JPH046250B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnetic relay.

Conventionally, as shown in FIG. 1, an electromagnetic relay has a bobbin 1 wound with wire, an iron core 9 passing through the bobbin 1, and an L-shaped yoke 8 with the iron core 9 fitted at the bottom. , a armature 11 having one end in contact with the upper end of the yoke 8, and a protrusion 1 of the armature 11.
1b and the protrusion 8b of the yoke 8, the contact spring 10 has a bent portion 10e with the common contacts 10c and 10c' fixed to the tips, and the common contact 1
Break contact 2c provided opposite to 0c'
and a make contact 3c provided to face the common contact 10c. At this time, the break contact 2c and the make contact 3c are supported by the break contact terminal 2 and the make contact terminal 3, respectively. Conventionally, this type of support structure has a rectangular structure as shown in FIG. The shaped leaf springs are bent twice to form a break contact terminal 22 and a make contact terminal 23, respectively, and the break contact terminal 22 and the make contact terminal 23 are fixed to the mold 21 with rivets 24 and 25, respectively, to form a break contact 22c and a make contact. 23c are fixed to opposite ends of the break contact terminal 22 and the make contact terminal 23, respectively.

FIG. 3 shows an example of the configuration of a conventional electromagnetic relay.
The bobbin upper part 41b also serves as the mold for fixing the contact terminal in FIG.
It is integrated with a. 49 is an iron core, 48 is a yoke, 51 is an armature, and 50s is a contact spring, each of which is constructed as shown in FIG. Break contact terminal 42 and make contact terminal 43
A break contact 42c and a make contact 43c are respectively fixed to the tip portions thereof so as to face the common contact 50c, and are fixed to the bobbin upper part 41b by rivets 54 and 55, respectively. 44a is a coil terminal, which is soldered to one end of the wire 47l. With the support structure described above, the number of parts increases, and the contact terminals are inserted in two directions, resulting in poor manufacturability. Furthermore, since the contact terminal is formed by bending a rectangular leaf spring, the contact gap accuracy is reduced and the contact force on the break side is weak. Furthermore, due to the heat generated by the make contact, organic gas is generated from the mold near the make contact, resulting in a lack of contact reliability.

An object of the present invention is to solve the above problems by integrally press-forming a break contact terminal and a make contact terminal, and at the same time press-fitting the contact terminal with the break contact and make contact fixed by caulking (clud) into a bobbin. The objective is to provide an electromagnetic relay that can

The present invention has a bobbin in which one end side of a flange provided at both ends of a coil winding portion through which an iron core is passed is a contact terminal support, and a break contact terminal and a make contact terminal are each fixed to the contact terminal support. In an electromagnetic relay that sets a gap between fixed contacts, the break contact terminal and the make contact terminal to which the contact members are caulked and fixed are formed by integral press molding, and the fixed contact is adjacent to at least one of these two contact terminals. The plate-shaped heat dissipating part is integrally press-molded, and the contact terminal is oriented in a direction parallel to the plate thickness direction so that a portion of the caulked contact member that is equivalent to the side surface of the contact terminal is used as a fixed contact surface. It is characterized in that it is press-fitted and fixed to the bobbin at the same time.

Next, embodiments of the present invention will be described with reference to the drawings.

Fig. 4a is a perspective view showing one embodiment of the contact terminal used in the present invention, Fig. 4b is a front view showing a part of the hoop material or standard length during press working of the contact terminal, and Fig. 5 is a perspective view showing an embodiment of the contact terminal used in the present invention. 1 is a perspective view showing an example of the configuration of an electromagnetic relay according to the present invention.

First, the contact terminal used in the present invention will be explained with reference to FIGS. 4a and 4b.
The break contact terminal 62 and the make contact terminal 63 are connected by a connecting part 70, and a metal plate is pressed together to obtain a hoop material or a fixed length as shown in FIG. 4b, and the break contact 62c and the make contact 63c are respectively The break contact terminal 62 and the make contact terminal 63 are caulked and fixed at predetermined positions. Break contact terminal 6
2 is provided with a notch 62r and a protrusion 62s for fixing to the bobbin, and the make contact terminal 63 is similarly provided with a notch 63r. When inserting the bobbin, the protrusions 62f and 63f for bobbin fitting are provided.
The small pieces 62p and 63p are cut off or bent, leaving the break terminal 62t and the make terminal 63t connected to the connecting portion 70.

Further, the make contact terminal 63 includes a heat sink (heat dissipation part) 63h for heat dissipation below the fixed portion of the make contact 63c. This heat sink can be used not only for the make contact terminal, but also for the break contact side or both contact sides.

Next, a configuration example of an electromagnetic relay according to the present invention will be described with reference to FIG. The contact terminal used in FIG. 5 is the same as the contact terminal shown in FIG. 4a, and the reference numerals used in the explanation are also the same as those in FIG. 4a. Also, iron core 109, yoke 108, armature 111, contact spring 110s, common contact 110c, coil 10
7. The wire 107l and the coil terminal 104a are constructed in the same manner as shown in FIG. Support parts 101d and 101b of the break contact terminal 62 and the make contact terminal 63 respectively protrude from the upper part of the bobbin 101 in parallel to the left and right, and there is no mold connecting the two at the ends. Support parts 101d, 101
Protrusions 142 and 143 are provided at the ends of b so that the notches 62r and 63r of the break contact terminal and the make contact terminal fit into each other, respectively, and fix the respective contact terminals. Bobbin bottom 10
1a are convex portions 62f and 63 of both contact terminals.
recessed portions 132f provided to fit the respective portions f;
133f, break terminal 62t and make terminal 6
Cut grooves 132t and 133t to insert 3t, respectively.
Equipped with. As described above, the contact terminals 62 and 63 are integrally press-fitted into the bobbin 101 to a predetermined position while being connected by the connecting portion 70, and are pressed into the bobbin 101 by the protrusions 142 and 1 provided on the bobbin support portions 101b and 101d.
43. The protrusion 62s provided on the break contact terminal 62 is applied to the lower end of the bobbin 101 to suppress displacement of the break contact terminal in the vertical direction. The connecting portion 70 is cut after the contact terminal is fixed, thus configuring the electromagnetic relay according to the present invention.

As explained above, in the present invention, since the break contact terminal and the make contact terminal are integrally press-fitted into the coil bobbin while connected, the contact gap accuracy can be easily improved, and the press-fitting direction is also unidirectional, so assembly is easy and manufacturing is easy. Excellent in sex.

Further, according to the present invention, since there is no mold member near the contact member, the influence of organic gas due to heat generation can be removed and reliability is improved. Furthermore, since the contact terminal has a heat sink structure,
It is possible to provide a cooling effect against the heat generated due to the opening and closing of the contacts.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of the configuration of a conventional electromagnetic relay, FIG. 2 is a front view showing a support structure of a conventional contact terminal, and FIG. 3 is a perspective view showing an example of the configuration of a conventional electromagnetic relay. FIGS. 4a and 4b are a perspective view and a front view showing an embodiment of a contact terminal used in the present invention, and FIG. 5 is a perspective view showing an embodiment of an electromagnetic relay according to the present invention. 109... iron core, 108... yoke, 111...
Armature, 101...Bobbin, 110s...
Contact spring, 110c...Common contact, 62...Break contact terminal, 63...Make contact terminal, 62c...Break contact, 63c...Make contact, 311...Heat sink.

Claims (1)

[Scope of Claims] 1. A bobbin with one end side of a flange provided at both ends of a coil winding portion through which an iron core is passed as a contact terminal support, and a break contact terminal and a make contact terminal each supported by the contact terminal. In an electromagnetic relay in which a gap is set between fixed contacts by fixing the contact member to the fixed contact terminal, the break contact terminal and the make contact terminal to which the contact member is caulked and fixed are formed by integral press molding, and the fixed contact terminal is fixed to at least one of these two contact terminals. A plate-shaped heat dissipating part adjacent to the contact is integrally press-molded, and the contact terminal is parallel to the plate thickness direction so that a portion of the caulked contact member corresponding to the side surface of the contact terminal is used as a fixed contact surface. An electromagnetic relay characterized in that the electromagnetic relay is press-fitted into the bobbin from both directions at the same time.