JPH058644Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an electromagnet device used for opening and closing contacts of an electromagnetic relay.

[Background technology]

FIG. 3 shows an example of a coil frame 70 used in a conventional electromagnet device. This coil frame 70 is
A coil 71 is wound thereon, and terminals (coil connection terminals) 73, 73 are provided for connecting both ends of the coil wire 72, respectively. Coil wire 7
After the two ends are wrapped around the terminals 73, 73,
be soldered.

However, conventionally, the heat during soldering melts the coil frame (the shaded area in the figure) near the terminal, and when the melted resin hardens, the resin is used to coil the coil wire near the terminal. Sometimes I got stuck in the frame. Therefore, even if the terminal was moved slightly, the coil would break, resulting in many failures.

[Purpose of invention]

In view of the above circumstances, the object of this invention is to provide an electromagnet device that is free from failure due to coil disconnection.

[Disclosure of invention]

In order to achieve the above object, this invention has an iron core passed through a coil frame having a coil wound around it and equipped with terminals for connecting both ends of the coil strands, and one end of an L-shaped yoke attached to one end of the iron core. The other end of the yoke is coupled to the other end of the core, and one end of an armature is magnetically connected to the other end of the yoke so as to be swingable, so that the armature can be connected to and separated from the other end of the core. In the electromagnet device, a recess for separating the coil wire from the coil frame is provided at a position adjacent to the terminal at least in the vicinity of the terminal of the coil frame where the coil wire passes through. The gist is an electromagnetic device characterized by:

This will be explained in detail below with reference to a drawing showing an electromagnetic relay in which one embodiment thereof is used.

As shown in FIGS. 1 and 2, this electromagnetic relay includes an electromagnet device and a contact mechanism.
The electromagnet device includes a coil frame 1, an iron core 2, an L-shaped yoke (L-shaped yoke) 3, and an armature 4. The contact mechanism includes a contact spring 5, a movable contact 6, and fixed contacts 7 and 8. A coil 9 is wound around the central body of the coil frame 1. The collar portion 1a at one end of the coil frame has two opposing walls 1b, 1
c is formed. Contact terminal fittings 41, 4 are provided on these walls 1b, 1c so as to cross between them.
2 and 44 are formed simultaneously with the coil frame and are supported through the coil frame. The contact terminal fitting 41 has one fixed contact (NO contact) 8 facing the movable contact 6 in between.
is carried. The leg portion 41a of the contact terminal fitting 41 protrudes to the outside and is bent and extended to form a NO terminal. Contact terminal fitting 4
2 carries the other fixed contact (NC contact) 7. The leg portion of this contact terminal fitting 42 is divided into three parts and each protrudes outside, one of which is 42a.
is extended and becomes an NC terminal. The contact terminal fitting 44 is electrically connected to the movable contacts 6, 6 as described later. This contact terminal fitting 44
The leg portion 44a protrudes to the outside and is bent and extended to form a COM terminal. wall 1c
A spare coil terminal fitting 43 is also attached by molding at the same time. The wall 1b has cutouts 1h, 1 for passing through a partition wall provided in the case, which will be described later.
i is formed. Collar part 1f at the other end of the coil frame
Coil terminal fittings 45, 46 and a spare coil terminal fitting 47 are attached to the coil frame by simultaneous molding with the coil frame. The coil terminal metal fitting 45 is divided into three parts, and these separated parts protrude to the outside. One of them 45a is elongated and serves as a coil terminal, and the other one 45b is formed into a hook shape and serves as a coil terminal. It serves as a coil connection terminal for connecting one end 9b of the wire 9a. The coil terminal fitting 46 is divided into two parts, and these separated parts protrude to the outside. One of them 46a is elongated and serves as a coil terminal, and the other one 46b is formed into a hook shape and serves as a coil terminal. It serves as a coil connection terminal for connecting the other end 9c of the wire 9a. Both ends 9b and 9c of the coil wire are wound and soldered around coil connection terminals 45b and 46b, respectively. Coil wire 9a near coil connection terminals 45b and 46b of coil frame
Recesses 1j, 1j are provided where the material is passed through. These recesses 1j, 1j are provided with terminals 45b,
A rectangular hole is formed in a position adjacent to the coil 9 side around the coil 46b, and the coil wire 9a that is drawn out from the coil 9 and connected to the terminals 45b and 46b is placed above the recesses 1j and 1j. The terminals 45b and 46
In the recesses 1j, 1j adjacent to b, the coil wire 9
a is isolated from the coil frame 1.

The iron core 2 is passed through the coil frame 1 constructed as described above. One end 3a of the yoke is coupled to one end 2a of the iron core. This connection is performed, for example, by fitting the iron core end 2a into a caulking hole provided in the yoke one end 3a and caulking it. The other end 3b of the yoke connected to the iron core is the other end 2b of the iron core.
is facing. One end 4a of the armature 4 is swingably magnetically connected to the other end 3b of the yoke, and is capable of moving toward and away from the other end 2b of the iron core.

The contact spring 5 is supported by caulking or the like on the surface of the armature 4 opposite to the side facing the iron core.
One end 5a thereof extends further than the other end 4b of the armature. Movable contacts 6, 6 located between fixed contacts 7, 8 are supported on both sides of this one end 5a. Branch portions 5c and 5d extending in the same direction are formed on both sides of the movable contact support portion 5a. These branching parts 5c, 5d are connected to two walls 1b, 1
Step 1 formed by molding etc. on the inside of c
d and 1e, respectively, and are bent in a direction away from the other end 2b of the iron core. By doing so, the branched portions 5c and 5d function as return springs. That is, the movable contact support portion 5a is always biased toward the fixed contact 7 side. The other end 5b of the contact spring is caulked to a contact terminal fitting 44 between both walls 1b and 1c. On both sides of the other end 5b, bent portions 5h and 5i are bent away from the armature 4 and further bent away from the movable contact support portion 5a.
is formed. Cutouts 5f and 5g are formed between the bent portions 5h and 5i and the other end 5b, respectively. Bent part 5h from the middle of the contact spring,
5i, a U-shaped notch 5e is formed. The inner part 5j of this U-shaped notch 5e
is fitted into a recess 4c provided in the armature 4. This portion 5j lightly presses one end 4a of the armature so that the one end 4a of the armature is magnetically connected to the other end 3b of the yoke in a swingable manner.

The above components are housed in a cover 21 and closed with a base 22 fitted with the cover 21.
The base 22 has terminal holes 22a formed therein. From these holes 22a... each terminal 41a,
42a, 44a, 45a, and 46a are projected to the outside. The cover 21 has an inverted L shape made of insulating material on the inside.
A letter-shaped partition wall 21a and a U-shaped partition wall 21b are provided. The inverted L-shaped partition wall 21a is located between the contact terminal fitting 41 and the coil 9, and the U-shaped partition wall 21b is located between the yoke 3 and the coil 9. Both partition walls 21a and 21b serve to improve the insulation between the coil and components electrically connected to the contacts.

This electromagnetic relay is as shown above,
When current is passed through the coil 9, the armature 4 is attracted to the other end 2b of the iron core 2, and as the armature 4 moves, the contact spring 5 is bent toward the iron core, and the movable contact 6
and the fixed contact 8 are closed. When the current to the coil 9 is cut off, the attractive force between the armature 4 and the other end 2b of the core disappears, and the armature 4 is separated from the other end 2b of the core by the restoring force of the contact spring 5. With the movement, the space between the movable contact 6 and the fixed contact 7 is closed. In this electromagnetic relay, the movable contact and the fixed contact are opened and closed in the above manner.

As seen above, the electromagnet device used in this electromagnetic relay has recesses 1j, 1j provided in the coil frame 1 near the coil connection terminals 45b, 46b where the coil wire 9a is passed. There is. When the coil wire ends 9b, 9c are soldered to the coil connection terminals 45b, 46b, the portions that are melted under the influence of soldering heat are the portions near the coil connection terminals. Like this electromagnet device, the coil wire 9a near the coil connection terminals 45b, 46b
The coil wire 9a is connected to the terminal 45 where it is passed through.
Recesses 1j, 1j for separating coil wires that prevent contact with the coil frame 1 at positions adjacent to b, 46b
If this is provided, the distance between the coil connection portion and the coil frame is increased at the recess position, making it less susceptible to the effects of soldering heat. Moreover, since the coil wire is separated from the coil frame at the recess position, even if the resin at the recess position melts, when the resin hardens, the coil wire will not be hardened to the coil frame by this resin. . In this way, in this electromagnet device, the coil wire is not fixed to the coil frame after soldering, so there is no possibility that the coil wire will be disconnected due to the coil connection terminal being moved. Therefore, the electromagnetic relay using the electromagnetic device according to this invention is also free from failure due to coil disconnection.

The electromagnet device according to this invention is not limited to the above embodiment.

[Effect of idea]

As described above, in the electromagnet device according to this invention, an iron core is passed through a coil frame in which a coil is wound and is equipped with terminals to which both ends of the coil wire are connected, and an L is connected to one end of the iron core. One end of the letter-shaped yoke is coupled, the other end faces the other end of the core, one end of an armature is magnetically connected to the other end of the yoke so as to be able to swing, and the armature is connected to and separated from the other end of the core. An electromagnet device that has become possible is characterized in that a recess for separating the coil wire from the coil frame is provided at a position adjacent to the terminal where the coil wire is passed through. Therefore, failures due to coil disconnection will not occur.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an electromagnetic relay using an embodiment of the electromagnet device according to this invention, Fig. 2 is an assembled sectional view of the same, and Fig. 3 is a perspective view showing the coil frame of the conventional electromagnet device. It is a diagram. 1... Coil frame, 1j... Recessed portion of coil frame, 2
...Iron core, 2a...One end of the iron core, 2b...Other end of the iron core, 3...L-shaped yoke, 3a...One end of the L-shaped yoke, 3b...The other end of the L-shaped yoke, 4...
Armature, 4a... One end of armature, 9... Coil,
9a... Coil wire, 9b... One end of coil wire, 9c... Other end of coil wire, 45b, 46b
...Terminal for coil connection.

Claims (1)

[Scope of utility model registration request] An iron core is passed through a coil frame that has a coil wound around it and has terminals for connecting both ends of the coil wire, and one end of an L-shaped yoke is connected to one end of this iron core, and the other end is connected to the other end of the iron core. confront,
In an electromagnet device in which one end of an armature is swingably magnetically connected to the other end of the yoke, and the armature can be moved into and out of contact with the other end of the iron core, at least a coil element near the terminal of the coil frame is provided. An electromagnet device characterized in that a recess for isolating the coil wire is provided at a position adjacent to the terminal where the wire is passed through to isolate the coil wire from the coil frame.