JPH05341876A - Data processor - Google Patents

Abstract

PURPOSE:To prevent the destruction of the data of an auxiliary device due to the erroneous attachment and detachment of the auxiliary device while the power source of a main body device is supplied. CONSTITUTION:This data processor is equipped with a main body device 5, auxiliary device 6, fixing member 8 which fixes both the devices in an interfit state, and buffer circuit 16 which energizes both the devices based on the fixed state of both the devices by the fixing member 8. Only when the fixed parts of both the devices fixed by the fixing member 8 are electrically brought into contact with each other by the fixing effect of the fixing member 8, both the devices are energized. While the auxiliary device is attached and detached, the contact of the fixed parts is released, and both the devices are electrically interrupted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device using a removable auxiliary device.

[0002]

2. Description of the Related Art In recent years, with the spread of data processing devices for general users, the number of devices using a removable auxiliary device such as a hard disk unit of a notebook personal computer is increasing. The structure of such a data processing device will be described with reference to FIG.

As shown in FIG. 2, the data processing device comprises a main body device 1 and an auxiliary device 2, both of which are fitted at a position of a connector 3. Since it is difficult to hold the fitting of both with only the connector, it is common to fix them with the screw 4 as a fixing member at a position where the fitting is complete. The simpler the fitting structure and the fixing method of the both, the easier the user can attach and detach, and the portability of the auxiliary device and the main body device improves.

[0004]

Such a conventional data processing device tends to be easily attached and detached in order to pursue portability, but conversely, the device is destroyed by an erroneous operation by the user. Causing concern. Specifically, when the auxiliary device is attached or detached while the power of the main body device is on, the auxiliary device may be destroyed. This breakdown is due to variations in signal fitting and removal timings between the main unit and auxiliary devices, and the occurrence of power supply voltage and signal voltage application in the order in which stress is applied to the elements and the variation time (mechanical The main reason is that it can be on the order of milliseconds (due to variations). In the hard disk unit, the data stored inside is often destroyed.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a data processing device for electrically connecting a main body device and an auxiliary device only when the fitting is complete.

[0006]

In order to achieve the above object, a data processing apparatus of the present invention comprises a main body device, an auxiliary device detachable from the main body device, and the main body device and the auxiliary device are completely fitted to each other. And a buffer circuit for electrically connecting the main body device and the auxiliary device to each other by fixing the main body device and the auxiliary device. ..

[0007]

In the data processor of the present invention, the fixing member can be fixed only in the positional relationship in which the main unit and the auxiliary unit are completely fitted together. Therefore, by checking the state of the fixing member, the fitting state of both can be determined. I can know. In the buffer circuit, the two are electrically connected only when they are completely fitted together, so that no voltage is applied to the auxiliary device being attached and detached.
Since the connection and disconnection of the two by the buffer circuit are performed electrically instantly, destruction of the element is avoided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In the figure, when the attachment / detachment portions of the main body device and the auxiliary device are viewed from directly above, the data processing device includes a main body device 5, an auxiliary device 6, a connector 7 for fitting the both, and a fixing member 8 by a conductor screw. The fixing portion 9 on the main body device 5 and the fixing portion 10 on the auxiliary device 6, which are mechanical elements and fixed by the fixing member 8, are formed of conductors that are electrically connected to the fixing member 8. The fixed portion 10 is connected to the ground pin a11 that is the ground pin of the auxiliary device 6 and fits with the ground pin b12 that is the ground pin on the main device 5 side. Further, the plurality of signal pins a13 including the power source of the auxiliary device 6 are fitted to the corresponding signal pins b14 on the main body device 5 side, and the signal pin b1.
4 is connected to a corresponding internal signal 17 via a buffer circuit 16 composed of an analog switch 15. The fitting detection signal 18 for controlling the analog switch 15 is pulled up by the resistor 19 and is connected to the fixed portion 9a. Here, it is assumed that the analog switch 15 is a high-speed type that is cut off (OFF) when the fitting detection signal 17 is high and conductive (ON) when it is low, and the ON / OFF operation is completed in the order of nanoseconds.

The operation of the above configuration will be described. First,
Consider a state in which the auxiliary device 6 is disengaged. At this time, the fixed part 9 is released, the fitting detection signal 18 is high only by pulling up the resistor 19, the analog switch 15 is off,
Therefore, the buffer circuit 16 is in the cutoff state.

Next, it is assumed that the auxiliary device 6 is mounted. At this time, the signal pin a13 and the signal pin b14 are fitted, but the signal pin b14 and the internal signal 17 are still blocked, and the two devices are still in a blocked state. However, since the ground pin a11 and the ground pin b12 are fitted to each other, the fixed portion 10 is already at the low level.

Here, the fixing by the fixing member 8 becomes possible only for the first time. At the moment when the fixing member 8 is attached, the fixing portion 9 and the fixing portion 10 are electrically connected, the fixing portion 9 becomes low according to the low level of the fixing portion 10 and the fitting detection signal 18 is low.
The analog switch 15 is turned on. Main unit 5
After the fitting of the auxiliary device 6 and the auxiliary device 6 is completed, both devices are electrically connected for the first time.

On the contrary, the detaching operation of the auxiliary device 6 may be performed by reversing the present attaching operation in time. At the time of removal of the fixing member 8 prior to disengagement, both devices are instantly shut off and there is no electrical change that occurs at the moment when the auxiliary device 6 is actually disengaged.

As described above, since the analog switch 15 having a high reaction speed is used, it does not matter whether it is attached or detached.
It is possible to suppress the variation in timing of signal fitting and removal in a short time so that it can be ignored, and it is possible to solve the conventional problems.

In the present invention, the fixing member is a conductor screw, but it need not be a screw and need not be a conductor. It suffices that the fixing portions of both devices are brought into conduction due to the fixing effect of the fixing member. For example, the fixing portion of one device is deformed by pushing the fixing member and comes into contact with the other fixing portion.

[0016]

As can be seen from the above embodiments, the data processing apparatus of the present invention electrically disconnects the main unit from the auxiliary unit during attachment / detachment. It is a reduction to the original operation to be performed. Furthermore, since the conventional mechanical structure can be utilized as it is, it is easy to realize, but it is possible to avoid the destruction of the device due to an erroneous operation by the user.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a mechanism and a circuit of a data processing device according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a mechanism of a conventional data processing device.

[Explanation of symbols]

 5 Main device 6 Auxiliary device 8 Fixing member 16 Buffer circuit

Claims (1)

[Claims] 1. A main body device, an auxiliary device that is attachable to and detachable from the main body device, and a fixing member that can fix the main body device and the auxiliary device only when they are in a completely fitted position. A data processing device, comprising: a buffer circuit that electrically connects the main body device and the auxiliary device by fixing the main body device and the auxiliary device.