JPH0654181U - Small relay - Google Patents

Abstract

(57) [Abstract] [Purpose] Forcibly separates the movable contact from the fixed contact for the welding of the fixed contact and the movable contact of the small relay. [Structure] A locking portion 20b is provided at the tip of the card 20, and the upper tip 13a of the movable contact piece 13 is locked. Amateur 1
8, a return spring 19 is interposed so that one end 18a of the amateur is separated from the electromagnet 17. The card 20 is returned in conjunction with the separation of the armature 18 from the electromagnet 17, and the movable contact 15 provided on the movable contact piece 13 is fixed.
Away from.

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 operates a movable contact piece by rotating a card.

[0002]

[Prior art]

 FIG. 6 shows a conventional small relay 1, in which a fixed contact piece 3 is erected on a base 2 and a movable contact piece 4 is erected facing the fixed contact piece 3. A fixed contact 5 is provided on the fixed contact piece 3, and a movable contact 6 is provided on the movable contact piece 4 in opposition thereto. A yoke 7 is erected at a substantially central portion of the base 2, and an electromagnet 8 is attached to the yoke 7. An L-shaped armature 9 is supported on the upper end of the yoke 7.

When the electromagnet 8 is excited, one end 9 a of the armature is attracted to the electromagnet 8 and the armature 9 rotates, and the other end 9 b of the armature presses the card 10 to move the card 10 to the movable contact piece 4. Rotate to the side. Therefore, the movable contact piece 4 is pressed toward the fixed contact piece 3 side by the rotation of the card 10, and the movable contact 6 and the fixed contact 5 come into contact with each other. When the excitation of the electromagnet 8 is released, the other end 9b of the armature does not press the card 10 and the movable contact piece 4 separates from the fixed contact piece 3 by its spring restoring force. By the rotation of the movable contact piece 4, the card 10 is pressed toward the amateur 9 side, and the card 10 and the amateur 9 are returned to the illustrated positions.

[0004]

[Problems to be solved by the device]

 In the conventional small relay 1, the card 10 is interlocked with the rotation of the armature 9 attracted to the electromagnet 8, and the movable contact piece 4 is pressed through the card 10. When the excitation of the electromagnet 8 is released, the movable contact 6 is separated from the fixed contact 5 by the spring restoring force of the movable contact piece 4 itself.

However, when both contacts repeatedly open and close, if an overcurrent flows between them, both contacts may be welded and the movable contact 6 may not separate from the fixed contact 5. . Especially in a small multi-pole relay, if one of the multiple contacts is welded, the movable contact piece 4 will not be restored and all the contacts will remain in contact with each other. The effect of welding on other electrodes is large.

Therefore, even if the fixed contact and the movable contact are welded, there is a technical problem to be solved in order to restore the movable contact piece to the original position and separate the movable contact from the fixed contact. Therefore, the present invention aims to solve this problem.

[0007]

[Means for Solving the Problems]

 The present invention has been proposed to achieve the above object, and the card is rotated toward the movable contact piece side by the rotation of the armature attracted by the electromagnet, and the movable contact piece is fixedly connected by the rotation of the card. In a small relay that presses to one side to bring the movable contact and the fixed contact into contact, a locking portion is provided at the tip of the card, and the tip of the movable contact piece is locked at the locking portion, and the armature is A return spring is installed so as to separate from the electromagnet, the card is returned in conjunction with the separation of the amateur from the electromagnetic stone, and the movable contact is separated from the fixed contact in synchronization with the return operation of the card. It provides a small relay.

[0008]

[Action]

 When the electromagnet is excited, the armature is attracted by the electromagnet to rotate, and the card rotates to the movable contact side in conjunction with the rotation of the armature and is locked to the locking part of the card. The movable contact piece is pressed toward the fixed contact piece side. Therefore, the movable contact comes into contact with the fixed contact.

On the other hand, when the excitation of the electromagnet is released, the armature rotates so as to separate from the electromagnet by the urging of the return spring. The card is returned to its original position in conjunction with the rotation of the amateur, and the movable contact piece held by the card is separated from the fixed contact piece. That is, even if the fixed contact and the movable contact are welded, the movable contact can be forcibly separated from the fixed contact by the card restoring action being added to the spring restoring force of the movable contact itself. .

[0010]

【Example】

 An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a small relay in which a fixed contact piece 12 is erected at one end of a base 11 and a movable contact piece 13 is erected so as to face the fixed contact piece 12. The movable contact piece 13 is formed by bending a spring material into a <character shape, and is normally urged to move away from the fixed contact piece 12. The fixed contact piece 12 is provided with a fixed contact 14, and the movable contact piece 13 is provided with a movable contact 15 in opposition thereto. Then, a yoke 16 is erected at a substantially central portion of the base 11, an electromagnet 17 is mounted on the yoke 16, and an L-shaped armature 18 is supported at an upper end portion of the yoke 16 and returned to the armature 18. A spring 19 is interposed so that one end 18 a of the amateur is urged to move away from the electromagnet 17.

Further, a card 20 is rotatably pivotally attached to a substantially central portion of the base 11, and the other end 18b of the amateur is locked to a locking portion 20a provided at an upper and lower intermediate portion of the card 20. It Further, a locking portion 20b is provided at the upper end of the card 20, and the upper front end 13a of the movable contact piece 13 is inserted and locked in the locking portion 20b. In addition, in a small multi-pole relay, a plurality of fixed contact pieces 12, 12 ... And movable contact pieces 13, 13 ... Are provided, and correspondingly, a plurality of engagement pieces are provided at the tip of the card 20. Stops 20b, 20b ... Are provided.

2 to 4 show the card 20, and as described above, the card 20 is provided with the locking portions 20a and 20b. Since the present embodiment shows a two-pole small relay, two sets of movable contact pieces 13, 13 ... And fixed contact pieces 12, 12 ... Are provided, and two pairs of engagement pieces are provided at the top end of the card 20. Stops 20b, 20b ... Are provided, and the upper tips 13a, 13a of the respective movable contact pieces are sandwiched and locked by the locking portions 20b, 20b.

When the electromagnet 17 is excited in the state shown in FIG. 1, one end 18a of the armature is attracted to the electromagnet 17 and the armature 18 rotates, and the other end 18b of the armature moves to the card. The locking portion 20a is pressed to rotate the card 20 toward the movable contact piece 13 side. Therefore, as shown in FIG. 5, the movable contact piece 13 inserted into the locking portion 20b at the top end of the card 20 is pressed toward the fixed contact piece 12 side, and the movable contact 15 comes into contact with the fixed contact 14.

On the other hand, when the excitation of the electromagnet 17 is released, the return spring 19 biases the armature so that the one end 18 a of the armature rotates away from the electromagnet 17. In association with the rotation of the armature 18, the card 20 returns from the state of FIG. 5 to the original position as shown in FIG. 1, and the movable contact piece 13 is separated from the fixed contact piece 12. That is, since the restoring action of the card 20 is added to the spring restoring force of the movable contact piece 13 itself, even if one fixed contact 14 and the movable contact 15 of the multipolar contacts are welded, The movable contact point 15 can be forcibly separated from the fixed contact 14. On the other hand, when the contact points of the multipole contact each other, the respective movable contact pieces 13, 13 ... Operate independently of each other, so that the characteristics are not affected at all.

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.

[0016]

[Effect of device]

 As described in detail in the above one embodiment, the present invention uses the force of the armature to separate from the electromagnet to restore the card, and in addition to the restoring force of the spring of the movable contact piece, the return movement of the card causes the movable contact to move. It supports the restoration operation of the piece. Therefore, it is possible to enhance the separating operation from the fixed contact piece without newly providing a spring or the like for forcibly separating the movable contact piece.

Therefore, even if the fixed contact and the movable contact are welded, the movable contact can be forcibly separated from the fixed contact by the separating force from the electromagnet of the amateur. In particular, in the case of a multi-pole small relay, even if one set of contacts is welded, the welding of the contacts is immediately removed due to the restoring force of the other movable contact piece and the restoring force of the amateur. It is a device that has practical value.

[Brief description of drawings]

FIG. 1 is a side view of a small relay according to an embodiment of the present invention.

FIG. 2 is a side view of the card.

FIG. 3 is a front view of a card.

FIG. 4 is a plan view of the card.

FIG. 5 is a side view of the small relay showing an operating state.

FIG. 6 is a side view of a conventional small relay.

[Explanation of symbols]

 12 fixed contact piece 13 movable contact piece 13a upper end 14 fixed contact point 15 movable contact point 17 electromagnet 18 armature 18a one end 18b other end 19 return spring 20 card 20a, 20b locking portion

Claims (1)

[Scope of utility model registration request] 1. A card is rotated toward a movable contact piece side by rotation of an amateur attracted by an electromagnet, and the movable contact piece is pressed toward the fixed contact piece side by the rotation of the card to bring the movable contact point into contact with the fixed contact point. In a small relay to be made, an engaging portion is provided at the tip of the card, the tip of the movable contact piece is engaged with the engaging portion, and a return spring is interposed so that the armature separates from the electromagnet. A small relay characterized by being formed so that the card is returned in conjunction with the separation of the amateur from, and the movable contact is separated from the fixed contact in conjunction with the return operation of the card.