JP4016551B2 - High frequency relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high frequency relay.
[0002]
[Prior art]
As a conventional high frequency relay, there is a structure shown in FIG.
[0003]
In this conventional example, a base 100 on which a relay mechanism is disposed, a case 101 attached to the base 100, an electromagnetic block 105 including a yoke 102, a coil 103, and an iron core 104, a card block 106, a shield, It is composed of a box 107, movable contact springs 108, 108 provided on the card block 106 side, fixed contact terminals 109a to 109d, and the like. The shield box 107 is bent and punched from a single metal plate. The box portion and the ground terminals 110 are integrally formed. Reference numeral 111 denotes a balance spring.
[0004]
In the card block 106 of this conventional example, a pair of armatures 114, 114 each having a permanent magnet 113 interposed in a through hole provided at one end in the longitudinal direction of a substantially rectangular parallelepiped card 112 is disposed. Is positioned between one magnetic pole surface of the iron core 104 of the electromagnet block 105 and the tip of one end of the yoke 102, and the other magnetic pole surface of the iron core 104 of the other contact 114 and the other end of the yoke 102. It is the structure mounted on the electromagnetic block 105 so that it may be located between the front-end | tip parts on the side.
[0005]
[Problems to be solved by the invention]
By the way, in the above-described conventional example, when manufacturing the specifications for 75Ω and 50Ω for the frequency band of the signal current to be opened and closed, in order to set the characteristic impedance of the transmission line correspondingly, the transmission Since the shapes of the shield box 107, the movable contact spring plate 108, and the fixed contact terminals 109a to 109b related to the characteristic impedance of the road are made to correspond to the characteristic impedance, these parts cannot be shared with the specifications of 50Ω and 75Ω.
[0006]
The present invention has been made in view of the above points, and the object of the present invention is to correspond to the setting change of the characteristic impedance only by the shape of one component among the components related to the characteristic impedance of the transmission line, An object of the present invention is to provide a high-frequency relay in which other components can be shared by different impedance specifications.
[0007]
In addition, an object of the present invention is to provide a high-frequency relay that can be easily adjusted after assembling components.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, a shield space in which the ground contact portion electrically connected to the ground terminal and the fixed contact portion of the fixed contact terminal are disposed is provided on the base, and the shield space contacts the fixed contact portion. A movable contact spring plate is disposed so as to contact the ground contact portion when it is separable and separated from the fixed contact portion, and a spring support portion is provided that supports the movable contact spring plate by insert molding. in the high frequency relay which is disposed an electromagnet block to drive the card base outside shielded space, turned so that by matching the Mino shape change of the variable dynamic contact spring plate characteristic impedance of the entire transmission path with respect to the impedance of the specification The movable contact spring plate corresponding to the 75Ω specification has a protrusion protruding at the upper edge of the portion inserted into the card spring support, The movable contact spring plate corresponding to the 50Ω specification is formed in the upper edge of the portion inserted into the spring support portion of the card in place of the above protrusion, and the portion constituting the movable contact The length of the groove for dividing into two is longer than that of the movable contact spring plate corresponding to the 75Ω specification .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to basic embodiments and embodiments.
[0013]
(Embodiment 1)
In this embodiment, as shown in FIGS. 2 and 3, a base 1 made of a synthetic resin molding material, a relay mechanism portion disposed on the base 1, and a box made of a synthetic resin molding agent that adheres to the base 1. It is comprised with the shape case 2.
[0014]
The electromagnet block 5 which is a main configuration of the relay mechanism section includes a coil bobbin 7 around which an exciting coil 6 is wound, an iron core 8 inserted through a central through hole of the coil bobbin 7, and an iron core 8 viewed on one end side of the coil bobbin 7. One end is caulked and fixed to the tip plate surface, and the yoke 9 is formed by bending the tip of the bent piece parallel to the coil bobbin 7 and extending the tip of the bent piece to the other end side of the coil bobbin 7.
[0015]
The electromagnet block 5 is arranged on the base 1 so that the lower portions of the coil terminals 10 and 10 provided on the coil bobbin 7 protrude toward the lower surface side of the base 1 from the insertion holes 11 provided in the base 1 as shown in FIG. .
[0016]
The armature 12 that is attracted and driven when the electromagnet block 5 is excited is formed of an iron piece bent in an L shape, and one piece 12a is opposed to the other end of the iron core 8 exposed on the other end side of the coil bobbin 7 and its bent portion. Is arranged so as to be able to turn freely on the tip of the bent piece of the yoke 9. Further, the tip of the other piece 12b is brought into contact with the side surface of the card 4 to be described later.
[0017]
The hinge spring 3 is disposed by press-fitting the lower portion into a press-fit groove 14 formed in the lower portion 13 of the side wall 25 provided at one end portion on the base 1 on the side where the armature 12 is disposed, and obliquely intersects from the upper side of one side end. In addition, the outer corner of the bent portion of the armature 12 is pressed by the tip portion of the presser piece 3a formed to extend, and the inner corner of the armature 12 is pressed against the yoke 9 and held.
[0018]
On one side of the base 1 parallel to the location of the electromagnet block 5, the partition 15 is separated from the location of the electromagnet block 5 by the partition 15, and is surrounded by the side wall 36 on one side of the partition 15 and the base 1 and the side walls 25 on both ends. The space above the base 1 is used as an arrangement site for the shield part including the contact part.
[0019]
This shield part is composed of two shield plates 16A and 16B arranged in parallel, and is shown on the base 1 as shown in FIG. 4 (a) along the inner side surface of the side wall 15 at both ends of the shield part placement site. The opposite surfaces of both end portions of the shield plates 16A and 16B are disposed on both side surfaces of the ribs 17 formed as described above.
[0020]
The ribs 17 are used for positioning the shield plates 16A and 16B of the base 1, and the positions of the shield plates 16A and 16B are determined by the molding accuracy of the ribs 17, and on the opposite surface side of the shield plates 16A and 16B. Is not affected by variations in the thickness of the shield plates 16A and 16B, so that the distance between the plate surfaces inside the shield plates 16A and 16B can be set with high accuracy.
[0021]
As shown in FIG. 4A, a position corresponding to the center position of the shield plates 16A and 16B and a position in the vicinity of the ribs 17 are respectively provided on the center line that bisects the space between the shield plates 16A and 16B. The fixed contact terminals 19a, 19b and 19c are respectively penetrated through the holes 18 so that the fixed contacts 20 of the respective fixed contact terminals 19a to 19c face the space surrounded by the shield plates 16A and 16B. .
[0022]
Here, at the upper end of each side wall 25 of the base 1 on both ends of the shield part, the pivot 4 is provided on both ends of the card 4 driven by the armature 12 to support the card 4. Support portions 22 and 22 are formed so as to be bridged above the shield portion.
[0023]
The card 4 has less influence on the impedance of the movable contact spring plates 23A and 23B, and in order to easily match the characteristic impedance, a synthetic resin such as Teflon (dielectric constant 2.0) close to the dielectric constant of air. It consists of a molded product using a molding material, and the pivot shaft 21 is integrally formed on both upper and lower end faces, and the spring support portions 24 that support the center of the movable contact spring plates 23A and 23B by insert molding are formed on both lower ends. The movable contact spring plates 23A and 23B are arranged between the shield plates 16A and 16B by providing the bridges and arranging the bridges above the shield portion arrangement portions, respectively.
[0024]
Here, the card 4 is bridged by the pivotal pivot 21 being pivotally supported by the pivot supports 22, 22 provided at the upper ends of the side walls 25, 25 on both ends of the base 1. The positions of the movable contact spring plates 23A and 23B held by the spring support portions 24 and 24 with respect to the upper surface of the base 1 are set with high accuracy.
[0025]
As shown in FIGS. 5 (a) and 5 (b), the rotary pivot portion 21 has a shaft portion 21a having a circular front cross section at the front portion, and a lower front cross section at the back portion of the shaft portion 21a. The rotation fulcrum portion 21b is integrally formed, and the lower end surface of the rotation fulcrum portion 21b is formed as an arcuate curved surface on both side surfaces so that the lowermost end position thereof coincides with the center height position of the shaft portion 21a.
[0026]
On the other hand, the rotation support portion 22 is formed along the inner surface of the side wall 25 and is formed at the upper end portion of the side wall 25 continuously with the support base 22a that supports the rotation fulcrum portion 21b at the upper end surface. The upper end is a square hole 22b, and the distance between the inner surfaces of both sides of the square hole 22b is the same as the diameter of the shaft portion 21a, and the distance from the bottom portion to the height position of the upper end surface of the rotation fulcrum portion 21b is an axis. It is slightly larger than the radius of the portion 21a so that a gap is formed between the lower end and the bottom portion of the shaft portion 21a.
[0027]
Now, the two movable contact spring plates 23A and 23B supported by insert molding on the respective spring support portions 24 of the card 4 are biased and arranged on both sides of the line connecting the fixed contact terminals 19a to 19c. Both end portions of the movable contact spring plate 23A constitute a movable contact that contacts and separates from one surface of the fixed contact 20 of the center fixed contact terminal 19a and one surface of the fixed contact terminal 19b of one end side. The both ends of the second movable contact spring plate 23B are in contact with the other surface of the fixed contact 20 of the central fixed contact terminal 19a and the other surface of the fixed contact 20 of the other fixed contact terminal 19b. The movable contacts are separated, and the contact breaking operation is performed by the rotation of the card 4.
[0028]
The shield plates 16A and 16B are formed by denting a portion between one end from the center in an opposite direction by bending a relief portion 26 for releasing the spring support portion 24 of the movable contact spring plates 23A and 23B on the adjacent side. The flat surfaces of the shield plates 16A and 16B on both sides of the escape portion 26 constitute an earth contact portion that contacts when both end portions of the movable contact spring plates 23A and 23B move away from the fixed contact 20 and move.
[0029]
The shield plates 16A and 16B have the same shape, and two ground terminals 27a and 27b are integrally formed (see FIGS. 6 and 7). Note that the distance from the end of each shield plate 16A, 16B to the nearest ground terminal is set to λ / 30 or less of the wavelength of the signal to be opened and closed so that the antenna effect does not occur.
[0030]
Further, when the shield plates 16A and 16B are disposed on the base 1, a ground terminal 27a is formed at one end of the formation portion of the relief portion 26 so as to be positioned between the fixed contact terminal 19a and 19b or 19c. The ground terminal 27a is bent at a right angle inward from the lower end of one end of the portion where the relief portion 26 is formed, and its tip is positioned on a straight line connecting the fixed contact terminals 18a to 18c when disposed on the base 1. It consists of a narrow-width plate piece that extends further from one end of the lower end portion of the hanging piece 28b that is bent at a right angle further downward than the tip of the extended wide piece 28a. The other ground terminal 27b is bent at a right angle inward from the position outside the escape portion 26 near the other end of the portion where the escape portion 26 is formed, and the tip thereof connects the fixed contact terminals 18a to 18c when disposed on the base 1. It consists of a narrow-width plate piece extending further from one end of the lower end portion of the hanging piece 28b 'bent at a right angle further downward than the tip of the wide piece 28a' formed so as to be positioned on a straight line.
[0031]
The shield plates 16A and 16B formed in this manner are arranged point-symmetrically on the base 1, so that the ground terminals 27a and 27b are located between the center fixed contact terminal 19a and the end fixed contact terminal 19b or 19c. Can be placed in.
[0032]
Thus, when the shield plates 16A and 16B are disposed at the shield portion disposition site, the opposing surfaces of both ends thereof are positioned in contact with both side surfaces of the ribs 17 and 17 as described above, respectively. The ground terminals 27a and 27b are formed on the lower surface side of the base 1 through insertion holes 29 penetrating the base 1 in correspondence with the width of the hanging pieces 28b and 28b 'integrally forming the ground terminals 27a and 27b. The hanging piece 28b or 28b ′ is inserted into the insertion hole 29 while protruding.
[0033]
Then, after the shield plates 16A and 16B are disposed at the shield portion placement sites as described above, the pivotal pivot portions 21 at both ends of the card 4 are rotated around the pivot support portions 22 at the side walls 25 and 25 at both ends of the base 1. The movable contact spring plate 23A is movable between the fixed contact terminals 19a and 19b and the escape portion 26 of the shield plate 16A by moving the card 4 so as to be movable and bridged above the shield portion. The contact spring plate 23B can be disposed between the fixed contact terminals 19a and 19c and the relief portion 26 of the shield plate 16A.
[0034]
When the card 4 is bridged, the shaft portion 21a is fitted from the upper end opening into the square hole 22b of the rotation support portion 22 on the side wall 25 side, and the rotation fulcrum portion 21b is arranged on the upper end surface of the fulcrum base 22a. The card 4 is bridged between both side walls of the base 1 by being placed as shown in FIG. Thereby, the horizontal hole 22 and the shaft portion 21a support in the horizontal direction, and the fulcrum base 22a and the rotation fulcrum portion 21b share the vertical support, and the center of the shaft portion 21a and the upper end surface of the fulcrum base 22a. By matching these positions, the pivotal pivot 21 can be reliably supported as compared with the case where it is supported at one place. Further, since the lower end of the shaft portion 21a is in a state of floating from the bottom portion of the square hole 22b, burrs generated when the base 1 is molded can be released.
[0035]
The card 4 arranged in the bridge is always pressed and biased by the return spring 31 in the direction of the shield plate 16A. The return spring 31 press-fits a base 31a into a press-fit groove 32 formed on one side inner surface of the side wall 36 of the base 1, and the tip of a spring piece 31b formed extending from the upper end of the base 31a toward the shield plate 16B is formed on the shield plate 16B. The card 4 is elastically contacted to the lower side surface of the card 4 located above the upper end, and the electromagnet block 5 is in a non-excited state so that the card 4 is rotated around the rotation pivot 21 to connect both end portions of the inner movable contact spring plate 23A. The shield plate 16A is brought into contact with the plate surface in the vicinity of both ends of the escape portion 26, and both end portions of the outer movable contact spring plate 23B are brought into contact with the fixed contacts 20, 20 of the fixed contact terminals 19a, 19c. In addition, the site | part which comprises the movable contact of the both ends of movable contact spring board 23A, 23B is divided | segmented into the fork.
[0036]
Here, as shown in FIG. 3A, the tip of the other piece 12b of the armature 12 is brought into contact with the side portion of the card 4 at the same position opposite to the side portion of the card 4 pressed by the spring piece 31b. The contact part and the pressing part of the spring piece 31b are opposed to each other so as to balance the force and stabilize the relay operation. Further, as shown in FIG. 9, each portion is formed as a convex portion 33 protruding from the side surface, so that friction between the spring piece 31 b and the other piece 12 b is reduced to reduce friction.
[0037]
The base 1 has a relay mechanism such as an electromagnetic block 5, shield plates 16A and 16B, fixed contact terminals 19a to 19d, a card 4 including movable contact spring plates 23A and 23B, an armature 12, a hinge spring 3 and a return spring 31. When the spring pressure of the return spring 31 and the hinge spring 3 is adjusted after the members are disposed, it is easily performed from the opening 25a of the side wall 25 of the base 1 and the opening 36a of the side wall 36 where the springs 31 and 3 face. Can do.
[0038]
If the case 2 is attached to the base 1 so that the side walls 25 on both ends and the side walls 36 on both sides of the base 1 are accommodated inside after the spring pressure adjustment is completed, a desired high frequency relay is completed.
[0039]
By the way, as a high frequency relay of this embodiment, it is related to the characteristic impedance of a transmission line according to a specification of 75Ω (when used for opening and closing video signals) and a specification of 50Ω (when opening and closing a wireless communication signal). By changing the shape of the movable contact spring plates 23A and 23B among the fixed contact terminals 19a to 19c, the movable contact spring plates 23A and 23B, and the shield plates 16A and 16B, the characteristic impedance is matched with the specified impedance. .
[0040]
FIG. 1A is a front view of the movable contact spring plate 16 corresponding to the 75Ω specification used in this embodiment, and FIG. 1B is a movable contact spring plate 16 corresponding to the 50Ω specification used in this embodiment. The movable contact spring plate 16 corresponding to the 75Ω specification has a protrusion 35 protruding at the upper edge of the portion inserted into the spring support 24 of the card 4 and a notch 38 at the center of the lower edge. On the other hand, the movable contact spring plate 16 corresponding to the 50Ω specification is formed with a notch 38 on the upper edge instead of the protrusion 35 inserted into the spring support 24 of the card 4, and the movable contact portion is bifurcated. The length of the dividing groove is longer than that of the 75Ω specification.
[0041]
The specifications of the high frequency relay can be set to 50Ω or 75Ω by selecting and incorporating the card 4 which is formed by insert molding the movable contact spring plate 16 and held on the spring support portion 24 at the time of assembly. Since the shape of the portion that goes out of the spring support 24 is the same for both the 50Ω specification and the 75Ω specification, the molding die of the card 4 including the spring support 24 can be used for any specification.
[0042]
In addition, on the ceiling surface of the case 2, two sets of a pair of rotation support portions 34 are provided, each of which fits into two recessed portions 34 provided on the upper end surface of the card 4. Each pair is a recess in which the lower part of the pair of rotation support portions 34 in the longitudinal (both ends) direction of the case 2 corresponds to each other even when both side directions when the case 2 is attached to the base 1 are reversed. 37. And the height position of the bottom part of the recessed part 37 by the side of the card | curd 4 is the same height position as the position of the lower end of the rotation fulcrum part 21b of the said rotation pivot part 21, When the case 2 is attached A rotation support portion 34 is fitted in the recessed portion 37, and the card 3 is supported not only from the base 1 side but also from the case 2 side, so that the rotation operation of the card 4 can be stabilized regardless of the relay mounting direction. To stabilize the high-frequency characteristics. The bottom of the recessed portion 37 is formed in an arcuate surface that allows the card 4 to turn in both directions in contact with the lower surface of the turning support portion 34.
[0043]
The high frequency relay of the present embodiment configured as described above has the fixed contact terminals 19a to 19c, the ground terminals 27a, 27b,..., And the coil terminals 10 and 10 protruding outward from the lower surface of the base 1 as shown in FIG. In the state shown in FIG. 2, the through-hole type is mounted on a printed circuit board, but it can also be used as a surface cloak type if each is bent outward at a right angle. In the present embodiment, the cross-sectional shapes of the fixed contact terminals 19a to 19c, the ground terminals 27a, 27b,..., And the coil terminals 10 and 10 corresponding to the terminal portions placed on the circuit pattern surface of the printed board as the surface capant type are shown. They are the same, so that the bending accuracy does not vary between the terminals when bending according to the surface cloak type. That is, any terminal can be bent with high accuracy.
[0044]
Next, the operation of the high frequency relay of the present embodiment configured as described above will be described.
[0045]
First, when the electromagnet block 1 is in a non-excited state, the card 4 is rotated in the direction of moving toward the electromagnet block 5 by the urging of the return spring 31, and the movable contact spring plate 23A has both ends of the shield plate 16A. The inner surface is grounded through ground terminals 27a and 27b.
[0046]
On the other hand, both end portions of the movable contact spring plate 23B come into contact with the fixed contacts 20 and 20 of the fixed contact terminals 19a and 19c to conduct between the fixed contact terminals 19a and 19c.
[0047]
Next, when the electromagnet block 5 is excited, the piece 12a of the armature 12 is attracted to the iron core 8, and the armature 12 rotates. Due to this rotation, the other piece 12b pushes the card 4 and rotates the counter electromagnet block 5 in the direction against the bias of the return spring 31. By this rotation, both ends of the movable contact spring plate 23B are separated from the fixed contacts 20 and 20 and contact the inner surface of the shield plate 16B, and are grounded via the ground terminals 27a and 27b.
[0048]
On the other hand, the movable contact spring plate 23A is brought into contact with the fixed contacts 20 and 20 of the fixed contact terminals 19a and 19b at both ends to conduct between the fixed contact terminals 19a and 19b. This state is the state of FIG.
[0049]
When the excitation of the electromagnet block 5 is stopped, the card 4 rotates so that the lower part moves to the electromagnet block 5 side by the urging of the return spring 31, and both end portions of the movable contact spring plate 23A are brought into contact with the inner surface of the shield plate 16A. The both ends of the movable contact spring plate 23B come into contact with the fixed contacts 20, 20 of the fixed contact terminals 19a, 19c.
( Basic form 1 )
In the first embodiment, the characteristic impedance of the transmission line is changed by changing the shape of the movable contact spring plates 23A and 23B in order to correspond to the specifications of 50Ω and 75Ω. However, in this basic embodiment, the characteristic impedance of the transmission line is related. The characteristic impedance of the transmission line is matched with the specified impedance by changing the shape of the shield plates 16A and 16B, which is one of the parts to be processed.
[0050]
In this basic form, the shield plates 16A and 16B having the shape shown in FIG. 2 are used in the case of 75Ω specification. However, in the case of 50Ω specification, for example, as shown in FIGS. The pieces 41, 41 extending from the upper end of the portion where no part is provided are folded back so as to be parallel to the plate surface of the shield plate 16 so that the characteristic impedance is matched with the specified impedance of 50Ω.
[0051]
11A and 11B, the shield plate 16 may have a shape in which one piece 41 ′ wider than the width of the piece 41 is folded back to obtain a predetermined characteristic impedance.
[0052]
Further, as shown in FIGS. 12A and 12B, the shield plate 16 may be provided with a notch 42 to change the shape, and the notch 42 may obtain a predetermined characteristic impedance.
[0053]
【The invention's effect】
According to the first aspect of the present invention, a shield space in which a ground contact portion electrically connected to the ground terminal and a fixed contact portion of the fixed contact terminal are arranged is provided on the base, and the shield space contacts the fixed contact portion. A movable contact spring plate is disposed so as to contact the ground contact portion when it is separable and separated from the fixed contact portion, and a spring support portion is provided that supports the movable contact spring plate by insert molding. in the high frequency relay which is disposed an electromagnet block to drive the card base outside shielded space, turned so that by matching the Mino shape change of the variable dynamic contact spring plate characteristic impedance of the entire transmission path with respect to the impedance of the specification The movable contact spring plate corresponding to the 75Ω specification has a protrusion protruding at the upper edge of the portion inserted into the spring support portion of the card, and the lower edge. A notch is provided in the center, and the movable contact spring plate corresponding to the 50Ω specification is formed with a notch instead of the above protrusion on the upper edge of the portion inserted into the spring support portion of the card, and the portion constituting the movable contact is bifurcated. The length of the groove to be divided is made longer than the movable contact spring plate corresponding to the 75Ω specification, so even if the impedance specification is different, for example, 50Ω specification and 75Ω specification, the shape of the movable contact spring plate can be changed. It is possible to reduce the production cost by sharing other parts with products with different specifications.
[Brief description of the drawings]
FIG. 1A is a front view of a movable contact spring plate corresponding to a 75Ω specification used in Embodiment 1 of the present invention. (B) is a front view of a movable contact spring plate corresponding to the 50Ω specification used in the above.
FIG. 2 is an exploded perspective view of the above.
FIG. 3A is a plan sectional view of the above. (B) is an AA cross-sectional arrow view of (a).
FIG. 4A is a top view of a base used in the above. (B) is front sectional drawing of the base used for the same as the above. (C) is a front view of the base used in the above. (D) is side sectional drawing of the base used for the same as the above.
FIG. 5A is an enlarged cross-sectional view in which a part of the main part is omitted. (B) is an enlarged front view in which a part of the main part is omitted.
FIG. 6A is a front view of one shield plate of the same. (B) is the front view of the other shield board same as the above.
FIG. 7 is a diagram illustrating the configuration of the shield plate same as above.
FIG. 8 is an explanatory view of a support portion of the pivoting pivot portion of the card of the above.
FIG. 9 is a side view of the card.
FIG. 10A is a top view of an example of a shield plate corresponding to the 50Ω specification of basic form 1 of the present invention. (B) is a front view of an example of the shield board corresponding to 50 ohm specification same as the above.
FIG. 11A is a top view of another example of the shield plate corresponding to the 50Ω specification. (B) is the front view of the other example of the shield board corresponding to 50 ohm specification same as the above.
FIG. 12A is a top view of another example of a shield plate corresponding to the 50Ω specification. (B) is the front view of another example of the shield board corresponding to 50 ohm specification same as the above.
FIG. 13 is an exploded perspective view of a conventional example.
[Explanation of symbols]
18 Movable contact spring plate 35 Protrusion 38 Notch

Claims (1)

A shield space in which a ground contact portion electrically connected to the ground terminal and a fixed contact portion of the fixed contact terminal are arranged is provided on the base, and the fixed contact portion can be freely opened and closed in the shield space. An electromagnetic block for driving a card provided with a spring support portion in which a movable contact spring plate is disposed so as to come into contact with a ground contact portion when being separated from the portion and the movable contact spring plate is supported by insert molding. in the high frequency relay which is arranged on the base outside the shielded space, has become so that by matching the characteristic impedance of the entire transmission path by Mino shape change of the variable dynamic contact spring plate relative impedance specifications,
The movable contact spring plate corresponding to the 75Ω specification has a protrusion protruding at the upper edge of the portion inserted into the spring support portion of the card, and a notch at the center of the lower edge.
In the movable contact spring plate corresponding to the 50Ω specification, a notch is formed in the upper edge of the portion inserted into the spring support portion of the card in place of the projection, and the length of the groove that divides the portion constituting the movable contact into two branches A high frequency relay characterized in that it is longer than a movable contact spring plate corresponding to the 75Ω specification .

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