JP3524210B2 - Recording or playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus such as a video cassette recorder (VCR), and more particularly to a recording / reproducing apparatus using a tape cassette for recording information equipped with a memory device.

[0002]

2. Description of the Related Art For example, in a video tape cassette in which a recording medium such as a magnetic tape is housed in a cassette body,
A discriminating means for discriminating the type of the tape is provided. As a mechanical discriminating means, there is known one in which a detection hole where a detection mechanism on the deck side operates is provided at an appropriate position in a tape cassette so that information such as a tape type can be discriminated by loading a cassette.

On the other hand, in a conventional tape cassette equipped with a memory device for storing information such as tape type, the memory device is housed in a cassette case and the input / output terminals for the memory device are exposed outside the cassette case. Was there. The information in the memory device can be accessed by bringing the input / output terminal of the memory device into contact with the detection contact.

[0004]

However, in the recording or reproducing apparatus using the memory device, when accessing the information stored in the memory device, the memory input / output terminal on the outside of the tape cassette and the recording or reproducing operation are performed during the tape cassette loading operation. It is performed by sliding the detection contact provided on the device side. Therefore, if the memory I / O terminals or the detection contacts are worn unevenly due to the deviation within the mechanical error range when the tape cassette is loaded or the recording or reproducing device and the tape cassette are used for a long period of time, The proper contact state of the input / output terminal and the detection contact cannot be secured,
There is a risk that the accessed information may be erroneous due to noise and the like. The same problem may occur when dust or the like is attached to the memory input / output terminal or the detection contact.

Therefore, an object of the present invention is, in particular, in a recording or reproducing apparatus of information having a detection contact which abuts an input / output terminal of a memory device mounted in a tape cassette body, a recording or reproducing device which always realizes proper reading of information. An object is to provide a reproducing device.

[0006]

A recording or reproducing apparatus according to the present invention acts on a tape wound around a reel of a tape cassette equipped with a memory device, and a predetermined tape path for winding the tape around a rotating drum. A recording or reproducing apparatus comprising: a tape loading means for forming a tape; a tape running means for running the tape along a tape path; and a mechanical drive control means for driving and controlling at least the tape loading means and the tape running means. a memory output terminal abutment means adapted to abut the memory the input and output terminals of the memory device, the memory accesses to said memory device
Memory access control means for reading contents and the mechanical drive
Before and after the operation by the dynamic control means.
Memory content comparison / judgment means for comparing the memory contents read by the memory control means to judge whether the contents are correct or not.

Further, in the recording or reproducing apparatus of the present invention, the memory access control means is arranged such that when the tape cassette is loaded, the memory input / output terminal contact means contacts the memory input / output terminal of the memory device. , The mechanical drive control means operates to access the memory device of the tape cassette at a time point when a preset operation including at least driving of the tape loading means and the tape running means is executed, and the memory contents The comparison / judgment means makes a comparison by using the memory contents obtained when the memory access control means has accessed the memory device a plurality of times, and makes a correct / wrong decision based on the comparison result.

[0008]

According to the present invention, the memory access control means is
When the tape cassette is loaded and the memory input / output terminal contact means contacts the memory input / output terminals of the memory device mounted on the tape cassette body, the VCR mechanical drive control means drives the tape loading means and the tape running means. At the time of executing a preset operation such as driving
It operates to access the memory device mounted on the tape cassette. Further, the memory content comparison / determination means can compare the memory content when the memory access control means accesses the memory device mounted in the tape cassette a plurality of times, and can refer only to the memory content when it is determined that there is no reading error. To work.

The degree of deviation within the mechanical error range when the tape cassette is loaded, the uneven wear of the memory input / output terminal or the memory input / output terminal abutting means due to long-term use of the apparatus and the tape cassette, the memory input / output terminal or the memory It is possible to read the memory information without error in reading the memory information due to the contact failure between the memory input / output terminal and the memory input / output terminal abutting means due to the adhesion of dust to the input / output terminal abutting means.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a recording or reproducing apparatus according to the present invention will be described below with reference to FIGS. Figure 1
FIG. 3 is a block diagram of an information recording or reproducing device (preferably VCR) using a tape cassette equipped with a memory device embodying the present invention. In the figure, 101 is a mechanical control microcomputer for controlling the VCR mechanism.
2 is a tape cassette equipped with a memory device; 103 is a magnetic tape; 104a and 104b are tape guides for winding the magnetic tape 103 around a rotating drum 105;
Is a loading motor for arranging and driving the tape guides 104a and 104b at predetermined positions, 107 is a rotating drum motor, and 108 is a capstan motor for transferring the magnetic tape 103.

Reference numeral 109 denotes a memory device (hereinafter referred to as a cassette memory) mounted on the tape cassette 102, and 110.
Is a memory input / output terminal of the cassette memory 109 exposed to the outside of the tape cassette 102, and 111 is a detection contact provided on the VCR mechanical side, which is made of an elastic material and elastically inputs / outputs the memory. It is in contact with the terminal 110. 112 is a memory control microcomputer for controlling access to the cassette memory 109, and 113
Reference numerals a and 113b are reels on the supply side and the winding side around which the magnetic tape 103 is wound.

The tape loading operation in this recording or reproducing apparatus is as shown in FIG. 1, after the tape cassette 102 is loaded on the slide chassis, the tape guide 1
At the same time that the magnetic tape 103 is pulled out from the opening of the tape cassette 102 by 04a and 104b,
The slide chassis slides toward the rotary drum 105. Then, as shown in the drawing, the tape guide 1
The magnetic tape 103 is wound around the peripheral surface of the rotating drum 105 by 04a and 104b. Thus, according to this recording or reproducing apparatus, recording or reproducing can be performed by running the magnetic tape 103 along a predetermined tape path.

FIG. 2 is a flow chart for explaining the operation of accessing the cassette memory 109 according to the embodiment of the present invention. In this embodiment, the cassette memory 109 is accessed not only after the cassette loading operation but also after the two mechanical operations of the loading operation and the tape transfer operation.

Next, the operation of this embodiment will be described with reference to FIGS. The S201 routine of FIG. 2 (hereinafter simply referred to as “S
201 "is abbreviated. The same applies to other routines. When the tape cassette 102 is loaded in), the memory control microcomputer 112 clears the read error counter to 0 in S202, and proceeds to S203. At S203, the memory control microcomputer 11
2 accesses the cassette memory 109 to read the internal R
The data is read into AM1, and the process proceeds to S204. S2
At 04, the memory control microcomputer 112 accesses the cassette memory 109 to read the data into the internal RAM 2 and shifts to S205. In S205, the memory control microcomputer 112 causes the S203 and S20
The contents of RAM1 and RAM2 read twice in 4 are compared. If the compared contents match, the process proceeds to S206. At the time point after the cassette loading operation in S206, the reading of the cassette memory is successful, so the reading error counter is cleared to 0, and the process proceeds to S209.

If they do not match in S205, S207
Move to. If the read error counter is not 1 in S207, the process proceeds to S208, 1 is added to the read error counter in S208, and S203, S204 and S205 are repeated again.

Therefore, the fact that the read error counter is 1 in S207 means that the comparison results do not match even if the contents of the cassette memory 109 are read twice and compared twice. If the cause of the non-coincidence is a read error due to a poor contact between the memory input / output terminal 110 and the detection contact 111, a means is provided for accessing the cassette memory 109 again after performing a mechanical operation that changes the contact state. That is one of the features of the present invention.

If the read error counter is 1 in S207, the process proceeds to S209. In S209, the mechanical control microcomputer 101 drives the loading motor 106 to execute the loading operation, whereby the tape guides 104a and 104b pull out the magnetic tape 103 from the tape cassette 102 and wind it around the rotary drum 105.

By the way, although the precision of the VCR mechanism and the tape cassette is high, there is always a certain mechanical dimensional error within the allowable range. The supply-side and take-up-side reels 113a and 103b around which the magnetic tape 103 is wound are rotatably held in the tape cassette 102, and V
Since the CR mechanism is provided with a fitting margin with a reel stand (not shown), mechanical vibrations during the loading operation and cassette vibrations when the magnetic tape is unwound from the reel are always generated. Therefore, the contact state between the memory input / output terminal 110 and the detection contact 111 changes.

After the loading operation is completed, the process proceeds to S210. S210 is a routine for determining whether or not the cassette memory 109 has been successfully read at the time after the previous cassette loading operation. If this is successful, S211
If not, the process proceeds to S212. S
The flow from 211 to S213 or S214 is the same as the double reading comparison at the time point after the previous cassette loading operation except that the RAMs to be read are RAM2 and RAM3, and therefore the description is omitted. S212 to S2
The flow up to step S50 or S251 is the same as the second read comparison at the time point after the previous cassette loading operation, except that it is determined whether the read error counter is 2, so the description thereof is omitted.

In S250, the reading of the cassette memory 109 succeeds at the time point after the completion of the loading operation, and the reading failure is only once at the time point after the previous cassette loading operation, so the reading error counter is returned to 1. S213
Move to. Since S213 is a routine executed when the read error counter is 1, it means that the reading of the cassette memory 109 has failed at the time after the previous cassette loading operation or the time after the completion of the loading operation. Become.

The mechanical control microcomputer 101 further includes
The capstan motor 108 is a mechanical operation that causes a change in the contact state between the memory input / output terminal 110 and the detection contact 111.
Is driven to move the magnetic tape 103 by a predetermined amount. After the tape transfer operation is completed, the process proceeds to S215. S2
Since the flow from 15 to S216 or S251 is the same as the double reading and comparing flow, the description thereof is omitted.

At step S216, after the tape transfer operation is completed, the reading of the cassette memory 109 is successful, and the reading fails once at either the time after the previous cassette loading operation or the time after the completion of the loading operation. Only because
The read error counter is reset to 1, and the process proceeds to S217. In S214, the reading of the cassette memory 109 is successful even after the loading operation is completed, so that the reading error counter is reset to 0, and the process proceeds to S217.

In step S217, the cassette memory 10 is read twice.
9 is a routine for comparing RAMs that have been successfully read.
If the comparison results match, the cassette memory 109
It is determined that the contents have been correctly read without any error in the contents, and the process proceeds to S230. If they do not match,
Either one of the two successful readings has been successfully read, but there is a possibility that an error has occurred, so the process proceeds to S218.

S218 is a routine for determining whether or not all the mechanical operations set as the mechanical operations that cause a change in the contact state between the memory input / output terminal 110 and the detection contact 111 have been performed. In this embodiment, since the cassette loading operation, the loading operation and the tape transfer operation are set, it is determined whether or not the tape transfer operation has been performed. If the tape transfer operation has been performed, the process proceeds to S251. If the tape transfer operation has not been performed yet, S21
Move to 9. The flow from S219 to S220 or S251 is 2 after the completion of the previous tape transfer operation.
Since it is the same as the read-aloud comparison flow, its explanation is omitted.

Steps S220 and S221 are routines for comparing the RAMs in which the contents of the cassette memory 109 have been successfully read three times in advance. If there is a RAM in which the comparison results match, an error occurs in the contents of the cassette memory 109. S230 and S23
Move to 1. S230 and S231 are routines for setting the RAM, which has been read correctly without causing an error in the contents of the cassette memory 109, as the RAM to be referred to in various subsequent operations.

In step S251, although the mechanical operation set as the mechanical operation that causes a change in the contact state between the memory input / output terminal 110 and the detection contact 111 is executed, 2
This routine is executed again when the contents of the cassette memory 109 have failed to be read and when the contents have been successfully read but have been read with an error. The mechanical control microcomputer 101 drives the loading motor 106 to execute the unloading operation, and the magnetic tape 103 is unwound around the rotating drum 105,
It is wound again on the supply side and winding side reels 103a and 103b and stored in the tape cassette 102. After the tape unloading operation is completed, the mechanical control microcomputer 101 executes the tape cassette ejecting operation in S252. Subsequently, the flow shifts to S253, where a message urging cleaning and inspection of the cassette memory input / output terminal 110 is displayed on a display device (not shown).

As described above, the cassette memory 1
A cassette loading operation, a loading operation, and a tape transfer operation are set as mechanical operations that cause a change in the contact state between the input / output terminal 110 of 09 and the detection contact 111. Then, after executing the set mechanical operations, the contents of the cassette memory 109 are read into the memory device on the apparatus side, and the contents of the read cassette memories 109 are compared to correct the data.
Use a configuration that allows misjudgment. As a result, the degree of deviation within the mechanical error range when the tape cassette is loaded, the uneven wear of the memory input / output terminal 110 or the detection contact 111 due to long-term use of the device and the tape cassette 102, and the memory input / output terminal 110 and / or detection There is an effect that the cassette memory can be read without causing an error in the contents of the cassette memory 109 caused by the contact failure between the memory input / output terminal 110 and the detection contact 111 due to the adhesion of dust to the contact 111.

[0028]

As described above, according to the present invention, in addition to the tape cassette loading operation, the tape loading operation and the tape running operation are performed as the mechanical operations that change the contact state between the memory input / output terminal of the cassette memory and the detection contact. Combination settings are made in advance, and after each set mechanical operation is executed, the memory contents of the cassette memory are read into the memory device on the device side, and the contents of the cassette memory read multiple times into the memory device on the device side are compared to determine correctness can do. Memory due to deviation within the mechanical error range when loading the tape cassette, uneven wear of the memory I / O terminal or detection contact due to long-term use of the device and tape cassette, and adhesion of dust to the memory I / O terminal or detection contact There is an advantage that the cassette memory can be read without the risk of the error of the contents of the cassette memory caused by the poor contact between the input / output terminal and the detection contact.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration example in an embodiment of a recording or reproducing apparatus of the present invention.

FIG. 2 is a flow chart for explaining the operation of the apparatus according to the embodiment of the present invention.

[Explanation of symbols]

101 Mechanical control microcomputer 102 tape cassette 103 magnetic tape 104a, 104b tape guide 106 loading motor 107 Rotary drum motor 108 Capstan motor 109 cassette memory 110 memory input / output terminal 111 detection contact 112 Memory control microcomputer

Claims (2)

(57) [Claims] 1. A tape loading means for acting on a tape wound around a reel of a tape cassette having a memory device to form a predetermined tape path so as to be wound around a rotary drum, and the tape path. A recording or reproducing device comprising a tape running means for running along the tape and a mechanical drive control means for driving and controlling at least the tape loading means and the tape running means, which is adapted to come into contact with a memory input / output terminal of the memory device. a memory output terminal abutment means to a memory access control means for reading the memory contents by accessing the memory device, respectively before and after operation by the mechanical driving control means, before
A recording or reproducing apparatus comprising: a memory content comparison / judgment means for comparing the memory contents read by the memory access control means to judge whether the memory contents are correct. 2. The memory access control means includes a time when the memory input / output terminal contact means contacts the memory input / output terminal of the memory device when the tape cassette is loaded, and at least the mechanical drive control means. When a preset operation including driving of the tape loading means and the tape running means is executed, it operates to access the memory device of the tape cassette, and the memory content comparison / determination means controls the memory access control. 2. The recording or reproducing apparatus according to claim 1, wherein the means makes a comparison by using the memory contents obtained when the memory device accesses the memory device a plurality of times, and judges whether the memory device is correct or not based on the comparison result.