Radio frequency switch and method of mounting the same

Abstract

A radio frequency switch comprises an upper shell, a first insulator integrally injection molded with the upper shell, a second insulator located below the first insulator, and a static terminal and a dynamic terminal clamped between the first insulator and the second insulator, the dynamic terminal upwardly electrically contacts the static terminal and is applied with an elastic force, the first insulator comprises a base, a cylindrical portion upwardly and outwardly extended from the middle of the base, and a jack hole penetrating through the cylindrical portion and the base, a connecting material breaking point is formed on the inner wall surface of the jack hole. The application also comprises a radio frequency switch mounting method.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical connectors, in particular to a radio frequency switch and a mounting method thereof. BACKGROUND

[0002] The radio frequency switch is a component for detecting radio frequency signals in the field of communication, and is used in devices such as mobile phones and wireless local area network devices. In electronic device applications, the size of components is increasingly small. The patent application No. 202010849369.5 filed by the applicant in 2020 discloses a technical solution of separating the upper and lower shells. After assembly, the static terminal is clamped between the first and second insulators, and the contact arm of the static terminal is upwardly abutted on the first insulator. The contact spring arm of the elastic part of the moving terminal is pressed below the contact arm, and the elastic part applies an upward elastic force to the contact arm to ensure electrical contact performance. During the IR furnace (reflow soldering) welding, the first and second insulators are softened, and under the action of the elastic force, the first insulator is upwardly extruded by the contact arm of the static terminal to be warped, so that the elastic force of the elastic part of the moving terminal is weakened or disappears, thereby affecting the contact holding force between the contact spring arm of the moving terminal and the contact arm of the static terminal, and causing poor product quality. SUMMARY

[0003] In view of this, it is necessary to provide a radio frequency switch and a mounting method thereof which can maintain good contact performance between the moving terminal and the static terminal after IR furnace.

[0004] To solve the above technical problems, the present application provides a radio frequency switch, which comprises an upper shell, a first insulator integrally formed with the upper shell by injection molding, a second insulator located below the first insulator, and a static terminal and a moving terminal clamped between the first and second insulators. The moving terminal electrically contacts the static terminal upwardly and applies an elastic force. The first insulator comprises a base, a cylindrical part protruding upwardly from the middle of the base, and a plug hole penetrating through the cylindrical part and the base. A connecting fracture is formed on the inner wall surface of the plug hole.

[0005] Preferably, before the patch is soldered on the printed circuit board, a pressing piece is connected at the connecting fracture to press the moving terminal downwardly. The pressing piece is removed after the radio frequency switch is soldered on the printed circuit board.

[0006] Preferably, the pressing piece comprises a removal end protruding upwardly above the plug hole, a pressing head protruding downwardly and pressing the moving terminal, and a connecting part connecting the outer periphery of the pressing piece and the inner wall surface of the plug hole. The connecting fracture is left after the connection between the connecting part and the inner wall surface of the plug hole is removed.

[0007] Preferably, the connecting material portion is thinned in thickness near one side of the inner wall surface of the insertion hole to form a pre-breaking groove, and the connecting material portion includes at least two portions extending in a radial direction and located on the same straight line.

[0008] Preferably, the outer diameter of the pressing head is smaller than the outer diameter of the pulling portion.

[0009] Preferably, the second insulator includes a base, first and second notches formed on the front and back sides of the base, and a lower through groove formed on the upper surface of the base and communicating with the first and second notches, the bottom surface of the first insulator is provided with an upper through groove corresponding to the lower through groove at the front end, the upper through groove communicates with the insertion hole, and the movable terminal includes a first welding portion, a first vertical arm bent upward from the first welding portion, and a resilient portion bent horizontally from the first vertical arm and extending across the lower through groove, the pressing head downwardly presses the resilient portion to make the resilient portion not apply or reduce the elastic force to the static terminal.

[0010] Preferably, the lower through groove is provided with first and second lower pressing portions near the second notch, the first insulator is provided with first upper pressing portions corresponding to the positions of the first and second lower pressing portions, the static terminal includes a second welding portion located below the second notch, a second vertical arm bent upward from the second welding portion and extending along the second notch, a second clamped portion bent horizontally from the second vertical arm and extending in the direction of the first notch, and a pair of contact arms extending obliquely outward and upward from the lateral sides of the second clamped portion, the second clamped portion is clamped between the first upper pressing portions and the first and second lower pressing portions.

[0011] Preferably, the lower through groove of the second insulator is recessed downward to form a lower recessed space corresponding to the position of the insertion hole, the lower recessed space is provided with a barrier wall with an inclined surface near the side of the second notch, the resilient portion of the movable terminal includes a main resilient arm suspended above the recessed space and a pair of contact resilient arms extending from the lateral sides of the main resilient arm toward the second notch, a spacing space is formed between the pair of contact resilient arms, the contact arm portion of the static terminal is located in the spacing space and in electrical contact with the contact resilient arms, the main resilient arm is located below the insertion hole, and the pressing head of the pressing member downwardly presses the main resilient arm.

[0012] Preferably, the lower through groove comprises a limiting space near the first gap and a passage connecting the limiting space and the lower recessed space, the first and second lower pressing parts are formed at the lower recessed space near the second gap, the movable terminal further comprises a pair of first clamped parts formed by extending laterally from both sides of the elastic part, the free end of the contact spring arm is supported on the stop wall or the inclined surface, and the first clamped parts are limited in the limiting space and clamped by the first and second insulators.

[0013] Preferably, the radio frequency switch further comprises a lower shell formed integrally with the second insulator, the lower shell and the upper shell are fixed together by spot welding, the lower shell comprises a lower flat plate part, a first and a second gap provided at the front and rear ends of the lower flat plate part, and a lower side wall formed by bending upward from the lateral sides of the lower flat plate part, the bottom wall of the lower flat plate part is provided with a thinning part in the front-rear direction, the thinning part is filled with the second insulator, the thinning part comprises a middle thinning part and a thinning end part located on the edges of the first and second gaps, the bottom surface of the lateral sides of the thinning part is lower than the bottom surface of the thinning part, the middle thinning part is provided with a through hole penetrating through the middle thinning part, the through hole connects the thinning part and the upper surface of the lower flat plate part, the bottom wall of the second insulator comprises a filling part filling the thinning part and an outer recess part located on the lateral sides of the filling part and abutting against the surface of the upper flat plate part, the filling part is connected integrally with the second insulator on the surface of the upper flat plate part through the through hole, and the surface of the filling part is flush with the bottom surface of the lower flat plate part.

[0014] To solve the above technical problems, the application further provides a mounting method of a radio frequency switch, comprising the following steps:

[0015] S10, providing a radio frequency switch;

[0016] The radio frequency switch comprises an upper shell, a first insulator integrally formed with the upper shell by injection molding, a second insulator located below the first insulator, a mold cavity formed between the first insulator and the second insulator, and a movable terminal and a static terminal fixed in the mold cavity, a cylindrical part is formed upward in the middle of the first insulator, a plug hole penetrating through the cylindrical part is formed, the movable terminal applies an elastic force upward to the static terminal, and a pressing part integrally formed in the plug hole of the first insulator presses the movable terminal, so that the movable terminal does not apply an elastic force upward to the static terminal.

[0017] S20, after the radio frequency switch is pasted on a printed circuit board, the radio frequency switch is welded in a reflow soldering device;

[0018] S30, after the radio frequency switch is cooled, the pressing part is pulled out of the radio frequency switch.

[0019] Preferably, the pressing piece comprises a pulling end protruding upward above the insertion hole, a pressing head protruding downward and pressing the movable terminal, and a connecting part connecting the outer periphery of the pressing piece and the inner wall surface of the insertion hole, a pre-breaking groove being formed in the connecting part near the inner wall surface of the insertion hole by thinning the thickness of the connecting part, the connecting part comprising at least two parts extending in the radial direction and being in the same straight line.

[0020] The radio frequency switch and the mounting method thereof of the present application integrally form the pressing piece pressing the movable terminal in the insertion hole of the first insulator, so that the elastic force of the movable terminal does not further increase the deformation of the first insulator in the high-temperature welding environment of the radio frequency switch, thereby affecting the contact performance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective assembly view of the radio frequency switch of the present application;

[0022] Figure 2 It is a perspective assembly view of the radio frequency switch of the present application; Figure 1 It is a perspective assembly view from another direction;

[0023] Figure 3 It is a perspective exploded view of the radio frequency switch of the present application;

[0024] Figure 4 It is a perspective exploded view of the radio frequency switch of the present application; Figure 3 It is a perspective exploded view from another direction;

[0025] Figure 5 It is a perspective view of the movable terminal and the fixed terminal of the radio frequency switch of the present application in the cooperating state;

[0026] Figure 6 It is a perspective assembly view of the first insulator and the upper shell of the radio frequency switch of the present application;

[0027] Figure 7 It is a perspective view of the movable terminal and the fixed terminal of the radio frequency switch of the present application in the cooperating state;

[0028] Figure 8 It is a perspective view of the second insulator of the radio frequency switch of the present application;

[0029] Figure 9 It is a sectional view along the A-A line shown in the figure; Figure 1

[0030] It is a sectional view along the B-B line shown in the figure. Figure 10 Figure 1

[0031] ​​The meanings of the reference signs in the drawings are as follows: RF switch - 100, metal shell - 10, upper shell - 11, upper flat plate part - 111, docking cylinder part - 112, accommodation space - 113, upper side wall - 114, upper side edge wall - 115, spacing space - 116; lower shell - 12, lower flat plate part - 121, first accommodation slot - 122, thinning part - 123, thinned middle part - 1231; thinned end part - 1232; second accommodation slot - 124, through hole - 125, lower side wall - 126, lower side edge wall - 127, notched part - 128, protruding part - 129, welding slot - 13; insulating body - 20, first insulator - 21, base - 211, cylindrical part - 212, insertion hole - 213, upper through slot - 214, first upper pressing part - 215, upper pressing glue filling part - 216, second upper pressing part - 217; second insulator - 22, base part - 221, first notch - 222, second notch - 223, lower through slot - 224, lower recessed space - 225, blocking wall - 226, inclined surface - 227, first lower pressing part - 228, second lower pressing part - 229, lower protruding block - 23, 24, limiting space - 25, support table - 251, inclined avoiding surface - 252, channel - 26, outer edge part - 27, bottom wall - 28, filling part - 281, outer side recessed part - 282, bonding block - 29; conductive terminal - 30, movable terminal - 31, first welding part - 311, first vertical arm - 312, elastic part - 313, main elastic arm - 314, contact elastic arm - 315, support end - 3151, thinned part - 3152, first clamped part - 316, connecting arm - 317, clamped foot - 318; static terminal - 32, second welding part - 321, second vertical arm - 322, second clamped part - 323, contact arm - 324, crease part - 325; pressing piece - 40; pulling end - 41; pressing head part - 42; continuous material part - 43; pre-breaking groove - 431. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present application, a more comprehensive description of the present application will be given below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be a mediating element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or a mediating element can be present at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0035] The present application is based on Figure 1 The X direction is the left-right direction (lateral direction), the Y direction is the front-rear direction (longitudinal direction), and the Z direction is the vertical direction. In particular, in Figure 1 the moving terminal 31 is located in front of the radio frequency switch 100 in the front-rear direction.

[0036] Referring to Figures 1 to 4 The radio frequency switch 100 includes a metal shell 10, an insulating body 20 held in the metal shell 10, and a conductive terminal 30 held in the insulating body 20.

[0037] The metal shell 10 includes an upper shell 11 and a lower shell 12 that are coupled together. The upper shell 11 includes an upper flat plate portion 111 arranged flat, a mating cylinder portion 112 formed by protruding upward at a central position of the upper flat plate portion 111, and an upper side wall 114 formed by bending downward and extending vertically from a side edge of the upper flat plate portion 111. The mating cylinder portion 112 can be used for plug-in fitting with a housing of a mating connector (not shown), and the central position of the mating cylinder portion 112 is provided with a receiving space 113 that penetrates the upper shell 11 vertically. The upper side wall 114 includes two upper side edge walls 115, a total of four, arranged in pairs and spaced apart at left and right side edges of the upper flat plate portion 111 in the lateral direction. An interval space 116 is formed between two upper side edge walls 115 on the same side.

[0038] The lower shell 12 includes a lower flat plate portion 121, first and second displacement grooves 122 and 124 disposed on the front and rear sides of the lower flat plate portion 121 and extending toward each other, and a lower side wall 126 formed by bending upward from the lateral side edges of the lower flat plate portion 121 and extending vertically. The outer surface of the lower side wall 126 is disposed in correspondence with the inner surface of the upper side wall 114. The lower side wall 126 includes two lower side edge walls 127 disposed on the left and right sides of the lower flat plate portion 121 in the lateral direction, respectively, and a total of four lower side edge walls 127. Between the two lower side edge walls 127 on the same side, a protruding portion 129 extending outward from the lateral sides of the lower flat plate portion 121 is disposed, which corresponds to the spacing space 116. The protruding portion 129 is disposed to optimize the process design, and functions to connect the material belt. The protruding portion 129 extends beyond the lower side edge wall 127 in the lateral direction. A notch portion 128 is formed between a pair of lower side edge walls 127 on the upper side of the protruding portion 129. A thinned portion 123 is formed by pressing the bottom of the flat plate portion 121 upward and thinning the middle portion, which extends in the front-rear direction and includes a thinned middle portion 1231 in the middle portion and thinned end portions 1232 around the outer edge portions of the first and second displacement grooves 122 and 124. The thinned end portions 1232 provide thinned portions on the longitudinal inner side and the lateral sides of the first and second displacement grooves 122 and 124 to facilitate the holding of the insulating body 20 and the lower shell 12. A through hole 125 is formed through the thinned middle portion 1231 in the up-down direction to facilitate the flow of plastic in the up-down direction. The protruding portion 129 is torn from the middle portion of the lower side wall 126, and the front and rear end portions of the lower side wall 126 are bent upward. The protruding portion 129 is integral with the lower flat plate portion 121 and flush with the bottom surface, and forms the notch portion 128.

[0039] The upper shell 11 and the lower shell 12 can be made by metal stamping process or metal powder metallurgy process.

[0040] Please refer to Figures 1 to 10 As shown, the insulating body 20 includes a first insulating body 21 formed integrally with the upper shell 11 and a second insulating body 22 disposed below the first insulating body 21 and formed integrally with the lower shell 12.

[0041] The first insulator 21 comprises a base 211 and a cylindrical portion 212 protruding upwardly from the center of the base 211. The cylindrical portion 212 is provided with a hole 213 extending through the first insulator 21. The lower surface of the base 211 is provided with an upper through slot 214 on one side in the front-rear direction and a first upper pressing portion 215 protruding downwardly on the other side. The first upper pressing portion 215 is further provided with an upper pressing glue portion 216 protruding downwardly from the end of the hole 213. The upper through slot 214 is provided with second upper pressing portions 217 protruding downwardly on both sides in the lateral direction. The upper through slot 214 is in communication with the hole 213. The first insulator 21 is integrally injection molded with the upper shell 11. The bottom surface of the upper pressing glue portion 216 is lower than the bottom surface of the first upper pressing portion 215.

[0042] The second insulator 22 comprises a flat base 221, a first notch 222 on the front side of the base 221, and a second notch 223 on the opposite rear side. The upper surface of the base 221 is provided with a lower through slot 224 and a lower recessed space 225 recessed downwardly in the front-rear direction. The lower through slot 224 is adjacent to the first notch 222 and in communication with the first notch 222. The lower recessed space 225 is adjacent to the second notch 223 and in communication with the second notch 223. The upper surface of the base 221 is provided with a pair of barrier walls 226 with inclined surfaces 227 on both sides of the second notch 223. The inclined surfaces 227 of the barrier walls 226 are connected to the lower surface of the lower recessed space 225. The lower surface of the lower recessed space 225 is lower than the upper surface of the base 221 (including the barrier walls 226). The lower recessed space 225 is provided with a first lower pressing portion 228 and a second lower pressing portion 229 spaced apart in the front-rear direction adjacent to the second notch 223. The lower through slot 224 comprises a limiting space 25 adjacent to the first notch 222 and forming a space, and a passage 26 connecting the limiting space 25 and the lower recessed space 225. The lateral edges of the base 221 are respectively provided with two pairs of lower protrusions 23, 24 protruding upwardly and spaced apart. The limiting space 25 is limited in the front-rear direction by the two pairs of lower protrusions 23, 24. The front end of the limiting space 25 is provided with a support surface 251, and the rear surface of the support surface 251 gradually descends to the bottom surface of the lower recessed space 225 and is provided with an avoidance inclined surface 252. The avoidance inclined surface 252 connects the support surface 251 and the lower recessed space 225 through the passage 26.

[0043] The second insulator 22 further comprises outer edge portions 27 formed on both sides of the base portion 221 in the lateral direction. The outer edge portions 27 are formed with a coupling block 29 protruding in the lateral direction from the middle of the outer edge portions 27, and the protruding length of the coupling block 29 is consistent with the protruding portion 129 of the lower housing 12. The top surface of the barrier wall 226 is a horizontal surface, and the inclined surface 227 is formed extending downward from the top surface of the barrier wall 226. The bottom wall 28 of the second insulator 22 is formed with a filling portion 281 filling the bottom side of the thinned portion 123 and an outer recessed portion 282 located on both sides of the filling portion 281 and covered by the lower flat plate portion 121 of the lower housing 12. The through hole 125 is filled by the second insulator 22 and communicates the filling portion 281 with the plastic on the upper side of the lower housing 12. The filling portion 281 is flush with the bottom surface of the base portion 221 and is attached to an object. The cooperation of the thinned portion 123 and the filling portion 281 can make the coupling of the second insulator 22 and the lower housing 12 more secure.

[0044] The conductive terminal 30 comprises a static terminal 32 and a dynamic terminal 31 elastically contacting the static terminal 32. The dynamic terminal 31 comprises a first welding portion 311 arranged flatly, a first vertical arm 312 formed extending upward from the first welding portion 311, an elastic portion 313 formed extending in the front-back direction from the first vertical arm 312, and a pair of first clamped portions 316 arranged laterally from both sides of the connection position of the first vertical arm 312 and the elastic portion 313. The elastic portion 313 comprises a main elastic arm 314 connected with the first vertical arm 312 and a pair of contact elastic arms 315 formed extending from both sides of the other end of the main elastic arm 314 away from the first vertical arm 312. The pair of contact elastic arms 315 are formed extending backward from both sides of the main elastic arm 314 respectively and form a spacing space between the pair of contact elastic arms 315, and the contact area contacting the static terminal 32 is formed on the inner side upper edge of the spacing space. The free end of the pair of contact elastic arms 315 forms a support end 3151 supported on the upper surface or inclined surface 227 of the barrier wall 226, the end of the support end 3151 is thinned to form a beveled portion 3152, the thickness of the beveled portion 3152 is smaller than the thickness of the contact elastic arm 315, and the thickness of the beveled portion 3152 gradually thins toward the free end direction. The pair of first clamped portions 316 comprises a connection arm 317 connected to the first vertical arm 312 or the main elastic arm 314 and a clamped leg 318 formed extending backward in the front-back direction from the connection arm 317. The pair of first clamped portions 316 sinks into the limiting space 25 of the second insulator 22, and the upper surface of the first clamped portion 316 exceeds the upper surface of the lower protruding block 23, 24 upward, and the front-back position of the first clamped portion 316 is limited by the lower protruding block 23, 24.

[0045] The static terminal 32 includes a second welding portion 321 arranged flat, a second vertical arm 322 formed by bending upward from the second welding portion 321, a second clamped portion 323 extending in the front-rear direction from the second vertical arm 322, and a pair of contact arms 324 extending obliquely upward from both sides of the second clamped portion 323. The pair of contact arms 324 are bent obliquely from both sides of the second clamped portion 323 transversely and form a crease portion 325, the crease portion 325 is at an angle with the front-rear direction so that the pair of contact arms 324 open outward, and the extension direction of the pair of crease portions 325 is at an angle so that the front side of the contact arm 324 is closer to the transverse outer side. In this way, when the pair of contact arms 324 overlap the pair of contact springs 315, the contact arm 324 only contacts the contact spring 315 at a single point on the front end outer side, ensuring stable switch performance.

[0046] For reference Figure 1 , Figures 8 to 10 To solve the problem that the static terminal 32 is easily deformed by being pressed upward by the first insulator 21 due to the upward elastic force of the moving terminal 31 when the radio frequency switch 100 passes through the IR furnace, when the first insulator 21 is formed on the upper housing 11, a pressing piece 40 is formed in the insertion hole 213 to press the elastic portion 313 of the moving terminal 31, so as to prevent the elastic portion 313 from applying upward force to the static terminal when passing through the IR furnace. The pressing piece 40 includes a pulling end 41 that protrudes upward beyond the insertion hole 213, a pressing head 42 formed at the bottom of the pressing piece 40 and used to press the moving terminal 31, and a connecting portion 43 connecting the pressing piece 40 to the inner wall of the insertion hole 213. The pressing head 42 enters the upper through slot 214 downward and presses the main spring arm 314 of the moving terminal 31 downward so that the elastic portion 313 does not apply upward force to the static terminal 32. The connecting portion 43 is provided in the radial direction, and the pair of connecting portions 43 are on the same straight line. The connecting portion 43 is thinned near the inner wall of the insertion hole 213 to form a pre-breakage groove 431, and the pre-breakage groove 431 is provided on the upper side; in an embodiment, the pre-breakage groove 431 can also be provided on the lower side or on both upper and lower sides. In order to make the pressing head 42 only press the main spring arm 314, the outer diameter of the pressing head 42 is smaller than the outer diameter of the pulling end 41.

[0047] After the radio frequency switch 100 passes through the IR furnace and is welded and cooled, the pulling end 41 pulls and breaks the pressing piece 40, and leaves a connecting portion breakage (not numbered) on the inner wall of the insertion hole 213.

[0048] In the production and assembly process of the radio frequency switch 100, first, the upper shell 11, the lower shell 12, the moving terminal 31 and the static terminal 32 are made by metal stamping process.

[0049] Then, the upper shell 11 is in-mold injection formed with the first insulator 21 to form an upper mold group. The upper surface of the base body 211 of the first insulator 21 is attached to the upper flat plate part 111 of the upper shell 11, and the cylindrical part 212 is held in the receiving space 113 of the butt joint cylindrical part 112.

[0050] The second insulator 22 is in-mold injection formed with the second insulator 22 to form a lower mold group. The bottom surface of the filling part 281 of the bottom wall 28 of the second insulator 22 is flush with the bottom surface of the lower flat plate part 121. The upper surface of the lower shell 12 is covered by the second insulator 22. The first allowance slot 122 is correspondingly matched with the first notch 222, and the second allowance slot 124 is correspondingly matched with the second notch 223. The lateral outer surface of the outer edge part 27 is attached to the inner surface of the lower side wall 126. The combination block 29 of the outer edge part 27 extends and is held in the notch part 128, and the combination block 29 is supported by the protruding part 129 to make the holding between the front and rear outer edges of the second insulator 22 and the lower shell 12 more firm.

[0051] Then, the moving terminal 31 and the static terminal 32 are assembled between the upper mold group and the lower mold group, and a pair of contact arms 315 of the moving terminal 31 elastically contact a pair of contact arms 324 of the static terminal 32 from bottom to top. Then, the upper mold group and the lower mold group are assembled together in the up-down direction. The upper through slot 214, the lower through slot 224, the insertion hole 213 and the lower recessed space 225 form a communication space.

[0052] At this time, the static terminal 32 is held between the upper and lower mold sets at a rear position. The second welding portion 321 and the second vertical arm 322 of the static terminal 32 are located in the second gap 223. The first upper pressing portion 215 corresponds to the first and second lower pressing portions 228 and 229 in the up-down direction and clamps the second clamped portion 323. The lower pressing glue portion 216 is in interference pressure connection with the second clamped portion 323, so that sufficient clamping force can be provided to the second clamped portion 323 even when the plastic is deformed in the IR furnace, thereby preventing the second clamped portion 323 from being raised upward to cause poor contact. A pair of contact arms 324 are suspended above the lower concave space 225. The dynamic terminal 31 is held between the upper and lower mold sets at a front position. The first welding portion 311 and the first vertical arm 312 of the dynamic terminal 31 are located in the first gap 222. The elastic portion 313 extends from the first vertical arm 312, passes through the limiting space 25 and the channel 26, and extends into the lower concave space 225. A pair of second upper pressing portions 217 correspond to the bottom surface of the limiting space 25 in the up-down direction and clamp a pair of clamped feet 318 to fix the dynamic terminal 31. The front end of the elastic portion 313 is supported on the support table 251, so that the front end of the elastic portion 313 becomes the first fixed point of the elastic arm 313. The elastic portion 313 is in elastic contact with a point on the lateral outer side surface of the contact arm 324 in the form of single-point contact. The pressing head 42 of the pressing member 40 presses the main elastic arm 314 of the dynamic terminal 31 downward, so that the dynamic terminal 31 does not exert force on the static terminal 32.

[0053] The outer surface of the lower side wall 127 of the lower shell 12 is in contact with the inner surface of the upper side wall 115 of the upper shell 11. The lower surface of the upper side wall 114 is higher than the lower surface of the lower plate portion 121. The position between the lower edge of the upper side wall 115 and the outer surface of the lower side wall 127 forms a welding groove 13. The welding groove 13 is higher than the lower surface of the lower plate portion 121 in the up-down direction.

[0054] Finally, a welding process is used to weld at the welding groove 13, so that the upper shell 11 and the lower shell 12 are stably held together. In some embodiments, laser spot welding is preferably used in the welding process. The welding points formed after welding can be spaced points or strips, which are within the protection scope of the present application.

[0055] The present application also provides a mounting method of a radio frequency switch, comprising the following steps:

[0056] S10, providing a radio frequency switch 100;

[0057] The radio frequency switch 100 in the step comprises an upper shell 11, a first insulator 21 integrally injection molded with the upper shell 11, a lower shell 12, a second insulator 22 integrally injection molded with the lower shell 12, a cavity formed between the first insulator 21 and the second insulator 22, and a moving terminal 31 and a static terminal 32 fixed in the cavity. A cylindrical portion 112 is formed in the middle of the first insulator 21 and protrudes upward, a hole 213 is formed in the cylindrical portion 112 and communicates with the cavity, and the moving terminal 31 applies an elastic force upward to the static terminal 32. The hole 213 of the first insulator 21 integrally forms a pressing piece 40 that presses the moving terminal 31, so that the moving terminal 31 does not apply an elastic force upward to the static terminal 32.

[0058] S20, the radio frequency switch 100 patch enters the reflow soldering equipment and is welded at high temperature;

[0059] In the step, the pressing piece 40 of the radio frequency switch 100 always presses the elastic force of the moving terminal 31 downward, so as to avoid that the elastic force of the moving terminal 31 causes the static terminal 32 to move upward.

[0060] S30, the pressing piece 40 on the radio frequency switch 100 is pulled out.

[0061] In the step, the first insulator 21 and the second insulator 22 need to be cooled and then the hardness is restored. When the pressing piece 40 is pulled out, the connecting portion 43 of the pressing piece 40 is broken at the inner wall of the hole 213.

[0062] The radio frequency switch and the mounting method thereof integrally form the pressing piece 40 that presses the moving terminal 31 in the hole 213 of the first insulator 21, so that the elastic force of the moving terminal 31 does not further cause the first insulator 21 to deform in the high-temperature welding environment of the radio frequency switch, and then affects the contact performance.

[0063] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0064] The above embodiments only express the preferred embodiments of the application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A radio frequency switch comprising an upper housing, a first insulator integrally injection-molded with the upper housing, a second insulator positioned below the first insulator, and a static terminal and a dynamic terminal clamped between the first and second insulators, the dynamic terminal electrically contacting the static terminal upward and exerting an elastic force, the first insulator comprising a base, a cylindrical portion extending upward from the center of the base, and a jack extending vertically through the cylindrical portion and the base, characterized in that: A connecting fracture is formed on the inner wall surface of the insertion hole; Before the radio frequency switch is soldered on the printed circuit board, a pressing piece for pressing the movable terminal downward is connected to the connecting material break, and the pressing piece is removed after the radio frequency switch is soldered on the printed circuit board.

2. The radio frequency switch according to claim 1, wherein: The pressed part includes a removal end protruding upward from above the socket, a pressing head protruding downward and pressing the movable terminal, and a connecting part connecting the outer periphery of the pressed part and the inner wall surface of the socket. The connecting fracture is left after the connection between the connecting part and the inner wall surface of the socket is removed.

3. The radio frequency switch according to claim 2, wherein: The thickness of the connecting portion close to the inner wall surface of the insertion hole is thinned to form a pre-broken groove. The connecting portion includes at least two connecting portions extending in the radial direction, and the two connecting portions are on the same straight line.

4. The radio frequency switch according to claim 2, wherein: The outer diameter of the pressing head is smaller than the outer diameter of the plucking end.

5. The radio frequency switch according to claim 2, wherein: The second insulator includes a base, a first notch and a second notch provided on the front and rear sides of the base, and a lower through-slot provided on the upper surface of the base and connecting the first notch and the second notch. An upper through-slot is provided at the front end of the bottom surface of the first insulator corresponding to the lower through-slot, and the upper through-slot is connected to the jack. The movable terminal includes a first welding portion, a first vertical arm bent upward from the first welding portion, and an elastic portion bent horizontally from the first vertical arm and extending across the lower through-slot. The pressing head presses the elastic portion downward so that the elastic portion does not apply or reduces the elastic force applied to the static terminal.

6. The radio frequency switch according to claim 5, wherein: The lower through groove is provided with a first pressing portion and a second pressing portion at a position close to the second notch, and the first insulator is provided with a first pressing portion at a position corresponding to the first pressing portion and the second pressing portion. The static terminal includes a second welding portion located below the second notch, a second vertical arm bent upward from the second welding portion and extending along the second notch, a second clamped portion formed by horizontally bending from the second vertical arm and extending toward the first notch, and a pair of contact arms formed by extending obliquely outward and upward from both sides of the second clamped portion, and the second clamped portion is clamped between the first pressing portion and the first and second pressing portions.

7. The radio frequency switch according to claim 6, wherein: The lower through groove of the second insulator is recessed downward at a position corresponding to the insertion hole to form a recessed space, and a retaining wall with an inclined surface is provided on a side of the recessed space close to the second notch. The elastic portion of the movable terminal includes a main elastic arm suspended above the recessed space and a pair of contact elastic arms extending from both sides of the main elastic arm toward the second notch, a spacing space is formed between the pair of contact elastic arms, the contact arm portion of the static terminal is located in the spacing space and is in electrical contact with the contact elastic arm, the main elastic arm is correspondingly located below the insertion hole, and the pressing head of the pressing piece presses the main elastic arm downward.

8. The radio frequency switch according to claim 7, wherein: The lower through groove includes a limiting space near the first notch and a channel connecting the limiting space and the concave space. The first and second pressing portions are formed in the concave space near the second notch. The movable terminal also includes a pair of first clamped portions extending laterally from both sides of the elastic portion. The free end of the contact elastic arm is supported on the retaining wall or the inclined surface. The first clamped portion is limited in the limiting space and clamped by the first and second insulators.

9. The radio frequency switch according to claim 8, wherein: The RF switch also includes a lower shell formed integrally with the second insulator, the lower shell and the upper shell being fixed together by spot welding, the lower shell including a lower flat portion, a first and a second makeshift groove provided at the front and rear ends of the lower flat portion, and a lower side wall formed by bending upward from the lateral sides of the lower flat portion, the bottom surface of the bottom wall of the lower flat portion is provided with a thinning portion along the front-to-back direction, the thinning portion is filled with the second insulator, the thinning portion includes a middle thinning portion and thinning end portions located on the edges of the first and second makeshift grooves, the bottom surfaces of the thinning portion on both lateral sides are lower than the bottom surfaces of the thinning portion, a through-hole is formed through the middle of the thinning portion, the through-hole connects the thinning portion with the upper surface of the lower flat portion, the bottom wall of the second insulator includes a filling portion filling the thinning portion and an outer recess located on the lateral outer side of the filling portion and affixed to the surface of the lower flat portion, the filling portion is connected to the second insulator on the surface of the lower flat portion through the through-hole, and the surface of the filling portion is flush with the bottom surface of the lower flat portion.

10. A method for installing a radio frequency switch, characterized in that: The steps include: S10, providing a radio frequency switch; The RF switch includes an upper shell, a first insulator integrally formed by injection molding with the upper shell, a second insulator located below the first insulator, a cavity formed between the first and second insulators, and a movable terminal and a static terminal fixed in the cavity. The first insulator has a cylindrical portion protruding upward in the middle, and the cylindrical portion is penetrated from top to bottom to form a socket connected to the cavity. The movable terminal applies an upward elastic force to the static terminal. A pressing piece for pressing the movable terminal is integrally formed in the socket of the first insulator, so that the movable terminal does not apply an upward elastic force to the static terminal. S20, placing the radio frequency switch patch on a printed circuit board and then soldering it in a reflow soldering device; S30: After the radio frequency switch cools down, the pressed part is removed from the radio frequency switch.

11. The radio frequency switch installation method according to claim 10, wherein: The pressing part includes a removal end protruding upward from the top of the socket, a pressing head protruding downward and pressing the movable terminal, and a connecting part connecting the outer periphery of the pressing part and the inner wall of the socket. The thickness of the connecting part close to the inner wall of the socket is thinned to form a pre-breaking groove. The connecting part includes at least two parts extending in the radial direction, and the two connecting parts are on the same straight line.

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