JPS6026250B2 - Manufacturing method of electromagnetic relay - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing electromagnetic appliances,
A relay mechanism section 25 consisting of an electromagnet block A and a contact section B is disposed on the base block 4, and the contact spring 13 is brought into contact with a normally closed contact or a normally open contact when the energized pole element 11 is in an energized state or in a non-excited state. In the method for manufacturing an electromagnetic relay in which a lower closed box-shaped case 22 is disposed to cover the relay mechanism section 25, the lower end of the case 22 is brought into vertical contact with the base block 4, 22, and the contact spring 13 for opening and closing the contacts of the relay mechanism section 25 is movable horizontally.
is placed on the base block 4, and when the joint surface between the case 22 and the base block 4 is sealed using ultrasonic waves, the magnetic force of the strong magnet 26 attracts and holds the twill pole 11 at an intermediate position within the swing range. The method for manufacturing an electromagnetic relay is characterized in that the point spring 13 is turned off with a normally closed contact and a normally open contact, and ultrasonic waves are applied in the vertical direction between the case 22 and the base block 4 to form an ultrasonic seal. This is related to.

When cleaning the printed board 24 after mounting electromagnetic relays, semiconductors, etc. on the printed board 24, flux from solder adheres to the solder surface of the electromagnetic relays, semiconductors, etc., and this attached flux is removed. As shown in FIG. 1, the particles entered the electromagnetic relay through the gap between the joint surface of the base block 4 and the case 22, causing contact failure.

Furthermore, in the past, ultrasonic sealing was used to seal the joint surface between the base block 4 and the case 22, but in this conventional ultrasonic sealing method, the normally closed contacts of the relay mechanism section 25 Since the contacts were ultrasonically sealed while closed, there was a drawback that the contact resistance of the contacts increased. In other words, the vibration of the ultrasonic seal is transmitted not only to the joint surface of the base block 4 and the case 22 but also to the normally closed contact, so vibration is generated between the contacts that are in contact at the normally closed contact part, and the vibration is generated between the contacts. Welding occurs, which simultaneously causes peeling, resulting in contact roughness and increased contact resistance of the contacts. Furthermore, with rhodium, which is generally used as a contact material, when high frequency waves are applied, organic gases in the air are adsorbed by its catalytic action, increasing the contact resistance of the contacts. The present invention has been provided in view of the above-mentioned points, and is intended to provide an electromagnetic relay that can be cleaned without flux entering the case after the electromagnetic relay is attached to a printed board. The object of the present invention is to provide a method for manufacturing an electromagnetic relay by ultrasonically sealing the bonding surfaces of the electromagnetic relay without increasing the contact resistance of the contacts.

Examples using the method of the present invention will be described in detail below with reference to the drawings.

First, the structure of an electromagnetic relay will be explained. Figures 2 to 5 and 6 to 9 are 2T type and 4T type, respectively.
1 shows a polarized electromagnetic relay according to an embodiment of the present invention formed as a T-type reed relay. That is, in these embodiments, the electromagnet block A and the contact part B constitute a relay mechanism part, and the electromagnet block A consists of the coils 1 and la wound around the coil bobbin 2, the chokes 8 and 8, and the bushing poles. 11. two yokes 8,8
A permanent magnet 9 bridges the central part of the yoke 8, and magnetic pole faces 10 facing each other and having different polarities are provided at both ends of these yokes 8, 8.
... is formed.

The coil bobbin 2 is formed into a cylindrical shape, and the coils 1 and la are wound thereon. A magnetic armature 11 is inserted into the cylindrical hole of the coil bobbin 2, and both ends of the armature 11 are inserted at both ends of the coil bobbin 2. is the magnetic pole face 10 of the yokes 8, 8...
...is interposed in between. In this way, the bush pole 1 1 is attached to one end (in the case of 2r type) or the middle part in the coil bobbin 2 (
4T type), so that it can rotate horizontally, and the free end is selectively attracted between the magnetic pole faces 10, 10. Here, the coil bobbin 2 is a rainbow type shown in Figs. 2 to 5, or a 4T coil bobbin shown in Figs. 6/9.
It has flanges 5, 5a at both ends and the center (in the case of the 4T type) as in the case of the type, but at this time, the flanges 5 at one end in the case of the 2r type or in the center in the case of the 4T type. The golden part 5 is thick-walled, and the curved side of the lead terminal 6 is integrally embedded and formed by punching into a substantially U-shape as shown in the figure.・・・・・・
Each end of the lead terminal 6 projects outward from the flange 5, with one end 6a of these lead terminals 6 being slightly narrowed, and the flange 5
The protruding dimension from the coil 1, l is shortened and the coil 1,
The other end 6a is wider than the end 6a and protrudes longer from the flange 5, and the end 6b is moved slightly forward or backward as necessary. After being bent, it is press-fitted into the notch 17 at the upper end of the coil terminal 3 as described later. The electromagnet block A formed as described above is used as a base block 4.
A contact spring 13 is disposed above the electromagnetic block A, the substrate is fixed to the COM terminal 12, and the contact spring 13 is disposed on the side of the electromagnet block A in substantially parallel thereto.
... is driven by cards 14, 14 attached to the end of the armature 11, and both NO and NC terminals 15, 13 and the bush point spring 13
The contact is switched and connected at the contact part B, which consists of the . The base block 4 has a coil terminal 3, a COM terminal 12, and an NO terminal 1, as shown in FIGS. 3 and 7, respectively.
5. It is made of a synthetic resin molded product with an NC terminal 16 installed in a through-hole, and the base end of the contact spring 13 is attached to the upper end of the COM terminal 12 in advance, and the contact part B is attached together with N○ and NC terminals 15 and 16. is configured. On the other hand, the center position between the contact portions B arranged on both sides of the base block 4 is the arrangement position of the electromagnet block A, and the base protrudes integrally from the bottom surface of the base block 4. A concave portion is formed on the opposing surface of the protruding base portion, and one end (in the case of 2T type) or both ends (4
In the case of the T type), a positioning convex piece 23 having a medium dimension matching the spacing between the magnetic pole faces 10, 10 is formed to protrude upward. Thus base block 4
When placing the electromagnet block A on top, the locking tongues projecting downward from the flanges 5, 5a or 5a, 5a at both ends of the coil bobbin 2 are iron-fitted from above into the recesses on the surface facing the protrusion. As a result, the electromagnet is pushed against the base block 4.

This is for positioning and fixing the coil bobbin 2 of Tsuk A, and at this time, the positioning protrusion 23 is iron-fitted between the ends of the yokes 8, 8, and the distance between the magnetic pole faces 10, 10 is set to the positioning protrusion 23. It will be regulated to the medium size of .
After the relay mechanism section 25 is disposed on the base block 4 as described above, the case 22 is disposed on the base block 4 and ultrasonic sealing is performed.The method will be described below.

First, the lower box-shaped case 22 is placed in a predetermined position so as to cover the relay mechanism section 25, and the open end of the case 22 is vertically abutted on the base flock 4 to arrange the case 22.
The neck spring 13, which opens and closes the contact of the contact part B of the relay mechanism part 25, is arranged so as to be horizontally movable. As shown in FIG. 10, in order to turn off the normally open contacts and normally closed contacts, a strong magnet 26 is placed so that the straw pole 11 is located exactly in the center. As shown in the figure, this magnet 26 has a protrusion 27 with a tapered tip formed on one side thereof to facilitate magnetic retention of the auxiliary pole element 11. When a strong magnet 26 passes through the pivot point of the saddle pole 11 and approaches the saddle pole 11 from the direction x-x parallel to the longitudinal direction of the base flock 4, the force F that tilts the armature 11 in the non-excited state is generated. , an extremely larger force F2 is applied from the strong magnet 26 to the bushing pole 11 (the armature 11 is a permanent magnet and both ends thereof are magnetized), and as shown in FIG. The block 4 is drawn substantially parallel to the longitudinal direction x-x, and the striped armature 11 is held at the center position. Note that when the armature 11 is in the center, the rear point spring 13 is attached to the card 14 attached to the armature 11.
When the armature 11 is in the energized or de-energized state and the armature 11 is fully seated, the bush point spring 13 is pushed. It is designed to touch one of the contacts.
With the contacts turned off, ultrasonic waves are applied in the direction of the arrow as shown in FIG. 11. At this time, the direction in which the ultrasonic waves are applied is perpendicular to the opening and closing direction of the contacts. As described above, the joint surface between the base block 4 and the case 22 is sealed. In order to turn off the contact, the coil 1 may be energized and the magnet 26 may be used to bring the straw pole 11 to the center position. As described above, in the present invention, the case is disposed with the lower closed end of the case vertically abutting on the base flock of the electromagnetic relay, and the contacts for opening and closing the contacts of the relay mechanism are movable horizontally. When the contact is placed on the base block and the joint surface between the case and the base block is sealed using ultrasonic waves, ultrasonic waves are applied in the direction perpendicular to the case and the base block to turn the contact into the OFF state. Since the ultrasonic sealing method is used, the contact resistance of the contacts does not increase and the bonding surface between the case and the base flock can be brought into close contact. Therefore, the ultrasonic sealing method can be automated, and by sealing the joint surface between the base block and the case, flux will not enter the case even if the electromagnetic relay is attached to a printed board and cleaned. This has the effect that no intrusion occurs, and as a result, automatic cleaning becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional electromagnetic relay without ultrasonic sealing, Fig. 2 is an exploded perspective view of an electromagnetic block according to an embodiment of the present invention in the case of a rainbow type, and Fig. 3 is an exploded perspective view of the same electromagnetic relay. 4 is a perspective view of the same as above, FIG. 5 is a circuit diagram of the same as above, FIG. 6 is an exploded perspective view of an electromagnet block of an embodiment of the present invention in case of 4T type, 8 is a perspective view of the same as the above, FIG. 9 is a circuit diagram of the same as the above, FIG. 10 is an enlarged sectional view of the main part of the relay mechanism section of the embodiment of the present invention, and FIG. 11 is a perspective view of the same as the above in a sealed state. FIG. 12 is an explanatory diagram of the operation of the present invention, and 4 is a base plate. 11 is the support pole, 13 is the contact spring, 22 is the case,
25 is a relay mechanism section, 26 is a strong magnet, A is an electromagnetic block, and B is a contact section. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] 1 A relay mechanism consisting of an electromagnetic block and a contact section is disposed on the base block, and a contact spring is mounted so as to be in contact with a normally closed contact or a normally open contact when the armature is energized or de-energized. In a method of manufacturing an electromagnetic relay in which a box-like case with an opening at the bottom is disposed to cover the relay mechanism, the case is disposed on a base block with the bottom opening of the case perpendicularly abutting the case, and the relay mechanism The contact spring that opens and closes the contact is placed on the base block so that it can move horizontally, and when the contact surface between the case and the base block is sealed with ultrasonic waves, the contact is made by the magnetic force of a strong magnet. The pole is suctioned and held at an intermediate position within the swing range, the contact spring is turned off with the normally closed contact and the normally open contact, and ultrasonic waves are applied in the vertical direction between the case and the base block to create an ultrasonic seal. A manufacturing method for featured electromagnetic relays.