JPH04119947U - electromagnetic relay - Google Patents

Abstract

(57) [Summary] (with modifications) [Purpose] To provide an electromagnetic relay with a small number of parts, easy adjustment work, and high productivity. [Structure] Base 1 with a frame 11 integrally molded on the top surface forming a cavity 12 whose opening on one side is sealed with an insulating wall.
0, an electromagnet part 20 inserted and fixed in the hollow part 12 of the base 10, a movable iron piece 30 rotatably assembled to one end side of the electromagnet part 20 exposing the magnetic pole part 25a, and an insulating wall between them. A contact mechanism section 50 provided on the other end side of the electromagnet section 20, and a free end section of the movable iron piece 30 and the contact mechanism section 50.
A card 60 is connected at both ends to a movable contact piece 53 and is slidably supported.
By using a configuration in which the card 60 is slid by the movable iron piece 30 that rotates based on the excitation and demagnetization of the contact mechanism section 50, the electromagnet section 20 and the contact mechanism section 5 can be moved.
0 is partitioned by a frame 11 integrally provided with a base 10, and movable components such as a movable iron piece 30 are exposed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an electromagnetic relay, particularly to an insulation structure of an electromagnet part.

0002

[Conventional technology]

Conventionally, electromagnetic relays have been described, for example, in British Patent No. 2167902. There are some types, such as those shown above, that are short and can ensure a long insulation distance. That is, as shown in FIGS. 6 and 7, a substantially L-shaped The electromagnet part 3 with the movable iron piece 5 rotatably assembled is housed and fixed in the box-shaped case 1. On the other hand, one end of the electromagnet section 3 is connected with the partition wall 1a protruding from the bottom of the case 1 in between. The movable contact piece 7 and the fixed contact piece 8 are assembled on the side, and the movable iron piece 5 and the A card 6 whose both ends are connected to a movable contact piece 7 is supported so as to be slidable. This is what I did. Furthermore, the electromagnet part 3, the movable contact piece 7 and the fixed contact piece 8 An insulating member 9 is attached to one side of the electromagnet 3 in order to insulate the electromagnet 3.

0003 When the movable iron piece 5 rotates based on the excitation and demagnetization of the electromagnet part 3, the movable iron piece 5 rotates. The free end of the moving iron piece 5 presses one end surface of the card 6, and the pressed card 6 The upper end of the movable contact piece 7 is pressed and rotated, and the movable contact 7a is It contacts the fixed contact 8a.

0004

[Problem that the idea aims to solve]

However, according to the electromagnetic relay described above, in order to ensure a long insulation distance, An insulating member 9 separate from the case 1 must be assembled between the magnet part 3 and the movable contact piece 7. Therefore, the number of parts is large and the number of assembly steps is large. Moreover, the adjustment can be made after the internal components such as the electromagnet part 3 are installed inside the box-shaped case 1. Because the adjustment work has to be done, the areas that can be adjusted are limited, and adjustment work is difficult. The problem was that it was time consuming and had low productivity.

[0005] Therefore, in view of the above problems, the present invention has a small number of parts, easy adjustment work, and high productivity. The purpose is to provide an electromagnetic relay with high productivity.

[0006]

[Means to solve the problem]

In order to achieve the above object, the electromagnetic relay according to the present invention has an opening on one side. A base with an integrally molded frame on the top that forms a cavity sealed by an edge wall, and an iron core. It is formed by winding a coil through a spool and exposes the magnetic pole part of the iron core. An electromagnet part inserted and fixed into the hollow part of the base, and an electric magnet part exposing the magnetic pole part. A movable iron piece rotatably assembled on one end of the magnet part and an insulating wall of the base. A contact mechanism part provided on the other end side of the electromagnet part in between, and a free part of the movable iron piece. Both ends are connected to the movable contact piece of the contact mechanism section and can be slid. It consists of a supported card, and before it rotates based on the excitation and demagnetization of the electromagnet part. A structure in which the contact mechanism section is driven by sliding the card using a movable iron piece. This is what I did.

[0007]

[Effects of actions and ideas]

Therefore, according to the present invention, the electromagnet portion seals one side of the opening with an insulating wall. It is insulated from the contact mechanism via the cylindrical base. Therefore, according to the present invention, the electromagnetic relay consists of a separate body like the conventional electromagnetic relay. Since there is no need to assemble insulating materials, the number of parts is reduced and assembly man-hours are reduced. Decrease. Moreover, according to the present invention, most of the movable components such as movable iron pieces and cards Since it is exposed, adjustment work does not take much time and productivity is improved. be.

[0008]

【Example】

An embodiment of the present invention will be described below with reference to the accompanying drawings of FIGS. 1 to 5. .

[0009] The electromagnetic relay according to this embodiment generally includes a base 10 and a hinge spring 40. The electromagnet section 20 with the movable iron piece 30 assembled thereon, the contact mechanism section 50, and the sliding cover. It consists of a card 60 and a case 70.

0010 The base 10 has a hollow portion 1 by integrally molding a frame 11 having a substantially U-shaped cross section in the center of the upper surface. 2, and the back opening of this cavity 12 is connected to the insulating wall 13 of the frame 11. It is sealed. Furthermore, the base 10 includes a portion located on the outer side of the insulating wall 13. The contact mechanism section 50 can be configured by assembling a movable contact piece 53, etc., which will be described later, from the side. Press-fit grooves 14, 15, and 16 are provided alternately in a staggered manner.

[0011] The electromagnet part 20 is a body part (not shown) of a spool 23 having flanges 21 and 22 at both ends. The coil 24 is wound around the body (not shown), and the cross section is approximately T in the through hole (not shown) provided in the body. The iron core 25 in the shape of a letter is inserted, and one end exposed from the front of the collar portion 21 is connected to the magnetic pole portion 25a. and the other end protruding from the flange 22 is attached to the vertical part of the yoke 26 bent into a substantially L shape. It is fixed by caulking.

0012 The yoke 26 has positioning protrusions by protruding both side edges of its horizontal end surface 26a. The positioning protrusions 26b, 26b are formed on the front side of the flange 21. stands out from

[0013] The collar portion 21 of the spool 23 has hinge springs 40 (described later) on both front side edges thereof. It has slits 21a, 21a for locking the A pair of guide protrusions 21b, 21b having a letter shape are protruded. In addition, the spout The collar portion 21 of the coil 23 has coil terminals 27, 27 attached to the opposing side end surfaces from the side. The coil terminal 27 is press-fitted and fixed into the tangled portion 27a located at the upper end of the coil terminal 27. The lead wire of the coil 24 is twisted and soldered.

[0014] The movable iron piece 30 has a planar shape that can be assembled to the front center portion of the flange portion 21, Positioning notches 31, 31 are provided on both side edges near the lower end, and the upper A semicircular notch 32 is provided on the end face.

[0015] Then, the notches 31, 31 are connected to the positioning protrusions 26b, 26 of the yoke 26. b, the movable iron piece 30 can approach and separate from the magnetic pole part 25a of the iron core 25. Opposed to Noh.

[0016] The hinge spring 40 is made of a thin plate-shaped spring material having a substantially E-shape from the front, and has arms on both sides. When the parts 41 and 42 are press-fitted into the slits 21a and 21a of the spool 23, The long tongue portion 43 extending from the center presses the lower end of the back surface of the movable iron piece 30, and The movable iron piece 30 is hinged so as to be rotatable about the horizontal end surface 26a of the yoke 26. held.

[0017] The electromagnet section 20 has the movable iron piece 30 assembled thereto via the hinge spring 40. are assembled into one body by inserting them into the cavity 12 of the base 10 from the side. I get kicked. According to this embodiment, the hinge spring 40 is disposed at the lower end of the back surface of the movable iron piece 30. As a result, the dead space created on the back side of the movable iron piece 30 can be effectively used, and the device It has the advantage that it can be made smaller.

[0018] The contact mechanism section 50 consists of a pair of fixed contact pieces 51 and 52 and a movable contact piece 53. The fixed contacts 51a, 52a of the fixed contact pieces 51, 52 and the movable contact The movable contact 53a of the contact piece 53 is offset by a predetermined distance from the center line in the width direction of each contact piece. It is placed in a convenient location. Therefore, the contacts 51a, 52a, and 53a are bent. Since not only moment but also torsional moment acts, it has good welding resistance. deer Also, the contact point is installed at a position eccentric from the center line of the part where the contact piece is fixed to the terminal part. This increases the effective spring length of each contact piece, allowing for shorter electromagnetic relays. It has the advantage of being able to obtain Furthermore, the movable contact piece 53 has a guide hole 53c above the movable contact 53a. are doing. Note that the fixed contact pieces 51, 52 and the movable contact piece 53 are not limited to straight ones. , it may have a bent shape in consideration of material removal.

[0019] Terminal portions 51b and 52b of fixed contact pieces 51 and 52 and movable contact piece 53 The terminal portion 53b is inserted into the press-fit slits 14, 15, 16 provided in the base 10. By alternately press-fitting from the sides in a bird-like manner, the fixed contacts are inserted with the movable contacts 53a in between. 51a and 52a face each other. According to this embodiment, the fixed contact pieces 51 and 52 and the movable contact piece 53 are pressed against the base 10. The terminals are press-fitted and fixed alternately from the sides in a staggered manner into the grooves 14, 15, and 16. The insulation distance between the parts can be increased, and the width of the movable contact piece 53 can be increased. It has the advantage that there is little temperature rise even when a large current is passed through it.

[0020] The sliding card 60 is made of a synthetic resin board with a substantially rectangular plane, and the center It has a rectangular fitting hole 61 at the end, and engaging metal fittings 62 and 63 are insert-molded at both ends. This is what I did. Then, the sliding card 60 has a pair of drives from one end surface. The position regulating claw portion 62 of the engaging fitting 62 is provided between the projecting protrusions 64 and 64. The pressing claws 63a, 63a of the engaging metal fitting 63 protrude from the other end surface. and a long tongue portion 63b located therebetween.

[0021] Then, the long tongue portion 63b of the sliding card 60 is inserted into the guide hole 5 of the movable contact piece 53. 3c, and while pressing the movable contact piece 53 with the pressing claws 63a, 63a, the position Position the regulating claw part 62a in the notch part 32 of the movable iron piece 30, and attach the sliding cover. Push the protrusions 64, 64 of the card 60 between the guide protrusions 21b, 21b of the spool 23. When pushed in, the guide protrusions 21b and 21b align with the protrusions 64 and 64, as shown in FIG. The card 60 is locked with a single touch to the stepped portion 64a (the back side is not shown) of the card 64. Supported in a slidable manner. According to this embodiment, the engaging metal fittings 62 and 63 are inserted into both ends of the card 60. Because the card 60 is shaped like a No abrasion powder is generated even when the product is moved, and contact failures due to abrasion powder do not occur. Moreover, heat melts It has the advantage of improving productivity because it is difficult to assemble and is easy to assemble. Ru.

[0022] The case 70 has a box shape that can be fitted into the base 10, and has a central part on its ceiling surface. An annular protrusion 71 protrudes inward from the. Furthermore, the case 70 has an upper surface It has a gas vent hole 72 in the corner and can be broken off to remove gas that occurs during use. It has a protrusion 73 that forms a gas vent hole for venting nitric acid gas.

[0023] Then, the case is attached to the base 10 on which the internal components such as the electromagnet part 20 are assembled. When the card 70 is fitted, the lower end of the protrusion 71 is inserted into the base through the fitting hole 61 of the card 60. 10 (FIG. 2). Then, seal it on the bottom of base 10. The agent (not shown) is injected, solidified and sealed, and the internal gas is vented from the gas vent hole 72. After that, the gas vent hole 72 is sealed by heat melting, and the assembly work is completed. is completed.

[0024] According to this embodiment, since the case 70 is supported via the protrusion 71, the case 70 The card 60 has the advantage that the operation of the card 60 is not hindered even if an external force is applied to the top surface of the card 60. Ru. Note that the shape that supports the case 70 is not limited to the above-mentioned shape; for example, the shape that supports the case 70 is A protrusion may be provided on the top surface, and the card 60 may have a notch instead of a fitting hole. It may be provided.

[0025] Next, the operation of the electromagnetic relay configured as described above will be explained. When the electromagnet section 10 is not energized, the movable contact piece 53 moves as shown in FIG. 2 by its own spring force. The movable contact 53a is biased to the left and is in contact with the fixed contact 51a.

[0026] When a voltage is applied to the coil 24 and the electromagnet part 10 is excited, the magnetic pole part 2 of the iron core 25 5a attracts the movable iron piece 30, the movable iron piece 30 rotates and its tip touches the car. The tip surfaces of the protrusions 64, 64 provided on the door 60 are pressed. For this reason, the sliding car The card 60 slides to the right in FIG. a presses the upper end of the movable contact piece 53. As a result, the movable contact piece 53 rotates, The movable contact 53a switches from the fixed contact 51a to the fixed contact 52a.

[0027] Then, when the electromagnet section 10 is de-energized, the movable contact piece 53 is moved by its own spring force. The sliding card 60 is pushed back and the movable contact 53a is disconnected. Instead, it returns to its original state.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an electromagnetic relay according to an embodiment.

FIG. 2 is a sectional view of the electromagnetic relay according to the present embodiment.

FIG. 3 is an explanatory diagram for assembling the electromagnetic relay according to the present embodiment.

FIG. 4 is an enlarged perspective view of the main parts of the electromagnetic relay according to the present embodiment.

FIG. 5 is an enlarged perspective view of the main parts of the electromagnetic relay according to the present embodiment.

FIG. 6 is a sectional view of a conventional electromagnetic relay.

FIG. 7 is a front view showing a movable contact piece of an electromagnetic relay according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10... Base, 11... Frame body, 12... Cavity part, 13... Insulating wall, 20... Electromagnet part, 23... Spool, 24... Coil,
25... Iron core, 25a... Magnetic pole part, 30... Movable iron piece, 50...
Contact mechanism section, 53...movable contact piece, 60... card.

Claims (1)

[Scope of utility model registration request] 1. A base having a frame integrally molded on the upper surface forming a cavity whose opening on one side is sealed with an insulating wall, and a base formed by winding a coil around an iron core via a spool, an electromagnet part inserted and fixed in the hollow part of the base so as to expose the magnetic pole part of the core; a movable iron piece rotatably assembled to one end side of the electromagnet part exposing the magnetic pole part;
A contact mechanism section provided on the other end side of the electromagnet section with an insulating wall of the base in between, and a sliding mechanism whose both ends are connected to the free end of the movable iron piece and the movable contact piece of the contact mechanism section. 1. An electromagnetic relay comprising a movably supported card, and the movable iron piece rotates based on excitation and demagnetization of the electromagnet section to slide the card and drive the contact mechanism section.