JP3360771B2 - 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 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 impossible 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]

According to the present invention, an adjustment terminal for adjusting the height of a connection surface is connected to its auxiliary contact terminal using a general-purpose electromagnetic contactor, and the connection surface of the adjustment terminal is mainly used. The above object is achieved by aligning the terminals with the same height as the connection surface. The electromagnetic contactor, which incorporates the auxiliary contact terminal to the side surface portion of the body frame, in addition to the auxiliary contact, or the like which is mounted the auxiliary contact unit on the side surface of the main body frame instead. Normal,
In an electromagnetic contactor with the auxiliary contact terminal built into the main frame or the auxiliary contact unit mounted on the side of the main frame, the auxiliary contact terminal is located at a position where the connection surface is lower than the main terminal.
is there.

Therefore, in an electromagnetic contactor in which the auxiliary contact terminal is built in the side surface of the main body frame, the terminal portion and the connection portion are formed at both ends at right angles in accordance with the height difference of the connection surface between the main terminal and the auxiliary contact terminal. An adjustment terminal made of a rectangular conductor bent and formed is provided, and the connection portion of the adjustment terminal is connected to the connection surface of the auxiliary contact terminal so as to overlap the connection portion, and the connection surface of the terminal portion of the adjustment terminal is connected to the connection surface of the main terminal. When aligned at the same height as the
Both the recess for accommodating the terminal portion of the adjustment terminal and the end
Terminal cover having a slit that fits with a neck portion following the child portion
Into the adjustment terminal from the side, and
Is covered except for the connection surface of the terminal part, and this terminal cover is
Lock to the frame of the electromagnetic contactor body via the hook
(Claim 1).

In an electromagnetic contactor in which an auxiliary contact unit is mounted on a side surface of a main body frame and an auxiliary contact terminal arranged on the auxiliary contact unit has a connection surface lower than that of the main terminal, the auxiliary terminal is connected to the main terminal. An adjusting terminal made of a flat conductor in which a terminal portion and a connecting portion are bent at right angles is provided at both ends in accordance with a difference in height of a connecting surface of the contact terminal, and the connecting portion of the adjusting terminal is connected to a connecting surface of the auxiliary contact terminal. And the connection surface of the terminal portion of the adjustment terminal is aligned with the same height as the connection surface of the main terminal.
The recess accommodating the terminal part and the neck part following the terminal part are fitted.
A terminal cover having a slit and
And adjust the adjustment terminal with the connection surface of the terminal portion.
Except to cover this terminal cover via the auxiliary contact
Shall be locked to the case of the unit.
2).

In any of the above-mentioned electromagnetic contactors, if the movable contact of the auxiliary contact is removed and the auxiliary contact terminal and the coil terminal are connected by a conductor, the connection surface of the coil terminal is also flush with the main terminal. Is possible (claim 3).

[0009]

The auxiliary contact of a general-purpose electromagnetic contactor is built into the electromagnetic contactor main body, or is mounted on the side or head of the electromagnetic contactor main body as a separate auxiliary contact unit. Is different in height from the connection surface of the main terminal, and cannot be connected to the main terminal and the printed board as it is. Therefore, according to the present invention, the adjustment terminal is separately connected to the auxiliary contact terminal, and the connection surface thereof is arranged at the same height as the connection surface of the main terminal. Thereby, the connection surface of the main terminal and the auxiliary contact terminal can be made the same plane.

In this case, if the movable contact is removed from the auxiliary contact support, the auxiliary contact is invalidated, and the auxiliary contact terminal corresponding to the removed movable contact and the coil terminal are connected by a conductor. The connection surface can be made flush with the connection surface of the main terminal via the adjustment terminal. Since the auxiliary contact of the general-purpose electromagnetic contactor is generally provided with a plurality of poles, there is usually no problem even if one of the poles is invalid for the coil terminal.

[0011]

EXAMPLES Hereinafter, the embodiment of the present invention will be described with reference to FIGS. 1 to 6. Embodiment 1 FIGS. 1 to 3 show an embodiment of an electromagnetic contactor in which an auxiliary contact is built in a main body. FIG. 1 is an exploded perspective view, FIG. FIG. 3 is a front view of a state where the electromagnetic contactor is mounted on the printed board. First,
In FIG. 1, an electromagnetic contactor 1 has a well-known structure, and is fixed to a frame 2 divided into upper and lower parts by a movable contact held by a contact support interlocked with a movable iron core of an operation electromagnet and a frame 2. An opening / closing section comprising a fixed contact is accommodated. The main terminals 3 on the power supply side (front side in the figure) and the load side are arranged on the upper part of the frame 2 so as to be divided into front and rear.
Further, a coil terminal 4 is arranged at a lower portion on the power supply side.

Further, auxiliary contact terminals 5 for two poles are arranged on both left and right sides of the frame 2, respectively. The auxiliary contact terminals 5 on each side have a two-stage arrangement in which the front and rear inside and outside are paired, and the inside is higher than the outside. On each side, if the auxiliary contact having the auxiliary contact terminal 5 inside is an a contact (normally open contact) and the external auxiliary contact is a b contact (normally closed contact), the configuration of the auxiliary contact in that case is a The contact has two poles and the b contact has two poles (2a2
b). In such an electromagnetic contactor, the connection surface (upper surface in the figure) of the auxiliary contact terminal 5 and the coil terminal 4 is at a position lower than the main terminal 3 as shown in the figure, and the main terminal 3 and the auxiliary contact terminal 5, and Coil terminal 4
Cannot be integrally connected to the printed board.

Therefore, the adjustment terminals 6 and 7 are connected to the auxiliary contact terminal 5. The adjusting terminals 6 and 7 are made of a rectangular conductor having the same width as that of the auxiliary contact terminal 5, and the terminal portions 6a and 7a and the connecting portions 6b and 7b are respectively formed at right and left sides in accordance with the height difference from the main terminal 3 at both ends. It is bent. The terminal portions 6a and 7a are provided with screw holes 8, and the connection portions 6b and 7b are provided with fastening holes 9. The pair of front and rear adjustment terminals 6 are for the inside, and the adjustment terminal 7 is also for the outside. The height of the inside adjustment terminal 6 is lower than that of the outside adjustment terminal 7 by the step of the auxiliary contact terminal 5. These adjustment terminals 6 and 7 are connected to the electromagnetic contactor 1 as shown by the dashed arrows.
And the connection portions 6b and 7b are connected to the auxiliary contact terminal 5 .
A screw 10 that is superimposed on the surface and passes through the tightening hole 9 is screwed into the screw hole of the auxiliary contact terminal 5 and tightened.
In this state, the connection surfaces of the terminal portions 6a and 7a are at the same height as the connection surface of the main terminal 3.

A terminal cover 11 is mounted on the electromagnetic contactor 1 to which the adjustment terminals 6 and 7 are connected. The terminal cover 11 is formed by a molding resin into a shape shown in the figure, and a concave portion 11 a for accommodating the terminal portions 6 a and 7 a of the adjustment terminals 6 and 7 is provided on an upper portion.
Subsequent slits 11b that fit with the neck and cutouts 11c that escape the protrusions 2a on the side surfaces of the frame 2 are formed. A pair of hooks 11d are integrally formed on the inner front surface to engage with the edges of the two square holes 12 on the side surface of the electromagnetic contactor frame 2 as shown by the dashed arrow. The square hole 12 of the frame 2 is originally provided in the frame 2 in order to further attach an auxiliary contact unit of the type shown in a second embodiment described later. The terminal cover 11 is pushed into the electromagnetic contactor 1 from the side, and the hook 11
d, and is fitted to the adjustment terminals 6 and 7 through the slits 11b. The terminal cover 11 covers the adjustment terminals 6 and 7 except for the connection surface (the upper surface in FIG. 1) of the terminal portions 6a and 7a, and the concave portion 11a and the slit 11b grip the upper ends of the adjustment terminals 6 and 7, and I am trying to fix it.

On the other hand, a printed board 13 shown in FIG. 2 is provided with a notch 14 for escaping the protruding portion 2a of the frame 2 and a comb-blade-shaped window hole 15 for escaping the head 2b and the inter-space wall 2c. Main circuit conductor pattern 16 and auxiliary contact circuit conductor pattern 17 in accordance with main terminal 3 and adjustment terminals 6 and 7.
Are formed, and a tightening hole 18 is formed in each of the terminal portions. As shown in FIG. 3, 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 6 are inserted through the fastening holes 18. The connection is made by screwing the main terminal screw 20 and the auxiliary terminal screw 21 into the screw holes 8 of 7. When the auxiliary terminal screw 21 is tightened, the terminal cover 11 fitted to the necks of the adjustment terminals 6 and 7 acts to prevent rotation.

Embodiment 2 FIGS. 4 to 6 show an embodiment of an electromagnetic contactor in which an auxiliary contact unit is mounted on a side surface of a frame.
5 is an exploded perspective view, FIG. 5 is a cross-sectional view along the line VV in FIG. 4, and FIG. 6 is a perspective view of the terminal cover. The auxiliary contact unit 22 shown in FIGS. 4 and 5 has movable contacts 25 and 26 held together with a contact spring 27 in two upper and lower window holes of an auxiliary contact support 24 slidably inserted vertically into a case 23. A pair of front and rear auxiliary contact terminals 28 and 29 integral with the fixed contact are fixed to the case 23 so as to face the movable contacts 25 and 26. In addition,
The contact configuration of the illustrated auxiliary contact unit 22 is 1a1b. In the detached state of FIG. 5, the upper movable contact 25 is separated from the fixed contact, and the lower movable contact 26 is in contact with the fixed contact. In the mounting state, the auxiliary contact support 24 is lifted upward, and the upper part becomes the b contact and the lower part becomes the a contact.

The auxiliary contact unit 22 is attached to the electromagnetic contactor 1 as shown by a chain line arrow via a hook 23a formed integrally with the case 23 corresponding to the concave portion 2d formed at the front and rear of the frame 2, and at the same time, The connection protrusion 24a of the contact support 24 is inserted into the connection hole 30 of the main contact support in the electromagnetic contactor 1 and connected. In this case, too, the adjusting terminals 31 and 32 are tightened with the screw 10 and the terminal cover 33 is attached in order to make the connection surface of the auxiliary contact terminals 28 and 29 the same height as the main terminal 3. Adjustment terminal 31,
Although the configurations of the terminal cover 33 and the terminal cover 33 are the same as those in FIG. 1 and description thereof is omitted, in this case, the hooks 33 a at both ends are attached to both ends 23 of the case 23.
b (FIG. 4). The auxiliary contact unit 22 is mounted on both left and right sides of the electromagnetic contactor 1. The configuration of the printed board in this case is the same as that of the printed board 13 in FIG.

In each of the above-described embodiments, when the connection surface of the coil terminal 4 of the electromagnetic contactor 1 is also desired to be flush with the main terminal 3, one movable contact is removed from the auxiliary contact support and the movable contact is supported. The auxiliary contact terminal and the coil terminal are connected via a lead wire or a plate conductor. For example, in the case of the second embodiment, the movable contact 26 below the auxiliary contact unit 22 in FIG. 6 is removed to invalidate the a contact, and the auxiliary contact terminal 29 and the coil terminal 4 are connected via a lead wire. As a result, the outer adjustment terminal 32 becomes a new coil terminal, and its connection surface is the same as the main terminal 3.

[0019]

As described above, according to the present invention, the adjusting terminal is connected to the auxiliary contact terminal, and the connecting surface is made to be flush with the connecting surface of the main terminal. As a result, a printed circuit board-mounted electromagnetic contactor having an auxiliary contact can be easily obtained, and a large-capacity electromagnetic contactor can be applied to printed circuit board wiring at low cost. In this case, if the movable contact of the auxiliary contact is removed and the auxiliary contact terminal and the coil terminal are connected by a conductor, the coil terminal can be connected to the printed board via the adjustment terminal.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing the printed board from the back side.

FIG. 3 is a front view showing a state where the electromagnetic contactor of FIG. 1 is mounted on the printed board of FIG. 2;

FIG. 4 is an exploded perspective view showing Embodiment 2 of the present invention.

5 is a cross-sectional view of the auxiliary contact unit in FIG. 4 taken along line VV.

FIG. 6 is a perspective view of a terminal cover of the auxiliary contact unit in FIG.

[Explanation of symbols]

 Reference Signs List 1 electromagnetic contactor 2 frame 3 main terminal 4 coil terminal 5 auxiliary contact terminal 6 adjustment terminal 7 adjustment terminal 11 terminal cover 13 printed board 22 auxiliary contact unit 28 auxiliary contact terminal 29 auxiliary contact terminal 31 adjustment terminal 32 adjustment terminal 34 auxiliary contact unit 37 Auxiliary contact terminal 39 Adjustment terminal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-124924 (JP, A) JP-A-4-220921 (JP, A) JP-A-5-128953 (JP, A) JP-A-4-124 196024 (JP, A) Japanese Utility Model 58-70651 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 50/02-50/04 H01H 50/14 H01H 50/54

Claims (3)

(57) [Claims] 1. An electromagnetic contactor having an auxiliary contact terminal disposed on a side surface of a frame of an electromagnetic contactor main body, wherein the auxiliary contact terminal has a connection surface lower than the main terminal.
And auxiliary contact terminals at both ends according to the height difference of the connection surface.
From the rectangular conductor with the sub-portion and the connecting portion bent at right angles
Is provided, and the connection portion of the adjustment terminal is
Connect to the connection surface of the auxiliary contact terminal,
Make the connection surface of the terminal part the same height as the connection surface of the main terminal
And a recess for accommodating the terminal portion of the adjustment terminal and a front portion.
Terminal having a slit fitted with a neck portion following the terminal portion
Insert the cover into the adjustment terminal from the side,
Cover the terminal except for the connection surface of the terminal section, and
To the frame of the electromagnetic contactor body via the hook.
An electromagnetic contactor characterized by having 2. A supplementary part is provided on a side of the frame of the electromagnetic contactor body.
Auxiliary contact unit is installed and arranged on this auxiliary contact unit.
The auxiliary contact terminal is located at a position where the connection surface is lower than the main terminal.
In an electromagnetic contactor, the height of the connection surface between the main terminal and the auxiliary contact terminal is adjusted according to
Terminals and connecting parts bent at right angles at both ends.
An adjustment terminal made of a square conductor is provided, and the adjustment terminal is connected to the adjustment terminal.
Connecting the connection part to the connection surface of the auxiliary contact terminal,
The connection surface of the terminal part of the adjustment terminal is the same as the connection surface of the main terminal
Height, and accommodate the terminal part of the adjustment terminal.
Recess and a slit that fits into the neck following the terminal.
Having a terminal cover fitted to the adjustment terminal from the side
In, cover the adjustment terminal except for the connection surface of the terminal portion,
Connect this terminal cover to the auxiliary contact unit
An electromagnetic contactor characterized by being locked to a base. 3. Remove the movable contact from the auxiliary contact support, according to claim 1 or claim, characterized in that connected with the auxiliary contact terminal and the conductor of the coil terminal corresponding to the movable contact
2. The electromagnetic contactor according to 2 .