CN102447179A

CN102447179A - Plug and communication interface with same

Info

Publication number: CN102447179A
Application number: CN2010105064196A
Authority: CN
Inventors: 席强; 高俊
Original assignee: Siemens AG
Current assignee: Siemens Numerical Control Ltd
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2012-05-09
Anticipated expiration: 2030-09-30
Also published as: CN102447179B

Abstract

The invention provides a plug which comprises a shell, an earth terminal, a first elastic sheet, a sheet metal and a support element; the earth terminal is accommodated in the shell; the first elastic sheet is provided with a first terminal and a first free end; one end of the sheet metal is provided with the earth terminal, and the other end of the sheet metal is provided with a contact plate arranged opposite to the first free end; the first elastic sheet is arranged between the support element and the sheet metal in an electric insulation way; and when a cable is plugged into the plug, the cable is supported on the support element and pushes the first free end to be in contact with the contact plate. The plug and the communication interface provided by the invention have the advantages that the plug can be conveniently matched with a communication device for use, so that the connection state of the cable can be automatically identified according to the plug-in situation of the cable.

Description

A kind of plug and communication interface with this plug

Technical field

The present invention relates to a kind of plug, particularly relate to a kind of plug that is used for communication interface.In addition, the invention still further relates to a kind of communication interface with this plug.

Background technology

In communication network, connect communicator through different communication interfaces, for example RS232, RS422, RS485 etc. as node.At the end node place, terminal resistance must be set absorb the signal reflex that does not match and produce because of impedance, otherwise will cause distorted signals and cause error of transmission, particularly all the more so under long distance, high-frequency situation.Usually, user's fibrous root comes configurating terminal resistance manually according to the topological diagram of communication network.

A kind of existing execution mode is to come manually to be connected communicator with the connecting line that comprises DIP toggle switch and terminal resistance, and connects a connecting line extraly at the end node place, through terminal resistance incoming end node is stoped signal reflex.The shortcoming of this execution mode is that manual connection brings inconvenience to the user, and is particularly all the more so for the more communication network of node, also possibly forget the resistance that accesses terminal because of careless omission simultaneously.

Summary of the invention

The objective of the invention is to, a kind of new type of plug that can be used easily with communicator is provided and has the communication interface of this plug.

Said purpose realizes through a kind of plug.Said plug comprises: the earth terminal that housing is interior with being located in said housing; One first shell fragment has a first terminal and one first free end; A sheet metal, an end are said earth terminal, and the other end is the contact plate of placing relatively with said first free end; And supporting member.Be arranged between said supporting member and the said sheet metal the said first shell fragment electric insulation.When a cable inserted in the said plug, said cable was bearing on the said supporting member, and promoted said first free end and contact with said contact plate.

According to one aspect of the present invention, said plug also comprises one second shell fragment.Said second shell fragment has one second terminal and one second free end, is arranged between said supporting member and the said sheet metal the wherein said second shell fragment electric insulation.When a cable inserted in the said plug, said cable was bearing on the said supporting member, and promoted said second free end and contact with said contact plate.

According to another aspect of the present invention, said first free end and said second free end all have a bending.

According to one side more of the present invention, said supporting member has first bearing-surface and second bearing-surface, and said bending is given prominence on said first bearing-surface and said second bearing-surface.

According to another aspect of the present invention, said housing comprises a holder, and said holder has terminal hole, and said earth terminal, said the first terminal and said second terminal are fixed in the said terminal hole.

Said purpose also realizes through a kind of communication interface.Said communication interface comprises a plug and a socket.Said plug is above-mentioned plug, and said socket is used to connect a communicator, and cooperates with said plug.

The invention has the advantages that: said plug can be used with communicator easily, thereby whether inserts the connection status of judging cable automatically according to cable.

Description of drawings

In conjunction with following accompanying drawing, it is clearer that feature and advantage of the present invention will become.Wherein:

Fig. 1 has shown the stereogram that plug 1 of the present invention decomposes;

Fig. 2 has shown the sketch map when plug 1 of the present invention is used for communicator 2;

Fig. 3 has shown the stereogram that is used for cable 17 of the present invention and cable 18;

Fig. 4 has shown the stereogram of holder 12 of the present invention;

Fig. 5 has shown the stereogram of supporting member 13 of the present invention;

Fig. 6 has shown the stereogram of first shell fragment 14 of the present invention;

Fig. 7 has shown the stereogram of sheet metal 16 of the present invention.

Embodiment

Fig. 1 has schematically shown the plug of the present invention 1 that decomposes, and wherein plug 1 comprises a housing.One supporting member 13, one first shell fragment 14, one second shell fragment 15 and a sheet metal 16 are located in the said housing.Housing comprises first's housing 111, holder 12 and second portion housing 112, and wherein first's housing 111, holder 12 and second portion housing 112 can be fixing through two screws 114, and can hide screw 114 through cover plate 113.Holder 12 is as shown in Figure 4 to have plug hole 121, plug hole 122, plug hole 123, plug hole 124, plug hole 125, plug hole 126, plug hole 127 and plug hole 128 from right to left successively.These plug holes are used for removably fixing corresponding terminal.Supporting member 13 is as shown in Figure 5 to comprise dead end 131, and first bearing-surface 132 and second bearing-surface 133 that is used to support cable 18 that can be used for supporting cable 17, and its hollow end 131 inserts in plug holes 123 with fixed support 13.First shell fragment, 14 the first terminal 141 and one first free ends 142 of comprising as shown in Figure 6, wherein the first terminal 141 inserts plug holes 125 and said first free end 142 can move freely.Second shell fragment 15 and first shell fragment 14 are identical, and one second terminal 151 and one second free end 152 of comprising as shown in Figure 1, and wherein second terminal 151 inserts plug holes 124 and said second free end 142 can move freely.Sheet metal 16 one of which ends as shown in Figure 7 are earth terminal 161, and its other end is a contact plate 162, and wherein earth terminal 161 inserts in the plug hole 126.

Each parts of plug 1 are installed according to the relative tertiary location among Fig. 1.After being in place, supporting member 13, first shell fragment 14, second shell fragment 15 and sheet metal 16 all are located in the housing of being made up of first's housing 111, holder 12 and second portion housing 112.First shell fragment 14 and second shell fragment 15 are between supporting member 13 and sheet metal 16, and wherein first free end 142 and second free end 152 are placed with respect to contact plate 162.First shell fragment 14, second shell fragment 15, supporting member 13 and sheet metal 16 are arranged through the for example inboard boss of said housing each other with being electrically insulated from each other.First free end 142 and second free end 152 all have a bending, and said bending is respectively near the edge of first bearing-surface 132 and second bearing-surface 133 and give prominence on first bearing-surface 132 and second bearing-surface 133.In a side relative with holder 12, said housing has first opening 115 and second opening 116, and wherein cable 17 can insert first opening 115, and cable 18 can insert second opening 116.Fig. 3 has shown and has been used for cable of the present invention 17 and cable 18.When cable 17 inserts in the plug 1 through first opening 115; The supporting neck 173 of cable 17 is bearing on first bearing-surface 132 of supporting member 13; And promote first free end, 142 contact metal films 16 of first shell fragment 14 downwards, thereby with the first terminal 141 and earth terminal 161 short circuits.At this moment, the binding post 171 and the binding post 172 of cable 17 is separately fixed in the plug hole 128 and plug hole 127 of holder 12, is connected thereby after inserting socket 21, set up signal with the socket aperture 218 of socket 21 with the conductor in the socket aperture 217.When cable 18 inserts in the plug 1 through second opening 116; The supporting neck 183 of cable 18 is bearing on second bearing-surface 133 of supporting member 13; And promote second free end, 152 contact metal films 16 of second shell fragment 15 downwards, thereby with second terminal 151 and earth terminal 161 short circuits.At this moment, the binding post 181 and the binding post 182 of cable 18 is separately fixed in the plug hole 122 and plug hole 121 of holder 12, is connected thereby after inserting socket 21, set up signal with socket aperture 212 with the conductor of socket aperture 211.The outside of cable 17 and cable 18 is enclosed with the protective layer of insulating material.It will be understood by those skilled in the art that plug 1 also can only have in first shell fragment 14 and second shell fragment 15.

Fig. 2 has shown the sketch map when plug 1 of the present invention is used for communicator 2.Communicator 2 can be the part of main website and/or slave station, and is regarded as the node in the communication network.Communicator 2 comprises socket 21, monitoring unit 26, transceiver 25, switch 22, switch 23 and terminal resistance 24 (only one in four terminal resistances being marked); Wherein monitoring unit 26 can be a corresponding functional modules with transceiver 25, and these functional modules can be realized by one or a plurality of electronic installation.Monitoring unit 26 for example is microcontroller or logical circuit etc., and switch 22 for example is mos field effect transistor (MOSFET), relay and analog switch etc. with switch 23.Socket 21 (the last figure of the digitized representation socket aperture label among Fig. 2 on the socket 21; The label front two is 21) on socket aperture 216 ground connection; Socket aperture 214 is connected to high potential with socket aperture 215; Wherein socket aperture 216, socket aperture 215 and socket aperture 214 respectively with plug 1 (last figure of the digitized representation plug hole label among Fig. 2 on the plug 1, the label front two is 12) on earth terminal 161, the first terminal 141 corresponding with second terminal 151.Plug 1 cooperates formation one communication interface with socket 21.After plug 1 inserted in the socket 21, the first terminal 141 and second terminal 151 were connected to electronegative potential through being connected with conductor in the socket aperture 214 with socket aperture 215 respectively.The signal that transceiver 25 receives from socket 1, and can handle said signal, and can send signal to socket 1.Transceiver 25 can pass through earth terminal 161, the first terminal 141 and two binding posts beyond second terminal 151 (binding

post

181 and 182 for example; Or binding post 171 and 172) receives and send high potential signal TH and low-potential signal TL, thereby in network, realize efficient communication.It will be understood by those skilled in the art that plug hole and the quantity of the socket aperture on the socket 21 on the plug that the binding post on the plug 1 is mated can correspondingly change according to actual needs.When terminal resistance 24 places in circuit, terminal resistance 24 is parallelly connected with socket 21.Switch 22 and switch 23 are set respectively at the two ends of terminal resistance 24, and wherein switch 22 and switch 23 leave from circuit interruption with terminal resistance 24 places in circuit or with terminal resistance 24 according to the judgement of 25 pairs of node character of monitoring unit.Be connected with the electric capacity that is used to lotus root between the terminal resistance 24 of per two series connection among Fig. 2, and the resistance value of per two pairs of series connection is different.The storage device of monitoring unit 26 can be stored the data relevant with each terminal resistance 24, and monitoring unit 26 can be selected wherein a pair of terminal resistance 24 places in circuit with switch 23 according to the needs control switch 22 of coupling.Although communicator shown in Figure 2 only has two pairs of terminal resistances 24, it will be understood by those skilled in the art that the present invention can have a pair of terminal resistance or have the terminal resistance more than two pairs.

Monitoring unit 26 is judged the connection status of node character and interface according to the listed relation of following table according to the input signal II1 and the input signal II2 of reflection socket aperture 214 and socket aperture 215 current potentials height:

II1	II2	The connection status of interface	Node character	Action
					Low	Low	All-pass	Intermediate node	Disconnected end resistance
Low	High	One logical one is disconnected	End node	Resistance accesses terminal
					High	Low	One logical one is disconnected	End node	Resistance accesses terminal
High	High	Complete disconnected	Empty node	Disconnected end resistance

Promptly when the current potential of the input signal II1 of monitoring unit 26 and input signal II2 is identical, monitoring unit 26 master cocks 22 and switch 23 are opened terminal resistance 24 from circuit interruption; When the current potential of the input signal II1 of monitoring unit 26 and input signal II2 not simultaneously, monitoring unit 26 master cocks 22 and switch 23 are with terminal resistance 14 places in circuit.According to unshowned second kind of execution mode of the present invention, when the current potential of input signal II1 and input signal II2 was high potential, monitoring unit 26 did not carry out any action.

Although more than showed execution mode of the present invention, said execution mode is not intended to show all possible form of the present invention.In addition, the content in this specification is descriptive, and nonrestrictive.Those skilled in the art can make variations and modifications to the content of this specification, and do not depart from the scope of purport of the present invention and claim.

Claims

1. a plug comprises a housing and an earth terminal (161) that is located in the said housing, it is characterized in that said plug (1) also comprises:

One first shell fragment (14) has a first terminal (141) and one first free end (142);

A sheet metal (16), an end are said earth terminal (161), and the other end is the contact plate of placing relatively with said first free end (142) (162); And

A supporting member (13);

Be arranged between said supporting member (13) and the said sheet metal (16) wherein said first shell fragment (14) electric insulation; When a cable (17,18) inserted in the said plug (1), said cable (17,18) was bearing on the said supporting member (13), and promoted said first free end (142) and contact with said contact plate (162).

2. plug as claimed in claim 1 is characterized in that, said plug (1) also comprises:

One second shell fragment (15) has one second terminal (151) and one second free end (152);

Be arranged between said supporting member (13) and the said sheet metal (16) wherein said second shell fragment (15) electric insulation; When a cable (17,18) inserted in the said plug (1), said cable (17,18) was bearing on the said supporting member (13), and promoted said second free end (152) and contact with said contact plate (162).

3. plug as claimed in claim 2 is characterized in that, said first free end (142) and said second free end (152) all have a bending.

4. plug as claimed in claim 3 is characterized in that, said supporting member (13) has first bearing-surface (132) and second bearing-surface (133), and said bending is given prominence on said first bearing-surface (132) and said second bearing-surface (133).

5. plug as claimed in claim 2; It is characterized in that; Said housing comprises a holder (12); Said holder (12) has a plurality of terminal holes (121 ... 128), said earth terminal (161), said the first terminal (141) and said second terminal (151) are fixed on said terminal hole (121 ... 128) in.

6. communication interface, said communication interface comprises a plug (1) and a socket (21), it is characterized in that, said plug (1) is the described plug of each claim in the claim 1 to 5; Said socket (21) is used to connect a communicator (2), and cooperates with said plug (1).