KR100253040B1 - A recording/reproducing apparatus - Google Patents

Abstract

PURPOSE: To provide various kinds of individual information regarding the recording medium cassette to a recording/reproducing device and/or to record various kinds of individual information regarding the recording medium cassette. CONSTITUTION: A recessed part is formed on the inside surface of bottom wall of the tape cassette 1, and a printed circuit board 11 provided with four terminals 12 and mounted with an IC 13 is engaged with the recessed part for fixing, then four terminals are separately connected to a power source terminal, clock terminal, input/output terminal and earth terminal of the IC respectively. The terminals are fronted onto the outside through a fronting hole 10 which is formed on the bottom wall 7 of tape cassette. Detection terminals 30 connected to respective signal input/output terminals of a power source, earth, clock and microcomputer, are provided on a VTR 14. When the tape cassette is loaded on the VTR, the detection terminals are brought into contact with the terminals of tape cassette, then the information being recorded in the IC is read by the microcomputer and also the information is written into the IC as necessary.

Description

Record and playback device

1 is a perspective view of a recording medium cassette suitable for use in the recording / reproducing apparatus according to the present invention.

FIG. 2 is an enlarged fragmentary sectional view of the main portion of the recording medium cassette of FIG.

3 is a perspective view of an IC plate suitable for use in combination with the record carrier cassette of FIG.

4 is a perspective view of a terminal plate suitable for use in combination with the recording medium cassette of FIG.

5 is a schematic perspective view of an essential part of the mechanical chassis included in the recording / reproducing apparatus according to the present invention.

6 is a perspective view of a connector fixedly mounted to the mechanical chassis of FIG.

7 is a block diagram of an IC plate to be mounted on a recording medium cassette suitable for use in combination with the recording / reproducing apparatus according to the present invention.

Fig. 8 is a circuit diagram of a voltage setting circuit for setting a voltage connecting the recording / reproducing apparatus and a recording medium cassette equipped with an IC.

9 is a diagram of a terminal plate to be mounted on a recording medium cassette suitable for use in the recording / reproducing apparatus according to the present invention.

10 is a circuit diagram of a recording / reproducing apparatus according to the present invention.

11 shows a recording medium cassette equipped with a recognition hole.

* Explanation of symbols for main parts of the drawings

2: case 4: IC plate

13, 29: recess 15: IC chip

18: conductor 28: flexible cable

Background of the Invention

Field of invention

The present invention relates to a recording / reproducing apparatus or a reproducing apparatus such as a video tape recorder (hereinafter abbreviated as "VTR") or a video cassette recorder (hereinafter abbreviated as "VCR"). In particular, the present invention relates to a recording / reproducing apparatus or a reproducing apparatus capable of giving information on a recording medium cassette to a recording / reproducing apparatus and recognizing a recording medium cassette capable of recording information or a recording medium cassette providing information. It is about.

Related technical description

Records used by the VTR or VCR, including the length of the tape, the available capacity of the tape, the conditions of the tape, i.e. whether or not the information was recorded on the tape, the category of the tape, i.e. whether the tape is a rental video tape Special information about the media cassette is essential for preventing illegal use of the tape by recording the number of dubbings, for correct recording, and for preventing important data corruption recorded on the tape.

Thus, the special information is stored in a specific area in the tape, such as a sub code area, and a part of the information is changed or additional information is recorded when the picture recording or picture reproduction is completed in the recording / reproducing apparatus or from the VTR or VCR. Applies to pre-recorded information when removing. Some record carrier cassettes are provided with recognition holes for information at opposite ends of the bottom wall.

As shown in Fig. 11, the recording medium cassette A is provided with a plurality of recognition holes C in the opposite corners of the bottom wall indicating its shape and quality. The problem to be displayed, including the thickness of the magnetic tape and the type of the magnetic tape, is assigned to a plurality of recognition holes C, respectively. When the recording medium cassette A is inserted into a recording / reproducing apparatus having a switch with a detection pin, the detection pin is inserted into the recognition hole C, and the recording / reproducing device is recognized from the depth of the recognition hole C detected by the detection pin C. Recognize the information indicated by. In Fig. 11, indicated by d is a position hole.

When information about the recording medium cassette A is desired to be stored in a specific area of the tape included in the recording medium cassette A, it takes time to record information in or read information from the specific area. In particular, when recording information in a specific area, the tape needs to be rewound after image recording or image reproduction is completed to set the specific area at a recording position, which is not an efficient way of recording information in a specific area of the tape.

Tape cassettes with IC chips for storing information on record carrier cassettes are disclosed in U.S. Patent No. 4,338,664, July 6, 1982 (Theo P.C. J. L. Starr), and U.S. Patent No. 4,383,285, May 1983. Il (Theopieel C. J. L. Starr), U.S. Patent No. 4,426,684, January 17, 1984 (Cloud Secret et al.) And U.S. Patent No. 4,839,875 June 13, 1989 (Genki Kuriyama et al.) Described.

Although the above-described recording medium cassette easily stores information about the recording medium cassette, the IC chip increases the price of the recording medium cassette. It may be economical to use both a relatively expensive record carrier cassette with an IC chip called an IC record carrier cassette and a relatively cheap record carrier cassette having only a terminal plate having a plurality of terminals to be called a terminal record carrier cassette. . The plurality of terminals are connected by conducting wires to the plate in a circuit pattern representing special information about the recording medium cassette. The two types of record carrier cassettes should allow a user to use the two types of record carrier cassettes without identification. Therefore, an IC-type recording medium cassette with an IC and a terminal-type recording medium cassette with a terminal plate should be able to be automatically recognized, or the recording medium cassette will not be widely used.

Therefore, when the recording medium cassette is inserted into the recording / reproducing apparatus, whether or not the recording medium cassette is equipped with an IC chip, information about the recording medium cassette should be automatically converted into corresponding data.

Summary of the Invention

Accordingly, it is an object of the present invention to provide a recording / reproducing apparatus for recording information on a recording medium cassette and reproducing the recorded information, wherein the recording / reproducing apparatus can identify the first recording medium cassette and the second recording medium cassette. A first recording medium cassette is provided with an IC chip and a plurality of terminals formed on the surface thereof and connected to the IC chip, and the second recording medium cassette has no IC chip and the first recording medium cassette is provided. A plurality of terminals formed on its surface is provided at a position corresponding to the terminals of the recording medium cassette.

Since the recording / reproducing apparatus can automatically identify the recording medium cassette with IC and the recording medium cassette with terminals, the IC type recording medium cassette with IC and the terminal type recording medium cassette with terminals can be compatible with each other. The recognition means recognizes the recording medium cassette by an electric value unique to the recording medium cassette. The recognition means can form a simple circuit when the electrical value is a voltage.

Voltage signals appearing at a plurality of terminals of the recording medium cassette connected to the circuit pattern by conducting wires can be used for recognition.

Unnecessary operation of the microcomputer can be omitted by recognizing the recording medium cassette almost simultaneously with the recording medium cassette being inserted into the recording / reproducing apparatus.

Thus, without using a switch or any similar special means, the recording / reproducing apparatus can identify the IC type recording medium cassette and the terminal type recording medium cassette, so that the user can use different types of recording medium cassettes in a mess, The recording / reproducing apparatus has a simple configuration. The cassette recognition circuit uses a voltage signal for recognizing a recording medium cassette having a simple circuit configuration.

Part of the specific information about the terminal record carrier cassette can be indicated by connecting the terminals in an appropriate circuit pattern and there is no need for a recognition hole in the bottom wall of the record carrier cassette, which reduces the cost and the size of the record carrier cassette.

The above and other objects, features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Detailed description of the preferred embodiment

Referring to FIG. 1, the recording medium cassette 1 is a case 2, a pair of tape reels 3 disposed in the case 2, a terminal 5 located in the case 2 and accessible from the outside. Has an IC plate 4 equipped. The case 2 is formed into a flat rectangular box shape by tying together the upper half case 6 and the lower half case 7 together. The bottom wall 8 of the lower half case 7 has holes 9 for receiving projections of the pair of tape reels 3, terminal slots 10 which pass through when the terminals 5 of the IC plate 4 are accessed; A mouse 11 is formed in which a magnetic tape (not shown) included in the case 2 extends. The front opening of the case 2 is covered with a turning lid 12. The magnetic tape is wound on the tape reel 3.

2 and 3, the IC plate 4 includes a printed wiring board 14, a terminal 5 formed on the printed wiring board 14, and a printed wiring board 14. As shown in FIG. It includes an IC chip 15 mounted on. The IC plate 4 is located in a thin, substantially rectangular recess 13 formed in the inner surface of the bottom wall 8 of the case 2 in the middle of the rear part of the bottom wall 8. Four terminal slots 10 are arranged sideways in the recess 13. The IC plate 4 fits correctly in the recess 13. The plurality of rectangular terminals 5 elongated in the width direction of the case are arranged on the printed wiring board 14 of the IC plate 4 in the longitudinal direction of the case 2, in order to match with the terminal slots 10, respectively. to be. The terminals 5 are gold plated to ensure durability and reliability. The IC chip 15 is mounted on the printed wiring board 14 of the IC plate 4 and connected to the terminal 5 in a circuit pattern by conducting wires. As an example, terminal 5a is a power supply terminal, terminal 5b is a data I / O terminal, terminal 5c is a clock terminal, and terminal 5d is a ground terminal. The IC plate 4 is fixedly fitted to the recess 13 of the case 2, but the IC plate surface is provided with a terminal 5 facing down and an IC chip 15. As shown in FIG. The IC plate 4 is fixed to the bottom wall 8 by adhesive or welding.

Referring to FIG. 4, the terminal plate 16 has a printed wiring board 14, a terminal 17, and a conductive wire 18 connecting the terminal 17. The recognition output terminals 17a, 17b and 17c are connected in advance to the ground terminal 17d in a predetermined combination representing information about the recording medium cassette 1. Three recognition terminals (17a, 17b, and 17c) may indicate the information about the recording medium ²³ of the cassette 1. The terminal plate 16 is fixed to the recess 13 of the case 2 in a manner similar to the fixing of the IC plate 4 to the recess 13.

A recording / reproducing apparatus suitable for using a recording medium cassette with an IC chip and a recording medium cassette with a terminal will be described later, wherein the recording medium cassette with an IC will be referred to as an IC type recording medium cassette, and a recording medium with a terminal. The cassette will be referred to as a terminal type record carrier cassette.

Referring to FIG. 5, the recording / reproducing apparatus 19 includes a cabinet 20 and a mechanical chassis 21 disposed in the cabinet 20. The mechanical chassis is equipped with a drum 22, a reel table 23 and a connector 24. When a recording medium cassette, i.e., an IC type recording medium cassette or a terminal type recording medium cassette, is inserted into the recording / reproducing apparatus 19, the terminal 5 or the terminal 17 coincides with the detection terminal 26 of the connector 24. do.

As shown in FIG. 6, the connector 24 includes a casing 25, a detection terminal 26, a shaft for supporting the detection terminal 26 on the case 25 with a pivot axis, and a connector ( And a flexible cable 28 for connecting a signal to a power source and transmitting a signal. The case 25 is formed of an insulating material such as a synthetic resin and is provided with a recess 29 that opens up and down. The groove 30 is formed in front of the bottom surface of the recess 29 to form a protrusion 31 at the front end of the recess 29. The support walls 32 are laterally arranged at regular intervals along the rear end of the recess 29 to form a space between the side walls of the recess 29 and the support wall 32 and a space 33 between the support walls. The position recesses 34 are formed with protrusions 31 at positions respectively corresponding to the support walls 32. The attached protrusion 35 is formed at the midpoint of the front end of the case 25. The position projection 36 provided with the recess 37 is formed at an intermediate point of the rear end of the case 25. The through hole 38 is formed in the lower wall of the case 25 at a position between the space 33 and the protrusion 31 so as to correspond to the space 33.

The terminal 26 is formed by bending the conductive spring wire into a twisted coil spring shape. Each terminal 26 has a coil portion 39, a lower arm 40, and an upper arm 41. The free end of the lower arm 40 is bent at a right angle to form the connecting end 42. The connecting end 42 is fitted into the hole 38 of the case 25 and connected to the conductive wire 46 of the flexible cable 28. The front part of the upper arm 41 is bent in the shape of inverting the letter 'V' to form the contact portion 43. The ends of the upper arm 41 are each inserted into the position recess 34.

The coil portion 39 of the detection terminal 26 is at the bottom surface of the case 25 and the supporting wall 32 having the lower arm 40 extending along the bottom surface of the recess 29 of the case 25. Coincides with the space 33 between the ends of the connecting portion 42 projected downward. The distal end of the upper arm 41 is movable in the position recess 34.

The connector 24 thus formed is placed in the mechanical chassis 21 with the recess 37 of the position protrusion 36 engaged with the position protrusion 44, and the attachment protrusion 35 is removed from the mechanical chassis 21. It is secured to the mechanical chassis 21 with the screw 45 tightened through it.

The extension cable 28 connects the connector 24 to the circuit of the recording / reproducing apparatus including the microcomputer. The detection terminal 26 of the connector 24 is connected to the conducting wire 46 of the extension | stretching cable 28, respectively.

When the recording medium cassette 1 is placed in the cassette holder (not shown) of the recording / reproducing apparatus 19, the recording medium cassette 1 is engaged with the reel table 23 of the recording / reproducing apparatus 19. The hole 12 of the tape reel 3 is lowered. In this state, the terminals 5 or 17 of the recording medium cassette 1 come into contact with the contact portion 43 of the detection terminal 26, respectively. When pressed by the terminal 5 or 17 of the recording medium cassette 1, the upper arm 41 of the connector 24 is flexed downward and the contact portion 43 of the detection terminal 26 is connected to the recording medium cassette. Move forward slightly relative to terminal (5) or (17) of (1). Thus, the detection terminal 26 is in elastic contact with the terminal 5 or 17 of the recording medium cassette 1 to avoid incomplete contact. When the IC type recording medium cassette equipped with the IC plate 4 is inserted into the recording / reproducing apparatus 19, the supply voltage is applied to the power supply terminal 5a of the printed wiring board 14 and supplied by the microcomputer. The applied signal is applied to the data I / O terminal 5b, the clock signal is applied to the clock terminal 5c, the ground signal is applied to the clock terminal 5c, and the ground signal is applied to the ground terminal 5d. Then, the data read operation is started.

When the terminal-type recording medium cassette 1 equipped with the terminal plate 16 is inserted into the recording / reproducing apparatus 19, the supply voltage Vcc passes through the resistors R101, R102 and R103 to the terminals 17a, 17b and 17c. is applied to each terminal (17d) is disclosed a recognition operation and then being connected to ground via a terminal (P _4).

The IC plate 4 or the terminal plate 16 of the recording medium cassette 1 is inserted into the recording / reproducing apparatus 19, and the circuit configuration and circuit operation of the recording / reproducing apparatus 19 will be described later.

Referring to FIG. 7, the IC plate 4 fixedly disposed in the IC-type recording medium cassette 1 includes terminals 5, that is, a power supply terminal 5a, a data I / O terminal 5b, and a clock terminal. 5c and the ground terminal 5d, the IC chip 47 and the resistor R are included. The power supply terminal 5a is connected to the IC chip 47 and one end of the resistor R, the data I / O terminal 5b and the clock terminal 5c are connected to the IC chip 47, and the ground terminal 5d is It is connected to the IC chip 47 and the remaining end of the resistor R.

IC chip 47 includes a memory (not shown) and a central processing unit (CPU) (not shown). The memory includes a ROM / RAM that stores data supplied by the CPU and provides address data designated by the CPU. The CPU communicates with the recording / reproducing apparatus 19 and the internal memory. The CPU communicates with the recording / reproducing apparatus 19 in a serial data transfer mode having a data transfer rate of 1 to 2 Mb / sec via the data I / O terminal 5b. The CPU serves as an interface for reading data from internal memory and converting the data into serial data. The CPU communicates with the internal data in parallel communication mode for fast internal processing as determined by the data bus of the ROM / RAM. The operation of the CPU is controlled by a clock signal applied to the CPU via the clock terminal 5c. The operating speed of the CPU depends on the frequency of the clock signal. Therefore, a clock signal having a higher frequency can increase the data transfer speed when applied to the CPU.

The resistor R and the IC chip 47 are connected in parallel to the power supply terminal 5a in order to distribute the supply voltage applied to the power supply terminal 5a by the recording / reproducing apparatus 19. The voltage appearing at the power supply terminal 5a is about half of the supply voltage Vcc.

By way of example, as shown in FIG. 8, one end of the resistor R101 is connected to a power supply having a supply voltage Vcc of 3V and the other end is connected to the terminal P ₁ .

When connecting the IC plate 4 to the recording / reproducing apparatus 19, the power supply terminal 5a and the ground terminal 5d are extended for each of the terminals P ₁ and P ₄ of the recording / reproducing apparatus 19. When supply voltage Vcc is applied across terminals P ₁ and P ₄ , current I ₁ flows through IC chip 47 and current I ₂ flows through resistor R. The values of the resistors R and R101 are determined so that the potential of the power supply terminal 5a becomes about half of the supply voltage Vcc, for example, 3V, that is, 1.5V, by the following equation.

(I ₁ + I ₂ ) R101 = 1.5 (V) ... (1)

I ₂ R = 1.5 (V) ... (2)

The current I ₁ depends on the current capacity of the IC chip 47. For example, when I ₁ = 3mA and I ₂ = 6mA, it can be seen that R101 167Ω in Equation (1) and R = 250Ω in Equation (2). If the potential 1.5V of the power supply terminal 5a and the current I ₁ are stable, the resistor R can be omitted. The resistance values of the resistors R and R101 need to be determined based on the voltage capacity of the IC chip 47 and the supply voltage Vcc of the recording / reproducing apparatus 19.

As shown in FIG. 9, the terminals 17a, 17b and 17c of the terminal plate 16 of the terminal type record carrier cassette 1 serve as recognition terminals. Terminal 17 is connected in a circuit pattern by lead 18 to achieve a recognition signal. For example, when the terminal 17 is connected to a circuit pattern as shown in FIG. 9, the signals HIGH, LOW and HIGH appear at the recognition terminals 17a, 17b and 17c, respectively.

Accordingly, the terminal-type recording medium cassette 1 provided with the terminal plate 16 has a terminal 17 and a conducting wire 18. Since the recognition terminal 17a is open, the potential of the rest terminal 17a becomes equal to the supply voltage Vcc when the recognition terminal 17a is connected to the power supply of the recording / reproducing apparatus 19 via the resistor R101. Since the recognition terminal 17b is connected to the ground terminal 17d, the potential of the recognition terminal 17d becomes equal to the ground potential. The recording / reproducing apparatus 19 detects each potential of the recognition terminal 17, and identifies the terminal-type recording medium cassette 1 from the combination of the potentials of the recognition terminal 17 among the eight combination portions. A cassette identification circuit for distinguishing between an IC type record carrier cassette provided with an IC plate 4 and a terminal record carrier cassette provided with a terminal plate 16 is described below.

10 shows a circuit for reading the contents of the IC plate 4 and the terminal plate 16. The cassette identification circuit 49 identifies the recording medium cassette 1 automatically inserted into the recording / reproducing apparatus 19 by a signal provided through the connector 24. The communication circuit 48 includes a cassette identification circuit 49, resistors R101, R102 and R103, a switch 50, a terminal assembly 51, an interface 52, and a microcomputer 53.

The power supply having the supply voltage Vcc (3V) is connected to one end of each of the resistors R1 and R3 of the cassette identification circuit 49, one end of each of the resistors R101, R102 and R103, and the collector side of the switch 50.

The cassette identification circuit 49 has comparators 54 and 55, resistors R1, R2, R3 and R4, Schmitt trigger circuits 56 and 57, an inverter 58 and a HAND gate 59. The comparator 54 has a positive input terminal, i.e., a non-inverting terminal, connected to the terminal P1 of the terminal assembly 51, a positive input terminal of the comparator 55, a junction of the other end of the resistor R1 and one end of the resistor R2. It has a connected negative input terminal, that is, an inverting terminal and an output terminal connected to the input terminal of the Schmitt trigger circuit 56. Resistor R2 is grounded. The comparator 55 is connected to a positive input terminal connected to the terminal P1 of the terminal assembly, a negative input terminal connected to the junction of the other end of the resistor R3 and one end of the resistor R4, and an input terminal of the Schmitt trigger circuit 57. It has an output terminal. Resistor R4 is grounded. The resistances of the resistors R1 and R4 are equal to each other, and the resistances of the resistors R2 and R3 are equal to each other, for example, R1 / R2 = 1/3.

Each of the Schmitt trigger circuits 56 and 57 and the inverter 58 has one input terminal and one output terminal. The Schmitt trigger circuit 56 has an input terminal connected to the output terminal of the comparator 54 and an output terminal connected to the input terminal of the comparator 58. The inverter 58 has an input terminal connected to the output terminal of the Schmitt trigger circuit 56 and an output terminal connected to the input terminal of the HAND gate 59. The Schmitt trigger circuit 57 has an input terminal connected to the output terminal of the comparator 55 and an output terminal connected to the input terminal of the HAND gate 59.

The HAND gate has two input terminals and one output terminal, where one of the input terminals is connected to the output terminal of the inverter 58, the other input terminal is connected to the output terminal of the Schmitt trigger circuit 57, and the output The terminal is connected to the memory detection terminal Mdet of the microcomputer 53.

The switch 50, i.e., the switching element, has a collector connected to the power supply, a base connected to the bus control terminal Bcont of the microcomputer 53, and an emitter connected to the terminal P1 of the terminal assembly 51.

Terminals P1, P2, P3 and P4 of the terminal assembly 51 are the terminals 5 of the IC plate 4 of the IC recording cassette, respectively, or the terminals 17 of the terminal plate 16 of the terminal recording cassette. Contact with. The terminal P1 of the terminal assembly 51 is the other end of the resistor R101, the emitter of the switch 50, the positive input terminal of the comparators 54 and 55 of the cassette identification circuit 49, and the recognition terminal of the microcomputer 53. It is connected to RCG1. The terminal P2 is connected to the other end of the resistor R102, the output terminal of the buffer 61 included in the interface 52, the input terminal of the buffer 62 included in the interface 52, and the recognition terminal RCG2 of the microcomputer 53. Connected. The terminal P3 of the terminal assembly 51 is connected to the other end of the resistor R103, the output terminal of the buffer 63 included in the interface 52, and the recognition terminal RCG3 of the microcomputer 53. Terminal P4 of the terminal assembly 51 is grounded.

The interface 52 includes an OR gate 60, buffers 61, 62 and 63 and an interface circuit 64. The OR gate 60 of the interface 52 is connected to the bus control terminal Bcont of the microcomputer 53 and the other input terminal connected to the bus control terminal Bcont of the interface circuit 64 and the input of the buffer 61. It has an output terminal connected to an enable terminal. The buffer 61 of the interface 52 includes an enable terminal connected to the output terminal of the OR gate 60, an input terminal connected to the data-out terminal Dout of the interface circuit 64, and a terminal assembly. It has an output terminal connected to terminal P2 of (51). The buffer 62 of the interface 52 is connected to the input terminal connected to the terminal P2 of the terminal assembly 51 and the output terminal of the buffer 61 and to the data-in terminal Din of the interface circuit 64. It has a connected output terminal. The buffer 63 of the interface 52 includes an input terminal connected to the clock terminal CK of the interface circuit 64, an output terminal connected to the terminal P3 of the terminal assembly 51 and the recognition terminal RCG3 of the microcomputer 53. And an enable terminal connected to the bus control terminal Bcont of the microcomputer 53 and the input terminal of the OR gate 60. The interface circuit 64 of the interface 52 is connected to the bus control terminal Bcont connected to the input terminal of the OR gate, the data-out terminal Dout connected to the input terminal of the buffer 61, and to the output terminal of the buffer 62. It has a data-in terminal Din and a clock terminal CK connected to the input terminal of the buffer 63. The interface circuit 64 is connected to the microcomputer 53 by an internal bus 65 having a serial data-in line Si, a serial data-out line So, a chip select line CE and a clock line CK.

The microcomputer 53 outputs the bus control terminals Bcont and HAND gate 59 connected to the base of the switch 50, the input terminal of the OR gate 60 of the interface 52, and the enable terminal of the buffer 63. IC memory detection terminal Mdet connected to the terminal, recognition terminal RCG1 connected to the terminal P1 of the terminal assembly 51, recognition terminal RCG2 connected to the terminal P2 of the terminal assembly, and recognition connected to the terminal P3 of the terminal assembly 51. It has a terminal RCG3.

At the same time as the insertion of the recording medium cassette 1 into the recording / reproducing apparatus 19, and the connection of the terminal of the recording medium cassette 1 and the detection terminal 26 of the connector 24, that is, the terminal of the terminal assembly 51; The communication circuit 48 determines whether the recording medium cassette 1 is provided to the IC plate 4 by the voltages present at the terminals P1, P2, P3 and P4 of the terminal assembly 51 (FIG. 8).

When the terminal-type recording medium cassette provided with the terminal plate 16 is inserted into the recording / reproducing apparatus 19, the voltage at the terminal P1 of the terminal assembly 51 is 0V or 3V. When the IC type recording medium cassette provided to the IC plate 4 is inserted into the recording / reproducing apparatus 19, the voltage at the terminal P1 is about Vcc / 2 = 3 / 2V = 1.5V. The voltage at terminal P1 of the terminal assembly 51 depends on the resistance R101 and the resistance 4 of the communication circuit 48.

(1) Terminal type record carrier cassette

The communication circuit 48 determines whether the terminal type record carrier cassette has been inserted into the recording / reproducing apparatus 19. The recognition output terminals 17a, 17b and 17c of the terminal plate 16 and the ground terminal 17d are connected to terminals P1, P2, P3 and P4 of the terminal assembly 51 of the communication circuit 48, respectively. Since the recognition terminal 17a is open and the switch 50 is off, the potential of the terminal P1 of the terminal assembly 51 is equal to the supply voltage Vcc (3V). When the recognition terminal 17a is grounded, its potential is about 0V. The voltage signal representing the potential of the recognition terminal 17a is applied to each positive input terminal of the comparators 54 and 55. At that time, the output terminal of the comparator 54 goes HIGH when the voltage at the positive input terminal of the comparator 54 is Vcc (3V). The output terminal of the comparator 55 goes HIGH when the voltage at the positive input terminal of the comparator 54 is Vcc. However, this condition does not satisfy the input condition for the HAND gate 59.

When the potential of the positive input terminal of the comparators 54 and 55 is about OV, the output terminals of the comparators 54 and 55 go low. This state does not satisfy the input condition for the HAND gate 59.

The input condition for the HAND gate 59 is satisfied when the output terminal of the comparator 54 is LOW and the output terminal of the comparator 55 is HIGH. That is, the resistance of the resistor is determined by the comparator 54 not going HIGH and the comparator 55 going HIGH, whereby the supply voltage is supplied to the resistors R1, R2, R3 and R4 (R1 = R4, R2 = R3). The voltage achieved by dividing Vcc is applied to relatively negative input terminals 54 and 55, and the potential of the terminal P1 of the terminal assembly 51 is about 1.5V. Thus, when the potential of the terminal P1 of the terminal assembly 51 is about 3V or about 0V, the input condition to the HAND gate 59 is not satisfied, and the output terminal of the HAND remains HIGH, which causes the microcomputer 53 The memory detection terminal Mdet is HIGH.

When the memory detection terminal Mdet is HIGH, the bus control terminal Bcont of the microcomputer 53 remains at LOW, inhibiting the operation of the interface 52, turning off the switch 50, and supply voltage Vcc through the resistor R101. It is applied to the terminal P1 of the terminal unit 51. The microcomputer 53 is provided with the recognition signal provided at the recognition output terminal 17a of the terminal plate 16 through the terminal P1 at the recognition terminal RCG1, and the recognition signal provided at the recognition output terminal 17b through the terminal P2 at the recognition terminal RCG2. The recognition signal supplied from the recognition output terminal 17c is received through the terminal P3 at the recognition terminal RCG3 so as to identify the recording medium cassette 1. Thus, the microcomputer 53 receives a recognition signal indicating information about the recording medium cassette 1 including the shape and thickness of the magnetic tape of the recording medium cassette 1.

(2) IC record carrier cassette

The communication circuit 48 identifies the IC type recording medium cassette when the IC type recording medium cassette is inserted into the recording / reproducing apparatus 19. When the IC type recording medium cassette is inserted into the recording / reproducing apparatus 19, the power supply terminal 5a, data I / O terminal 5b, clock terminal 5c and ground terminal 5d of the IC plate 4 are inserted. Are connected to terminals P1, P2, P3 and P4 of the terminal assembly 51 of the communication circuit 48, respectively.

As described above with reference to FIG. 8, the power supply terminal 5a is connected to the ground terminal 5d through the IC chip 47 and the resistor R. As shown in FIG. The resistance of the resistor R of the IC plate 4 is determined so that the potential of the terminal P1 of the terminal assembly 51 is about 1.5 V (about Vcc / 2), where the IC plate 4 is connected to the communication circuit 48. . Thus, when the IC plate 4 of the IC-type recording medium cassette is connected to the communication circuit 48, a voltage of about 1.5 V is applied to the positive input terminals of the comparators 54 and 55 of the cassette identification circuit 49. Occurs at terminal P1 of terminal assembly 51 to apply a voltage of V, the output of comparator 54 goes low, and the output terminal of comparator 55 goes high. Therefore, the input condition to the HAND gate 59 is satisfied, and the memory detection terminal Mdet of the microcomputer 53 goes to LOW. When the memory detection terminal Mdet of the microcomputer 53 goes low, the bus control terminal Bcont goes high and the switch 50 is turned ON to supply the supply voltage Vcc (3V) to the terminal P1 of the terminal assembly 51. Proceed to Thus, the supply voltage Vcc (3V) is applied to the IC chip 47 of the IC plate 4 to activate the IC chip 47.

On the other hand, the OR gate 60 of the interface 52 makes the buffers 61 and 63 ENABLE, wherein the bus control terminal Bcont of the microcomputer 53 is the clock terminal CK and the terminal assembly 51 of the interface circuit 64. Proceeds to HIGH to transfer the clock signal to the IC chip 47 of the IC plate 4 through the terminal P3. At that time, the IC chip 47 can communicate with the recording / reproducing apparatus 19.

The microcomputer 53 of the communication circuit 48 transmits a command signal for requesting data transfer via the interface 52 to the IC chip 47 of the IC plate 4, where the IC chip 47 is a terminal assembly. The data is transmitted to the microcomputer 53 via the terminal P2 of 51. When recording data on the IC chip 47 of the IC plate 4 of the IC type record carrier cassette, the microcomputer 53 sends a command signal requesting recording to the data source.

In particular, when data is recorded on the IC chip 47 of the IC plate 4 of the IC type recording medium cassette, the microcomputer 53 reads the data from the IC chip 47 and rents the recording medium by the data. A category of IC type record carrier cassette, such as a cassette or record carrier cassette holding data, is determined. If the recording medium cassette has not yet recorded any data, the IC chip 47 includes the tape length of the recording medium cassette, the effective capacity of the recording medium cassette, the amount of data recorded, and the time and date of recording in the predetermined sequence. The information around the recording medium cassette is recorded.

Data is exchanged between the IC chip 47 and the microcomputer 53 only through the data I / O terminal 5b, and the data of the recording medium cassette is read when the recording medium cassette is inserted into the recording / reproducing apparatus 19. , Data is recorded in the IC chip 47 when the recording or reproducing operation is completed. The cassette identification circuit 49 can automatically identify all possible sizes of record carrier cassettes when the terminals of the IC plate or the terminal plate of the record carrier cassette are formed at the same designated position. The terminals of the IC plate and the terminal plate may be disposed on the rear wall or the side wall of the case instead of the same arrangement on the one wall of the case.

Although the present invention has been described in terms of good shape to some particular extent, various modifications may be made. Thus, the present invention may be practiced otherwise than as described without departing from its scope and spirit.

Claims (6)

A recording / reproducing apparatus for recording information on a recording medium of a recording medium cassette and reproducing information recorded on the recording medium of the recording medium cassette, the IC chip and a plurality of terminals connected thereto are provided, A plurality of first media carriers disposed on the outer surface of the case and at a position corresponding to the positions of the plurality of terminals of the first media carriers to identify between the first and second recording media cassettes. And a cassette identification means capable of identifying a second recording medium cassette provided with a terminal. The recording and reproducing apparatus according to claim 1, wherein the cassette identification means identifies the first recording medium cassette or the second recording medium cassette at the same time as connecting the first recording medium cassette or the second recording medium cassette to the cassette identification means. 3. A cassette according to claim 2, wherein the cassette identification means identifies the first recording medium cassette to an electrical signal generated at a designated terminal among a plurality of terminals of the first recording medium cassette, and the terminal designated among the plurality of terminals of the second recording medium cassette. And a recording and reproducing apparatus for identifying the second recording medium cassette by an electrical signal generated by the second recording medium. The recording and reproducing apparatus according to claim 3, wherein the electrical signal is a voltage signal. 5. The recording and reproducing apparatus as set forth in claim 4, wherein a plurality of terminals of the second recording medium cassette are connected by conducting wires in a circuit pattern representing an information portion relating to the second recording medium cassette. 6. The cassette according to claim 5, wherein the cassette identification means sets an enable state for enabling communication between the IC chip and the recording / reproducing apparatus when the first recording medium cassette is inserted into the recording / reproducing apparatus, and the second recording medium cassette. Recording and reproducing apparatus for reading out an information section relating to a second recording medium cassette when is inserted into the recording / reproducing apparatus.