JPH017960Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to electromagnetic devices such as electromagnetic relays.

An example of a conventional electromagnetic relay is shown in FIGS. 1 to 3. This electromagnetic relay has body 1,
A magnetic circuit is formed by a fixed iron core 2 fixed in the body 1, an electromagnetic coil 3 housed in the body 1, and the fixed iron core 2 inserted into the shaft hole 3a of the electromagnetic coil 3 so as to be movable back and forth. The movable iron core 4 and a return element disposed on the upper end surface of the coil frame 5 of the electromagnetic coil 3 to elastically support the movable iron core 4 on the coil frame 5 and to form a solenoid together with the fixed iron core 2, the electromagnetic coil 3, and the movable iron core 4. springs 6', 6', a movable frame (not shown) provided on the movable core 4, a frame 6 fixed to the upper part of the body 1 to hide the movable core 4, and a frame 6 fixed to the frame 6 to cover the movable core 4; It is equipped with a fixed contact (not shown) that is turned on and off by a movable contact (not shown) provided on the movable frame and a fixed contact (not shown) that is turned on and off by moving the movable iron core 4 forward and backward. , a fixed terminal plate 7 having a U-shaped cross section fitted onto this body 1, a terminal screw 9 screwed into a screw hole 8 formed in a terminal piece 7a of this fixed terminal plate 7, and a fixed terminal inserted into this terminal screw 9. A pair of coil external terminals 11, 11 each consisting of each member of a washer 10, which is connected by clamping the electric wire with the terminal piece 7a of the plate 7.
3A and 3A, respectively, and conductor tongue pieces 12, 12 made of conductive spring material are attached to the connection pieces 7b of the fixed terminal plates 7, 7 facing inside the body, respectively.
As shown in B, each of the electromagnetic coils 3 is fixed in a vertical position and extends downward, while the coil frame 5 around which the electromagnetic coil 3 is wound is located at a position facing each of the conductor tongues 12, 12. The electromagnetic coil 3 and the coil external terminal 11 are fixed by fixing the coil outlet terminals 13, 13 to which the ends of the coil outlet terminals 13 and 13 are connected, and by bringing the lower end of the conductor tongue piece 12 into elastic contact with the coil outlet terminal 13.
We are trying to connect with.

In Figures 1 and 2, 14... and 1
5 are external terminals connected to the movable contact and the fixed contact, respectively. The frame 6 is fixed to the body 1 through screw insertion holes 6a and 6 of the frame 6.
Screw hole 1 formed in the upper end surface of body 1 through a
Screws 16, 16 are screwed onto a, 1a and tightened and fixed.

However, in this electromagnetic relay, the coil external terminal 11 and the electromagnetic coil 3 are connected to each other by a long strip-shaped conductor tongue piece fixed to the connecting piece 7b of the fixed terminal plate 7.
2 to the coil outlet terminal 13 of the coil frame 5.
Since the method is carried out in elastic contact with the material, it has the following disadvantages.

(1) The conductor tongue piece 12 is connected to the connecting piece 7b of the fixed terminal plate 7.
It is simply fixed by caulking, etc.
Due to the drag force that the lower end of the coil frame 5 that comes into elastic contact with the coil outlet terminal 13 receives from the coil outlet terminal 13, the portion of the fixed terminal plate 7 fixed to the connection piece 7b tends to come off.

(2) The coil external terminal 11 has a structure in which the electric wire is clamped and connected between the terminal piece 7a of the fixed terminal plate 7 and the washer 10. Therefore, the fixed terminal plate 7 is made of copper or copper alloy to ensure current carrying performance. However, since these materials have poor strength, the screw holes 8 formed in the terminal pieces 7a of the fixed terminal board 7 may have strength variations or insufficient strength.

Therefore, the purpose of this invention is to provide an electromagnetic device that can increase the tightening strength of a terminal screw, ensure current carrying performance, and increase the elastic contact force of a conductive spring to a coil lead terminal. That's true.

An embodiment of this invention is shown in FIGS. 4A and 4B. That is, this electromagnetic device includes a coil frame 5 provided with a coil outlet terminal 13 (Figure 2), a case (Figure 2) consisting of a body 1 and a frame 6 that house the coil frame 5, and a case (Figure 2) that is attached to the case. A fixed terminal plate 7 has a terminal piece 7a which is bent to form a screw hole 8, and a connecting piece 7b which is bent to form a caulking protrusion 19 on the side of the terminal piece 7a, and the terminal piece 7a and the connecting piece 7b. A pair of overlapping pieces 12'a,
At 12'b, a screw insertion hole 17 which is approximately L-shaped and aligned with the screw hole 8 is formed, and a caulking projection 19 is formed.
The conductive spring 1 forms a crimping hole 18 to be crimped, and the side surface of the tip of the piece 12'b having the crimping hole 18 is in elastic contact with the coil outlet terminal 13.
2', and a terminal screw 9 (FIG. 2) screwed into the screw hole 8 through the screw insertion hole 17.

The fixed terminal plate 7 is made of iron as an example, and
The shape is similar to that shown in FIG.

The other configurations are the same as those of the conventional example.

With this configuration, the following effects can be obtained.

(1) The conductive spring 12' has a connection structure in which its piece 12'b is fixed to the connecting piece 7b of the fixed terminal plate 7, and its piece 12'a overlaps the terminal piece 7a of the fixed terminal plate 7. Therefore, due to the wire connection process at the coil external terminal 11, the piece 12'a
is pressed against the fixed terminal plate 7, and the strength of fixing the coil to the external terminal 11 can be greatly improved.

(2) Since the lower surface side where the electric wire is clamped with the washer 10 can be covered with the piece 12'a of the conductive spring 12', the fixed terminal plate 7 of the coil external terminal 11 is made of copper, copper alloy, etc. Sufficient current carrying performance can be secured without using a weak conductive material, and the fixed terminal plate 7 is made of an iron material that is somewhat inferior in conductivity but has excellent strength, and the terminal screw 9 is screwed into the screw. Sufficient strength of the hole 8 can be ensured.

Although the above embodiments have been shown in the case of an electromagnetic relay, other electromagnetic devices in which the connection to the electromagnetic coil is performed by connection to another coil external terminal provided on the surface of the case are also applicable. Of course, it can also be applied in the same way.

As described above, the electromagnetic device of this invention consists of a coil frame provided with a coil lead-out terminal, a case housing the coil frame, a terminal piece attached to the case and forming a screw hole, and a side of the terminal piece. a fixed terminal plate having a connecting piece bent at a portion to form a caulking protrusion;
A conductive piece having a shape having a screw insertion hole that matches the screw hole, and a caulking hole that is caulked to the caulking projection, and a side surface of the tip of the piece having the caulking hole elastically contacts the coil output terminal. Since the terminal screw is provided with a flexible spring and a terminal screw screwed into the screw hole through the screw insertion hole, the following effects are achieved.

That is, since the conductive spring and the fixed terminal plate are integrally formed by the caulking projection, it becomes possible to form blocks during assembly, and the assembly of the electromagnetic device becomes easy. In addition, the mounting strength of the conductive spring can be increased by reinforcing the mounting strength of the conductive spring with terminal screws and supporting the conductive spring with a connecting piece having a caulking projection. , it is possible to increase the elastic contact force with respect to the coil lead terminal. Furthermore, by tightening the external conductor between the terminal screw and the conductive spring, sufficient current carrying performance can be ensured, and the fixed terminal board can be made of strong steel, etc., making it possible to tighten the screw tap of the screw hole. The strength can be increased,
The tightening strength of the terminal screw can be increased.

[Brief explanation of the drawing]

Figures 1 and 2 are an external perspective view and an exploded perspective view showing a conventional example, Figures 3A and B are explanatory views of its main parts, and Figures 4A and B are an embodiment of the invention. It is an explanatory diagram of main part assembly. DESCRIPTION OF SYMBOLS 1... Body constituting the case, 5... Coil frame, 6... Frame constituting the case, 7... Fixed terminal board, 7a... Terminal piece, 7b... Connection piece, 8
... Screw hole, 9 ... Terminal screw, 12 ... Conductive spring, 12'a, 12'b ... Piece, 13 ... Coil outlet terminal, 17 ... Screw insertion hole.

Claims (1)

[Scope of utility model registration request] A coil frame with a coil outlet terminal, a case that houses the coil frame, a terminal piece that is attached to the case and has a screw hole, and a connection that is bent on the side of the terminal piece to form a caulking protrusion. a fixed terminal plate having a substantially L-shape that overlaps the terminal piece and the connecting piece, a screw insertion hole that is aligned with the screw hole, and a caulking hole that is caulked with the caulking projection; An electromagnetic device comprising: a conductive spring whose side surface of a tip end of a piece having a hole elastically contacts the coil outlet terminal; and a terminal screw screwed into the screw hole through the screw insertion hole.