JPH046238Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to electronic devices, and more specifically, to electronic devices such as graphic display devices, which include a power supply unit, multiple printed wiring boards, and the like. The present invention relates to a controller forming part of an electronic device, preferably a workstation, having a motherboard and a plurality of printed wiring boards removably connected to the motherboard.

<Prior art> Electronic devices such as graphic display devices have traditionally had strong demands for multi-functionality and faster processing, and in order to satisfy these demands, the size of the printed wiring board itself has been increased. It has become common practice to reduce the number of printed wiring boards and shorten signal lines.
In addition, it has become possible to further shorten signal lines and downsize the entire device by connecting multiple printed wiring boards, which have become larger as described above, via a motherboard. ing.

The general configuration of such an electronic device is as follows.
As shown in the figure, a power supply unit 22 is attached to a predetermined position of a casing 21, and a mother board 2 is electrically connected to the power supply unit 22 by a harness 24 that is close to the power supply unit 22 and has almost no space.
3 is attached, and a printed wiring board 25 connected to the mother board 23 via a connector 26 is detachably attached.

Therefore, when inspecting the operating state of an electronic device, diagnosing a faulty location, or replacing a faulty printed wiring board 25, by removing the printed wiring board 25,
This has the advantage that necessary measures can be easily taken or the printed wiring board 25 can be easily replaced.

<Problems to be solved by the invention> In the electronic device having the above configuration, the printed wiring board 25 can be easily removed, but the mother board 23 has almost no free space due to the harness 24. Since the mother board 23 is connected to the power supply section 22 in a state in which the mother board 23 is not connected, if it becomes necessary to inspect the mother board 23, it is necessary to release the connection state by the harness 24 and take out the mother board 23. Become. In other words, actually inspecting the motherboard requires dismantling the entire electronic device, which requires significantly more labor than inspecting the printed wiring board. The problem is that it takes time.

<Purpose of the invention> This invention was made in view of the above-mentioned problems, and aims to provide an electronic device that can easily inspect not only printed wiring boards but also motherboards. The purpose is

<Means for Solving the Problems> To achieve the above object, the electronic device of this invention includes a power supply unit containing built-in power supply components, a motherboard, and a removable unit connected to the motherboard. and a control unit incorporating a plurality of printed wiring boards, the motherboard being attached to the bottom of the control unit,
The control unit is tiltably attached to the upper surface of the power supply unit.

<Function> In the electronic device with the above configuration, the control unit is attached to the top of the power supply unit, and the mother board is attached to the bottom of the control unit, so the printed wiring board can be inserted from above. By doing so, each printed wiring board can be connected to the motherboard, and each printed wiring board can be extracted by pulling the printed wiring board upward.

By tilting the control unit with respect to the power supply unit, the mother board attached to the bottom of the control unit can be exposed to the outside.

<Examples> Hereinafter, examples will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a perspective view showing an embodiment of the electronic device of this invention, FIG. 2 is a plan view, and FIG. 3 is a longitudinal sectional front view. There is.

To explain in more detail, the above power supply unit 1
has built-in power supply components such as a step-down transformer, a rectifier, an output terminal 8, and a harness 7, and is equipped with a cooling fan and the like as necessary.

The control unit 2 has a motherboard 3 attached to the lower surface of a cylindrical body having a rectangular planar shape, and a plurality of pairs of guide members 10 provided on the inner surface of the cylindrical body to face each other. , a plurality of printed wiring boards 4 each supported in a removable manner.
have. Note that 9 is a power supply terminal. Also,
The lower predetermined position of the cylindrical body is in the upright state.
The part that is screwed to the casing of the power supply unit 1 and that may come into contact with the casing of the power supply unit 1 during the tilting operation (described later) is removed (not shown) to ensure smooth tilting operation. I am trying to make it possible for them to do this.

A hinge member 5 is attached close to the upper surface of one side of the power supply unit 1, and the other end of the hinge member 5 is connected to a predetermined position on the lower surface of the control unit 2. A supporting leg member 6 having a length equal to the distance from the lower surface of the power supply unit 1 to the hinge member 5 is rotatably attached to a predetermined position on the side surface which becomes the lower surface side when the power supply unit 1 is tilted.

Furthermore, a predetermined position of the harness 7 is fixed to a location near the hinge member attachment location of the power supply unit 1, and one end of the harness 7 is connected to the output terminal 8.
is connected to. The other end of the harness 7 is connected to a power terminal 9 of the control unit 2. Therefore, whether the control unit 2 is in an upright position or in a tilted position, the distance from the fixed point of the harness 7 to the power terminal 9 hardly changes, and the harness 7 can be In addition to being able to reduce the length to the minimum necessary,
It is possible to reliably prevent the inconvenience that tension is applied to the harness 7 regardless of the state of the control unit 2.

The operation of the electronic device having the above configuration is as follows.

While the electronic device is operating normally, the control unit 2 stands on top of the power supply unit 1, and the harness 7 is passed from the output terminal 8 of the power supply unit 1 to the power supply terminal 9 of the control unit 2. A power supply voltage is supplied, and signals are exchanged between the printed wiring boards through the mother board 3.

In addition, if inspection or repair becomes necessary in the case that an electronic device stops working properly, first remove each printed wiring board 4 and check whether or not a failure has occurred in the printed wiring board 4. , and if necessary, check the location of the failure, and if a failure is found or the failure location is found, replace the corresponding printed wiring board 4 or replace the printed wiring board 4. By replacing the installed abnormality generating element, it is possible to return the electronic device to a state in which it can operate normally.

In addition, if the failure cannot be found with each printed wiring board 4 alone, remove the screws between the cylindrical body and the casing of the power supply unit 1 while all printed wiring boards 4 are connected to the motherboard 3. Thereafter, by tilting the control unit 2 around the hinge member 5, the lower surface of the mother board 3 is exposed to the outside, and signal waveforms etc. sent and received through the mother board 3 can be inspected. It is possible to check whether a failure has occurred. In this case, the supporting leg member 6 is rotated so that it is perpendicular to the cylindrical body, and the control unit 2 is held in a state where it is tilted approximately 90 degrees.

Furthermore, in the case where the electronic device stops operating normally, if no abnormality has occurred in any of the printed wiring boards 4, the lower surface of the motherboard 3 is exposed to the outside in the same manner as described above.

In this state, whether or not a failure has occurred in the mother board 3, and if necessary,
Inspect where the failure has occurred, and if the failure or failure location is found, replace the motherboard 3 or repair the failure location of the motherboard 3, and restart the electronics. The device can be put into a state where it can operate normally.

Furthermore, if the electronic device ceases to operate normally, the first step is to tilt the control unit 2 and
It is also possible to narrow down the target range to be inspected by inspecting the signal waveforms, etc. of each part, and then inspect the corresponding printed wiring board 4. In this case, the effort required for inspection as a whole can be omitted. .

<Effects of the invention> As described above, this invention allows the control unit, which has a motherboard attached to the bottom and a printed wiring board connected to the motherboard to be removed, to be tiltable relative to the power supply unit. Because of this, you can easily inspect the printed wiring board by removing it, and you can also easily inspect the motherboard by tilting the control unit and exposing the bottom of the motherboard to the outside. It has the unique practical effect of being able to perform inspections as well.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the electronic device of this invention, FIG. 2 is a plan view, and FIG. 3 is a longitudinal sectional front view.
FIG. 4 is a schematic diagram showing a conventional example. 1...Power supply unit, 2...Control unit, 3
...Mother board, 4...Printed wiring board, 5...
Hinge member, 10... Guide member.

Claims (1)

[Scope of utility model registration request] It has a power supply unit containing power supply components, a control unit containing a motherboard and a plurality of removable printed wiring boards that are connected to the motherboard, and the motherboard is attached to the bottom of the control unit. An electronic device characterized in that the control unit is attached to the upper surface of the power supply unit so as to be tiltable via rotation support means.