JPH04126654U - electromagnetic relay - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention provides an electromagnetic relay that has a long insulation distance, a low heat generation temperature, generates a large spring force, and is equipped with a contact mechanism consisting of contact pieces that can be easily adjusted. The purpose is to [Structure] A plurality of press-fit grooves 14, 15, 16 are formed in a staggered manner by alternately cutting out opposing side end surfaces of the base 10.
Terminal portions 51b, 52b, 53 of contact pieces 51, 52, 53
The contact pieces 51, 52, 53 are erected on the base 10 by press-fitting and fixing the contact mechanism part 50 from the side.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an electromagnetic relay, particularly to a contact piece mounting structure.

0002

[Conventional technology]

Conventionally, electromagnetic relays have been described, for example, in British Patent No. 2167902. There is something listed. That is, as shown in FIGS. 24 and 25, the hinge spring provided on the yoke 3a The electromagnet part 3, on which the approximately L-shaped movable iron piece 5 is rotatably assembled via the box-shaped case 4, is While the partition wall 1a protruding from the bottom of the case 1 is housed and fixed in the case 1, the A movable contact piece 7 and a fixed contact are attached to the bottom of the case 1 located on the opposite side of the electromagnet part 3. While assembling the piece 8, both ends are connected to the movable iron piece 5 and the movable contact piece 7. The tied cards 6 are supported so as to be slidable. And before In order to insulate the electromagnet part 3 from the movable contact piece 7 and the fixed contact piece 8, the electromagnet After attaching the insulating member 9 to the partition wall 1a side of the section 3, fit the base 2 to the case 1. This completes the assembly.

0003 Therefore, when the movable iron piece 5 rotates based on the excitation and demagnetization of the electromagnet part 3, , the upper end of the movable iron piece 5 presses one end surface of the card 6, and the pressed card 6 Slide and press the upper end of the movable contact piece 7 to rotate it, and the movable contact 7a contacts the fixed contact 8a.

0004

[Problem that the idea aims to solve]

However, in the conventional electromagnetic relay, the gate-shaped terminal portions 7c, 8c A movable contact piece 7 and a fixed contact piece each having contact pieces 7b and 8b integrated in the center thereof. 8 is erected so as to face the bottom surface of the case 1, the terminal portions 7c, 8c The insulation distance between them is short. Moreover, the contact pieces 7b, 8b are arranged in the center of the gate-shaped terminals 7c, 8c. Therefore, the width of the contact pieces 7b and 8b cannot be increased. Therefore, the contact pieces 7b, 8b Since the cross-sectional area of As the spring temperature increased, large spring force could not be obtained. Furthermore, both the movable contact piece 7 and the fixed contact piece 8 stand on the bottom of the box-shaped case 1. There is a problem in that adjustment work cannot be done after assembly.

[0005] In view of the above-mentioned problems, the present invention has a long insulation distance at the terminal part, a low heat generation temperature, and a large A contact piece that generates a large spring force and whose operation can be adjusted even after assembly. An object of the present invention is to provide an electromagnetic relay equipped with a contact mechanism section.

[0006]

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the electromagnetic relay according to the present invention is provided on opposite sides of the base. Insert the terminal part of the contact piece laterally into the multiple press-fit grooves that are cut out alternately on the end face and provided in a staggered manner. The contact mechanism is formed by press-fitting and fixing.

[0007]

[Effects of actions and ideas]

Therefore, according to the present invention, the contact pieces are alternately press-fitted and fixed into each press-fit groove of the base. By doing so, each contact piece is erected on the base. Therefore, the creepage distance between the terminal portions of each contact piece becomes long, and the insulation distance becomes long. Moreover, since there is no need for a gate-shaped terminal like in the conventional example, the width of the contact piece can be increased. This increases the cross-sectional area of the contact piece. Therefore, even if current is applied, the contact piece will not generate electricity. The heat temperature does not get high and the spring force is large. Furthermore, since the contact piece protrudes from the top surface of the base, the contact piece can be assembled to the base. This has the advantage that adjustment work can be carried out even after the adjustment has been made.

[0008]

【Example】

An embodiment of the present invention will be described below with reference to the accompanying drawings of FIGS. 1 to 23. Ru.

[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 rear opening of this cavity 12 is connected to the frame 11 as shown in FIG. It is sealed with an insulating wall 13. Furthermore, the base 10 is shown in FIGS. 3 and 4. As shown in FIG. The press-fit grooves 14, 15, 16, which are assembled from the side to form the contact mechanism section 50, are arranged in a staggered manner. are provided alternately.

[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 As shown in FIGS. 5 and 6, the yoke 26 has a horizontal end surface 26a. Positioning protrusions 26b, 26b are respectively protruded from the upper corner, and the positioning protrusions 26b, 26b protrude from the front of the collar portion 21. Furthermore, the yoke 26 is As shown in FIG. 10 and FIG. Accordingly, the lower side edge is defined as the first hinge point 26c of the movable iron piece 30, which will be described later. The central tip is a second hinge point 26d.

[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. Furthermore, the step The flange 21 of the pool 23 has coil terminals 27, 27 laterally attached to its opposing side end surfaces. A tangled portion 27a is press-fitted and fixed, and is located at the upper end of the coil terminal 27. The lead wire of the coil 24 is twisted and soldered to the wire.

[0014] As shown in FIGS. 7 and 8, the movable iron piece 30 is located at the center of the front of the flange 21. It has a planar shape that can be assembled, and the yoke 26 is located at both side edges near the lower end. Positioning notches 31, 31 that can be engaged with the determining protrusions 26b, 26b are provided. At the same time, a semicircular notch 32 is provided on the upper end surface.

[0015] As shown in FIG. 9, the notches 31, 31 are used to position the yoke 26. When engaged with the female protrusions 26b, 26b, the magnetic pole portion 25a of the iron core 25 is engaged. The moving iron pieces 30 face each other so as to be able to approach and separate.

[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] Then, as shown in FIG. 14, the movable iron piece 30 is assembled via the hinge spring 40. Inserting the found electromagnet part 20 into the cavity part 12 of the base 10 from the side. It can be assembled into one piece. According to this embodiment, the hinge spring 40 is disposed on the lower back side of the movable iron piece 30. Due to the movement of the movable iron piece 30, a dead space is created on the back side of the movable iron piece 30. Since it can be used effectively, it has the advantage that the device 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. 15 and 16). For this reason, the contacts 51a, Not only bending moment but also torsional moment acts on 52a and 53a. , good welding resistance. Moreover, the width dimension of each mounting base of the fixed contact pieces 51, 52 and the movable contact piece 53 is Since the contact point is provided at a position eccentric from the center line, the contact point is placed on the center line. The actual effective spring length of each contact piece is longer than if it were provided, and the There is an advantage that a short electromagnetic relay can be obtained. 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. As shown in Figures 17, 18 and 19, the shape is bent in consideration of material removal. It may also have the following.

[0019] Terminal portions 51b and 52b of fixed contact pieces 51 and 52 and movable contact piece 53 from the side into the press-fit grooves 14, 15, 16 provided in the base 10. By press-fitting them, the fixed contacts 51a and 52 are connected with the movable contact 53a in between. a is facing. According to this embodiment, the fixed contact pieces 51 and 52 and the movable contact piece 53 are pressed against the base 10. Since they are press-fitted and fixed into the grooves 14, 15, and 16 from the sides, there is no space between the terminals. Creepage distance is longer than conventional example. Moreover, there is no need for gate-shaped terminals like in conventional examples. , the width of each contact piece can be increased, so even when a large current is applied, the temperature of the contact piece heats up. It has the advantage that the spring force of the contact piece is low and the spring force of the contact piece is large.

[0020] As shown in FIGS. 20 and 21, the sliding card 60 has a substantially rectangular shape in plan view. It is made of a synthetic resin board with a rectangular fitting hole 61 in the center and engaging holes at both ends. The fasteners 62 and 63 are each insert-molded. and slide The formula card 60 has a pair of driving protrusions 64, 64 protruding from one end surface, and a The position regulating claw portion 62a of the locking fitting 62 protrudes from the other end surface. The pressing claw portions 63a, 63a of the locking metal fitting 63 and the long tongue portion 63b located therebetween. and stands out.

[0021] Then, as shown in FIG. 23, the long tongue portion 63b of the sliding card 60 is moved to the Insert into the guide hole 53c of the contact piece 53, and press the movable contact piece 53 with the pressing claws 63a, 63a. While pressing, position the position regulating claw part 62a in the notch part 32 of the movable iron piece 30. the guide protrusions 2 of the spool 23. 1b, 21b, the guide protrusion 21b, as shown in FIG. 21b is engaged with the step portions 64a, 64a of the protrusions 64, 64 with one touch, and the A card 60 is supported so as to be slidable. According to this embodiment, the locking fittings 62 and 63 are inserted into both ends of the card 60. Because of the shape, the card 60 is less likely to be thermally deformed or warped. Moreover, card 60 Even if the card 60 slides, the card 60 is connected to the movable contact piece 53 via the locking fitting 63. Because it is tied together, abrasion powder is not generated from the resin part as in the conventional example, and contact caused by abrasion powder is prevented. No contact defects occur. Furthermore, since the locking metal fitting 63 has a high melting point, the card 60 can be hot-melted. In addition to being difficult to melt, it is easier to assemble than the conventional example, as is clear from the assembly method described above. Since it is easy to do this, it has the advantage of improving productivity.

[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 may occur 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, the position of the ceiling surface of the case 70 is regulated through the protrusion 71. Even if an external force is applied to the top surface of the case 70, the ceiling surface of the case 70 will not bend. , the operation of the card 60 is not hindered. Moreover, if the gate of the molding die is placed on the axis of the protrusion 71, the molding This has the advantage of improving resin flow and moldability.

[0025] Note that the protrusion 71 provided on the case 70 touches the top surface of the frame 11 provided on the base 10. For example, the protrusion 71 may be brought into contact with the spool 23 of the electromagnet 20. Alternatively, a protrusion may be provided on the upper surface of the frame 11 so that the case 70 It may also be brought into contact with the ceiling surface. Furthermore, the card 60 has a notch instead of a fitting hole. It may be provided.

[0026] 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.

[0027] 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 is attached to the first hinge point 26c. It begins to rotate using the fulcrum as the fulcrum (Fig. 10), and midway through, the second hinge point 26d becomes the fulcrum. (FIG. 11), the upper end of the movable iron piece 30 is attached to the card 60. The tip surfaces of the girder protrusions 64, 64 are pressed. For this reason, the sliding card 60 is 2, the pressing claws 63a, 63a of the card 60 move to the right. Press the upper end of the touch piece 53. As a result, the movable contact piece 53 rotates, and the movable contact 5 3a switches from the fixed contact 51a to the fixed contact 52a.

[0028] 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 iron piece 30 is moved in the opposite direction to that described above. It rotates, the movable contact 53a switches, and returns to its original state.

[0029] According to this embodiment, as shown in FIGS. 10 and 11, the rotation support of the movable iron piece 30 is The point changes from the first hinge point 26c to the second hinge point 26d. As a result, the attraction force characteristics change (Figure 12), so the operating voltage is 50% of the rated voltage. Ru. This is possible if the tip end surface 26a of the yoke 26 is a smooth surface and the pivot point does not move. Compared to the conventional case (Fig. 13), the operating voltage has increased from 60% to 50% of the rated voltage. means to decrease. Therefore, if the first hinge point 26c is used as a fulcrum, In this case, a large initial driving force can be obtained with a low voltage, so power consumption can be saved. Furthermore, since the width of each contact piece can be made larger than the conventional example, the spring force This has the advantage that larger contact pressure and contact separation force can be obtained than in the conventional example.

[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 a plan view of the base according to this embodiment.

FIG. 4 is a sectional view of a main part of the base according to the present embodiment.

FIG. 5 is a plan view of the yoke according to this embodiment.

FIG. 6 is a side view of the yoke according to this embodiment.

FIG. 7 is a front view of the movable iron piece according to the present example.

FIG. 8 is a side view of the movable iron piece according to the present example.

FIG. 9 is a perspective view showing the assembled state of the movable iron piece according to the present embodiment.

FIG. 10 is an explanatory diagram of the operation of the movable iron piece according to the present embodiment.

FIG. 11 is an explanatory diagram of the operation of the movable iron piece according to the present embodiment.

FIG. 12 is an attractive force characteristic diagram of the electromagnetic relay according to the present example.

FIG. 13 is an attractive force characteristic diagram of an electromagnetic relay according to a comparative example.

FIG. 14 is an explanatory diagram for assembling the electromagnet section according to the present embodiment.

FIG. 15 is a cross-sectional view showing the attached state of the fixed contact piece according to this embodiment.

FIG. 16 is a front view of the movable contact piece according to this embodiment.

FIG. 17 is a cross-sectional view showing how another fixed contact piece is attached according to the present embodiment.

FIG. 18 is a sectional view showing a state in which another fixed contact piece is attached according to the present embodiment.

FIG. 19 is a cross-sectional view showing how another movable contact piece is attached according to the present embodiment.

FIG. 20 is a plan view of the card according to this embodiment.

FIG. 21 is a side view of the card according to the present example.

FIG. 22 is a perspective view showing a state in which the card according to this embodiment is attached.

FIG. 23 is a perspective view showing a state in which the card according to this embodiment is attached.

FIG. 24 is a sectional view of a conventional electromagnetic relay.

FIG. 25 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, 14, 15, 16... Press fit groove, 11... Frame body, 12... Cavity part, 13... Insulating wall, 20... Electromagnet part, 2
3...Spool, 24...Coil, 25...Iron core, 25a...Magnetic pole part, 26...Yoke, 26a...Horizontal part tip surface, 26b...
Positioning protrusion, 26c...first hinge point, 26d...
Second hinge point, 30... Movable iron piece, 31... Notch part, 50... Contact mechanism part, 51, 52... Fixed contact piece, 51
a, 52a... Fixed contact, 51b, 52b... Terminal part, 53
...Movable contact piece, 53a...Movable contact, 53b...Terminal part, 6
0...Card, 70...Case, 71...Protrusion.

Claims (1)

[Scope of utility model registration request] Claim 1: A contact mechanism part is formed by press-fitting and fixing the terminal part of the contact piece from the side into a plurality of press-fitting grooves formed in a staggered manner by alternately cutting out the opposing side end surfaces of the base. Features of electromagnetic relay.