JPH0574302A - Enclosed type electromagnetic relay - Google Patents

Abstract

PURPOSE:To improve the productivity of an enclosed type electromagnetic relay by eliminating a sealing failure at the terminal portion of the electromagnetic relay equipped with a folded external connection terminal to withstand a large current-carrying capacity. CONSTITUTION:The enclosed type electromagnetic relay is equipped with at least an external connection terminal 61a-1 passing through a base cage body 3 and then enclosing a through region with a seal material 5. The relay is made up by installing a sealant inflow means 61a-1 at an external connection terminal 61a-1 formed folded in a cross direction. The means 61a-1'' goes into a bent part 61a-1' from the edge in a cross direction in the enclosed region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a hermetically sealed electromagnetic relay, and particularly to eliminate a sealing failure in the terminal portion of an electromagnetic relay having an external connection terminal folded in half to endure a large current carrying capacity. Relates to an electromagnetic relay with improved productivity.

In the field of high-current electromagnetic relays that switch amperes of current, only the external connection terminal area of the terminal that becomes the current-carrying flow path, in which the cross-sectional area is narrowed, is folded in two to reduce the cross-sectional area in that area. The means to increase are often used.

[0003]

2. Description of the Related Art FIG. 3 is a principle diagram showing a configuration example of a main part of a conventional hermetically-sealed electromagnetic relay, and in the figure, a case of a one-circuit relay will be described as an example for easy understanding.

FIG. 4 is a diagram for explaining the problem. In FIG. 3, a sealed electromagnetic relay (hereinafter referred to as a relay) 1 is roughly divided into a relay main body 2, a box-shaped base casing 3 made of an insulating material such as resin, and a cover 4.

The inner relay main body 2 is composed of an electromagnet 21 and a contact spring set 22 which is operated by an attractive force generated in the electromagnet 21 when the electromagnet 21 is energized. This electromagnet
21 is a coil 21b wound around a bobbin 21a having substantially square flanges at both ends in the longitudinal direction, and one end of the coil 21b is exposed on the central axis of the coil 21b by projecting from one side flange (upper side in the figure). The two external connection terminals 21c for applying current to the coil 21b penetrate the other (lower side in the figure) flange of the bobbin 21a. Are installed.

When a required current is applied to the external connection terminal 21c from the outside, a required suction force is generated on the exposed end surface protruding from one side (upper side in the figure) flange of the iron core.

On the other hand, the contact spring set 22 is fixed to the other end surface of the iron core while maintaining electrical connection by means such as caulking, and then bent at a substantially right angle to the exposed end surface side (upper side in the figure). The yoke 22a fixed to the lower flange and the armature 22b positioned in contact with the upper end of the yoke 22a are held on the yoke 22a so that the armature 22b can rotate about the end, and a common end is provided. Movable contact spring 22c in which terminal 22c- ₁ is formed, and the movable contact spring
The moving contact of the movable contact fixed to the predetermined position on the free end side of 22c and fixed on both sides (vertical direction in the figure) Make contact terminal 22d with make contact at corresponding positions on both sides, break contact terminal 22e with break contact It consists of and.

The make contact terminal 22d and the break contact terminal 22e are positioned and fixed by the upper and lower two flanges of the bobbin 21a, and are kept fixed at a predetermined distance. Is formed.

Further, the movable contact of the movable contact spring 22c is
When a current is not applied to the coil 21b described above, the movable contact spring 22c moves to the upper side of the drawing to contact the break contact located above due to the spring property of the movable contact spring 22c, but a predetermined current is applied to the coil 21b from the external connection terminal 21c. When is applied, the attraction force generated in the iron core resists the elasticity of the movable contact spring 22c and attracts the armature 22b to the lower side of the drawing, so the movable contact connected to the common terminal 22c _-1 moves downward and is positioned on the lower side. It is designed to make contact with make contacts.

Therefore, "common terminal 22c- ₁ to break contact terminal 22e" is determined by whether or not a current is applied to the coil 21b.
Connection between external connection terminal 22e _{-1 (} not shown) and "External connection terminal 22d between common terminal 22c _-1 to make contact terminal 22d
It is possible to obtain the relay main body 2 in which the "connection between _-1 " is alternately switched.

[0011] In this case, the external connection terminal 22d _-1 width or cross-sectional area is throttled because the make contact terminal 22d and the break contact terminals 22e to the current path of the switching current can be freely set the respective thicknesses 22e _{- Even in} the area of ₁ , it is easy to obtain the required cross-sectional area corresponding to the current carrying capacity.

However, the movable movable contact spring 22c, which is integrated with the common terminal 22c _-1 , which serves as a conduction path for the switching current, needs to have a spring property, so that the thickness thereof is limited. This is a common terminal whose width and therefore cross-sectional area is reduced.
This means that it is difficult to obtain the required cross-sectional area corresponding to the current carrying capacity in the 22c _-1 region.

Therefore, as shown in the drawing, the area of the common terminal 22c _-1 is folded in two to increase the cross-sectional area in the area. A box in which the relay body 2 thus obtained is formed with a through hole 3a into which each of these external connection terminals 21c, 22e _-1 , 22d _-1 and a common terminal 22c _-1 can be inserted. The relay main body 2 is housed in a base housing 3 of a rectangular shape, and the concave hole 3b formed outside each through hole is filled with an adhesive 5 to seal the relay main body 2 as shown in a partially enlarged view (a). It is possible to fix the base casing 3 while keeping it sealed.

Next, a box-shaped cover 4 having a convex step 4a formed at a position corresponding to the upper side of the peripheral wall of the base casing 3.
Is mounted so as to cover the base casing 3 and the periphery thereof is adhered with an adhesive or the like, so that the required sealed electromagnetic relay 1 can be configured.

[0015]

The relay 1 has an advantage that it can have a closed structure without using a particularly difficult technique.

However, since the area of the common terminal 22c _-1 is folded in two, a gap is formed in the bent portion unless the bent portion is tightly bent. The common terminal 22c
FIG. 4, which is an enlarged view of the _-1 portion, shows such a state, and there is a gap A in the bent portion 22c- ₁ '.

Particularly in this case, the area of the common terminal 22c _-1 is sealed to the base casing 3 by the adhesive 5, but the common terminal 22c _-1 is formed along the bent portion 22c _-1 '.
Since there is a gap A penetrating the inside of the region, the inside of the relay 1 after being sealed is communicated by the gap A, and as shown by the arrow a along with the temperature change inside the relay 1 during operation. Airflow is generated.

Therefore, there is a problem that the characteristics as a relay and the stability thereof are deteriorated and the improvement of productivity cannot be expected.

[0019]

Means for Solving the Problems The above-mentioned problem is a sealed electromagnetic relay having at least an external connection terminal for penetrating a base casing and sealing the penetrating region with a sealing material.
The external connection terminal formed by folding in the width direction is achieved by a sealed electromagnetic relay in which a sealing material inflow means is provided in the sealed region, the sealing material flowing in from the end in the width direction to the inside of the bent portion.

[0020]

When the terminal portion is formed so that the adhesive can also penetrate into the bent portion of the external connection terminal formed by folding in two, the gap A described in FIG. 4 can be filled with the adhesive. it can.

In the present invention, the relay is constructed by using a terminal having a notch or a hole reaching the gap inside the bent portion in the seal region of the external connection terminal which is formed in two folds.

Therefore, it is possible to construct a relay having a reliable hermetically-sealed structure without deteriorating the characteristics and the stability thereof, thereby improving the productivity.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining a configuration example of a main part of a sealed electromagnetic relay according to the present invention, wherein (1-1) is an extracted main body of the relay shown in FIG. 3, and (1-2) Shows a partial cross-section of the sealed state.

FIG. 2 is a diagram showing another embodiment configuration example. It should be noted that, in each of the drawings, the case of a one-circuit relay having the same configuration as that in FIG. 3 is taken as an example, and thus the same target members as those in FIG.

In FIG. 1, the relay main body 6 is composed of the electromagnet 21 described in FIG. 3 and a contact spring set 61 that operates by engaging with the electromagnet 21. In particular, the contact point spring set 61 in this case includes a yoke 22a fixed to the iron core of the electromagnet 21 of FIG. 3 and an armature 22b located in contact with the upper end side of the yoke 22a.
A movable contact spring 61a having a common terminal 61a _-1 formed at one end thereof, and a movable contact spring 61a.
It is composed of a make contact terminal 22d having a make contact and a break contact terminal 22e having a break contact at corresponding positions on both sides in the moving direction of the movable contact which is fixed to a predetermined position on the free end side so as to project.

The make contact terminal 22d and the break contact terminal 22e are positioned and fixed by the upper and lower two flanges of the bobbin 21a constituting the electromagnet 21, and the distance between the make contact and the break contact is predetermined. The spacing is the same as in the case of FIG. 3, and when the movable contact of the movable contact spring 61a connected to the common terminal 61a _-1 is not applied to the coil 21b forming the electromagnet 21, a break occurs. It is similar to the case of FIG. 3 in that it contacts the contact and makes contact with the make contact when a predetermined current is applied to the coil 21b.

Therefore, "common terminal 61a _-1 to break contact terminal 22e can be selected depending on whether or not a current is applied to the coil 21b.
Connection between the external connection terminals 22e _{-1 (} not shown) and "External connection terminal 22d of common terminal 61a _-1 to make contact terminal 22d"
It is possible to obtain the relay main body 6 in which the "connection between _-1 " is switched alternately.

And in particular in this case the common terminal
Bent portion 61a of 61a _{-1 -1} ', the base housing 3 of Figure 3
A semi-circular notch 61a _-1 ″ as shown in the enlarged view (a) is formed at a position corresponding to the sealing area of the adhesive 5 when it is inserted into the through hole 3a up to a depth exceeding the plate thickness. There is.

This means that when the bent portion 61a- ₁ 'has the gap A as described in FIG.
61a _-1 "has reached the gap A. Therefore, the relay body 6 having the common terminal 61a _-1 is provided.
Is attached to the base casing 3 described with reference to FIG. 3 and is sealed with the adhesive 5, the state of the common terminal 61a _-1 is shown (1-
As shown in 2), the adhesive 5 which is the sealing material is the notch 61
Since it enters the area of the gap A from a _-1 ″, the common terminal 61
Since a _-1 is sealed inside and outside, and the gap A described in FIG. 4 can be eliminated, it is possible to configure a sealed electromagnetic relay capable of reliably sealing.

FIG. 2 showing another embodiment is the common terminal of FIG.
It shows the case where the notch formed in 61a _-1 is replaced with a linear space path.In the figure, the common terminal having the linear space path is distinguished from the above-mentioned common terminal for convenience and is referred to as common terminal 61a _-2. However, the other configurations are completely the same as those in FIG.

In FIG. 2, (2-1) is a perspective view of the same main part as the enlarged view (a) of FIG. 1 and a side view of the perspective view as seen from the direction of arrow B. 2-2) shows a partially cross-sectional view of the sealed state.

In (2-1), common terminal 6 in this case
1a to the position described in FIG. 1 _-2, it is formed with a linear spatial path 61a _-2 "from the opposite end sides in the width direction with respect to the bending portion 61a _-2 ', the linear spatial channel 61a _{- 2} ″ is the bent part 6
It is formed up to the position reaching 1a _-2 '.

This means that the linear space path 61a _-2 "reaches the clearance A when the clearance A as shown in FIG. 4 exists in the bent portion 61a _-2 '. ..
The linear space path 61a _-2 ″ is, for example, the common terminal 61a.
_-This can be easily realized by forming a groove in the above position by a normal bending process before folding the _-2 region in half.

Therefore, when the relay main body 6 of FIG. 1 equipped with such a common terminal 61a- ₂ is mounted on the base casing 3 described in FIG. 3 and sealed with the adhesive 5, the state of the common terminal 61a- ₂ part is As shown in (2-2), the adhesive 5 that becomes the sealing material
Enters from the linear space path 61a _-2 "and reaches the area of the clearance A, the common terminal 61a _-2 is sealed inside and outside, and the clearance A is closed in the same manner as in FIG. Since it can be eliminated, the required sealed electromagnetic relay can be constructed.

[0035]

As described above, according to the present invention, the productivity is improved by eliminating the sealing failure in the terminal portion of the electromagnetic relay having the external connection terminal folded in half to endure a large current carrying capacity. A sealed electromagnetic relay can be provided.

In the description of the present invention, the case where the common terminal is formed in two folds is taken as an example, but any terminal and any position at any position can be used as long as the terminals are formed by folding. It is clear that the same effect can be obtained by taking

[Brief description of drawings]

FIG. 1 is a diagram illustrating an example of a main part configuration of a sealed electromagnetic relay according to the present invention.

FIG. 2 is a diagram showing another embodiment.

FIG. 3 is a principle diagram showing a configuration example of a main part of a conventional sealed electromagnetic relay.

FIG. 4 is a diagram illustrating a problem.

[Explanation of symbols]

3 Base case 3a Through hole 5 Sealant (adhesive) 6 Electromagnetic relay body 21 Electromagnet 21a Bobbin 21b Coil 22a Yoke 22b Armature 22d Make contact terminal 22e Break contact terminal 61 Contact spring assembly 61a Movable contact spring 61a _-1 Common terminal 61a _-1 'Bend 61a _-1 "Notch 61a _-2 Common terminal 61a _-2 ' Bend 61a _-2 " Linear space path

Claims (3)

[Claims] 1. A sealed electromagnetic relay, comprising at least an external connection terminal for penetrating a base casing (3) and thereafter sealing the penetrating region with a sealing material (5), which is formed by folding in the width direction. External connection terminal (61a _-1 )
The sealed electromagnetic relay is characterized in that a sealing material inflow means is provided in the sealed region, the sealing material flowing in from the end in the width direction to the inside of the bent portion. 2. The seal material inflow means according to claim 1, wherein the notch (6) formed on the outer surface of the bent portion has a depth exceeding the plate thickness.
1a _-1 ") is a sealed electromagnetic relay. 3. The linear space passage (6) in which the sealing material inflow means according to claim 1 is formed in the width direction over the length from the end side on the opposite side to the bent portion to the inside of the bent portion.
1a _-2 ″) is a sealed electromagnetic relay.