JPH10172211A - Recording and reproducing apparatus for video tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing apparatus for a video tape capable of reading out index information of at least two kinds of video cassettes, one of which is a small cassette and the other of which is a large cassette, by using a compact configuration. SOLUTION: When a large video cassette 6 is loaded, a substrate attaching section 61, at which an antenna substrate 63 is provided, is caused to engage with a lower surface of the large video cassette 6 to be accommodated into a rotating block 62. Thereafter, the rotating block 62 is returned to rotate against an elastic force of a returning spring 65, so that the antenna substrate 63 is caused to be moved back. Then, communication is performed between an antenna substrate 45 and an antenna of a cassette tag 8. On the other hand, when a small video cassette 7 is loaded, the rotating block 62 retains its position, and communication is performed between a cassette tag of the small video cassette 7 and the antenna substrate 63.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
More particularly, the present invention relates to a video tape recording / reproducing apparatus for recording / reproducing a video tape of a video cassette to which a cassette tag containing an IC chip for transmitting / receiving data in a non-contact manner is attached.

[0002]

2. Description of the Related Art There is a demand for recording and storing video data which is photographed by an image pickup device such as a television camera and recorded on a video tape in such a manner that information such as its contents can be easily confirmed. . Especially,
In the case of a television broadcast station used for news gathering, a necessary cut is quickly selected from a large number of cuts (consecutively shot images or video data) shot by a video camcorder or the like. Need to be edited.

Until now, usually, such information of recorded video data is recorded in a separate memo at the time of shooting, and at the time of reproduction or editing, desired video data is selected at a high speed while viewing the memo. Such a method is used. In recent years, in a 1/4 inch digital video cassette tape or the like, a semiconductor memory element such as a flash memory is incorporated in a cassette for accommodating a video tape so that information such as recording time, recording content, and title can be recorded. There are also things.

However, recording and reproduction of data with respect to the semiconductor memory device incorporated in such a video cassette tape is provided, for example, near the erroneous erasure prevention claw on the back of the cassette case, and ground, power, clock, It is performed by a contact method through four electrodes of data, and therefore, there are some disadvantages. First, an electrode of a device for recording and reproducing data must be brought into proper contact with the electrode, and if the positioning is not performed accurately, data cannot be recorded / reproduced properly. Was. In addition, there has been a problem that a contact failure is caused by the adhesion of dust or the like, and data cannot be recorded / reproduced properly. In any case, the contact that transfers the data is a contact method,
There is a problem in that there is a limit to repeated use, that is, it is weak and the reliability is not sufficient.

[0005] For a material to be newly recorded from now on, the use of such a video cassette tape makes it easy to confirm the contents and the like. In television broadcasting stations, etc., it cannot be applied to a huge amount of video cassette tapes such as hundreds of thousands,
Such information cannot be stored in an electronic state.

To solve such a problem, index information is stored in an IC memory for transmitting and receiving data in a non-contact manner via an antenna, and the antenna and the IC
It is conceivable that a cassette tag including a memory is attached to the back of the video cassette. With this configuration, for example, the index information of the video cassette can be accurately read from the IC memory via the antenna using a portable reading device, and the content can be easily confirmed. Usually, the readable distance of such a reading device is about 0 to 20 mm.

An IC included in such a cassette tag
The index information stored in the memory is read by an antenna built in the video tape recording / reproducing apparatus when the video cassette is set in the video tape recording / reproducing apparatus.

[0008]

By the way, the dimensions of the video cassette are large (L) and small (S).
There are various types, and it is necessary to arrange an antenna in the video tape recording / reproducing apparatus so that the index information of these two types of video cassettes can be read. Further, in order to enhance portability, the video tape recording / reproducing apparatus needs to be compact with low power consumption. However, conventionally, there is no video tape recording / reproducing apparatus capable of reading the index information of such two types of video cassettes.

An object of the present invention is to provide a video tape recording / reproducing apparatus capable of reading index information of at least two types of video cassettes, large and small, with low power consumption and a compact configuration. .

[0010]

In order to achieve the above object, a video tape recording / reproducing apparatus according to the present invention comprises a cassette tag including an antenna and an IC chip electrically connected to the antenna. A video tape recording / reproducing apparatus for recording / reproducing a video tape accommodated in a video cassette loaded with a video cassette, comprising: transport means for transporting the video cassette between a cassette insertion slot and a reel mounting position; When the video cassette is set at the reel mounting position, the first video cassette is urged in one direction by an elastic member and a first antenna facing an antenna included in a cassette tag of the first video cassette, When a second video cassette smaller in size than one video cassette is set in the reel mounting position, the second video cassette A second antenna to antenna and opposed, which is included in the set tag, the first in the process of the first video cassette is transported to the reel mounting position
Antenna supporting means which engages with the video cassette and retracts in a predetermined direction against the elastic force of the elastic member.

Further, in the video tape recording / reproducing apparatus of the present invention, preferably, the antenna supporting means includes a rotating portion urged by an elastic member so as to be rotatable around a predetermined rotating shaft, Antenna is fixed, is urged in a direction to protrude from the rotating portion, and the first video cassette is transported to the reel mounting position.
And an antenna supporting portion that moves in a direction overlapping with the rotating portion by engaging with the video cassette.

In the video tape recording / reproducing apparatus according to the present invention, when the first video cassette is inserted and transported to the reel mounting position, the antenna support means engages with the first video cassette and retreats. Therefore, there is no need to specially supply power for retracting the antenna support means. Further, in the video tape recording / reproducing apparatus of the present invention, the antenna support section overlaps the rotating section at the time of evacuation, so that the size of the antenna support means at the time of evacuation can be reduced, and the apparatus can be made more compact.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is a partial side view of a video tape recording / reproducing apparatus corresponding to two kinds of cassette sizes, large (L) and small (S), and FIG. It is a front view of the threading mechanism of the video tape recording / reproducing apparatus shown, and the periphery of an antenna board. FIG. 3 is a diagram for explaining a cassette tag attached to the back of the video cassette. As shown in FIG. 3, the rear surface 7a of the small video cassette 7
Has a cassette tag 1 attached thereto. Cassette tag 1
Has a memory IC storing index information at one end.
1a, and a winding antenna 1b electrically connected to the memory IC 1a is included in the center.

This video tape recording / reproducing apparatus must satisfy at least the following conditions in order to record / reproduce video tapes of two cassette sizes, large and small. In other words, video tape recording
In the reproducing apparatus, as shown in FIGS. 1 and 2, when the small video cassette 7 is inserted, the reel base 9 is located at a position corresponding to the reel of the small video cassette 7. In the video tape recording / reproducing device, the antenna substrate 3 is located at a position facing the antenna of the cassette tag 1 attached to the back of the small video cassette 7 at the mounting position.

In a video tape recording / reproducing apparatus,
As shown in FIGS. 1 and 2, the large video cassette 6
Is inserted, the reel base 10 is located at a position corresponding to the reel of the large video cassette 4. In the video tape recording / reproducing apparatus, the cassette tag 8 attached to the back of the large video cassette 6 at the mounting position.
The antenna substrate 4 is located at a position facing the antenna. The cassette tag 8 has the same shape and configuration as the cassette tag 1.

In the video tape recording / reproducing apparatus, when the reels of the large video cassette 6 or the small video cassette 7 are mounted on the reel base 10 or the reel base 9,
As shown in FIG. 2, the tape is threaded on the drum.

By the way, from the viewpoint of communication efficiency, it is desirable that the antenna substrates 3 and 4 are arranged to face the cassette tag 1 and the cassette tag 2, respectively. However, when the large video cassette 6 is mounted on the reel base 10, the antenna substrate 3 is located on a path for carrying the large video cassette 6 to the mounting position.
It is necessary to escape the antenna substrate 3 somewhere so as not to be in the way.

If a motor or a plunger is used to release the antenna substrate 3 as described above, the mechanism becomes complicated, and problems arise in terms of power consumption, weight, price and internal space. Further, in a device using a battery such as a camcorder or a portable device, power saving is required, and such a configuration is not preferable. By the way, it is conceivable to use one antenna substrate and move the antenna substrate corresponding to the cassettes of each size. However, in this case, the mechanism becomes complicated as in the case where the escape mechanism for the antenna is provided, and the power consumption is increased. Problems arise in terms of weight, price and internal space. In addition, new problems such as the positioning accuracy of the antenna substrate arise.

Second Embodiment FIG. 4 is a partial side view of a video tape recording / reproducing apparatus according to the second embodiment . As shown in FIG. 4, in this video tape recording / reproducing apparatus, the base plate 11
An antenna substrate 34 is provided via the ferrite plate 12. The ferrite plate 12 has a function of reducing the influence of an induced current generated in the base plate 11 and a metal component in the vicinity thereof. In this video tape recording / reproducing apparatus, when the reel of the small video cassette 7 is mounted on the reel base 9, the vicinity of the right end of the antenna substrate 34 in the figure is located below the cassette tag 1 in the figure, and the cassette tag 1 Communication is performed between the antenna contained in the antenna board and the antenna substrate 34.

In this video tape recording / reproducing apparatus, when the reel of the large video cassette 6 is mounted on the reel base 10, the vicinity of the left end of the antenna substrate 34 in the figure is located below the cassette tag 8 in the figure. And cassette tag 8
Communication is performed between the antenna contained in the antenna board and the antenna substrate 34.

As described above, according to the video tape recording / reproducing apparatus shown in FIG. 4, a single antenna board 34 can communicate with each antenna included in the cassette tags 1 and 8. However, in the video tape recording / reproducing apparatus shown in FIG.
4 needs to be longer than the distance between the cassette tag 8 and the cassette tag 1 when the large video cassette 6 and the small video cassette 7 are inserted, which poses a space problem. Further, it is necessary to newly provide a ferrite plate 12 for suppressing the generation of the induced current. Furthermore, cassette tag 1,
Since the antenna 8 and the antenna substrate 34 are positioned orthogonally to each other, there is a problem that the reception efficiency of the magnetic flux between the antennas is low, and the power required for reading and writing information from and to the memory IC increases.

In order to solve this problem, it is conceivable to arrange an antenna only at the position of the cassette tag 8 and increase the magnetic flux intensity emitted from this antenna so that it can be used for communication with the cassette tag 1. It is practically difficult from the viewpoint of the influence on peripheral devices and the Radio Law.

Third Embodiment FIG. 5 shows a video tape recording / reproducing apparatus 41 of this embodiment .
FIG. As shown in FIG. 5, the video tape recording / reproducing apparatus 41 is provided with a compartment 24 in which a video cassette inserted from a cassette insertion slot 70 is mounted and transported. L-shaped holes 28a, 28b are formed in the cascon side plate 28, and these holes 28a, 28b
Has a protrusion 24 provided in the compartment 24.
a, 24b are fitted. Projections 24a, 24b
The hole 2 is driven by, for example, power from a motor (not shown).
It moves along 8a and 28b.

At the cassette down position, an antenna board 44 fixed to the board mounting portion 21 and an antenna board 45 are provided. Here, the antenna substrate 45
When the large video cassette 6 is transported to the down position, it is placed at a position facing the antenna of the cassette tag 8 attached to the back of the large video cassette 6. The substrate mounting portion 21 is rotatably supported by a rotating shaft 13 a, and the rotating shaft 13 a is fixed to the base plate 11 via the bearing plate 13. The board mounting portion 21 is urged by a return spring 15 in the direction of the arrow in FIG. The board mounting portion 21 is in a vertical posture as shown in FIG. 5 when no external force is applied. In addition,
The urging force of the return spring 15 applies a smaller rotational moment to the substrate mounting portion 21 than a rotational moment generated in the substrate mounting portion 21 when the weight of the large video cassette 6 is applied to the tip of the substrate mounting portion 21. Is determined as follows. On the upper surface of the base plate 11, a cassette receiver 25 for supporting the video cassette is provided.

Next, the operation of mounting the small video cassette 7 at the down position in the video tape recording / reproducing apparatus 41 shown in FIG. 5 will be described. FIG. 6 shows FIG.
21 is a side view showing a state in which the small video cassette 7 is mounted at the down position in the video tape recording / reproducing apparatus 41 shown in FIG. Video tape recording / playback device 41
And the small video cassette 7
Is inserted into the compartment 24, and the small video cassette 7 is carried into the down position along the holes 28a and 28b. At this time, the small video cassette 7 does not hit the antenna substrate 44, and the reels of the small video cassette 7 are set on the reel base.
The cassette tag 1 stuck on the back of the small video cassette 7 and the antenna substrate 44 are located to face each other. Then, communication is performed between the antenna included in the cassette tag 1 and the antenna on the antenna substrate 44, and reading and writing of index information is performed between the IC memory included in the cassette tag 1 and the data processing unit on the apparatus side. Done.

Next, the operation of mounting the large video cassette 6 at the down position in the video tape recording / reproducing apparatus 41 shown in FIG. 5 will be described. FIG. 7 is a side view showing a state in which the large video cassette 6 is mounted at the down position in the video tape recording / reproducing apparatus 41 shown in FIG. When the large video cassette 6 is inserted into the video tape recording / reproducing device 41 from the cassette insertion slot 70, the large video cassette 6 is
4 and carried into the down position along the holes 28a and 28b. At this time, the lower surface of the large video cassette 6 contacts the antenna substrate 44, and the large video cassette 6
Until the return spring 15 is placed on the cassette receiver 25.
7, the board mounting portion 21 rotates rightward in FIG. 7 around the rotation shaft 13a, and retracts the antenna board 44.

As a result, the large video cassette 6 is placed in the down position, and the antenna of the cassette tag 8 and the antenna substrate 4 attached to the back of the large video cassette 6
5 are opposed to each other. Then, communication is performed between the antenna included in the cassette tag 8 and the antenna on the antenna substrate 45, and reading and writing of index information is performed between the IC memory included in the cassette tag 8 and the data processing unit on the apparatus side. Done.

As described above, video tape recording and
According to the reproducing device 41, the substrate mounting portion 21 is retracted by the gravity of the large video cassette 6, and there is no need to apply special power for retracting the large video cassette 6.

In the process of inserting the large video cassette 6, the reel base of the small video cassette 7 is retracted by a predetermined power. In the process of inserting the small video cassette 7, the reel base of the large video cassette 6 is retracted by a predetermined power.

According to the above-described video tape recording / reproducing apparatus 41, since the substrate mounting portion 21 is released below the large video cassette 6 placed at the down position, the large tape placed at the down position is removed. It is necessary to provide a hole or the like below the video cassette 6 to secure a space where the board mounting portion 21 escapes. Therefore, it may be difficult to secure such a space in relation to the downsizing of the device.

Fourth Embodiment The video tape recording / reproducing apparatus of the present embodiment solves the above-mentioned problem of the space for the board mounting portion in the video tape recording / reproducing apparatus 41 of the third embodiment to escape. is there.

FIG. 8 is a partial side view of the video tape recording / reproducing apparatus 51 at the initial stage of the cassette down operation of the large video cassette 6. As shown in FIG. 8, the video tape recording / reproducing device 51 has a cassette insertion port 7.
A compartment 24 is provided for loading and transporting a video cassette inserted from zero. L-shaped holes 28a and 28b are formed in the cascon side plate 28.
Projections 24a, 24b provided in the compartment 24 are fitted into 8a, 28b. Projection 24
A and 24b move along the holes 28a and 28b by, for example, power from a motor (not shown).

At the cassette down position, an antenna board 63 fixed to the board mounting portion 61 and an antenna board 45 are provided. Here, the antenna substrate 45
When the large video cassette 6 is transported to the down position, it is placed at a position facing the antenna of the cassette tag 8 attached to the back of the large video cassette 6. On the upper surface of the base plate 11, a cassette receiver 25 for supporting the video cassette is provided.

Hereinafter, the structure around the antenna substrate 63 will be described in detail. 9A is a front view around the antenna substrate 63, FIG. 9B is a side view around the antenna substrate 63 viewed from the direction of arrow B shown in FIG. 9A, and FIG. The antenna substrate 6 viewed from the direction of the arrow C shown in FIG.
It is a side view of 3 periphery. The antenna board 63 is a plate nut 7
2, and the plate nut 72 is fixed to the board mounting portion 61 via a fixing screw 73. The support shaft 61a of the substrate mounting portion 61 is mounted in a groove of the rotary block 62, and is urged upward in FIG. 9B by a compression spring 75.

The rotary block 62 is rotatably mounted on a support shaft 68 of a bearing plate 64 and is urged by a return spring 65 in the direction of the arrow in FIG. 9C. When no external force is applied to the rotation block 62, the return spring 6
5 is pressed against the stopper 71. In addition, the bearing plate 64 is fixed to the base plate 11 via a set screw 74. Here, when the board mounting portion 61 is moving against the elastic force of the compression spring 75, the elastic force of the possible compression spring 75 is smaller than the elastic force of the return spring 65 so that the rotating block 62 does not rotate. Is set weak enough.

The biasing force of the return spring 65 causes the rotating block 62 to generate a smaller rotating moment than the rotating moment generated in the rotating block 62 when the weight of the large video cassette 6 is applied to the tip of the rotating block 62.
Is set to be added to.

Next, the operation of the video tape recording / reproducing apparatus 51 will be described with reference to FIGS. First, when the large video cassette 6 is inserted from the cassette insertion slot 70, the large video cassette 6 is mounted in the compartment 24, and the protrusions 24a, 24b are formed in the holes 28a, 28.
8B, and the lower surface of the large video cassette 6 abuts on the tip of the upright antenna substrate 63 as shown in FIG. Then, as shown in FIG. 10, when the large video cassette 6 moves downward, the lower surface of the large video cassette 6 causes the antenna substrate 63 to move into the rotating block 62 against the elastic force of the compression spring 75 shown in FIG. Pushed. At this time, the rotating block 62 is
And is kept pressed by the stopper 71.

Next, as shown in FIG. 11, when the large video cassette 6 moves further downward, the antenna substrate 6
3 is completely housed in the rotating block 62, the lower end of the large video cassette 6 presses the tip of the rotating block 62, and the rotating block 62 is opposed to the elastic force of the return spring 65, as shown in FIG. Rotate the antenna board 6
Evacuate 3.

When the large video cassette 6 is set at the down position, as shown in FIG. 11, the antenna of the cassette tag 8 attached to the back of the large video cassette 6 and the antenna substrate 45 face each other. Communication is performed between the IC memory 1a and the video tape recording / reproducing device 51.
The reading and writing of the index information is performed with the data processing unit.

In the video tape recording / reproducing apparatus 51, the small video cassette 7
Is inserted, the antenna of the cassette tag 1 attached to the back of the small video cassette 7 and the antenna board 63 face each other, as in the video tape recording / reproducing apparatus 41 shown in FIG. Communication is performed between them, and the IC memory 1a and the video tape recording / reproducing device 51 are communicated.
The reading and writing of the index information is performed with the data processing unit.

According to the video tape recording / reproducing apparatus 51, the board mounting portion 61 is configured to be housed in the rotary block 62, so that the antenna
The size of the periphery can be reduced, and interference between the mechanism around the antenna substrate 63 and the base plate 11 can be effectively avoided. That is, the video tape recording / reproducing device 51
According to this configuration, it is not necessary to provide a hole or the like below the large video cassette 6 placed at the down position, which is particularly suitable for a compact structure in which there is no room in space.

In the process of inserting the large video cassette 6, the reel base of the small video cassette 7 is retracted by a predetermined power. In the process of inserting the small video cassette 7, the reel base of the large video cassette 6 is retracted by a predetermined power.

The video tape recording / reproducing apparatus has both functions of recording and reproducing video tapes.
It may have only one function of recording or reproduction of a video tape.

[0044]

As described above, according to the video tape recording / reproducing apparatus of the present invention, communication between at least two types of video cassettes, namely, a cassette tag and an IC chip of a cassette tag, can be performed simply and with low power consumption. It can be performed with a compact configuration.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a large (L) and a small (S) 2
FIG. 2 is a partial side view of the video tape recording / reproducing apparatus according to the first embodiment of the present invention corresponding to various cassette sizes.

FIG. 2 is a front view of the threading mechanism and the periphery of an antenna substrate of the video tape recording / reproducing apparatus shown in FIG. 1;

FIG. 3 is a diagram for explaining a cassette tag attached to the back of the video cassette.

FIG. 4 is a partial side view of a video tape recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 5 is a partial side view when a video cassette is inserted in a video tape recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 6 is a partial side view when the small video cassette of the video tape recording / reproducing apparatus according to the third embodiment of the present invention is down.

FIG. 7 is a partial side view when the large video cassette of the video tape recording / reproducing apparatus according to the third embodiment of the present invention is down.

FIG. 8 is a partial side view of a video tape recording / reproducing apparatus according to a fourth embodiment of the present invention when a large video cassette is inserted.

FIG. 9A is a front view around an antenna substrate 63,
9B is a side view of the periphery of the antenna substrate 63 viewed from the direction of arrow B shown in FIG. 9A, and FIG. 9C is FIG.
FIG. 5 is a side view of the periphery of the antenna substrate 63 viewed from the direction of arrow C shown in FIG.

FIG. 10 is a partial side view of a process of carrying a large video cassette from an insertion position to a down position in the video tape recording / reproducing apparatus according to the fourth embodiment of the present invention.

FIG. 11 is a partial side view when the large video cassette of the video tape recording / reproducing apparatus according to the fourth embodiment of the present invention is down.

[Explanation of symbols]

11 ... base plate, 24 ... compartment, 24
a, 24b: Projecting portion, 25: Cassette receiver, 28: Cascon side plate, 28a, 28b: Hole, 45: Antenna substrate,
Reference numeral 51 denotes a video tape recording / reproducing apparatus, 61 denotes a board mounting portion, 62 denotes a rotating block, 63 denotes an antenna board, 64 denotes
Bearing plate, 65: return spring, 68: support shaft

Claims (3)

[Claims] 1. A video tape recording / reproducing apparatus for recording / reproducing a video tape accommodated in a video cassette having a cassette tag including an antenna and an IC chip electrically connected to the antenna. Transport means for transporting a video cassette between a cassette insertion slot and a reel mounting position; and a cassette tag of the first video cassette when the first video cassette is set at the reel mounting position. A first antenna opposed to the antenna included in the first video cassette; and a second video cassette which is urged in one direction by an elastic member and has a smaller size than the first video cassette is set at the reel mounting position. A second antenna facing the antenna included in the cassette tag of the second video cassette; A video tape recording / reproducing device having an antenna support means for engaging with the first video cassette in the process of transporting the cassette to the reel mounting position and retracting in a predetermined direction against the elastic force of the elastic member. Playback device. 2. The video tape recording / reproducing apparatus according to claim 1, wherein said antenna supporting means is biased by said elastic member so as to be rotatable about a predetermined rotation axis. 3. The antenna supporting means, wherein a rotating portion urged by an elastic member so as to be rotatable about a predetermined rotation axis and the second antenna are fixed, and project from the rotating portion. And an antenna support portion that is biased in a direction and engages with the first video cassette when the first video cassette is conveyed to the reel mounting position and moves in a direction overlapping with the rotating portion. Item 2. A video tape recording / reproducing apparatus according to Item 1.