JP3119332B2 - Communication line connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication line connecting device used in a control system and the like, and more particularly to a structure in which a connecting operation of a coaxial cable can be easily performed even in a small space.

[0002]

2. Description of the Related Art In a control system for industrial control equipment, as disclosed in Japanese Utility Model Laid-Open Publication No. 2-16636 proposed by the present applicant, a connector unit for connecting an input / output communication cable is provided on a housing side. It is provided in. FIG. 4 is a configuration diagram of such a conventional connector unit.
Is a front view, and (B) is a BB cross-sectional view of the front view. In the figure, a printed circuit board 10 on which an input / output wiring pattern is formed is located in parallel with a front side bracket 12 via a spacer 11 made of a material such as bakelite. The back side bracket 13 is mounted on the back side of the printed circuit board 10 and is used for reinforcing the cable connector 30 with screws.

A fixing screw 20 fixes the front bracket 12 to a front panel 40 provided on the front surface of the housing, and is provided with a stopper 21 such as an E-ring. The fastening screw 23 fixes the printed circuit board 10 to the front side bracket 12. The mounting screw 24 is for the cable connector 3
0 is attached to the front bracket 12, and the front end reaches the rear bracket 13. The cable connector 30 is to which a communication cable using a coaxial cable is attached, and has a form called, for example, an N-type connector. The plate 31 is a flat plate forming a part of the cable connector 30, and is in contact with the front bracket 12, and has holes for mounting screws 24 at four corners. The internal connector 32 is mounted on the back side of the printed circuit board 10 and is used for signal line connection with a unit housed inside the housing.

[0004]

However, there are many fixing screws 20, two fastening screws 23, eight mounting screws 24, and the number of screws is large. There is a problem that the manufacturing cost increases. Further, in the conventional connector unit in which the cable connector 30 is attached to the front panel surface 40 in a protruding state, a gap corresponding to the bending radius of the communication cable is secured around the unit housing when connecting the communication cable. In some cases, the communication cable cannot be connected because the substantial space required to bend the communication cable is insufficient. Then, it is necessary to secure a sufficient communication cable connection space around the unit housing again, and when the unit housing is accommodated in a larger housing, the mounting position is changed and the unit housing is changed. When the body is installed in the instrumentation room, it is necessary to perform instrumentation work again, and there has been a problem that the connection work of the communication coaxial cable becomes complicated. The present invention has solved the above-mentioned problems,
An object of the present invention is to provide a communication line connection device that can reliably perform a connection operation of a communication coaxial cable even when the number of parts is small and a space around a unit housing is small.

[0005]

According to the present invention, there is provided a connector unit in which a cable connector to which a coaxial cable is attached is fixed on one surface and an internal connector is fixed on the other surface. 35 and an upper cover 5 covering the internal connector side of the connector unit.
0 and a lower cover 60, and an upper case 70 and a lower case 80 that cover the cable connector side of the connector unit and are locked by the upper cover and the lower cover.

A front surface of the upper case and the lower case facing the cable connector is mounted on the front panel 40, and a distance d between the front panel and the cable connector is such that the coaxial cable is connected to the cable connector. I Ri said cable in locked is it in
And a length that absorbs an increase in bending stress generated in the connector for a cable .

[0007]

When the coaxial cable is connected to the cable connector, the bending force increases at the end due to the effect of the fixation. Therefore, when the coaxial cable is bent and mounted on the front panel, if the distance caused by the increase in the bending force is absorbed by the distance d between the front panel and the cable connector, the coaxial cable viewed from the front panel is removed. The bending radius is a small value which is not affected by the connection with the cable connector, and the work of attaching the coaxial cable is facilitated. Here, the distance d between the front panel and the cable connector is ensured by the connector unit, the upper and lower covers, and the upper and lower cases.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG.
FIG. 2 is a structural view of an assembled state showing one embodiment of the present invention, FIG. 2 is a structural view after assembling, (A) is a plan view with a part cut away, (B) is a front view, (C) is a rear view, and (D) is a side view. FIG. 3 is a configuration diagram of the connector unit 35.
(A) is a front view, (B) is a plan sectional view, and (C) is a side view. 4, the connector unit 35 is smaller than that of FIG. 4, and the bracket 14 has an area required for mounting two cable connectors 30. It is attached to the printed circuit board 10 by leg portions 15 formed by bending. The internal connector 32 is mounted on the printed circuit board 10 on the side opposite to the cable connector 30.

The upper cover 50 and the lower cover 60 cover the internal connector 32 of the connector unit 35. In the upper cover 50, a guide groove 51 for engaging with the end of the printed circuit board 10 is provided on the inner side surface of the upper cover 50, and a rectangular locking hole 52 used for locking with the lower cover 60 is formed on the upper side surface. Two are provided. The connector cover 53 is located on the rear side of the upper cover 50 and covers the rear surface of the connector unit 35 together with the rear surface of the lower cover 60 with the pin holes of the internal connector 32 exposed.
The case mounting groove 54 is provided at the front end of the upper cover 50 and engages with the upper case 70. The guide pin 55 is a convex portion provided on the back surface of the upper cover 50 and functions to position the unit with respect to a unit (not shown) integrated with the front panel 40.
And the unit-side connector can be easily connected.

The lower cover 60 is provided with a guide groove 61 for engaging with the end of the printed circuit board 10 on the inside of the side surface of the lower cover 60, and a locking claw 53 for engaging with the locking hole 52 on the upper side. Are provided. The housing guide projection 63 is provided on the side surface of the lower cover 60, and is provided on the front panel 40.
When it is mounted on a unit (not shown) integral with the unit, it engages with the rail on the unit side to guide in the insertion direction. The case mounting groove 64 is provided at the front end of the lower cover 60 and engages with the lower case 80.

The upper case 70 and the lower case 80 cover the cable connector 30 side of the connector unit 35, and surround the entire connector unit 35 in cooperation with the upper cover 50 and the lower cover 60. The opening is secured as a cable insertion hole 76.
The upper case 70 is provided with a guide projection 71 at the lower end of the side surface, and is responsible for positioning with the lower case 80.
The holding groove 72 is provided at the front end of the side surface of the upper case 70, and engages with the holding projection 82 to engage the upper case 70.
And the lower case 80 are engaged. The front surface 73 is located in front of the upper case 70 and has a recess for a cable insertion hole 76 formed therein. The cover mounting projection 74 engages with the case mounting groove 54 and positions the upper case 70 with respect to the upper cover 50. Screws 75 fix upper case 70 to lower case 80.

The lower case 80 is provided with a guide projection 81 at the upper end of the side surface, and is responsible for positioning with the upper case 70. The holding projection 82 is provided near the side surface on the front rear side of the lower case 80 and engages with the holding groove 72. The front surface 83 is located at the front of the lower case 80, has a concave portion for the cable insertion hole 76, and is shaped to wrap both sides of the front surface 73. The housing fixing portion 84 is provided at the upper end and the lower end of the front surface 83, and has a screw 87 for screwing to the front panel 40. The cover mounting projection 85 engages with the case mounting groove 64, and positions the lower case 80 with respect to the lower cover 60. Housing guide projection 8
Numeral 6 is provided on the side surface of the lower case 80, and engages with a rail on the unit side to guide in the insertion direction when mounted on a unit (not shown) integrated with the front panel 40. In the assembled state, the housing guide projections 63, 86
Is linear.

In the device configured as described above, the distance d between the cable connector 30 and the front panel 40 substantially coincides with the distance d between the cable connector 30 and the rear surface of the cable insertion hole 76. The coaxial cable 90 has a bending radius R at a portion not affected by the connector for engagement with the cable connector 30. Therefore, this interval d
Is longer than the engaging connector of the coaxial cable 90, and the bending force of the coaxial cable 90 when the coaxial cable 90 is bent from the cable insertion hole 76 is reduced to a value at which the cable connector 30 is not affected. I have. This facilitates processing of the communication coaxial cable 90 on the front panel 40.

Incidentally, the coating material of the communication coaxial cable 90 is
If vinyl chloride is used, use a plasticizer
Upper case 70 and lower case 80
It is good to use nylon. Also, tin the bracket 14
If plated steel is used, the wheel may
A phenomenon called ska occurs. Therefore, the upper cover 5
When the bracket 14 and the printed board 10 are separated from each other by the 0 and the lower cover 60, the whisker phenomenon is prevented. When the cable unit 35 is used for a different type of bus, it may be desired that the cable unit 35 be incompatible. Therefore, in order to eliminate compatibility and prevent erroneous mounting, the position of the guide pin 55 may be changed according to the unit to be mounted.

[0015]

As described above, according to the present invention, since the connector unit is covered by the upper and lower covers and the upper and lower cases, the assembling work is smooth, and the cable connector is deeper than the front panel 40. , The coaxial cable 90 is connected to the front panel, for example.
Coaxial cable 90 when pulled out parallel to the surface of
Bending force exerted on the cable connector
And so no, there is an effect that it becomes easy to secure the bending radius of the coaxial cable 90.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an assembled state showing one embodiment of the present invention.

FIG. 2 is a configuration diagram after assembly.

FIG. 3 is a configuration diagram of a connector unit 35.

FIG. 4 is a configuration diagram of a conventional connector unit.

[Explanation of symbols]

 30 Cable Connector 32 Internal Connector 35 Connector Unit 40 Front Panel 50 Upper Cover 60 Lower Cover 70 Upper Case 80 Lower Case 90 Coaxial Cable

Continuation of the front page (56) References JP-A-1-276575 (JP, A) JP-A-61-153009 (JP, U) JP-A-6-30203 (JP, U) JP-A-61-133825 (JP) , U) Japanese Utility Model 3-101873 (JP, U) Japanese Utility Model 1-177709 (JP, U) Japanese Utility Model 61-48590 (JP, U) Japanese Utility Model 2-52284 (JP, U)

Claims (1)

(57) [Claims] A connector unit (3) in which a cable connector (30) to which a coaxial cable is attached is fixed on one surface and an internal connector (32) is fixed on the other surface.
5), an upper cover (50) and a lower cover (60) that cover the internal connector side of the connector unit, and an upper portion that covers the cable connector side of the connector unit and is locked by the upper cover and the lower cover. A case (70) and a lower case (80) are provided. A front surface of the upper case and the lower case, which faces the cable connector, is mounted on the front panel (40). gap (d) are due Ri connector the cable to the coaxial cable is locked into connector the cable
A communication line connecting device having a length that absorbs an increase in bending stress generated in the communication line.