JPS6367303B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact block for a small electromagnetic relay.

In recent years, with the miniaturization of electronic circuit elements, there has been a strong demand for miniaturization of electromagnetic relays. However, since electromagnetic relays have a complex structure and a large number of component parts, miniaturization increases the difficulty of assembling and manufacturing them.
For this reason, in conventional miniaturized electromagnetic relays, multiple terminals are precisely and accurately assembled in advance so that they can be easily and uniformly assembled and manufactured by simply fitting and gluing, without requiring screw fixing or position adjustment work. A contact block is used in which a contact spring assembly is constructed by placing a terminal on the terminal, molding it with an insulating material and fixing it, and attaching a contact to the other end of the terminal.

2 to 4 show a conventional contact block of this type, and FIG. 1 shows a small electromagnetic relay using this contact block. In this contact block 1,
As shown in FIG. 2, terminals 4 to 7 are fixed to an insulating member 8. The terminals 4 to 7 are connected to an upwardly extending connection piece 9, a pedestal piece 10, and fixed contact plate pieces 11 and 1.
2, and these connecting piece 9, pedestal piece 10, and fixed contact plate pieces 11 and 12 penetrate through the insulating member 8 and protrude on the opposite side from the terminals 4 to 7. The connecting piece 9, the pedestal piece 10, and the fixed contact plate pieces 11 and 12 are each bent laterally at a predetermined distance from the upper end surface of the insulating member 8. That is, one fixed contact plate piece 11 is bent at a height l ₁ lower than the pedestal piece 10, and the other fixed contact plate piece 12 is bent at a height l 1 lower than the pedestal piece 10.
It is bent at a higher height l ₂ . (3rd
(See figure) Then, one end of a movable contact spring 13 is fixed to the pedestal piece 10 in a horizontal direction as shown in FIG. Contact members 11a and 12a are fixed to the fixed contact plate pieces 11 and 12, respectively, on surfaces facing each other, and contact members 13a and 12a are fixed to the lower and upper surfaces of the movable contact spring 13 at positions corresponding to the contact members 11a and 12a, respectively. 13b is fixed. The movable contact spring 13 is normally in contact with the contact member 11a of the lower fixed contact plate piece 11 and the contact member 13a on the lower surface of the movable contact spring 13 due to its spring property, and is attached to the electromagnet frame 2. When the movable contact spring 13 is moved upward by the armature (not shown), the contact member 12a of the upper fixed contact plate piece 12 and the contact member 13b on the upper surface of the movable contact spring 13 are moved. We're starting to come into contact.

However, in the contact block of this small electromagnetic relay, the two fixed contact plate pieces 11 and 12 must be bent at different heights above the contact block 1 as described above, so the height of the bending position is The work of folding and bending accurately was complicated. In addition, two bent fixed contact plate pieces 11,
Contact members 11a and 12a are provided on opposite surfaces of 12.
In order to fix the contact members 11a and 12a, it is necessary to fix the contact members 11a and 12a to mutually different surfaces of both protruding fixed contact plate pieces 11 and 12, respectively, as shown in FIGS. 2 and 3 before bending. Contact member 11
The work of fixing a and 12a was also complicated.

The object of the present invention is to overcome these drawbacks and provide a contact block for a small electromagnetic relay in which the work of bending the fixed contact plate is easy and the contact members can be fixed on the same side. .

An embodiment of the present invention will be described below based on the drawings.

FIG. 5 shows an exploded perspective view of a small electromagnetic relay using a contact block according to an embodiment of the present invention, and FIG.
9 to 9 show contact blocks, and FIG. 10 shows a sectional view of a small electromagnetic relay.

In these figures, reference numeral 20 denotes an electromagnetic block, and a yoke 22 is attached to the electromagnet 21 so as to cover the lower surface and one end surface of the electromagnet 21 in a substantially L-shape. A pair of contact blocks 24,
Convex portions 23, 23 are formed to fit into the fitting holes 25, 25 of 24, respectively.

The contact block 24 has a substantially rectangular insulating member 26 made of synthetic resin or the like, and has terminals 27 to 3 at one end.
A conductive member having a 0 formed thereon is embedded and fixed.
These conductive members are connected to terminal 2 as shown in FIG.
Connection piece 31, pedestal piece 32, and fixed contact plate piece 3 extending to the other end sides of 7, 28, 29, and 30, respectively.
It has 3,34.

As shown in FIGS. 5 to 8, the insulating member 26 has cutouts 35, 36, 37 in the terminal protruding surface 26a.
has a notch 38 on the surface 26b opposite to the terminal protruding surface 26a. These notches 35
-38 are formed to an appropriate depth, and the surfaces 26a, 26b
It has a bottom that is almost parallel to.

The connection piece 31, the pedestal piece 32, and the fixed contact plate pieces 33 and 34 have cutouts 35, 36, 37, respectively.
It projects outwardly at 38 perpendicular to the bottom surface. That is, the connection piece 31, the pedestal piece 3
2. The fixed contact plate piece 33 protrudes toward the terminal protruding surface 26a, and the other fixed contact plate piece 34 protrudes from the surface 26b opposite to the terminal protruding surface 26a.

Connection piece 31, pedestal piece 32, fixed contact plate piece 3
3 and 34 are bent at right angles along the bottom surfaces of the respective notches 35, 36, 37, and 38. Therefore, the two fixed contact plate pieces 33 and 34 face each other on the side of the surface 26c adjacent to the two surfaces 26a and 26b so as to sandwich the insulating member 26 from both the upper and lower surfaces.

One end of a movable contact spring 39 is fixed to the upper surface of the base piece 32, as shown in FIG. Therefore, the other end of the movable contact spring 39 is connected to the two fixed contact plate pieces 3.
3 and 34, but due to its springiness, it is always in contact with the upper fixed contact plate 33 side. Contact members 33a and 34a must be fixed to the mutually opposing surfaces of the fixed contact plate pieces 33 and 34, respectively. For this purpose, as shown in FIG. 8, since the solid contact plate pieces 33 and 34 protrude upward and downward, it is necessary to fix each contact member 33a and 34a on the same side and then bend them so that they face each other. Bye. Contact members 39a and 39b are provided on both upper and lower surfaces of the movable contact spring 39 at positions corresponding to the contact members 33a and 34a, respectively.
is fixed.

The fitting hole 25 of the insulating member 26 is formed at the base of a protrusion 40 that protrudes from approximately the center of the surface 26b opposite to the terminal protrusion surface. In order to strongly hold the convex portion 23 of the fitted yoke 22, the upper edge 25a of the fitting hole 25 is bulged downward in an arc shape, and the elasticity of the upper edge 25a causes the convex portion 23 to be held firmly. Part 2
Hold 3 firmly.

A nearly L-shaped armature 4 is attached to the lower corner of the yoke 22.
1. A substantially L-shaped hinge spring 42 is superimposed on the lower side thereof, and in this state, the fitting holes 25, 25 of the insulating members 26, 26 are pressed from both sides of the yoke 22, and the protrusions 23, 23 are fitted. It's crowded. Therefore, as shown in FIG. 9, the end 41a of the armature 41 is located above the movable contact spring 39. When the coil of the electromagnet is energized and attracted to the iron core 21a, the armature 41 presses the movable contact spring 39 downward.
As a result, the contact member 39b of the movable contact spring 39 comes into contact with the contact member 34a of the lower fixed contact plate piece 34. In this way, the contacts are switched.

In this way, the electromagnetic block 20 is held between the pair of contact blocks 24, 24 from both sides, and covered from above with a hollow rectangular cover 43 with an open bottom.

The rectangular flat bottom cover 44 has terminal holes 45 to 48 through which the terminals 27 to 30 pass. If the terminals 27 to 30 are pushed through the lower side of the cover 43 to the terminal protruding surface 26a of the insulating member 26, the opening of the cover 43 is closed. The bottom cover 44 is fixed to the cover 43 by applying an adhesive to the peripheral edge of the bottom cover 44.

As explained above, in the contact block according to the present invention, since the contact plate pieces protrude to opposite sides of the insulating member, the contacts can be attached from the same side. Therefore, unlike in the case of conventional contact blocks, it is no longer necessary to attach the contacts to one contact plate, then turn the contact block over and attach the contacts to the other contact plate, which reduces the contact installation work. becomes easier. Further, since the contact plate piece can be bent along the notch provided in the insulating member, the bending operation becomes easy.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a small electromagnetic relay using a conventional contact block, Figs. 2 to 4 show conventional contact blocks, Fig. 2 is a perspective view of the contact block before processing, and Fig. 3 is a sectional view of Fig. 2, Fig. 4 is a perspective view of the contact block after processing, Fig. 5 is an exploded perspective view showing an example of a small electromagnetic relay using this contact block, and Figs. 6 to 9 are views of this invention. 6 shows a perspective view of the contact block before processing, and FIG. 7 shows a side view thereof.
Fig. 8 is a sectional view taken along line A-A in Fig. 6, Fig. 9 is a side view of the contact block showing the relationship between the armature and the movable contact spring, and Fig. 10 is a small electromagnetic device using the contact block of this embodiment. FIG. 3 is a cross-sectional view of the relay. 20... Electromagnet block, 21... Electromagnet, 2
2... Yoke, 23... Convex portion, 24... Contact block, 25... Fitting hole, 26... Insulating member, 27,
28, 29, 30... terminal, 31... connection piece, 3
2... Pedestal piece, 33... Fixed contact plate piece, 33a
... Contact member, 34 ... Fixed contact plate piece, 34a
... Contact member, 35, 36, 37, 38 ... Notch, 39 ... Movable contact spring, 39a ... Contact member, 39b ... Contact member, 40 ... Projection, 41
... Armature, 42 ... Hinge spring, 43 ... Cover, 44 ... Bottom cover, 45, 46, 47, 48 ...
terminal hole.

Claims (1)

[Claims] 1 A plurality of terminals protrude from one side of a substantially rectangular insulating member, and one of a pair of contact plate pieces extending from the terminal extends from the terminal protruding surface of the insulating member. the other contact plate protrudes from the opposite surface of the terminal protruding surface of the insulating member, and the pair of contact plate pieces are bent so as to face each other on a surface adjacent to the terminal protruding surface. Relay contact block.