JPH07320619A - Installation method of card in contact point spring of relay - Google Patents

Abstract

PURPOSE:To prevent a card from being shaved and prevent contact point defects due to production of chips at the time when a pair of pinching grooves formed in the card are fitted with a pair of contact point springs and they are joined. CONSTITUTION:It is related to a method to install a card 2 having a pair of pinching grooves 1a, 1b in a pair of contact point springs 3b. At first, one pinching groove 1a of the card 2 is engaged with one contact point spring and at the same time the starting of the other pinching groove 1b is set at the upper end of the other contact point spring 3b. Then, vibration is applied to the latter contact point spring 3b to fit the latter pinching groove 1b in the latter contact point spring 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for mounting a card on a contact spring in a relay.

[0002]

2. Description of the Related Art In assembling a conventional relay,
As shown in FIG. 5, with the movable iron core 12 and the card 2 incorporated in the coil bobbin 11, the movable contact side terminal 6, the fixed contact side terminal 7, the coil terminal 8 and other terminals, the contact springs 3a, 3
b, the relay was assembled as shown in FIG. 6 by inserting it into the base block 10 incorporating a permanent magnet and the like. This assembling work is performed manually. Then, when the coil bobbin 11 is inserted into the base block 10, at the same time, the pair of holding grooves 1a and 1b provided in the card 2 are fitted and engaged with the pair of contact springs 3a and 3b.

As described above, in the conventional case, the pair of holding grooves 1a and 1b provided in the card 2 at the same time when the coil bobbin 11 is assembled to the base block 10 are fitted and engaged with the pair of contact springs 3a and 3b. However, since the assembly is complicated, automation cannot be performed and the above work is a manual work. In this case, when the pair of holding grooves 1a and 1b provided on the card 2 are fitted into and engaged with the pair of contact springs 3a and 3b, the card 2 formed of a synthetic resin molded product has the contact spring 3a, 3b, scraping powder of a synthetic resin molded product was generated, which was a cause of contact failure of the contacts.

As shown in FIG. 7, this is the width of the pair of holding grooves 1a and 1b provided in the card 2 and the contact springs 3a and 3b.
Due to a dimensional error with respect to b or an error between dimensions a and b in FIG. 7, a synthetic resin is molded when the pair of holding grooves 1a and 1b of the card 2 are fitted into and engaged with the pair of contact springs 3a and 3b. The card 2 made of a product can be scraped. A in FIG. 6 indicates a portion where the scraping of the card 2 occurs.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to make a pair of holding grooves provided in a card into a pair of contact springs. It is an object of the present invention to provide a method for attaching a card to a contact spring in a relay, which can prevent the card from being scraped when it is fitted and engaged and can prevent contact failure due to generation of scraped powder.

[0006]

In order to solve the problems of the above-mentioned conventional examples and to achieve the object of the present invention, the method of attaching the card to the contact spring in the relay of the present invention is a pair of holding grooves 1a, 1b. A card 2 having a pair of contact springs 3a,
One of the holding grooves 1a of the card 2 for mounting on the card 3b
With one of the contact springs 3a and the other holding groove 1
The inlet of b is located at the upper end of the other contact spring 3b, and then the other contact spring 3b is vibrated to fit the other holding groove 3b into the other contact spring 3b.

Further, it is preferable that the other contact spring 3b into which the other holding groove 1b is fitted by applying vibration is a normally open contact spring.

[0008]

In the present invention having the above construction, however, one holding groove 1a of the card 2 is connected to one contact spring 3a.
And the inlet of the other holding groove 1b is located at the upper end of the other contact spring 3b, and then the other contact spring 3b is vibrated to fit the other holding groove 3b into the other contact spring 3b. Therefore, the one holding groove 1a is connected to the one contact spring 3
When it is fitted in and engaged with a, the other holding groove 1b and the other contact spring 3b can be simply and accurately engaged without being affected, and the one holding groove 1a of the card 2 made of a molded product can be engaged. The side wall on the side is not shaved, and when the one holding groove 1a is engaged with the one contact spring 3a in this manner, the inlet of the other holding groove 1b is connected to the other contact. The card 2 is positioned at the upper end of the spring 3b, and then the other contact spring 3b is vibrated to fit the other holding groove 3b into the other contact spring 3b, thereby preventing the card 2 from being pressed from above. The other holding groove 3 can be fitted and engaged with the other contact spring 3b by its own weight, and the card 2 can be engaged without being scraped.

If the other contact spring 3b which gives a vibration to which the other holding groove 1b is fitted is a normally open contact spring, the other contact spring 3b which gives a vibration when mounting the card 2 is fixed at the time of assembly. Since the contacts are not in contact with each other, the adhesion phenomenon of the contacts due to vibration can be prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. In the present invention, the contact springs 3a,
3b is attached to the movable contact side terminal 6, the fixed contact side terminal 7,
The coil bobbin 1 and the base block 10 in which the coil terminal 8 is implanted in the base 5 and the yoke 9 and the permanent magnet are attached.
1. Prepare the movable iron core 12 and the card 2. Here, the base block 10 is provided with a pair of contact springs 3a and 3b facing each other, one contact spring 3a being a normally closed contact spring and the other contact spring 3b being a normally open contact spring. Also,
The card 2 is formed with a pair of holding grooves 1a, 1b cut from both sides from below, and a movable iron core insertion hole 13 is formed in the center.
Is provided.

The base block 10, the coil bobbin 11, the movable iron core 12, and the card 2 are assembled to form a relay in the following manner. First, the card 2 is attached to the pair of contact springs 3a and 3b provided on the base block 10 as shown by arrows in FIG. In this case, the card 2 is shown in FIGS. 2 (a) (b) (c).
Install in the order of (d). That is, the card 2 is arranged above the pair of contact springs 3a and 3b as shown in FIG. Next, as shown in FIG. 2B, one holding groove 1a of the card 2 is engaged with one contact spring 3a, and the inlet of the other holding groove 1b is positioned at the upper end of the other contact spring 3b (card. 2 stage of temporary installation). In this case, both holding grooves 1a and 1b are simultaneously connected to the pair of contact springs 3a and 3b.
First, one of the holding grooves 1
Since "a" is fitted into and engaged with one of the contact springs 3a, the one holding groove 1a can be fitted into and engaged with the one of the contact springs 3a easily and reliably, and the card 2 made of synthetic resin is used.
Is fitted by the contact spring without being scraped. Next, as shown in FIG. 2C, the other contact spring 3b is vibrated by the vibration imparting means 15, and the other holding groove 1b is fitted and engaged with the other contact spring 3b by the weight of the card 2 (FIG. 2). (D)). In this case, high frequency is preferable as the applied vibration. Here, the other contact spring 3b that gives vibration is a normally open contact spring as described above. Therefore, even if a high frequency vibration is given, it does not come into contact with the fixed contact so that the contact phenomenon does not occur. ing.

After the card 2 is permanently attached to the pair of contact springs 3a and 3b as described above, the coil bobbin 11 is inserted and attached to the base block 10 as shown by the arrow in FIG. Next, the movable iron core 12 is inserted into the hole 16 of the coil bobbin 11 as shown by the arrow in FIG. In this case, the tip of the movable iron core 12 is inserted into the movable iron core insertion hole 13 of the card 2.

The relay is assembled as described above. The assembly is such that the card 2 is inserted into the base block 10, the coil bobbin 11 is inserted into the base block 10, and the movable iron core 12 is attached to the coil bobbin 11. Since it is a method of assembling parts one by one like insertion and assembly, automatic assembly is possible.

FIG. 4 shows a principle diagram of the relay assembled as described above. The movable iron core 12 is rotated by changing the direction of the current flowing through the coil 17 wound around the coil bobbin 11. As a result, the card 2 is moved, and the contact springs 3a and 3b are moved by the card 2 to switch the contacts. In the figure, 18 is a permanent magnet.

[0015]

As described above, according to the first aspect of the present invention, when a card having a pair of holding grooves is attached to a pair of contact springs, one holding groove of the card is connected to one contact. Since it engages with the spring and the inlet of the other holding groove is located at the upper end of the other contact spring, and then the other contact spring is vibrated to fit the other holding groove into the other contact spring, When the holding groove is fitted into and engaged with one of the contact springs, it can be easily and accurately engaged without being affected by the other holding groove and the other contact spring, and is made of a synthetic resin molded product. One side of the card on the side of the holding groove is not shaved, and when the one holding groove is engaged with one of the contact springs in this way, the inlet of the other holding groove is connected to the other contact spring. Position it at the upper end, then apply vibration to the other contact spring Since the holding groove is fitted into the other contact spring, the other holding groove can be fitted into and engaged with the other contact spring by the weight of the card without giving a load to push the card from above, and therefore, a synthetic resin molded product. The side wall of the other holding groove of the card made of is not scraped, and as a result, when mounting the card, the synthetic resin card is not scraped and shavings are not generated,
It is possible to prevent contact failure due to shavings.

In addition to the effect of the invention described in claim 1, the other contact spring into which the other clamping groove is fitted by vibrating is a normally open contact spring. Therefore, since the other contact spring, which gives vibration when mounting the card, does not contact the fixed contact at the time of assembly, it is possible to prevent the adhesion phenomenon of the contact due to vibration from occurring.

[Brief description of drawings]

FIG. 1 is a view showing mounting of a card on a base block of the present invention,
FIG. 7 is an exploded perspective view for explaining the order of attaching the coil bobbins.

2 (a), (b), (c), and (d) are explanatory views showing an order in which a pair of holding grooves provided on a card are fitted into and engaged with a pair of contact springs.

FIG. 3 is an explanatory diagram showing how a movable iron core is incorporated into a coil block.

FIG. 4 is a diagram showing the principle of operation of the relay of the present invention.

FIG. 5 is an exploded perspective view showing a state where a movable iron core and a card are attached to a coil bobbin of a conventional example, which is incorporated in a base block.

FIG. 6 is an overall perspective view after assembly of the above.

FIG. 7 is an explanatory view showing a dimensional relationship between a pair of holding grooves and a pair of contact springs provided in the card above.

[Explanation of symbols]

 1a Holding groove 1b Holding groove 2 Card 3a Contact spring 3b Contact spring

Claims (2)

[Claims] 1. When attaching a card having a pair of holding grooves to a pair of contact springs, one holding groove of the card is engaged with one of the contact springs, and the inlet of the other holding groove is at the upper end of the other contact spring. And then applying vibration to the other contact spring so that the other holding groove is fitted into the other contact spring, the method for mounting the card on the contact spring in the relay. 2. The method of mounting a card on a contact spring in a relay according to claim 1, wherein the other contact spring into which the other sandwiching groove is fitted by vibrating is a normally open contact spring.