. By using a plastic material, the breaking limit force can be increased by absorbing the energy of the force applied to the fixed contactor (51) in the same direction by the minute deformation of the terminal cover (50).

Also, a slight deformation of the terminal cover (50), the terminal cover (50)
Even when slight looseness or the like occurs between the fixed contact (51) and the fixed contact (51), the tongue piece (51g) of the fixed contact (51) is inserted into the groove (1g) of the housing (1), so that the fixed contact Since the vertical movement amount of (51a) in FIG. 1 is suppressed to be extremely small, there is no change in an important factor in the closing of the contact point indicated by the overtravel amount, and the risk of functional failure is eliminated.

Next, attachment / detachment of the female terminal (not shown) of the plug-in connection type to the coil terminal (52) will be described.

This case is almost the same as that of the fixed contact (51), but the force in the directions of arrows H, J, K in FIG.
It acts on 2). For force in the H direction, coil terminal (5
2) lower surface and coil frame (53) coil terminal support (53a)
With respect to the force in the J direction, the upper surface of the coil terminal (52) and the coil terminal supporting protrusion (50k) of the terminal cover (50) are in contact with each other. , The movement is fixed by abutting the inner periphery of the coil terminal slit (50J) of the terminal cover (50) with the tab (52b), preventing deformation of the coil terminal (52) and play and operation by them The disconnection of the connecting portion of the terminal (10a) of the coil (10) is prevented.

By the way, in the above embodiment, the recess (1
Although a) is provided and the terminal cover (50) is inserted into it,
The housing (1) may be provided with a recess and the terminal cover (50) may be provided with a recess for vertical fixing in FIG.

In the embodiment, the terminal cover (50) for three poles and the three fixed contacts (51) are integrated into the housing (1). It is also possible to increase the number of poles to three or more.

〔The invention's effect〕

As described above, according to the present invention, the fixed contactor and the plug-in connection type male terminal are integrally inserted into the slit of the terminal cover, and they are inserted and fixed in the housing. Rattling when attaching and detaching the female terminal to the male terminal,
The deformation and the like can be made extremely small, and an extremely inexpensive electromagnetic contactor can be obtained by reducing the number of parts and assembling method by insertion.

Further, since the pin of the terminal cover engages with the stop recess of the housing at the terminal cover insertion end position, the terminal cover is extremely firmly fixed in the direction of removal (the direction opposite to the insertion).

Further, since the groove is provided on the interelectrode wall of the housing and the tongue piece of the fixed contact is inserted into this groove, the vertical movement amount of the fixed contact is suppressed, which is an important factor for closing the contact. It is stable and reliable.

In addition, the insertion-type male terminal provided at one end of the coil terminal is inserted into and fixed to the coil terminal slit provided at one end of the terminal cover. It is possible to prevent problems such as disconnection of the coil terminal connecting portion and loss of the primary function.

[Brief description of drawings]

1 to 8 are views showing an electromagnetic contactor according to the present invention. FIG. 1 is a front sectional view, FIG. 2 is a plan view taken along the arrow D in FIG. 1, and FIG. 3 is FIG. No. 4, a side half sectional view taken along the arrow E of FIG.
2 is a sectional view taken along line F-F in FIG. 2, FIG. 5 is an exploded perspective view showing the assembly of the terminal cover and the fixed contact, FIG. 6 is a perspective view taken in the direction of arrow Z in FIG. 5, and FIG. 7 is a housing. 8 is an exploded perspective view showing the operation coil portion. Figures 9-
FIG. 11 is a view showing a conventional electromagnetic contactor, FIG. 9 is a front sectional view, FIG. 10 is a plan view, and FIG. 11 is an exploded perspective view showing an assembly of a fixed contact and a housing. In the figure, (1) is housing, (1a) is groove, (1b)
Is a recess, (1e) is a stop recess, (1g) is a groove, (50) is a terminal cover, (50c) is a pin, (50a) and (50J) are slits, (51) is a fixed contact, ( 51b) and (52b) are male terminals for plug-in connection, (51g) is a tongue piece, and (52) is a coil terminal. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (4)

[Claims] 1. An electromagnetic contactor having a male terminal for connection as a wiring terminal, wherein a metal plate having a contact portion at one end and a male terminal for connection connection formed at the other end is bent. Insert the fixed contactor into the terminal cover made of resin to make the male terminal of the fixed contact of the plug-in connection type protrude from the slit provided in the terminal cover, and also to the power supply side and the load side of the housing. An electromagnetic contactor in which the insertion assembly of the terminal cover and the fixed contact is fitted and assembled along the guide portion formed of the recess and the groove formed in the housing from respective directions. 2. When the insert assembly of the terminal cover and the fixed contact is fitted and assembled along a guide portion formed by a recess and a groove formed in the housing, the pin provided on the lower surface of the terminal cover is inserted at the end position of the fitting. The electromagnetic contactor according to claim 1, wherein the electromagnetic contactor engages with a stop recess provided in the housing. 3. A tongue piece provided in the vicinity of a contact portion of a fixed contact is inserted into a groove provided in an inter-electrode wall of a housing, and a tongue piece according to claim 1 or 2, wherein Electromagnetic contactor. 4. An electromagnetic contactor having male and female terminals as wiring terminals, wherein fixed contacts are inserted into a resin-molded terminal cover and assembled to form a combined body on each of a housing power source and load side. From the above, insert and connect along the guide portion formed by the recess or groove of the housing, and insert the insertion connection type male terminal provided at one end of the coil terminal into the coil terminal slit provided in the terminal cover. Characteristic electromagnetic contactor.