JP3266230B2 - Electromagnetic contactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor, and more particularly to an improvement of an auxiliary contact terminal and a coil terminal for mounting a general-purpose electromagnetic contactor on a printed board.

[0002]

2. Description of the Related Art An electromagnetic contactor for mounting a printed board is disclosed in Japanese Utility Model Publication No. Hei.
The one described in Japanese Patent Publication No. 32 is known. In each of these electromagnetic contactors, the main terminal and the coil terminal are drawn out to the top surface of the head of the electromagnetic contactor, and their connection surfaces are arranged in the same plane.

[0003]

On the other hand, with the increase in the current carrying capacity of the printed circuit board itself, the electromagnetic contactor mounted on the printed circuit board, which had a rated current of 30 A or less in the past, has been reduced to 50 to 50 A.
60A, and even 100A class is needed. However, large electromagnetic contactors for mounting on printed boards are less demanded than small ones, so the configuration of small electromagnetic contactors dedicated to printed boards as described in the above publication is applied to large ones. It is difficult to stock in stock.

Further, the electromagnetic contactor often needs an auxiliary contact which works in conjunction with the main contact for linking and interlocking with other control circuit components. Due to the space of the head of the electromagnetic contactor, it is difficult to arrange the auxiliary contact terminals together with the main terminals and the coil terminals while securing a sufficient insulation distance. SUMMARY OF THE INVENTION It is an object of the present invention to provide an electromagnetic contactor for mounting a printed board, which has an auxiliary contact and can be manufactured at a low cost even in a small quantity.

[0005]

SUMMARY OF THE INVENTION The present invention achieves the above object by using a general-purpose electromagnetic contactor and mounting a newly provided terminal unit on the electromagnetic contactor. That is, the present invention provides a main terminal, a coil terminal, and an auxiliary contact terminal.
In the electromagnetic contactor where the height of the connecting surface of the child is different from each other,
A terminal unit is provided in which a plurality of adjustment terminals corresponding to the coil terminals and the auxiliary contact terminals are arranged with their connection surfaces aligned in the same plane, and the connection surface of the adjustment terminals is connected to the main terminal connection surface. together when attached to the electromagnetic contactor main body to be in the same plane, so as to connect the adjustment terminal and the auxiliary contact terminals and coil terminals via the relay conductor and
Then, press the adjustment terminal into the case of the terminal unit.
Groove, and the relay terminal in which the adjustment terminal is joined in advance.
Body to said coil terminal and auxiliary contact terminal, and
Attach the terminal unit case to the electromagnetic contactor body
After that, the adjusting terminal is press-fitted and supported in the groove of the case.
Shall be used.

The electromagnetic contactor has an auxiliary contact terminal built in the side surface of the main body frame, and in addition to the auxiliary contact,
Alternatively, an auxiliary contact unit may be mounted on the side surface of the main body frame, or an auxiliary contact unit may be mounted on the head of the main body frame. Normally, in an electromagnetic contactor in which the auxiliary contact terminal is built into the body frame or the auxiliary contact unit is mounted on the side of the body frame, the auxiliary contact terminal has a connection surface lower than the main terminal, and the auxiliary contact unit is In the electromagnetic contactor mounted on the head of the main frame, the auxiliary contact terminal has a connection surface higher than the main terminal. Further, the coil terminals are generally provided on the power supply side of the main body frame, or are separately provided on the power supply side and the load side, and the connection surface is located lower than the main terminals.

[0007] In an electromagnetic contactor in which the auxiliary contact terminal is built into the side surface of the main body frame, it is preferable that the terminal unit is locked to the side surface of the main body frame of the electromagnetic contactor via a hook. In an electromagnetic contactor in which the auxiliary contact unit is mounted on the side surface of the main body frame, the terminal unit is preferably locked to the case of the auxiliary contact unit via a hook. Further, in an electromagnetic contactor in which the auxiliary contact unit is mounted on the head of the main body frame of the electromagnetic contactor, it is preferable that the terminal unit be locked to a side surface of the main body frame of the electromagnetic contactor via a hook.

[0008]

According to the present invention, a terminal unit having a plurality of adjustment terminals having connection surfaces arranged in the same plane is mounted on the electromagnetic contactor body such that the connection surface of the adjustment terminals is at the same height as the connection surface of the main terminal. Attach, and connect the adjustment terminal, the auxiliary contact terminal, and the coil terminal with the relay conductor. Thereby, the connection surface of the coil terminal and the auxiliary contact terminal is made flush with the main terminal through the adjustment terminal.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the following embodiments, the same reference numerals are used for parts corresponding to each other. Embodiment 1 FIGS. 1 to 4 show an embodiment of an electromagnetic contactor having a built-in auxiliary contact in a main body. FIG. 1 is a perspective view of an electromagnetic contactor.
FIG. 2 is an exploded perspective view showing a mounting configuration of the terminal unit, and FIG.
FIG. 4 is a perspective view of a main part showing a back surface side of a printed board on which the electromagnetic contactor is mounted, and FIG. 4 is a front view showing a state where the electromagnetic contactor is mounted on the printed board. First, in FIGS. 1 and 2, an electromagnetic contactor 1 has a well-known configuration, and includes a movable contact held in a contact support interlocked with a movable iron core of an operation electromagnet in a main body frame 2 divided vertically. An opening / closing section including fixed contacts fixed to the main body frame 2 is housed. A main terminal 3 on the power supply side (front side in the figure) and a load side are arranged separately at the upper part of the main body frame 2, and a coil terminal 4 is arranged on the lower part on the power supply side.

Further, on both right and left sides of the main body frame 2,
Auxiliary contact terminals 5 (FIG. 2) for two poles are arranged. The auxiliary contact terminals 5 on each side have a two-stage arrangement in which the front and rear inner and outer sides are paired, and the inner side is higher than the outer side. On each side, if the auxiliary contact with the auxiliary contact terminal 5 inside is an a contact (normally open contact), and the auxiliary contact outside the auxiliary contact terminal 5 is a b contact (normally closed contact),
In this case, the configuration of the auxiliary contact is such that the a contact has two poles and the b contact has two poles.
It is the pole (2a2b). In such an electromagnetic contactor, the connection surface (upper surface in the figure) of the coil terminal 4 and the auxiliary contact terminal 5 is located at a position lower than the main terminal 3 as shown, and the main terminal 3 and the coil terminal 4 and the auxiliary terminal The contact terminal 5 cannot be integrally connected to the printed board.

Then, the terminal unit 6 is mounted as shown in the figure. The terminal unit 6 is configured by arranging adjustment terminals 7 in each section of an insulating case separated by an inter-phase barrier 6a. The adjustment terminals 7 are coil terminals 4 (two) and auxiliary contact terminals 5 (four on one side). ) Are provided in accordance with the total number. Here, the adjustment terminal 7 includes a square terminal portion 7a and a rod-shaped connection portion 7b bent at a right angle from the terminal portion 7a.
A screw hole 8 is provided in the terminal portion 7a. A block-shaped terminal supporting portion 6b is integrally formed in the case so that the upper surface is located in the same plane for each section, and the inside of the interphase barrier 6a on both sides thereof is aligned with the upper surface of the terminal supporting portion 6b. The grooves 6c are formed so as to face each other. The adjusting terminal 7 is supported on the terminal supporting portion 6b after the left and right ends thereof are pressed into the grooves 6c in the direction indicated by the arrow in FIG. 1, and the connection surface on the upper surface of the terminal portion 7a is in the same plane. It is fixed as shown so as to be aligned.

As shown in FIG. 2, a pair of hooks 6d and 6e are integrally formed on the rear surface of the case of the terminal unit 6, as shown in FIG. The hook 6d is formed in accordance with a pair of square holes 9 provided on the side surface of the main body frame 2 for attaching an auxiliary contact unit (not shown) to the auxiliary contact terminal 5 and attaching the same to the electromagnetic contactor 1. Is formed in accordance with the shoulder of a barrier 2 a provided on the main body frame 2 to cover the side surface of the auxiliary contact terminal 5. Then, the terminal unit 6 is pushed in from the side of the main body frame 2,
The hooks 6d and 6e are elastically engaged with the corresponding square holes 9 and the shoulders of the barrier 2d and are locked to the electromagnetic contactor 1 as shown by the chain arrows in FIG. The mounting position of the terminal unit 6 is set such that the connection surface of the adjustment terminal 7 is in the same plane as the connection surface of the main terminal 3 when mounted on the electromagnetic contactor 1.

As shown in FIG. 1, the adjusting terminal 7, the coil terminal 4 and the auxiliary contact terminal 5 are connected by a relay conductor, in the embodiment shown, a flexible electric wire 10. That is, electric wire 1
0 has one end joined to the connection portion 7b of the adjustment terminal 7 by spot welding, and the other end has terminal screws 11 and 12 (FIG. 2).
Are connected to the coil terminal 4 and the auxiliary contact terminal 5. The first and second adjusting terminals 7 are connected to the coil terminal 4 from the right in FIG. 1, the third and sixth are connected to the lower auxiliary contact terminal 5, and the fourth and fifth are connected to the upper auxiliary contact terminal. 5 respectively. The wiring of the electric wire 10 is performed by connecting the electric wire 10 to which the adjusting terminal 7 has been joined in advance to the terminals 4 and 5 before attaching the adjusting terminal 7 to the case of the terminal unit 6, and then connecting the case of the terminal unit 6 to the electromagnetic contactor 1. Mounting is performed, and then the adjustment terminal 7 is press-fitted into the case. Although FIG. 1 shows only the terminal unit 6 on the left side surface of the electromagnetic contactor 1, the terminal unit 6 is also mounted on the opposite side surface. However, on the opposite side, wiring is performed only between the auxiliary contact terminal 5.

On the other hand, the printed circuit board 13 shown in FIG. 3 is provided with a main terminal 3 and a window hole 14 for escaping the interphase barrier 2c and the interphase barrier 6a of the terminal unit 6 from the head 2b of the main body frame 2. A main circuit conductor pattern 15, an auxiliary contact circuit conductor pattern 16, and a coil excitation circuit conductor pattern 17 are formed in accordance with the adjustment terminal 7, and a tightening hole 18 is formed in each of these terminal portions. As shown in FIG. 4, the printed board 13 is fitted from above into the electromagnetic contactor 1 attached to a mounting plate 19 such as a switchboard, and the screw holes of the main terminal 3 and the adjustment terminals 7 are tightened through fastening holes 18. The connection is made by screwing the terminal screws 20 and 21 into the screw holes 8.

Embodiment 2 FIGS. 5 and 6 show an embodiment of an electromagnetic contactor in which an auxiliary contact unit is mounted on a side surface of a main body frame. FIG. 5 is a perspective view of the electromagnetic contactor, and FIG. FIG. 3 is an exploded perspective view showing a mounting configuration of the unit. As shown in FIG.
An auxiliary contact unit 22 is attached to a side surface of the main body frame 2 of the electromagnetic contactor 1 by locking via a hook (not shown). Although the illustration of the internal structure is omitted, the auxiliary contact unit 22 has two sets of upper and lower movable contacts held together with a contact spring on an auxiliary contact support slidably inserted into the case up and down. A pair of auxiliary contact terminals 5 are fixed to the case in two stages, upper and lower. A pair of left and right square holes 23 are provided on the side surface of the case of the auxiliary contact unit 22. The positional relationship between the coil terminal 4 and the auxiliary contact terminal 5 with respect to the main terminal 3 in the electromagnetic contactor 1 of FIG. 6 in which the auxiliary contact unit 22 is mounted is the same as in the case of the first embodiment. It is in.

Therefore, as shown in FIG. 5, the terminal unit 6 is mounted on the side surface of the auxiliary contact unit 22. The structure of the terminal unit 6 is substantially the same as that of the first embodiment. The hook 6d is engaged with the square hole 23, and the hook 6e is engaged with both shoulders of the barrier 22a of the case of the auxiliary contact unit 22. To the auxiliary contact unit 22. In this state, the connection surface of the adjustment terminal 7 is the same as the connection surface of the main terminal 3, and the adjustment terminal 7 is connected to the coil terminal 4 and the auxiliary contact terminal 5 via the electric wire 10. The auxiliary contact unit 22 is mounted on the left and right sides of the electromagnetic contactor 1,
Accordingly, the terminal units 6 are also mounted on the left and right sides.
The configuration of the printed board is also substantially the same as that of the first embodiment.

Embodiment 3 FIGS. 7 and 8 show an embodiment of an electromagnetic contactor in which an auxiliary contact unit is mounted on the head of a main body frame.
FIG. 7 is a perspective view of the electromagnetic contactor, and FIG. 8 is an exploded perspective view showing a mounting configuration of the terminal unit. The electromagnetic contactor 1 according to the third embodiment has the same configuration as that according to the second embodiment, but the auxiliary contact unit 22 utilizes the hook 2d (see FIG. It is attached to the head of the container 1. The auxiliary contact unit 22 has four poles. Although the internal configuration is not shown, the movable contact is held by an auxiliary contact support inserted slidably up and down in the case. The auxiliary contact terminal 5 is fixed to the case for each pole. In this case, the connection surface of the auxiliary contact terminal 5 is the main terminal 3
Higher than the position.

Therefore, the main body frame 2 is attached to the electromagnetic contactor 1.
The terminal unit 6 is mounted on the side surface of the terminal as shown in FIG. The terminal unit 6 has substantially the same configuration as that of the first embodiment, and in this case, only a pair of hooks 6d are provided.
Are engaged with the front and rear concave portions 2 e (FIG. 8) of the main body frame 2 and are locked. At this time, the pair of square projections 6f of the terminal unit 6 are fitted into the square holes 24 of the main body frame 2 and positioned. The recess 2e and the square hole 24 are provided on the side surface of the main body frame 2 for mounting the auxiliary contact unit 22 (see FIG. 6). And also in this case, the adjustment terminal 7 is connected to the coil terminal 4 and the auxiliary contact terminal 5 via the electric wire 10, and the connection surface of the coil terminal 4 and the auxiliary contact terminal 5 is the same as the main terminal through the adjustment terminal 7. . In each of Examples 1 to 3, the relay conductor 10 was used.
Although a flexible electric wire was used in the above, it is of course possible to use a rigid conductor by bending it into a required shape.

[0019]

As described above, according to the present invention, a terminal unit having a plurality of adjustment terminals is mounted on an electromagnetic contactor such that a connection surface thereof is flush with a connection surface of a main terminal.
By connecting the adjustment terminal to the coil terminal and the auxiliary contact terminal via a relay conductor, the connection surfaces of the coil terminal and the auxiliary contact terminal are aligned at the same height as the main terminal through the adjustment terminal. Since a magnetic contactor for mounting a printed board can be easily obtained by using the same, a large-capacity electromagnetic contactor can be inexpensively adapted to printed wiring.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electromagnetic contactor showing Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view showing a mounting configuration of a terminal unit in the electromagnetic contactor of FIG.

FIG. 3 is a perspective view showing a back side of a printed board on which the electromagnetic contactor of FIG. 1 is mounted.

FIG. 4 is a front view showing a state where the electromagnetic contactor of FIG. 1 is mounted on the printed board of FIG. 3;

FIG. 5 is a perspective view of an electromagnetic contactor showing Embodiment 2 of the present invention.

FIG. 6 is an exploded perspective view showing a mounting configuration of a terminal unit in the electromagnetic contactor of FIG.

FIG. 7 is a perspective view of an electromagnetic contactor showing Embodiment 3 of the present invention.

8 is an exploded perspective view showing a mounting configuration of a terminal unit in the electromagnetic contactor of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic contactor 2 Main body frame 3 Main terminal 4 Coil terminal 5 Auxiliary contact terminal 6 Terminal unit 7 Adjustment terminal 10 Relay conductor 22 Auxiliary contact unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-124924 (JP, A) JP-A-5-128953 (JP, A) JP-A-4-196024 (JP, A) 27248 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 45/00-51/36

Claims (1)

(57) [Claims] 1. An electromagnetic contactor in which connection heights of a main terminal, a coil terminal, and an auxiliary contact terminal are different from each other, wherein a plurality of adjustment terminals corresponding to the coil terminal and the auxiliary contact terminal have the same connection surface. A terminal unit arranged in a plane is provided. The terminal unit is mounted on the main body of the electromagnetic contactor such that the connection surface of the adjustment terminal is flush with the connection surface of the main terminal. Terminals and coil terminals should be connected via relay conductors.
Then, press the adjustment terminal into the case of the terminal unit.
Groove, and the relay terminal in which the adjustment terminal is joined in advance.
Body to said coil terminal and auxiliary contact terminal, and
Attach the terminal unit case to the electromagnetic contactor body
After that, the adjusting terminal is press-fitted and supported in the groove of the case.
Electromagnetic contactor, characterized in that the the like.