JPH0515700Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a hinge type relay in which an armature that drives a contact mechanism is configured to swing forward and backward.

[Background technology]

In electromagnetic relays, the current (voltage) flowing through the coil
Since the current (voltage) flowing through the coil and the contact are often different, it is necessary to ensure insulation between the coil and the contact. Depending on the relay, current (voltage) may flow through magnetic path components such as the armature, yoke, and iron core, so it is also required to ensure insulation between these magnetic path components and the coil. Ru.

FIG. 5 shows an example of an electromagnetic block of a conventional electromagnetic relay. As shown in the figure, this electromagnetic block includes an iron core 1 and a yoke 2 as magnetic path components. Insulation between the iron core 1 and the coil 3 is provided by a coil frame 4. Insulation between the yoke 2 and the coil 3 is achieved by placing an insulating tape 5 around the outer circumference of the coil 3. However, there is a gap A between the insulating tape 5 and the coil frame flange 4a.
may occur, and the insulation between the yoke 2 and the coil 3 is uncertain.

Further, as shown in FIG. 6, an insulating frame 6 may be inserted between the coil 3 and coil frame 4 and the yoke 2 to ensure insulation between the yoke 2 and the coil 3. However, in this case, a special component called the insulating frame 6 is required. Furthermore, the entire electromagnet becomes larger due to the insulating frame 6, which does not meet the need for miniaturization.

As shown in FIG. 7, it has been considered to stretch the insulating tape 5 from the flange 4a to the flange 4b of the coil frame 4, but since the end of the tape 5 is exposed, it easily peels off.

On the other hand, among electromagnetic relays, in the case of a hinge type relay, when the armature swings, the characteristics may become unstable if it shifts from side to side. Therefore, it is required to prevent the armature from shifting to the left or right when the armature swings.

[Purpose of invention]

In view of the above, the purpose of this invention is to provide a hinge-type relay that ensures reliable insulation between the coil and yoke without increasing the number of parts and has stable characteristics.

[Disclosure of invention]

Therefore, in order to achieve the above object, this invention consists of an electromagnetic block in which a yoke extends from one end of an iron core around which a coil is wound and the other end faces the other end of the iron core, and a movable contact is supported. A switch block includes a terminal plate on which a spring and a fixed contact are supported, and is fixed to an insulator, and a part of the yoke is magnetically connected to the other end of the yoke and is swingably supported, and the iron core is attracted to the switch block. an armature whose one end is biased toward the other end of the core by a force and biased away from the other end of the core by the operating spring; In a hinge-type relay in which a movable contact and a fixed contact are opened and closed, the insulator has an insulating wall that wraps around between the coil and the yoke to insulate the coil and the yoke. The gist of the invention is a hinge-type relay, characterized in that a part of the wall has a locking part that sandwiches the armature from the left and right sides to prevent the armature from shifting to the left and right when the armature swings.

This idea will be explained in detail below.

The hinged relay of this invention includes an electromagnetic block, a switch block and an armature. By swinging the armature forward and backward, the movable contact and the fixed contact are opened and closed.

The electromagnetic block has an iron core, a yoke and a coil.

The core may have a uniform thickness and shape throughout, or may be thicker at the tip (the other end of the core), and is not particularly limited.

A yoke extends from one end of the iron core, and the other end of the yoke faces the other end of the iron core. The yoke may be formed integrally with the iron core, or may be formed separately and magnetically connected by caulking, press-fitting, etc., and is not particularly limited.

A coil is wound around the iron core. The coil is wound around the coil frame and then around the iron core to ensure insulation from the iron core. Further, the coil is insulated from a portion of the armature and a portion of the yoke by the coil frame flange.

The switch block consists of an operating spring carrying a movable contact and a terminal plate carrying a fixed contact fixed to an insulator.

The number of movable contacts and fixed contacts is not limited to one each, and may be more than one. There are no particular limitations on the number of operating springs and terminal boards. The type of contact is not particularly limited, such as type A, type B, or type C.

In this invention, the insulator of the switch block is
It has an insulating wall that extends between the coil and the yoke to provide insulation between the coil and the yoke. Therefore, insulation between the coil and the yoke can be reliably achieved without increasing the number of parts. Furthermore, a portion of this insulating wall has a locking portion that sandwiches the armature from the left and right sides and prevents the armature from shifting from side to side when swinging. Therefore, when the armature swings, it is prevented from shifting to the left or right, and the characteristics are stabilized. In addition, since there is no need to process the other end of the yoke into a U-shape to stop the armature from moving left and right when the armature swings, it is especially useful when making AC relays. This makes it extremely easy to polish the core head (the other end of the core).

The insulator may have, for example, a platform portion to which the operating spring and the terminal plate are fixed, and a rising wall at one end. A slightly smaller press-fit hole having the same shape as the yoke is formed at the root of this rising wall, and the portion of the yoke facing the iron core is press-fitted into this hole along the rising wall up to the vicinity of its root. In this way, the rising wall becomes the insulating wall and is fixed to the yoke. However, the structure of the insulating wall is not limited to this example. The insulator is made of, for example, a molded product such as resin, but may be made of other materials.

The detent portion is formed on a portion of the insulating wall. For example, the tip of the insulating wall is shaped into a U-shape, and the armature is fitted into the recess. Both opposite sides of the U-shape become the movement stopping parts. Preferably, the spacing between the detents is only slightly larger than the width of the armature. If the distance between the detent portions is less than the width of the armature, the armature may not operate smoothly. Note that the method of forming the locking part is not limited to this. For example, if you drill a hole in a part of the insulating wall that is slightly larger than the cross section of the armature and pass the armature through this hole, Both sides serve as a stopper.

A portion of the armature is magnetically connected to the other end of the yoke and is swingably supported. One end of the armature is biased toward the other end of the core by the attraction force of the core, and is biased away from the other end of the core by an operating spring.
For example, when the armature swings (for example, forward swings) in a direction in which one end faces the other end of the core, the movable contact closes and/or opens with the fixed contact,
When the armature swings (for example, reverse swings) in a direction in which one end part moves away from the other end of the core, the movable contact opens and/or closes with the fixed contact.

Hereinafter, embodiments will be described in more detail with reference to drawings showing embodiments.

FIG. 1 shows an embodiment of the present invention in its entirety, and FIG. 2 shows it in an exploded view.
Figure 3 shows the side view, partially in section,
FIG. 4 shows part of another aspect.

As shown in these figures, this hinge type relay consists of an electromagnetic block 11 and a switch block 12.
and an armature 13.

The electromagnetic block 11 has an iron core 1, a yoke 2, and a coil 3. A coil frame 4 is wound around the iron core 1, and a coil 3 is wound around the coil frame 4. One end of an L-shaped yoke 2 is magnetically connected to one end of the iron core 1, and the other end 2b of the yoke 2 faces the other end 1b of the iron core 1. The coil frame 4 ensures that the coil 3 is insulated from a portion of the yoke 2, the iron core 1, and the armature 13.

The switch block 12 includes a movable contact 14, a fixed contact 15, an operating spring 16, a terminal plate 17, and
It has an insulator 18. The movable contact 14 is supported by an operating spring 16 and the fixed contact 15 is supported by a terminal plate 17. The insulator 18 is made of a molded product such as resin, and has an L-shape including a platform portion 18a and a rising wall 18b rising from one end of the platform portion 18a, and a press-fit hole is formed at the base of the rising wall 18b. 18c is formed. Operation spring 1
6 and the terminal plate 17 are fixed to the platform portion 18a. An L-shaped yoke 2 is inserted into the press-fit hole 18c.
One side facing the iron core 1 is press-fitted and fixed to the vicinity of the corner along the rising wall 18b. The rising wall 18b is the coil frame collar portion 4
It is in close contact with a and 4b. The rising wall 18b is
The surface of the yoke 2 facing the coil 3 is covered to provide insulation between the yoke 2 and the coil 3.

The tip of the rising wall 18c is processed into a U-shape, and protrusions 18d and 18e are formed on both sides. These protrusions 18d and 18e extend longer than the other end of the yoke 2. These protrusions 18d,
The armature 13 is inserted between the parts 18e at or near the hinge part.

The armature 13 is formed in a dogleg shape, and the inner corner of the armature is magnetically connected to the other end of the yoke 2, and is swingably supported. Further, due to the suction force of the iron core 1, the one end portion 13a is urged in the direction C toward the other end of the iron core 1, and the operating spring 1
6 in the direction D away from the other end of the iron core 1.

When a current is passed through the coil 3, the attractive force of the iron core 1 exceeds the biasing force of the operating spring 16, and the armature one end 13
The armature 13 swings in a direction C in which a points toward the other end of the iron core 1. At this time, the movable contact 14 is the fixed contact 1
Closed at 5. When the current in coil 3 is cut off, iron core 1
The attractive force is removed, and the armature 13 swings in the direction D in which one end 13a of the armature separates from the other end of the iron core 1 due to the bias of the operating spring 16. At this time, the movable contact 14 separates from the fixed contact 15. During these swings, the armature 13 is prevented from shifting to the left or right by the protrusions 18d and 18e, resulting in stable operation and stable characteristics.

This invention is not limited to the above embodiments.

[Effect of idea]

As seen above, in the hinge type relay according to this invention, the insulator of the switch block has an insulating wall that wraps around between the coil and the yoke to provide insulation between the coil and the yoke. Since this insulating wall has a stopper part that sandwiches the armature from the left and right sides to prevent it from shifting to the left and right when the armature swings, it is possible to insulate the coil and yoke without increasing the number of parts. can be ensured and the characteristics are stable.

[Brief explanation of the drawing]

Fig. 1 is an assembled perspective view of one embodiment, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a partially sectional side view thereof, and Fig. 4 is an exploded perspective view of the first embodiment.
The figure is a partial side view of another conventional example, Figure 5 is a partial cross-sectional side view of one of the conventional examples, Figure 6 is a partial cross-sectional side view of another conventional example, and Figure 7 is yet another conventional example. FIG. 1... Iron core, 1b... Iron core other end, 2... Yoke, 2... Yoke other end, 3... Coil, 11...
Electromagnetic block, 12...Switch block, 1
3... Armature, 14... Movable contact, 15... Fixed contact, 16... Operating spring, 17... Terminal plate, 18
... Insulator, 18b ... Standing wall that is an insulating wall,
18d, 18e... Protrusions serving as movement stopping parts.

Claims (1)

[Scope of utility model registration request] An electromagnetic block with a yoke extending from one end of the core around which the coil is wound and the other end facing the other end of the core, an operating spring carrying a movable contact, and a terminal plate carrying a fixed contact are insulators. A switch block is fixed to the yoke, and a part of the yoke is magnetically connected to the other end of the yoke and is swingably supported. The hinge-type relay includes an armature which is biased in a direction away from the other end of the iron core by the operating spring, and in which the movable contact and the fixed contact are opened and closed by forward and reverse swinging of the armature. , the insulator has an insulating wall that wraps around between the coil and the yoke to provide insulation between the coil and the yoke, and the armature is connected to a part of the insulating wall by sandwiching it from the left and right sides. A hinge-type relay characterized by having a stopper part that prevents the pole from shifting to the left or right when it swings.