JP4000715B2 - Coaxial relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coaxial relay.
[0002]
[Prior art]
As a coaxial relay used for switching between a microwave and a line, there is one disclosed in JP-A-58-202601.
[0003]
FIG. 9 shows a conventional example of a coaxial relay of the latching relay type. This conventional example is formed by die-casting or cutting as shown in the figure, and includes three mounting holes 103... Three SMA type coaxial connectors 101a to 101c are screwed into a female thread portion formed in the lower part, and the tips of the central conductors 102 of the coaxial connectors 101a to 101b are exposed on the upper surface as coaxial fixed contacts. A base 100, a metal sub-base 107 formed on the base 100 by die-casting or cutting, and a concave surface 108 on the upper surface of the base 100, and a central conductor 102 of a central coaxial connector 101b. A contact that contacts and separates both ends of the upper end surface and the upper end surface of the central conductor 102 of the coaxial connector 101a on one end (left end) side. A drive body 105 made of Teflon resin having a lower end heat-fitted at the center of 04 is inserted into the sub base 107 so as to be movable up and down, and a coil is formed between the upper end head of the drive body 105 and the upper surface of the sub base 107. A first contact block 109a that pushes up the driving body 105 with a spring 106 interposed therebetween, and an upper end surface of the central conductor 102 of the central coaxial connector 101b disposed in the concave plane 108 on the upper surface of the base 100 The Teflon resin driving body 105 whose lower end is heat-contacted to the contact 104 that contacts and separates the both ends of the center conductor 102 of the coaxial connector 101c on the other end (right end) side is movable up and down to the sub-base 107. And a coil spring 106 is interposed between the upper end head of the driving body 105 and the upper surface of the sub-base 107 to drive the driving body 10 upward. Constitute a high-frequency block in the second contact block 109b which is adapted to push up the.
[0004]
In addition, the upper ends of the iron cores 112 of the exciting coil portions 111 are inserted and fixed on both side portions of the flat yoke 110, and one magnetic pole surface is joined to the lower surface of the central portion of the yoke 110 between the exciting coil portions 111. The electromagnetic block 114 is composed of a rectangular parallelepiped permanent magnet 113 or the like that hangs down parallel to the exciting coil unit 111.
[0005]
This electromagnetic block 114 has spacers 115 interposed between both ends of the yoke 110 and both ends of the sub-base 107, respectively, and through holes 116 at both ends of the yoke 110, through holes of the spacer 115, The fixing screws 118 and 119 inserted through the insertion holes 117 at both ends of the sub-base 107 are screwed into the screw holes 120 opened at the upper surfaces of both ends of the base 100 and fixed and held.
[0006]
The armature 121 made of a magnetic body rotated by the magnetic action of the electromagnetic block 114 is pivotally supported by a projecting portion 122 projecting from the center of the sub-base 107 by a rotating shaft 121a. The upper surface of the part is opposed to the magnetic pole surface at the other end of the permanent magnet 113, and the upper surface of both ends is opposed to the magnetic pole surface at the lower end of the iron core 112 of the exciting coil unit 111.
[0007]
One fixing screw 118 is inserted into one end of the printed circuit board 123 disposed above the yoke 110 so as to hold the upper and lower surfaces of the printed circuit board 123 with nuts 125, 125, and further above the printed circuit board 123. The printed circuit board 124 is further inserted into one end of the printed circuit board 124 so that the upper and lower surfaces of the printed circuit board 124 are held between the nuts 126 and 126.
[0008]
On the upper surface of the printed circuit board 123, an indicator spring 127 whose center is fixed to the printed circuit board 123 and whose both ends are free ends and a fixed contact 131 facing the free end of the indicator spring 127 are disposed. The excitation circuit of the electromagnetic block 114 is wired and connected to a terminal 129 provided on the ceiling surface of the metal cover 128 attached on the base 100 by a lead wire 130 and connected to an external circuit. Yes.
[0009]
A pin 132 made of a non-magnetic and insulating material is inserted through the center of the iron core 112 of each exciting coil unit 111 so as to be movable up and down. The lower surface of the armature 121 is opposed to the lower surface on the free end side from the fixed point at the center of 127, and the lower end is opposed to the upper surface of the end of the armature 121.
[0010]
Thus, in the state shown in FIG. 9, the magnetic flux of the permanent magnet 1113 flows in the closed magnetic path of the permanent magnet 113, the yoke 110, the iron core 112, the armature 121, and the permanent magnet 113 in the left exciting coil unit 111, The left end is attracted and held on the magnetic pole surface of the iron core 112, and the pin 132 is pushed up at the left end of the armature 121, and the corresponding free end of the indicator spring 127 is separated from the fixed contact 131. In the contact block 109a, the drive body 105 is pushed upward by the coil spring 106, the corresponding contact 104 is separated from the upper end surface of the central conductor 102 of the coaxial connectors 101a and 101b, and the coaxial connectors 101a and 101b are turned off. Yes.
[0011]
On the other hand, in the figure, on the right side of the armature 121, the driving body 105 of the contact block 109b is pushed down on the lower surface of the right end portion of the armature 121 against the spring bias of the coil spring 106, and the center of the coaxial connectors 101b and 101c. A contact 104 corresponding to the upper end surface of the conductor 102 is in contact, and the coaxial connectors 101a and 101b are turned on. The pin 132 corresponding to the right end portion of the armature 121 moves downward, and the free end of the indicator spring 127 corresponding to the pin 132 is in contact with the fixed contact 131 by a spring force.
[0012]
In such a state, when an exciting current is passed through the right exciting coil portion 111 in the direction in which the right end portion of the armature 121 is attracted to the iron core 112 of the right exciting coil portion 111, the armature 121 is counterclockwise in the figure. By rotating in the direction, the state of the contact blocks 109a and 109b is reversed and the state of the indicator spring 127 is reversed. After the right end portion of the armature 121 is attracted to the magnetic pole surface of the iron core 112 of the right exciting coil portion 111, even if the exciting current is cut off, the permanent magnet 113, the yoke 110, the iron core 112, the armature 121, the permanent magnet The attracting state of the armature 121 is maintained by the closed magnetic path of the magnet 113.
[0013]
In this way, by reversing the armature 121 according to the direction of the exciting current flowing through the exciting coils of the exciting coil portions 111 and 111, the contact blocks 109a and 101b are connected between the coaxial connectors 101a and 101b. It can be turned on / off by the contacts 104, 104 of 109b.
[0014]
[Problems to be solved by the invention]
By the way, since the drive body 105 of the contact block 109a, 109b in the above-described conventional example is formed by cutting a Teflon material, there is a problem in that the component cost is high, and the contact 104 is fixed by heat deposition. There was a problem that the high frequency characteristics were unstable due to the subtle variation of the heat deposition site. In addition, there is a problem that force is constantly applied to the heat-bonded portion, the fixing becomes unstable due to opening and closing of the machine, and the high frequency characteristics become unstable. Moreover, since the cross-sectional shape of the part fixed to the contact 104 of the drive body 105 is circular, there also exists a problem that rotation cannot be prevented.
[0015]
Further, the spring bias of the driving body 105 is due to the coil spring 106 to be inserted, and therefore, the diameter is large so that the coil spring 106 does not come out, so that there is a problem that the friction due to contact with the armature 121 is large, In addition, since the shape of the driving body 105 is constant, it is necessary to make another driving body if the operating characteristics do not match.
[0016]
In order to secure further isolation characteristics, the coil spring 106 is used as a contact spring to press the contact 104 against the sub-base 107. However, the upward movement varies from side to side, and the operation is not stable. Although the diameter of the hole of the sub base 107 through which the driver 105 is inserted is reduced to prevent rattling, there is a problem that friction at this hole part increases and the operation becomes unstable. .
[0017]
Furthermore, there is a problem in that consumable powder is generated due to friction, resulting in poor contact and poor isolation.
[0018]
Furthermore, in order to obtain a large push-up force, a large displacement of the coil spring 106 is required, and there is a problem that workability at the time of incorporation is poor.
[0019]
The present invention has been made in view of the above problems, and the object of the invention of claim 1 is to stabilize the high-frequency characteristics and mechanical opening and closing, to reduce the cost of components, and to contact springs. The contact spring push-up direction is stable, the upward push-up force is also stable, direction control is not required , operation is stable, and operation characteristics can be adjusted. An object of the present invention is to provide a coaxial relay that can eliminate rattling .
[0020]
An object of the invention of claim 2 is to provide a coaxial relay capable of increasing the power that can be supplied to the contact in addition to the above object.
[0021]
An object of the invention of claim 3 is to provide a coaxial relay in which the driving body does not rotate in addition to the above object.
[0022]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a base in which a coaxial connector constituting a fixed contact is screwed from the bottom surface side by the upper end surface of the center conductor is rotated by the magnetic action of the electromagnetic block of the drive mechanism. A synthetic resin driving body that is opposed to the armature and is driven against the spring force by the rotation of the armature, and a through-hole that freely penetrates the driving body when moving in the vertical direction is mounted on the base. a sub-base plate of which is, is fixed by insert molding under end of the drive member to protrude the lower surface of the sub-base, the two coaxial fixed contacts that are juxtaposed when the drive member is driven press A contact that is released from both fixed contacts when the drive is released by pushing and the drive is returned by spring bias, and a contact spring that is fixed to the upper end of the drive and biases the drive Con Comprising a transfected block, the contact spring has been formed by punching and bending with a die, folded so as to position the central portion coupled to the upper end portion of the drive member at a position higher than its ends center A piece, and both ends of the central piece are symmetrically formed by bending so that the central portion is lower than both ends, and both ends are integrally connected to both ends of the central piece. The fixing screw that penetrates the center part of both end pieces is screwed and fastened to the screw hole on the base side through the insertion hole that forms in the sub base. It is characterized by comprising a plate spring having a symmetrical shape in which the position of the connecting portion of the central piece with the driving body is higher than that of the connecting portion .
[0023]
The invention of claim 2 is characterized in that, in the invention of claim 1 , the drive body is formed of a heat-resistant resin material.
[0024]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the cross-sectional shape of the contact hole for fixing the driving body is a square.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to an embodiment.
[0026]
This embodiment constitutes a latching relay. As shown in FIGS. 2 and 3, the drive mechanism block 1 in which the electromagnetic block 22 and the armature block 23 are incorporated in the frame 27 and the armature 2 of the armature block 23 are shown. SMA type coaxial connector 6a in which the metallic sub-base 4 provided with the contact blocks 3a and 3b driven by the contact block 3a and the fixed contacts opened and closed by the respective contacts 5 of the contact blocks 3a and 3b are formed on the upper end surface of the center conductor 7, respectively. A high frequency block composed of a metal base 8 screwed with ˜6b, an excitation circuit and an indicator circuit of the drive mechanism block 1, a substrate block 26 disposed above the drive mechanism block 1, and a box having a lower surface opening And a synthetic resin molded product cover 9 such as LCP.
[0027]
The metal base 8 is formed by cutting, and as shown in FIGS. 1 and 4, three attachment holes 10 penetrating from the bottom surface to the upper surface are formed at regular intervals in the longitudinal direction. 10 has a female screw portion 10a formed in the lower portion and an upper end opened to a concave plane 8a formed on the upper surface of the metal base 8. The female screw portion 10a of each mounting hole 10 is formed on the bottom surface side of the metal base 8. SMA type coaxial connectors 6a to 6c are respectively screwed, and the respective central conductors 7 of the coaxial connectors 6a to 6c are projected from the upper end opening of the hole 10 into the concave plane 8a. The upper end surfaces of these central conductors 7 are at the same height and constitute a fixed contact.
[0028]
The coaxial connectors 6a to 6c are made of a metal cylindrical outer shell conductor 11 having a male screw portion formed on the outer periphery, a fluorine resin insulator 12 inserted into the outer shell conductor 11, and the center of the insulator 12. A center conductor 7 inserted into the through hole and having a tip projecting outward, and a constricted portion 7a formed near the base of the projecting portion of the center conductor 7 are press-fitted into the center hole, and an upper end opening of the outer shell conductor 11 is inserted. And a sub-bushing 13 made of cyclic PCTFE (ethylene trifluoride) that is press-fitted into the portion, and the sub-bushing 13 ensures a holding force that restricts the removal and rotation of the center conductor 7 by the hardness of the material. .
[0029]
As shown in FIG. 5, the outer conductor 11 is provided with cut surfaces 11 a for securing an adhesive accommodating space opened at the upper end side of the outer conductor 11 at two positions on both sides of the male screw portion. The adhesive is used to secure the screwing strength with the female screw portion 10a when the male screw portion of the outer conductor 11 is screwed into the female screw portion 10a of the mounting hole 10, and the cut surface 11a is coated with an adhesive. When screwing, the amount of adhesive applied is increased to provide a space for storing excess adhesive when it is desired to secure strength with sufficient adhesive force.
[0030]
As shown in FIG. 1, the mounting hole 10 has a depth of the female screw portion 10 a that is approximately ½ (half) of the height of the base 8. The strength in the direction of the arrow Y can be maintained while securing a storage space for the adhesive by 11a.
[0031]
Further, by setting the inner diameter of the hole 10b above the female screw portion 10a to be slightly smaller than the inner diameter of the female screw portion 10a, a boundary portion between the upper end portion of the female screw portion 10a and the hole portion 10b is used as a step portion. The upper surface near the boundary portion between the outer shell conductor 11 and the sub bushing 13 of the coaxial connectors 6a to 6c is brought into contact with the downward surface, the diameter dimension of the sub bushing 13 at the contact portion, and the constricted portion of the central conductor 7 Balance of holding force while ensuring high frequency characteristics by making the dimensions in the diameter direction of the upper and lower surfaces of the sub bushing 13 abutting the upper and lower surfaces in the constricted portion 7a around the hole for fitting the 7a. Therefore, the strength in the direction of the arrow X is secured in the portions a and b of the respective portions, and the strength in the direction of the arrow X ′ is secured in the portion c, and at the same time, the center conductor 7 is prevented from rotating. Yes.
[0032]
By securing the strength in the X, X ′, and Y directions as described above, the holding force of the coaxial connectors 6a to 6c is ensured, and the components are displaced due to external force when the coaxial cable is connected and the high frequency characteristics are changed.・ It can prevent deterioration.
[0033]
The sub-base 4 is formed by punching a metal plate, and the lengths in the longitudinal direction and the short-side direction are slightly smaller than the dimensions in the corresponding direction of the base 8. When attached to a fixed position on the upper surface, the upper surface of the base 8 on which the lower end surface of the cover 9 is placed can be secured around it. Further, the lower surface of the sub-base 4 needs to ensure its flatness in order to contact the upper surface of the base 8, but since it is plate-shaped, lapping can be used for polishing.
[0034]
When the sub-base 4 is mounted at a fixed position on the base 8, it is intermediate between the central conductor 7 of the coaxial connector 6a and the central conductor 7 of the coaxial connector 6b and the central conductor 7 of the coaxial connector 6a and the coaxial connector 6b. Through holes 14 and 14 penetrating vertically are drilled at positions corresponding to the middle of the center conductor 7. These through-holes 14 and 14 are made of LPC (fully aromatic liquid crystal polymer) resin that is heat-bonded to contact springs 15 and 15 disposed on the upper surface side of the sub-base 4 and is always biased upward. The drive bodies 16, 16 are inserted freely when moving in the vertical direction.
[0035]
These drive bodies 16, 16 are joined and fixed at the lower ends of the sub-base 4 projecting to the lower surface side by means of insert (simultaneous) molding, and the center portions of the contacts 5, 5 made of flat plate-like conductors. In addition, contact blocks 3a and 3b are respectively configured. Each contact 5 of these contact blocks 3a and 3b is moved up and down in the concave plane 8a of the base 8 by moving the driving body 16 up and down, and the lower surface of both ends of the contact 5 of the contact block 3a is a concave plane. Opposite end faces of the central conductors 7 and 7 of the coaxial connectors 6a and 6b projecting into the 8a, and lower surfaces of both ends of the contact 5 of the contact block 3b are opposed to upper end faces of the coaxial connectors 6b and 6c projecting into the concave plane 8a. Then, the contact 5 of the contact block 3a contacts the upper end surfaces of the center conductors 7 and 7 of the coaxial connectors 6a and 6b when moving downward, and turns on between the coaxial connectors 6a and 6b. The contact 5 of the contact block 3b When moving downward, the upper ends of the central conductors 7 and 7 of the coaxial connectors 6b and 6c come into contact with the coaxial connectors 6b and 6b. In shall, both contact block 3a, the contact by the contact 5 of the 3b are alternately switched by the contacts 2 of the drive mechanism block 1. Accordingly, the central conductor 7 of the coaxial connector 6b serves as a common terminal, and the coaxial connector connected to the common terminal side is alternately switched between 6a and 6b.
[0036]
Here, since the LPC resin having particularly excellent heat resistance is used as the material of the driving body 16 of the contact blocks 3a and 3b, the heat generation of the contact 5 can be endured, and as a result, the power that can be supplied to the contact portion can be increased. . Further, since the contact 5 is coupled and fixed to the driving body 16 by insert molding, the contact of the contact 5 to the driving body 16 is stable, and the contact 5 is positioned by an insert molding die, so that the contact 5 is inclined. In addition, the dimensions (volume), position, and shape of the fixed part are stabilized by the mold accuracy, and the high-frequency characteristics including mechanical opening and closing are stabilized. Further, the driving body 16 can be manufactured at a low cost because of the molding process. Here, the cross-sectional shape of the hole of the contact 5 fixedly coupled to the drive body 16 is square as shown in FIG. 4 to prevent rotation. If the high-frequency matching is adjusted and changed by deforming the through hole 14, the high-frequency matching can be easily changed.
[0037]
The contact spring 15 that urges the drive body 16 of the contact blocks 3a and 3b is formed into a Japanese character shape by punching and bending with a mold, and the central portion of the central piece 15a is positioned higher than both ends thereof. The center piece 15a is bent so as to be positioned, and both end pieces 15b, 15b parallel to the center piece 15a are bent so that the center part is lower than both ends. The upper end portion 16a of the driving body 16 is inserted into the provided insertion hole 18 from below and fixed by heat-fitting, and the fixing screw 17 is inserted from above into an insertion hole (not shown) provided in the center of both end pieces 15b. It has become.
[0038]
When the upper end of the driving body 16 is heat-welded to the central piece 15a of the contact spring 15, the lower end surface of the jig 20 is inserted by inserting the small upper end portion 16a of the driving body 16 into the recess 20a of the jig 20 as shown in FIG. Is performed by heating and melting the upper end portion through the jig 20 so that the upper end portion of the drive body 16 hits the upper surface of the peripheral portion of the upper end portion, the height of the upper end portion 16a after the heat deposition is uniquely determined by the jig 20, Good accuracy. Further, since the upper end portion 16a of the driving body 16 is a portion that is pushed and driven by the armature spring 19 of the armature 2, the operating characteristics can be adjusted by changing the height of the upper end portion 16a. In the case of the embodiment, it is possible to easily adjust the height dimension of the upper end portion 16a with high accuracy simply by using the jig 20 having different height dimensions of the recess 20a, and to easily adjust the operation characteristics. There is. In addition, since the purpose of heat contact is to ensure the return force of the contact spring 15, close contact and fixing are not necessary.
[0039]
Here, the diameter of the driving body 16 below the upper end portion 16a that serves as a presser for the contact spring 15 only needs to be larger than the inner diameter of the insertion hole 18 of the contact spring 15, so that a heat-sealed shape with a small diameter is possible. Further, the tip of the upper end portion 16a can reduce the friction of the portion in contact with the armature spring 19, reduce the contact area as shown, or form an R surface. Further, the volume of the heat-attached portion can be adjusted by the height of the upper end portion 16a of the driving body 16, and since the precision of the molding die of the driving body 16 is good, rattling can be eliminated.
[0040]
On the other hand, the contact spring 15 is screwed and fastened to the screw hole 21 on the base 8 side through an insertion hole for forming the fixing screw 17 penetrating the center portion of the both end pieces 15b in the sub base 4 together with the sub base 4. The fixing screw 17 is also used as a fixing screw for the sub base 4 to improve workability.
[0041]
Now, since the contact spring 15 has a bilaterally symmetrical shape formed in a Japanese shape and is configured to fix the central part of both end pieces 15b, 15b, the upper displacement of the central piece 15a is possible, but to both sides There is almost no blurring, and the pushing force is determined by the die size of the punching / bending process, so that the pushing force is stable. As a result, the pushing direction is stabilized and stable operation can be realized. In addition, since one part has a simple shape, the part productivity is good.
[0042]
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 with the inner surface of the hole 14, the friction at this portion can be eliminated, and the resulting operation becomes more stable. Further, by adopting a method in which the contact spring 15 is fixed to the sub-base 4 by screws, replacement for adjusting characteristics is facilitated.
[0043]
The contact spring 15 may be a rhombus whose outer shape is symmetrical as shown in FIGS. 7A and 7B, or may be circular. In these cases, the central portion of the center piece 15a is The central piece 15a is bent so as to be above the height position of both ends, and the piece is bent so that the screw fixing portion is below the height position of both ends of the piece provided with the screw fixing portion.
[0044]
Here, as shown in FIG. 1, the dimension α of the lower end of the driving body 16 projecting downward from the lower surface of the contact 5 of the contact blocks 3a and 3b is fixed depending on the precision of the molding die. On the other hand, the deviation in impedance at the center of the contact blocks 3a and 3b is optimally determined by the depth dimension β of the circular recess 28 provided in the concave plane 8a of the base 4 provided as a relief when the driving body 16 moves downward. Can be realized. Also, as shown in FIG. 4, the impedance matching is most easily achieved by making the central portions of the contact blocks 3a and 3b and the cross-sectional shape of the recess 28 concentric. In FIG. 4, γ represents the diameter of the recess 28, and γ ′ represents the diameter of the central portion of the contact blocks 3a and 3b.
[0045]
The drive mechanism block 1 includes an electromagnetic block 22, an armature block 23 including an armature 2 and an armature spring 19, and a frame 27 that holds the electromagnetic block 22 and the armature block 23.
[0046]
The electromagnetic block 22, which is a main component of the drive mechanism block 1, is composed of a yoke 29, two sets of exciting coil sections 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 a central portion in the longitudinal direction of the flat plate portion 29a. The upper end of the iron core 31 of the exciting coil portion 30 is inserted into holes provided at both end positions symmetrical from the longitudinal center of the flat plate portion 29a, and fixed by caulking, and the exciting coil portion 30 is suspended. A permanent magnet 32 is bridged between the lower ends of the hanging pieces 29b and 29b.
[0047]
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.
[0048]
Here, the center of the drooping piece 29b coincides with the center of the flat plate portion 29a, and the distance from the center to the both side edges is equal to each other. In this embodiment constituting the latching relay, the permanent magnet 32 is shown in FIG. As shown in FIG. 3, the hanging piece 29b has a width extending over both side edges and has magnetic poles on the upper and lower surfaces.
[0049]
By adopting the above-described structure for attaching the permanent magnet 32, the volume of the permanent magnet 32 becomes smaller and the cost is lower than the case where the upper end of the permanent magnet is bonded and fixed to the plate-shaped yoke and the permanent magnet is suspended. It will be cheap. Further, when the permanent magnet is directly bonded to the central portion of the yoke, it is difficult to position the center, and when the permanent magnet is tilted, the displacement at the magnetic pole at the tip of the permanent magnet is large, which affects the operating characteristics. As described above, when the permanent magnet 32 is attached between the hanging pieces 29 b and 29 b of the yoke 29, the inclination of the permanent magnet 32 is determined by the processing accuracy of the yoke 29. That is, since the inclination of the yoke 29 is determined by a die for punching and bending, the inclination is small and the dimensional accuracy is stable, so that the stroke of the armature 2 described later is stabilized, and power consumption can be reduced. In addition, since the magnetic circuit is configured with the yoke 2 having a small magnetic resistance as the center, a magnetic circuit capable of securing an equal or higher magnetic force even when the permanent magnet 32 having a large magnetic resistance is small can be configured.
[0050]
The exciting coil unit 30 is configured by winding an exciting coil 35 around a coil bobbin 33 having an iron core 31 inserted therethrough, and a pair of connecting portions connected to both ends of the exciting coil 35 from a flange 33a on the coil bobbin 33 of each exciting coil unit 30. 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. A fixing base 33c for fixing the lower portion of the pair of indicator terminals 37, 37 is provided at the outer end of the lower flange 33b, and the indicator terminals 37, 37 are supported. These indicator terminals 37, 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, 36 of the upper flange 36a. The upper end protrudes upward from the flat plate portion 39a of the yoke 39 in a retained form. The pair of indicator terminals 37, 37 are bent and protruded at both lower ends to form fixed contact pieces 38, 38. The pair of indicator terminals 37, 37 are indicators attached to the upper surfaces of both ends of the pair of fixed contact pieces 38, 38 and the contact 2, respectively. When the movable contact pieces 40, 40 on both sides of the Kate spring 39 are contact-separated by the rotation of the armature 2, the coaxial connector 6a by the contact 5 of the corresponding contact block 3a or 3b is turned on and off. A signal indicating the on / off state between 6b or 6c and 6b can be taken out.
[0051]
Therefore, in the structure of this embodiment, the indicator contact is arranged above the electromagnetic block as in the prior art, and a pin that moves up and down by the rotation of the armature is placed in the central through hole of the iron core of the exciting coil. Unlike the structure that opens and closes the indicator contact at the upper end, there is no need to increase the relay height, and there is no need for a printed circuit board or pin for mounting the indicator part, and between the pin and the center through hole of the core. This eliminates friction that occurs, and stabilizes operation.
[0052]
Here, the indicator terminal 37 and the indicator spring 39 are simultaneously removed from the same material (non-magnetic conductive material) with the same thickness by punching, thereby improving the productivity as well as making the mold common. I am trying.
[0053]
Each 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 recovery plate. . The movable contact piece 40 is gold-plated or inlaid in a tape shape.
[0054]
The contact block 23 is composed of an armature 2 made of a magnetic material, indicator springs 39 and 39 also serving as a rejuvenating plate fixed to the upper surface of both ends of the armature 2 by welding, and a contact spring 19 attached to the lower surface. A pair of contact springs 19 are formed integrally with a central piece 19b formed in a direction orthogonal to the longitudinal direction of the armature 2 and parallel to the longitudinal direction of the armature 2 from both sides of the center piece 19b. The spring piece 19a and a spring adjusting protrusion 41 integrally protruding sideways from both ends of the spring pieces 19a. The central piece 19b is formed in a substantially U-shaped cross section so as to protrude upward. The dowel (not shown) protruding from the lower surface side of the armature 2 is inserted into the hole (not shown) formed in the central portion from above and caulked to be fixed to the center of the lower surface of the armature 2. , Both ends of the armature And it is projected to 2 on both sides. 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. Square holes 42 into which ribs 43 protruded from a frame 27 described later are loosely fitted are provided at both ends of the central piece 19b protruding from both sides of the armature 2.
[0055]
The frame 27 is formed by punching and bending a non-magnetic metal plate, and includes a ceiling piece 27a and side pieces 27b formed by bending downward from both lateral ends of the ceiling piece 27a. 27b, and the electromagnetic block 22 configured as described above is accommodated in the space between the ceiling piece 27a and the side pieces 27b and 27b, and the armature configured as described above is further provided below the electromagnetic block 22. Block 23 is arranged.
[0056]
The electromagnetic block 22 is attached to the frame 27 by inserting the dowels 44 pressed from the lower surface into the four corners of the upper surface of the yoke 39 and projecting upward into the insertion holes 45 formed corresponding to the ceiling piece 27a side from below. Then, the upper surface of the yoke 39 is brought into contact with the lower surface of the ceiling piece 27a, and the dowel 44 protruding from the insertion hole 45 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 above the ceiling piece 27a from the notches 46 formed at both ends of the ceiling piece 27a. Moreover, the upper end part of the iron core 31 of each exciting coil part 30 will be fitted in the escape hole 47 provided so as to oppose the ceiling piece 27a.
[0057]
Bending pieces 48 and 48 are formed by bending inwardly at the central lower ends of both side pieces 27b and 27b located slightly below the lower surface of the permanent magnet 32 of the electromagnetic block 22, and an armature is provided between the protruding pieces 48 and 48. 2 and the ribs 43 formed by bending downward from the tips of the projecting pieces 48, 48 are projected from above into the square holes 42 at both ends of the center piece 19 b of the contact spring 19 projecting from both sides of the center of the armature 2. By loosely fitting, the upper surface of both ends of the central piece 19b of the contact spring 19 protruding from both sides of the armature 2 is swingably contacted with a dowel 49 protruding from the lower surface of the protruding pieces 48, 48. At this time, since the armature block 23 is pulled upward by the magnetic force of the permanent magnet 32, the arm 43 is held by the frame 27 without dropping the rib 43 from the square hole 42, and the quality is also stabilized.
[0058]
By adopting such a holding structure for the armature block 23, welding and caulking jigs are not required and manual assembly is possible, thereby improving productivity. Further, since the rib 43 is installed on the central side of the armature 2, there is almost no sliding due to the rotation of the armature 2, that is, there is no mistake and the operation is stable. Further, since the rib 43 is loosely fitted in the square hole 42 of the contact spring 19, the spring force of the contact spring 19 does not act on that portion, and the dowel 49 and the lower surface of the center piece 19 b of the contact spring 19 Therefore, there is almost no error between the two, and an excessive spring force does not work and the operation is stabilized as compared with welding fixing.
[0059]
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.
[0060]
The drive mechanism block 1 is arranged and fixed on the high frequency block as follows. In other words, the stepped portions 53a of the leg pieces 53 integrally projecting downward from the lower portions of both ends 27b of the frame 27 are fitted into the recessed portions 54 formed at the four corners of the sub-base 4, and the downwardly facing surfaces of the stepped portions 53a. Is placed on the upper surface of the sub-base 4 to determine the height, and the lower end side surface 53a of the leg piece 53 is welded and fixed to the side surface of the sub-base 4 in this state.
[0061]
By this arrangement and fixing, 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, as shown in the figure, a permanent magnet 32, a yoke 29, The drive body 16 of the contact block 3a facing the spring piece 19a of the contactor spring 19 on one end side of the contactor 2 that forms a closed magnetic path with the iron core 31 of the exciting coil unit 30 and is attracted to the iron core 31 side. The upper end is separated from the spring piece 19a, and the upper end of the drive body 16 of the contact block 3b facing the spring piece 19a of the contact spring 19 on the other end side of the contact 2 on the other side is not upward. The armature is pushed downward by the armature 2 through the spring piece 19a against the urging. 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 central conductors 7 of the coaxial connectors 6a and 6b. In the other contact block 3b, the driving body 16 moves downward, and both ends of the contact 5 are in contact with the upper end surfaces of the central conductors 7 and 7 of the coaxial connectors 6b and 6c, and between the coaxial connectors 6a and 6b. Is off and the coaxial connectors 6b and 6c are on.
[0062]
Here, since the electromagnetic block 22 and the armature block 23 of this embodiment are all positioned by one part of the frame 27, the dimensional accuracy is stabilized and the productivity is improved.
[0063]
In addition, since the fixing to the frame 27 is all without screws and is performed by caulking or welding, the dimensional accuracy in the height direction is stable, no recombination due to variations in accuracy is required, and no adhesive application to the screw portion is required. Workability is improved.
[0064]
In addition, the frame 27 is stable in size and bending due to the mold accuracy, and the frame 27 is welded to the sub-base 4 of the high-frequency block together with the dimensional stability of the electromagnetic block 22, so that the height dimension is determined by one part of the frame 27. Can do. Further, since the drive mechanism block 1 is stacked on the high frequency block, the assembly process is simplified.
[0065]
Further, coaxial connectors 6a to 6c for opening and closing high frequency are attached, and the high frequency block including the base 8 and the sub base 4 to which the contact blocks 3a and 3b are attached and the drive mechanism block 1 are separated into blocks. Since the structure is incorporated, the high-frequency characteristics can be adjusted only by the high-frequency block, and the operating characteristics on the drive mechanism block 1 side can be adjusted separately from the high-frequency block side, so that the adjustment work is easy and productivity can be improved. Further, since the stroke of the armature 2 is determined by the position of the frame 27 and the iron core 31, it can be adjusted by adjusting the dimensions with a jig for ironing the iron core. Furthermore, the pushing amount of the contact blocks 3a, 3b, that is, the overtravel amount after the contact 5 abuts the upper surface of the central conductor 7 of the coaxial connectors 6a, 6b or 6b, 6c is the bending of the armature spring 19 after assembly. The adjustment is performed by using the spring adjustment protrusion 41. In this case, since the tip of the spring piece 19a of the armature spring 19 can be brought into contact with the lower surface of the armature 2, the adjustable width is wide.
[0066]
Furthermore, the adjustment of the operating characteristics when a predetermined excitation voltage is applied to the excitation coil section 30 is finally adjusted by bending the fixed contact piece 38 of the indicator terminal 27 that contacts the movable contact piece 40 of the indicator spring 39. . The spring adjusting protrusion 41 and the fixed contact piece 38 are formed so that other parts such as the frame 27 do not get in the way during adjustment.
[0067]
In the case of the present embodiment, basically, since the dimensional accuracy of each component and its positioning is improved, almost no adjustment can be realized.
[0068]
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.
[0069]
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 attached to the mounting holes 50 and 51 provided so as to correspond to the printed board 24 of the board block 26 from below. The printed board 24 is inserted and soldered, and the printed board 24 is disposed and fixed above the ceiling piece 27 a and is electrically connected to a circuit mounted on the printed board 24.
[0070]
The board block 26 includes a printed board 24 and a connector 25 mounted on the center of the printed board 24. The connector 25 is a terminal for inputting a driving signal (including exciting current) of each exciting coil section 30 from an external circuit. And a terminal for outputting an operation state signal from the indicator terminal 37 to the outside. Of course, in the case of TTL driving, a TTL circuit or the like is mounted on the printed circuit board 24. The central opening 52 of the ceiling piece 27 a is an opening for escaping the terminal on the lower surface side of the connector 25.
[0071]
After the arrangement and fixing of the frame 27 is finished, the cover 9 is attached on the base 8 to complete the coaxial relay of this embodiment.
[0072]
When the cover 9 is attached, the terminal of the connector 25 is inserted into the terminal lead-out hole 55 provided on the ceiling surface of the cover 9 from the inside, and the drive mechanism block 1 is housed in the cover 9 while the cover 9 is attached to the base 8. The lower end of the cover 9 is moved in the direction, using the elasticity of the cover material, and the locking projections 56 projecting and locking to the outer surface of the fixed base 33c of the coil bobbin 33 of the exciting coil portions 30 and 30. The locking projection 56 is moved over while being guided by the tapered surface 56a at the upper end, and the locking projection 56 is locked from the inside to the locking holes 57 formed in the lower portions of both side walls of the cover 9 to fix the cover 9 To do. At this time, the lower end portion of the cover 9 comes into contact with the upper surface of the base 8 around the sub-base 4.
[0073]
As described above, according to the present embodiment, the entire assembly process is simplified by arranging the drive mechanism block 1 on the high frequency block, stacking the substrate block 26, and attaching the cover 9 from above. Assembling improves.
[0074]
Next, the operation of the present embodiment assembled as described above will be briefly described.
[0075]
In FIG. 2, the magnetic flux in the direction in which the upper end of the right end portion of the armature 2 is attracted to the exciting coil 35 of the exciting coil portion 30 on the side where the end portion of the armature 2 is away from the opposing magnetic pole surface of the iron core 31. When an excitation current in the direction to be generated is passed, the right end portion of the armature 2 is attracted to the opposing magnetic pole face of the iron core 31, and the contact force in the contact block 3b side pushes up the driving body 16 with a contact force in FIG. The pole 2 rotates counterclockwise.
[0076]
By this rotation, the right end portion of the armature 2 on the contact block 3b side is attracted to the opposing magnetic pole surface of the iron core 31 of the right exciting coil portion 30 via the indicator spring 39, and the iron core 31, the yoke 29, and the permanent A closed magnetic path of the magnet 32, the armature 2, and the iron core 31 is configured, and the right end portion of the contact 2 is attracted to the magnetic pole surface of the iron core 31 of the right excitation coil portion 30. This state is maintained because the magnetic flux of the permanent magnet 32 flows through the closed magnetic circuit even when the excitation current is lost. With the above operation, the contact 5 on the contact block 3b side is separated from the upper end surfaces of the central conductors 7 and 7 of the coaxial connectors 6b and 6c, and the coaxial connectors 6b and 6c are turned off. On the other hand, on the contact block 3a side, the left end of the armature 2 is moved downwardly against the pushing force of the contact spring 15 via the spring piece 19a of the armature spring 19 by the counterclockwise rotation of the armature 2. The contact 5 at the lower end of the driving body 16 contacts the upper end surfaces of the center conductors 7 and 7 of the coaxial connectors 6a and 6b, and turns on between the coaxial connectors 6a and 6b. Further, the movable contact piece 40 of the individual spring 39 on the side of the contact block 3b that has been in contact with the fixed contact piece 38 of the indicator terminal 37 is separated, and the contact that has been separated from the fixed contact piece 38 of the indicator terminal 37 is separated. The movable contact piece 40 of the independent spring 39 on the block 3 a side comes into contact with the fixed contact piece 38, and an operation state signal is output to the outside through the connector 25. The operation state can be monitored by this operation state signal.
[0077]
If an excitation current in the direction of attracting the left end portion of the armature 2 is supplied to the contact block 3a side, that is, the excitation coil 35 of the left excitation coil portion 30 in the figure from this inversion state, the inversion operation is performed in the same manner as described above. It will return to the state of.
[0078]
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.
[0079]
That is, as shown in FIG. 7, 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 and arranged so as to approach one side. In this case, the excitation coils 35 of the left and right excitation coil sections 30 are connected in series to constitute one excitation coil.
[0080]
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.
[0081]
That is, as shown in FIG. 8, 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. In this case, the excitation coils 35 of the left and right excitation coil sections 30 are connected in series to constitute one excitation coil.
[0082]
【The invention's effect】
According to the first aspect of the present invention, there is provided a base that is screwed with a coaxial connector constituting a fixed contact at the upper end surface of the center conductor from the bottom side, and an armature that is rotated by the magnetic action of the electromagnetic block of the drive mechanism. A synthetic resin driving body that is pushed and driven against the spring bias by rotation of the plate, and a plate-like sub-base that is attached to the base by drilling a through hole that freely penetrates the driving body when moving in the vertical direction; It is fixed by insert molding under end of the drive member to protrude the sub-base of the lower surface, in contact with two coaxial fixed contacts that are juxtaposed when the drive member is driven press, press the drive is released A contact block that includes a contact that is separated from both fixed contacts when the driving body returns by spring biasing, and a contact spring that is fixed to the upper end of the driving body and biases the driving body. Above Tact spring has been formed by punching and bending with a die, a central piece bent so as to position the central portion coupled to the upper end portion of the drive member at a position higher than its ends, the central piece Both ends of the center piece are bent symmetrically so that the center portion is lower than both ends, and both end portions thereof are integrally connected to both end portions of the center piece. By screwing and fastening to the screw hole on the base side through the insertion hole for forming the fixing screw penetrated in the sub base, the fixing portion is fixed to the base together with the sub base , and the connecting portion is made higher than the fixing position. Since the position of the coupling portion of the central piece with the driving body is configured by a left and right symmetrical leaf spring that is higher than the connecting portion, the contact between the driving body and the contact is stabilized by insert molding, and Since the position of the contact is determined by the mold, the size, position, shape, etc. of the binding site are stable, and the volume of the binding site is also constant in the mold, so the high frequency characteristics are stable, and the binding site is stable and the volume is increased. Therefore, mechanical opening and closing is stable, and further, there is an effect that the cost of parts is reduced because it does not depend on cutting. In addition, because the contact spring can be manufactured by punching and bending a metal plate, the parts productivity is good, and because it is shaped as described above, it can be displaced upward, but there is almost no blurring on both sides. The push-up force of the center piece is stable and the push-up force can be determined by the size of the mold to be processed, so the push-up force upward is also stable. As a result, there is no need to restrict the direction of the hole in the mounting part through which the driver is inserted Therefore, the gap between the drive body and the hole can be increased, and there is an effect that the friction is eliminated in this portion and the operation is stabilized, and in addition, since the shape is simple with one part, the part productivity is also improved. The effect is good .
[0083]
According to a second aspect of the present invention, in the first aspect of the invention, since the driving body is formed of a heat-resistant resin material, it is possible to withstand the heat generation of the contact, and as a result, the power that can be supplied to the contact can be increased. There is.
[0084]
According to the invention of claim 3, in the invention of claim 1 or 2 , since the cross-sectional shape of the contact hole for fixing the driving body is square, there is an effect that rotation of the driving body can be prevented.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a high-frequency block according to an embodiment of the present invention.
FIG. 2 is a reduced exploded perspective view of the above.
FIG. 3 (a) is a partially broken front view of the above.
(B) is a side view in which the above is partially broken.
FIG. 4 is an enlarged top view in which the base of the above is partially broken away.
FIG. 5 is an explanatory diagram of heat contact between the driver and the contact spring.
FIG. 6 is a front view of a yoke used in the above.
FIG. 7A is a top view of another example of the contact spring of the above.
(B) is a top view of another example of the contact spring of the above.
FIG. 8 is a front view of a yoke used in the embodiment constituting the monostable relay of the present invention.
FIG. 9 is a partially cutaway front view of a conventional example.
[Explanation of symbols]
3a, 3b Contact block 5 Contacts 6a to 6c Coaxial connector 7 Center conductor 16 Driver 15 Contact spring 15a Center piece

Claims (3)

The base is screwed from the bottom side with a coaxial connector that forms a fixed contact at the top end of the center conductor, and the armature is rotated by the magnetic action of the electromagnetic block of the drive mechanism. A plastic drive body that is pushed against the surface, a plate-shaped sub-base that can be mounted on the base by drilling a through-hole that freely passes through the drive body in the vertical direction, and protrudes from the lower surface of the sub-base to be secured by insert molding under end of the drive member, in contact with two coaxial fixed contacts that are juxtaposed when the drive member is driven press, the driving member by spring-loaded push drive is released Comprising a contact block composed of a contact that is separated from both fixed contacts when the return movement moves, and a contact spring that is fixed to the upper end of the drive body and biases the drive body.
The contact spring is formed by punching and bending using a mold , and a central piece that is bent so that a central portion where the upper end portions of the driving body are coupled is positioned higher than both ends thereof, and the central portion It is symmetrically formed on both sides of the piece so that its central part is lower than both ends, and both ends thereof are integrally connected to both ends of the central piece. Fixing the base screw together with the sub-base by screwing and fastening it to the screw hole on the base side through the insertion hole for forming the fixing screw through the sub-base, and making the connecting portion higher than the fixing position, A coaxial relay, characterized in that the center piece is constituted by a left and right symmetrical leaf spring in which a position of a coupling portion with the driving body is higher than that of the coupling portion. 2. The coaxial relay according to claim 1, wherein the driving body is formed of a heat resistant resin material . 3. The coaxial relay according to claim 1, wherein a cross-sectional shape of a contact hole for fixing the driving body is a square shape .

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