CN212183499U

CN212183499U - Radio frequency switch

Info

Publication number: CN212183499U
Application number: CN202020832581.6U
Authority: CN
Inventors: 杨云超
Original assignee: Kunshan Leijiang Communication Technology Co ltd
Current assignee: Kunshan Leijiang Communication Technology Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-12-18
Anticipated expiration: 2030-05-18

Abstract

A radio frequency switch comprises an insulating base, an insulating upper cover, a movable terminal and a fixed terminal which are clamped between the insulating base and the insulating upper cover, and a metal shell which fixedly holds the insulating base and the insulating upper cover into a whole, the movable terminal comprises a first welding leg arranged on the first longitudinal side of the insulating base, an arched part extending from the first welding leg to the upper part of the surface of the insulating base, and a pair of leaf spring arms extending obliquely downwards from the two transverse sides of the arched part along the longitudinal direction respectively, the static terminal comprises a second welding foot arranged on the second longitudinal side of the insulating base and contact arms which respectively extend to the upper parts of the pair of leaf spring arms from the second welding foot and are contacted with the leaf spring arms, the insulating base is characterized in that a retaining wall is formed by upward protruding the longitudinal second side edge of the insulating base, and the free ends of the plate spring arms are abutted against the inner side of the retaining wall in an initial state. The radio frequency switch is smaller.

Description

Radio frequency switch

Technical Field

The present application relates to the field of electrical connectors, and more particularly, to a radio frequency switch.

Background

With the advent of the intelligent era, in the field of increasingly miniaturized electronic information such as mobile phones, wireless local area network devices and other various devices, the radio frequency switch is used for detecting radio frequency signals of various electronic devices, and the radio frequency switch is required to be further miniaturized, however, in the process of miniaturizing the radio frequency switch, the force arm of an elastic part with the function of the radio frequency switch is reduced, so that the micro radio frequency switch fails in the processes of passing through an IR furnace and detecting plugging and unplugging, and great challenges are provided for miniaturization, and therefore, a more miniaturized and reliable radio frequency switch technical scheme is needed to be provided.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a radio frequency switch that can maintain good elastic contact performance while being miniaturized.

In order to solve the above technical problem, the present application provides a radio frequency switch, comprising an insulating base, an insulating upper cover, a movable terminal and a stationary terminal clamped between the insulating base and the insulating upper cover, and a metal casing for fixing the insulating base and the insulating upper cover into a whole, the movable terminal comprises a first welding leg arranged on the first longitudinal side of the insulating base, an arched part extending from the first welding leg to the upper part of the surface of the insulating base, and a pair of leaf spring arms extending obliquely downwards from the two transverse sides of the arched part along the longitudinal direction respectively, the static terminal comprises a second welding foot arranged on the second longitudinal side of the insulating base and contact arms which respectively extend to the upper parts of the pair of leaf spring arms from the second welding foot and are contacted with the leaf spring arms, the longitudinal second side edge of the insulating base protrudes upwards to form a retaining wall, and the free ends of the plate spring arms are abutted to the inner side of the retaining wall in an initial state.

Preferably, when the arching portion is pressed down and is in an operating state, the pair of leaf spring arms is expanded in a transverse direction.

Preferably, the longitudinal two sides of the insulating base are respectively provided with a first notch and a second notch for assembling a first welding leg of the movable terminal and a second welding leg of the static terminal, the first welding leg is located at the bottom of the first notch, the first welding leg is bent upwards and extends upwards along the first notch to form a first vertical portion, and the arched portion is formed by bending the first vertical portion along the longitudinal direction.

Preferably, concave space has been seted up to second breach one side in the middle of insulating base's the upper surface, insulating base's upper surface is followed first breach orientation the groove of dodging has been seted up to second breach direction, dodge the groove with concave space intercommunication, it is formed with first step face to dodge the upwards protrusion in the horizontal both sides in groove, insulating base surface is in the upwards protrusion in second breach one side is formed with first support column.

Preferably, the movable terminal further includes a first fixing portion extending along two lateral sides of the first leg and overlapping the first step surface, the stationary terminal further includes a second vertical portion bent from one end of the second leg and extending upward along the second gap, and a second fixing portion bent from the second vertical portion in a longitudinal direction and supported on the first support column, and the pair of contact arms extend obliquely upward from two lateral sides of the second fixing portion.

Preferably, the insulating upper cover comprises a cylindrical part provided with a jack, a main body part formed at the bottom of the cylindrical part, a pit formed on the bottom surface of the main body part and corresponding to the avoiding groove, pressing platforms formed on the two transverse sides of the pit and clamping the first fixing part with the first step surface, and a first pressing block formed by protruding downwards from the bottom surface of the main body part, wherein the first pressing block and the first support column clamp the second fixing part together.

Preferably, the avoidance groove is further provided with second step faces on two transverse sides, the second step faces are located on the outer side of the first step faces in the longitudinal direction, the horizontal position of the second step faces is lower than that of the first step faces, the first fixing portion is formed by bending the first welding leg upwards firstly on two transverse sides and then bending the first welding leg longitudinally, and the first fixing portion crosses the second step faces firstly and then is lapped on the first step faces.

Preferably, the insulation base upper surface is lieing in second breach position department still is equipped with the second support column, the second support column is located the vertical outside of first support column, the horizontal plane of second support column is less than the horizontal plane of first support column, the second fixed part pass earlier after the second support column support in first support column upper surface again.

Preferably, the metal shell includes a covering cylinder portion covering the cylindrical portion, a covering plate extending outward from the outer periphery of the bottom of the covering cylinder portion, side covering sidewalls bent downward from both lateral sides of the covering plate and extending, and a clamping wall bent inward from the bottom of the side covering sidewalls and clamped on the bottom surface of the insulating base.

Preferably, the insulating upper cover is integrally injection-molded in the metal shell.

According to the radio frequency switch, the retaining wall is formed by the fact that the end face of one longitudinal side of the insulating base protrudes upwards, the free ends of the pair of plate spring arms of the movable terminal abut against the retaining wall in the initial state, when the arched portion is pressed downwards, the plate spring arms elastically deform downwards, the free ends of the plate spring portions do not need to move along the longitudinal direction but stretch downwards along the transverse opposite directions, a longitudinal moving space does not need to be provided, and the size of a product can be effectively reduced so that the product can be miniaturized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a perspective assembly view of the rf switch of the present application;

FIG. 2 is an exploded perspective view of the RF switch of the present application;

FIG. 3 is an exploded perspective view of an alternative embodiment of the RF switch of the present application;

fig. 4 is a perspective view of the rf switch of the present application with the movable terminal and the stationary terminal mounted on the insulating base and in an initial state;

fig. 5 is a perspective view of the rf switch of the present application with the movable terminal and the stationary terminal mounted on the insulating base and in a pressing state;

fig. 6 is a schematic diagram of the plate spring arm of the movable terminal stretching along the transverse direction X when the rf switch of the present application is in the operating state.

Description of the main component symbols:

metal shell-10; a cover plate-11; a coating barrel part-12; an introduction hole-13; a cladding sidewall-14; a clamping wall-15; an insulating upper cover-20; a main body portion-21; a cylindrical portion-22; a jack-23; a pressing platform-24; first and second compacts-251, 252; a pit-26; an insulating base-30; a bottom plate-31; avoidance slot-313; -a recessed space-314; a first gap-315; a second gap-316; a support table-32; first and second support posts-331, 332; first and second step surfaces-341, 342; a retaining wall-35; a movable terminal-40; a first leg-41; a first vertical portion-42; a raised portion-43; a leaf spring arm-44; a first fixed portion-45; a stationary terminal-50; a second fillet-51; a second upright portion-52; a second fixed portion-53; contact arm-54; probe-S.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments.

In the present application, the X direction shown in fig. 1 is the left-right direction (lateral direction), the Y direction is the front-back direction (longitudinal direction), and the Z direction is the vertical direction.

Referring to fig. 1 to 3, the rf switch of the present application includes an insulating base 30, an insulating upper cover 20, a moving terminal 40 clamped between the insulating base 30 and the insulating upper cover 20, a fixed terminal 50, and a metal housing 10 holding the insulating base 30 and the insulating upper cover 20 together.

The insulating base 30 includes a bottom plate 31 and a plurality of supporting bases 32 formed to protrude upward from the outer side of the bottom plate 31. A first notch 315 and a second notch 316 for assembling the movable terminal 40 and the fixed terminal 50 are respectively opened at two longitudinal ends of the bottom plate 31. An avoiding groove 313 is formed in the middle of the bottom plate 31 on one side of the first notch 315 along the longitudinal direction, and a concave space 314 is formed in the middle of the bottom plate 31 to the second notch 316. First and

second step surfaces

341 and 342 are respectively arranged on two transverse sides of the first gap 315, the first step surface 341 is positioned on the inner side, the second step surface 342 is positioned on the outer side, the horizontal position of the first step surface 341 is higher than that of the second step surface 342, and the horizontal position of the first step surface 341 is higher than that of the concave space 314. The first and

second step surfaces

341 and 342 on both lateral sides are located on both lateral sides of the escape groove 313.

The bottom plate 31 is formed with a first supporting column 331 and a second supporting column 332 protruding upwards inside the second notch 316, the first supporting column 331 is located inside, the second supporting column 332 is located outside, and the horizontal plane of the first supporting column 331 is higher than the horizontal plane of the second supporting column 332. The bottom plate 31 is formed with a retaining wall 35 protruding upward at an end edge of the second notch 316.

The movable terminal 40 includes a first solder leg 41 located at the bottom of the first notch 315, a first vertical portion 42 bent upward from one end of the first solder leg 41 and extending upward along the first notch 315, an arching portion 43 bent horizontally from the first vertical portion 42 and extending toward the second notch 316, and a pair of leaf spring arms 44 formed by branching and extending from two lateral sides of the arching portion 43. The arch 43 extends from above the avoiding groove 313 to the concave space 314, wherein the width of the arch 43 above the concave space 314 is larger than the width of the arch 43 above the avoiding groove 313. A pair of the plate spring arms 44 are formed by extending obliquely from both lateral sides of the free end of the arch portion 43 to the concave space 314, and the free ends of the plate spring arms 44 contact with the concave space 314 and are supported by the retaining wall 35.

The movable terminal 40 further includes a first fixing portion 45 formed by bending upward the two lateral sides of the first leg 41 and then horizontally bending the first leg, and the first fixing portion 45 is located on the first and

second step surfaces

341 and 342, the first fixing portion 45 is located on the two lateral sides of the arching portion 43 and located on the first and

second step surfaces

341 and 342 on the lateral outer side of the avoiding groove 313, the reason why the horizontal position of the second step surface 342 is lower than the horizontal surface of the first step surface 341 is that the bending portion on the outer side of the first fixing portion 45 forms an arc angle, and the arc angle is not flat, and the second step surface 342 is used for avoiding the arc angle on the outer side of the first fixing portion 45.

The fixed terminal 50 includes a second fillet 51 located at the bottom of the second notch 316, a second vertical portion 52 bent upward from the second fillet 51 and extending upward along the second notch 316, a second fixing portion 53 bent from the second vertical portion 52 and extending to the first support column 331, and a pair of contact arms 54 extending obliquely upward from the second fixing portion 53 along the lateral outer side. A pair of contact arms 54 contact and make electrical connection, respectively, over a pair of leaf spring arms 44.

The insulating upper cover 20 includes a main body 21, a cylindrical portion 22 formed to protrude upward from the main body 21, and an insertion hole 23 penetrating the cylindrical portion 22 and the main body 21. A concave pit 26 is formed in the main body portion 21 at a position corresponding to the avoiding groove 313, and a pressing platform 24 for pressing the first fixing portion 45 on the first stepped surface 341 is formed at two lateral sides of the concave pit 26 corresponding to the first and second

stepped surfaces

341, 342 in a downward protruding manner. The main body 21 is formed with a first pressing block 251 and a second pressing block 252 at positions corresponding to the first supporting column 331 and the second supporting column 332.

The metal shell 10 includes a covering cylinder 12 covering the periphery of the cylindrical part 22, a covering plate 11 extending outward from the periphery of the bottom of the covering cylinder 12, side covering sidewalls 14 formed by bending downward from both lateral sides of the covering plate 11, and a clamping wall 15 formed by bending inward from the bottom of the side covering sidewalls 14. The middle of the coating cylinder part 12 is provided with an introduction hole 13 concentric with the insertion hole 23.

The insulating upper cover 20 is integrally injection-molded in the metal housing 10, or the insulating upper cover 20 may be separately injection-molded and then assembled in the metal housing 10.

The assembly method of the radio frequency switch of the application is as follows:

the metal shell 10, the movable terminal 40 and the fixed terminal 50 are formed by punching, the clamping wall 15 of the metal shell 10 is not bent from the bottom of the cladding side wall 14, and the movable terminal 40 and the fixed terminal 50 are both independently connected with a material belt; injection moulding insulating base 30, insulating upper cover 20 (insulating upper cover 20 can be after metal casing 10 stamping forming again with metal casing 10 mould injection moulding). The movable terminal 40 is mounted on the insulating base 30, the first leg 41 and the first vertical portion 42 are located at the position of the first notch 315, the arch portion 43 extends from above the avoiding groove 313 to above the concave space 314, the pair of leaf spring arms 44 extends from above the concave space 314 to contact with the surface of the concave space 314 in an inclined and downward manner, and the free ends of the leaf spring arms 44 abut against the inner side of the retaining wall 35; the pair of first fixing portions 45 is overlapped on the first step surface 341. The stationary terminal 50 is assembled to the insulating base 30, the second solder leg 51 and the second vertical portion 52 are located at the position of the second notch 316, the second fixing portion 53 is supported on the upper surface of the first supporting column 331, and the pair of contact arms 54 are electrically connected to the inner sides of the pair of leaf spring arms 44. The insulating upper cover 20 and the metal shell 10 are then assembled downward on the insulating base 30, the first fixing portion 45 is clamped between the first step surface 341 and the pressing table 24, and the second fixing portion 53 is clamped between the first support column 331 and the pressing block 251. Finally, the bottom of the cladding side wall 14 of the metal shell 10 is bent inward to form a clamping wall 15 clamped on the bottom surface of the insulating base 30 so as to hold the insulating base 30 and the insulating upper cover 20 together.

Referring to fig. 4, fig. 5 and fig. 6, the radio frequency switch of the present application operates according to the following principle:

when the movable terminal 40 is in the non-working state, the arched part 43 and the pair of leaf spring arms 44 arch upwards under the support of the free ends of the leaf spring arms 44, and the pair of contact arms 54 of the fixed terminal 50 are electrically contacted with the inner sides of the pair of leaf spring arms 44; when the probe S shown in the figure is inserted into the insertion hole 23 and then presses the arching portion 43 of the movable terminal 40 downward, the arching portion 43 and the plate spring arm 44 are forced to deform elastically downward, and the plate spring arm 44 is separated from the contact arm 54 and is disconnected, at this time, the free end of the plate spring portion 44 abuts against the inner wall surface of the retaining wall 35, and the pair of plate spring portions 44 are opened along the transverse direction X and cannot move and deform along the longitudinal direction.

This application radio frequency switch is through the upwards protrusion of a vertical side end of insulating base 30 forms barricade 35, move the free end of a pair of leaf spring arm 44 of terminal 40 support when initial condition promptly in barricade 35, pushing down during arch portion 43, when leaf spring arm 44 is elastic deformation downwards, the free end of leaf spring portion 44 need not to remove along longitudinal direction but opens along horizontal opposite direction downwards, need not to provide the longitudinal movement space, can effectively reduce the product size so that it is miniaturized.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A radio frequency switch comprises an insulating base, an insulating upper cover, a movable terminal and a fixed terminal which are clamped between the insulating base and the insulating upper cover, and a metal shell which fixedly holds the insulating base and the insulating upper cover into a whole, the movable terminal comprises a first welding leg arranged on the first longitudinal side of the insulating base, an arched part extending from the first welding leg to the upper part of the surface of the insulating base, and a pair of leaf spring arms extending obliquely downwards from the two transverse sides of the arched part along the longitudinal direction respectively, the static terminal comprises a second welding foot arranged on the second longitudinal side of the insulating base and contact arms which respectively extend to the upper parts of the pair of leaf spring arms from the second welding foot and are contacted with the leaf spring arms, the insulating base is characterized in that a retaining wall is formed by upward protruding the longitudinal second side edge of the insulating base, and the free ends of the plate spring arms are abutted against the inner side of the retaining wall in the initial state.

2. The radio frequency switch of claim 1, wherein the pair of leaf spring arms expand in a lateral direction when the dome is depressed in an operative state.

3. The rf switch of claim 2, wherein the insulating base has a first notch and a second notch on two longitudinal sides thereof for assembling the first solder leg of the movable terminal and the second solder leg of the fixed terminal, the first solder leg is located at the bottom of the first notch, the first solder leg is bent upward and extends upward along the first notch to form a first vertical portion, and the raised portion is formed by bending from the first vertical portion in a longitudinal direction.

4. The RF switch according to claim 3, wherein a concave space is formed in the middle of the upper surface of the insulating base toward the second notch, an avoiding groove is formed in the upper surface of the insulating base along the first notch toward the second notch, the avoiding groove is communicated with the concave space, the avoiding groove protrudes upward at two lateral sides to form a first step surface, and a first supporting pillar protrudes upward at one side of the second notch from the surface of the insulating base.

5. The RF switch of claim 4, wherein the movable terminal further includes a first fixing portion extending along two lateral sides of the first leg and overlapping the first step surface, the stationary terminal further includes a second vertical portion bent from one end of the second leg and extending upward along the second gap, and a second fixing portion bent from the second vertical portion in a longitudinal direction and supported on the first support post, and a pair of the contact arms extend obliquely upward from two lateral sides of the second fixing portion.

6. The RF switch according to claim 5, wherein the insulating upper cover includes a cylindrical portion having a hole, a main body portion formed at a bottom of the cylindrical portion, a recess formed at a bottom surface of the main body portion corresponding to the avoiding groove, pressing blocks formed at both lateral sides of the recess and sandwiching the first fixing portion with the first step surface, and a first pressing block formed to protrude downward from the bottom surface of the main body portion, the first pressing block sandwiching the second fixing portion with the first support pillar.

7. The RF switch according to claim 6, wherein the avoiding groove is further provided with second step surfaces at both lateral sides thereof, the second step surfaces are located at longitudinally outer sides of the first step surfaces, the horizontal position of the second step surfaces is lower than that of the first step surfaces, the first fixing portion is formed by bending the first leg upward from both lateral sides thereof and then bending it in the longitudinal direction, and the first fixing portion passes over the second step surfaces and then overlaps the first step surfaces.

8. The RF switch according to claim 6, wherein a second supporting pillar is further disposed on the upper surface of the insulating base at the second gap, the second supporting pillar is located longitudinally outside the first supporting pillar, a horizontal plane of the second supporting pillar is lower than a horizontal plane of the first supporting pillar, and the second fixing portion passes over the second supporting pillar and then is supported on the upper surface of the first supporting pillar.

9. The RF switch according to claim 6, wherein the metal shell includes a covering cylinder portion covering the cylindrical portion, a covering plate extending outward from the outer periphery of the bottom of the covering cylinder portion, side covering sidewalls bent downward from two lateral sides of the covering plate, and clamping walls bent inward from the bottom of the covering sidewalls and clamped on the bottom surface of the insulating base.

10. The radio frequency switch of claim 9, wherein the insulating top cover is integrally injection molded within the metal housing.