JP2014130689A - Coil block and electromagnetic relay having coil block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil block capable of preventing rotation of a coil terminal and an electromagnetic relay having the coil block.SOLUTION: A coil block 30 comprises: a coil bobbin 32 on which a coil 31 is wound; and a coil terminal 31a to which the coil 31 is connected and is attached to a coil terminal mounting block 32a of the coil bobbin 32. The coil terminal 31a has a bent portion 31b formed therein and the coil terminal mounting block 32a has a receiving part 32b formed for receiving the bent portion 31b.

Description

  The present invention relates to a coil block and an electromagnetic relay including the coil block.

  2. Description of the Related Art Conventionally, a coil block including a spool around which a coil is wound and a coil terminal that winds the coil is known (see, for example, Patent Document 1).

  In Patent Document 1, the coil terminal is attached to the spool by press-fitting the coil terminal into a coil terminal holding portion formed on the spool.

JP-A-2005-293952

  However, in the above conventional technique, the coil terminal is attached to the spool by press-fitting a cylindrical coil terminal into the coil terminal holding portion. Therefore, the coil terminal attached to the spool may rotate due to vibration or the like. As described above, when the coil terminal rotates, the press-fitting strength of the coil terminal decreases, and the coil terminal may fall out of the spool.

  Then, this invention aims at obtaining the electromagnetic relay provided with the coil block which can suppress that a coil terminal rotates, and the said coil block.

  A first feature of the present invention is a coil block comprising a coil bobbin around which a coil is wound, and a coil terminal to which the coil is connected and attached to a coil terminal attachment part of the coil bobbin, The gist is that a bent portion is formed, and the coil terminal mounting portion is formed with a receiving portion for receiving the bent portion.

  The second feature of the present invention is that the coil terminal mounting portion is an insertion hole into which the coil terminal is inserted, and a gap is formed in the receiving portion in a state where the bent portion is received. And

  The gist of the third feature of the present invention is an electromagnetic relay including the coil block.

  According to the present invention, the bent portion is formed in the coil terminal, and the receiving portion for receiving the bent portion is formed in the coil terminal mounting portion of the coil bobbin. Therefore, it is possible to attach the coil terminal so that the receiving part of the coil terminal attaching part receives the bent part of the coil terminal, and the coil terminal can be prevented from rotating relative to the coil bobbin.

It is sectional drawing of the electromagnetic relay concerning one Embodiment of this invention. It is a perspective view which shows the state which isolate | separated the case of the electromagnetic relay shown in FIG. It is a perspective view which shows the terminal of the electromagnetic relay concerning one Embodiment of this invention. It is a reverse view which shows the attachment state of the terminal of the electromagnetic relay concerning one Embodiment of this invention. It is sectional drawing which shows the attachment state of the terminal of the electromagnetic relay concerning one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The electromagnetic relay 1 according to the present embodiment includes a base 2, an electromagnet block 3, an armature 4, a card 5, a contact portion 6, and a case 7.

  The base 2 is formed of a synthetic resin that is an insulating material, and the overall planar shape has a substantially rectangular shape with a predetermined thickness having a longitudinal direction and a transverse direction.

  The electromagnet block 3 is mounted on one end of the base 2 in the longitudinal direction, and includes a coil block 30, an iron core 33, and a substantially L-shaped yoke 34 connected to the lower end of the iron core 33. It has. Further, the permanent magnet 35 is sandwiched between the portions of the yoke 34 that are erected from the base 2.

  The coil block 30 includes a coil bobbin 32 around which a coil 31 is wound, and a coil terminal 31a attached to an insertion hole (coil terminal attachment portion) 32a of the coil bobbin 32, with the coil 31 being wound (connected) at one end. ing. In the present embodiment, a pair of coil terminals 31 a are provided in the short direction of the base 2. The coil bobbin 32 has a cylindrical body part (not shown) in which the coil 31 is wound around the outer peripheral part and the iron core 33 is inserted therein, and a flange extending horizontally from both ends of the body part. A portion 32e is formed. An insertion hole (coil terminal mounting portion) 32a is formed in the lower flange portion 32e. In this embodiment, the flange part 32e in which the insertion hole (coil terminal attachment part) 32a was formed is integrally formed in the base 2, and the coil terminal 31a is attached to the site | part corresponded to the flange part 32e of the base 2. FIG. ing. That is, the pair of coil terminals 31 a is attached to the coil bobbin 32 so as to protrude downward from the base 2. The flange portion 32e can be formed separately from the base 2.

  The armature 4 is made of a soft magnetic material, and is formed in a substantially L shape by a bent portion 4a. One end portion of the armature 4 is a horizontal portion 4b facing the upper surface of the bobbin 32, and the other end portion is a vertical portion 4c along the side surface opposite to the bobbin 32 of the yoke 34. In the armature 4, the front end portion of the horizontal portion 4 b is disposed opposite to the upper end surface of the iron core 33 with an appropriate interval in a state where the bent portion 4 a is supported by the upper end of the yoke 34. Thus, the vertical portion 4c swings in the direction indicated by the arrow a in FIG.

  For example, when the armature 4 is in the state shown in FIG. 1, when the electromagnet block 3 is excited by passing a current in a predetermined direction through the coil 31, the horizontal portion 4b is attracted to the iron core 33, and the vertical portion 4c of the armature 4 is With the bent portion 4a serving as a fulcrum, it rotates in the counterclockwise direction in FIG. 1 and moves away from the yoke 34.

  When the energization of the coil 31 is stopped in this state, the armature 4 is moved to the state (the vertical portion 4c of the armature 4 is counterclockwise in FIG. 1 with the bent portion 4a as a fulcrum by the attractive force of the permanent magnet 35. And is moved in a direction away from the yoke 34).

  When the electromagnet block 3 is excited by applying a current in the opposite direction to the coil 31 while the armature 4 is rotated counterclockwise in FIG. 1, the horizontal portion 4 b is separated from the iron core 33, and the armature 4 The vertical portion 4c rotates in the clockwise direction of FIG. 1 with the bent portion 4a as a fulcrum and moves in a direction approaching the yoke 34.

  When energization of the coil 31 is stopped in such a state, the armature 4 is held in that state (the state shown in FIG. 1) by the attractive force of the permanent magnet 35.

  The armature 4 is provided with a hinge spring 41, and the hinge spring 41 prevents the armature 4 from being displaced when reciprocating.

  As described above, the electromagnetic relay 1 according to the present embodiment is a so-called latch type in which the armature 4 reciprocates by changing the energization direction to the coil 31.

  The card 5 is located between the vertical portion 4c of the armature 4 and the contact portion 6 disposed at the other end portion of the base 2 in the longitudinal direction, and via a rotation support shaft 51 provided at the lower end portion. The base 2 is swingably attached. The swinging direction at this time is the longitudinal direction of the base 2 as shown by the arrow b in FIG.

  On one side 5 a where the card 5 faces the vertical portion 4 c of the armature 4, a first projecting portion 52 that abuts the vertical portion 4 c of the armature 4 is provided at a substantially intermediate portion in the vertical direction. Further, on the other side 5 b where the card 5 faces the contact portion 6, a second protrusion 53 is provided that is positioned above the first protrusion 52.

  When the vertical portion 4c of the reciprocating armature 4 moves in a direction away from the yoke 34 due to excitation of the electromagnet block 3 (energization of the coil 31 in a predetermined direction), the moving force is the first protrusion. The card 5 is input to the card 5 via the switch 52 and the card 5 swings in the direction of the contact portion 6.

  The contact portion 6 includes a fixed terminal 61 having a fixed contact 61a and a movable spring 62 having a movable contact 62a. The fixed terminal 61 and the movable spring 62 are positioned such that the movable spring 62 is on the card 5 side and the fixed terminal 61 is on the side away from the card 5. In this state, it is erected from this base 2. The terminals 61 b and 62 b of the fixed terminal 61 and the movable spring 62 protrude downward from the base 2.

  In the present embodiment, in the contact portion 6, in a state where the horizontal portion 4 b is not attracted to the iron core 33, the fixed contact 61 a and the movable contact 62 a are separated from each other, and the horizontal portion 4 b is attracted to the iron core 33. When the electromagnet block 3 is excited in this manner, the fixed contact 61a and the movable contact 62a are configured as contact points.

  That is, the movable spring 62 is in contact with or close to the second projecting portion 53 of the card 5 in a state where the horizontal portion 4 b is not attracted to the iron core 33. When the card 5 swings with excitation of the electromagnet block 3 (energization of the coil 31 in a predetermined direction), the movable spring 62 is bent by pressing the movable spring 62 with the second protrusion 53. When the movable spring 62 is bent, the movable contact 62a comes into contact with the fixed contact 61a and the contact portion 6 is turned on.

  On the other hand, when the vertical portion 4c of the armature 4 moves in the clockwise direction in FIG. 1 due to the excitation of the electromagnet block 3 (energization in the direction opposite to the predetermined direction to the coil 31), the card 5 It swings in the direction of the armature 4 by the spring force. Thereby, the movable contact 62a is separated from the fixed contact 61a, and the contact portion 6 is turned off.

  Thus, the contact portion 6 is switched between the on state and the off state in accordance with the swing of the card 5.

  The contact portion 6 may have a structure in which the horizontal portion 4b is not attracted to the iron core 33, or the contact portion 6 is separated from a contact that is in contact with the horizontal portion 4b not attracted to the iron core 33. It is good also as a contact structure provided with both.

  Moreover, although the lower end part of the contact part 6 is supported by the base 2 in which the electromagnet block 3 is mounted, in this embodiment, since the base 2 is formed with an insulating material, the coil 31 and the contact part 6 The electrical insulation between the two can be improved.

  As shown in FIG. 2, the case 7 is formed as a rectangular parallelepiped casing that is opened downward as a whole, and the lower end opening 7 a is fitted in close contact with the stepped portion 2 a formed on the outer periphery of the base 2. It is supposed to be combined. In the case 7, a partition wall 71 is provided between the vertical portion 4 c of the armature 4 and the card 5. The partition wall 71 is formed with a notch 71a that penetrates the first protrusion 52, and the partition wall 71 is formed in a gate shape.

  In addition, an engagement hole 72 is formed at the lower end of the side wall on both sides in the short direction of the case 7. The engagement hole 72 is formed from the stepped portion 2 a of the base 2. The case 7 is prevented from being pulled out by being locked to the engaging protrusion 21.

  The base 2 to which the rotation support shaft 51 of the card 5 is swingably mounted is formed with a bearing portion 22 that receives the rotation support shaft 51 rotatably inside the base 2. In the present embodiment, the outer side of the bearing portion 22 in the central axis direction is open, but the outer side of the bearing portion 22 in the central axis direction may be closed.

  The bearing portion 22 opens to the surface of the base 2 (upper surface in FIG. 1), and takes in the rotation support shaft 51 from directly above the surface of the base. That is, in the present embodiment, the front surface (upper surface in FIG. 1) side of the base 2 is the front side in the insertion direction of the card 5.

  Therefore, in the present embodiment, when the card 5 is attached to the base 2, the rotation support shaft 51 is pushed toward the bearing portion 22 from above. Thus, when the rotation support shaft 51 is pushed into the bearing portion 22 from above, the rotation support shaft 51 is fitted to the bearing portion 22. Then, the card 5 is attached to the base 2 so as to be swingable in the arrow b direction.

  Reference numeral 25 denotes a support recess for inserting the lower end of the movable spring 62, reference numeral 26 denotes a support recess for inserting the lower end of the fixed terminal 61, and reference numeral 27 denotes a partition wall 71 of the case 7. It is a support groove for fitting the both sides of the notch 71a.

  Here, in the present embodiment, the coil terminal 31 a can be prevented from rotating relative to the coil bobbin 32.

  Specifically, as shown in FIG. 3, a bent portion 31b is formed in the coil terminal 31a. In the present embodiment, the coil terminal 31a has a crank shape having a bent portion 31b bent substantially at a right angle. A press-fit projection 31c is formed on one end side (insertion side) of the coil terminal 31a.

  Further, as shown in FIG. 5, a receiving portion 32 b that receives the bent portion 31 b is formed in the insertion hole (coil terminal mounting portion) 32 a of the coil bobbin 32. In the present embodiment, the insertion hole (coil terminal mounting portion) 32a includes a receiving portion 32b that receives the bent portion 31b, and a press-fit portion 32c into which one end side (insertion side) where the press-fit protrusion 31c of the coil terminal 31a is formed is inserted. And is composed of.

  The press-fit portion 32c is formed as an insertion hole having a diameter substantially the same as the diameter of the coil terminal 31a. On the other hand, the receiving portion 32b is formed as an insertion hole having a long hole shape, and the vertical width (longitudinal width) is substantially the same as the width of the bent portion 31b, and the horizontal width (short width) is a coil terminal. The width is approximately the same as the diameter of 31a.

  Then, the side on which the press-fit projection 31c of the coil terminal 31a is formed is inserted from the receiving portion 32b side of the insertion hole (coil terminal mounting portion) 32a to the press-fit portion 32c, and the side on which the press-fit projection 31c is formed. It is press-fitted and fixed to the press-fit portion 32c. At this time, the side on which the press-fitting protrusion 31c of the coil terminal 31a is formed is inserted into the press-fitting part 32c until the bent part 31b is received by the receiving part 32b. In the present embodiment, the side on which the press-fitting protrusion 31c of the coil terminal 31a is formed is inserted into the press-fit portion 32c until the bent portion 31b contacts the inner bottom surface 32d of the receiving portion 32b (see FIG. 5). At this time, the receiving portion 32b is formed so that the gap S is formed in a state where the bent portion 31b is received. An adhesive 80 is introduced into the gap S, and the bent portion 31b is fixed to the receiving portion 32b by the adhesive 80.

  As described above, the coil terminal 31a is press-fitted and fixed in the insertion hole (coil terminal mounting portion) 32a of the coil bobbin 32 so that the coil terminal 31a can be prevented from rotating relative to the coil bobbin 32. Yes.

  Next, the operation of the electromagnetic relay 1 having such a configuration will be described.

  First, in the state shown in FIG. 1, that is, in a state where the horizontal portion 4 b is not attracted to the iron core 33, the armature 4 is in a state where the vertical portion 4 c has moved to the yoke 34 side. In this state, the card 5 is in a position where it swings toward the armature 4 by the spring force of the movable spring 62, and the contact portion 6 is in an off state with the fixed contact 61a and the movable contact 62a being separated from each other.

  When the electromagnet block 3 is excited by passing a current in the coil 31 in a predetermined direction, the armature 4 is attracted to the iron core 33 by the horizontal portion 4b and is rotated counterclockwise in FIG. The card 5 is rotated to swing the card 5 toward the contact part 6 by the vertical part 4c. Then, the card 5 bends the movable spring 62 against the fixed terminal 61 against the spring force, brings the movable contact 62a into contact with the fixed contact 61a, and brings the contact portion 6 into an on state.

  When the power supply to the coil 31 is interrupted in this state, the armature 4 is held in that state (the state rotated in the counterclockwise direction in FIG. 1) by the attractive force of the permanent magnet 35, and the contact portion 6 The on state is maintained.

  Next, when an electric current in a direction opposite to a predetermined direction is passed through the coil 31 to excite the electromagnet block 3, the armature 4 rotates about the bent portion 4a in the clockwise direction in FIG. Moves to the yoke 34 side. As a result, the card 5 is swung toward the armature 4 by the spring force of the movable spring 62, and the contact portion 6 is turned off.

  When the power supply to the coil 31 is interrupted in this state, the armature 4 is held in that state (the state shown in FIG. 1) by the attractive force of the permanent magnet 35, and the contact portion 6 is maintained in the off state.

  As described above, in the present embodiment, the bent portion 31b is formed in the coil terminal 31a, and the receiving portion 32b that receives the bent portion 31b is formed in the insertion hole (coil terminal mounting portion) 32a of the coil bobbin 32. Therefore, it is possible to attach the coil terminal 31a so that the receiving part 32b of the insertion hole (coil terminal attaching part) 32a receives the bent part 31b of the coil terminal 31a. In this way, if the coil terminal 31a is attached to the insertion hole (coil terminal attachment part) 32a in a state where the receiving part 32b receives the bent part 31b of the coil terminal 31a, the coil terminal 31a is relative to the coil bobbin 32. Rotation can be suppressed.

  That is, even if the coil block 30 vibrates when the electromagnetic relay 1 is attached or operated, the relative rotation of the coil terminal 31a with respect to the coil bobbin 32 is suppressed, so that the press-fitting strength of the coil terminal 31a is reduced. Can be suppressed.

  Further, the relative rotation of the coil terminal 31a with respect to the coil bobbin 32 is suppressed, so that the coil terminal 31a can be prevented from coming out of the coil bobbin 32. Furthermore, by suppressing the relative rotation of the coil terminal 31a with respect to the coil bobbin 32, there is also an advantage that the coil 31 entangled with the coil terminal 31a can be prevented from being loosened.

  Moreover, according to this embodiment, the receiving part 32b is formed so that the clearance gap S may be formed in the state which received the bending part 31b. Therefore, it is possible to introduce the adhesive 80 into the gap S. That is, the coil terminal 31 a can be firmly fixed by the coil bobbin 32. As a result, the coil terminal 31a can be more reliably suppressed from coming out of the coil bobbin 32.

  Moreover, it can suppress that the function as the electromagnetic relay 1 falls by using the electromagnetic relay 1 provided with the coil block 30 mentioned above.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above embodiment, a so-called latch type electromagnetic relay is illustrated, but the armature reciprocates in the direction in which the vertical portion is away from the yoke and in the direction in which the vertical portion is moved away from the yoke by excitation and de-energization of the electromagnetic block. It may be.

  That is, when the horizontal part of the armature is biased away from the iron core by the hinge spring and the electromagnet block is demagnetized, the hinge spring moves the electromagnetic part so that the vertical part of the armature approaches the yoke. A relay may be configured.

  Also, the electromagnet block, armature, and other detailed specifications (shape, size, layout, etc.) can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 30 Coil block 31 Coil 31a Coil terminal 31b Bending part 32 Coil bobbin 32a Insertion hole (coil terminal attachment part)
32b Receiving part S Clearance

Claims (3)

A coil block comprising: a coil bobbin around which a coil is wound; and a coil terminal to which the coil is connected and attached to a coil terminal attachment portion of the coil bobbin,
The coil terminal is formed with a bent portion,
The coil block, wherein the coil terminal mounting portion is formed with a receiving portion for receiving the bent portion.   The coil according to claim 1, wherein the coil terminal mounting portion is an insertion hole into which the coil terminal is inserted, and a gap is formed in the receiving portion in a state where the bent portion is received. block.   An electromagnetic relay comprising the coil block according to claim 1.

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