JPH10208602A - High frequency switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To even the operating characteristic for opening and closing a contact, and to improve the magnetic efficiency, and to improve the dimensional accuracy by projecting a position regulating projection, which is positioned between a yoke and a movable iron piece and which locks a notch part formed in other end of the movable iron piece, from a base. SOLUTION: A pair of supporting walls 12, 13 are projected from opposite corner parts of a base main body 11 of a base 10. Upper ends of the supporting walls 12, 13 are formed with bearing grooves 12a, 13a for supporting a movable block 50 freely to be turned. A base part of the supporting wall 12 is formed with a positioning curved surface 12b as a turning fulcrum for a movable iron piece 40. An noncontinuous insulating wall is projected zigzag between the supporting walls 12, 13, and a position regulating projecting part 15 is projected near the insulating wall, and a positioning projection 16 is projected in parallel with the position regulating projection 15 from the base main body 11. A notch part 42 of the movable iron piece 40 is engaged with an upper end of the position regulating projecting part 15, and positioning of the movable iron piece 40 is regulated so that the predetermined space is left between a tip of a narrow width part 41 and a yoke 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency switch, and more particularly to a structure for supporting a movable iron piece on a yoke.

[0002]

2. Description of the Related Art Conventionally, as a high-frequency switch, for example, there is an electromagnetic relay described in Japanese Utility Model Laid-Open No. 2-20259. That is, as shown in FIG.
The roughly L-shaped movable iron piece 25 of the electromagnet section 20 lying on
The yoke 24 is rotatably supported at the distal end thereof via a hinge spring 26. Then, by applying a voltage to the coil 22 and rotating the movable iron piece 25 to press the rotating member 40 with the arm 25a, the rotating member 40 is rotated against the spring force of the return spring 50, Open and close contacts.

[0003]

However, in the above-described electromagnetic relay, since the shape of the movable iron piece 25 is complicated and the dimensional accuracy is low, the operating characteristics are likely to vary. Further, in order to prevent the arm 25a of the movable iron piece 25 from catching on the yoke 24, there is a problem that a large notch is formed at the edge of the yoke 24, the magnetic resistance is large, and the magnetic efficiency is low.

[0004] In view of the above problems, an object of the present invention is to provide a high-frequency switch having uniform operating characteristics and high magnetic efficiency.

[0005]

In order to achieve the above object, a high frequency switch according to the present invention has a base and a substantially L-shaped yoke fixed to one end of an iron core around which a coil is wound.
An electromagnet block positioned so that the leading edge of the yoke is perpendicular to the upper surface of the base; and an electromagnet block rotatably supported with the leading edge of the yoke as a fulcrum. A high-frequency switch comprising: a substantially L-shaped movable iron piece that contacts and separates an end portion based on excitation and demagnetization of the electromagnet block while driving a movable block at the other end portion to open and close a contact; A position regulating projection, which is located between the movable iron piece and the other end of the movable iron piece, protrudes from the base.

A notch may be formed in a portion of the other end of the movable iron piece which is locked to the position regulating projection.

An electromagnet block in which a substantially L-shaped yoke is fixed to one end of a base and an iron core around which a coil is wound, and the leading edge of the yoke is perpendicular to the upper surface of the base. And one end is connected to and separated from the other end of the iron core on the basis of excitation and demagnetization of the electromagnet block, while the other end is movable. , And a high-frequency switch comprising a substantially L-shaped movable iron piece that opens and closes a contact,
Of the opposing surfaces of the other end of the movable iron piece and the yoke,
An insulating film may be formed on either one.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention; FIG. The present embodiment generally includes a base 10, a fixed contact mechanism 20, an electromagnet block 30, a movable iron piece 40, a movable block 50, and a case (not shown).

The base 10 comprises a shallow box-shaped base body 11 made of a dielectric material (synthetic resin). A pair of support walls 12 and 13 are protruded from opposite corners of the base body 11 so as to face each other. Further, bearing grooves 12a, 1 for rotatably supporting a movable block 50 described later are provided at upper end portions of the support walls 12, 13.
3a are respectively formed. The support wall 12
The base has a curved curved surface 12b serving as a pivot point of the movable iron piece 40 described later.

Discontinuous insulating walls 14a, 14b, 14c and 14d are provided between the support walls 12 and 13 in a staggered manner. A position regulating projection 15 protrudes near the insulating wall 14b. Further, a positioning ridge 16 is provided on the base body 11 so as to be parallel to the position regulating projection 15.

As shown in FIGS. 1 and 6, fixed contact mechanism 20 has fixed contact terminals 21 and 22 having fixed contacts 21a and 22a, respectively, and common fixed contact 23.
a and 23b, and a shield plate 24. The fixed contact 21a and the common fixed contact 23b constitute a normally closed fixed contact mechanism, and the fixed contact 22a and the common fixed contact 23a constitute a normally open fixed contact mechanism.

As shown in FIG. 7, the shield plate 24 is formed by stamping a plate-shaped conductive material into a predetermined shape and pressing the same. A plurality of ground terminals 25 project downward on the same straight line. I have. At the base of the ground terminal 25, a wide portion 25a extending toward the fixed contact terminal is formed. The shield plate 24 is formed by bending bending end portions 26a, 26b and elongated gland tongue pieces 27a, 27b extending from both ends in a substantially U-shape. A locking claw 29 for locking a return spring 56 of the movable block 50 described later protrudes from an upper edge of the shield plate 24.

Next, the first bending process of the shield plate 24 is as follows.
As shown in FIGS. 8 and 9, the ground tongue pieces 27a, 2
The dies 60 and 61 are positioned at the base of the base 7b, and pressed to bend the ground tongues 27a and 27b. Next, as shown in FIGS. 10 and 11, the second bending is performed by positioning the dies 62 and 63 along the slits 28a formed in the bent portions of the bending ends 26a and 26b, and pressing and bending the dies 62 and 63. The bending operation is completed by bending the ends 26a and 26b (FIG. 1).
2).

In the present embodiment, the ground tongues 27a, 27
The bent position of 7b and the bent ends 26a, 26b are vertically displaced. For this reason, it is possible to dispose the mold 62 that forms the reference surface inside the bending ends 26a and 26b during the second bending. As a result, the bending ends 26a and 26b can be bent with higher dimensional accuracy than the conventional example. A connecting portion 28b for connecting the shield plate main body 24a and the bending ends 26a and 26b is provided over the slit 28a. Therefore, there is an advantage that the bending ends 26a and 26b can be bent accurately without causing twisting.

The fixed contact terminals 21 and 22, the lower ends of the common fixed contact terminals 23 and the ground terminal 2 of the shield plate 24 are inserted into terminal holes (not shown) of the base 10.
5, the fixed contact terminals 21, 22 and the lower ends of the common fixed contact terminals 23 and the ground terminal 25 are aligned on the same straight line (FIG. 6). Further, the wide portion 25 a of the ground terminal 25 protrudes from the bottom surface of the base 10. Further, fixed contacts 21a, 22a and common fixed contacts 23a, 23
b are insulating walls 14a, 14d and 14b, 14c
, Respectively, so that the fixed contacts 21a, 22
a and one-half of the common fixed contacts 23a and 23b are shielded to form a shield structure utilizing the so-called strip line principle.

The electromagnet block 30 has an iron core 33 having a substantially T-shaped cross section inserted into a center hole 32a of a spool 32 around which a coil 31 is wound. 33b (FIG. 2) is caulked and fixed to one end of a yoke 34 bent in a substantially L-shape.
The coil terminals 35, 35 are press-fitted into both end flange portions 32b, 32b of the spool 32, respectively, and the lead wires of the coil 31 are tied and soldered thereto.

The terminal holes 11a, 11a,
The coil terminals 35, 35 are press-fitted into 11a, respectively, and the yoke 34 is press-fitted between the projection 15 and the ridge 16, whereby the electromagnet block 30 is positioned at a predetermined position.

The movable iron piece 40 is made of a magnetic material bent in a substantially L-shape, and one end of the movable iron piece 40 is a narrow portion 41. A notch 42 is formed in the vicinity of the front end of the narrow portion 41.

Then, the movable iron piece 40 is fixed to a positioning curved surface 12 b formed at the base of the support wall 12 and the yoke 3.
4 between the tip edge. As a result, the outer corner of the movable iron piece 40 is in line contact with the curved surface 12b, while the inner corner is rotatably supported with the leading edge of the yoke 34 as a fulcrum. Part 33a
Can be contacted. Further, the notch 42 of the movable iron piece 40 can be engaged with the upper end of the protrusion 15, and the narrow portion 41 is formed.
The position of the movable iron piece 40 is regulated such that a predetermined gap is left between the tip of the armature and the yoke 34.

The movable block 50 comprises a movable base 51 and a return spring 56. The movable base 51 is formed by integrally molding movable contact pieces 53a and 53b at lower ends of ridges 52a and 52b extending downward from the front and back surfaces, respectively. Further, the movable base 51 has shaft portions 54, 54 protruding laterally at both end portions thereof. The shaft portion 54 forms a relief by forming a flat surface parallel to the upper and lower sides thereof, and unavoidable burrs are generated by resin molding on the flat surface, so that a smooth rotating motion can be obtained. ing. In addition, the movable base 51 has a pair of engaging projections 55, 55 protruding from the inward surface thereof.

The return spring 56 is formed by pressing a thin leaf spring material into a substantially U-shaped cross section, and has a pair of engagement holes 57, 57 and a protruding projection 58 formed on one surface thereof.
An elastic tongue 59 extends laterally from the remaining one side.

The ridges 52a, 52b of the movable base 51
During this time, the return spring 56 is positioned and mounted in a horse riding state, so that the engagement hole 57 is engaged with the engagement projection 55, and the movable block 50 is completed.

Next, the shaft 5 of the movable block 50
4 and 54 are formed in the bearing grooves 12a and 13a of the base 10.
, The movable block 50 is rotatably supported. As a result, the movable contact piece 53a faces the fixed contacts 21a and 23b or the ground tongue piece 27a alternately so as to be able to come and go. In addition, the movable contact piece 53b faces the fixed contacts 22a and 23a or the ground tongue piece 27b alternately so as to be able to come and go.

The movable block 50 is biased toward the electromagnet block 30 by locking the distal end of the elastic tongue piece 59 of the return spring 56 to the locking claw 29 of the shield plate 24 (FIG. 5). Therefore, the protrusion 58 of the return spring 56 presses against the narrow portion 41 of the movable iron piece 40. As a result, the movable contact piece 53a comes into contact with the fixed contacts 21a and 23b, while the movable contact piece 53b comes into pressure contact with the ground tongue piece 27b.

The movable block 50 of this embodiment is manufactured by integral molding and has high dimensional accuracy, so that a high-frequency switch with uniform operating characteristics can be obtained.

The case (not shown) has a box shape that can be fitted to the base 10, and a positioning protrusion for preventing floating is provided on a portion of the ceiling surface located immediately above the shaft portion 54 of the movable block 50. It is protruding. Then, when the case is fitted to the base 10 incorporating the internal components, the positioning projections face each other while leaving a small gap between the positioning projections and the flat surface of the shaft portion 54. Then, an assembly operation is completed by sealing the joint surface between the base 10 and the case with a sealant.

Next, the operation of the high-frequency switch having the above configuration will be described. When no voltage is applied to the coil 31 of the electromagnet block 30, the return spring 56
The movable block 50 is moved by the spring force of
It is urged to the zero side. Therefore, the movable contact piece 53a is in contact with the fixed contacts 21a and 23b, and the movable contact piece 53b is in contact with the ground tongue piece 27b. In this case, the position of the movable iron piece 40 pressed against the protruding protrusion 58 of the return spring 56 is regulated by the notch 42 engaging the upper end of the protrusion 15. For this reason, a predetermined gap is formed between the tip of the narrow portion 41 of the movable iron piece 40 and the yoke 34.

When a voltage is applied to the coil 31 to excite it, one end 43 of the movable iron piece 40 is attracted to the magnetic pole portion 33 a of the iron core 33. Therefore, the movable iron piece 40 rotates, and the narrow portion 41 presses the movable block 50 outward against the spring force of the return spring 56. As a result, the movable block 50 pivots outward about the shaft portion 54, and the movable contact piece 53a is separated from the fixed contacts 21a and 23b and contacts the ground tongue piece 27a. Further, the movable contact piece 53b is separated from the ground tongue piece 27b, and the fixed contact pieces 23a, 22
a, and one end 43 of the movable iron piece 40 is attracted to the magnetic pole portion 33 a of the iron core 33.

Next, when the application of the voltage to the coil 31 is released, the movable block 50 is rotated in the direction opposite to the above-mentioned rotation direction by the spring force of the return spring 56, and the movable contact piece 53a is fixed to the fixed contact 21a. , 23b, while the movable contact piece 53b contacts the ground tongue piece 27b, and returns to the original state.

In the present invention, the dielectric located on the back side of the fixed contact does not necessarily need to be an insulating wall protruding from the base, but may be a coating or sheet of a dielectric material laminated on the side of the shield plate. Good.

Further, the position of the movable iron piece 40 is not limited to the case where the movement is restricted through the protrusion 15 protruding from the base 10, and the tip of the narrow portion 41 or the contact surface of the yoke 34 is insulated. A predetermined gap may be formed by forming a coating.

[0032]

As is apparent from the above description, according to the high frequency switch of the first aspect of the present invention, the movable iron piece has a simple shape, not a complicated shape as in the conventional example. For this reason, not only its manufacture is facilitated, but also a high-frequency switch having high dimensional accuracy and little variation in operation characteristics can be obtained. Further, at the time of return, the other end of the movable iron piece is locked to the position regulating projection projecting from the base, and does not come into surface contact with the yoke. Therefore, in the initial stage of the operation process, there is no malfunction of the movable iron piece due to residual magnetism, and a smooth turning operation can be obtained. According to the second aspect, the notch provided at the other end of the movable iron piece engages with the position regulating projection of the base. For this reason, space can be saved only by the depth dimension of the notch, and a smaller high-frequency switch can be obtained. For example, if the maximum width of the high-frequency switch is about 10 mm, space can be saved by the depth of the cutout of the movable iron piece, that is, about 0.5 mm. According to the third aspect, since the insulating coating is formed on one of the opposing surfaces of the other end of the movable iron piece and the yoke, the other end of the movable iron piece does not directly contact the yoke. Therefore, as in the first aspect, in the initial stage of the operation process, there is no malfunction of the movable iron piece due to residual magnetism, and a smooth turning operation can be obtained. Further, since it is only necessary to form an insulating coating on the tip of the movable iron piece, production is easy. Furthermore, since the positioning accuracy of the movable iron piece with respect to the yoke is increased, there is an effect that a high-frequency switch having even more uniform operation characteristics can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a high-frequency switch according to the present invention.

FIG. 2 is a perspective view of the high-frequency switch shown in FIG.

FIG. 3 is a perspective view showing a base on which the contact mechanism and the movable block of FIG. 1 are assembled.

FIG. 4 is a perspective view showing a base on which the contact mechanism, the movable block, and the movable iron piece of FIG. 1 are assembled.

FIG. 5 is a plan view showing a base on which the contact mechanism, the movable block, the movable iron piece and the yoke of FIG. 1 are assembled.

FIG. 6 is a perspective view of the fixed contact mechanism shown in FIG.

FIG. 7 is a perspective view of the shield plate shown in FIG. 6 before pressing.

FIG. 8 is a perspective view showing a method of bending the ground tongue of the shield plate shown in FIG.

9 is a perspective view showing a method of bending the ground tongue of the shield plate shown in FIG.

FIG. 10 is a perspective view showing a method of bending the bending end of the shield plate shown in FIG.

11 is a perspective view showing a method of bending the bending end of the shield plate shown in FIG.

FIG. 12 is a perspective view showing the shield plate shown in FIG. 7 after bending.

FIG. 13 is a perspective view of a shield plate according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Base, 11 ... Base main body, 12, 13 ... Support wall, 12a, 13a ... Bearing groove, 14a, 14b, 1
4c, 14d: insulating wall, 15: position control projection, 16:
Positioning protrusion, 20: fixed contact mechanism, 21, 22, fixed contact terminal, 21a, 22a: fixed contact, 23: common fixed contact terminal, 23a, 23b: common fixed contact, 24: shield plate, 24a: shield plate Body, 25: ground terminal, 25a: wide portion, 26a, 26b: bending end, 27a, 27b: ground tongue, 28a: slit, 28b: connecting portion, 29: locking claw, 30: electromagnet block, 34 ... yoke, 40 ... movable iron piece, 41 ... narrow part,
42: Notch, 50: Movable block, 51: Movable table, 53a, 53b: Movable contact piece, 54: Shaft, 55:
Engagement projection, 56 ... return spring.

Claims (3)

[Claims] 1. A substantially L-shaped yoke is fixed to one end of a base and an iron core around which a coil is wound, and the end of the yoke is positioned so as to be perpendicular to the upper surface of the base. An electromagnet block is rotatably supported with a leading edge of the yoke as a fulcrum. One end of the yoke contacts and separates from the other end of the iron core based on excitation and demagnetization of the electromagnet block. A high frequency switch comprising a substantially L-shaped movable iron piece that drives a movable block and opens and closes a contact point. The high frequency switch is located between the yoke and the movable iron piece and locks the other end of the movable iron piece. A high-frequency switch, wherein a position regulating projection is provided on the base. 2. The high-frequency switch according to claim 1, wherein a notch is formed in a portion of the other end of the movable iron piece that is locked to the position regulating projection. 3. A substantially L-shaped yoke is fixed to one end of a base and an iron core around which a coil is wound, and the leading end of the yoke is positioned so as to be perpendicular to the upper surface of the base. An electromagnet block is rotatably supported with a leading edge of the yoke as a fulcrum. One end of the yoke contacts and separates from the other end of the iron core based on excitation and demagnetization of the electromagnet block. A high-frequency switch comprising a substantially L-shaped movable iron piece that drives a movable block and opens and closes a contact point, wherein the other end of the movable iron piece and the facing surface of the yoke,
A high-frequency switch having an insulating coating formed on one of the switches.