JP2004095364A - Coaxial switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial switch capable of miniaturizing a base and a sub-base without changing the size of a contact spring for use and dispersing stress due to the clamping down of the contact spring. <P>SOLUTION: The contact springs 15 are arranged in adjacency on the surface of a metal sub-base 8 by making central pieces 15a cross concave grooves 80 with both end directions of the central pieces 15a aslant at 45° to both end directions of the concave grooves 80 in which contacts 5 are housed in correspondence with drive bodies 16 linked to the central pieces 15a, and by setting a fitting direction so that a line connecting fixed parts of the both sides crosses a line connecting fixed parts of the adjacent contact spring 15. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coaxial switch used for switching between a microwave and a line.
[0002]
[Prior art]
As this type of coaxial switch, as shown in FIG. 9 (a), a metal base 8 having four concave grooves 80 formed on the surface so as to correspond to each side of the square, and a back surface side of the metal base 8 is provided. As shown in FIG. 9 (b), the respective mounting holes 10 are attached from the back side of the metal base 8 so as to project through the respective central conductors 7 into the connecting portions. The coaxial connector 6 and the coaxial connectors 6 are connected at both ends to the ends of the central conductors 7 and 7 of the coaxial connectors 6 and 6 located at the connecting portions corresponding to both ends of each concave groove 80. There is a coaxial switch that includes a contact 5 that is movably disposed in a concave groove 80 so as to be freely contactable and disengageable with respect to the distal end surface of the central conductor 7.
[0003]
In this coaxial switch, as shown in FIG. 9B, the metal sub-base 4 is placed on the surface of the metal base 8 so as to cover the opening of each concave groove 80 on the surface of the metal base 8. The other end of the driving body 16 having one end connected to the center of each contact 5 is passed through the metal sub-base 4 so as to be movable in the axial direction on the surface side, and a contact spring 15 connected to the other end. Thus, the drive body 16 is urged upward, and the drive body 16 is pushed and driven against the urge of the contact spring 15, so that both ends of the corresponding contact 5 are respectively connected to the corresponding coaxial connectors 6, 6. The contactors 15 are brought into contact with the front end surfaces of the center conductors 7 and 7 and the driving force is released by lifting the driving body 16 by the restoring force of the contact spring 15 so that both ends of the contact 5 correspond to the coaxial connectors 6 and 6 respectively. Of the central conductor 7, So that the cells from the end face opens released.
[0004]
Here, as shown in FIG. 9C, the contact spring 15 is a plate spring having a planar shape, and the central portion of the central piece 15 a serves as a connecting portion that connects the other end of the driving body 16. The fixing screw 17 is inserted into an insertion hole (not shown) provided in the center of each of the pair of side pieces 15b, 15b parallel to the central piece 15a, and both sides of the fixing portion of each side piece 15b are In addition to inclining in a direction away from the surface of the metal sub-base 4, both sides of the connecting portion of the central piece 15 a are inclined in the direction of the surface of the metallic sub-base 4 to connect both ends of the central piece 15 a. The pair of side pieces 15c, 15c are floated from the surface of the metal sub-base 4.
[0005]
[Problems to be solved by the invention]
By the way, conventionally, the contact spring 15 corresponding to each driving body 16 has the metal sub-base 4 so that the both ends of the center piece 15a are in the same direction as the both ends of the groove 80, and the center piece 15a is positioned above the groove 80. Since the adjacent contact springs 15 do not overlap each other as shown in FIG. 10, at least adjacent contacts 15 are disposed between the contact springs 15 and 15 corresponding to the recessed grooves 80 and 80 parallel to each other. It is necessary to secure space so as not to overlap.
[0006]
As a method of securing this space, a method of reducing the size of each contact spring 15 is conceivable. However, in this case, since necessary spring characteristics cannot be secured, conventionally, the distance between both ends of the concave groove 80 is increased to be adjacent. The space which can arrange | position the contact springs 15 and 15 arrange | positioned without overlapping is ensured. Therefore, the size of the contact 5 becomes long, and there is a problem that the entire size including the base 8 and the sub-base 4 is inevitably increased.
[0007]
Further, there is a problem that stresses due to tightening of the fixing screws 17 are concentrated because there are fixing portions by the four fixing screws 17 on the same straight line.
[0008]
The present invention has been made in view of the above-mentioned problems, and its object is to reduce the size of the base and sub-base without changing the dimensions of the contact spring used, and by tightening the contact spring. It is an object of the present invention to provide a coaxial switch capable of distributing stress.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a metal base having four concave grooves formed on the surface so as to correspond to each side of a square, and the ends of adjacent concave grooves are connected to each other. Four coaxial connectors attached from the back side of the metal base to the respective mounting holes penetrating into the site and the back side of the metal base, and projecting the respective central conductors into the connection site, and the concave grooves The both ends of the pair of central conductors located at both ends of the center conductor are moved into the respective concave grooves so that both ends can be contacted and separated from the front end surfaces of the corresponding central conductors. One end is connected to four contacts that are freely housed, a metal sub-base placed so as to cover the opening of each concave groove on the surface of the metal base, and a central portion of each contact. The other end is pivoted to the surface side of the metal sub-base Four drive bodies that are movably penetrated in the direction and arranged on the surface of the metal sub-base so as to correspond to each of the drive bodies, and urge the corresponding drive body above the surface of the metal sub-base. In a coaxial switch that includes a contact spring, and pushes and drives the drive body against the biasing force of the contact spring so that both ends of the corresponding contact come into contact with the front end surface of the corresponding central conductor, respectively.
Each of the contact springs is configured by a leaf spring having a planar shape in a planar shape, and a central portion of the central piece serves as a connecting portion for connecting the other end of the driving body, and a pair of sides parallel to the central piece. Each central part of the piece is a fixing part that is fixed to the surface of the metal subbase with a fixing screw,
In addition, both side portions of the fixing portion of each side piece are inclined in a direction away from the surface of the metal subbase, and both side portions of the connecting portion of the center piece are inclined in the direction of the surface of the metal subbase. A pair of side pieces connected at both ends are formed so as to float above the surface of the metal sub-base,
The central piece is formed into the concave groove so that both end directions of the central piece are inclined by approximately 45 ° with respect to both end directions of the concave groove in which the contact corresponding to the driving body connected to the central piece is accommodated. Each contact on the surface of the metal sub-base with the mounting direction set so that the line connecting the fixed parts on both sides intersects perpendicularly to the line connecting the fixed parts on both sides of the adjacent contact spring. It is characterized by comprising a spring.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to an embodiment.
[0011]
The coaxial switch according to the present embodiment constitutes a coaxial relay that drives a contact using a drive mechanism including a polarized electromagnetic mechanism, and an electromagnetic block 22 and an armature block 23 are incorporated in a frame 27 as shown in FIG. A metal sub-base 4 provided with two sets of drive mechanism blocks 1 and contact blocks 3a and 3b provided corresponding to each drive mechanism block 1 and driven by the armatures 2 of the respective armature blocks 23, respectively. And a high-frequency block comprising a metal base 8 screwed with SMA type coaxial connectors 6... Each comprising a fixed contact which is opened and closed by each contact 5 of the contact blocks 3a and 3b on the upper end surface of the center conductor 7, and a drive mechanism. An excitation circuit and an indicator circuit of block 1 are provided, and a substrate block 26 disposed above the drive mechanism block 1 and a lower surface opening are provided. For example consisting of a metal box-shaped cover 9.
[0012]
The configuration of the present embodiment will be described in more detail. The metal base 8 is formed by cutting into a substantially square planar shape, and each side of the metal base 8 is located at the center of the upper surface as shown in FIG. Four sets of concave grooves 80 are formed in parallel with each other, and the longitudinal directions of the adjacent concave grooves 80 and 80 are 90 ° to each other, and the respective ends are connected to form a square annular groove as a whole. ing. Then, four mounting holes 10 are shown in FIG. 1B from the back surface (lower surface) to the front surface (upper surface) of the metal base 8 so as to correspond to the corners of the annular groove portion that is a connecting portion of the concave grooves 80, 80. So as to penetrate. These mounting holes 10 have a female threaded portion 10a formed at the bottom.
[0013]
SMA type coaxial connectors 6 are respectively screwed into the female screw portions 10a of the mounting holes 10 from the back side of the metal base 8, and the central conductors 7 of the coaxial connectors 6 are connected to the concave grooves through the upper end openings 10b of the holes 10, respectively. It protrudes into the connecting portion at the end of 80. The upper end surfaces of these central conductors 7 are at the same height and constitute a fixed contact.
[0014]
As shown in FIG. 1B, the coaxial connectors 6... Are made of a metal cylindrical outer shell conductor 11 having a male screw portion on the outer periphery, and a fluororesin insulator 12 inserted into the outer shell conductor 11. And a central conductor 7 inserted into the central through hole of the insulator 12 and having the tip projecting outward, and a constriction formed near the base of the projecting portion of the central conductor 7 are press-fitted into the central hole, The sub-bushing 13 made of annular PCTFE (ethylene trifluoride) is press-fitted into the upper end opening of the outer shell conductor 11, and the diameter of the upper end opening 10b is substantially the same as the outer diameter of the sub-bushing 13. The inner diameter.
[0015]
The sub-base 4 is formed by punching a metal plate. When the sub-base 4 is mounted at a fixed position on the base 8 as shown in FIG. A through-hole 14 that penetrates vertically is formed at a position corresponding to the middle between the central conductors 7 and 7 of the coaxial connectors 6 and 6. In this through hole 14, an LPC (fully aromatic liquid crystal polymer) resin driving body 16, which has an upper end thermally bonded to a contact spring 15 disposed on the upper surface side of the sub-base 4 and is always urged upward, is moved up and down. It is inserted freely when moving in the direction.
[0016]
The drive body 16 has a central portion of a contact 5 made of a flat conductor formed by insertion (simultaneous) molding at the lower end of the sub-base 4 projecting to the lower surface side, as shown in FIG. In addition, contact blocks 3a or 3b are respectively configured.
[0017]
Here, the contact blocks 3a and 3b corresponding to the concave grooves 80 and 80 located on both sides of a pair of diagonal lines (vertical center line in FIG. 1C) are driven by one drive mechanism block 1. Therefore, the contacts 5 of the pair of contact blocks 3a and 3b move up and down in the concave groove 80 of the base 8 as the driving body 16 moves up and down. The contact 5 faces the upper end surfaces of the central conductors 7 and 7 of the coaxial connectors 6 and 6 projecting into both end portions of the corresponding concave groove 80 as shown in FIG. Is moved between the coaxial connectors 6 and 6 by contacting the upper end surfaces of the center conductors 7 and 7 of the coaxial connectors 6 and 6. And the said contact by the contact 5 of both contact blocks 3a and 3b is switched by the armature 2 of the corresponding drive mechanism block 1 alternately.
[0018]
Further, the contacts 5 and 5 that are separated from the upper end surface of the center conductor 7 of the same coaxial connector 6 are formed in a substantially right triangle shape with the end portion 5a positioned so that the outer edge tip is ahead of the inner edge tip. The oblique sides of the end portions 5a of the contacts 5 and 5 are made to face each other in parallel.
[0019]
The contact spring 15 for urging the drive body 16 of the contact block 3a or 3b has the same shape and size as the conventional example formed into a Japanese character shape as shown in FIG. A leaf spring is used.
[0020]
As in the prior art, both sides of the central portion are bent obliquely downward and parallel to the central piece 15a so that the central portion of the central piece 15a is positioned higher than both ends as shown in FIG. 1B. Both side portions 15b, 15b are bent obliquely upward so that the central portion is positioned lower than both ends, and the driver 16 is inserted into the insertion hole 18 provided in the central portion of the central piece 15a from below. The fixing screw 17 is inserted from above through an insertion hole (not shown) provided at the center of the both side pieces 15b, 15b. Then, the fixing screw 17 penetrating through the center part of the both side pieces 15b, 15b is screwed into the screw hole 21 on the base 8 side through an insertion hole (not shown) for forming the sub base 4 to be fastened. The base 4 is fixed together with the base 8, and the fixing screw 17 is also used as a fixing screw for the sub-base 4 to improve workability.
[0021]
As described above, since the contact spring 15 can be stably pushed upward, it is not necessary to restrict the direction of the driving bodies 16 and 16 of the contact blocks 3a and 3b by the through holes 14 of the sub-base 4. By increasing the gap between the hole 14 and the inner surface, friction at this portion can be eliminated, and the resulting operation becomes more stable.
[0022]
Here, as shown in FIG. 1 (c), the contact springs 15 corresponding to the contact blocks 3 a and 3 b are arranged so as to be inclined by approximately 45 ° with respect to both end directions of the concave groove 80 and intersect the concave groove 80. In addition, the insertion positions of the fixing screws 17 between the adjacent contact springs 15 are adjacent to each other so as not to deteriorate the tightening workability, and the lines connecting the insertion positions of the fixing screws 17 on both sides are fixed so as to be approximately 90 °. Yes.
[0023]
With such an arrangement of the contact springs 15..., The adjacent contact springs 15 of the present embodiment can be connected to each other even if the distance between both ends of the concave groove 80 is shortened as compared with the prior art while using the same contact spring 15 as in the past. As a result, the entire structure including the base 8 and the sub-base 4 can be made smaller than the conventional one. Further, the fastening points by the fixing screw 17 can be two places on the same straight line, and the stress due to the fastening can be distributed as compared with the conventional case.
[0024]
As shown in FIG. 4, the drive mechanism block 1 includes an electromagnetic block 22, an armature block 23 including an armature 2 and an armature spring 19, and an electromagnetic block 22 and a frame 27 that holds the armature block 23. Is done.
[0025]
As shown in FIG. 5, the electromagnetic block 22 that is a main component of the drive mechanism block 1 includes a yoke 29, two sets of exciting coil portions 30, a permanent magnet 32, and the like. The yoke 29 is formed by punching and bending a magnetic material such as magnetic soft iron, a flat plate portion 29a, and a hanging piece portion 29b bent downward from the central portion in the longitudinal direction of the flat plate portion 29a. The upper end of the iron core 31 of the exciting coil part 30 is inserted into holes provided at both end positions symmetrical from the longitudinal center of the flat plate part 29a, respectively, and is fixed by caulking, whereby the exciting coil part 30 is suspended. The permanent magnet 32 is bridged between the lower ends of the drooping pieces 29b and 29b to form a bistable polarized electromagnet structure.
[0026]
This arrangement is achieved by positioning the permanent magnet 32 together with the plate width of the hanging piece portion 29b and by engaging the upper end edges of the plate-like permanent magnet 32 with the stepped portion 34 at the lower end of the hanging piece portion 29b. It is done by doing.
[0027]
Here, the center of the hanging piece 29b coincides with the center of the flat plate portion 29a, and the distance from the center to both side edges is equal to each other. In this embodiment that constitutes a latching relay, the hanging piece 29 is a hanging piece. A portion having a width over both side edges of the portion 29b and having magnetic poles on the upper and lower surfaces is used.
[0028]
The exciting coil unit 30 is configured by winding an exciting coil 35 around a coil bobbin 33 having an iron core 31 inserted therein, and a pair connected to both ends of the exciting coil 35 from a flange 33a on the upper side of the coil bobbin 33 of each exciting coil unit 30. The coil terminals 36 and 36 are projected. The coil terminals 36, 36 extend upward from the protruding base end and protrude upward from the flat plate portion 29 a of the yoke 29.
[0029]
Further, a fixing base 33c for fixing the lower portion of the indicator terminal 37 is provided at the outer end of the lower flange portion 33b to support the indicator terminal 37.
[0030]
These indicator terminals 37 and 37 are extended in parallel using the empty space of the electromagnetic block 22, and the upper part is between the protruding portions of the coil terminals 36 and 36 of the upper flange 36a. The upper end protrudes upward from the flat plate portion 29 a of the yoke 29 in a retained form.
[0031]
The pair of indicator terminals 37, 37 are bent and protruded at both lower ends to form fixed contact pieces 38, 38, and an indicator spring 39 attached to the pair of fixed contact pieces 38, 38 and the upper surface of the armature 2. When the armature 2 is rotated, the movable contact pieces 40, 40 on both sides of the movable contact pieces 40, 40 come into contact with the fixed contact pieces 38, 38 on both sides, for example, as shown in FIG. The fixed contact pieces 38, 38 are turned on through the indicator spring 39, and a signal indicating the on / off state between the pair of coaxial connectors 6, 6 by the contact 5 of the contact block 3a or 3b can be taken out. It can be done.
[0032]
The indicator spring 39 is fixed by welding the plate surface to the upper surface of the end portion of the armature 2 that is attracted and opposed to the magnetic pole surface at the lower end of the iron core 31 of the exciting coil portion 30 and also serves as a rejuvenating plate. Yes. The movable contact piece 40 is gold-plated or inlaid in a tape shape.
[0033]
The armature block 23 includes the armature 2 made of a magnetic material, the above-described indicator spring 39 fixed to the upper surface of both ends of the armature 2 by welding, and the armature spring 19 attached to the lower surface. Reference numeral 19 denotes a central piece 19b formed in a direction orthogonal to the longitudinal direction of the armature 2 as shown in FIG. 4 (c), and parallel to the longitudinal direction of the armature 2 from both sides of the center of the central piece 19b. The center piece 19b is formed in a substantially U-shaped cross section so as to protrude upward, and a dowel 90 formed to protrude on the lower surface side of the armature 2 is formed in the center portion. By inserting and caulking into the hole 91 formed at the top from the upper side, the armature 2 is fixed to the center of the lower surface of the armature 2, and both ends thereof are protruded to both sides of the armature 2. In this state, a gap is formed between the spring pieces 19a on both sides of the central piece 19b and the lower surface of the armature 2 so that the spring pieces 19a can bend. The spring can be adjusted by protruding in the direction.
[0034]
At both ends of the central piece 19b protruding from both sides of the armature 2, square holes 42 into which the protrusions 43 protruding from the frame 27 are loosely fitted are provided.
[0035]
The frame 27 is formed by punching and bending a non-magnetic metal plate. As shown in FIG. 4A, the frame 27 is formed from the center of one end of the ceiling piece 27a in the short direction of the ceiling piece 27a. A side piece 27b that is bent downward and a side piece 27c that is bent downward from the opposite side end are provided, and is configured as described above in the space between the ceiling piece 27a and the side pieces 27b and 27c. The electromagnetic block 22 is housed, and the armature block 23 configured as described above is assembled below the electromagnetic block 22.
[0036]
The electromagnetic block 22 is attached to the frame 27 with four dowels 44 pressed upward on the upper surface of the yoke 29 from the lower surface and projecting upward into an insertion hole (not shown) formed corresponding to the ceiling piece 27a side. The upper surface of the yoke 29 is brought into contact with the lower surface of the ceiling piece 27a, and the dowel 44 protruding from the insertion hole in this state is caulked and fixed. At this time, the coil terminal 36 and the indicator terminal 37 protruding upward from both ends of the electromagnetic block 22 protrude upward from the outer ends of both ends of the ceiling piece 27a. Moreover, the upper end part of the iron core 31 of each exciting coil part 30 fits in the escape hole 47 provided so as to oppose the ceiling piece 27a.
[0037]
Further, projecting pieces 48 and 48 are formed at the center lower end of both side pieces 27b located slightly below the lower surface of the permanent magnet 32 of the electromagnetic block 22 by bending inwardly, and the armature 2 between the projecting pieces 48 and 48 is formed. Are inserted into the square holes 42 on both ends of the central piece 19b of the armature spring 19 projecting from both sides of the center of the armature 2 from above. Fit. At this time, since the armature block 23 is pulled upward by the magnetic force of the permanent magnet 32, the projection 43 is not dropped from the square hole 42, and the armature block 23 is held by the frame 27, and the quality is also stabilized.
[0038]
The drive mechanism block 1 is completed by incorporating the electromagnetic block 22 and the armature block 27 into the frame 27 as described above.
[0039]
Thus, the two sets of drive mechanism blocks 1 and 1 are symmetrically disposed above the corresponding pair of contact blocks 3a and 3b of the high frequency block. In this arrangement, protrusions 33 d that integrally project on the lower surfaces of the fixing bases 33 c on both sides of the exciting coil portion 30 are fitted into the recesses 4 c formed on the sub-base 4.
[0040]
The foot pieces 27d and 27d formed by bending outward at the lower ends of the side pieces 27b of the frame 27 to which the drive mechanism block 1 is assembled correspond to a pair of corners of the sub-base 4 as shown in FIG. The projecting portion 4a that can be formed in this manner is sandwiched, and the downward facing surfaces of the lower end step portions 27e and 27e are placed on the sub-base 4. Then, the foot piece 27d is fixed by welding to the side surface of the protruding portion 4a. Further, the downward surface of the stepped portion 27g formed at the lower end of the base of the protruding piece 27f formed inwardly bent at the lower ends of both sides of the one side piece 27c is placed on the upper surface of another pair of cut-off corner portions 4b of the sub-base 4 The piece 27f is cut off and arranged along the outer surface of the corner 4b. The projecting piece 27f is cut off and fixed to the side surface of the corner 4b by welding.
[0041]
With this arrangement and fixation, the upper ends of the drive bodies 16 of the contact blocks 3a and 3b are opposed to the lower surfaces of the spring pieces 19a and 19a of the opposing armature springs 19, for example, in the state shown in FIG. The permanent magnet 32, the yoke 29, and the iron core 31 of the exciting coil portion 30 form a closed magnetic path so as to oppose the spring piece 19a of the armature spring 19 on the left side of the armature 2 attracted to the iron core 31 side. The upper end of the drive body 16 of the contact block 3a moves upward, while the drive body 16 of the contact block 3b faces the spring piece 19a of the armature spring 19 on the other end side of the right armature 2 that is not attracted. The upper end resists upward bias of the contact spring 15 and is pushed downward by the armature 2 via the spring piece 19a.
[0042]
That is, the contact block 3a is urged upward by the contact spring 15 and the driving body 16 moves upward, so that both ends of the contact 5 are separated from the upper end surfaces of the center conductors 7 and 7 of the pair of coaxial connectors 6 and 6. The other contact block 3b is in a state in which the driving body 16 moves downward and both ends of the contact 5 are in contact with the upper end surface of the central conductor 7 of the coaxial connector 6, and corresponds to the contact block 3a. The pair of coaxial connectors 6 and 6 are off, and the coaxial connectors 6 and 6 corresponding to the contact block 3b are on.
[0043]
Now, after the drive mechanism block 1 is disposed and fixed on the high frequency block as described above, the substrate block 26 is disposed above the frame 27.
[0044]
In this case, the tip of the coil terminal 36 and the tip of the indicator terminal 37 projecting upward from the ceiling piece 27a of the frame 27 are placed below holes (not shown) provided so as to correspond to the printed board 24 of the board block 26, respectively. Are inserted and soldered to the printed circuit board 24, and the printed circuit board 24 is disposed and fixed above the ceiling piece 27a, and is electrically connected to a circuit mounted on the printed circuit board 24.
[0045]
As described above, the substrate block 26 includes the printed circuit board 24 and the plurality of terminal portions 25 on which the printed circuit board 24 is mounted. The terminal portion 25 includes the insulating base 250 including the base portion 250a and the protruding portion 250b. And a terminal fitting 251 inserted in 250, which inputs a drive signal (including excitation current) of the excitation coil section 30 from an external circuit, and an external operation state signal from the indicator terminals 37, 37. There is something to output to.
[0046]
Here, one indicator terminal 37 in one drive mechanism block 1 and one indicator terminal 37 in the back-to-back position of the other drive mechanism block 1 are used as a common output, and the other indicator in one drive mechanism block 1 is used. The terminal 37 is a normally closed terminal, and the other indicator terminal 37 in the other drive mechanism block 1 is a normally open terminal. The stationary contact pieces 38 and 38 of the indicator terminals 37 and 37 and the movable contact piece 40 of the indicator spring 39 are used. , 40 is used to switch on / off operation between the pair of coaxial connectors 6 and 6 by the contacts 5 of the contact blocks 3a and 3b by the armatures 2 and 2 corresponding to the drive mechanism blocks 1 and 1, respectively. The signal is taken out to the outside.
[0047]
Now, after the arrangement and fixing of the frame 27 is completed, a metal cover 9 is attached onto the base 8 as shown in FIG. 8 to complete the coaxial relay of this embodiment.
[0048]
When the cover 9 is attached, the insulation base 250 of each terminal portion 25 is inserted from the inside into the terminal lead-out hole 55 provided on the ceiling surface of the cover 9 to connect the terminal fitting 251 of the terminal portion 25 for external connection. The terminal 251a is protruded outside the cover 9. The lower end portion of the terminal fitting 25 constitutes a soldering terminal 251b to the printed circuit board 24.
[0049]
The cover 9 is attached such that its lower inner peripheral surface is along the outer peripheral surface of the base 8, and is finally fixed to the base 8 with screws 60 from the outside. In FIG. 8, 9a is a mounting piece, and 9b is a mounting screw insertion hole.
[0050]
Next, the operation of this embodiment assembled as described above will be briefly described.
[0051]
The state in which the end of the armature 2 of each drive mechanism block 1 is away from the opposing magnetic pole surface of the iron core 31, that is, the left end of the armature 2 in FIG. In FIG. 5, when each drive unit block 1 is viewed from the front, an excitation current in a direction to generate a magnetic flux in a direction of attracting the upper surface of the right end portion of the armature 2 is passed through the excitation coil 35 of the right excitation coil unit 30. Then, the right end portion of the armature 2 of each drive mechanism block 1 is attracted to the opposing magnetic pole surface of the iron core 31, and the armature 2 is rotated by the pushing force of the drive body 16 by the contact spring 15 on the contact block 3b side. Move.
[0052]
By this rotation, in each drive mechanism block 1, the right side of the armature 2 on the contact block 3 b side is attracted to the opposing magnetic pole surface of the iron core 31 of the right excitation coil unit 30 via the indicator spring 39. . Thereby, the closed magnetic path of the iron core 31, the yoke 29, the permanent magnet 32, the armature 2, and the iron core 31 is constituted. Therefore, this state is maintained because the magnetic flux of the permanent magnet 32 flows through the closed magnetic path even when the exciting current is lost.
[0053]
With the above operation, the contact 5 on the contact block 3a side corresponding to the armature 2 of each drive mechanism block 1 is separated from the upper end surfaces of the center conductors 7 and 7 of the corresponding pair of coaxial connectors 6 and 6, and The coaxial connectors 6 and 6 are turned off.
[0054]
On the contact block 3 b side corresponding to the armature 2 of each drive mechanism block 1, the right end portion of the armature 2 is pushed up by the contact spring 15 via the spring piece 19 a of the armature spring 19 by the rotation of the armature 2. Against this, the drive body 16 is pushed downward, and the contact 5 at the lower end of the drive body 16 comes into contact with the upper end surfaces of the center conductors 7 and 7 of the corresponding pair of coaxial connectors 6 and 6, and the coaxial connectors 6 and 6. Turn on between.
[0055]
As shown in FIG. 2A, the movable contact piece 40 of the independent spring 39 on the contact block 3a side that is in contact with the fixed contact piece 38 of one indicator terminal 37 of one drive mechanism block 1 is in fixed contact. The movable contact piece 40 of the independent spring 39 on the side of the contact block 3b that is in contact with the fixed contact piece 38 is released from the fixed contact piece 38.
[0056]
At the same time, the opposite side drive mechanism block 1 is excited so as to operate in the opposite direction, so that the independent spring 39 on the contact block 3b side that has been separated by the fixed contact piece 38 of the indicator terminal 37 of the drive mechanism block 1 is movable. The contact piece 40 comes into contact with the fixed contact piece 38, and the movable contact piece 40 of the independent spring 39 on the contact block 3 a side separated from the fixed contact piece 38 comes into contact with the fixed contact piece 38.
[0057]
Accordingly, an operation state signal corresponding to the operation of the drive mechanism blocks 1 and 1 is output to the outside. The operation state can be monitored by this operation state signal.
[0058]
If an excitation current in the direction of attracting the left end of the armature 2 is applied to the contact block 3b side, that is, the excitation coil 35 of the left excitation coil unit 30 in FIG. Thus, the state returns to the state of FIG.
[0059]
Although the above-described configuration is a bistable latching relay, a fail-safe monostable relay can be configured simply by changing the width dimension of the permanent magnet 32.
[0060]
That is, the width of the permanent magnet 32 corresponding to the longitudinal direction of the yoke 29 may be made smaller than the width of the hanging piece 29b so as to be close to one side.
[0061]
6B shows the positional relationship between the printed circuit board 24 and the base 8 of the high frequency block, and FIG. 7A shows the positions of the drive mechanism blocks 1, 1 and the base 4 and sub-base 8 of the high frequency block. FIG. 7 (b) shows the positional relationship between the electromagnetic block 22 and the base 4 and sub-base 8 of the high frequency block. FIGS. 6 and 7 are diagrams for illustrating the positional relationship. This is different from the actual top view as seen from above with the blocks assembled.
[0062]
【The invention's effect】
According to the present invention, each contact spring is constituted by a leaf spring having a planar shape in the shape of a plane, and the central portion of the central piece serves as a connecting portion for connecting the other end of the driving body, and Each central part of a pair of parallel side pieces is a fixing part that is fixed to the surface of the metal subbase with a fixing screw,
In addition, both side portions of the fixing portion of each side piece are inclined in a direction away from the surface of the metal subbase, and both side portions of the connecting portion of the center piece are inclined in the direction of the surface of the metal subbase. A pair of side pieces connected at both ends are formed so as to float above the surface of the metal sub-base,
The central piece is formed into the concave groove so that both end directions of the central piece are inclined by approximately 45 ° with respect to both end directions of the concave groove in which the contact corresponding to the driving body connected to the central piece is accommodated. Each contact on the surface of the metal sub-base with the mounting direction set so that the line connecting the fixed parts on both sides intersects perpendicularly to the line connecting the fixed parts on both sides of the adjacent contact spring. Since the spring is arranged, the contact spring of the conventional size and shape can be arranged with high space utilization efficiency, and as a result, the contact spring can be reduced in size to obtain sufficient spring characteristics to ensure space. There is no problem that enlargement is inevitable by eliminating or increasing the length of both ends of the groove to secure the arrangement space, and the entire switch is made smaller than before When bets can be, also placed in a metal sub-base surface, since the fixing point fastening by the fixing screw is only two places on the same straight line, there is an effect that the stress caused by tightening can be dispersed as compared with the prior art.
[Brief description of the drawings]
FIG. 1A is a top view showing a positional relationship between a base and a contact of a high-frequency block used in an embodiment of the present invention.
(B) It is sectional drawing of the high frequency block used for the same as the above.
(C) is a top view of the high-frequency block used in the above.
FIG. 2A is a front sectional view of the same.
(B) is a rear sectional view of the above.
FIG. 3 is a side view of a member composed of a contact and a driving body used in the above.
FIG. 4A is a front view of a drive mechanism block used in the above.
(B) is a side view of the drive mechanism block used in the above.
(C) is a bottom view of the drive mechanism block used in the above.
FIG. 5 is an exploded perspective view of the electromagnetic block and the armature block.
FIG. 6A is an explanatory diagram showing the positional relationship between the high frequency block and the frame.
(B) is explanatory drawing of the positional relationship of a high frequency block same as the above and a printed circuit board.
FIG. 7A is an explanatory view of the positional relationship between the high-frequency block and the drive mechanism block.
(B) is an explanatory view of the positional relationship between the high frequency block and the electromagnetic block.
FIG. 8 is an external front view of the above.
FIG. 9A is a top view showing a positional relationship between a base and a contact of a high-frequency block used in one embodiment of the present invention.
(B) It is sectional drawing of the high frequency block used for the same as the above.
(C) is a top view of the high-frequency block used in the above.
FIG. 10 is an explanatory diagram of a conventional example.
[Explanation of symbols]
4 Metal sub-base
5 Contact
5a end
6 Coaxial connector
7 Center conductor
8 Metal base
15 Contact spring
15a center piece
15b, 15c side piece
16 Driving body
17 Fixing screw
80 groove

Claims (1)

A metal base having four grooves formed on the surface so as to correspond to each side of the square;
It is attached from the back side of the metal base to each mounting hole penetrating the inside of the connecting part between the ends of the adjacent concave grooves and the back side of the metal base, and each central conductor protrudes into the connecting part. Four coaxial connectors,
Each recess extends so that both ends extend between the end surfaces of the pair of center conductors located at both ends of each recess groove, and both ends can be contacted and separated from the corresponding end surfaces of the center conductor. Four contacts movably housed in the groove,
A metal sub-base mounted so as to cover the opening of each concave groove on the surface of the metal base;
Four driving bodies having one end connected to the central portion of each contact and the other end penetrating through the surface side of the metal sub-base in an axially movable manner,
A contact spring disposed on the surface of the metal sub-base so as to correspond to each of the drive bodies, and biasing the corresponding drive body upward of the surface of the metal sub-base, and resists the bias of the contact spring. In the coaxial switch that pushes and drives the driving body to bring both ends of the corresponding contacts into contact with the tip surfaces of the corresponding central conductors,
Each of the contact springs is configured by a leaf spring having a planar shape in the shape of a plane, and a central portion of the central piece serves as a connecting portion for connecting the other end of the driving body, and a pair of sides parallel to the central piece. Each center portion of the piece is fixed to the surface of the metal subbase with a fixing screw, and both side portions of the fixing portion of each side piece are inclined in a direction away from the surface of the metal subbase, and the center piece The two side pieces of the connecting portion are inclined toward the surface of the metal sub-base, and another pair of side pieces to which both ends of the central piece are connected are floated from the surface of the metal sub-base,
The central piece is formed into the concave groove so that both end directions of the central piece are inclined by approximately 45 ° with respect to both end directions of the concave groove in which the contact corresponding to the driving body connected to the central piece is accommodated. Each contact on the surface of the metal sub-base with the mounting direction set so that the line connecting the fixed parts on both sides intersects perpendicularly to the line connecting the fixed parts on both sides of the adjacent contact spring. A coaxial switch comprising a spring.

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