JPH1064395A - High frequency switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency switch easy to manufacture by connecting and integrating a pair of movable bases of the same form having movable contact pieces insert-molded therein as a movable block. SOLUTION: A pair of movable bases 51, 52 having the same form have movable contact pieces 51b, 52b insert-molded in the lower end parts of protruding parts 51a, 52a, respectively. The bases 51, 52 have shaft parts 53 protruded on one-end parts, and an engaging projection part 54 is protruded on the other end parts. A recessed part 55 to be fitted to the projection part 54 is formed on the base part of the projection part 54, and it has a through hole 55a for press fitting a projection 54a formed on the projection part 54. The projection part 54 of the base 51 is fitted to the recessed part 55 of the base 52 and positioned, the projection 54a is press fitted to the through hole 55a and temporarily fixed, and both the bases 51, 52 are then bonded and integrated together by adhesive or high frequency welding. The nipping part 57 of a return spring 56 is provided on the upper edge part of the bases 51, 52, whereby a movable block 50 is formed.

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 of a movable block thereof.

[0002]

2. Description of the Related Art Conventionally, as a high-frequency switch, there is, for example, one disclosed in Japanese Utility Model Publication No. 6-38354.
That is, a box-shaped shield case is installed on a substrate on which a fixed contact member is insert-molded on the same straight line, and a movable contact member insert-molded on a rotating member at the upper end of the fixed contact member protruding from the bottom surface of the shield case. Is a high-frequency switch that opens and closes the high-frequency current circuit by connecting and disconnecting the switches.

[0003]

However, in the above-described high-frequency switch, the two movable contact members are arranged in parallel, and the ends that come into contact with the central common fixing member face each other. For this reason, it is not easy to insert-mold two movable contact members on the rotating member body at the same time, and there is a problem that it takes time to manufacture parts.

[0004] In view of the above problems, an object of the present invention is to provide a high-frequency switch in which a movable block can be easily manufactured.

[0005]

In order to achieve the above object, a high-frequency switch according to the present invention has a movable block which pivots on shafts projecting from both ends based on excitation and demagnetization of an electromagnet block. In the high-frequency switch that opens and closes a contact, the movable block is formed by combining and integrating a pair of movable bases having the same shape in which a movable contact piece is insert-molded.

[0006] The movable base may be formed with through-holes and projections sized to be press-fittable to each other, and the movable base may be provided with engaging projections and recesses sized to be fitted to each other. It may be formed. Further, the joint surfaces of the movable tables may be integrated by high frequency welding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, 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 60.

The base 10 has support walls 12 and 13 protruding from opposite flat corners of a flat base body 11 made of a dielectric material (synthetic resin) so as to face each other. Walls 14, 15, 16, 17 are protruded. Bearing grooves 12a and 13a for rotatably supporting a movable block 50 to be described later are formed at upper end portions of the support walls 12 and 13, respectively. In addition, a positioning projection 18 having an arcuate surface serving as a rotation fulcrum of a movable iron piece 40 described later is formed at the base of the support wall 13.

The fixed contact mechanism 20 includes fixed contacts 21a and 2a.
2a having the same shape and having fixed contact terminals 21 and 2a respectively.
2. It comprises a common fixed contact terminal 23 having fixed contacts 23a and 23b and a shield plate 24. Especially,
The fixed contact 21a and the common fixed contact 23a constitute a normally open fixed contact mechanism, and the fixed contact 22a and the common fixed contact 23b constitute a normally closed fixed contact mechanism. As shown in FIGS. 6 and 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 are arranged on the same straight line on the lower side. Ground tongue pieces 26a and 26b are formed by projecting and extending both side end parts inwardly. Further, a locking claw 27 for locking a return spring 56 of the movable block 50 described later protrudes from an upper end edge of the shield plate 24.

When the fixed contact terminals 21 and 22, the lower end of the common fixed contact terminal 23 and the ground terminal 25 of the shield plate 24 are pressed into the terminal holes of the base 10, as shown in FIG. Contact terminals 21, 22,
Lower end of common fixed contact terminal 23 and ground terminal 25
Are aligned on the same straight line. Further, the fixed contact 21
a, 22a and 23a, 23b abut against the side surfaces of the insulating walls 14, 17 and 15, 16 respectively.
One half of the fixed contacts 21a, 22a and 23a, 23b is shielded, so that a shield structure utilizing the so-called strip line principle is obtained.

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. The portion 33b is caulked and fixed to one end of a yoke 34 bent in a substantially L-shape. A coil terminal 35 is press-fitted into the flange 32b of the spool 32, and a lead wire of the coil 31 is tied and soldered to the coil terminal 35. And the base 10
By pressing the coil terminal 35 into the terminal hole 11a, 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. The movable iron piece 40 is rotatably supported around the inner surface of the positioning projection 18 by assembling and positioning the movable iron piece 40 from above on the positioning projection 18 projecting from the upper surface of the base. One end 42
Can contact the magnetic pole portion 33a of the iron core 33.

The movable block 50 is, as shown in FIG.
It comprises a pair of movable tables 51 and 52 having the same shape, and a return spring 56. The movable tables 51 and 52
Movable contact pieces 51b and 52b are insert-molded at the lower ends of the ridges 51a and 52a extending downward from the side surfaces. The movable bases 51 and 52 have a shaft 53 protruding laterally at one end thereof and an engaging projection 54 protruding laterally at the other end thereof. The shaft 5
3 forms a relief by forming flat surfaces 53a and 53b which are parallel to the upper and lower sides thereof, and produces unavoidable burrs on the flat surfaces 53a and 53b by resin molding, so that a smooth rotation operation can be obtained. It is like that. At the base of the engaging projection 54, a concave portion 55 having a shape to be fitted therein is formed. Further, the protrusion 54 is formed with a protrusion 54a that is press-fitted into a through hole 55a formed in the recess 55 to be fitted. Then, the projection 54 of the movable table 51
Are fitted into the recesses 55 of the movable base 52 and positioned, and the projections 54a and the through holes 55a of the movable base 51 are pressed into the through holes 55a and the projections 54a of the movable base 52, respectively, and temporarily fixed. And integrated by high-frequency welding or the like.

Further, movable tables 51 and 52 which are integrally joined.
The movable block 50 is completed by attaching the holding portion 57 of the return spring 56 to the upper edge of the movable block in a horse riding state. According to the present embodiment, movable tables 51 and 52 having the same shape.
Is advantageous in that resin molding is simplified and a mold is easily manufactured.

Next, the shaft 5 of the movable block 50
3 and 53 are formed into bearing grooves 12a and 13a of the base 10.
The movable block 50 is rotatably supported in the thickness direction. Thus, the movable contact piece 51b alternately contacts and separates from the fixed contacts 21a and 23a or the ground tongue piece 26a, while the movable contact piece 52b alternately contacts and separates from the fixed contacts 22a and 23b or the ground tongue piece 26b. Oppose. Then, the movable block 50 is biased toward the electromagnet block 30 by locking the distal end of the return spring 56 to the locking claw 27 of the shield plate 24.

The case 60 has a box shape that can be fitted to the base 10, and the movable block 5
A positioning projection 61 for preventing floating is protruded from a portion located immediately above the 0 shaft portion 53 (FIG. 2). And
When the case 60 is fitted to the base 10 incorporating the internal components, the positioning projections 61 face each other while maintaining a small gap between the positioning projections 61 and the flat surface 53 a of the shaft portion 53. Then, the joining surface between the base 10 and the case 60 is sealed with a sealant, whereby the assembling operation is completed.

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
The movable contact piece 51b is in contact with the ground tongue piece 26a, and the movable contact piece 52b is in contact with the fixed contacts 23b and 22a.

When a voltage is applied to the coil 31 to excite it, one end 42 of the movable iron piece 41 is attracted to the magnetic pole portion 33a 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 rotates about the shaft 53 as a fulcrum, and the movable contact piece 51
b is separated from the ground tongue piece 26a and the fixed contacts 21a,
23a, while the movable contact piece 52b contacts the fixed contact 2
3b, 22a, and comes into contact with the ground tongue piece 26b.
Adsorb to 3a.

Then, when the application of the voltage to the coil 31 is released, the movable block 50 is rotated by the spring force of the return spring 56 in a direction opposite to the above-mentioned rotation direction, and the movable contact piece 51b is moved to the ground tongue piece 26a. , While the movable contact piece 52b contacts the fixed contacts 23b and 22a to return to the original state.

The dielectric located on the back of the fixed contact does not necessarily have to be an insulating wall protruding from the base, but may be a coating or sheet made of a dielectric material integrated on the side surface of the shield plate. .

[0021]

As is apparent from the above description, according to the high frequency switch according to the first aspect of the present invention, the movable block having the desired shape is obtained by combining and integrating the same-shaped movable base. Can be formed. For this reason, it is not necessary to form a movable block having a complicated shape as in the conventional example in a single operation, so that the production becomes easy and the production cost can be reduced. According to the second aspect, the temporary fixing can be performed via the through-holes and the protrusions that can be press-fitted to each other, so that the assembly is facilitated and the productivity is improved. According to the third aspect, since the pair of movable tables can be positioned through the mutually engageable protrusions and recesses, productivity is further improved. According to the fourth aspect, since the joining surfaces are welded by high frequency, there is an effect that the assembly can be performed without a gap in a short working time.

[Brief description of the drawings]

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

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

FIG. 3 is a perspective view of the high-frequency switch shown in FIG. 1;

FIG. 4 is a perspective view showing a state where an electromagnet block is removed from FIG. 3;

FIG. 5 is a plan view of FIG. 4;

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

FIG. 7 is a front view of FIG. 6;

8 is an enlarged exploded perspective view of the movable block shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Base, 11 ... Base main body, 12, 13 ... Support wall, 12a, 13a ... Bearing groove, 14, 15, 16,
17 ... insulating wall, 18 ... positioning projection, 20 ... fixed contact mechanism, 21, 22 ... fixed contact terminal, 21a, 22a ... fixed contact, 23 ... common fixed contact terminal, 23a, 23b ... fixed contact, 24 ... shield Board, 25 ... Ground terminal, 26
a, 26b: ground tongue piece, 27: locking claw, 30: electromagnet block, 40: movable iron piece, 50: movable block, 5
1, 52: movable table, 51b, 52b: movable contact piece, 53
... Shafts, 53a, 53b ... Flat surfaces, 54 ... Protrusions for engagement,
54a: protrusion, 55: recess, 55a: through hole, 56: return spring, 57: holding portion, 60: case.

Claims (4)

[Claims] 1. Based on excitation and demagnetization of an electromagnet block,
In a high-frequency switch that opens and closes a contact point with a movable block that rotates about a shaft portion protruding at both ends, a pair of movable tables having the same shape in which the movable block is insert-molded with a movable contact piece are combined and integrated. A high-frequency switch characterized by being formed by: 2. The movable base is formed with a through-hole and a protrusion having a size that can be press-fitted to each other.
2. The high-frequency switch according to item 1. 3. The high-frequency switch according to claim 1, wherein the movable base is formed with an engaging projection and a recess having dimensions that can be fitted to each other. 4. The high-frequency switch according to claim 1, wherein the joint surfaces of the movable tables are integrated by high-frequency welding.