JPH04126657U - contact piece - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to provide a contact piece that is short and easily deformed. [Structure] In a contact piece that has a contact point at one end and is attached to a base etc. at the other end and stands upright, the height dimension can be changed by providing the contact point at a position eccentric from the center line of the width dimension of the mounting base. This increases the effective spring length of the contact piece.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a contact piece, for example, a contact piece that constitutes a contact mechanism part of an electromagnetic relay. It is something.

0002

[Conventional technology]

Conventionally, as a contact piece, for example, as shown in FIG. There is a movable contact piece 1 which is fixed by pressing, and the terminal part 3 is press-fitted into the recess 5a of the base 5. Some can be erected by fixing them. Then, the movable contact piece 1 is movable. Since the contact point 2 is provided on the center line 4 of the width of the mounting base, it is possible to downsize the device. As a result, the effective spring length of the movable contact piece 1 becomes shorter.

0003

[Problem that the idea aims to solve]

However, as devices become smaller, the effective spring length of the movable contact piece 1 becomes shorter. Even if the movable contacts Since the amount of movement of 2, that is, the amount of deflection of movable contact piece 1 is the same, the amount of movement of movable contact piece 1 is the same. There was a problem in that a large driving force was required to drive 1.

0004 In view of the above problems, the present invention is effective even if the contact pieces have the same height dimension. The purpose is to provide a contact piece with a long spring length dimension that operates with a small driving force. Ru.

[0005]

[Means to solve the problem]

In order to achieve the above object, the electromagnetic relay according to the present invention has a contact at one end. , for a contact piece that is installed upright with the other end attached to a base etc., the width of the mounting base The contact point is provided at a position eccentric from the center line.

[0006]

[Effects of actions and ideas] Therefore, according to the present invention, the straight line distance from the center of the mounting base to the center of the contact point is However, it is longer than the conventional example in which the contact point is provided on the center line. For this reason, the effective spring length of the movable contact piece becomes longer, so the contact piece of the same height dimension However, it can be easily deformed and can be driven with a small driving force. Moreover, since the contacts are assembled in an eccentric position, the torsional action of the contact pieces is avoided. Therefore, the contacts roll into contact with each other, preventing contact welding. be.

[0007]

【Example】

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

[0008] 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.

[0009] 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, and 16, which can be assembled from the side to form the contact mechanism section 50, are staggered. They are arranged alternately.

0010 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.

[0011] 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.

0012 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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. It has the advantage that it can be used effectively and the device can be made smaller.

[0017] As shown in FIGS. 15 to 17, the contact mechanism section 50 includes a pair of bent fixed parts. Consisting of contact pieces 51, 52 and a movable contact piece 53, terminal portions 51b, 52 are provided at each lower end. b, 53b are caulked and fixed, and the center line of the width of each mounting base 51d, 52 Movable contacts 51a and 52 are located at positions eccentric from d and 53d by a predetermined distance, respectively. a, 53a, are provided. Therefore, there is a direct line from the center of the contacts 51a, 52a, 53a to the center of each mounting base. The line distance is longer than when the contact points are provided on the center lines 51d, 52d, and 53d. Therefore, the substantial effective spring length of each contact piece 51, 52, 53 becomes longer. For this reason Even if the height dimensions are the same, each contact piece can be driven with a small driving force. Moreover, due to the torsional action of each contact piece 51, 52, 53, the contacts roll against each other. This has the advantage that contact welding does not occur because the contacts contact each other while moving. Furthermore, the movable contact piece 53 has a guide hole 53c above the movable contact 53a. are doing.

[0018] 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.

[0019] 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. The insulation distance can be increased. Moreover, there is no need to provide a gate-shaped terminal like in the conventional example. Therefore, the width of the movable contact piece 53 can be increased, and the increased cross-sectional area allows current to flow. It has the advantage of having a low heat generation temperature.

[0020] As shown in FIGS. 18 and 19, the sliding card 60 is approximately rectangular 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. 20, 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. It is difficult to melt and is easy to assemble as evidenced by the assembly method described above. Therefore, 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. There is an advantage.

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

FIG. 17 is a cross-sectional view showing the attached state of the movable contact piece according to this embodiment.

FIG. 18 is a plan view of the card according to the present example.

FIG. 19 is a side view of the card according to the present example.

FIG. 20 is a perspective view showing a state in which the card according to this embodiment is attached.

FIG. 21 is a perspective view showing a state in which the card according to the present embodiment is attached.

FIG. 22 is a sectional view showing a state in which a contact piece is attached 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, 26... Yoke, 26a...
Horizontal part tip surface, 26b... positioning protrusion, 26c... first hinge point, 26d... second hinge point, 30... movable iron piece, 31... notch, 50... contact mechanism part, 51,
52...Fixed contact piece, 51a, 52a,...Fixed contact, 51
b, 52b...terminal part, 51d, 52d...center line, 53...
Movable contact piece, 53a... Movable contact, 53b... Terminal part, 53
d...Center line, 60...Card, 70...Case, 71...Protrusion.

Claims (1)

[Scope of utility model registration request] Claim 1: A contact piece that has a contact point at one end and is installed upright by attaching the other end to a base, etc., characterized in that the contact point is provided at a position eccentric from the center line of the width of the mounting base. contact piece.