JPS6025756Y2 - magnetic bubble memory device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a cassette-type magnetic bubble memory device that is detachably inserted into a main unit including a bubble driving circuit and a bubble reading circuit.

Magnetic bubble devices that use magnetic bubble memory to store information, perform logical operations, etc. have various features such as non-volatile high storage density, low power consumption, small size and light weight, and even completely eliminate mechanical elements. Since it is a solid-state device that does not contain any metal, it has very high reliability, and therefore there are great expectations for its future use in terminal device memories and the like.

In particular, when magnetic bubble memory is used as a storage medium for terminal equipment memory, such as a portable data recorder,
Among the above-mentioned features, being small and lightweight is the most important.

Against this background, recently, a method has been devised in which the magnetic bubble memory is separated from the main unit consisting of its drive circuit, reading circuit, etc. to form a cassette, and the cassette-shaped magnetic bubble memory device is attached to and removed from the main unit. .

With this method, information can be easily carried around, and due to the nature of magnetic bubble memory, a relatively large amount of information can be stored in a compact case, so information can be input directly to the central processing unit at the site where the data is generated. It is expected to be even more effective in improving the efficiency of administrative processing.

FIG. 1 is a diagram for explaining one circuit configuration as an example used in this type of method.

In the figure, 30 indicates a cassette-shaped magnetic bubble memory device, and 40 indicates a main unit.

50 is a bubble chip, magnetic bubble generator G1 divider s
It is equipped with functional parts such as P, detector S, and eraser A.

In the figure, the magnetic bubble memory has a single-loop configuration, but the same applies even if it has a major/minor loop configuration.

60 is a connector, and 70 is a rotating magnetic field generating coil consisting of an X coil and a Y coil arranged so as to cover the bubble chip 50.

41 is a connector for the connector 60 on the cassette 30 side, 42 is a coil drive circuit for supplying a sine wave current, a triangular wave current, etc. to the coil 7 to generate a rotating magnetic field along the bubble chip surface, and 43 is a bubble. Reading circuit, 4
4 is a magnetic bubble control circuit, which includes a bubble writing circuit that applies current to the magnetic bubble generator G to generate bubbles, a circuit that applies current to the divider SP to divide the bubbles, and a circuit that applies current to the detector S to check the presence or absence of bubbles. circuit to detect and eraser A
The device includes a circuit that applies electricity to eliminate unnecessary bubbles.

45 is a control circuit for controlling the coil drive circuit 42, the bubble reading circuit 43, and the magnetic baffle control section 44 based on command signals from the central processing unit.

Further, 46 is a register, and 47 is a current circuit.

With this configuration, a portable cassette-type magnetic bubble memory device with a relatively small capacity can be connected to the main device via a connector and operated as necessary.

Conventionally, such a cassette-type magnetic bubble memory device can be removed more easily than the main unit, so removing the cassette-type magnetic bubble memory device while a rotating magnetic field is generated can destroy the contents of the magnetic bubble memory. However, there are disadvantages in that the information content changes during reading or writing by the main unit, reducing reliability.

In addition, the cassette-type magnetic bubble memory device is lightweight and easy to carry, so it can be inserted and removed from the main device relatively often.
It was easy to accidentally insert the left and right sides of the cassette in reverse when inserting the cassette.

Therefore, in order to prevent reverse insertion into the main unit, the connector joint surface of the cassette is made into a trapezoid, and even if the cassette is attempted to be inserted into the main unit in the opposite direction, the structure is such that reverse insertion is impossible because the shape is different.

However, if the cassette is reversely inserted with strong force, the gate pin on the connector's mating surface may come into contact with the connector's mating surface on the main unit, destroying the bubble memory, and contact cannot be avoided simply by having a trapezoidal mating surface. There was a problem that it was not possible.

The purpose of the present invention is to provide a cassette-type storage device with a structure using magnetic bubbles that is simple, lightweight, and easy to carry.In order to eliminate the above-mentioned drawbacks, the purpose of the present invention is to provide a locking mechanism and a cassette that prevent the cassette from being removed while a rotating magnetic field is being generated. It is prohibited to insert the cassette into the main body in the opposite direction when inserting the cassette.

An object of the present invention is to provide a cassette-type magnetic bubble memory device provided with a cassette holder having a reverse insertion prohibition mechanism.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 2 to 9.

Fig. 2 is a perspective view of the external appearance of the magnetic bubble memory device according to the present invention in a plane direction, Fig. 3 is a perspective view of the external appearance of the magnetic bubble memory device in the bottom direction, Fig. 4 is an exploded perspective view, and Fig. 5 is a magnetic bubble memory device. FIG. 6 is a cross-sectional view of the memory device mounted on the main device, FIG. 6 is a side view of the magnetic bubble memory device viewed from the connector surface direction, and FIG. 7 is a cross-sectional view of the magnetic bubble memory device viewed from the insertion direction when inserted into the main device. FIG. 8 shows a detection circuit diagram for detecting that the magnetic bubble memory device is correctly inserted into the main unit, and FIG. 9 shows a configuration diagram having a cassette status display function.

The same reference numerals used in the figures from FIG. 2 to FIG. 9 indicate the same thing.

In FIGS. 2 to 4, 1 and 2 are box-shaped molded upper and lower cases, 3 is a recess, 4 is a slide plate that is a write-protection member, 5 is a magnetic bubble memory, and 6
is a printed board, and 7 is a connector.

The upper case 1 has a recess 3 at the insertion end of its outer surface,
A slide plate 4 is slidably attached within the recess 3.

Furthermore, by integrating the upper case 1 and the lower case 2, an opening 8 is provided on the insertion end surface to expose the connector 7, and a guide groove 9 with different groove widths on both sides to prevent incorrect insertion is provided.
A magnetic bubble memory storage case is formed at the rear end portion thereof, and has a groove 11 for preventing slipping to facilitate attachment and detachment, and a recess 11 for locking the cassette made of the cases 1 and 2 to the main unit.

The magnetic bubble memory 5 includes a bubble chip (not shown), a rotating magnetic field generating coil for moving the bubble inside the bubble chip, a bias magnetic field generating magnet for stably holding the bubble inside the bubble chip, and a disturbance. It is formed to include at least a shield case for protecting information in the bubble from magnetic fields.

Then, by mounting the magnetic bubble memory 5 and the connector 7 on the printed board 6 and housing them in the space formed by the upper case 1 and the lower case 2, a cassette-shaped magnetic bubble memory device according to the present invention can be obtained. It will be done.

First, a locking mechanism that prevents a cassette inserted into the main unit from being removed while a rotating magnetic field is being generated will be described with reference to FIGS. 3 and 5.

In FIG. 5, reference numeral 21 denotes a cassette 20 consisting of cases 1 and 2, a main body device, 19 a cassette locking halter 112, an operation bar 13 for operating the holder 19, a handle, 14 a stopper for fixing the operation bar, and 15 a stopper for fixing the operation bar. A drive circuit for the stopper 14, 16 a spring that supports the halter 19, 17 a spring that supports the operating bar, 18 a connector on the main unit side that connects to the connector plug 7 of the cassette 21, and a the support contact of the holder 19. The symbol indicates the support point of the operation bar 12.

As shown in FIG. 5, when inserting the cassette 21 into the main unit 20, the operating lever 12 is pressed down by pressing down on the handle 13.
rotates around the support point a, and rotates the holder 19 around the support point a.

Next, after inserting the cassette 21 into the main unit 20, the handle 13
When released, the holder 19 and the operation bar 12 are returned to their original positions by the springs 16 and 17.

The main device 20 outputs a drive signal to the drive circuit 15 when accessing the cassette 21 and generating a rotating magnetic field.

The drive circuit 15 pushes up the stopper 14 in response to a drive signal, fixes the operating lever 12, and holds the holder 19, whereby the cassette 21 is locked by the claw of the holder 19 fitted in the recess 11, and the cassette 21 is It can be made non-removable.

When the cassette 21 is not used, the drive circuit 15 does not operate and the cassette 21 can be removed by pressing down on the handle 13.

In this way, the cassette type magnetic bubble memory device can be attached to and removed from the main unit, and while the cassette type device is in use, that is, while generating a rotating magnetic field, the cassette type device is locked to the main unit, and the cassette can be removed while the rotating magnetic field is being generated. It is possible to prevent the destruction of the magnetic bubble memory and the malfunction of the main unit due to this.

Although the shape of the locking mechanism recess 11 shown in the cassette 21 is square in the embodiment, the shape is not limited to this embodiment.

Further, it is also possible to make the holder a slidable rotary body by the relationship between the collar of the locking mechanism and the holder, and directly lock the holder with a stopper.

Further, the structure of the above embodiment may be reversed, in which the cassette 21 is provided with a protrusion as a locking mechanism, and the main body device 20 is provided with a recess that fits into the protrusion.

In addition, the detection device for detecting whether the main unit is correctly inserted into the cassette type magnetic bubble memory device, the detection device for detecting the operating status, etc., and their display functions are shown in FIGS. 6, 8, and 9. explain.

A and B in Fig. 6 are cassette insertion state detection terminals, 23 in Fig. 8 is an insertion state detection device, E is an inverter, and F
is a NAND circuit, C is an output terminal, and 2 in Fig. 9
Reference numeral 4 indicates an indicator lamp that is displayed based on the output signal of the insertion state detection device 23, 25 indicates an operating state detection device for the magnetic bubble memory device, and 26 indicates a status display lamp.

As shown in FIG. 8, when the cassette 21 is properly inserted, the signals obtained from the A line and the B line are input to the NAND circuit F by inverters D and E and output to the output terminal C.

This output signal lights up the indicator lamp 24 in FIG.

In this way, it is possible to display on the lamp that the cassette 21 is correctly inserted into the main unit 20, and as shown in FIG. Therefore, the connection of the connector when the cassette 21 is inserted can be detected very accurately.

Further, as shown in FIG. 9, the cassette is provided with a circuit that sends back to the main unit 20 a signal that distinguishes whether a read operation or a write operation is being performed by the main unit 20, and the main unit 20 detects the insertion of the cassette. Similar to the circuit, the status inspection circuit 25 displays the information on the display lamp 26.

With the above configuration, the insertion state and operating state of the cassette can be visually displayed on the lamp, and there is an effect that it is possible to provide a cassette type magnetic bubble memory device that is easy to use even on a man-machine interface.

Next, FIGS. 6 and 7 show the mechanism for preventing reverse insertion of the guide groove 9 when inserting the cassette shown in FIG. 2 into the main unit.
This will be explained using figures.

As mentioned earlier, Figure 6 shows the third
7 is a side view of the figure, and FIG. 7 is a cross section viewed from the insertion direction when inserted into the main body device.

Guides 91' and 92' having different groove widths in FIG. 7 are guide rails that engage with guide grooves 91 and 92, respectively, provided on the main unit.

The joint surface of the connector 7 shown in FIG. 6 has a trapezoidal shape, so that even if an attempt is made to reversely insert the cassette into the main unit, the insertion is prohibited because the shape is different.

Further, as shown in FIG. 7, guide rails 91' and 92'
The guide rails and guide grooves are configured so that if the cassette is inserted into the left and right guide grooves 91 and 92 incorrectly, the cassette cannot be inserted at all.

As described above, according to the present invention, the locking mechanism that prevents the cassette-type bubble memory device from being removed while a rotating magnetic field is being generated can prevent bubble destruction and malfunction of the main device.

Furthermore, by changing the width of the left and right grooves that engage the guide rails of the cassette bubble memory device, it is possible to prevent bubble destruction due to incorrect insertion.

Furthermore, these mechanisms have the advantage of having a simple configuration and increasing the reliability of the device.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating the circuit configuration used in the bubble memory system of the present invention, FIG. 2 is an external perspective view of the magnetic bubble memory device according to the present invention, and FIG. 3 is a magnetic bubble memory device. Figure 4 is an exploded perspective view, Figure 5 is a cross-sectional view of the magnetic bubble memory device mounted on the main unit, and Figure 6 is a side view of the magnetic bubble memory device as seen from the connector side. Figure 7 is a sectional view seen from the insertion direction when inserted into the main unit, Figure 8 is a detection circuit diagram for detecting that the magnetic bubble memory device is correctly inserted into the main unit, and Figure 9 is a detection circuit diagram for detecting that the magnetic bubble memory device is correctly inserted into the main unit. The figure shows constituent countries that display the insertion status of magnetic bubble memory devices. Explanation of symbols, 1, 2... Case, 5...
・Magnetic bubble memory, 9... Guide groove, 11.
... hollow, 19 ... holder

Claims (4)

[Scope of utility model registration request] (1) A magnetic bubble that is detachably inserted into the main unit including a bubble driving circuit, a bubble writing circuit, a bubble reading circuit, etc., and is composed of a bubble chip, a rotating magnetic field generating coil, and a bias magnetic field generating magnet. In a cassette-shaped magnetic bubble memory device formed by housing a memory in a case, when the magnetic bubble memory device is inserted into the main device and the magnetic bubble memory is driven by the main device, Magnetic Publume (I
A magnetic bubble memory device characterized in that the J device has a structure that cannot be pulled out from the main device. (2) A depression is formed on the surface of the case, and a claw portion of a holder provided on the main device is engaged with the depression, so that the magnetic bubble memory device cannot be pulled out. Scope of claim for utility model registration No. 1
The magnetic bubble memory device described in Section 1. (3) The magnetic bubble memory device according to claim 1, which is a registered utility model, characterized in that a locked state in which it is difficult to pull out the magnetic bubble memory device is displayed by a lamp on the main unit. (4) Guide grooves having different groove widths are formed on the side surfaces of the case, and the guide grooves prevent erroneous insertion into the main body device. Magnetic bubble memory device.