JPS6230767Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] This invention relates to a small electromagnetic relay mounted on, for example, a printed wiring board.

[Prior art and its problems] This type of electromagnetic relay consists of a terminal base, an armature and an electromagnetic block set on the terminal base, a case attached to the upper side of the terminal base to cover the armature and electromagnet block, and a terminal. It consists of a bottom plate attached to the underside of the base.

In the electromagnetic relay, first, the armature and the electromagnetic block are housed in the recess of the terminal base in this order from above the terminal base. At this time, the bearing formed on the flange of the spool of the electromagnetic block engages with the rotating shaft formed on the frame of the armature, and the armature is supported rotatably around the rotating shaft. Ru. The electromagnetic block is integrally fixed to the terminal base by fixing the flange of the spool to the terminal base by heat fusion.

Next, the lead wire of the coil wound around the spool is passed along the upper surface of the flange of the spool, and then connected to the coil terminal protruding from the terminal base. This connection is made by winding the lead wire around the coil terminal several times and then soldering it.

Thereafter, the case is attached from above the terminal base, the bottom plate is attached from below the terminal base, and the joint surface between the case and the bottom plate is sealed with a resin such as epoxy to complete the assembly.

By the way, as mentioned above, the lead wire of the coil wound around the spool is connected to the inner end of the coil terminal protruding from the terminal base after the armature or electromagnet block is assembled into the terminal base. When winding, the wire gets entangled with surrounding members and breaks, so it has the disadvantage that assembly work cannot be automated.

[Purpose of the invention] This invention was made in order to eliminate the above-mentioned conventional drawbacks, and aims to provide a highly reliable electromagnetic relay in which the coil lead wire is not disconnected.

[Structure and effect of the invention] This invention temporarily fixes the tip of the lead wire of the coil to the flange of the spool, and inserts the inner end of the coil terminal into the flange of the spool while being positioned on the lead wire. A terminal lead-out hole is formed in the coil terminal, and the lead wire is inserted into a notch formed in the inner end of the coil terminal, and the inner end of the coil terminal and the lead wire are electrically connected. Features.

According to this invention, the coil lead wire is temporarily fixed to the flange of the spool, so when the armature and electromagnet block are stored in the recess of the terminal base, there is no risk that the lead wire may become entangled with surrounding members and break. do not have.

Further, the temporary fixing of the coil lead wire can be carried out using the electromagnetic block itself and is not affected by other armatures or the terminal base, so the temporary fixing work of the lead wire is easy.

Furthermore, the electrical connection between the inner end of the coil terminal and the lead wire is achieved by inserting the inner end of the coil terminal into the terminal lead-out hole formed in the flange of the terminal base, and inserting the lead wire into the notch. This is achieved by only brazing after the is inserted.
The connection work is easy.

[Description of Embodiments] FIG. 1 is an exploded perspective view showing an example of an electromagnetic relay according to this invention. This electromagnetic relay consists of a terminal base 1, an armature 12 and an electromagnetic block 15 that are set on the terminal base 1, and a case 31 that is attached to the upper side of the terminal base 1 and covers the armature 12 and the electromagnet block 15 (see FIG. ) and a bottom plate 3 attached to the underside of the terminal base 1.
It is composed of 2.

The terminal base 1 is made of synthetic resin, and a plurality of terminals 6 are fixedly installed in two rows in a rectangular frame part 9 by insert molding. At one inner end of
As shown in FIG. 7, movable contact pieces 33 are arranged in series, and a movable contact 34 set at the free end of the movable contact piece 33 is connected to a fixed contact 34 set at the tip of the other terminal 6. is facing. Further, the inner ends 2a, 3a of the coil terminals 2, 3 protrude from the upper end surface of the square-shaped frame 9 constituting the terminal base 1, and U-shaped notches are formed in the inner ends 2a, 3a. A portion 7 is formed.

The armature 12 has a square shape, and movable iron pieces 36 are arranged on two opposing sides, and these movable iron pieces 36 are inserted into a frame 37 made of synthetic resin, leaving both ends intact. It is fixed integrally. Rotating shaft portions 38 are integrally provided at both ends of the frame body 37, and an operating piece 39 is integrally formed to protrude from the lower surface.

The electromagnetic block 15 has a fixed iron core 40 integrally fixed to a spool 41 by insert molding, and a coil 17 is wound around the outer periphery of the spool 41.

Further, the left and right flanges 18 of the terminal base 1 are formed with terminal lead-out holes 19 through which the inner ends 2a and 3a of the coil terminals 2 and 3 are inserted, and furthermore, a pin 21 is formed in the left and right flanges 18 of the terminal base 1. It is installed protrudingly.

In this example, the coil terminals 2 and 3 are provided on the left and right flanges 18 of the terminal base 1, respectively, so that the electromagnetic block 15 can be shared even when the coil 17 is a double coil. Also, spool 41
An inverted U-shaped bearing portion 16 is provided on both end surfaces of the flange portion 18.
are integrally formed.

Bearing portions 16 are provided on two opposing sides of the terminal base 1.
A fitting groove 10 into which the fitting groove 10 is fitted, and a support recess 11 of the shaft portion 38 continuous to the lower side of the fitting groove 10 are formed.

The case 31 is made of synthetic resin and has a box shape, and its opening has teeth that fit into the lead-out portions of the terminals 6 when the case 31 is attached to the terminal base 1.
The bottom plate 32 is also made of synthetic resin like the case 1, and has teeth that fit into the lead-out portions of the terminals 6.

The electromagnetic relay having the above structure is assembled in the following manner.

First, as shown in FIG. 2, the lead wire 20 of the coil 17 wound around the spool 41 is wound around the pin 21 protruding from the collar 18 of the spool 41 and temporarily fixed. At this time, as shown in FIG. 5, the tip 20a of the lead wire 20 of the coil 17 may be fixed to the upper surface of the flange 18 of the spool 41 with an adhesive 32.

Next, the armature 12 and the electromagnetic block 15 are housed in the recess of the terminal base 1 in this order from the upper side of the terminal base 1. At this time, the inner ends 2a and 3a of the coil terminals 2 and 3 are inserted into the terminal lead-out holes 19 formed in the left and right flanges 18 of the terminal base 1.
At the same time, as shown in FIG. 3, the lead wire 20 is inserted into the notch 7.

Furthermore, the bearing portion 16 formed on the collar portion 18 of the spool 41 constituting the electromagnetic block 15 is
The armature 12 engages with the rotating shaft portion 38 formed in the frame 37 of the armature 12, and the armature 12 is connected to the support recess 11 formed in the terminal base 1 and the bearing portion 16.
It is rotatably held around a rotating shaft portion 38 supported by.

The electromagnetic block 15 is integrally fixed to the terminal base 1 by fixing the flange 18 of the spool 41 to the terminal base 1 by heat fusion. Further, as shown in FIG. 4, the inner ends 2a, 3a of the coil terminals 2, 3 and the lead wire 20 are
They are electrically connected by a brazing material 23 such as solder.

Thereafter, the case 31 is attached from above the terminal base 1, and the bottom plate 32 is attached from below the terminal base 1, and the joint surface between the case 31 and the bottom plate 32 is sealed with a resin such as epoxy to complete the assembly.

The electromagnetic relay assembled as described above is
By energizing the coil 17, the amateur 1
2 rotates around a rotating shaft portion 38, and an operating piece 39 provided on the frame of the armature 12 causes the movable contact 34 to come into contact with and separate from the fixed contact 35, thereby opening and closing the contact.

As is clear from the above configuration, first, the lead wire 20 of the coil 17 wound around the spool 41 is
Since it is temporarily fixed to the flange 18 of the spool 41, when the armature 12 and the electromagnetic block 15 are stored in the recess of the terminal base 1 in this order, there is no risk that the lead wire 20 will become entangled with surrounding members and break. .

In addition, the temporary fixing of the lead wire 20 of the coil 17 is as follows:
Since the electromagnetic block 15 itself is sufficient to perform the work and is not affected by other armatures 12 or the terminal base 1, the temporary fixing work of the lead wire 20 is easy and automation can be easily achieved.

Furthermore, the inner ends 2a and 3a of the coil terminals 2 and 3
The electrical connection between the coil terminals 2 and 3 and the lead wire 20 is achieved by inserting the inner ends 2a and 3a of the coil terminals 2 and 3 into the terminal lead-out holes 19 formed in the left and right flanges 18 of the terminal base 1, and After the lead wire 20 is inserted into the portion 7, the connection work is performed only by brazing, so that the connection work is easy, and from this point of view as well, automation of the assembly work can be easily achieved.

In other words, as in the conventional case, the lead wire 20 of the coil 17 wound around the spool 41 is connected to the armature 1.
2 and the electromagnetic block 15 are assembled into the terminal base 1, the above-mentioned lead wire 20 is connected to the inner ends 2a, 3a of the coil terminals 2, 3 protruding from the terminal base 1.
When winding the wire, the lead wire 20 becomes entangled with surrounding members and breaks, making it impossible to automate the assembly work.

However, by adopting the above configuration, there is no disconnection of the lead wire 20, and automation of the assembly work can be easily achieved.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an example of an electromagnetic relay according to this invention, Figs. 2 to 4 are perspective views of main parts for explaining the assembly work of the electromagnetic relay, and Fig. 5
The figure is a perspective view showing another embodiment in which the lead wire is fixed, FIG. 6 is an assembled sectional view of the electromagnetic relay, and FIG. 7 is a sectional view taken along line AA in FIG. 6. 1...Terminal base, 2, 3...Coil, 2a,
3a...inner end, 7...notch, 12...amateur, 15...electromagnetic block, 17...coil, 18...flange, 19...terminal outlet hole, 20...
...Leader line, 20a...Tip, 21...Pin,
24...adhesive, 31...case, 41...spool.

Claims (1)

[Claims for Utility Model Registration] (1) A terminal base, an electromagnetic block fixed on the terminal base, and an electromagnetic block inserted between the terminal base and the electromagnetic block and rotatably supported by the terminal base. The device includes an armature and a case that covers the electromagnetic block, and connects the lead wire of the coil wound around the spool of the electromagnetic block to the coil terminal fixed to the terminal base via the upper surface of the flange of the spool. In an electromagnetic relay that is electrically connected, a lead wire of a coil whose tip is temporarily fixed to the flange of the spool and wound around the spool, and a wire located on the lead wire and attached to the flange of the spool. an inner end portion of the coil terminal, comprising a terminal lead-out hole formed in the coil terminal and into which the inner end portion of the coil terminal is inserted; and a notch portion formed in the inner end portion of the coil terminal and into which the lead wire is inserted; An electromagnetic relay characterized by electrically connecting a lead wire and a lead wire. (2) The electromagnetic relay according to claim 1, wherein the leading end of the coil lead wire is temporarily fixed by winding the lead wire around a pin protruding from the flange of the spool. (3) The tip of the coil lead-out wire is temporarily fixed by fixing the lead-out wire with an adhesive attached to the flange of the spool.
Electromagnetic relay described in section.