CN108321573A

CN108321573A - Adapter

Info

Publication number: CN108321573A
Application number: CN201711349008.9A
Authority: CN
Inventors: 秦大争; 邹小乐
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2017-12-15
Filing date: 2017-12-15
Publication date: 2018-07-24
Anticipated expiration: 2037-12-15
Also published as: CN108321573B

Abstract

The invention discloses a kind of adapter, including one first connector and one second connector that is electrically connected positioned at first connector rear and with first connector, including：There is first connector the first noumenon, one first ground terminal to be immobilizated in the first noumenon；There is second connector one second ontology, one second ground terminal and a shield terminal to be immobilizated in second ontology, and first ground terminal, second ground terminal and the shield terminal three are in direct contact；So that the adapter is not necessarily to that the terminal of terminal and second connector that PCBA board connects first connector is arranged, reduces the number of parts of the adapter, be conducive to the miniaturization of the adapter, reduce the production cost of the adapter.

Description

Adapter

Technical field

The present invention relates to a kind of adapter more particularly to a kind of one first connector is forwarded to the one second of different size The single-piece adapter of connector.

Background technology

Application No. is the Chinese patents of CN201520527035.0, disclose a kind of 2.0 female seat of ultrashort micro USB turn The adapter of USB3.1PCBA integral types comprising shell, the cavity of the shell formation is interior to be equipped with PCBA board, the shell One end is equipped with USB2.0 female end interfaces, and the other end of shell is equipped with USB3.1 male end connectors, and the USB2.0 female ends interface includes USB2.0 female ends ontology, USB2.0 terminal groups, the USB3.1 male ends connector include USB3.1 male ends ontology, USB3.1 terminals Group, the USB2.0 female ends ontology are connected to the PCBA board, the USB3.1 male ends ontology by the USB2.0 terminal groups It is connected to the PCBA board by the USB3.1 terminal groups, the switching of USB2.0 female ends and USB3.1 male ends is realized with this.

However, this kind of adapter at least has the following disadvantages：The USB2.0 female ends terminal group by the PCBA board with The USB3.1 male terminals group is electrically connected, and causes the adapter part more, complicated, does not meet the adapter Miniaturization trend；In addition, the electrical transmission path of this switching joint terminal is farther out, the mistake of signals transmission is easily caused Very, it is unfavorable for improving the product quality of the adapter.

It is therefore desirable to design a kind of electric connector of improvement, to overcome the above problem.

Invention content

For background technology problem encountered, the purpose of the present invention is to provide a kind of USB2.0 terminals and USB The miniaturization adapter that Type-C terminals are directly welded and fixed.

To achieve the above object, the present invention uses following technological means：A kind of adapter, including one first connector and position In first connector rear and with first connector be electrically connected one second connector, including：Described first connects Connecing utensil has a first noumenon, one first ground terminal to be immobilizated in the first noumenon；Second connector has one second Ontology, one second ground terminal and a shield terminal are immobilizated in second ontology, and first ground terminal, described second connect Ground terminal and the shield terminal three are in direct contact；

Further, there is first ground terminal one first weld part to be revealed in the first noumenon, second ground terminal Son is revealed in second ontology with one second weld part and the shield terminal is revealed in described second with a pin Ontology, first weld part, second weld part and the pin three are in tabular and to be welded and fixed, and described the Two welding positions are between first weld part and the pin；

Further, there is first ground terminal flat 1 first weld part to be revealed in the first noumenon, and described the One first notch of recessed formation, second ground terminal have flat 1 second welding to the back edge of one weld part forward Portion is revealed in second ontology, and the leading edge of second weld part, one second notch of recessed formation backward, described first lacks Mouth is located at the top of second notch and the floor projection of first notch and second notch is least partially overlapped；

Further, there is the shield terminal a flat pin to be revealed in second ontology, and the pin is located at described The lower section of second notch, and the surface open of the pin is in first notch and second notch；

Further, a solder flows into the pin surface by first notch and second notch, makes first weldering Socket part, second weld part and the pin securely weld；

Further, first connector have at least one first power supply terminal and at least one first signal terminal, described second Connector has an at least second source terminal and an at least second signal terminal, first power supply terminal and second electricity Source terminal correspondence is welded and fixed, and first signal terminal is corresponding with the second signal terminal to be welded and fixed；

Further, there is each first signal terminal one first welding foot to extend the first noumenon, and each described the There is binary signal terminal one second leg to extend second ontology, and each first welding foot correspondence is welded in described in one Second welding foot, the second source terminal are two and are symmetrical set in second ontology, the second signal end Son is between the two second source terminals, an interconnecting piece, connects the two second source terminals, the connecting portion is in institute State the underface of the first welding foot and second welding foot；

Further, there is first power supply terminal one first tail portion to be revealed in the first noumenon, the two second source ends Son is tuning-fork type structure, and laterally bending extends to form one second tail portion to the interconnecting piece, and second tail portion is welded in described First tail portion；

Further, second ground terminal is tuning-fork type terminal structure and is two and is symmetrical set in described second Body, a bridge part connect two second ground terminals, an at least abutting part are extended rearwardly to form from the bridge part, described Second ontology corresponds to the abutting part and forms an at least recess, and a shielding case is arranged second ontology, and the abutting part passes through The recess abuts the shielding case；

Further, there is second connector inspection terminal, the inspection terminal to connect described the by a resistance Two ground terminals；

Further, first connector meets the plug specification of USB2.0, in it is transversely arranged on the first noumenon be one First power supply terminal, two the first signal terminals and first ground terminal, second connector meet USB Type-C socket specifications, in it is transversely arranged on second ontology be second ground terminal, a second source terminal, Two second signal terminals, an inspection terminal, a second source terminal, second ground terminal；

Another technical solution is：

A kind of adapter, including one first connector and one second connector with first connector electric connection, including： There is first connector the first noumenon, one first ground terminal to be immobilizated in the first noumenon；Second connector With one second ontology, at least one second ground terminal and an at least shield terminal are immobilizated in second ontology, and described second Ground terminal electrically conducts with the shield terminal, and second ground terminal or the shield terminal are grounded with described first Terminal is in direct contact；

Further, each terminal in first connector is respectively formed one first notch, and each described first in its tail end Notch corresponds to the top for each terminal being located in second connector；

Further, second ground terminal and the shield terminal are that metal plate is stamped and formed out, second ground terminal In being vertically arranged, the plate emargination of the second ground terminal tail end sets to form an opening plate face of son, described in the opening clamping The plate face of shield terminal；

Further, two internal faces up and down of the opening protrude out to form a convex thorn respectively, and the two convex thorns abut the screen respectively Cover two surface up and down of terminal；

Further, second ground terminal is tuning-fork type terminal structure and is two and is symmetrical set in described second Ontology, a bridge part connect two second ground terminals, two abutting parts are extended rearwardly to form from the bridge part, described Second ontology corresponds to two abutting parts and forms two recesses, and a shielding case is arranged second ontology, each abutting part Corresponding to abut the shielding case across a recess, second connector includes two signal terminals being disposed adjacent, And two the signal terminal between two abutting parts；

Further, second connector further includes two two second source terminals in tuning fork structure, an inspection terminal position Between second ground terminal and a second source terminal, the inspection terminal passes through described in resistance connection Second ground terminal；

Further, first connector meets the plug specification of USB2.0, in it is transversely arranged on the first noumenon be one First power supply terminal, two the first signal terminals and first ground terminal, second connector meet USB Type-C socket specifications, in it is transversely arranged on second ontology be second ground terminal, a second source terminal, Two second signal terminals, an inspection terminal, a second source terminal, second ground terminal.

Compared with prior art, the invention has the advantages that：

First ground terminal, second ground terminal and the shield terminal three are in direct contact, first connection The terminal of device and second connector directly electrically conducts, and the adapter is made to connect it is not necessary that PCBA board connection described first is arranged The terminal for connecing the terminal and second connector of device, reduces the number of parts of the adapter, is conducive to the adapter Miniaturization, reduces the production cost of the adapter；In addition, the terminal of first connector be directly fixedly welded on it is described The terminal of second connector, also shortens signal transmission path, is conducive to improve the quality of the adapter.

【Description of the drawings】

Fig. 1 is the first connector and the preceding stereogram of the second connector welding in adapter of the present invention；

Fig. 2 is adapter stereogram of the present invention；

Fig. 3 is the second connector body portion stereogram exploded view in adapter of the present invention；

Fig. 4 is the second connector stereogram exploded view in adapter of the present invention；

Fig. 5 is adapter terminal stereoscopic schematic diagram of the present invention；

Fig. 6 is adapter terminal vertical view of the present invention；

Fig. 7 is the first connector stereogram exploded view in adapter of the present invention；

Fig. 8 adapters of the present invention are along line A-A sectional view；

Fig. 9 is adapter of the present invention along line B-B sectional view.

The drawing reference numeral explanation of specific implementation mode：

Adapter 100	First connector 200	The first noumenon 1	First base portion 11
				Hyoplastron 12	Rear cover 13	First end subgroup 2	First notch 201
First ground terminal 21	First weld part 211	First signal terminal 22	First welding foot 221
				First power supply terminal 23	First tail portion 231	Metal-back 3	Plastic casing 4
Second connector 300	Second ontology 5	Second base portion 51	Recess 511
				Docking section 52	Butt cavity 521	Shield terminal 6	Holding parts 61
Latch portion 62	Pin 63	Second end subgroup 7	Second ground terminal 71
				Second weld part 711	Bridge part 712	Abutting part 713	Second notch 714
Opening 715	Convex thorn 716	Second signal terminal 72	Second welding foot 721
				Second source terminal 73	Second tail portion 731	Interconnecting piece 732	Inspection terminal 74
Ground strip 8	Shrapnel 81	Shielding case 9	Solder C
				Resistance D

【Specific implementation mode】

Purpose, structure, feature and effect to facilitate the understanding of the present invention etc., in conjunction with the drawings and specific embodiments The invention will be further described.

As depicted in figs. 1 and 2, adapter 100 of the present invention including one first connector 200 and is located at first connector 200 rears and one second connector 300 being electrically connected with first connector 200, in the present embodiment, first connection Device 200 is the pin connector for meeting USB2.0 specifications, and second connector 300 is meet USB Type-C specifications one Socket connector, in other embodiments, first connector 200 and second connector 300 can be other arbitrary Plug, the socket of type are not limited herein as long as the two can electrically conduct.

As shown in fig. 7, there is first connector 200 the first noumenon 1, the first noumenon 1 to have one first base Portion 11, the hyoplastron 12 extended to form forward from first base portion 11 and the rear cover for being assembled in first base portion 11 13；One first end subgroup 2 is immobilizated in first base portion 11 in a row and is revealed in the hyoplastron 12；One metal-back 3, is arranged institute State the first noumenon 1；One plastic casing 4, coats the metal-back 3.

As shown in Figures 5 to 7, the first end subgroup 2 is respectively first ground terminal 21, two pieces the from left to right One signal terminal 22 and first power supply terminal 23.There is first ground terminal 21 one first weld part 211 to be revealed in There is one first welding foot 221 to be revealed in first base portion 11 for first base portion 11, each first signal terminal 22 And there is first power supply terminal 23 one first tail portion 231 to be revealed in first base portion 11, it is in the present embodiment, described All terminals in first end subgroup 2 are metallic plate punching formation and their shape size is completely the same, therefore described First weld part 211, first welding foot 221 and first tail portion 231 be in tabular, and its three's back edge to Preceding recessed formation forms one first notch 201.In other embodiments, the shape of the different terminals in the first end subgroup 2 It can arbitrarily be allocated according to actual demand, be not limited herein.

As shown in figure 4, there is second connector 300 one second ontology 5, two shield terminals 6 to be immobilizated in institute respectively The two lateral walls of the second ontology 5 are stated, it is solid respectively that a second end subgroup 7 is immobilizated in second ontology 5 and two ground strips 8 It is held in the upper and lower surface of second ontology 5, a shielding case 9 coats second ontology 5.

As shown in Figure 3 and Figure 4, second ontology 5 has one second base portion 51, and backward from second base portion 51 Extend to form a docking part 52, the rear end of the docking section 52 one butt cavity 521 of recessed formation forward, for a butt connector （It is not shown, similarly hereinafter）Grafting.The leading edge of the upper surface of second base portion 51 two recesses 511 of recessed formation backward.

As shown in Figures 4 to 6, the shield terminal 6 and the second end subgroup 7 are that metallic plate punching is formed, often There are one shield terminal 6 holding parts 61, the holding parts 61 to be immobilizated in second base portion 51；From the holding parts 61 The latch portion 62 extended rearwardly to form, the latch portion 62 extends to the docking section 52, and is revealed in the butt cavity 521 It is interior, so as to the tongue piece with the butt connector（It is not shown, similarly hereinafter）Mutually latch.Further, the first weld part 211 described in face The holding parts 61 of the shield terminal 6 extend to form a pin 63 forward, be revealed in second base portion 51.Each institute Stating ground strip 8 has a shrapnel 81, passes through the surface of the butt cavity 521 to enter the butt cavity 521, abuts described in succession Connect the shell of device（It is not shown, similarly hereinafter）, it is grounded.

As shown in Figure 4 and Figure 5, the second end subgroup 7 is respectively second ground terminal 71, one pieces the from left to right The two second signal terminal 72, one of inspection terminal 74, the two second source terminals 73 of power supply terminal 73, one and one second Ground terminal 71.Wherein, two second ground terminals 71 and two second source terminals 73 are symmetrical respectively sets It is placed in second ontology 5.One bridge part 712, connects two second ground terminals 71, and an interconnecting piece 732 connects described in two Power supply terminal makes two second ground terminals 71 form integral type knot by the bridge part 712 and the interconnecting piece 732 Structure and the two second source terminals 73 form integral structure.

As shown in Fig. 4, Fig. 8 and Fig. 9, the lateral bending of the interconnecting piece 732 extends to form one second tail portion 731 and is revealed in institute The second base portion 51 is stated, second tail portion 731 is in tabular and positioned at the lower section of first tail portion 231；Each described second There is signal terminal 72 one second welding foot 721 to be revealed in second base portion 51, and each second welding foot 721 is in flat Plate and the lower section for being located at first welding foot 221；Second ground connection of first weld part 211 described in face There is terminal 71 flat 1 second weld part 711 to be revealed in second base portion 51, and be located at first weld part 211 Between the pin 63, and three closely amplexiforms, further, the leading edge recessed formation backward of second weld part 711 The floor projection of one second notch 714, second notch 714 and first notch 201 is least partially overlapped, the pin 63 surface open is in first notch 201 and second notch 714.In this way, in the first end subgroup 2 and described During two-terminal group 7 is welded, when a solder C meltings, the solder C can be from described the first of first tail portion 231 Notch 201 flows to the surface of second tail portion 731；It is flowed to from corresponding first notch 201 of first welding foot 221 The surface of second welding foot 721；The table of the pin 63 is flowed to from first notch 201 and second notch 714 Face easily realizes that first power supply terminal 23 and the second source terminal 73 correspondence are welded and fixed with this, each described the One signal terminal 22 and the second signal terminal 72 correspondence are welded and fixed, first ground terminal 21, second ground connection Terminal 71 and the shield terminal 6 are welded and fixed, and then realize first connector 200 and second connector 300 Electrically conduct, eliminate the necessity of setting switching circuit board in the adapter 100, reduce the adapter 100 Number of parts is conducive to the miniaturization of the adapter 100, reduces the production cost of the adapter 100.In addition, described The one directly correspondence of terminal group 2 is fixedly welded on the second end subgroup 7, also shortens signal transmission path, is conducive to described in raising The quality of adapter 100.The present embodiment, the solder C used can be used in other embodiments for tin or tin alloy Any appropriate welding material, as long as 2 corresponding terminal of first end subgroup end corresponding with the second end subgroup 7 can be made Sub- firm welding is stablized, and is not limited herein.

As shown in Figure 5 and Figure 8, the bridge part 712 is located at the top of the second signal terminal 72, the interconnecting piece 732 are located at the underface of first welding foot, 221 and second welding foot 721, optimize the first end subgroup 2 and second end The space utilization rate of 7 welding region of subgroup.Further, two abutting parts 713 are extended rearwardly to form from the bridge part 712, often One abutting part 713 corresponds to and across a recess 511 abuts the shielding case 9, make second ground terminal 71 with 9 earth-continuity of the shielding case.In addition, the two second signal terminals 72 between two abutting parts 713, avoid it is described Abutting part 713 abuts second signal terminal 72 described in upper and lower resiliency deforming contact when the shielding case 9, prevents the second signal 72 short circuit of terminal.

As shown in Figure 3 and Figure 4, second ground terminal 71 and the second source terminal 73 are for tuning-fork type knot Structure, and the plate face of second ground terminal 71 is in be vertically arranged, it is recessed backward from the leading edge of each second ground terminal 71 If forming an opening 715, two internal faces up and down of the opening 715 protrude out to form a convex thorn 716 respectively, the two convex thorns 716 It abuts two surface up and down of the holding parts 61 of the shield terminal 6 respectively, realizes second ground terminal 71 and described 6 another grounding paths of shield terminal.Preferably, the inspection terminal 74 passes through a resistance D and second ground terminal 71 Second weld part 711 conducting, to achieve the purpose that reduce by 74 potential of inspection terminal, it is ensured that the inspection terminal 74 The stability of detection instruction function.

In conclusion adapter 100 of the present invention has following advantageous effect：

（1）First ground terminal 21, second ground terminal 71 and 6 three of the shield terminal are in direct contact, described The terminal of first connector 200 and second connector 300 directly electrically conducts, and makes the adapter 100 without setting PCBA board connects the terminal of the terminal and second connector 300 of first connector 200, reduces the adapter 100 number of parts is conducive to the miniaturization of the adapter 100, reduces the production cost of the adapter 100；In addition, institute The terminal for stating the first connector 200 is directly fixedly welded on the terminal of second connector 300, also shortens signal transmission road Diameter is conducive to improve the quality of the adapter 100.

（2）During the first end subgroup 2 and the second end subgroup 7 are welded, when a solder C meltings, institute The surface of second tail portion 731 can be flowed to from first notch 201 of first tail portion 231 by stating solder C；From described One welding foot, 221 corresponding first notch 201 flows to the surface of second welding foot 721；From first notch 201 The surface that the pin 63 is flowed to second notch 714 easily realizes first power supply terminal 23 and described with this Two power supply terminals 73 correspondence is welded and fixed, and each first signal terminal 22 and the second signal terminal 72 correspond to welding admittedly Fixed, first ground terminal 21, second ground terminal 71 and the shield terminal 6 are welded and fixed.

（3）The two second signal terminals 72 avoid the abutting part 713 from abutting between two abutting parts 713 Second signal terminal 72 described in resiliency deforming contact above and below when the shielding case 9, prevents the second signal terminal 72 short-circuit.

（4）The bridge part 712 is located at the top of the second signal terminal 72, and the interconnecting piece 732 is located at described the The underface of one welding foot 221 and the second welding foot 721 optimizes 7 welding region of the first end subgroup 2 and second end subgroup Space utilization rate.

The upper explanation that only the preferred embodiments of the invention is described in detail, non-therefore the limitation present invention the scope of the claims, institute Changed with all equivalence techniques with carried out by this creation specification and diagramatic content, is both contained in the scope of the claims of the present invention.

Claims

1. a kind of adapter, including one first connector and it connect positioned at first connector rear and with described first

One second connector that device is electrically connected, which is characterized in that including：

There is first connector the first noumenon, one first ground terminal to be immobilizated in the first noumenon；

Second connector has one second ontology, and one second ground terminal and a shield terminal are immobilizated in described second Body, first ground terminal, second ground terminal and the shield terminal three are in direct contact.

2. adapter as described in claim 1, it is characterised in that：There is first ground terminal one first weld part to appear In the first noumenon, there is second ground terminal one second weld part to be revealed in second ontology and the shielding There is terminal a pin to be revealed in second ontology, first weld part, second weld part and the pin three It is in tabular and is welded and fixed, and second welding position is between first weld part and the pin.

3. adapter as described in claim 1, it is characterised in that：First ground terminal has flat 1 first weldering Socket part is revealed in the first noumenon, the back edge of first weld part, one first notch of recessed formation forward, and described second There is ground terminal flat 1 second weld part to be revealed in second ontology, and the leading edge of second weld part is backward One second notch of recessed formation, first notch are located at the top of second notch and first notch and described second The floor projection of notch is least partially overlapped.

4. adapter as claimed in claim 3, it is characterised in that：There is the shield terminal a flat pin to be revealed in Second ontology, the pin is located at the lower section of second notch, and the surface open of the pin is lacked in described first Mouth and second notch.

5. adapter as claimed in claim 4, it is characterised in that：One solder is lacked by first notch and described second Mouth flows into the pin surface, and first weld part, second weld part and the pin is made securely to weld.

6. adapter as described in claim 1, it is characterised in that：First connector has at least one first power supply terminal At least one first signal terminal, second connector have an at least second source terminal and an at least second signal end Son, first power supply terminal is corresponding with the second source terminal to be welded and fixed, first signal terminal and described second Signal terminal correspondence is welded and fixed.

7. adapter as claimed in claim 6, it is characterised in that：Each first signal terminal has one first welding foot Extend the first noumenon, there is each second signal terminal one second leg to extend second ontology, each The first welding foot correspondence is welded in second welding foot, and the second source terminal is two and is symmetrical set In second ontology, the second signal terminal is between the two second source terminals, an interconnecting piece, described in connection two Second source terminal, the connecting portion is in the underface of first welding foot and second welding foot.

8. adapter as claimed in claim 7, it is characterised in that：There is first power supply terminal one first tail portion to be revealed in The first noumenon, the two second source terminals are tuning-fork type structure, and laterally bending extends to form one for the interconnecting piece Two tail portions, second tail portion are welded in first tail portion.

9. adapter as described in claim 1, it is characterised in that：Second ground terminal is tuning-fork type terminal structure and is It two and is symmetrical set in second ontology, a bridge part, two second ground terminals is connected, from the bridge part An at least abutting part is extended rearwardly to form, second ontology corresponds to the abutting part and forms an at least recess, a shielding case, set If second ontology, the abutting part passes through the recess to abut the shielding case.

10. adapter as described in claim 1, it is characterised in that：Second connector has an inspection terminal, described to detect It surveys terminal and second ground terminal is connected by a resistance.

11. adapter as described in claim 1, it is characterised in that：First connector meets the plug specification of USB2.0, Its on the first noumenon it is transversely arranged be one first power supply terminal, two the first signal terminals and one it is described first ground connection Terminal, second connector meet USB Type-C socket specifications, in it is transversely arranged on second ontology be described in one Second ground terminal, a second source terminal, two second signal terminals, an inspection terminal, a second source terminal, one described Two ground terminals.

12. a kind of adapter, including one first connector and one second connector with first connector electric connection, It is characterized in that, including：

There is second connector one second ontology, at least one second ground terminal and an at least shield terminal to be immobilizated in described Second ontology, second ground terminal electrically conduct with the shield terminal, and second ground terminal or the shielding Terminal is in direct contact with first ground terminal.

13. adapter as claimed in claim 12, it is characterised in that：Each terminal in first connector is in its tail end It is respectively formed one first notch, and each first notch corresponds to the top for each terminal being located in second connector.

14. adapter as claimed in claim 12, it is characterised in that：Second ground terminal and the shield terminal are Metal plate is stamped and formed out, and the plate face of second ground terminal is in be vertically arranged, the plate edge of the second ground terminal tail end Recessed to form an opening, the plate face of the shield terminal is clamped in the opening.

15. adapter as claimed in claim 14, it is characterised in that：Two internal faces up and down of the opening protrude out to be formed respectively One convex thorn, the two convex thorns abut two surface up and down of the shield terminal respectively.

16. adapter as claimed in claim 12, it is characterised in that：Second ground terminal be tuning-fork type terminal structure and It for two and is symmetrical set in second ontology, a bridge part, two second ground terminals is connected, from the bridge joint Portion extends rearwardly to form two abutting parts, and second ontology corresponds to two abutting parts and forms two recesses, a shielding case, set If second ontology, each abutting part is corresponded to abuts the shielding case, second connection across a recess Device includes two second signal terminals being disposed adjacent, and the two second signal terminals are between two abutting parts.

17. adapter as claimed in claim 12, it is characterised in that：It is in tuning fork structure that second connector, which further includes two, Two second source terminals, an inspection terminal between second ground terminal and a second source terminal, The inspection terminal connects second ground terminal by a resistance.

18. adapter as claimed in claim 12, it is characterised in that：First connector meets the plug rule of USB2.0 Lattice, in it is transversely arranged on the first noumenon be one first power supply terminal, two the first signal terminals and one described first Ground terminal, second connector meet USB Type-C socket specifications, in it is transversely arranged on second ontology be one Second ground terminal, a second source terminal, two second signal terminals, an inspection terminal, a second source terminal, an institute State the second ground terminal.