JPH0719191Y2 - Structure of cable introduction duct - Google Patents

Description

[Detailed Description of the Invention] [Overview] Regarding the structure of the cable introduction duct attached to the shelf in which the circuit boards are inserted and arranged, the structure of the cable introduction duct in the shelf is simplified, and the insertion and removal of the circuit board and the introduction and connection of the external cable are performed. For the purpose of improving the workability of the cable, a cable introduction duct consisting of a cable receiver for introducing and holding an external cable and a lid having a cable lead-out groove which is rotated and opened and closed so as to cover the opening of the cable receiver is provided. The side edge of the closed lid is arranged on one side frame of the opening of the shelf to be inserted and arranged so as to prevent the circuit board from coming off.

[Industrial application field]

The present invention relates to a structure of a cable introduction duct arranged on a shelf in which circuit boards are inserted and arranged.

In an electronic / communication device or the like, a shelf has a plurality of circuit boards inserted and connected to connectors arranged in a row in the back, and is locked by a stopper so as not to come out of the shelf due to an earthquake or vibration during transportation. Further, a cable introduction duct for introducing and holding these external cables is provided on the front surface of the shelf, and some circuit boards have external cables connected to the front surface by connectors. Nowadays, it is desired to simplify their configurations and improve workability such as insertion / removal of circuit boards and introduction / connection of external cables.

[Conventional technology]

As shown in the perspective view of the main part of FIG. 4 and the enlarged perspective view of B part and the side view of FIGS. 5 (a) and 5 (b), the cable introduction duct 11 has a grooved sheet metal structure. A trough-shaped cable receiver 11a bent in a (U-shaped) cross section, and a sheet metal bent in an L-shaped cross section so as to cover the longitudinal opening of the trough, and cable lead-out grooves 11 at a pitch equal to the arrangement interval of the circuit boards 13.
It is composed of a lid 11b having a notch b-1 in a comb shape.

The cable receiver 11a is fixed by welding (or screwing) to one side frame 12a-1 along the arrangement direction of the openings 12a of the shelf 12, that is, the lower frame, and the lid 11b has its L-shaped bent portion 11b-. 2 is overlaid on the front side wall 11a-1 of the cable receiver 11a and is fixed by a mounting screw 11c.

On the other hand, the stopper 15 for preventing the circuit board 13 inserted in the shelf 12 from coming off is fixed to the shelf 12 independently of the cable introducing duct 11.

This stopper 15 is formed by bending a sheet metal into an L-shaped cross section,
As shown in the figure, the mounting legs 15a protruding at both ends are provided with mounting long holes 15a-1, and the L-shaped bent portion 15b is brought into contact with the front surface of the pull-out handle 13a of the circuit board 13 so that the shelf 12 is held. Opening 12a
It is fixed to the left and right frames 12a-2, 12a-3 of FIG.

To introduce the external cable 14, the cable introduction duct 11, that is, the lid 11b of the cable receiver 11a is opened by removing the mounting screw 11c,
The external cable 14 is introduced and held in the cable receiver 11a, and is drawn out from the cable lead-out groove 11b-1 of the lid 11b and connected to the connector.

The circuit board 13 is inserted and removed by loosening the thumbscrew 16 and shifting the stopper 15 downward as shown by the chain double-dashed line in FIG.

The perspective view of FIG. 6 shows a state in which the circuit board of FIG. 4 is pulled out.

[Problems to be solved by the device]

However, according to the above structure, since the lid and the stopper of the cable introduction duct are separately fixed, it is necessary to remove the stopper, insert and remove the circuit board, and open the lid to introduce and connect the external cable. However, there is a problem in that they are troublesome to install and remove, and the structure of the front of the shelf is complicated.

In view of the above problems, the present invention aims to provide a structure of a cable introduction duct that simplifies the structure of the cable introduction duct in the shelf and can improve workability of inserting and removing the circuit board and introducing and connecting an external cable. And

[Means for Solving the Problems]

In order to achieve the above object, the structure of the cable introducing duct of the present invention comprises a cable receiver for introducing and holding an external cable, and a lid having an opening for rotating and opening and closing the opening of the cable receiver and having a cable lead-out groove. The cable introduction duct is arranged in one frame of the opening of the shelf into which the circuit boards are inserted and arranged so that the side edges of the closed lid prevent the circuit boards from coming off.

[Action]

By arranging a cable introduction duct consisting of a cable receiver and a lid that rotates and opens and closes on one side frame of the shelf opening so that the side edge of the lid prevents the circuit board inserted in the shelf from coming off, It is possible to prevent the slip-out and to connect and hold the external cable only by opening and closing the lid, and the side edge of the lid doubles as a conventional stopper, so that the structure can be simplified.

〔Example〕

Hereinafter, the gist of the present invention will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is a perspective view of a main part and an enlarged perspective view and a side view of a portion A of FIGS. 2 (a) and 2 (b). As shown in the side view, the cable introducing duct 1 bends a sheet metal into a groove-shaped (U-shaped) cross section. The gutter-shaped cable receiver 1a and a sheet metal L covering the longitudinal opening
The lid 1b is bent in a cross section and is provided with the cable lead-out grooves 1b-1 in a comb shape at a pitch equal to the arrangement interval of the circuit boards 3.

The cable receiver 1a is welded (or screwed) to one side frame 2a-1 along the arrangement direction of the openings 2a of the shelf 2, that is, the lower side frame.
The lid 1b is fixed to the hinge 1d fixed to the bottom side wall 1a-2 of the cable receiver 1a such that the L-shaped bent portion 1b-3 is pivotally opened and closed.

At this time, as shown in FIG. 2, the cable receiver 1a has a pull-out handle 3a for pulling out the circuit board 3 so that the side edge 1b-2 of the closed lid 1b prevents the circuit board 3 inserted into the shelf 2 from coming off. It is installed at the position where it comes into contact with the front surface of.

Further, the lid 1b is divided (the figure shows three divisions) so that it can be easily opened and closed. Then, the L-shaped bent portions 1b-3 are overlapped with the outer surface of the front side wall 1a-1 of the cable receiver 1a, and the left and right ends are attached with screws.
Secure with 1c (a thumbscrew or thumbscrew that is easy to operate is preferable).

When removing the circuit board 3, as shown in FIG. 2, the mounting screw 1c fixing the lid 1b is removed, the lid 1b is rotated in the direction of the front arrow to open, and the circuit board 3 has its pull-out handle 3a. Pull and pull out.

The perspective view of FIG. 3 shows a state in which the circuit board of FIG. 1 is pulled out.

In addition, the circuit board 3 is inserted into the shelf 2, or the external cable 4 is connected to the cable introduction duct 1, that is, the cable receiver 1a.
When the cable is introduced into the same, the lid 1b is similarly opened to hold the external cable 4 in the cable receiver 1a, and the cable lead-out groove 1b-1 of the lid 1b is held.
Pull out from the predetermined circuit board 3, that is, 3-1 or 3-
Connect to connector 2.

In this way, the cable introduction duct is provided with a lid that can be opened and closed, and the cable introduction duct is arranged so that the side edge of the lid prevents the circuit board from coming off. It is possible to perform the stop and the introduction and connection of the external cable, the conventional stopper can be omitted, and the configuration can be simplified.

[Effect of device]

As described above in detail, according to the present invention, the conventional stopper can be eliminated and the structure of the cable introduction duct can be simplified, so that the manufacturing cost can be reduced, and the insertion and removal of the circuit board and the introduction and connection of the external cable can be achieved. It has an extremely useful effect in practice, such that the workability of can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment according to the present invention, FIGS. 2 (a) and 2 (b) are enlarged perspective views and side views of a portion A of FIG. 1, and FIG. 3 is a circuit of FIG. FIG. 4 is a perspective view showing a state in which the substrate is pulled out, FIG. 4 is a perspective view of a main part according to the prior art, and FIGS. 5 (a) and 5 (b) are enlarged perspective views and side views of a portion B of FIG. 4, and FIG. FIG. 6 is a perspective view showing a state where the circuit board of FIG. 4 is pulled out. In the figure, 1 is a cable introduction duct, 1a is a cable receiver, 1b is a lid,
1b-1 is a cable guide groove, 1b-2 is a side edge, 2 is a shelf, 2a
Indicates an opening, 2a-1 indicates a side frame (lower frame), 3 indicates a circuit board, respectively.

Claims (1)

[Scope of utility model registration request] A cover (1b) having a cable receiving groove (1a) for introducing and holding an external cable (4) and a cable lead-out groove (1b-1) which is opened and closed by covering the opening of the cable receiving (1a). A cable introduction duct (1) consisting of a circuit board (3)
The side edge (1b-2) of the closed lid (1b) keeps the circuit board (3) from coming off in the one side frame (2a-1) of the opening (2a) of the shelf (2) in which the inserts are arranged. The structure of the cable introduction duct, which is characterized in that