JPH0638315B2 - Magnetic bubble memory device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic bubble memory device, and more particularly to a new board cassette system suitable for increasing the memory capacity by mounting a multi-chip.

[Background of the Invention]

As a cassette type of a conventional magnetic bubble memory device, as described in Japanese Patent Publication No. 59-47386, a storage medium composed of a bubble chip and a bias magnetic circuit is separated from a main body device having a drive coil and the like. Something to use is suggested. However, in this method, since the drive coil is fixed to the main unit and it was necessary to fix it due to the structure of the device, it is not possible to have a moving mechanism, and when reading / writing the memory, the drive coil Since the bubble cassette is inserted between the bubble chip and the bias magnetic circuit, and at the same time it is necessary to connect the connector section, the drive coil and the bubble cassette have no choice but to have a one-to-one structure. No consideration was given to the storage medium structure (multi-cassette structure) in which a large number of storage media composed of a bias magnetic circuit and

[Object of the Invention]

It is an object of the present invention to provide a magnetic bubble memory device that is a cassette type and has a large memory capacity by collecting a large number of storage media composed of bubble chips and bias magnetic circuits.

[Outline of Invention]

The present invention provides a cassette-type magnetic bubble memory device that achieves a large capacity. Therefore, a drive coil for generating a rotating magnetic field, which is fixed to a main body device, is newly provided with a moving function, and a bubble chip and a bias magnetic circuit are used. The present invention is characterized in that a drive coil is moved to perform writing and reading on an arbitrary storage medium of a cassette type storage medium group in which a large number of storage mediums that are configured are collected.

Example of Invention

An embodiment of the present invention will be described below with reference to FIG. A board cassette in which nine modules 2 each containing a bubble chip and bias magnetic field generating means and shielded by a first shield means 1 made of a conductor are mounted on a plane on a wiring board 4 having a second shield means 3 made of a conductor. A has achieved a large capacity of the memory. The connector portion 6 of the board cassette A is provided for exchanging electrical signals with the main body device (not shown). Further, an electric circuit (switching circuit) 5 is provided on the wiring board 4 so as to have a function of selecting the terminals of the module 2 for nine pieces, and the number of the pin terminals 7 of the connector portion 6 is set to the electric power of the module 2 and the wiring board 4. The number of terminals is less than nine times the number of terminals required for transmitting and receiving signals. By reducing the number of terminals of the connector portion 6, the reliability of the electrical contact structure is improved. Furthermore,
The board cassette A is provided with a packaging case 9 (see FIG. 2) that can be attached and detached by a groove 8 provided on the side surface, and improves the environmental resistance of the first shield means 1 and the second shield means 3 and the like. Also, the handleability of the board cassette A is improved.

FIG. 2 shows a main body device 10 to which a board cassette A having a packaging case 9 is mounted. Main unit 10
Is a drive coil head unit 11 incorporating a rotating magnetic field generating means for transferring bubbles in a bubble chip and a third shield means made of a conductor partially surrounding the rotating magnetic field generating means.
A support rod 12 for horizontally and vertically moving the drive coil head 11 with respect to the surface of the mounted board cassette A, and a drive mechanism 13 having a built-in solenoid or the like, and a connector portion of the mounted board cassette A. It is composed of a peripheral circuit portion 15 having a connector portion 14 to which the pin terminals 7 of 6 are connected. The drive coil head unit 11 and the drive mechanism 13 are electrically controlled by the peripheral circuit unit 15.

When the board cassette A is inserted into the insertion opening 17 provided in the main body device 10 and connected to the connector portion 14, the packaging case 9 can be removed from the board cassette A by a mechanical mechanism described later. After removing the packaging case 9, the drive coil head portion 11 moves with respect to the surface of the board cassette A, and the first shield means 1 and the second shield means 1 made of the conductors of the module 2 selected by the system. The shield means 3 and the third shield means (not shown in the figure) made of a conductor provided in the drive coil head portion 11 are electrically connected to read / write the memory of the board cassette A.

When the board cassette A is taken out from the main body device 10, the packaging case 9 is inserted into the insertion port 17 again, and the board cassette A is housed in the packaging case 9 and can be taken out by a mechanical mechanism described later.

FIG. 3 shows the structure of the packaging case 9.

FIG. 4 is a sectional view of the module 2 connected to the wiring board 4 of the board cassette A. The module 2 includes a bubble chip 18, a bias magnetic field generating means including a magnet plate 19, a magnetic shunt plate 20, a magnetic shield case 21, and a tilt plate 22 for holding bubbles in the bubble chip 18, and the bias magnetic field. The first shield means 1 made of a conductor surrounding the generating means, and the flexible wiring board 26 in which the bubble chip 18 via the reinforcing plate 23 and the external terminal 24 fixed by the mold resin 25-2 are connected. ing.

FIG. 5 is a partially cutaway perspective view showing the structure of the bias magnetic field generating means. The structure of the magnetic shield case 21 is such that the upper flat plate 21-1, and the lower flat plate 21-2 are the columns 21-3 (a, b,
The above-mentioned bias magnetic field generating means is configured so as to be connected by four (c, d) and magnetic flux Φ shown by broken lines 27-1 and 27-2 (3 and 4 are omitted) is generated, and the bubble chip 18 A bias magnetic field is applied to. On the other hand, the rotating magnetic field H _R for transferring the valve in the bubble chip 18 is given from the openings 28-1, 28-2, 28-3, 28-4 on the side surface of the magnetic shield case 21.

In Fig. 4, the rotating magnetic field supplied from the direction of arrow 29.
H _R is surrounds the first shielding means 1 comprising the bias magnetic field generating means from the conductor for preventing the influence of the bias magnetic field generating means including a magnetic shield case 21. As a result, the rotating magnetic field H _R is magnetically separated from the bias magnetic field generating means by the eddy current (induced current) generated in the first shield means 1 made of a conductor and supplied to the bubble chip 18. In addition, the flexible wiring board 26
Is closely attached to the first shield means 1-2 made of a conductor to reduce induced noise. Further, since the back surface of the module 2 is electrically connected to the board cassette A, the second shield means 3 is provided in addition to the external terminals 24 for signal lines.
The electrodes 30-1 and 30-2 are formed of a part of the first shield means 1 facing each other.

FIG. 6 shows the back surface of the module 2, which is an electrode composed of the external terminal 24 and a part of the first shield means 1.
30 are arranged. The flexible wiring board 26 connected to the external terminals 24 is bent near the corners 31 of the module 2 and connected to the bubble chip 18.

FIG. 7 shows a sectional structure of the module 2 connected to the wiring board 4 in the board cassette A. Module 2-
The electrical connection between the first shield means 1-2 of 1 and the second shield means 3 of the wiring board 4 is formed on the electrode 30 of the module 2-1 and a part of the second shield means 3 of the wiring board 4. It is carried out via the solder 33 with the formed electrode 32. Also,
The external terminals 24 of the module 2-1 and the counter electrodes 34 for signal lines formed on the wiring board 4 are also connected by the solder 35. A contact structure may be used as an electrical connection method for the shield means and the signal line so that the module 2 can be attached to and detached from the wiring board 4.

FIG. 8 is a diagram showing a rotating magnetic field generating means in the drive coil head portion 11. Windings 37 are provided on four sides of a frame-shaped ferrite core 36. Winding set 37-2, 37-4 and 37-1,
The leakage magnetic fields 38-1 and 38-2 (not shown in the figure) are generated by the 37-3, respectively, and the rotating magnetic field can be supplied to the bubble chip 18 (not shown in the figure) arranged inside the ferrite core 36. Is configured. Instead of the ferrite core 36, an amorphous metal having excellent impact resistance may be used.

FIG. 9 shows the structure of the third shield means 39 made of a conductor partially surrounding the rotating magnetic field generating means. The third shield means 39 is electrically connected to the first shield means 1 and the second shield means 3, so that the third shield means 39 has inner connection surfaces.
40, the outer connecting surface 41 has contact pins 42 and 43 provided with springs.

By using the contact pin provided with the spring, the contact state of each pin (a good state with low contact resistance) can be maintained independently. When the inner connection surface and the outer connection surface without springs are brought into direct contact with the first and second shield means, it is difficult to ensure uniformity because the connection surfaces are wide. Therefore, in the present invention, the contact pins provided with springs are arranged on the connection surface as means for allowing each pin to absorb the non-uniformity of the connection surface independently.

FIG. 10 shows a sectional view of the drive coil head portion 11. The rotating magnetic field generating means in which the winding 37 is applied to the ferrite core 36 is covered with a resin mold 44, and is attached inside the third shield means 39 made of a conductor. An inner reinforcing plate 45 and an outer reinforcing plate 46 are used to reinforce the third shield means 39 and to fix the drive coil head portion 11 to the support rod 12 which is moved by the drive mechanism 13. In order to make the drive coil head portion 11 attachable / detachable to / from the support rod 12, a groove 47 is provided in a part of the connecting surface of the inner reinforcing plate 45 and the outer reinforcing plate 46 so as to facilitate the separation / coupling.

FIG. 11 shows a connection structure between the board cassette A and the drive coil head portion 11 at the time of reading / writing the memory.
The second shield means 3 made of a conductor provided on the wiring board 4, the first shield means 1 made of a conductor provided on the module 2, and the third shield means made of a conductor provided on the drive coil head portion 11. The shield means 39 is connected and contacted by the solder 33 and the contact pins 42 and 43 so as to form one closed loop 48 shown by a broken line. The bubble chip 18, the rotating magnetic field generating means composed of the ferrite core 36 and the winding wire 37 is a conductor composed of the first shield means 1, the second shield means 3 and the third shield means 39. By arranging it in the shield space, the rotating magnetic field H _R49 shown by the dashed arrow is efficiently supplied to the bubble chip 18.

FIG. 12 shows another embodiment showing the connection structure between the board cassette A and the drive coil head portion 11 at the time of reading / writing the memory. In contrast to the first shield means 1-2 of the module 2 mounted on the board cassette A and the second shield means 3 formed on the wiring board 4, the third shield means 39 of the drive coil head 11 is used. So that the provided contact pins 42 and 43 are connected on the same plane,
It is formed so that the electrode surface 51 of the second shield means 3 provided on the wiring board 4 is aligned with the electrode surface 50 formed on the first shield means 1-2. By connecting the board cassette A and the drive coil head portion 11 on one plane, the structure of the drive coil head portion 11 can be simplified and downsized, and the reliability of connection and contact is improved. Further, by providing, for example, a brush portion inside the packaging case 9 that is attached to and detached from the board cassette A, brushing of the electrode surfaces 50 and 51 formed on one plane can be performed and electrical contact can be made. The reliability of can be improved.

The attachment / detachment of the board cassette A to / from the main unit 10 will be described. FIG. 13 is a partial plan sectional view showing a process of inserting the board cassette A into the main body device 10. Here, the packaging case 9 of the board cassette A is provided with a spring 61 for urging and pressing the wiring board 4 therein, and the packaging case 9 of FIG. 14 (the board cassette A of FIG. 13 is viewed from above the paper surface). As shown in the drawing), a notch 62 having a width slightly larger than the plate thickness of a locking member 72, which will be described later, and an oval hole 63 connected to this are provided on one side surface. On the other hand, the wiring board 4 housed inside the case 9 is provided with a locking piece 65 whose upper limit of biasing is the position shown in FIG.

The upper half of FIG. 13 is a mechanical mechanism for attaching and detaching the board cassette A, and its operation will be described below. FIG. 13 shows the connector portion 6 of the board cassette A and the connector portion of the main body device 10.
The board cassette A is inserted up to the state where 14 is connected. When the board cassette A is further pressed from this state, the wiring board 4 holds the above position, but the case 9 further advances while compressing the spring 61. The rotating portion 67 provided on the main body device 10 is rotated clockwise by the pressing portion 66 of the case 9. 68 is a fulcrum of rotation of the rotating piece 67, and 69
Is a spring for biasing the rotating piece 67 in the counterclockwise direction, and 70 is its stopper. Along with the rotation of the rotating piece 67, the locking member 72 rotates counterclockwise. That is, the rotating piece 67 and the locking member 72 are engaged by the pin 71 implanted in the rotating piece and the elongated hole 73 provided in the locking member 72. The locking member 72 rotates about a rotation shaft 74 as a fulcrum and is urged downward by a spring 75 in the drawing. The rotating shaft 74 is the chassis
It is fitted in a long hole 81 provided in 80 so that it can move up and down.

By the rotation of the locking member 72 in the counterclockwise direction,
The locking end 72a of the locking member 72 passes through the notch 62 of the case 9 and eventually presses the locking piece 65 provided on the wiring board 4 to
The state of the figure is reached. That is, the locking end 72a is fitted into the hole of the locking piece 65 of the wiring board 4 and is in a locked state. It goes without saying that the pressing force of the spring 75 outweighs the repulsive force of the spring 64.

When the case 9 is pulled after reaching this locked state, only the case 9 is detached while the locked state is maintained and the wiring board 4 remains in the main body device. Then, the drive coil head portion 11 becomes movable.

Next, extraction of the wiring board 4 will be described. To do this, first the release button 76 is pressed against the spring 79. Then, the taper portion 78 of the release piece 77 connected to the release button 76 pushes up the rotating shaft 74 of the locking member 72 against the force of the spring 75, and the locking end 72a is pushed out of the hole of the locking piece 65. Will come out. Thereafter, the restoring force of the spring 69 acts, and the locking member 72 and the rotating piece 67 return to the state shown in FIG. Of course, the force relationship of the springs at the time of returning is set so that the force of the springs 69 is higher than that of the springs 75. However, in the locked state described in FIG. 15, the pulling force of the spring 69 is suppressed by fitting the locking end 72a into the hole for the locking piece 65.

After returning the locking end 72a and the locking piece 65 to the state shown in FIG. 13, the case 9 may be inserted into the main body device 10. To explain with reference to FIG. 13, when the case 9 advances, the front edge of the notch 62 pushes down the locking piece 65 against the spring 64, and eventually the oval hole 63 reaches the position of the locking piece 65. , The locking piece 65 projects again as shown in FIG. When the case 9 is pulled out again in this state, the front edge of the oval hole 63 engages the locking piece 65, that is, the wiring board 4.
13 is moved to the right side in the figure, and the wiring board 4 is removed from the main body device 10 while being housed in the case 9.

〔The invention's effect〕

According to the present invention, a board cassette structure that achieves a large memory capacity by collecting a large number of storage media composed of bubble chips and bias magnetic circuits, a read / write operation of the cassette memory, and a moving mechanism are provided. Since it is possible to realize a new board cassette system consisting of a main body device composed of the drive coil head part, etc., it is a handy type and large capacity that maximizes the characteristics of the magnetic bubble memory with good environmental resistance. It can provide memory, which is extremely effective in industry.

[Brief description of drawings]

The drawings are all related to the present invention. FIG. 1 is a perspective view of a board cassette without a packaging case, and FIG. 2 is a perspective view of a board cassette and a main body device. FIG. 3 is a perspective view of a packaging case of a board cassette, FIG. 4 is a sectional view of a storage medium module mounted in the board cassette, and FIG. 5 is a perspective view of bias magnetic field generating means which is one component of the module. , FIG. 6 is a back view of the module. 7 is a sectional view of a part of the board cassette, FIG. 8 is a perspective view of the rotating magnetic field generating means, FIG. 9 is a perspective view of the third shielding means, and FIG. 10 is a rotating magnetic field generating means and the third shield. It is sectional drawing of the drive coil head part containing a means. 11 and 12 are sectional views showing a structure in which the board cassette and the drive coil head portion are connected. FIGS. 13 and 15 are plan views for explaining the attachment / detachment relationship between the board cassette and the main body device, and FIG. 14 is a partial perspective view of the board cassette. A: Board cassette 1 ... First shield means 2 ... Module 3 ... Second shield means 4 ... Wiring board 5 ... Switching circuit 6 ... Connector section 9 ... Packaging case 10 ... Main unit 11 …… Drive coil head 13 …… Drive mechanism 14 …… Connector 15 …… Peripheral circuit 18 …… Bubble chip 19 …… Magnetic plate 20 …… Magnetic compensator 21 …… Magnetic shield case 36 …… Ferrite core 37 ... Winding 39 ... Third shield means

Claims (6)

[Claims] 1. A plurality of magnetic bubble memories each comprising a bubble chip, a means for generating a bias magnetic field for holding a bubble in the bubble chip, and a first shield means surrounding the bias magnetic field generating means. A bubble cassette including at least a wiring board that connects modules on the surface and is connected to the first shield means on a part of the connection surface of the second shield means, and transfer of bubbles in the bubble chip. And a third shield means for partially enclosing the rotating magnetic field generation means, the main body device having a drive unit, the first and second shield means and the third shield means. The drive section is incorporated in the wiring board so as to connect the shield means of No. 3, and the bubble chip and the rotating magnetic field generating means are the first, second and third seals. Magnetic bubble memory device characterized by being configured to be positioned in one of the space formed by the means. 2. The drive unit connects a mechanism for horizontally moving to an arbitrary magnetic bubble memory module position with respect to the wiring board, the first and second shield means, and the third shield means. The magnetic bubble memory device according to claim 1, further comprising a vertically moving mechanism for separating. 3. The magnetic bubble memory device according to claim 1, wherein the magnetic bubble memory module is configured to be attachable to and detachable from the wiring board. 4. The first and second shield means and the third shield means are electrically connected to each other through a plurality of connecting means acting independently of each other. The magnetic bubble memory device according to claim 1. 5. The magnetic bubble memory device according to claim 1, wherein a switching circuit for the plurality of magnetic bubble memory modules is provided in the wiring board. 6. The second shield means provided on the wiring board and the first shield means provided on the magnetic bubble memory module.
2. The magnetic bubble memory device according to claim 1, wherein among the shield means, the connection surfaces connected to the third shield means provided in the drive section are formed on the same plane. .