JP4000785B2 - relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a relay, and more particularly, to a shape of a magnetic pole face of an iron core constituting the electromagnet block.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, when configuring a relay, for example, a thin relay with a small floor area, one end of a flat iron core having a rectangular cross section is bent into a substantially L shape to form a bent piece, and the outer surface of the bent piece Is sometimes used as the pole face.
[0003]
However, since the iron core having the above-described configuration is formed by being bent, rounds having a high polarity are formed at the corners. For this reason, there exists a problem that the adsorption | suction area which can be used as a magnetic pole surface of an iron core is substantially small, and magnetic efficiency is low.
[0004]
In view of the above problems, an object of the present invention is to provide a thin relay having a small floor area and made of an iron core having a magnetic pole surface having a large adsorption area.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the relay according to the present invention is the relay in which the contact mechanism portion is arranged on one side of the vertically long iron core around which the coil is wound, and the movable iron piece is arranged on the other side. While a pair of coil terminals are arranged side by side on the other side of the core, the end of the other side of the iron core is bent to the side opposite to the coil terminal to have an L-shaped cross section and bent. The movable iron piece is brought into and out of contact with a suction surface obtained by subjecting the outward surface of the end portion to planarization. And as said planarization process, crushing process or shaving process is mentioned.
[0006]
Therefore, according to the present invention, the adsorption area of the iron core is expanded by the planarization process, and the magnetic efficiency can be increased. For this reason, the electromagnet block made of the above-described iron core can be further reduced in thickness, and the floor area of the entire relay can be reduced.
Further, on the other side of the iron core around which the coil is wound, the movable iron piece facing the adsorption surface and the coil terminal are adjacent to each other. For this reason, there is an effect that a dead space generated by winding the coil can be effectively used, and a desired magnetomotive force can be secured while avoiding an increase in size of the apparatus.
[0007]
Further, a coiled portion of the coil terminal may be arranged in the vicinity of the other side of the iron core so as to be adjacent to the movable iron piece.
[0008]
According to this embodiment, the same effect as described above can be obtained.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS.
The relay according to the embodiment of the present invention generally includes a base 10, an electromagnet block 20, a contact mechanism 60, a movable iron piece 70, a card 80, and a case 90.
[0010]
As shown in FIG. 4, the base 10 has an insulating support 12 projecting and integrated in the vicinity of one end edge of the base body 11. The insulating column 12 has a guide protrusion 12a at the upper end thereof, and insulating walls 12b and 12c (FIGS. 2, 4 and 9) extending in opposite directions from the opposite side surfaces. Yes. An attachment cavity 13 for assembling the electromagnet block 20 is formed on the upper surface of the base body 11 located at one base of the insulating support column 12. On the other hand, press-fit slits 14 and 15 for press-fitting the movable contact piece 61 and the fixed contact piece 65 are formed on the remaining one-side base of the insulating support column 12. Furthermore, guide grooves 16 and 17 into which horizontal portions 32a and 33a of coil terminals 30 and 31 described later are fitted are formed on the lower surface of the base body 11.
[0011]
As shown in FIG. 5, the electromagnet block 20 includes a spool 21, a pair of coil terminals 30 and 31, a coil 39, an iron core 40, and a yoke 50.
[0012]
The spool 21 is a resin molded product in which a pair of winding body portions 24 and 25 are bridged up and down between a pair of flange portions 22 and 23. The flange portions 22 and 23 are provided with square holes 22a and 23a having the same axis. Furthermore, guide grooves 24a and 25a for guiding the iron core 40 are formed on the opposing surfaces of the winding drum portions 24 and 25, respectively. Further, a mounting base 26 for press-fitting coil terminals 30 and 31, which will be described later, is extended to the flange portion 22 of the spool 21. The mounting base 26 is formed with press-fitting holes 27 and 28 for press-fitting the two coil terminals 30 and 31.
[0013]
As shown in FIG. 6A, the iron core 40 is made of a plate-like magnetic material having a wide end portion, and the one end portion is bent to form a magnetic pole portion 41. The magnetic pole portion 41 has a suction area widened by crushing or shaving the suction surface 41a. For this reason, according to the present embodiment, as shown in FIG. 6B, not only can the suction surface 41a of the width dimension L be ensured, but also the dimension S is shortened compared with the case where the bending process is simply performed. There is an advantage that a thin relay can be obtained.
Further, guide protrusions 43 and 44 are provided on the upper and lower end surfaces of the iron core 40 for easy and reliable insertion into the spool 21, respectively. However, intermediate portions of the guide protrusions 43 and 44 are discontinuous in order to reduce frictional resistance during insertion.
[0014]
As shown in FIG. 5, the yoke 50 is made of a magnetic material bent into a substantially L shape, and a hinge spring 55 bent to a protrusion protruding from the lower surface of the horizontal portion 51 is fixed by caulking. On the other hand, a caulking hole 53 is provided in the vertical portion 52 of the yoke 50.
[0015]
As shown in FIG. 5, the pair of coil terminals 30 and 31 are bent at the external lead-out terminal portions 32 and 33 to form horizontal portions 32 a and 33 a. The vertical portions of the coil terminals 30 and 31 are also pressed to form step portions 30a and 31a. However, the coil terminals 30 and 31 are connected by connecting portions 34 and 35 before being attached to the spool 21. For this reason, after the coil terminals 30 and 31 are attached to the mounting base 26 of the spool 24, they are separated by cutting out the connecting portions 34 and 35.
[0016]
Therefore, the coil terminals 30 and 31 are press-fitted into the press-fitting grooves 27 and 28 formed in the mounting base 26 of the spool 21, respectively, and the bent portion is protruded. Then, the coil 39 is wound around the winding body portions 24 and 25 of the spool 21, and the lead wires are wound around the curled portions of the coil terminals 30 and 31 and soldered.
[0017]
Next, one end portion 42 of the iron core 40 is inserted from the square hole 22a of the flange portion 22 of the spool 21, and the guide protrusions 43, 44 of the iron core 40 are inserted into the guide grooves 24a, 25a of the winding drum portions 24, 25. Fit and insert. At this time, as shown in FIG. 7A, both side surfaces of the iron core 40 and both side surfaces of the winding drum portions 24 and 25 are flush with each other. For this reason, according to the present embodiment, as in the conventional example shown in FIG. 7 (B), compared to the case where the coil 3 is wound around the cylindrical body of the spool 2 into which the iron core 1 is inserted. There is an advantage that a thin electromagnetic device can be obtained.
[0018]
Then, one end portion 42 of the iron core 40 protruding from the square hole 23 a of the flange portion 23 is caulked and fixed to a caulking hole 53 provided in the vertical portion 52 of the yoke 50. Next, the electromagnet block 20 is completed by cutting off the connecting portions 34 and 35 of the coil terminals 30 and 31.
[0019]
As shown in FIG. 4, the contact mechanism unit 60 includes a movable contact piece 61 and a fixed contact piece 65. The movable contact piece 61 made of a conductive spring material is obtained by caulking and fixing a bent lower end portion to an external lead-out terminal portion 62. Further, a movable contact 63 is caulked and fixed near the upper end of the movable contact piece 61, and a drive hole 61a is formed at the upper end. The upper end portion of the external lead-out terminal portion 62 is a press-fit portion 62 a that can be press-fitted into the press-fit slit 14 of the base 10.
[0020]
On the other hand, as with the movable contact piece 61, the fixed contact piece 65 is also formed with an external lead-out terminal portion 66 at the lower end and a fixed contact 67 at the upper end portion. Further, a press-fitting portion 65 a is formed by projecting the intermediate portion of the fixed contact piece 65.
The terminal portion 66 extends a part of the fixed contact piece 65 and is formed thick by folding.
[0021]
As shown in FIG. 4, the movable iron piece 70 is formed by bending the lower end portion of the plate-like magnetic material to form a horizontal portion 71 and forming a protrusion 72 a on the upper end portion of the vertical portion 72. A locking hole 73 is formed near the lower portion of the protrusion 72a. Further, the vertical portion 72 of the movable iron piece 70 is formed with a notch 72b to which the mounting base 26 of the spool 21 is assembled. On the other hand, a cutout portion 71 a is also formed in the horizontal portion 71 of the movable iron piece 70. The bending angle between the horizontal portion 71 and the vertical portion 72 of the movable iron piece 70 is preferably around 100 degrees.
[0022]
The card 80 has a fitting hole 82 provided with a locking claw 81 at one end portion, and a drive protrusion 83 provided horizontally at the other end portion. The card 80 has a guide hole 84 formed in the middle thereof.
[0023]
Therefore, the yoke 50 of the electromagnet block 20 is inserted into the mounting cavity 13 of the base 10 from the side, and the electromagnet block 20 is attached. At this time, the horizontal portions 32 a and 33 a of the coil terminals 30 and 31 are guided by being fitted into the guide grooves 16 and 17 provided on the lower surface of the base 10, so that no positional deviation occurs. Further, the lower surface of the base 10 and the horizontal portions 32a and 33a are flush with each other.
Next, the press-fit portion 62 a of the movable contact terminal 61 and the press-fit portion 65 a of the fixed contact piece 65 are press-fitted into the press-fit slits 14 and 15 of the base 10. For this reason, the terminal portions 62 and 66 of the movable contact piece 61 and the fixed contact piece 65 and the terminal portions 32 and 33 of the coil terminals 30 and 31 are arranged in a line, and an inline terminal structure is obtained.
[0024]
Then, the movable iron piece 70 is positioned on the free end portion of the yoke 50 via a hinge spring 55, and is supported rotatably. Next, the protrusion 72 a of the movable iron piece 70 is fitted into the fitting hole 82 of the card 80, and the locking claw 81 of the card 80 is locked to the locking hole 73 of the movable iron piece 70. On the other hand, by inserting the drive protrusion 83 of the card 80 into the drive hole 61 a of the movable contact piece 61, the guide hole 84 of the card 80 is fitted into the guide protrusion 12 a of the insulating column 12. Next, the case 90 is fitted into the base 10, and a sealing material is injected and solidified on the lower surface of the base 10. At this time, since the lower surface of the base 10 and the horizontal portions 32a and 33a of the coil terminals 30 and 31 are flush with each other, a small amount of seal may be injected. And after extracting internal gas from the gas vent hole 91 of the said case 90, this is sealed and an assembly operation is completed.
[0025]
The operation of the relay configured as described above will be described.
As shown in FIG. 9, when no voltage is applied to the coil 39 of the electromagnet block 20, the card 80 is pressed by the spring force of the movable contact piece 61, and the movable iron piece 70 is moved from the magnetic pole part 41 of the iron core 40. Separated.
[0026]
When a voltage is applied to the coil 39, the movable iron piece 70 is attracted to the magnetic pole part 41 of the iron core 40. For this reason, the movable iron piece 70 rotates against the spring force of the movable contact piece 61 and presses the card 80 engaged with the upper end portion thereof. As a result, after the movable contact piece 61 is pressed and the movable contact 63 comes into contact with the fixed contact 67, the movable iron piece 70 is attracted to the magnetic pole portion 41 of the iron core 40.
[0027]
Next, when the application of the coil 39 is released, the card 80 is pushed back by the spring force of the movable contact piece 61. For this reason, after the movable iron piece 70 is separated from the magnetic pole portion 41, the movable contact 63 is separated from the fixed contact 67, and returns to the original state.
[0028]
【The invention's effect】
According to the present invention, the adsorption area of the iron core is widened by the planarization process, and the magnetic efficiency can be increased. For this reason, the electromagnet block made of the above-described iron core can be further reduced in thickness, and the floor area of the entire relay can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of a relay according to the present invention.
FIG. 2 is a front view of the relay main body shown in FIG.
3 is a perspective view of a relay body viewed from an angle different from that in FIG. 2. FIG.
4 is an exploded perspective view of the relay body shown in FIG. 1. FIG.
FIG. 5 is a perspective view of the electromagnet block shown in FIG.
6A is an enlarged perspective view seen from a different angle of the iron core shown in FIG. 4, and FIG. 6B is an enlarged plan view of a main part.
7A is a partial cross-sectional view of the electromagnet block shown in FIG. 4, and FIG. 7B is a partial cross-sectional view of an electromagnet block according to a conventional example.
FIG. 8 is an exploded perspective view of the relay shown in FIG. 1 viewed from a different angle.
FIG. 9 is a rear view of the relay main body shown in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Base, 11 ... Base main body, 12 ... Insulating support | pillar, 12b, 12c ... Insulating wall, 16, 17 ... Guide groove, 20 ... Electromagnetic block, 21 ... Spool, 22, 23 ... Saddle, 24, 25 ... Winding drum Part, 24a, 25a ... guide groove, 26 ... mounting base, 27, 28 ... guide groove, 30, 31 ... coil terminal, 32, 33 ... terminal part, 32a, 33a ... horizontal part, 34, 35 ... connecting part, 30a , 31a: Stepped portion, 39 ... Coil, 40 ... Iron core, 41 ... Magnetic pole portion, 41a ... Adsorption surface, 43, 44 ... Projection protrusion, 50 ... Yoke, 60 ... Contact mechanism, 61 ... Movable contact piece, 65 ... fixed contact piece, 70 ... movable iron piece, 71 ... horizontal part, 72 ... vertical part, 80 ... card, 90 ... case.

Claims (2)

In the relay in which the contact mechanism part is arranged on one side of the vertically long iron core around which the coil is wound, and the movable iron piece is arranged on the other side,
While arranging a pair of coil terminals side by side on the other side of the iron core, the end of the other side of the iron core is bent to the side opposite to the coil terminal to have an L-shaped cross section, A relay characterized in that the movable iron piece is brought into contact with and separated from a suction surface obtained by performing a planarization process on an outward surface of the bent end portion.   The relay according to claim 1, wherein a curled portion of the coil terminal is arranged in the vicinity of the other side of the iron core so as to be adjacent to the movable iron piece.

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