RF switch

Abstract

The present invention provides a radio frequency switch, which includes a first insulator and a second insulator that cooperate in the up-down direction, a static terminal, a moving terminal that are clamped between the first insulator and the second insulator, and an upper housing and a lower housing that are respectively fixed outside the first insulator and the second insulator and are fixedly connected to each other. The second insulator includes a base portion and a first notch and a second notch that are opened in the middle of the front and rear ends of the base portion. The moving terminal and the static terminal respectively include a first vertical arm and a second vertical arm located in the first notch and the second notch, and a first welding portion and a second welding portion that are horizontally bent from the bottoms of the first vertical arm and the second vertical arm. The first notch and the second notch respectively form sol tanks, and glue is injected into the sol tanks to wrap the outer circumferences of the first vertical arm and the second vertical arm to form glue blocks; the present application can effectively prevent solder climbing during welding.

Description

Technical Field

[0001] The present invention relates to the field of electrical connectors, and particularly to a radio frequency switch. Background Art

[0002] With the advent of the intelligent era, in today's increasingly miniaturized electronic information fields such as mobile phones, wireless local area network devices and other devices, radio frequency switches are used to detect the radio frequency signals of various electronic devices. Refer to Chinese Patent No. 200980100028.X, which includes an external terminal, an upper shell, a lower shell, fixed terminals and movable terminals that are separated up and down and elastically contact the fixed terminals. The external terminal has a foot portion with a lower end bent to clamp the bottom surface of the lower shell.

[0003] Due to the development of electronic devices, radio frequency switches are also required to be further miniaturized. However, during the miniaturization process of radio frequency switches, the lever arm of the elastic parts of the radio frequency switch function will be reduced. In the prior art, the riveted foot structure is difficult to manufacture, and the fixing strength between components is weak, resulting in the failure of the miniaturized radio frequency switch during the IR furnace process and the detection of plugging and unplugging, posing a great challenge to miniaturization. For example, the patent application No. 202010849369.5 submitted by the applicant reveals a separation design of the upper and lower bottom shells to solve the defect that it is difficult to ensure flatness in the process when a single metal shell is riveted for a micro-miniature radio frequency switch. At the same time, the patent No. 202010849369.5 also has the following defects: during the soldering process of the solder feet of the conductive terminals, there is a problem of upward solder climbing, resulting in short circuits or affecting the elasticity of the movable terminals; the first insulator and the second insulator are integrally injection-molded with the upper shell and the lower shell respectively, resulting in insufficient bonding force. And when the second insulator passes through the IR furnace, due to the insufficient tight combination between the second insulator and the lower shell, it is easy to produce warping deformation when heated; during the downward pressing process of the movable terminal, there is no limiting structure, and sufficient clamping force needs to be provided between the first and second insulators to the movable terminal, resulting in an increase in the internal stress of the plastic and increasing the instability of the product. Summary of the Invention

[0004] In view of this, it is necessary to provide a radio frequency switch in which the upper part of the welding part of the conductive terminal is wrapped with glue to prevent solder climbing during welding.

[0005] To solve the above technical problems, the present application provides a radio frequency switch, which includes a first insulator and a second insulator that cooperate in the up-down direction, a static terminal, a moving terminal clamped between the first insulator and the second insulator, and an upper housing and a lower housing that are respectively fixed outside the first insulator and the second insulator and are fixedly connected to each other. The second insulator includes a base portion, a first notch and a second notch formed in the middle of the front and rear ends of the base portion. The moving terminal and the static terminal respectively include a first vertical arm and a second vertical arm located in the first notch and the second notch, and a first welding portion and a second welding portion horizontally bent from the bottoms of the first vertical arm and the second vertical arm. The first notch and the second notch respectively form glue injection grooves, and glue is injected into the glue injection grooves to wrap the outer peripheries of the first vertical arm and the second vertical arm to form glue blocks.

[0006] Preferably, when the radio frequency switch is inverted, glue is injected into the first notch and the second notch from top to bottom. Step portions with openings facing downwards are formed on the inner peripheries of the first notch and the second notch, so that the openings at the bottoms of the glue injection grooves are larger than the openings on the upper sides. The step portions are inclined plane structures.

[0007] Preferably, first through holes and second through holes are respectively formed through the first vertical arm and the second vertical arm in the front-rear direction, and glue overflows to the front and rear sides of the first vertical arm and the second vertical arm through the first through holes and the second through holes, so that the glue wraps around the first vertical arm and the second vertical arm on all sides.

[0008] Preferably, the first insulator includes a base body, a jack vertically penetrating the base body, and a first glue limiting portion and a second glue limiting portion protruding downward from the front and rear side edges of the base body. The first glue limiting portion and the second glue limiting portion extend downward to the outside of the first vertical arm and the second vertical arm and at least partially enclose the glue injection grooves in the longitudinal direction. When the glue overflows to the front and rear outer sides of the glue injection grooves through the first through holes and the second through holes, the glue adheres to the lower surfaces of the first glue limiting portion and the second glue limiting portion.

[0009] Preferably, the upper housing includes an upper flat portion, a docking cylinder portion protruding upward at the center position of the upper flat portion, and an upper side wall formed by bending downward and vertically extending from the side edge of the upper flat portion. The lower housing includes a flat lower flat portion and a lower side wall formed by bending upward and vertically extending from the side edge of the lower flat portion. The inner surface of the upper side wall is attached to the outer surface of the lower side wall. A welding groove is formed between the lower edge of the upper side wall and the outer surface of the lower side wall, so that the upper housing and the lower housing are welded and fixed at the welding groove.

[0010] Preferably, the first insulator is integrally injection-molded with the upper housing, and the second insulator is integrally injection-molded with the lower housing. A lower through groove and a lower concave space are formed by downward depression on the upper surface of the base of the second insulator. The lower through groove is close to the first notch and communicates with the first notch. The lower concave space is close to the second notch and communicates with the second notch. A pair of retaining walls with inclined surfaces are provided at positions on the left and right sides of the second notch on the upper surface of the base. A first downward pressing portion and a second downward pressing portion are arranged at intervals in the front-rear direction on the side close to the second notch in the lower concave space.

[0011] Preferably, the first insulator further includes a cylindrical portion that protrudes upward at the central position of the base body. The jack penetrates downward through the cylindrical portion and the base body. An upper through groove is formed on the lower surface of the base body corresponding to the lower through groove. First upward pressing portions and second upward pressing portions are formed by downward protrusion on the lower surface of the base body corresponding to the first downward pressing portion and the second downward pressing portion. Third upward pressing portions protrude downward from both lateral sides of the upper through groove.

[0012] Preferably, the moving terminal further includes an elastic portion formed by bending from the first vertical arm and extending in the front-rear direction toward the static terminal, and a pair of first clamped portions laterally arranged on both sides of the connection position between the first vertical arm and the elastic portion. The pair of first clamped portions includes a connecting arm connected to the connection position between the first vertical arm and the elastic portion and a clamped leg extending backward in the front-rear direction from the connecting arm. The elastic portion includes a main elastic arm suspended above the lower through groove and a pair of contact elastic arms extending from both lateral sides of the main elastic arm toward the second notch. The static terminal further includes a second clamped portion horizontally bent and extended from the second vertical arm toward the moving terminal and a pair of contact arms obliquely extended from both lateral sides of the second clamped portion. The first clamped portion of the moving terminal is clamped between the second insulator and the third upward pressing portion. The second clamped portion of the static terminal is clamped between the first and second downward pressing portions of the second insulator and the first and second upward pressing portions of the first insulator.

[0013] Preferably, the free ends of the pair of contact elastic arms of the moving terminal form supporting ends supported on the upper surface or the inclined surface of the retaining wall. The supporting ends are thinned toward the rear to form thinned portions. The second clamped portion of the static terminal is located between the pair of contact elastic arms. A crease portion is formed between the pair of contact arms from the second clamped portion. The crease portion opens forward so that the front outer edges of the pair of contact arms are located at the outermost lateral side. Point contact is achieved between the lateral outer sides and the lateral inner sides of the pair of contact elastic arms.

[0014] Preferably, the lower housing is provided with first and second relief grooves at the front and rear sides corresponding to the positions of the first notch and the second notch. The bottom surface of the lower flat plate portion of the lower housing is thinned at the peripheries of the first notch and the second notch to form first and second thin plate portions, and the bottom surface of the glue block is flush with the bottom surfaces of the first and second thin plate portions.

[0015] In the RF switch of the present application, the first notch and the second notch of the first vertical arm and the second vertical arm that accommodate the moving terminal and the static terminal are set as sol-gel grooves, and glue is injected into the sol-gel grooves to wrap the outer peripheries of the first vertical arm and the second vertical arm, preventing the first welding portion and the second welding portion that are horizontally bent from the bottoms of the first vertical arm and the second vertical arm from allowing the molten solder to climb into the interior of the RF switch during welding and affecting the product performance. At the same time, a stepped portion is provided on the second insulator at the first notch and the second notch, and the first insulator extends to form first and second limiting portions on the outer sides in the front and rear directions corresponding to the first notch and the second notch, restricting the overflow range of the glue and preventing the glue from overflowing unrestrictedly and contaminating the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional combined view of the RF switch of the present invention;

[0017] Figure 2 is Figure 1 a three-dimensional combined view observed from another direction;

[0018] Figure 3 is a three-dimensional exploded view of the RF switch of the present invention;

[0019] Figure 4 is Figure 3 a three-dimensional exploded view observed from another direction;

[0020] Figure 5 is a three-dimensional view of the moving terminal and the static terminal of the RF switch of the present invention in a mating state;

[0021] Figure 6 is a three-dimensional combined view of the first insulator and the upper housing of the RF switch of the present invention;

[0022] Figure 7 is a three-dimensional combined view of the second insulator and the lower housing of the RF switch of the present invention;

[0023] Figure 8 is a three-dimensional view of the moving terminal and the static terminal of the RF switch of the present invention combined in the second insulator;

[0024] Figure 9 is a three-dimensional combined view of the RF switch of the present invention before encapsulation with glue;

[0025] Figure 10Top view of the radio frequency switch of the present invention;

[0026] Figure 11 is a cross-sectional view taken along the Figure 10 dashed line A-A shown;

[0027] Figure 12 is Figure 11 a partial enlarged view of the dotted circle shown;

[0028] Figure 13 is a cross-sectional view taken along the Figure 10 dashed line B-B shown.

[0029] The meanings of the reference numerals in the drawings are as follows: radio frequency switch - 100, metal housing - 10, upper housing - 11, upper flat part - 111, docking cylinder part - 112, first boss - 1121, accommodation space - 113, upper side wall - 114, upper side edge wall - 115, interval space - 116, lower housing - 12, lower flat part - 121, first relief groove - 122, first thin plate part - 123, second relief groove - 124, second thin plate part - 125, lower side wall - 126, lower side edge wall - 127, holding recess - 128, protruding part - 129, notch part - 1291, welding groove - 13, insulating body - 20, first insulator - 21, base body - 211, cylindrical part - 212, second boss - 2121, jack - 213, upper through groove - 214, first upper pressing part - 215, second upper pressing part - 216, third upper pressing part - 217, first glue limiting part - 218, second glue limiting part - 219, second insulator - 22, base part - 221, first notch - 222, second notch - 223, lower through groove - 224, lower concave space - 225, retaining wall - 226, inclined surface - 227, first lower pressing part - 228, second lower pressing part - 229, third lower pressing part - 23, lower convex block - 24, limiting space - 25, extending part - 251, limiting end - 252, channel - 26, outer edge part - 27, outer edge bottom - 28, outer edge side part - 29, conductive terminal - 30, moving terminal - 31, first welding part - 311, first vertical arm - 312, first through hole - 3121; elastic part - 313, main elastic arm - 314, contact elastic arm - 315, supporting end - 3151, thinned part - 3152, first clamped part - 316, connecting arm - 317, clamped leg - 318, groove - 3181, limiting end wall - 3182, static terminal - 32, second welding part - 321, second vertical arm - 322, second through hole - 3221, second clamped part - 323, contact arm - 324, crease part - 325, glue melting groove - 4, glue injection hole - 51, annular inclined surface - 511, glue injection part - 52, annular covering part - 521, glue block - 60, bonding block - 71, groove structure - 72. Detailed Description of the Invention

[0030] For ease of understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0031] 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 also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] This application takes Figure 1 the X direction shown as the left - right direction (lateral direction), the Y direction as the front - back direction (longitudinal direction), and the Z direction as the vertical direction. Especially in Figure 1 it, the moving terminal 31 is located at the front - end position in the front - back direction of the radio - frequency switch 100.

[0034] Please refer to Figures 1 to 4 as shown, the radio - frequency switch 100 of the present invention includes a metal housing 10, an insulating body 20 held within the metal housing 10, and conductive terminals 30 held within the insulating body 20.

[0035] The metal housing 10 includes an upper housing 11 and a lower housing 12 that cooperate up and down. The upper housing 11 includes a flat upper plate portion 111 arranged horizontally, a docking cylinder portion 112 that protrudes upward at the central position of the upper plate portion 111, and upper side walls 114 that are bent downward from the side edges of the upper plate portion 111 and extend vertically. The docking cylinder portion 112 can be used for plug - mating with the outer shell of a docking connector (not shown). A receiving space 113 that penetrates the upper housing 11 up and down is provided at the central position of the docking cylinder portion 112. The upper side walls 114 include two upper side - edge walls 115 that are respectively located at the left - and - right edges of the upper plate portion 111 in the lateral direction and are spaced apart, a total of four such upper side - edge walls 115. An interval space 116 is formed between the two upper side - edge walls 115 on the same side. A first boss 1121 is provided on the inner peripheral surface of the docking cylinder portion 112, and the convex surface of the first boss 1121 faces upward.

[0036] The lower housing 12 includes a flat lower plate portion 121 disposed horizontally, a first relief groove 122 and a second relief groove 124 disposed on the front and rear sides of the lower plate portion 121 and extending towards each other, and a lower side wall 126 formed by bending upward from the lateral edge of the lower plate portion 121 and extending vertically. The outer surface of the lower side wall 126 is correspondingly arranged and matched with the inner surface of the upper side wall 114. The lower side wall 126 includes two lower side edge walls 127 respectively located at the left and right edges of the lower plate portion 121 in the lateral direction and arranged at intervals, a total of four lower side edge walls 127. An extension portion 129 extending outward from the lateral sides of the lower plate portion 121 is disposed between the two lower side edge walls 127 on the same side, and the extension portion 129 is correspondingly matched with the spaced space 116. The extension portion 129 is provided to optimize the process design and play a role in connecting the strip, and the extension portion 129 extends beyond the lower side edge wall 127 in the lateral direction. A notch portion 1291 is formed between a pair of the lower side edge walls 127 on the upper side of the extension portion 129, and the bottoms of the pair of lower side edge walls 127 corresponding to the notch portion 1291 are recessed longitudinally so that the notch portion 1291 has a structure with a small opening and a large bottom in the lateral direction. The lower plate portion 121 further includes a first thin plate portion 123 and a second thin plate portion 125 respectively connected to the first relief groove 122 and the second relief groove 124 in the front-rear direction. The thickness of the first thin plate portion 123 and the second thin plate portion 125 in the up-down direction is less than the thickness of the lower plate portion 121 in the up-down direction. The upper surfaces of the first thin plate portion 123 and the second thin plate portion 125 are flush with the upper surface of the lower plate portion 121. The lower surfaces of the first thin plate portion 123 and the second thin plate portion 125 are higher than the lower surface of the lower plate portion 121. The first and second thin plate portions 123, 125 are formed by thinning during stamping. The bottom portions of the longitudinal ends of the lower side edge walls 127 are partially removed to form holding recesses 128. A glue injection hole 51 penetrates through the middle of the lower plate portion 121 up and down, and a circumferential inclined surface 511 is formed by pressing and thinning around the glue injection hole 51.

[0037] The upper housing 11 and the lower housing 12 can be made by metal stamping process, or can also be made by metal powder metallurgy process.

[0038] Please refer to Figures 1 to 13As shown, the insulating body 20 includes a first insulator 21 and a second insulator 22 disposed below the first insulator 21. The first insulator 21 includes a base body 211 and a cylindrical portion 212 that is located at the center of the base body 211 and protrudes upward. A jack 213 that penetrates the first insulator 21 vertically is provided at the center position of the cylindrical portion 212. A upper through groove 214 located on one side in the front-rear direction and a first upper pressing portion 215 and a second upper pressing portion 216 that are arranged at intervals in the front-rear direction and protrude downward are formed on the lower surface of the base body 211. Third upper pressing portions 217 protrude downward from both lateral sides of the upper through groove 214. The upper through groove 214 communicates with the jack 213. A second boss 2121 protrudes radially from the outer periphery of the cylindrical portion 212, and the convex surface of the second boss 2121 faces downward. The first insulator 21 and the upper housing 11 are integrally injection-molded. After molding, the second boss 2121 is clamped with the first boss 1121 of the upper housing 11 so that the first insulator 21 will not easily separate from the upper housing 11 downward. The base body 211 respectively protrudes downward at the front and rear ends to form a first glue-limiting portion 218 and a second glue-limiting portion 219. The first glue-limiting portion 218 is located at the front edge of the upper through groove 214, and the second glue-limiting portion 219 is located outside the rear end of the second upper pressing portion 216.

[0039] The second insulator 22 includes a flat base 221, a first notch 222 located on the front side of the base 221, and a second notch 223 located on the relatively rear side. A lower through groove 224 and a lower concave space 225 are formed by downward depression on the upper surface of the base 221. The lower through groove 224 is close to the first notch 222 and communicates with the first notch 222. The lower concave space 225 is close to the second notch 223 and communicates with the second notch 223. A pair of retaining walls 226 having inclined surfaces 227 are provided at positions on the left and right sides of the second notch 223 on the upper surface of the base 221. The inclined surface 227 of the retaining wall 226 is connected to the lower surface of the lower concave space 225. The lower surface of the lower concave space 225 is lower than the upper surface of the base 221 (including the retaining walls 226). A first downward pressing portion 228 and a second downward pressing portion 229 are provided at intervals in the front-rear direction on the side close to the second notch 223 in the lower concave space 225. The lower through groove 224 includes a limiting space 25 that is close to the first notch 222 and forms a space, and a channel 26 that communicates the limiting space 25 and the lower concave space 225. Third downward pressing portions 23 are formed by protruding upward from the base 221 on both sides of the lower through groove 224. Four lower protrusions 24 are formed by protruding upward in pairs at intervals on both sides of the lateral edge of the base 221. The lower protrusions 24 are respectively arranged opposite to the third downward pressing portions 23 and form the limiting space 25 that is limited in the front-rear direction. The limiting space 25 includes an extension portion 251 that is located in the middle and communicates the channel 26 to the first notch 222, and limiting ends 252 that are located on the lateral sides of the extension portion 251 and are limited by the lower protrusions 24 and the third downward pressing portions 23 in the front-rear direction. The second insulator 22 further includes outer edge portions 27 that extend outward from the front and rear sides of the base 221 respectively. The outer edge portions 27 include an outer edge bottom 28 that protrudes downward and outer edge side portions 29 that are located on the lateral sides of the outer edge portions 27. The lower surfaces of the outer edge bottom 28 and the outer edge side portions 29 are lower than the lower surface of the base 221. The lateral width between the outer peripheral edges of the outer edge side portions 29 located on the left and right sides of the second insulator 22 is greater than the lateral width of the base 221. However, in a preferred embodiment, the lateral width of the former is the same as the lateral width between the outer peripheral edges on the left and right sides of the upper housing 11. The lateral sides of the base 221 further include engaging blocks 71 that protrude respectively along the left and right sides. The protruding length of the engaging blocks 71 is the same as that of the protruding portions 129 of the lower housing 12. A groove structure 72 for holding with the lower side wall 127 is formed at the joint of the engaging blocks 71 and the notch portion 1291. The top surface of the retaining wall 226 is a horizontal plane, and the inclined surface 227 extends forward and downward from the top surface of the retaining wall 226.

[0040] Please refer to Figures 1 to 8As shown, the conductive terminal 30 includes a stationary terminal 32 and a moving terminal 31 that elastically contacts the stationary terminal 32. The moving terminal 31 includes a first welding portion 311 disposed flatly, a first vertical arm 312 extending upward and bent from the first welding portion 311, an elastic portion 313 bent from the first vertical arm 312 and extending in the front-rear direction, and a pair of first clamped portions 316 horizontally disposed on both sides of the connection position between the first vertical arm 312 and the elastic portion 313. The elastic portion 313 includes a main elastic arm 314 connected to the first vertical arm 312 and a pair of contact elastic arms 315 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 respectively formed by extending backward from the lateral sides of the main elastic arm 314, and a spaced space is formed between the pair of contact elastic arms 315. The pair of contact elastic arms 315 form a contact area in contact with the stationary terminal 32 at the inner upper edge of the spaced space. The free ends of the pair of contact elastic arms 315 form support ends 3151 supported on the upper surface or inclined surface 227 of the retaining wall 226. The end of the support end 3151 is thinned to form a thinned portion 3152 having an inclined surface shape. The thickness of the thinned portion 3152 is smaller than the thickness of the contact elastic arm 315, and the thickness of the thinned portion 3152 gradually thins toward the free end direction. The pair of first clamped portions 316 include connecting arms 317 connected to the first vertical arm 312 or the main elastic arm 314 and clamped feet 318 extending backward in the front-rear direction from the connecting arms 317. The pair of first clamped portions 316 sink into the limiting ends 252 on the lateral sides of the limiting space 25 of the second insulator 22, and the upper surface of the first clamped portion 316 extends upward beyond the upper surfaces of the third pressing portion 23 and the lower bump 24. The front-rear position of the first clamped portion 316 is limited by the lower bump 24 and the third pressing portion 23. The width of the limiting end 252 in the front-rear direction is slightly larger than the length of the first clamped portion 316 in the front-rear direction. The upper surface of the clamped foot 318 is provided with a groove 3181. The front and rear ends of the groove 3181 are formed with limiting end walls 3182, that is, the rear wall surface of the groove 3181 is a stepped structure and the rear wall surface is relatively sharp.

[0041] The static terminal 32 includes a second welding part 321 arranged flatly, a second vertical arm 322 formed by bending and extending upward from the second welding part 321, a second clamped part 323 formed by bending the second vertical arm 322 and extending in the front-back direction, and a pair of contact arms 324 formed by obliquely extending upward from both sides of the second clamped part 323. The pair of contact arms 324 are bent obliquely from the lateral two sides of the second clamped part 323 to form a crease part 325. The crease part 325 forms a certain angle with the front-back direction, causing the pair of contact arms 324 to open outward. There is a certain angle between the extending directions of the pair of creases 325, making the front side of the contact arms 324 closer to the lateral outer side. In this way, when the pair of contact arms 324 overlap the pair of contact elastic arms 315, the contact arms 324 only contact the contact elastic arms 315 through a single point on the outer side of the front end, ensuring stable switch performance. First through holes 3121 and second through holes 3221 are also formed through the first vertical arm 312 and the second vertical arm 322.

[0042] In the production and assembly process of the radio frequency switch 100 of the present invention, the following steps are included. However, the applicant needs to point out that the order of these steps is not fixed and unique, and can be appropriately adjusted according to requirements. Therefore, the differences brought about only by adjusting the order of these steps are still equivalent to the scope recorded in the present invention.

[0043] First, the upper shell 11, the lower shell 12, the moving terminal 31, and the static terminal 32 are manufactured through a metal stamping process.

[0044] Then, the first insulator 21 and the upper shell 11 are integrally injection molded into one body to jointly form an upper module. The upper surface of the base body 211 of the first insulator 21 is attached to the upper flat part 111 of the upper shell 11, and the cylindrical part 212 is held in the receiving space 113 of the docking cylindrical part 112. The first boss 1121 and the second boss 2121 are clamped with each other to increase the bonding force.

[0045] The second insulator 22 is integrally injection-molded with the lower housing 12 to form a lower module together. The lower surface of the base portion 221 of the second insulator 22 is attached to the upper surface of the lower flat portion 121. The first relief groove 122 and the first notch 222 are correspondingly matched, and the second relief groove 124 and the second notch 223 are correspondingly matched. The outer surfaces on the lateral sides of the base portion 221 are attached to the inner surfaces of the lower side walls 126, and the outer surfaces of the four lower bumps 24 are attached to the inner surfaces of the lower side walls 126. The outer edge portion 27 is held outside the front and rear edges of the lower flat portion 121. The outer edge side portion 29 of the outer edge portion 27 is held in the holding recess 128, and the bonding block 71 is held in the notch above the protruding portion 129 between the two lower edge walls 127, so that the front and rear outer edges of the second insulator 22 are more firmly held with the lower housing 12. The lower surfaces of the outer edge bottoms 28 of the front and rear outer edge portions 27 are flush with the lower surfaces of the first thin plate portion 123 and the second thin plate portion 125 respectively. The first thin plate portion 123 and the second thin plate portion 125 can increase the contact area with the second insulator 22 to make the holding force between the two stronger. In addition, since the lower housing 12 supports a large area on the lower side of the second insulator 22, the second insulator 22 can be better supported by the lower housing 12 to prevent the second insulator 22 from bending and deforming downward, thereby effectively ensuring the stability of the elastic cooperation between the moving terminal 31 and the static terminal 32 after the subsequent conductive terminals 30 are assembled.

[0046] Here, the applicant needs to clarify that in some embodiments, for the convenience of realizing the integral injection molding process of the second insulator 22 and the lower housing 12, during injection molding, the plastic flow is injected from the injection hole 51 penetrating through the lower flat portion 121 of the lower housing 12, and the lower surface of the base portion 221 of the second insulator 22 protrudes downward to form an injection portion 52 corresponding to the injection hole. An annular inclined surface 511 is formed on the inner edge of the bottom side of the injection hole 51, and the injection portion 52 is correspondingly formed with an annular covering portion 521 bonded and fixed on the annular inclined surface 511 to make the second insulator 22 and the lower housing 12 stably combined at the injection hole 51. The lower surface of the injection portion 52 does not extend downward beyond the lower surface of the lower flat portion 121. The injection hole 52 is a preferred injection position of an injection molding machine (not shown).

[0047] Then, the moving terminal 31 and the static terminal 32 are assembled between the upper module and the lower module. A pair of contact elastic 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 module and the lower module are assembled together in the vertical direction. The upper through groove 214, the lower through groove 224, the jack 213 and the lower concave space 225 form a communicating space.

[0048] At this time, the static terminal 32 is held at a position closer to the rear between the upper and lower modules. The second welding portion 321 and the second vertical arm 322 of the static terminal 32 are located within the second notch 223. The first upper pressing portion 215 and the second upper pressing portion 216 are vertically corresponding to the first lower pressing portion 228 and the second lower pressing portion 229 and clamp the second clamped portion 323. A pair of the contact arms 324 are suspended above the lower concave space 225. The moving terminal 31 is held at a position closer to the front between the upper and lower modules. The first welding portion 311 and the first vertical arm 312 of the moving terminal 31 are located within the first notch 222. The elastic portion 313 extends rearward through the limiting space 25 and the channel 26 to the lower concave space 225 after being bent from the first vertical arm 312. A pair of the third upper pressing portions 217 are vertically corresponding to the bottom surface of the limiting space 25 and clamp a pair of the clamped feet 318 to fix the moving terminal 31. The elastic portion 313 is suspended within the limiting space 25 and the lower concave space 225, so that a part of the elastic portion 313 located here can have a larger space for elastic deformation. The elastic portion 313 elastically contacts a point on the lateral outer surface of the contact arm 324 in a single-point contact form as a whole upward. After the moving terminal 31 and the static terminal 32 are assembled to the upper and lower modules, the elastic portion 313 is subjected to the vertical pressure from the static terminal 32 and the lower module, so that the elastic portion 313 is elastically deformed downward as a whole to form a shape that is not upwardly arched. During the process of assembling and fixing the upper module and the lower module, the elastic portion 313 can be pressed from an initial form to the current non-arched shape during this process. At this time, the elastic portion 313 shows a tendency to extend rearward after being bent from the first vertical arm 312 (in other embodiments, it can also extend obliquely rearward from high to low), and the free end of the contact elastic arm 315 abuts against the inclined surface 227 of the retaining wall 226. In this way, a relatively large elastic contact force is provided between the moving terminal 31 and the static terminal 32.

[0049] The outer surface of the lower side edge wall 127 of the lower housing 12 is attached to the inner surface of the upper side edge wall 115 of the upper housing 11. The lower surface of the upper side wall 114 is higher than the lower surface of the lower flat portion 121. A welding groove 13 is formed at a position between the lower edge of the upper side edge wall 115 and the outer surface of the lower side edge wall 127. The welding groove 13 is higher than the lower surface of the lower flat portion 121 in the vertical direction.

[0050] Finally, a welding process is used to perform welding at the welding groove 13 so that the upper housing 11 and the lower housing 12 are stably held together. In some embodiments, laser spot welding is preferably used in the welding process. The solder joints formed after welding can be spaced dots or strips, both of which are within the protection scope of the present invention. Additionally, in some other embodiments, directly welding the outer surfaces of the upper sidewall 115 and the lower sidewall 127 laterally can also achieve the purpose of fixing the upper housing 11 and the lower housing 12. Of course, welding and fixing can be performed at both locations. Further, in some embodiments, after all components of the RF switch 100 are assembled, the whole can be placed on a target circuit board (not shown), and then welded as a whole so that the moving terminal 31 and the static terminal 32 are respectively electrically connected to the corresponding solder pads on the circuit board, and the upper housing 11 and the lower housing 12 are welded and fixed at the lower end positions of the lower sidewall 127 and the upper sidewall 115 and electrically connected to the corresponding solder pads on the circuit board.

[0051] During the manufacturing process, between the second insulator 22 and the lower housing 12, in addition to integrally injection molding, they can also be held in an assembled and fixed manner. When the second insulator 22 and the lower housing 12 are assembled and fixed, the glue injection hole 51 is no longer the injection position of the injection machine, but is used to cooperate with the glue injection part 52 for fixing.

[0052] Please refer to Figure 9 、 Figure 11As shown, after the RF switch 100 of the present application is assembled, a dispensing operation is still required. After the upper module and the lower module clamp the moving terminal 31 and the static terminal, a glue melting tank 4 is respectively formed on the first vertical arm 312 and the second vertical arm 322. The glue melting tank 4 is formed at the positions of the first notch 222 and the second notch 223. Specifically, the first glue limiting parts 218 and the second glue limiting parts 219 at the front and rear ends of the first insulator 21 at least partially surround the front and rear ends of the glue melting tank 4. The inner peripheral edges of the first notch 222 and the second notch 223 form stepped parts 2221 and 2231 with downward openings, so that the opening on the lower side of the glue melting tank 4 is larger than the opening on the upper side to facilitate glue injection and sealing. The first vertical arm 312 and the second vertical arm 312, 322 are at least partially located in the glue melting tank 4. When sealing the glue, the glue is injected into the glue melting tank 4 along the inner side. The glue simultaneously penetrates through the first through holes 3121 and the second through holes 3221 of the first vertical arm 312 and the second vertical arm 322 and seeps to above the first welding part 311 and the second welding part 321, that is, below the first glue limiting parts 218 and the second glue limiting parts 219 on the outer side in the front-rear direction. After the glue penetrates through the first through holes 3121 and the second through holes 3221, it spreads in the transverse direction and fills the space above the first welding part 311 and the second welding part 321. The glue has a certain viscosity, and it is appropriate for the glue to flow to fill the glue melting tank 4 without oozing out of the glue melting tank 4 along the gap too much. After injecting the glue, the glue hardens to form a glue block 60 fixed in the glue melting tank 4. The presence of the glue block 60 can prevent the first welding part 311 and the second welding part 321 from wicking during welding. Specifically, the glue block 60 seals and wraps the first vertical arm 312 and the second vertical arm 322. During welding, the molten solder is blocked by the glue block 60 and cannot climb up along the first vertical arm 312 and the second vertical arm 322, thereby avoiding the internal contamination of the RF switch 100 caused by wicking and affecting the product performance.

[0053] It should be noted that when the viscosity of the glue permits, during dispensing, the RF switch 100 can be directly inverted and a predetermined amount of glue can be injected; in other embodiments, the RF switch 100 can also be pre-placed in a jig, and after the front and rear ends of the glue melting tank 4 are blocked by the jig, glue can be injected. At this time, the viscosity of the glue can be appropriately reduced.

[0054] Please refer specifically to Figures 11 to 13 as shown, Figure 11 、 Figure 12The solid line contact elastic arm 315 and the dotted line contact elastic arm 315 are schematic diagrams of the RF switch 100 of the present application in the initial state and the working state respectively; in the initial state, the contact elastic arm 315 is approximately in a horizontal state, and the bottom surface of the support end 3151 is supported on the horizontal surface of the retaining wall 226. At this time, the end of the support end 3151 is at the L1 position in the front-to-back direction, and the upper surface of the contact elastic arm 315 is at the H1 position in the vertical direction. In the working state, a probe (not shown) is inserted from the jack 213 from top to bottom and presses the main elastic arm 314 of the movable terminal 31 downward, and the main elastic arm 314 is elastically deformed downward, so that the contact elastic arm 315 is also deformed downward and the support end 3151 moves forward and separates from the contact arm 324. During the process of the probe pressing downward, the elastic part 313 moves downward as a whole, and the support end 3151 of the contact spring arm 315 moves forward a small distance along the horizontal surface of the retaining wall 226 and the inclined surface 227, that is, the support end 3151 moves toward the direction of the first welding part 311. At this time, the end of the support end 3151 is at the position L2, which is more forward than the position L1, and the upper surface of the contact spring arm 315 becomes the upper surface of the thin part 3152 of the support end 3151 (the inclined surface becomes a horizontal surface). At this time, the upper surface of the thin part 3152 is at the position H2 in the vertical direction, and the horizontal position of H2 is not higher than the horizontal position of H1. Therefore, in the working state, the relative length of the movable terminal in the front-to-back direction is shorter after being pressed downward than before being pressed, so it is conducive to the demand for miniaturized design of the product. When the contact spring arm 315 is in the working state, the thin portion 3152 is provided on the support end 3151 so that its upper surface does not exceed the upper surface in the initial state, thereby preventing the support end 3151 from tilting upward in the working state and causing a short circuit due to a small gap between the support end 3151 and the upper flat plate portion 111 of the upper shell 11. When the probe is pulled upward, the elastic portion 313 is reshaped and moves upward to restore the original state.

[0055] Key References Figure 13As shown, the first clamped portion 316 of the moving terminal 31 is limited within the limiting end 252 of the limiting space 25 in the front-rear direction. At the same time, the surface of the limiting end 252 and the third upper pressing portion 217 clamp the first clamped portion 316, and the third upper pressing portion 217 presses on the upper side of the clamped leg 218. During the process of the probe pressing down on the moving terminal 31, the moving terminal 31 is deformed as a whole and generates a forward thrust. At this time, a hard interference is generated between the limiting end wall 3182 on the clamped leg 318 and the third upper pressing portion 217, prompting the limiting end wall 3182 to pierce or scrape the lower surface of the third upper pressing portion 217, and a part of the plastic of the third upper pressing portion 217 will sink into the groove 3181 to prevent the first clamped portion 316 from moving back and forth. At the same time, the limiting end 252 of the limiting space 25 limits the first clamped portion 316 in the front-rear direction. In this way, the clamping force for clamping the first clamped portion 316 between the third upper pressing portion 217 and the upper surface of the second insulator 22 or the third lower pressing portion 23 or the lower bump 24 can be greatly reduced, thereby reducing the internal stress between the first and second insulators 21 and 22, and thus improving the stability of the first and second insulators 21 and 22 when passing through the high-temperature IR furnace, and avoiding the problem of warping caused by the release of internal stress at high temperature. At the same time, a lower side wall 126 for limiting the contact elastic arm 315 is provided on the lateral outer side of the retaining wall 226 and the inclined surface 227, reducing the occurrence of shaking of the contact elastic arm 315 and enhancing the reliability of the contact elastic arm 315.

[0056] In another embodiment, a protruding portion (not shown) protruding downward may be provided at the position of the groove 3181 on the third upper pressing portion 217 to be snapped into the groove 3181 for limiting. At this time, the hard interference between the limiting end wall 3182 and the third upper pressing portion 217 may no longer be required.

[0057] For key reference Figure 3 、 Figure 4 、 Figure 7 、 Figure 11 As shown, a second boss 2121 is provided on the outer circumference of the cylindrical portion 212 of the first insulator 21 of the RF switch 100 of the present application, and a first boss 1121 that cooperates with the second boss 2121 is provided on the inner wall surface of the docking cylindrical portion 112 of the upper housing 11. After injection molding, the first boss 1121 and the second boss 2121 are mutually adhered and held, which can enhance the bonding force between the cylindrical portion 212 of the first insulator 21 and the docking cylindrical portion 112 of the upper housing 11, and prevent the first insulator 21 from disengaging downward from the upper housing 11.

[0058] The second insulator 22 is attached to the upper surface of the lower housing 12 to obtain a rigid support for the lower housing 12, increasing the strength of the second insulator 22. At the same time, outer edge side portions 29 are provided on the lateral outer sides of the front and rear ends of the second insulator 22, and holding recesses 128 are provided at corresponding positions of the lower housing 12. After molding, the holding recesses 128 press on the upper sides of the outer edge side portions 29; a coupling block 71 protrudes laterally outward between a pair of the outer edge side portions 29 of the second insulator 22, and a protruding portion 129 for coupling and supporting the coupling block 71 is formed between a pair of lower side wall edges 127 of the lower housing 12, and the coupling block 71 fills the groove structures 72 at the bottoms of the opposite side surfaces of the pair of lower side wall edges 127, thereby increasing the coupling force between the second insulator 22 and the lower housing 12. An annular inclined surface 511 is provided at the bottom of the glue injection hole 51 penetrating through the lower housing 12, and the glue injection portion 52 filled in the glue injection hole 51 fills the annular inclined surface 511 at the lower side and forms an annular covering portion 521, so that the second insulator 12 and the lower housing 12 are tightly combined and will not separate. Thus, up to 7 fastening points are formed between the second insulator 22 and the lower housing 12, enabling the second insulator 22 to be firmly attached to the lower housing 12, minimizing the deformation of the second insulator 22 when passing through a high-temperature IR furnace to avoid product defects.

[0059] On the bottom surface of the lower housing 12, first and second thin plate portions 123, 125 are formed inside the first notch 222 and the second notch 223. The first and second thin plate portions 123, 125 can increase the support surface for supporting the second insulator 22, and at the same time, the front and rear side surfaces are covered by the filled glue blocks 60 to avoid the conductive terminals 30. The bottom surface of the lower flat plate portion 121 of the lower housing 12 is directly used as a solder leg to be welded to a target circuit board.

[0060] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0061] The above embodiments only represent the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A radio frequency switch, comprising a first insulator and a second insulator which are cooperated in the up-and-down direction, a static terminal, a moving terminal clamped between the first insulator and the second insulator, and an upper housing and a lower housing which are respectively fixed outside the first insulator and the second insulator and are fixedly connected to each other. A base body is provided on the first insulator. The second insulator includes a base portion and a first notch and a second notch formed in the middle of the front and rear ends of the base portion. The moving terminal and the static terminal respectively include a first vertical arm and a second vertical arm located in the first notch and the second notch, and a first welding portion and a second welding portion horizontally bent from the bottoms of the first vertical arm and the second vertical arm. The moving terminal includes an elastic portion bent from the first vertical arm and extending in the front-rear direction towards the static terminal, and a pair of first clamped portions horizontally arranged on both sides of the connection position between the first vertical arm and the elastic portion. An upper through groove is formed in the lower surface of the base body corresponding to the lower through groove. A lower through groove is formed by downward depression on the upper surface of the base portion of the second insulator. Third upper pressing portions protrude downward from the lateral sides of the upper through groove. The lower through groove further forms a limiting space, and is characterized in that, The first notch and the second notch respectively form a sol tank. Glue is injected into the sol tank to wrap the outer circumferences of the first vertical arm and the second vertical arm to form a glue block. The first clamped portion of the moving terminal is limited in the limiting end of the limiting space in the front-rear direction, and the surface of the limiting end and the third upper pressing portion clamp the first clamped portion.

2. The RF switch according to claim 1, wherein When the RF switch is inverted, glue is injected into the first notch and the second notch from top to bottom. The inner circumferences of the first notch and the second notch are formed with stepped portions with openings facing downwards, so that the opening at the bottom of the sol tank is larger than the upper opening, and the stepped portion is of an inclined surface structure.

3. The RF switch according to claim 2, characterized in that, The first vertical arm and the second vertical arm are respectively formed with a first through hole and a second through hole penetrating in the front-rear direction. Glue overflows through the first through hole and the second through hole to the front and rear sides of the first vertical arm and the second vertical arm, so that the glue wraps around the first vertical arm and the second vertical arm on all sides.

4. The RF switch according to claim 3, wherein, The first insulator further includes a jack penetrating the base body up and down and a first glue limiting portion and a second glue limiting portion protruding downward from the front and rear side edges of the base body. The first glue limiting portion and the second glue limiting portion extend downward to the outside of the first vertical arm and the second vertical arm and at least partially enclose the sol tank in the longitudinal direction. When the glue overflows through the first through hole and the second through hole to the front and rear outer sides of the sol tank, the glue adheres to the lower surfaces of the first glue limiting portion and the second glue limiting portion.

5. The RF switch according to claim 4, wherein, The upper housing includes an upper flat portion, a docking cylinder portion protruding upward at the center position of the upper flat portion, and an upper side wall formed by bending downward and extending vertically from the side edge of the upper flat portion. The lower housing includes a flat lower flat portion and a lower side wall formed by bending upward and extending vertically from the side edge of the lower flat portion. The inner surface of the upper side wall is attached to the outer surface of the lower side wall, and a welding groove is formed between the lower edge of the upper side wall and the outer surface of the lower side wall, so that the upper housing and the lower housing are welded and fixed at the welding groove.

6. The RF switch according to claim 5, wherein The first insulator and the upper housing are integrally injection-molded, and the second insulator and the lower housing are integrally injection-molded. A lower concave space is further formed by downward depression on the upper surface of the base of the second insulator. The lower through groove is close to the first notch and communicates with the first notch. The lower concave space is close to the second notch and communicates with the second notch. A pair of inclined walls are provided at the positions on the left and right sides of the second notch on the upper surface of the base. A first lower pressing portion and a second lower pressing portion are provided at intervals in the front-rear direction on the side close to the second notch in the lower concave space.

7. The RF switch according to claim 6, wherein, The first insulator further includes a cylindrical portion protruding upward at the center position of the base body. The jack penetrates downward through the cylindrical portion and the base body. First upper pressing portions and second upper pressing portions protrude downward from the lower surface of the base body corresponding to the first lower pressing portion and the second lower pressing portion.

8. The RF switch according to claim 7, wherein A pair of the first clamped portions includes a connecting arm connected to a connecting position of the first vertical arm and the elastic portion, and a clamped leg extending rearward in the front-rear direction from the connecting arm. The elastic portion includes a main elastic arm suspended above the lower through groove, and a pair of contact elastic arms extending from lateral sides of the main elastic arm toward the second notch. The static terminal further includes a second clamped portion horizontally bent and extending from the second vertical arm toward the moving terminal, and a pair of contact elastic arms obliquely extending from lateral sides of the second clamped portion. The first clamped portion of the moving terminal is clamped between the second insulator and the third upper pressing portion, and the second clamped portion of the static terminal is clamped between the first and second lower pressing portions of the second insulator and the first and second upper pressing portions of the first insulator.

9. The RF switch according to claim 8, wherein Free ends of a pair of contact elastic arms of the moving terminal form supporting ends supported on an upper surface of the blocking wall or the inclined surface. The supporting ends are thinned toward the rear to form thinned portions. The second clamped portion of the static terminal is located between a pair of the contact elastic arms. A crease portion is formed between a pair of the contact elastic arms from between the second clamped portions. The crease portion opens forward so that outer edges on the front sides of a pair of the contact elastic arms are located at outermost laterally. Point contact is achieved between lateral outsides and inner sides of a pair of the contact elastic arms.

10. The RF switch according to claim 5, characterized in that The lower housing is provided with first and second avoidance grooves at front and rear sides corresponding to positions of the first notch and the second notch. Bottom surfaces of the first and second thin plate portions are formed by thinning peripheries of the first notch and the second notch on a bottom surface of a lower flat plate portion of the lower housing. Bottom surfaces of the glue blocks are flush with bottom surfaces of the first and second thin plate portions.

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