JPH0619250U - Small relay - Google Patents

Abstract

(57) [Abstract] [Purpose] To stabilize the rotation of the card of a small relay and to bring the movable contact and the fixed contact into contact accurately. [Structure] Fixed contact piece 2 is attached to base 21 made of resin or the like.
2 and the movable contact piece 23 are erected, the coil 27 is energized and the armature 28 is rotated to rotate the card 30 in association with the rotation of the armature 28. A protrusion 32 is provided at a pivoting fulcrum of a card 30 of the small relay 10 that presses the movable contact piece 23 so that the movable contact 25 of the movable contact piece 23 can contact the fixed contact 24 of the fixed contact piece 22. The protrusion 32 is attached to the base 21 and the like.
A hole 33 that engages with is formed so that the card 30 can be supported.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small relay, and more particularly to a small relay that improves product quality.

[0002]

[Prior art]

 Conventionally, this type of small relay will be described with reference to FIG. This figure is a side view of the small relay 1, in which a fixed contact piece 3 is erected on the front part of the base 2. Further, a movable contact piece 4 is erected so as to face the fixed contact piece 3, and a fixed contact 5 mounted on the fixed contact piece 3 faces a movable contact 6 of the movable contact piece 4.

Further, a coil 8 fixed to the yoke 7 is mounted on the rear side of the base 2, and a center portion of a dogleg-shaped armature 9 is supported on an upper end portion of the yoke 7. Further, a card 10 is arranged between the armature 9 and the movable contact piece 4 so that the rotation of the armature 10 can be transmitted to the card 10. The upper end of the card 10 is connected to the upper end of the movable contact piece 4.

When the coil 8 is energized, the upper piece 9a of the armature 9 is attracted to the core 11 of the coil 8 and the armature 9 rotates. Then, the vertical piece 9b of the amateur 9 rotates the card 10. Therefore, the card 10 rotates about the base as a fulcrum to press the movable contact piece 4 forward, and the movable contact 6 of the movable contact piece 4 contacts the fixed contact 5 of the fixed contact piece 3.

[0005]

[Problems to be solved by the device]

 As described above, the conventional small relay is configured so that the card is interlocked with the rotation of the armature and the movable contact piece is pressed to bring the movable contact into contact with the fixed contact. However, the base of the card may be misaligned during rotation, and in such a case, the pressing of the movable contact piece becomes unstable, resulting in contact failure between the movable contact and the fixed contact. Sometimes it caused problems.

Therefore, there arises a technical problem to be solved in order to prevent the displacement of the pivot of the card so that the movable contact can be accurately brought into contact with the fixed contact, and the present invention solves the problem. The purpose is to resolve.

[0007]

[Means for Solving the Problems]

 This invention was proposed to achieve the above-mentioned object, and a fixed contact piece and a movable contact piece are erected on a base made of resin or the like, and a coil is energized to rotate an armature. A small relay in which a card is rotated in association with the rotation of the amateur, and the movable contact piece is pressed by the rotation of the card so that the movable contact of the movable contact piece can contact the fixed contact of the fixed contact piece. A small relay which is characterized in that a protrusion is provided at a pivotal fulcrum of the card, and a hole engaging with the protrusion is formed in the base or the like so that the card can be supported. Is.

[0008]

[Action]

 According to this invention, a protrusion is provided at a rotation fulcrum of a card that rotates in association with rotation of an amateur and presses a movable contact piece, and the protrusion can be engaged with a hole formed in a base or the like. With this configuration, the pivotal fulcrum of the card is not displaced, and the movable contact can be reliably brought into contact with the fixed contact in conjunction with the pivotal movement of the armature.

[0009]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In the figure, reference numeral 20 is a small relay, and as shown in FIG. 1, a fixed contact piece 22 is provided upright on the front portion (left side portion in the figure) of a base 21. A movable contact piece 23 is erected upright behind the fixed contact piece 22 so as to face the fixed contact piece 22, and the fixed contact 24 and the movable contact piece 23 mounted on the tip of the fixed contact piece 22 are separated from each other. It faces the movable contact 25 provided at the central portion.

A coil 27 fixed to a yoke 26 is mounted on the rear portion of the base 21, and a central portion of a dogleg-shaped armature 28 is supported on an upper end portion of the yoke 26. The upper piece 28a of the armature 28 extends above the core 29 of the coil 27. Further, a card 30 is arranged between the vertical piece 28b of the amateur 28 and the movable contact piece 23.

A pressing portion 31 is provided on the back surface of the card 30, and the pressing portion 31 is connected to the lower end portion of the vertical piece 28 b of the armature 28. On the other hand, the upper end of the card 30 extends upward and is connected to the upper end of the movable contact piece 23. Further, as shown in FIGS. 1 to 3, protrusions 32, 32 are formed on the pivot of the card 30, that is, on both sides of the lower end of the card 30.

Further, in the base 21, holes 33, 33 that engage with the protrusions 32, 32 are opened at the lower end portion of the card 30, and the protrusions 32, 32 and the hole 33. , 33 support the card 30 rotatably. Further, an inverted U-shaped notch 34 is formed in the lower portion of the card 30 to give elastic force to the protrusions 32, 32. Therefore, the card 30 can be easily attached to the base 21, and the protrusions 32, 32 of the card 30 and the holes 33, 33 of the base 21 are not disengaged from each other.

When the coil 27 is energized, as shown in FIG. 4, the upper piece 28a of the armature 28 is attracted to the core 29, and the armature 28 rotates clockwise in the figure. Therefore, the vertical piece 28b of the amateur 28 presses the card 30, and the card 30 rotates in the direction of arrow X, that is, forward with the lower end portion as a fulcrum. The movable contact piece 23 has its upper end pressed by the card 30 and rotates forward, so that the movable contact 25 comes into contact with the fixed contact 24. At this time, the protrusions 32, 32 formed on both sides of the lower end of the card 30 are engaged with the holes 33, 33 opened in the base 21, so that the rotation fulcrum of the card 30 is not displaced. Instead, the card 30 surely transmits the rotation of the armature 28 to the movable contact piece 23 to accurately bring the movable contact 25 into contact with the fixed contact 24.

When the coil 27 is de-energized, the pressing of the armature 28 is released, and the elastic force of the movable contact piece 23 causes the movable contact piece 23, the movable contact piece 23, and the armature 28 to return to their original postures. Return. It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified version.

[0015]

[Effect of device]

 As described in detail in the above one embodiment, the present invention forms a protrusion at the pivot of a card of a small relay, and engages the protrusion with a hole in a base or the like to pivot when the card is pivoted. It prevents the fulcrum from shifting. Therefore, the rotation of the card is stable, the rotation of the armature is surely transmitted to the movable contact piece, and the movable contact and the fixed contact are accurately brought into contact with each other, so that the quality of the small relay can be improved. It is a device with practical value.

[Brief description of drawings]

FIG. 1 is a side view of a small relay.

FIG. 2 is a partially cutaway front view showing engagement between a protrusion of a card and a hole of a base.

FIG. 3 is a partially cutaway side view showing engagement between a protrusion of a card and a hole of a base.

FIG. 4 is a side view of the small relay in which the movable contact is in contact with the fixed contact.

FIG. 5 is a side view of a small relay showing a conventional example.

[Explanation of symbols]

 20 small relay 21 base 22 fixed contact piece 23 movable contact piece 24 fixed contact point 25 movable contact point 27 coil 28 amateur 30 card 32 projecting portion 33 hole

Claims (1)

[Scope of utility model registration request] 1. A fixed contact piece and a movable contact piece are erected on a base made of resin or the like, and a coil is energized to rotate the armature, thereby rotating the card in association with the rotation of the armature. A small relay that is moved so that the movable contact piece is pressed by the rotation of the card to bring the movable contact of the movable contact piece into contact with the fixed contact of the fixed contact piece, and a protrusion is provided at the rotation fulcrum of the card. A small relay, characterized in that a hole that engages with the protrusion is formed in the base or the like so that the card can be supported.