JPH0346470Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a first serial interface for transferring data including digital binary serial data, control signals, and timing signals during data transmission; The present invention relates to a line converter that mutually converts data formats between an Ace and a second serial interface with different specifications. More specifically, it relates to a cable connection structure for interconnecting line converters. Here, "specifications" refer to electrical, physical, and logical specifications.

[Prior Art] The present applicant has proposed a line converter of this type that has the same terminal arrangement as the first connector attached to the interface board of the first serial interface and is directly inserted into the first connector. a plurality of third connectors each having a terminal arrangement adapted to the connector of the second serial interface; and a first connector of the first serial interface connected to the second connector. a receiving circuit; and a first transmitting circuit of a second serial interface that is controlled by a control line from the second connector via the first receiving circuit and connects the first receiving circuit and the third connector. , a second receiving circuit of the second serial interface connected to the third connector, and a second transmitting circuit of the first serial interface connecting the second receiving circuit and the second connector. filed a patent application for a line converter equipped with a first receiving circuit, a first transmitting circuit, a second receiving circuit, and a power supply circuit that supplies power to the second transmitting circuit (Japanese Patent Laid-Open No. 155645/1983). .

This line converter is connected to a plurality of electronic devices connected in a multi-drop manner, and the third connectors of adjacent line converters are connected to each other by a cable.

[Problems to be solved by the invention] Since the number of line converters used varies depending on the number of electronic devices, cables are connected and disconnected frequently. For this reason, if a standardized connector for conventional interfaces is used as the third connector of this line converter, operations such as screw tightening are required when connecting and disconnecting cables, making it difficult to perform operations easily. ,
In addition, the connectors and cable plugs become larger, ultimately making it impossible to make the line converter more compact.

The purpose of this invention is to provide a cable connection structure for a line converter that allows cables to be easily attached and detached, miniaturizes connectors and cable plugs, and ultimately makes the line converter more compact. .

[Means for Solving the Problems] The present inventor focused on the fact that the number of transmission signal lines connected between these line converters was small, and used a known modular plug and its jack ( For example, we discovered that the above object can be achieved by using U.S. Patent No. 3,680,316),
The present invention was completed.

The cable connection structure of the line converter of the present invention has a third connector 17,
Attach the modular plugs 17a, 18a to the ends of the cables 17b, 18b connected to the third connectors 17, 18,
8a is constituted by a detachable jack.

These modular plugs 17a, 18a are made of a synthetic resin housing 170 in which a small cavity 173 is formed, and are inserted in parallel to each other inside the housing 170, and electrically connected to the wiring of the cables 17b, 18b inserted into the small cavity 173. A plurality of blade-shaped terminals 171 connected to each other and a housing 17
The housing 1 is elastically deformably protruded from the end of the housing 1.
70 and a holding clip 172 formed integrally with the holding clip 172.

The jack is made of a synthetic resin box 1 in which a large cavity 174 into which a housing 170 can be inserted is formed.
75 and the terminals of the third connectors 17 and 18, and are disposed facing the large cavity 174 through the inside of the box body 175, and when the housing 170 is inserted into the large cavity 174, the blade-shaped terminal 171 is electrically connected. and a locking groove 20 that is formed in the large cavity 174 and in which the holding clip 172 is elastically deformed and locked when the housing 170 is inserted into the large cavity 174.

[Function] When the modular plugs 17a, 18a are inserted into the third connectors 17, 18 constituted by jacks, the housing 170 is inserted into the large cavity 17 of the box body 175.
4, the blade-shaped terminal 171 is electrically connected to the contact element 19, which is the terminal of the connectors 17 and 18, and the holding clip 172 is elastically deformed and locked in the locking groove 20. When the clip 172 is elastically deformed toward the housing 170, the clip 172 comes off from the locking groove 20, and the housing 170 comes off from the box body 175.

[Example] Next, an example of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, the line converter 10 of this embodiment is the first interface.
This is a line converter that mutually converts data formats between RS-232-CI/F11 and RS-422-AI/F12, which is the second interface.
The transducer 10 comprises a second connector 16 on one side and two sets of third connectors 17 and 18 on the opposite side.

The second connector 16 is an RS-232-
It has the same terminal arrangement as the first connector 15 attached to the CI/F interface board 14,
It is designed so that it can be directly inserted into this connector 15. Third connectors 17 and 18 are RS-422-
Consists of a terminal arrangement compatible with the AI/F12 connector.

The second connector 16 has RS-232-CI/F11
A first receiving circuit 22 is connected, and this receiving circuit 22 includes light emitting elements 41, 42 and light receiving elements 43, 44.
and RS-422-AI/F12 first transmitting circuit 31
It is connected to third connectors 17 and 18 via. This transmitting circuit 31 is controlled by a control line from the connector 16 via the receiving circuit 22.

Also, the third connectors 17 and 18 have RS-422-
A second receiving circuit 32 of the AI/F 12 is connected.
This receiving circuit 32 includes a light emitting element 46 and a light receiving element 47.
and is connected to the connector 16 via the second transmission circuit 21 of the RS-232-CI/F 11.

The receiving circuit 22, the transmitting circuit 21, and the light emitting element 41,
42 and the light receiving element 47 are each supplied with power from the power supply circuit 23, and the transmitting circuit 31 and the receiving circuit 32 are supplied with power from the power supply circuit 23.
Power is supplied from the power supply circuit 33 to the light emitting element 46 and the light receiving elements 43 and 44, respectively.

Modular plugs 17a, 17c, 18a, 18c are attached to both ends of cables 17b, 18b connected to third connectors 17, 18, respectively. The third connectors 17 and 18 are constituted by synthetic resin jacks into which modular plugs 17a and 18a can be connected and detached, respectively. third connector 1
The contact elements 19 built into the connectors 7 and 18 are provided so as to correspond to the signal terminals including the transmission/reception data terminal and the control terminal of the second connector 16, respectively. The modular plugs 17c, 18c connected to the other ends of the cables 17b, 18b are inserted into another line converter (not shown) having the same configuration.

FIG. 3 is an enlarged sectional view of the connector 17 consisting of a jack and the modular plug 17a inserted into the connector. Although not shown, the other third connector 18, which is a jack, and the modular plugs 17c, 18
The internal structures of a and 18c are similarly configured. Therefore, the connector 17 and the modular plug 17a will be explained as representatives.

The modular plug 17a includes a synthetic resin housing 170 in which a small cavity 173 is formed. A plurality of blade-shaped terminals 171 are inserted in parallel to each other inside this housing 170, and thereby the blade-shaped terminals 171 are electrically connected to the wiring of the cable 17b inserted into the small cavity 173.
The housing 17 is located at the lower front end of the housing 170.
A holding clip 172 integrally formed with the holding clip 172 is provided in a protruding manner so as to be elastically deformable.

The connector 17, which is a jack, is connected to the housing 17.
A box body 175 made of synthetic resin is provided in which a large cavity 174 into which a 0 can be inserted is formed. A plurality of contact elements 19 are disposed passing through the inside of this box 175 and facing the large cavity 174. These contact elements 1
A blade-shaped terminal 171 is electrically connected to 9 with the housing 170 inserted into the large cavity 174. In addition, a holding clip 1 is inserted into the large cavity 174 with the housing 170 inserted into the large cavity 174.
A locking groove 20 is formed in which the locking groove 72 is elastically deformed and locked.

When the modular plug 17a having such a configuration is pushed into the third connector 17, which is the jack of the interface converter 10, the housing 170 enters the large cavity 174 of the box body 175, and the connector 1
A blade-shaped terminal 171 is electrically connected to the contact element 19 which is the terminal of 7. On the other hand, as the retaining clip 172 is inserted into the large cavity 174, it is elastically deformed and cammed upward to be locked in the locking groove 20 within the large cavity. This allows cable 17
b can be electrically and mechanically reliably connected to the line converter 10.

When removing the connected cable 17b from the converter 10, remove the housing 170 while elastically deforming the clip 172 toward the housing 170 with your fingers.
When pulled, the clip 172 comes off from the locking groove 20 and the housing 170 comes off from the box body 175. Thereby, the modular plug 17a can be easily taken out from the third connector 17.

[Effects of the invention] As described above, according to the invention, the modular plug is connected to the end of the cable, and this plug is configured to be removably connected to the third connector consisting of a jack, making it easy to connect and disconnect the cable. This can be done easily, and the connectors and cable plugs can be made smaller and lighter, ultimately making the line converter more compact.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a cable connection state of a line converter according to an embodiment of the present invention. Figure 2 is a diagram of its circuit configuration.
FIG. 3 is an enlarged cross-sectional view of the main part showing the state before connection of the cable. 10...Line converter, 11...RS-232-CI/
F (first serial interface), 12...
RS-422-AI/F (second serial interface), 14...Interface board, 15
...first connector, 16...second connector,
17, 18...Third connector (jack), 1
7a, 17c, 18a, 18c... modular plug, 17b, 18b... cable, 19... contact element, 20... locking groove, 21... second transmitting circuit, 22... first receiving circuit, 23 ,33...
...power supply circuit, 31...first transmission circuit, 32...
Second receiving circuit, 170...Housing, 171
...Blade-shaped terminal, 172...Retaining clip, 173...Small cavity, 174...Large cavity, 17
5...Box body.

Claims (1)

[Claims for Utility Model Registration] A first serial interface 11 for transferring data including digital binary serial data, control signals and timing signals during data transmission, and a second serial interface 11 with different specifications from this serial interface 11. This first connector mutually converts data formats with the serial interface 12 and has the same terminal arrangement as the first connector 15 attached to the interface board 14 of the first serial interface 11. A second connector 16 that can be directly inserted into 15
a plurality of third connectors 17 and 18 having a terminal arrangement compatible with the connector of the second serial interface 12; and a third connector of the first serial interface 11 connected to the second connector 16. The first receiving circuit 22 and the third connector 17, 1 are controlled by a control line from the second connector 16 via the first receiving circuit 22.
8, and a second receiving circuit 32 of the second serial interface 12 connected to the third connectors 17 and 18. , a second transmitting circuit 21 of the first serial interface 11 connecting the second receiving circuit 32 and the second connector 16; and the first receiving circuit 22 and the first transmitting circuit. 31, the second receiving circuit 32, and the power circuits 23, 33 that supply power to the second transmitting circuit 21, the cable 17b connects to the third connectors 17, 18. , 18b at the end of the modular plug 17.
a, 18a are attached, and the third connectors 17, 18 are constituted by jacks to which the modular plugs 17a, 18a can be attached and detached, and the modular plugs 17a, 18a are made of a synthetic resin housing 17 in which a small cavity 173 is formed.
0, a plurality of blade-shaped terminals 171 inserted in parallel to each other inside the housing 170 and electrically connected to the wiring of the cables 17b and 18b inserted into the small cavity 173, and an end of the housing 170. A retaining clip 172 is formed integrally with the housing 170 and protrudes elastically from the housing 170, and the jack is a synthetic resin box with a large cavity 174 into which the housing 170 can be inserted. 175 constitutes the terminals of the third connectors 17 and 18, and is disposed facing the large cavity 174 through the inside of the box body 175, and is connected to the housing 17.
0 inserted into the large cavity 174 and the contact element 19 electrically connected to the blade-shaped terminal 171; A cable connection structure for a line converter, characterized in that a locking groove 20 is provided in which a clip 172 is elastically deformed and locked.