High-frequency relay with excellent shielding performance

Abstract

A high frequency relay having excellent shielding performance includes a magnetic path section, a base section, and a movable contact section, the base section includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body in which the one lower ground shield piece and the at least two fixed contacts are integrated by injection molding, the fixed contact has a fixed contact exposed part exposed on the surface of the plastic body, and the fixed contact exposed part is provided with a contact for contacting a movable spring, the upper surface of the contact is higher in the height direction than the upper surface of the lower ground shield piece, the upper ground shield piece is attached to the plastic body, is higher in the height direction than the upper surface of the contact, and is grounded by the lower ground shield piece. The present invention is characterized in that a shielded space grounded above and below can be formed in a part corresponding to signal transmission inside the relay, thereby providing a good shielding effect, a simple molding process, easy realization, good processing precision, and high assembly efficiency and manufacturing efficiency.

Description

[Technical Field]

[0001] The present invention claims priority to Chinese patent application No. 202111665355.9, filed on December 30, 2021, and Chinese patent application No. 202111665354.4, the entire disclosures of which are incorporated herein by reference.

[0002] The present invention relates to the technical field of relays, and more particularly to a high frequency relay having excellent shielding performance. [Background technology]

[0003] High-frequency relays are used to switch high-frequency circuits and transmit high-frequency signals, necessitating the provision of a shielding structure either internally or externally. Prior art high-frequency relays use an all-metal base, with the base divided into two parts: an upper base and a lower base. Both bases are made of metal, with leads injection-molded onto the lower base. The upper and lower bases are then welded together to form the base, which is then welded to a metal case and grounded via the case's grounding pin. While the upper and lower bases of such high-frequency relays each form a grounding shield, and high-frequency signals are transmitted through the grounding shield, providing excellent shielding. However, the following problems remain: First, the molding process for the metal upper base, metal lower base, and metal case is complex and difficult, requiring secondary processing. Second, after the upper and lower metal bases are processed, they must be combined with the fixed contacts through injection molding. This results in a certain level of insulation between the fixed contacts and the metal base, resulting in poor insulation performance. The injection molding process of combining the base material and the fixed contacts is difficult and results in poor dimensional accuracy. Third, the metal base cannot directly mold the ground pin, so the metal base must be grounded by welding it to the metal case. The process of injecting adhesive and molding the case and base results in a small gap between the case and base, resulting in poor welding reliability. Fourth, the process flow is complex and inefficient, requiring the following steps: molding the upper and lower metal bases → injection molding the lower metal base and fixed contacts → welding the upper and lower bases together → assembling and welding the base and case together → injecting adhesive and molding. Fifth, the adhesive strength between the metal and the molding adhesive is weak, resulting in a significant decrease in sealing performance after reflow. Another prior art high frequency relay uses a plastic injection molding method for the base, in which the base is injection molded by combining a fixed contact and plastic, and a ground shield tape is provided on one side of the base or above it to form a tape-like transmission structure.The molding process for the base of this high-frequency relay is simple, easy to implement, has good processing accuracy, and low material costs. Furthermore, plastic has better adhesion to molding adhesives than conventional metal bases, resulting in better sealing performance for the entire relay. However, the biggest problem with this type of high-frequency relay is as follows: the upper and lower bases do not have a shielding space in the area corresponding to signal transmission inside the relay, resulting in poor shielding effectiveness and not meeting the requirements for use in high-frequency relays. It is therefore necessary to further improve the shielding effect by adding a metal shielding component to the outside of the relay. Furthermore, when applied by a client, the upper and lower layer shielding structure can only be achieved to a certain extent by providing the entire grounding structure on the PCB board and mating it. Summary of the Invention

[0004] The object of the present invention is to overcome the drawbacks of the prior art and to provide a high-frequency relay with excellent shielding performance, characterized by having a good shielding effect by forming a shielded space grounded above and below the portion of the relay that corresponds to signal transmission, and having a simple molding process, ease of implementation, good processing accuracy, and high assembly and manufacturing efficiency.

[0005] The technical solution of the present invention to solve the technical problem is a high-frequency relay with excellent shielding performance, the high-frequency relay including a magnetic path part, a base part, and a movable contact part, the magnetic path part and the movable contact part are respectively attached to the base part and interlock with each other, the base part includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body formed by injection molding the one lower ground shield piece and the at least two fixed contacts, the fixed contact has a fixed contact exposed part exposed on the surface of the plastic body, and the fixed contact exposed part is provided with a contact for contacting a movable spring, the upper surface of the contact is higher in height than the upper surface of the lower ground shield piece, the upper ground shield piece is attached to the plastic body, is higher in height than the upper surface of the contact, and is grounded by the lower ground shield piece, so that a shielded space is formed in the base part, composed of a gap between the upper ground shield piece and the lower ground shield piece, which can accommodate a bridge-type movable contact in the movable contact part.

[0006] The plastic body is provided with a groove, the exposed portion of the fixed contact is located at the bottom of the groove and exposed to the bottom surface of the groove in the plastic body, and the upper ground shield piece is attached to the groove in the plastic body. The one lower ground shield piece and at least two fixed contacts are formed by pressing using one tape material, and the lower ground shield piece and the fixed contacts are combined with the plastic body by injection molding so that they are flush with each other, so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area.

[0007] The plastic body is a rectangular parallelepiped block, and the peripheral edge of the plastic body has side walls that protrude upward and are surrounded by the side walls to form the groove, and the one lower ground shield piece and at least two fixed contacts are exposed on the same plane at the bottom of the groove of the plastic body.

[0008] In the groove of the plastic body, a plurality of support blocks integrally connected to the plastic body are further provided in the cover area corresponding to the lower ground shield piece, the plurality of support blocks respectively cover the area corresponding to the lower ground shield piece, the upper ground shield piece is hung on the plurality of support blocks, and the upper surface of the side wall is higher than the upper surface of the upper ground shield piece.

[0009] The plurality of support blocks include first support blocks respectively positioned at the four corners of the groove of the plastic body and second support blocks respectively positioned on the two long sides of the rectangle of the plastic body, and welding pieces respectively extending from both sides of the lower ground shield piece, the welding pieces being bent upward to expose the upper surface of the welding piece to the upper surface of the second support block, and the upper ground shield piece being fixed to the welding pieces by welding at the corresponding position.

[0010] A notch is further provided on the long side wall corresponding to the rectangular shape of the plastic body at a position corresponding to the second support block, and the welding piece of the lower grounding shield piece extends to the notch, and the height of the upper surface of the welding piece at the notch is the same as the height of the upper surface of the second support block. A positioning protrusion is further integrally extended from the upper grounding shield piece at a position corresponding to the notch of the plastic body, and the positioning protrusion of the upper grounding shield piece is positioned in the notch of the plastic body and fixed to the welding piece by welding.

[0011] The one lower ground shield piece and the at least two fixed contacts are each provided with a ground pin or lead pin extending outward from the side of the plastic body, wherein the ground pins of the lower ground shield piece include at least four ground pins distributed at the four corners of the rectangle of the plastic body.

[0012] The movable contact portion includes at least one bridge-type movable contactor that is linked to the magnetic path portion and an elastic return member for returning the bridge-type movable contactor, wherein the bridge-type movable contactor is arranged in the gap between the upper ground shield piece and the lower ground shield piece, and both ends of the bridge-type movable contactor correspond to the contact positions of two of the at least two fixed contactors, respectively, and the lower end of the elastic return member abuts against the lower ground shield piece, so that the upper end of the elastic return member presses the bridge-type movable contactor against the upper ground shield piece during return.

[0013] The magnetic path section includes a coil section and an armature section that fit together, the coil section is attached to the plastic body, the armature section is supported by the upper ground shield piece, the upper ground shield piece is integrally connected to the armature section support seat by injection molding, and there are two armature section support seats, each located at the midpoint of the two long sides of the upper ground shield piece.

[0014] The at least two fixed contacts include two normally-open end fixed contacts, two common end fixed contacts, and two normally-closed end fixed contacts located on both sides of the rectangular longitudinal direction of the plastic body, wherein the two common end fixed contacts are located in the middle of the long sides of the plastic body, and the two normally-open end fixed contacts and the two normally-closed end fixed contacts are located at both ends of the long sides of the plastic body, respectively; the plurality of support blocks further includes a third support block that separates the two fixed contacts on both sides of the longitudinal direction; the bridge-type movable contact is located between the contacts of the normally-closed end fixed contact and the contacts of the common end fixed contact or between the contacts of the normally-open end fixed contact and the contacts of the common end fixed contact, and both ends of the bridge-type movable contact extend beyond the range of the corresponding two contacts.

[0015] The movable contact portion includes two units fitted to both sides of the armature portion, each unit including two bridge-type movable contacts, one elastic return member, and an injection-molded member formed by injection molding to integrate the two bridge-type movable contacts and the elastic return member, the elastic return member and the injection-molded member forming a cross-shaped structure, and the third support block also forms a corresponding cross-shaped groove so as to move up and down in accordance with the cross-shaped structure formed by the elastic return member and the injection-molded member.

[0016] The coil portion further includes a coil lead pin and a support pin integrally molded with the coil holder by injection molding, the plastic body further has a slot, the coil lead pin of the coil portion is inserted into the slot of the plastic body, the support pin of the coil portion is hooked onto the upper ground shield piece and fixed with adhesive, and the plastic body corresponding to the position where the adhesive between the support pin and the upper ground shield piece is aligned is further provided with an adhesive reservoir groove surrounded by the side walls of the groove, the adhesive separator and the support block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] In the present invention, the base portion includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body formed by injection molding the one lower ground shield piece and the at least two fixed contacts, the fixed contact having a fixed contact exposed portion exposed on the surface of the plastic body, the fixed contact exposed portion having a contact for contacting a movable spring, the upper surface of the contact being higher in height than the upper surface of the lower ground shield piece, the upper ground shield piece being attached to the plastic body, being higher in height than the upper surface of the contact, and being grounded by the lower ground shield piece, thereby forming a shielded space in the base portion, composed of a gap between the upper and lower ground shield pieces, capable of accommodating a bridge-type movable contact at the movable contact portion. This structure of the present invention allows for the formation of a shielded space grounded above and below the portion corresponding to signal transmission within the relay, which has the advantages of good shielding effect, a simple molding process, ease of implementation, high processing precision, and high assembly and manufacturing efficiency.

[0019] Furthermore, in the present invention, one lower ground shield piece and at least two fixed contacts are formed by pressing one tape material, and the lower ground shield piece and the fixed contacts are combined with the plastic body by injection molding so that they are flush with each other, so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area. According to this structure of the present invention, the signal transmission section (i.e., the portion of the fixed contact including the contact point) is designed to be flush with the lower ground shield piece, and a gap is provided between the lower ground shield piece and the signal transmission section, thereby achieving impedance matching between the signal transmission section and the lower ground shield piece and realizing distortion-free transmission of high-frequency signals.

[0020] Furthermore, in the present invention, the groove in the plastic body further includes a plurality of support blocks integrally connected to the plastic body in a covering area corresponding to the lower ground shield piece, the plurality of support blocks respectively covering the area corresponding to the lower lower ground shield piece, the upper ground shield piece being hung on the plurality of support blocks, and the upper surface of the side wall being higher than the upper surface of the upper ground shield piece. With this structure of the present invention, the plurality of support blocks contribute to improving the flatness of the upper ground shield piece after assembly, ensuring consistency of characteristic impedance and improving high-frequency signal transmission performance, and also contribute to improving the horizontal flatness of the armature and core after assembly of the coil, ensuring reliability of relay operation, and the side wall being higher than the upper ground shield piece improves the sealing performance of the relay.

[0021] Furthermore, in the present invention, the lower end of the elastic return member abuts against the lower ground shield piece, and the upper end of the elastic return member presses the bridge-type movable contact against the upper ground shield piece when returning. With this structure of the present invention, the reaction force mechanism of the movable contact (i.e., the elastic return member) and the lower ground shield piece are always on, preventing the influence of irregular shapes on high-frequency performance and improving the mechanical life and reliability of the relay.

[0022] The present invention will be described in more detail below with reference to the drawings and examples, but the high frequency relay having excellent shielding performance of the present invention is not limited to the examples. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of a three-dimensional structure (not including a case) according to a first embodiment of the present invention. [Figure 2] FIG. 1 is an exploded schematic view of the three-dimensional structure of Example 1 of the present invention. [Figure 3] 1 is a structural cross-sectional view (not including a case) of a first embodiment of the present invention. [Figure 4]1 is a schematic diagram of a three-dimensional structure in which a base portion and a movable contact portion are combined according to a first embodiment of the present invention. [Figure 5] 1 is a partially exploded schematic view of a base portion and a movable contact portion according to a first embodiment of the present invention. [Figure 6] 1 is a plan view of a combination of a base portion and a movable contact portion according to a first embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA in FIG. 6. [Figure 8] 1 is a schematic diagram of a three-dimensional structure in which a base portion (not including an upper ground shield piece) and a movable contact portion are fitted together according to the first embodiment of the present invention. [Figure 9] FIG. 9 is an enlarged view of part B in FIG. 8. [Figure 10] 1 is a schematic diagram of the three-dimensional structure of a base portion (not including an upper ground shield piece) according to a first embodiment of the present invention. [Figure 11] 1 is a schematic diagram showing an upper ground shield piece, a lower ground shield piece, and a fixed contact fitted together according to the first embodiment of the present invention; [Figure 12] FIG. 12 is an enlarged view of part C in FIG. [Figure 13] 1 is a schematic diagram of a tape material including a lower ground shield piece and a fixed contact according to a first embodiment of the present invention. [Figure 14] 10 is a schematic diagram of a three-dimensional structure of a movable contact portion according to a second embodiment of the present invention. FIG. [Figure 15] 10 is a schematic diagram of the three-dimensional structure of the movable contact portion of Example 2 of the present invention (excluding the plastic body). [Figure 16] FIG. 10 is a schematic diagram of a tape material of a movable contact portion according to a second embodiment of the present invention. [Figure 17] FIG. 10 is a schematic diagram of the structure of the movable contact portion according to the second embodiment of the present invention after the tape material is injection molded. [Figure 18] 10 is a schematic diagram of a structure in which a tape material of a movable contact portion according to a second embodiment of the present invention is injection molded and then an elastic return member is punched out. FIG. [Figure 19] 1 is a schematic diagram of the external shape of a high-frequency relay (not including a case) according to a second embodiment of the present invention. [Figure 20] FIG. 10 is a cross-sectional view (not including the case) of a high-frequency relay according to a second embodiment of the present invention. [Figure 21] FIG. 10 is an exploded schematic view of the three-dimensional structure of a high-frequency relay according to a second embodiment of the present invention. [Figure 22] FIG. 6 is a schematic diagram illustrating a partial structure of a high-frequency relay according to a second embodiment of the present invention. [Figure 23] FIG. 10 is an exploded schematic view of a part of the structure of a high-frequency relay according to a second embodiment of the present invention. [Figure 24] 10 is a schematic diagram showing a state in which a base and a movable contact portion of a high-frequency relay according to a second embodiment of the present invention are fitted together. FIG. [Figure 25] 10 is a schematic diagram of a three-dimensional structure of a movable contact portion according to a third embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] Exemplary embodiments will be described more fully below with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many different forms and are not limited to the embodiments described herein. Relative terms, such as "above" and "below," are used herein to describe the relative relationship between one assembly and another assembly shown in the drawings. These terms are used merely for convenience and are based on, for example, the exemplary orientation shown in the drawings. If the device shown in the drawings is inverted, the assembly located "above" will be understood to become the assembly located "below." Other relative terms, such as "top" and "bottom," have similar meanings. When a structure is located "above" another structure, this may mean that the structure is integrally formed on the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure by another structure.

[0025] The terms "a," "one," "the," and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprise" and "have" are used to denote an open inclusion and mean that other elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first," "second," etc. are used as indicative terms only and not as a limitation of their subject matter.

[0026] Example 1 1 to 13, a high-frequency relay with excellent shielding performance according to the present invention includes a magnetic path section 1, a base section 2, and a movable contact section 3, the magnetic path section 1 and the movable contact section 3 being attached to the base section 2 and interlocking with each other, the base section 2 including one upper ground shield piece 4, one lower ground shield piece 5, at least two fixed contacts 6, and a plastic body 7 formed by injection molding the one lower ground shield piece 5 and the at least two fixed contacts 6 together. The fixed contact 6 has a fixed contact exposed section 61 exposed on the surface of the plastic body 7, and the fixed contact exposed section 61 is provided with a contact 62 for contacting a movable spring, the upper surface of the contact 62 being higher in the height direction than the upper surface of the lower ground shield piece 5. The upper ground shield piece 4 is attached to the plastic body 7, is higher in height than the upper surface of the contact 62, and is grounded by the lower ground shield piece 5, thereby forming a shielded space 30 in the base portion 2, which is composed of the gap between the upper ground shield piece 4 and the lower ground shield piece 5 and can accommodate a bridge-type movable contactor 31 in the movable contact portion 3 (see Figure 3).

[0027] In this embodiment, a groove 71 is provided in the plastic body 7, the exposed portion 61 of the fixed contact 6 is located at the bottom of the groove 71 and is exposed to the bottom surface of the groove 71 of the plastic body 7, and the upper ground shield piece 4 is attached to the groove 71 of the plastic body 7.

[0028] In this embodiment, as shown in FIG. 13, the one lower ground shield piece 5 and at least two fixed contacts 6 are formed by pressing using one tape material, and the lower ground shield piece 5 and the fixed contacts 6 are combined with the plastic body 7 by injection molding so that they are flush with each other (as shown in FIG. 10), so that the lower ground shield piece and the fixed contacts are positioned complementary to each other in the same planar area.

[0029] In this embodiment, the plastic body 7 is a rectangular parallelepiped block, and the peripheral edge of the plastic body 7 has side walls 72 that protrude upward, and the groove 71 is formed by being surrounded by the side walls 72, and the one lower ground shield piece 5 and at least two fixed contacts 6 are exposed on the same plane at the bottom of the groove 71 of the plastic body 7.

[0030] In this embodiment, in the groove 71 of the plastic body 7, a plurality of support blocks 73 integrally connected to the plastic body 7 are further provided in the cover area corresponding to the lower ground shield piece 5, and the plurality of support blocks 73 respectively cover the corresponding area of ​​the lower ground shield piece 5 below, the upper ground shield piece 4 is hung on the plurality of support blocks 73, and the upper surface of the side wall 72 is higher than the upper surface of the upper ground shield piece 4.

[0031] In this embodiment, the multiple support blocks 73 include first support blocks 731 located at the four corners of the groove 71 of the plastic body 7 and second support blocks 732 located at the two long sides of the rectangle of the plastic body, and welding pieces 51 extend from both sides of the lower grounding shield piece 5, and the welding pieces 51 are bent upward to expose the upper surface of the welding piece 51 to the upper surface of the second support block 732, and the upper grounding shield piece 4 is fixed to the welding piece 51 by welding at the corresponding position and is grounded through the grounding shield piece 5.

[0032] In this embodiment, a notch 74 is further provided on the long side wall corresponding to the rectangular shape of the plastic body 7 at a position corresponding to the second support block 732, and the welding piece 51 of the lower grounding shield piece 5 extends to the notch 74, and the height of the upper surface of the welding piece 51 at the notch 74 is the same as the height of the upper surface of the second support block 732. A positioning protrusion 41 is further integrally extended from the upper grounding shield piece 4 at a position corresponding to the notch of the plastic body 7, and the positioning protrusion 41 of the upper grounding shield piece 4 is positioned in the notch 74 of the plastic body 7 and fixed to the welding piece 51 by welding.

[0033] In this embodiment, the one lower ground shield piece 5 and the at least two fixed contacts 6 are each provided with a ground pin or lead pin extending outward from the side of the plastic body, i.e., the lower ground shield piece 5 is provided with a ground pin 52, and the fixed contacts 6 are provided with lead pins 63. Here, the ground pins 52 of the lower ground shield piece 5 include at least four ground pins 52 distributed at the four corners of the rectangle of the plastic body 7.

[0034] In this embodiment, the movable contact portion 3 includes at least one bridge-type movable contactor 31 that moves in conjunction with the magnetic path portion 1, and an elastic return member 32 for returning the bridge-type movable contactor. The bridge-type movable contactor 31 is disposed in the gap between the upper ground shield piece 4 and the lower ground shield piece 5, and both ends of the bridge-type movable contactor 31 correspond to the contact positions of two of the at least two fixed contactors 6, respectively. The lower end of the elastic return member 32 abuts against the lower ground shield piece 5, and the upper end of the elastic return member 32 presses the bridge-type movable contactor 31 against the upper ground shield piece 4 during return.

[0035] In this embodiment, the magnetic path section 1 includes a coil section 11 and an armature section 12 that fit together, the coil section 11 is attached to the plastic body 7, and the armature section 12 is supported by the upper ground shield piece 4. The upper ground shield piece 4 is integrally connected to an armature support seat 42 made of plastic material by injection molding, and there are two armature support seats 42, each located midway between the two long sides of the upper ground shield piece 4.

[0036] In this embodiment, the at least two fixed contacts include two normally-open end fixed contacts 64, two common end fixed contacts 65, and two normally-closed end fixed contacts 66, located on both sides of the rectangular longitudinal direction of the plastic body. Here, the two common end fixed contacts 65 are located in the middle of the long side of the plastic body 7, and the two normally-open end fixed contacts 64 and the two normally-closed end fixed contacts 66 are located at both ends of the long side of the plastic body, respectively. The multiple support blocks 73 further include a third support block 733 that separates the two fixed contacts on both sides of the longitudinal direction. The bridge-type movable contact 31 is located between the contact of the normally-closed end fixed contact 66 and the contact of the common end fixed contact 65 or between the contact of the normally-open end fixed contact 64 and the contact of the common end fixed contact 65, and both ends of the bridge-type movable contact 31 extend beyond the range of the corresponding two contacts.

[0037] In this embodiment, the movable contact part 3 includes two units fitted to both sides of the armature part 12, each unit including two bridge-type movable contacts 31, one elastic return member 32, and an injection-molded part 33 formed by injection molding to integrate the two bridge-type movable contacts and one elastic return member, the elastic return member 32 and the injection-molded part 33 forming a cross-shaped structure, and the third support block 733 also has a corresponding cross-shaped groove formed therein to move up and down in accordance with the cross-shaped structure formed by the elastic return member 32 and the injection-molded part 33. The upper ground shield piece 4 is further provided with a through-hole 43 to allow the cross-shaped structure formed by the elastic return member 32 and the injection-molded part 33 to move up and down.

[0038] In this embodiment, the coil unit further includes a coil lead pin 13 and a support pin 15 integrally molded with the coil holder 14 by injection molding. The plastic body 7 further includes a slot 75, the coil lead pin 13 of the coil unit 11 is inserted into the slot 75 of the plastic body 7, and the support pin 15 of the coil unit 11 is hooked onto the upper ground shield piece 4 and fixed with adhesive. The plastic body 7 further includes an adhesive reservoir groove 76 surrounded by a side wall 72 of the groove, an adhesive separator 77, and support blocks (i.e., a first support block 731 and a second support block 732) at a position corresponding to where the adhesive between the support pin 15 and the upper ground shield piece 4 is to be applied.

[0039] In the high-frequency relay with excellent shielding performance according to the present invention, the base 2 includes one upper ground shield piece 4, one lower ground shield piece 5, at least two fixed contacts 6, and a plastic body 7 formed by integrating the one lower ground shield piece and the at least two fixed contacts by injection molding. The fixed contact 6 has a fixed contact exposed portion 61 exposed on the surface of the plastic body 7, and the fixed contact exposed portion 61 is provided with a contact 62 for contacting a movable spring, the upper surface of the contact 62 being higher in height than the upper surface of the lower ground shield piece 5. The upper ground shield piece 4 is attached to the plastic body 7, is higher in height than the upper surface of the contact 62, and is grounded by the lower ground shield piece 5. This forms a shielded space 30 in the base 2, comprised of a gap between the upper ground shield piece 4 and the lower ground shield piece 5, capable of accommodating a bridge-type movable contact 31 at the movable contact portion. According to this structure of the present invention, a shielded space can be formed inside the relay that is grounded above and below the portion corresponding to signal transmission (as shown by path D in FIG. 3), which provides a good shielding effect, simplifies the molding process, is easy to implement, has good processing accuracy, and is highly efficient in assembly and manufacturing.

[0040] In the high-frequency relay with excellent shielding performance according to the present invention, one lower ground shield piece 5 and at least two fixed contacts 6 are formed by pressing one tape material, and then the lower ground shield piece 5 and the fixed contacts 6 are combined with the plastic body 7 by injection molding so that they are flush with each other, so that the lower ground shield piece 5 and the fixed contacts 6 are complementary in position in the same planar area. According to this structure of the present invention, the fixed contacts of the signal transmission section (i.e., the portions of the fixed contacts including the contact points) are designed to be flush with the lower ground shield piece, and a gap is provided between the lower ground shield piece and the signal transmission section, thereby achieving impedance matching between the signal transmission section and the lower ground shield piece and realizing distortion-free transmission of high-frequency signals.

[0041] In the high-frequency relay with excellent shielding performance according to the present invention, the groove 71 of the plastic body 7 further includes a plurality of support blocks 73 integrally connected to the plastic body 7 in the cover area corresponding to the lower ground shield piece 5, the plurality of support blocks 73 covering the corresponding area of ​​the lower ground shield piece 5, the upper ground shield piece 4 being hung on the plurality of support blocks 73, and the upper surface of the side wall 72 being higher than the upper surface of the upper ground shield piece 4. With this structure according to the present invention, the plurality of support blocks contribute to improving the flatness of the upper ground shield piece after assembly, ensuring the consistency of characteristic impedance and improving the transmission performance of high-frequency signals, and also contribute to improving the horizontal flatness of the armature and core after assembly of the coil, ensuring the reliability of relay operation. The side wall being higher than the upper ground shield piece improves the sealing performance of the relay.

[0042] In the high-frequency relay with excellent shielding performance according to the present invention, the lower end of the elastic return member 32 abuts against the lower ground shield piece 5, and the upper end of the elastic return member 32 presses the bridge-type movable contact 31 against the upper ground shield piece 4 during the return. With this structure according to the present invention, the reaction force mechanism of the movable contact (i.e., the elastic return member) and the lower ground shield piece are always on, which prevents the influence of irregular shapes on high-frequency performance and improves the mechanical life and reliability of the relay.

[0043] Furthermore, a high-frequency relay is a relay for switching a high-frequency circuit, and a high-frequency relay in the prior art usually includes a magnetic path part, a base part, and a movable contact part. The fixed spring part of such a high-frequency relay is integrated into a base to form the base part together, the magnetic path part is attached to the upper surface of the base part, the armature in the magnetic path part has a seesaw structure and is fitted into the movable contact part built into the base, the base is provided with a groove, the movable contact part includes a combination of movable springs and a reaction spring, the combination of movable springs is attached to the base via the reaction spring, and one end of the armature operates to lower the combination of movable springs. When the armature is pushed down, the movable spring combination moves the bridge-type movable contact in the movable spring combination downward within the groove against the elastic force of the reaction spring, and when both ends of the bridge-type movable contact make contact with the contacts of the two fixed contacts, the circuit connected by the two fixed contacts is made conductive, and when one end of the armature moves upward, the movable spring combination moves the bridge-type movable contact in the movable spring combination upward within the groove under the elastic force of the reaction spring, and when both ends of the bridge-type movable contact are separated from the contacts of the two fixed contacts, the circuit connected by the two fixed contacts is broken. In the prior art, the movable spring combination and the reaction spring of the movable contact part are two separate parts, which results in a large number of parts in the movable contact part, poor assembly stability, low material utilization rate, and high manufacturing costs.

[0044] The present invention further provides a movable contact for transmitting high frequency signals and a high frequency relay thereof, which has the characteristics of fewer parts, good structural strength, good assembly stability, high material utilization rate, and low manufacturing cost.

[0045] The technical solution of the present invention to solve the technical problem is a movable contact part for transmitting high frequency signals, which includes a first sheet body, a second sheet body, and a plastic body formed by injection molding to cover the middle parts of the first sheet body and the second sheet body without connecting them to each other to form the entire structure, wherein the first sheet body is provided as a bridge-type movable contact of the movable contact part, and the second sheet body is bent so that both ends have downward protrusions to form an elastic return member of the movable contact part.

[0046] The first sheet body and the second sheet body are formed into the same strip material by pressing, and both ends of the first sheet body are pressed to form the bridge-type movable contactor, and the second sheet body is bent by pressing so that both ends have downward protrusions to form the elastic return member.

[0047] The plastic body has an elongated shape and is disposed perpendicular to the first sheet body on the same horizontal plane.

[0048] The upper surface of the plastic body is provided with a protrusion for fitting onto the armature of the relay.

[0049] The tape material is rectangular, and the first sheet body and the second sheet body are arranged in parallel in the same direction along the lengthwise direction or widthwise direction of the tape material.

[0050] There are two first sheets and one second sheet, and in the parallel arrangement, the one second sheet is located in the middle, the two first sheets are located on both sides of the second sheet, and the one second sheet and the plastic body form a cross structure.

[0051] There is one first sheet body and two second sheets, and in the parallel arrangement, the one first sheet body is located in the middle, the two second sheets are located on both sides of the first sheet body, and the two second sheets and the plastic body form an L-shaped structure.

[0052] The second sheet body has a frame shape, and the plastic body fills a part of the intermediate through-hole of the frame shape of the second sheet body.

[0053] A high-frequency relay including a magnetic path portion, a base portion, and the above-mentioned movable contact portion, wherein the magnetic path portion is attached to the upper surface of the base portion, the base portion is provided with a groove into which the movable contact portion is fitted, the movable contact portion is fitted into the groove by the elastic properties of an elastic return member, and the bridge-type movable contact of the movable contact portion is restricted to be positioned between the contact point of the fixed spring of the base portion and an upper stopper piece, and the armature portion of the magnetic path portion is fitted into the plastic body of the movable contact portion.

[0054] A plurality of support blocks are provided in the recessed groove of the base portion, and the plurality of support blocks form a cross-shaped groove or an L-shaped groove into which the plastic body of the movable contact portion and the second sheet body are inserted.

[0055] The magnetic path portion further includes a coil portion that fits into the armature portion, the coil portion being attached to the base portion, and the armature portion fitting into the coil portion in a seesaw shape.

[0056] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0057] In the present invention, the first sheet, the second sheet, and the plastic body formed by injection molding the first and second sheet members without connecting them to each other form a movable contact for transmitting high frequency signals, and the first sheet serves as a bridge-type movable contact of the movable contact, and the second sheet is bent so that both ends protrude downward to form an elastic return member of the movable contact. This structure of the present invention has the advantages of fewer parts, good structural strength, good assembly stability, high material utilization rate, and low manufacturing costs.

[0058] Example 2 14 to 18, the movable contact portion for transmitting high frequency signals according to the present invention includes a first sheet body 11A and a second sheet body 12A formed by pressing from the same tape material 1A, and a plastic body 2A formed by injection molding to cover the middle portions of the first sheet body 11A and the second sheet body 12A without connecting them to each other to form the entire structure, wherein both ends of the first sheet body 11A are pressed to form bridge-type movable contactors 4A of the movable contact portion 3A, and both ends of the second sheet body 12A are bent by pressing so that they have downward protrusions 51A to form elastic return members 5A of the movable contact portion 3A.

[0059] In this embodiment, the plastic body 2A has an elongated shape and is disposed perpendicular to the first sheet body 11A on the same horizontal plane.

[0060] In this embodiment, a protrusion 21A for fitting onto the armature of a relay is provided on the upper surface of the plastic body 2A.

[0061] In this embodiment, the tape material 1A is rectangular, and the first sheet body 11A and the second sheet body 12A are arranged in parallel in the same direction along the longitudinal direction of the rectangular tape material.

[0062] In this embodiment, there are two first sheet members 11A and one second sheet member 12A. In the parallel arrangement, the second sheet member 12A is located in the middle, and the two first sheet members 11A are located on either side of the second sheet member 12A, so that the second sheet member 12A and the plastic body 2A form a cross-shaped structure. After pressing is completed, the movable contact portion 3A includes two bridge-type movable contactors 4A, one elastic return member 5A, and a plastic body 2A in which the two bridge-type movable contactors 4A and the elastic return member 5A are injection-molded into the entire structure. The plastic body 2A has two protrusions 21A for fitting into the armature of the relay.

[0063] In this embodiment, the second sheet body 12A is frame-shaped, and the plastic body 2A is filled in a part of the frame-shaped intermediate through-hole 121A of the second sheet body 12A.

[0064] 14 to 24, a high-frequency relay according to the present invention includes a magnetic path portion 6A, a base portion 7A, and the above-described movable contact portion 3A. The base portion 7A includes a base 71A, a fixed contactor 72A including a fixed contact 721A, and an upper stopper piece 73A. Here, the fixed contact 72A is fitted to the base 71A by injection molding, the magnetic path portion 6A is attached to the upper surface of the base portion 7A, and the base portion 7A is provided with a groove 711A for fitting the movable contact portion 3A, i.e., the base 71A is provided with a groove 711A for fitting the movable contact portion 3A, and the movable contact portion 3A is fitted into the groove 711A by the elastic properties of the elastic return member 5A, and the bridge-type movable contact 4A of the movable contact portion 3A is restricted to be positioned between the contact point 721A of the fixed spring of the base portion and the upper stopper piece 73A, and the armature portion 61A of the magnetic path portion 6A is fitted into the plastic body 2A of the movable contact portion 3A.

[0065] In this embodiment, a plurality of support blocks 712A are provided in the groove 711A of the base portion 7A, that is, a plurality of support blocks 712A are provided in the groove 711A of the base 71A, and the plurality of support blocks 712A form a cross-shaped groove 713A into which the plastic body 2A and the elastic return member 5A of the movable contact portion 3A are fitted.

[0066] In this embodiment, the upper stopper piece 73A is an integrated grounding shield piece, and is attached to the recessed groove 711A of the base 71A. The upper stopper piece 73A has a cross-shaped retraction hole 731A, which is used to retract the plastic body 2A and elastic return member 5A of the movable contact portion 3A from moving up and down.

[0067] In this embodiment, the magnetic path portion 6A further includes a coil portion 62A that fits into the armature portion 61A, the coil portion 62A is attached to the base portion 7A, and the armature portion 61A is seesaw-shaped and fits into the coil portion 62A.

[0068] The movable contact for transmitting high-frequency signals and the high-frequency relay thereof according to the present invention comprise a first sheet 11A and a second sheet 12A formed by pressing on the same tape material 1A, and a plastic body 2A formed by injection molding to cover the middle portions of the first sheet 11A and the second sheet 12A without connecting them to each other, thereby forming a movable contact 3A for transmitting high-frequency signals. Both ends of the first sheet 11A are pressed to form bridge-type movable contacts 4A of the movable contact 3A. Both ends of the second sheet 12A are pressed to form downward protrusions 51A, thereby forming an elastic return member 5A of the movable contact 3A. According to this structure of the present invention, the movable contact (i.e., bridge-type movable contact 4A) and the repulsive mechanism (i.e., elastic return member 5A) are provided on the same tape material, the movable contact and the repulsive mechanism are oriented in the same direction, and waste material from the movable contact is utilized to punch out the reaction spring structure, which is then combined with the movable contact and injection molded as a single unit, thereby reducing the number of parts to be assembled and improving material utilization. Here, because the movable contact and the repulsive mechanism are oriented in the same direction, the repulsive mechanism after punching out the tape material and injection molding is flat, and the spaces on both sides of the injection-molded part (i.e., plastic body 2A) are utilized to bend into the repulsive mechanism with repulsive force. As a result, the present invention has the characteristics of fewer parts, good structural strength, good assembly stability, high material utilization, and low manufacturing costs.

[0069] Example 3 25, the movable contact portion for transmitting a high-frequency signal and the corresponding high-frequency relay according to the present invention differ from Example 2 in that in this example, there is one first sheet member 11A and two second sheets 12A, and in the parallel arrangement, the one first sheet member 11A is located in the middle and the two second sheets 12A are located on either side of the first sheet member 11A, so that the two second sheets 12A and the plastic body 2A form an L-shaped structure. After pressing is completed, the movable contact portion 3A includes one bridge-type movable contactor 4A, two elastic return members 5A, and a plastic body 2A formed by injection-molding the bridge-type movable contactor 4A and the two elastic return members 5A into the entire structure, and the plastic body 2A has two protrusions 21A for fitting into the armature of the relay.

[0070] It should be understood that the present invention is not limited in application to the detailed construction and arrangement of components proposed herein. The present invention may have other embodiments and be realized and carried out in various ways. Such variations and modifications are within the scope of the present invention. The invention disclosed and limited herein extends to all alternative combinations of two or more distinct features mentioned or illustrated in this specification and / or drawings. All these different combinations constitute multiple alternative aspects of the invention. The embodiments described herein explain the most preferred modes known for implementing the invention and enable those skilled in the art to utilize the invention.

Claims

1. A high-frequency relay including a magnetic path portion, a base portion, and a movable contact portion, the magnetic path portion and the movable contact portion being attached to the base portion and interlocking with each other, the base portion includes one upper ground shield piece, one lower ground shield piece, at least two fixed contacts, and a plastic body formed by integrating the one lower ground shield piece and the at least two fixed contacts by injection molding, the fixed contact having a fixed contact exposed portion exposed on the surface of the plastic body, and the fixed contact exposed portion is provided with a contact for contacting a movable spring, the upper surface of the contact being higher in height than the upper surface of the lower ground shield piece, the upper ground shield piece being attached to the plastic body, being higher in height than the upper surface of the contact, and being grounded by the lower ground shield piece, thereby forming a shield space in the base portion that is configured by a gap between the upper ground shield piece and the lower ground shield piece and that can accommodate a bridge-type movable contact in the movable contact portion, The plastic body is provided with a groove, and a plurality of support blocks are further provided in the cover area of ​​the groove of the plastic body corresponding to the lower ground shield piece, and the support blocks are integrally connected to the plastic body, and each of the support blocks covers an area corresponding to the lower ground shield piece, and the upper ground shield piece is hung on the support blocks. A high frequency relay having excellent shielding performance.

2. The exposed portion of the fixed contact is located at the bottom of the groove and is exposed to the bottom surface of the groove of the plastic body, and the upper ground shield piece is attached to the groove of the plastic body.

2. A high frequency relay having excellent shielding performance according to claim 1.

3. The one lower ground shield piece and the at least two fixed contacts are formed by pressing using one tape material, and the lower ground shield piece and the fixed contacts are combined with the plastic body by injection molding so that they are flush with each other, so that the lower ground shield piece and the fixed contacts are complementary in position in the same planar area.

3. A high frequency relay having excellent shielding performance according to claim 1 or 2.

4. The plastic body is a rectangular parallelepiped block, and the peripheral edge of the plastic body has side walls that protrude upward and are surrounded by the side walls to form the groove, and the one lower ground shield piece and the at least two fixed contacts are exposed on the same plane at the bottom of the groove of the plastic body.

4. A high frequency relay having excellent shielding performance according to claim 3.

5. The upper surface of the side wall is higher than the upper surface of the upper ground shield piece.

5. A high frequency relay having excellent shielding performance according to claim 4.

6. The plurality of support blocks include first support blocks respectively positioned at four corners of the groove of the plastic body and second support blocks respectively positioned at two long sides of the rectangular shape of the plastic body. Welding pieces extend from both sides of the lower ground shield piece, and the welding pieces are bent upward to expose the upper surfaces of the welding pieces to the upper surfaces of the second support blocks. The upper ground shield piece is fixed to the welding pieces at the corresponding positions by welding.

6. A high frequency relay having excellent shielding performance according to claim 5.

7. The long side wall of the plastic body corresponding to the rectangular shape further has a notch at a position corresponding to the second support block, the welding piece of the lower ground shield piece extends to the notch, and the height of the upper surface of the welding piece at the notch is the same as the height of the upper surface of the second support block, the upper ground shield piece further has a positioning protrusion extending integrally therewith at a position corresponding to the notch of the plastic body, the positioning protrusion of the upper ground shield piece is positioned in the notch of the plastic body and fixed to the welding piece by welding.

7. A high frequency relay having excellent shielding performance according to claim 6.

8. The one lower ground shield piece and the at least two fixed contacts are respectively provided with ground pins or lead pins extending outward from the side surfaces of the plastic body, and the ground pins of the lower ground shield piece include at least four ground pins distributed at four corners of the rectangle of the plastic body.

5. A high frequency relay having excellent shielding performance according to claim 4.

9. The movable contact portion includes at least one bridge-type movable contactor interlocking with the magnetic path portion and an elastic return member for returning the bridge-type movable contactor, the bridge-type movable contactor being provided in a gap between the upper ground shield piece and the lower ground shield piece, both ends of the bridge-type movable contactor respectively corresponding to contact positions of two of the at least two fixed contacts, and a lower end of the elastic return member abutting against the lower ground shield piece, so that an upper end of the elastic return member presses the bridge-type movable contactor against the upper ground shield piece during return.

5. A high frequency relay having excellent shielding performance according to claim 4.

10. The magnetic path section includes a coil section and an armature section that fit together, the coil section is attached to the plastic body, the armature section is supported by the upper ground shield piece, the upper ground shield piece is integrally connected to the armature section support seat by injection molding, and there are two armature section support seats, each located at the midpoint of two long sides of the upper ground shield piece.

5. A high frequency relay having excellent shielding performance according to claim 4.

11. The at least two fixed contacts include two normally-open end fixed contacts, two common end fixed contacts, and two normally-closed end fixed contacts located on both sides of the rectangular longitudinal direction of the plastic body, the two common end fixed contacts being located in the middle of the long sides of the plastic body, and the two normally-open end fixed contacts and the two normally-closed end fixed contacts being located on both ends of the long sides of the plastic body, respectively; the plurality of support blocks further includes a third support block for isolating the two fixed contacts on both sides of the longitudinal direction; the bridge-type movable contact is provided between the contacts of the normally-closed end fixed contact and the contacts of the common end fixed contact or between the contacts of the normally-open end fixed contact and the contacts of the common end fixed contact, and both ends of the bridge-type movable contact exceed the range of the corresponding two contacts.

7. A high frequency relay having excellent shielding performance according to claim 6.

12. The movable contact portion includes two units fitted to both sides of the armature portion, each unit including two bridge-type movable contacts, one elastic return member, and an injection-molded member formed by injection molding to integrate the two bridge-type movable contacts and the one elastic return member, the elastic return member and the injection-molded member forming a cross-shaped structure, and the third support block also surrounds a corresponding cross-shaped groove so as to move up and down in accordance with the cross-shaped structure formed by the elastic return member and the injection-molded member.

12. A high frequency relay with excellent shielding performance according to claim 11.

13. The coil unit further includes a coil lead pin and a support pin integrally molded with the coil holder by injection molding. The plastic body further includes a slot, the coil lead pin of the coil unit is inserted into the slot of the plastic body, and the support pin of the coil unit is hooked onto the upper ground shield piece and fixed with adhesive. The plastic body further includes an adhesive reservoir groove surrounded by the side wall of the groove, an adhesive separator, and a support block at a position corresponding to where the adhesive between the support pin and the upper ground shield piece is aligned.

11. A high frequency relay having excellent shielding performance according to claim 10.

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