JPH09275286A - Electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an extra length of a connection cable, to contrive a reduction in a voltage drop between a back board and internal equipments, and also to contrive a miniaturization of a case body. SOLUTION: An electronic equipment is formed into a constitution, wherein a connector 9a is connected with internal equipments 2 via a connection cable 8a, a connector 9b connected with a back board 6 of a rack box 3 via a connection cable 8b is mounted to a connector panel 9b provided on the front surface of the box 3 and the connector 9a is fitted in the connector 9b, whereby the board 6 is made to have continuity with the equipment 2. By making it possible that at the time of maintenance, the fitting of the connector 9a into the connector 9b is released to draw out the box 3 from the front surface of a case body 1, an extra length, which has been hitherto necessary, of the cable 8a is eliminated and at the same time, the need to provide a space for housing the component of the extra length of the cable 8a in the rear surface side of the case body 1 is also eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device in which a shelf box for mounting a printed wiring board or the like needs to be pulled out from the front side of a housing for maintenance, and in particular, the shelf box and other internal devices. It is related to the structure for connecting.

[0002]

2. Description of the Related Art An electronic device such as a communication device, which is formed by housing a shelf box containing a plurality of printed wiring boards and the like in an enclosure together with internal devices such as a power supply unit, is installed in a narrow space or on the back side of the device. When installing in a place where there is no space for people to walk in, it is necessary to have a structure in which maintenance is performed from the front side.

FIG. 4 is a perspective view showing a conventional electronic device of this type, and FIG. 5 is a perspective view showing a state during maintenance thereof. In the figure, 1 is a housing of an electronic device, 2 is an internal device such as a power supply unit which is housed and fixed in the upper stage of the housing 1, and 3 is a housing 1.
It is a shelf box stored in the lower part of the inside. The front of the shelf box 3 is opened, and the shelf box 3 is detachably fixed to the housing 1 side by a screw 5 inserted through a hole of a mounting portion 4 provided so as to project on both sides thereof.

A backboard 6 is provided at the rear of the shelf box 3, and a plurality of printed wiring boards 7 mounted in the shelf box 3 are electrically connected to the backboard 6. The connection cable 8 is connected to the backboard 6, and the connection cable 8 is connected to the internal device 2 on the front side of the housing 1, whereby the printed wiring board 6 in the shelf box 3 is It is electrically connected to the internal device 2.

In the electronic device having such a configuration, the front surface of the housing 1 is covered with a cover (not shown) in a normal state. And the cover is removed during maintenance,
After the screw 5 is removed, the shelf box 3 is pulled out from the inside of the housing 1 as shown in FIG. 5, and the shelf box 3 and the backboard 6 are maintained and adjusted.

[0006]

However, the above-mentioned conventional techniques have the following problems to be solved. That is, in the conventional structure, in consideration of pulling out the shelf box from the inside of the housing at the time of maintenance, the connection cable connecting the backboard and the internal device has an extra length. It is difficult to visually confirm how the connection cable for the extra length is stored when the storage cable is fixed and the connection cable is between the shelf box and the housing, or between the metal fittings not shown. There is a risk that it will be pinched by and damage the connection cable.

In addition, since the distance between the internal equipment and the backboard of the shelf box becomes long due to the extra length of the connecting cable, the voltage drop becomes large and the power consumption becomes large, and the connecting cable is used as a signal line. In that case, there is a problem in that it is easily affected by noise. Furthermore,
Since a space for accommodating the extra length of the connection cable is required on the rear surface side of the housing, there is also a problem that the housing becomes large.

[0008]

In order to solve such a problem, the present invention stores a shelf box having a backboard in a housing having a front opening and fixes the backboard in the housing. In the electronic device, which is configured to contact the internal device via a connection cable, and the shelf box is pulled out from the front surface of the housing at the time of maintenance, the first connector is connected to the internal device via the first connection cable. The second connector, which is connected to the backboard via a second connection cable, is attached to the front side of the shelf box, and the first connector and the second connector are fitted to each other, so that the back is connected. An electronic device, wherein a board is electrically connected to the internal device.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of an electronic device according to the present invention, and FIG. 2 is a perspective view showing a state during maintenance thereof. In the figure, 1 is a housing, 2 is an internal device, 3 is a shelf box, 4 is a mounting portion, 5 is a screw, 6 is a backboard, 7 is a printed wiring board, and these are the components shown in FIGS. 4 and 5. Since they correspond to, the same reference numerals are used.

In this embodiment, the connection cable (first connection cable) 8 connected to the internal device 2 on the front side of the housing 1 is used.
The connector (first connector) 9a is attached to a, and the connector panel 10 is provided on the upper front surface of the shelf box 3, and the connector (second connector) 9b paired with the connector 9a is fixed to the connector panel 10. In addition, the connector 9b is connected to the backboard 6 by a connection cable (second connection cable) 8b.

Reference numeral 11 in the drawing denotes a bundle band, and the cable 8b is fixed by the bundle band 11 along the outer surface of the shelf box 3. In this embodiment having such a configuration, as shown in FIG. 1, a shelf box 3 having a plurality of printed wiring boards 7 mounted therein is housed in a housing 1 and fixed with screws 5 to form a connector 9a. By fitting 9b, shelf box 3
The printed wiring board 6 therein is electrically connected to the internal device 2, and in a normal state, the front surface of the housing 1 is covered with a cover (not shown).

At the time of maintenance, the cover is removed, the screw 5 is removed, and the fitting between the connectors 9a and 9b is released.
The shelf box 3 is pulled out from the inside of the housing 1, and the shelf box 3, the backboard 6 and the like are maintained and adjusted. 3A and 3B are views for comparing the present invention and a conventional technique. FIG. 3A is a side sectional view of an electronic device of the present invention, and FIG. 3B is a side sectional view of a conventional electronic device.

As shown in FIG. 3 (a), in the present invention, the connection cable 8b need only have a length that is slightly longer than the depth of the shelf box 3, and it is not necessary to have an extra length. As in the conventional structure shown in FIG. 3B, the connection cable 8 is routed from the front side of the internal device 2 to the back side of the shelf box 3 and then the extra length L for pulling out the shelf box 3 is increased. Since the cable length can be shortened by that much, and the voltage drop between the power supply unit 2 and the shelf box 3 can be reduced, the power consumption of the entire device can be reduced.

Further, it is not necessary to provide a space for accommodating the extra length of the connection cable on the rear surface side of the housing 1, so that in the present invention, the depth of the housing 1 becomes the dimension D2 shorter than the conventional dimension D1 "D1- The device can be downsized by the length of "D2".

[0015]

As described above, according to the present invention, a shelf box having a backboard is housed in a housing having a front opening, and the backboard is connected to an internal device fixed in the housing. In a electronic device having a configuration in which the shelf box is brought out from the front of the housing at the time of maintenance, the first connector is connected to the internal device via a first connection cable, and the backboard is connected to the first connector. The second connector connected via the second connection cable is attached to the front side of the shelf box, and the first board and the second connector are fitted to each other so that the backboard is electrically connected to the internal device. Because of the configuration, it is possible to pull out the shelf box from the front surface of the housing by releasing the fitting of the first connector and the second connector during maintenance.

Therefore, in the present invention, it is not necessary to make the connection cable wait for an extra length as in the conventional case, and the connection cable is sandwiched between the shelf box and the housing or the metal fitting when the shelf box is stored. The effect of preventing scratches is obtained. In addition, since it is not necessary to make the connection cable wait for an extra length, the voltage drop can be reduced, and the power consumption of the entire device can be reduced, and even when the connection cable is a signal line. The effect of being less susceptible to noise is also obtained, and there is no need to provide a space for storing the extra length of the connection cable on the rear surface side of the housing, which also has the effect of reducing the size of the housing. Will be things.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an electronic device according to the present invention.

FIG. 2 is a perspective view showing a state during maintenance of the embodiment.

FIG. 3 is a diagram for comparing the present invention with a conventional technique.

FIG. 4 is a perspective view showing a conventional technique.

FIG. 5 is a perspective view showing a state at the time of maintenance of a conventional technique.

[Explanation of symbols]

 1 Housing 2 Internal Equipment 3 Shelf Box 6 Backboard 7 Printed Wiring Board 8a, 8b Connection Cable 9a, 9b Connector 10 Connector Panel

Claims (1)

[Claims] 1. A housing box having a backboard is housed in a housing having a front opening, and the backboard is brought into contact with an internal device fixed in the housing via a connection cable. During maintenance. In an electronic device in which a shelf box is pulled out from the front surface of the housing, a first connector is connected to the internal device via a first connection cable, and a backboard is connected to the internal device via a second connection cable. An electronic device, wherein the second connector is attached to the front side of the shelf box, and the backboard is electrically connected to the internal device by fitting the first connector and the second connector.