TWM642782U - Electrical Connector Assembly - Google Patents

Abstract

The present model provides an electrical connector assembly, which includes a male connector and a mounting seat. The male connector includes an insulating seat, a central conductive part fixed in the insulating seat, and a metal shell sleeved on the outside of the insulating seat. And a locking cover installed on the outside of the metal shell; the mounting seat includes an insulating mounting shell and a conductive floating contact arranged in the mounting shell, the mounting shell has a pair of butt posts protruding upwards, and the butt post There is an installation channel penetrating in the up and down direction, the floating contact piece is arranged in the installation channel, a storage channel is formed in the floating contact piece, and there are a plurality of elastic contact pieces protruding and extending toward the storage channel, the locking cover of the male end connector It is detachably locked on the docking column, and the metal shell is inserted into the storage channel and can swing in the storage channel. The electrical connector component is convenient for repairing and replacing the connector, and can also well adapt to assembly tolerances and improve reliability in a vibration environment.

Description

Electrical Connector Assembly

The present invention relates to the field of electrical connectors, in particular to a detachably connected electrical connector assembly.

Boxes mounted on electronic equipment such as vehicles need to be connected to external cables through electrical connectors to achieve power connection and data transmission. For electronic devices with high waterproof requirements such as cameras, if there is a gap between the electrical connector and the box of the electronic device, water-containing air will invade the interior of the electronic device through the gap, resulting in blurred lens inside the electronic device .

In order to solve the above problems, Chinese invention patent application CN108574180B discloses an assembly structure of an electrical connector. It includes: a shell, an electrical connector, and an adhesive. The shell has a through insertion hole. The electrical connector has an insulating shell and a conductive shell that is partially covered by the shell and protrudes from the shell to the outside. the outer case, the outer case is inserted through the insertion holes, the adhesive is attached to the front of the case and the outer case protruding from the case, and is applied to the cases, the outer cases and the outer case in the insertion holes The outer casing is bonded to seal the interior of the electronic device equipped with the electrical connector, preventing air from entering the electronic device.

However, this kind of electrical connector is fixed to the shell with adhesive, and it will be difficult to disassemble after being fixed. If the electrical connector is damaged during use, it will cause the entire electronic device to be replaced and repaired high cost. Moreover, its electrical connector cannot float. If there are manufacturing or assembly tolerances, there will be misalignment between the electrical connector and the female connector on the electronic device, and effective docking cannot be achieved, and this electrical connector is also difficult to adapt to the vehicle. Vehicles with frequent vibrations often cause poor contact due to vibration dislocation, and poor signal transmission reliability, which needs further improvement.

The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art, and propose an electrical connector assembly with reliable docking and low maintenance cost.

According to an embodiment of the present invention, the present invention proposes an electrical connector assembly, which includes: a male end connector, including an insulating seat, at least one central conductive member fixed in the insulating seat, sleeved on the insulating seat a metal shell on the outside of the insulating seat and a locking cover installed on the outside of the metal shells; and, a mounting seat including: an insulating mounting shell and a conductive floating contact arranged in the mounting shell , the installation shells have a pair of butt joint posts protruding upwards, and an installation channel is opened in the butt joint posts along the up and down direction, the floating contacts are arranged in the installation channels, and there are formed in the floating contacts The receiving channel has a plurality of elastic contact pieces protruding into the receiving channel; the male connectors are inserted into the mounting seats, and the locking covers are detachably locked on the docking columns, The metal shells are inserted into the containment channels and can be placed in the containment channels When moving, the elastic contact pieces elastically contact the metal shells.

In one embodiment, the central conductive parts include a central pin base and a central pin joint plugged on the central pin base, the central pin bases include a tubular butt end and are integrally upward from the butt end Extended riveting ends, the butt ends are sleeved on the center pin connectors.

In one embodiment, the upper ends of the center-pointing joints are provided with inserting parts for inserting into the butt ends, the inserting parts are provided with slots, and the butt ends have holes extending into the slots. buckle.

In one embodiment, the locking covers are provided with fixing rings sleeved on the upper ends of the metal shells and elastic arms located outside the fixing rings, and the elastic arms surround the outer sides of the metal shells An insertion channel for the insertion of the docking columns is formed between the metal shells, and an insertion groove communicating with the insertion channels is formed between the fixing rings and the elastic arms. A sealing ring is provided.

In one embodiment, the positions near the upper ends of the metal shells protrude radially outward to form a limiting ring, the lower ends of the fixing rings abut against the limiting rings, and the inner parts of the fixing rings are provided with power supply cables. A sealing member is provided between the fixing rings and the cables through the channel penetrating therein.

In one embodiment, the locking covers further include cover parts connected to the fixing rings and the elastic arm parts, the cover parts extend into the channels of the fixing rings to form cover edges, the Narrow slots under the cover edges are formed between the fixing ring and the cables, and the seals include sealing rings, and the sealing rings are arranged at the narrow slots.

In one embodiment, the elastic arms of the locking covers are provided with at least one limiting hole, The butt posts are provided with at least one position-limiting protrusion protruding outwards, and the position-limiting protrusions are snapped into the position-limiting holes; At least one guide groove extending upwards from the lower end of the butt joint column, at least one guide rib is provided on the butt posts, and the guide ribs are inserted into the guide grooves.

In one embodiment, the metal shells include inner sleeves and outer sleeves that are inserted into each other, the insulating bases and the central conductive parts are accommodated in the inner sleeves, the inner sleeves and the A sandwich for housing the cable shield is formed between the outer sleeves.

In one embodiment, the inner sleeves have first riveted parts, the outer sleeves have second riveted parts sleeved on the outer walls of the first riveted parts, and the first riveted parts A reinforcing ring is provided inside to cling to the inner wall of the first riveting parts, and the first riveting parts and the second riveting parts are combined together through riveting.

In one embodiment, the opposite wall surfaces of the first riveting portions and the second riveting portions are respectively provided with a plurality of grooves or ribs.

In one embodiment, the central conductive parts are floating pins, the inner sleeves include floating parts that at least partially protrude downward from the outer sleeves, the floating parts are in the shape of a cylinder, and the cylinder has a plurality of Extending to the slits at the lower ends of the floating parts, a plurality of the slits are distributed at intervals along the circumference of the cylinder body of the floating parts, and a floating elastic arm is formed between two adjacent slits.

In one embodiment, the inner sleeves include: a first straight cylindrical portion, a second straight cylindrical portion extending downward from the first straight cylindrical portion, and a tapered cylindrical portion extending downward from the second straight cylindrical portion with a tapered caliber. The diameter of the equal-cone cylinder extends downward slightly to form a leading portion.

In one embodiment, the floating pins include fixed contacts and can be positioned relative to the fixed contacts Floating contacts that move up and down. Elastic parts are arranged between the fixed contacts and the floating contacts. The outer circumference of the fixed contacts is also covered with elastic sleeves. The fixed contacts are connected, and the other end is formed with a plurality of claws elastically contacting the floating contacts.

In one embodiment, the floating contacts include a cylinder and a plurality of conductive protrusions extending radially outward from the lower ends of the cylinders, and the lower parts of the installation housings have accommodations communicating with the installation channels. cavities, the accommodating cavities are provided with shielding covers, the cylinders are installed in the installation channels, and the conductive protrusions protrude from the installation channels and contact the shielding covers.

In one embodiment, local areas of the barrels are torn apart to form the elastic contact pieces, and the elastic contact pieces are distributed in the circumferential direction of the barrels at intervals.

In one embodiment, a shielding cavity is formed inside the shielding covers, openings communicating with the shielding cavity are provided on the shielding covers, and the lower ends of the metal shells protrude into the shielding cavity .

Compared with the prior art, the present invention has at least the following advantages:

The electrical connector assembly of the present invention includes a mounting base and a male end connector, and the detachable connection between the two is realized through the locking cover on the male end connector and the docking post on the mounting base, which facilitates the maintenance of the male end connector It also saves the maintenance cost; in addition, because the floating contact piece is set in the docking column of the mounting seat, the floating contact piece is provided with a plurality of elastic contact pieces, and these elastic contact pieces can be inserted into the mounting seat. The metal shell of the male end connector can be matched with the metal shell, so that the male end connector can be floatingly installed in the mounting seat, and can be docked with another connector in a floating manner, so that it can well adapt to the assembly tolerance and the docking reliability in the vibration environment , so that it can still work normally in a vibration environment.

1000: electrical connector combination

100, 200: electrical connector assembly

10:Male connector

11: Central conductive part

111: Center for connector

1111: needle body

1112: tip

1113: the first socket

1114: card slot

1115: the second socket part

112: center needle base

1121: butt end

1122: Riveting end

1123: buckle

1124: limit buckle

1125: stopper

1126: Crimp piece

1127: Crimp channel

12: Insulation seat

121: seat body

122: socket part

123: Groove

124: Through hole

125: shrink neck

126: steps

14: metal shell

141: inner sleeve

1411: The first riveting part

1412: channel

1413: Leading part

1414: limit part

1415: first groove

142: outer sleeve

1421: The second riveting part

1422: conductive contact part

1423: limit ring

1424:Boss

143: Strengthening ring

15: cable

151: core wire

152: inner insulating layer

153: shielding layer

154: Outer insulating layer

16: Conductive components

17: Locking cover

171: cover body

1711: cover

1712: elastic arm

1713: Fixed ring

1714: limit hole

1715: guide groove

1716: socket slot

1717: channel

1718: plug channel

172: sealing ring

173: sealant

20: Mounting seat

21: Install the shell

211: shell body

2111: side wall

2112: top wall

2113: card hole

2114: Accommodating cavity

2115: positioning protrusion

212: Butt column

2121: limit protrusion

2122: guide rib

2123: Install channel

2124: positioning slot

22: floating contact

221: barrel

222: conductive protrusion

223: Containment channel

224: elastic contact piece

225: Gap

23: shielding cover

231: cover top wall

232: cover side wall

233: Buckle

234: Edge

235: opening

236: shielded cavity

30:Male connector

31: Central conductive part

311: floating contact

312: fixed contact

3121: card slot

313: Elastic bushing

3131: Claw

3132: elastic contact finger

314: Elastic parts

32: Insulation seat

321: seat body

322: limit slot

323: through hole

34: metal shell

341: inner sleeve

3410: floating part

3411: The first straight part

3412: channel

3413: The second straight part

3414: buckle

3415: slit

3416: first groove

3417: cone part

3418: Leading part

3419: elastic arm

342: outer sleeve

3421: riveting part

3422: Conductive contact

3423: limit ring

3424:Boss

343: Strengthening ring

35: cable

351: core wire

353: shielding layer

354: Outer insulating layer

37: Locking cover

371: cover body

3711: cover

3712: elastic arm

3713: retaining ring

3714: limit hole

3715: guide groove

3716:Channel

3717: cover edge

3718: narrow slit

3719: plug slot

372: sealing ring

373: sealing ring

40: Female connector

41: Central conductive terminal

411: Solder tail

42: Insulation seat

421: Center hole

43: docking shell

431: shell

432: elastic arm

433: Welding feet

50: circuit board

Other features and effects of the new model will be clearly presented in the implementation with reference to the drawings, in which: Figure 1 is a combination of the electrical connector assembly formed after the first embodiment of the new model is docked with the female connector Stereoscopic view; Figure 2 is a front view of the electrical connector combination in Figure 1; Figure 3 is a sectional view of A-A in Figure 2; Figure 4 is a three-dimensional exploded view of the electrical connector combination in Figure 1; The front view of the end connector; Fig. 6 is a B-B sectional view of Fig. 5; Fig. 7 is a front view of the mounting seat in Fig. 4; Fig. 8 is a C-C sectional view of Fig. 7; Fig. 9 is a male end connector in Fig. 6 An exploded perspective view of a viewing angle; FIG. 10 is a perspective exploded view of the male connector in FIG. 6 from another perspective; FIG. 11 is a perspective exploded view of the central conductive member of the male connector in FIG. 6; FIG. An exploded perspective view of the central conductive part and insulating seat of the male connector in Figure 6; Figure 13 is a perspective exploded view of the central conductive part, insulating seat and reinforcing ring of the male connector in Figure 6 Figure; Figure 14 is a three-dimensional exploded view of the conductive component of the male connector in Figure 6; Fig. 15 is a three-dimensional exploded view of the locking cover of the male connector in Fig. 6; Fig. 16 is a perspective exploded view of the mounting seat in Fig. 8; Fig. 17 is a perspective exploded view of the mounting seat in Fig. 8 in another view ; Figure 18 is a perspective view of the second embodiment of the new electrical connector assembly; Figure 19 is a front view of the second embodiment of the new electrical connector assembly; Figure 20 is a D-D sectional view of Figure 19; Figure 21 is Figure 18 Figure 22 is a perspective exploded view of the conductive component of the male connector in Figure 20; Figure 23 is a perspective exploded view of the central conductive member of the male connector in Figure 20; Fig. 24 is a perspective view of the insulating seat of the male connector in Fig. 20; Fig. 25 is an assembly state diagram of the central conductive part, the insulating seat and the reinforcing ring of the male connector in Fig. 20; An exploded perspective view of the locking cover of the male connector.

While the invention may readily take the form of embodiments, only a few of them have been shown in the drawings and will be described in detail in this specification, it being understood that this This is an exemplary illustration of the principles of the invention and is not intended to limit the invention to what is described herein.

Thus, a feature identified in this specification will serve to illustrate an embodiment of the invention. One of the features of the embodiments, but does not imply that every embodiment of the present invention must have the described features. Furthermore, it should be noted that this specification describes a number of features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Thus, the illustrated combinations are not intended to be limiting unless otherwise stated.

In the embodiments shown in the drawings, directional indications such as up, down, left, right, front and rear are used to explain that the structure and movement of the various elements of the present invention are not absolute but relative. These descriptions are applicable when the elements are in the positions shown in the drawings. If the indications of the positions of these elements are changed, the indications of these directions are changed accordingly.

Referring to Fig. 1-Fig. 26, they are two preferred implementations of the new electrical connector assembly. The electrical connector assembly in the two preferred embodiments can be connected with the female connector to form an electrical connector combination. The electrical connector combination can be suitable for the connection between electronic devices or the connection between electronic devices and cables to realize signal transmission. The electronic device may be, for example, a wireless communication device, a driving recorder, a car navigation device, a camera, a car audio or a car control panel, and the like.

The electrical connector assembly includes: a male connector 10 (or 30 ), a mount 20 , a female connector 40 and a circuit board 50 . The external electronic equipment is connected to the male connector 10 (or 30) through the cable 15, and the male connector 10 (or 30) is plugged on the mounting base 20 and forms an electrical connector assembly 100 (or 200) together with the mounting base 20 ). The female connector 40 is installed on the circuit board 50 , and together with the circuit board 50 is accommodated in the mounting seat 20 , and is pluggably mated with the male connector 10 in the mounting seat 20 .

Below in conjunction with the accompanying drawings of this specification, the preferred embodiments of the present invention will be further described in detail.

For ease of expression, this article defines the end of the electrical connector assembly that is docked with the female connector as "down", and the end of the electrical connector assembly that is away from the female connector as "upper".

Referring to FIG. 1 to FIG. 17 , it is a first embodiment of an electrical connector assembly 100 . The electrical connector assembly 100 includes: a male connector 10 and a mount 20 for inserting the male connector 10 thereon.

The electrical connector assembly 100 can cooperate with the female connector 40 installed on the circuit board 50 to form an electrical connector assembly 1000 .

3 and 4, the female connector 40 is connected to a circuit board 50, which includes: an insulating seat 42, a central conductive terminal 41 inserted in the insulating seat 42, and a sleeve set outside the insulating seat 42. Butt shell 43 .

A central hole 421 is formed axially through the insulating base 42 , and the central conductive terminal 41 is inserted into the central hole 421 . The upper end of the central conductive terminal 41 has an insertion hole for inserting the central conductive member 11 of the male connector 10 , and the lower end protrudes outward from the insulating seat 42 to form a solder tail 411 . The solder tail 411 is used for soldering on the circuit board 50 to realize electrical connection with the circuit board 50 .

The docking housing 43 is made of conductive material, and includes an annular housing 431 , a plurality of elastic arms 432 extending upward from the housing 431 , and a plurality of welding legs 433 disposed at the bottom of the housing 431 . A plurality of elastic arms 432 are distributed along the circumference of the housing 431 at intervals and form a cylindrical shape. When the docking housing 43 is fitted on the insulating base 42 , the plurality of elastic arms 432 surround the outer circumference of the insulating base 42 . The soldering pin 433 at the bottom of the docking housing 43 is preferably used to connect with the ground circuit on the circuit board 50 .

Referring to FIG. 5 , FIG. 6 , FIG. 9 and FIG. 10 , the male connector 10 includes: a conductive component 16 and a locking cover 17 fixed on the upper end of the conductive component 16 .

The conductive component 16 includes: a central conductive part 11, an insulating seat 12 on which the central conductive part 11 is inserted, a metal shell 14 sleeved on the outer periphery of the insulating seat 12, and a locking cover 17 installed on the metal of the conductive component 16. The upper end of shell 14.

The cable 15 is connected to the male end connector 10, which includes: a core wire 151 located in the central layer, an inner insulating layer 152 wrapped outside the core wire 151, a shielding layer 153 wrapped outside the inner insulating layer 152, and a shielding layer wrapped outside the shielding layer 153. The outer insulating layer 154. The core wire 151 of the cable 15 is connected to the central conductor 11 , and the shielding layer 153 of the cable 15 is connected to the metal shell 14 .

Referring to FIG. 6 , FIG. 11 to FIG. 13 , the central conductive member 11 includes two parts that are socketed and connected to each other, that is, the central pin base 112 and the central pin connector 111 inserted on the central pin base 112 .

The center needle connector 111 includes: a needle body 1111 , a tip 1112 formed at the lower end of the needle body 1111 , and an insertion portion formed at the upper end of the needle body 1111 for docking with the center needle base 112 . The outer diameter of the insertion part is smaller than the outer diameter of the needle body 1111 , so that after the insertion part is inserted into the center needle base 112 , a central conductive member 11 with a vertically equal diameter is formed therewith.

The plug-in part includes: a first plug-in part 1113 and a second plug-in part 1115, and a slot 1114 is arranged on the plug-in part, and the slot 1114 is spaced between the first plug-in part 1113 and the second plug-in part 1115 . The end of the second insertion part 1115 is provided with a guiding tapered surface to facilitate its insertion into the center needle base 112 .

The central needle base 112 includes: a tubular butt end 1121 and a riveting end 1122 integrally extended upwards from the butt end 1121 .

The butt end 1121 is provided with a buckle 1123 recessed into the tube and at least one stop buckle 1124 protruding out of the tube. In this embodiment, there are two limit buckles, and the two limit buckles 1124 are symmetrically arranged on opposite sides. Both sides of terminal 1121. The butt joint end 1121 is partially disconnected from the riveting end 1122 but not completely separated at a position close to the riveting end 1122 , and forms two stoppers 1125 protruding outward from the tube at the disconnected position.

A crimping channel 1127 for inserting the core wire 151 of the cable 15 and two relatively curved crimping pieces 1126 are formed on the crimping end 1122 . After the core wire 151 of the cable 15 is inserted into the crimping channel 1127, the crimping piece 1126 compresses the core wire 151 of the cable 15 through a crimping process, thereby realizing the electrical connection between the two.

The center needle base 112 is sleeved outside the insertion portion of the center needle connector 111 through its butt end 1121 , and the buckle 1123 on the butt end 1121 extends into the slot 1114 of the insertion portion correspondingly to prevent the two from being disengaged.

The center needle connector 111 can be processed by CNC technology, so that the tip 1112 has better smoothness, which is convenient for smooth docking with the female connector 40, and the center needle base 112 can be formed by stamping technology, which not only has low production cost , and different lengths can also be designed according to actual needs, so that the center conductive member 11 of different lengths can be obtained by cooperating with the center point connector 111 . It can be seen that the way that the central conductive member 11 is connected to each other through the center pin joint 111 and the center pin base 112 can not only improve the design flexibility, but also save the production cost.

Referring to Fig. 6, Fig. 12 and Fig. 13, the insulating seat 12 is formed on the outer periphery of the central conductive member 11, which includes: a seat body 121, a socket portion 122 formed by extending upward from the seat body 121 and extending downward from the seat body 121 And the constricted portion 125 is formed.

The insulating seat 12 is provided with a through hole 124 for inserting the central conductive member 11 therein, and the through hole 124 penetrates the seat body 121 , the sleeve portion 122 and the constricted portion 125 along the vertical direction.

The seat body 121 is provided with at least one groove 123 , the number of the grooves 123 is the same as the number of the stop buckles 1124 on the central conductive member 11 , there are two in this embodiment. The two grooves 123 pass through the through hole 124 in the transverse direction, so that the two limit buckles 1124 on the central conductive member 11 in the through hole 124 can respectively extend into the two grooves 123 to engage the central conductive member 11 with the insulating base 12 .

The outer diameter of the sleeve portion 122 is reduced relative to the seat body 121 , so that an annular groove for accommodating a reinforcing ring 143 (detailed below) is formed on the surface of the sleeve portion 122 . The outer diameter of the constricted portion 125 is also reduced relative to the seat body 121 , so that a step 126 is formed at the junction of the seat body 121 and the constricted portion 125 .

Referring to FIG. 6 and FIG. 14 , the metal shell 14 includes an inner sleeve 141 and an outer sleeve 142 that are inserted into each other. The insulating seat 12 and the central conductive member 11 are accommodated in the inner sleeve 141 , and the insulating seat 12 is spaced between the central conductive member 11 and the inner sleeve 141 to insulate them from each other.

An interlayer for accommodating the shielding layer 153 of the cable 15 is formed between the inner sleeve 141 and the outer sleeve 142 . The inner sleeve 141 and the outer sleeve 142 are joined together by riveting, and the shielding layer 153 is interposed therein, so that the inner sleeve 141 , the outer sleeve 142 and the shielding layer 153 are electrically connected.

The inner sleeve 141 has a channel 1412 penetrating in the axial direction, and the central conductive member 11 and the insulating seat 12 are accommodated in the channel 1412 . The inner sleeve 141 is provided with two stoppers 1414 that protrude into the channel 1412, and the two stoppers 1414 respectively abut against the steps 126 of the insulating seat 12 to constrain the insulating seat 12 axially and prevent the insulating seat from 12 is shifted axially downward.

The lower end of the inner sleeve 141 expands slightly outward to form a trumpet-shaped guide portion 1413 , so as to guide it to the mating female end connector 40 , so that the female end connector 40 can be easily inserted into the inner sleeve 141 through the guide portion 1413 .

The inner sleeve 141 also has a first riveting portion 1411. The first riveting portion 1411 is preferably cylindrical, which can be a cylinder, a square tube or a polygonal tube. A plurality of first grooves 1415 extending along the circumferential direction are recessed on the outer surface of the first riveting portion 1411 .

The metal shell 14 also includes a reinforcement ring 143 disposed in the inner sleeve 141 , the reinforcement ring 143 is sleeved outside the socket portion 122 of the insulating base 12 and is tightly attached to the inner wall of the first riveting portion 1411 . The reinforcing ring 143 and the limiting portion 1414 on the inner sleeve 141 form an axial limit for the insulating base 12 from the upper and lower positions of the insulating base 12 respectively, so as to prevent the insulating base 12 from axially shifting relative to the metal shell 14 .

The outer sleeve 142 includes: a second crimping portion 1421 , a conductive contact portion 1422 formed on the lower end of the second crimping portion 1421 , and a limiting ring 1423 and a boss 1424 formed on the upper end of the second crimping portion 1421 . The first crimping portion 1411 is preferably in a cylindrical shape, which can be a cylinder, a square tube or a polygonal tube.

The second riveting portion 1421 of the outer sleeve 142 is sleeved outside the first riveting portion 1411 of the inner sleeve 141, and the inner wall of the second riveting portion 1421 is recessed with a plurality of second riveting extending along the circumferential direction. groove. The shielding layer 153 of the cable 15 is interposed between the first crimping portion 1411 and the second crimping portion 1421 of the inner sleeve 141 and the outer sleeve 142 . The first riveting portion 1411 and the second riveting portion 1421 are combined together through riveting, and the first groove 1415 on the opposite surface of the two forms a dislocation engagement with the second groove, thereby enhancing the holding force between them. The shielding layer 153 is securely held between the inner sleeve 141 and the outer sleeve 142 .

It is worth mentioning that, in other embodiments, the grooves used to improve the holding force between the inner sleeve 141 and the outer sleeve 142 can also be replaced with ribs, or a combination of ribs and grooves.

The reinforcing ring 143 in the inner sleeve 141 provides radial support for the first riveting portion 1411 of the inner sleeve 141, so that the first riveting portion 1411 and the second riveting portion 1421 are connected more tightly by riveting, thereby further This further improves the holding force between the inner sleeve 141 and the outer sleeve 142.

The conductive contact portion 1422 is preferably cylindrical, and has an outer wall surface that protrudes relative to the second riveting portion 1421. The metal shell 14 realizes floating contact with the floating contact piece 22 in the mounting seat 20 through the outer wall surface (see FIG. 3 ).

The limit ring 1423 is arranged at the position close to the upper end of the outer sleeve 142 and protrudes outward along the radial direction of the outer sleeve 142. The limit ring 1423 and the boss 1424 on the upper end of the outer sleeve 142 constitute a mounting for installing the locking cover 17. structure.

Referring to FIG. 6 , FIG. 10 and FIG. 15 , the locking cover 17 includes: a cover body 171 , a sealing ring 172 disposed on the lower surface of the cover body 171 , and a sealant 173 sealed between the cover body 171 and the cable 15 .

The cover body 171 includes: a cover portion 1711 , an elastic arm portion 1712 extending downward from an outer edge of the cover portion 1711 , and a fixing ring 1713 formed inside the elastic arm portion 1712 .

The fixed ring 1713 is provided with a channel 1717 for the cable 15 to pass through. The lower end of the fixed ring 1713 is against the limit ring 1423 of the inner sleeve 141 of the metal shell 14, and the inner side is against the boss at the upper end of the inner sleeve 141. 1424 places.

The sealant 173 is set in the channel 1717 to seal the gap between the fixing ring 1713 and the cable 15 and between the boss 1424 and the cable 15, preventing moisture from entering the male terminal connection through the gap between the cable 15 and the locking cover 17 At the same time, the sealant 173 also bonds the fixing ring 1713 and the metal shell 14 together to prevent moisture from entering the inside of the male connector 10 through the gap between the metal shell 14 and the locking cover 17 .

The elastic arm portion 1712 surrounds the outer side of the metal shell 14 and forms an insertion channel 1718 with the metal shell 14. The insertion channel 1718 is used for inserting the docking post 212 of the installation shell 21 (as shown in FIG. 3 shown). An inserting slot 1716 is formed between the fixing ring 1713 and the elastic arm portion 1712 , and the inserting slot 1716 communicates with the inserting channel 1718 , and a sealing ring 172 is disposed in the inserting slot 1716 . The upper end of the docking post 212 of the installation shell 21 is inserted into the insertion slot 1716 through the insertion channel 1718 and presses the sealing ring 172 to prevent moisture from entering the male connector 10 through the gap between the installation shell 21 and the locking cover 17 .

The elastic arm portion 1712 is provided with at least one limiter hole 1714, and the elastic arm portion 1712 is also provided with at least one guide groove 1715 extending upward from the lower end of the elastic arm portion 1712. The limiter hole 1714 and the guide groove 1715 are used to communicate with The docking posts 212 of the installation housing 21 cooperate to realize the docking and locking of the two.

Referring to FIG. 8 , FIG. 16 and FIG. 17 , the mounting base 20 includes: an insulating mounting shell 21 , and a conductive floating contact 22 and a shielding case 23 installed in the mounting shell 21 .

The installation housing 21 includes: a housing body 211 and a pair of abutment posts 212 protruding upward from the housing body 211 .

The housing body 211 includes: four side walls 2111 surrounding the housing body 211 and a top wall 2112 on the top of the four side walls 2111 . The four side walls 2111 and the top wall 2112 enclose a receiving chamber 2114 with an open bottom. A locking hole 2113 for installing the shielding case 23 is disposed on the side wall 2111 .

The mating post 212 is disposed on the top wall 2112 for mating connection with the male connector 10 . A mounting channel 2123 for inserting the male end connector 10 is formed through the mating post 212 along the vertical direction. At least one limiting protrusion 2121 and at least one guiding rib 2122 protruding outward are also provided on the docking post 212 .

Referring to FIG. 1 , when the male connector 10 is inserted into the docking post 212 , the limiting protrusion 2121 extends into the limiting hole 1714 of the locking cover 17 of the male connector 10 to lock the two. guide rib 2122 with The guide groove 1715 on the locking cover 17 cooperates to provide guiding positioning for the plug-in connection between the two.

3 and 8, the mounting channel 2123 of the docking column 212 is also provided with a positioning groove 2124, when the male connector 10 is inserted into the docking column 212, the stop ring 1423 on the upper end of the metal shell 14 of the male connector 10 is limited. Located in the positioning groove 2124 to prevent the metal shell 14 from displacing downward along the installation channel 2123 , at the same time, the fixing ring 1713 above the limiting ring 1423 is locked on the docking column 212 through the elastic arm portion 1712 of the locking cover 17 Therefore, the fixing ring 1713 and the positioning groove 2124 define the upper and lower positions of the limiting ring 1423 respectively, so as to ensure that the upper end of the male connector 10 is fixed relative to the installation shell 21, while the lower end of the male connector 10 passes through The floating contact 22 realizes horizontal floating (described in detail below).

Referring to FIG. 8 , FIG. 16 and FIG. 17 , the floating contact 22 is disposed in the installation channel 2123 of the docking post 212 .

The floating contact 22 includes: a cylinder body 221 and a plurality of conductive protrusions 222 extending radially outward from the lower end of the cylinder body 221 . A receiving channel 223 is formed in the cylinder body 221 , and a plurality of slits 225 are formed on the cylinder body 221 , and an elastic contact piece 224 protruding and extending into the receiving channel 223 is formed at each slit 225 . The elastic contact piece 224 is formed by bending a partial area of the barrel 221 at the opening 225 into the receiving channel 223 in a torn shape. The elastic contact pieces 224 are distributed at intervals in the circumferential direction of the cylinder 221 , and preferably evenly distributed, and the lower end of each elastic contact piece 224 is a free end that can elastically swing.

Referring to FIG. 3 and FIG. 6 together, when the male connector 10 is inserted on the docking column 212, the metal shell 14 of the male connector 10 is inserted into the receiving channel 223 of the floating contact 22 through the installation channel 2123 of the docking column 212 Each elastic contact piece 224 on the floating contact piece 22 elastically contacts the conductive contact portion 1422 of the outer sleeve 142 of the metal shell 14, so that the lower end of the male end connector 10 can be installed horizontally and floatingly on the installation surface. In the housing 21. Therefore, when the male connector 10 and the female connector 40 are axially misaligned due to manufacturing tolerances, the male connector 10 can realize horizontal floating through the floating contact member 22 , and then smoothly dock with the female connector 40 .

Referring to FIG. 16 and FIG. 17 , the shielding case 23 includes: a case top wall 231 and four case side walls 232 formed by bending and extending downwards around the case top wall 231 . The top wall 231 of the cover is provided with an opening 235 and a protruding edge 234 surrounding the opening 235 and protruding upward. The cover top wall 231 and the cover side wall 232 enclose a shielding cavity 236 with an open bottom, and the opening 235 communicates with the shielding cavity 236 . The lower end of the metal shell 14 can protrude into the shielding cavity 236 through the opening 235 . At least one buckle 233 protruding outward is disposed on the side wall 232 of the cover.

3 and 8, the shielding case 23 is installed in the housing cavity 2114 of the housing body 211, the top wall 231 of the shielding case 23 is against the positioning protrusion 2115 in the inner cavity of the housing body 211, and the lower end of the shielding case 23 penetrates The buckle 233 is locked into the hole 2113 on the side wall 2111 of the shell body 211 . The protruding edge 234 on the upper end of the shield 23 extends into the receiving channel 223 of the floating contact 22, and the plurality of conductive protrusions 222 on the floating contact 22 extend out of the installation channel 2123 and elastically contact the top wall 231 of the shield 23, Therefore, the metal shell 14 of the male end connector 10 can realize primary grounding through the contact between the floating contact piece 22 and the shield cover 23 on the one hand, and on the other hand can also pass through the inner sleeve 141 at the lower end of the metal shell 14 and the female end connector. 40 in contact with the docking housing 43 to achieve secondary grounding. Therefore, the overall grounding performance of the electrical connector assembly 1000 is improved, electromagnetic wave interference or noise interference generated during high-frequency signal transmission is improved, and the performance of high-frequency signal transmission is improved.

3 and 4, the male connector 10 is detachably locked on the docking column 212 of the mounting base 20, and the electrical connector assembly 100 assembled by the two can be matched with the female connector 40 when in use. An electrical connector assembly 1000 is assembled. At this time, the metal shell 14 of the male end connector 10 is inserted into the docking post 212 In the floating contact piece 22, the elastic contact piece 224 on the floating contact piece 22 elastically contacts the metal shell 14, so that the lower end of the male end connector 10 can swing in the receiving channel 223 of the floating contact piece 22, so that it can be well The ground conforms to the assembly tolerance between the female end connector 40, so that the male end connector 10 and the female end connector 40 can be docked smoothly, and can also withstand the interference of environmental factors such as vibration, ensuring that the two can also maintain their stability in the vibration environment. Reliable contact to ensure normal operation. In addition, since the locking cover 17 on the electrical connector assembly 100 is detachably locked on the docking column 212, when the male connector 10 is damaged, the male connector 10 can be pulled out separately for replacement, thereby Maintenance costs are saved. Moreover, since the sealing ring 172 that seals the gap between the locking cover 17 and the docking column 212 is provided at the docking position, therefore, even if the locking cover 17 is a detachable structure, it can still ensure that the locking cover 17 and the installation shell The tightness between 21 prevents moisture from entering the interior of the installation housing 21 through the locking cover 17 and affecting the electrical performance of the electronic equipment connected to the installation housing 21 .

Referring to FIG. 18 to FIG. 26 , they are the electrical connector assembly 200 of the second embodiment.

The electrical connector assembly 200 of the second embodiment also includes: a mounting base 20 and a male connector 30 detachably inserted into the mounting base 20 .

Referring to Fig. 21, the structure of the mounting base 20 is the same as the structure of the mounting base 20 in the electrical connector assembly 100 of the first embodiment above, and it also includes: an insulating mounting shell 21 and a conductive conductor installed in the mounting shell 21 The floating contact 22 and the shield 23. For the specific structures of the installation housing 21 , the floating contact 22 and the shielding case 23 , please refer to the electrical connector assembly 100 of the above-mentioned first embodiment, which will not be repeated here.

Referring to Fig. 22 to Fig. 26, the male end connector 30 includes: a central conductive part 31, an insulating seat 32 for inserting the central conductive part 31 thereon, a metal shell 34 sleeved outside the insulating seat 32 and mounting A locking cover 37 outside the metal shell 34.

Referring to Fig. 20 and Fig. 23, the central conductive member 31 is a floating pin, which includes a fixed contact 312 and a floating contact 311 at least partially coaxially nested together, and a spring is provided between the fixed contact 312 and the floating contact 311. A member 314 (in this embodiment, the elastic member 314 is a spring), the elastic member 314 enables the floating contact 311 to move up and down relative to the fixed contact 312 .

The center of the fixed contact 312 is provided with a through hole, and the core wire 151 of the cable 35 is inserted into the through hole and fixedly connected with the fixed contact 312 . The outer periphery of the fixed contact 312 is provided with a locking groove 3121, and an annular protrusion is formed on the inner wall of the insulating seat 32. When the central conductive member 31 is inserted into the locking groove 3121, the annular protrusion extends into the locking groove 3121 so that the two are relatively fixed.

The outer periphery of the fixed contact 312 is also covered with an elastic sleeve 313, one end of the elastic sleeve 313 is connected to the fixed contact 312, and the other end is formed with a plurality of claws 3131 that elastically contact the floating contact 311, and the claws 3131 The free end is bent toward the floating contact 311 to form a resilient contact finger 3132 . The elastic contact finger 3132 is used to contact the floating contact 311 to form an auxiliary contact, so as to improve the performance of the floating pin for transmitting high-frequency signals.

Referring to FIG. 24 , the insulating seat 32 includes a seat body 321 . A through hole 323 is opened in the seat body 321 along the axial direction for inserting the central conductive member 31 therein. The seat body 321 defines a limiting groove 322 around the outer periphery.

Referring to FIG. 20 and FIG. 22 , the metal shell 34 includes: an inner sleeve 341 and an outer sleeve 342 nested in each other, and a reinforcing ring 343 disposed in the inner sleeve 341 .

The insulating seat 32 and the central conductive member 31 are accommodated in the inner sleeve 341 , and an interlayer for accommodating the shielding layer 353 of the cable 35 is formed between the inner sleeve 341 and the outer sleeve 342 . The inner sleeve 341 and the outer sleeve 342 are combined together by riveting, and the shielding layer 353 is sandwiched therein, so that the inner sleeve 341, the outer sleeve 342 and the The shielding layer 353 implements electrical connection.

The inner sleeve 341 has a channel 3412 penetrating in the axial direction, and the central conductive member 31 and the insulating seat 32 are accommodated in the channel 3412 . The inner sleeve 341 is provided with two buckles 3414 that protrude toward the passage 3412, and the two buckles 3414 respectively extend into the limiting grooves 322 of the insulating seat 32 (see Figure 24), so as to fix the insulating seat 32 on the inner sleeve 341 in.

Referring to FIG. 21 and FIG. 22 together, the inner sleeve 341 includes a floating portion 3410 that at least partially protrudes downward from the outer sleeve 342 . The floating portion 3410 is cylindrical and has a plurality of slits 3415 extending to the lower end of the floating portion 3410 . A plurality of slits 3415 are distributed along the circumference of the floating part 3410 at intervals, and a floating elastic arm 3419 is formed between two adjacent slits 3415 .

Specifically, the inner sleeve 341 includes: a first straight portion 3411, a second straight portion 3413 extending downward from the first straight portion 3411, a second straight portion 3413 extending downward with a tapered diameter. The tapered barrel portion 3417 and a guide portion 3418 formed by extending downwards from the tapered barrel portion 3417 is slightly expanded in diameter.

The buckle 3414 is disposed on the first straight portion 3411 , and a plurality of first grooves 3416 extending along the circumferential direction are recessed on the outer surface of the first straight portion 3411 . The diameter of the second straight portion 3413 is slightly larger than that of the first straight portion 3411 , and the slit 3415 extends from the lower end of the guiding portion 3418 to the second straight portion 3413 . The trumpet-shaped opening formed by the guiding portion 3418 facilitates smooth docking with the female connector.

The outer sleeve 342 includes: a cylindrical crimping portion 3421 , a conductive contact portion 3422 formed at the lower end of the crimping portion 3421 , and a limiting ring 3423 and a boss 3424 formed at the upper end of the crimping portion 3421 .

The riveting portion 3421 of the outer sleeve 342 is sleeved on the outside of the first straight portion 3411 of the inner sleeve 341 , and the inner wall of the riveting portion 3421 is recessed with a plurality of second grooves extending along the circumferential direction. Shielding of cable 35 353 is sandwiched between the first straight portion 3411 and the riveted portion 3421, and the two are combined through riveting. The first groove 3416 on the opposite surface of the two forms a dislocation engagement with the second groove, which enhances the holding force between them, and is beneficial to reliably retain the shielding layer 353 between the inner sleeve 341 and the outer sleeve 342 .

The conductive contact portion 3422 is cylindrical, which is sleeved on the first straight portion 3411 and extends downward to the outside of the second straight portion 3413 . The conductive contact portion 3422 has a protruding outer wall surface relative to the riveting portion 3421 , so as to realize floating contact with the floating contact member 22 in the mounting seat 20 through the outer wall surface.

Same as the electrical connector assembly of the first embodiment above, the limiting ring 3423 and the boss 3424 are used to cooperate with the locking cover 37 to realize the sealing connection between the locking cover 37 and the metal shell 34 .

The reinforcement ring 343 is sleeved on the outside of the insulating base 32 and accommodated in the inner sleeve 341 together with the insulating base 32 and the central conductive member 31 . The reinforcement ring 343 clings to the inner wall of the first straight portion 3411 of the inner sleeve 341, providing radial support for the first straight portion 3411 of the inner sleeve 341, so that the first straight portion 3411 and the riveting portion 3421 are more closely connected. Riveted together, thereby improving the holding force between the inner sleeve 341 and the outer sleeve 342 .

Referring to FIG. 20 , FIG. 21 and FIG. 26 , the locking cover 37 includes: a cover body 371 , a sealing ring 372 disposed on the lower surface of the cover body 371 , and a sealing ring 373 sealed between the cover body 371 and the cable 35 .

The cover body 371 includes: a cover portion 3711 , an elastic arm portion 3712 extending downward from the outer edge of the cover portion 3711 , and a fixing ring 3713 disposed inside the elastic arm portion 3712 and connected to the cover portion 3711 .

At least one limiter hole 3714 is provided on the elastic arm portion 3712, and at least one guide groove 3715 extending upward from the lower end of the elastic arm portion 3712 is provided on the elastic arm portion 3712, and the limiter hole 3714 is used for connecting with the installation housing 21 The limit protrusion 2121 on the docking column 212 cooperates to realize the docking and locking of the two, and the guide groove 3715 is used to cooperate with the guide rib 2122 on the docking column 212 to provide guidance for the docking of the two.

The fixing ring 3713 is provided with a channel 3716 for passing the cable 35 therein, and the cover portion 3711 extends toward the channel 3716 to form a cover edge 3717 . Between the fixing ring 3713 and the outer insulating layer 354 of the cable 35, a narrow slit 3718 located below the cover edge 3717 is formed, and the sealing ring 373 is arranged at the narrow slit 3718 to seal the gap between the cable 35 and the locking cover 37 to prevent External moisture enters the male connector 30 .

An inserting groove 3719 is formed between the fixing ring 3713 and the elastic arm portion 3712 , and the sealing ring 372 is disposed in the inserting groove 3719 and tightly attached to the cover portion 3711 . The docking column 212 of the installation housing 21 is inserted into the insertion groove 3719 and presses the sealing ring 372, thereby forming a seal between the locking cover 37 and the installation housing 21, preventing moisture from passing through the installation housing 21 and the locking cover 37 The gap between them enters the male end connector 30.

In the electrical connector assembly 200 in the second embodiment, since the central conductive member 31 is a floating pin capable of floating up and down, and the lower end of the inner sleeve 341 of the metal shell 34 has a floating elastic arm 3419, even if the Manufacturing assembly tolerances lead to misalignment of the electrical connector assembly 200 and the female connector in the axial and radial directions, and the electrical connector assembly 200 can still smoothly connect to the female connector through the floating structure of the central conductive member 31 and the elastic arm 3419 . Make sure that the two are connected reliably.

It is worth mentioning that there is only one central conductive member in the male connector in the above two embodiments, and in other embodiments, there may be multiple central conductive members, such as two, four or six, Each central conductive piece is passed through the insulating seat and accommodated together with the insulating seat in the metal shell.

The above embodiments of the electrical connector assembly are just examples, and the structures of the various parts of the electrical connector assembly are not fixedly matched and combined. In the absence of structural conflicts, the structures of each part of the various embodiments of the electrical connector assembly can be random combination.

The above content is only a preferred embodiment of the present model, and is not intended to limit the implementation of the present model. Those skilled in the art can easily make corresponding adaptations or modifications according to the main concept and spirit of the present model. Therefore, the present model The scope of protection should be based on the scope of protection applied for in the scope of the patent application.

1000: electrical connector combination

11: Central conductive part

12: Insulation seat

14: metal shell

141: inner sleeve

1422: conductive contact part

1423: limit ring

143: Strengthening ring

151: core wire

152: inner insulating layer

153: shielding layer

154: Outer insulating layer

1713: Fixed ring

172: sealing ring

173: sealant

211: shell body

212: Butt column

2121: limit protrusion

2124: positioning slot

22: floating contact

222: conductive protrusion

223: Containment channel

224: elastic contact piece

23: shielding cover

231: cover top wall

40: Female connector

41: Central conductive terminal

411: Solder tail

42: Insulation seat

43: docking shell

50: circuit board

Claims (16)

An electrical connector assembly comprising: A male end connector, comprising: an insulating seat, at least one central conductive member fixed in the insulating seat, a metal shell sleeved on the outside of the insulating seat and a locking device installed on the outside of the metal shell cover; and, A mounting seat, including an insulating mounting shell and a conductive floating contact arranged in the mounting shells, the mounting shells have a pair of butt posts protruding upwards, and the interior of the butt posts is along the up and down direction An installation channel is opened through, and the floating contacts are arranged in the installation channels, and a receiving channel is formed in the floating contacts, and there are a plurality of elastic contact pieces protruding into the receiving channels; The male connectors are inserted into the mounting seats, the locking covers are detachably locked on the docking columns, the metal shells are inserted into the receiving channels and can swing in the receiving channels, The elastic contact pieces elastically contact the metal shells. The electrical connector assembly as claimed in claim 1, wherein the central conductive parts include a central pin base and a central pin connector inserted on the central pin base, and the central pin bases include a tubular The butt ends and the riveting ends integrally extended upwards from the butt ends, the butt ends are sleeved on the center pin joints. The electrical connector assembly as described in claim 2, wherein, the upper ends of the centers of the joints are provided with insertion parts for insertion into the butt ends, the insertion parts are provided with card slots, and the butt ends are Buckles extending into the slots are provided. The electrical connector assembly according to claim 1, wherein the locking covers are provided with fixing rings sleeved on the upper ends of the metal shells and elastic arms located outside the fixing rings, and the elastic arms An insertion channel for inserting the butt posts is formed around the outside of the metal shells and between the metal shells, and an insertion channel communicating with the insertion channels is formed between the fixing rings and the elastic arms. Groove, the sealing ring is arranged in these insertion grooves. The electrical connector assembly as claimed in claim 4, wherein the positions of the metal shells near the upper ends protrude radially outward to form a limiting ring, and the lower ends of the fixing rings abut against the limiting rings, the Channels for the cables to pass through are arranged inside the fixing rings, and seals are arranged between the fixing rings and the cables. The electrical connector assembly as claimed in claim 5, wherein the locking covers further include cover parts connected to the fixing rings and the elastic arms, and the cover parts are inserted into the channels of the fixing rings Extending to form a cover edge, a slit below the cover rim is formed between the fixing rings and the cables, the seals include sealing rings, and the sealing rings are arranged at the slit. The electrical connector assembly as claimed in claim 4, wherein at least one limiting hole is provided on the elastic arms of the locking covers, and at least one limiting protrusion protruding outward is provided on the butting posts, The position-limiting protrusions are snapped into the position-limiting holes; the elastic arms of the locking covers are provided with at least one guide groove extending upward from the lower ends of the elastic arms; The guide ribs are inserted into the guide grooves. The electrical connector assembly as claimed in claim 1, wherein the metal shells include inner sleeves and outer sleeves that fit into each other, and the insulating seats and the central conductive members are accommodated in the inner sleeves, An interlayer for containing the cable shielding layer is formed between the inner sleeves and the outer sleeves. The electrical connector assembly according to claim 8, wherein the inner sleeves have first crimping portions, and the outer sleeves have second crimping portions sleeved on the outer walls of the first crimping portions , the first riveting parts are provided with reinforcing rings that are close to the inner walls of the first riveting parts, and the first riveting parts and the second riveting parts are combined through riveting. The electrical connector assembly as claimed in claim 9, wherein the opposite wall surfaces of the first crimping parts and the second crimping parts are respectively provided with a plurality of grooves or ribs. The electrical connector assembly as claimed in claim 8, wherein the central conductive members are floating pins, the inner sleeves include floating portions at least partially protruding downward from the outer sleeves, and the floating portions are in the form of Cylindrical, with a plurality of slits extending to the lower ends of the floating parts, a plurality of slits are distributed along the circumference of the floating parts at intervals, and a floating elastic arm is formed between two adjacent slits . The electrical connector assembly as claimed in claim 11, wherein the inner sleeves comprise: a first straight portion, a second straight portion extending downward from the first straight portion, and a downward and tapered portion from the second straight portion The tapered barrel part with extended diameter, the tapered barrel parts extend downward slightly to expand the diameter to form the leading part. The electrical connector assembly as claimed in item 11, wherein the floating pins include fixed contacts and floating contacts that can move up and down relative to the fixed contacts, and the fixed contacts are arranged between the floating contacts There are elastic parts, and the outer circumference of the fixed contacts is also covered with elastic sleeves. One end of the elastic sleeves is connected with the fixed contacts, and the other end is formed with a plurality of clips that elastically contact the floating contacts. claw. The electrical connector assembly according to claim 1, wherein the floating contacts include a cylinder and a plurality of conductive protrusions extending radially outward from the lower end of the cylinder, and the lower parts of the mounting housings have The accommodating cavities connected to the installation channels, the accommodating cavities are provided with shielding covers, the cylinders are installed in the installation channels, the conductive protrusions protrude from the installation channels and contact the shielding covers . The electrical connector assembly as claimed in claim 14, wherein the cylinders are torn and deflected into the receiving passages to form the elastic contact pieces, and each of the elastic contact pieces is on the circumference of the cylinders. distributed across intervals. The electrical connector assembly according to claim 14, wherein a shielding cavity is formed in the shielding covers, openings communicating with the shielding cavity are provided on the shielding covers, and the lower ends of the metal shells protrude into these shielded cavities.

Images