JP3009271B2 - Magnetic recording / reproducing apparatus and magnetic tape cassette used therein - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetic recording / reproducing device and
Ri it relates to a magnetic tape cassette used in Bikore, particularly suitable for performing both tape end detection and user information detected
About the structure.

[0002]

2. Description of the Related Art Generally, in a cassette type magnetic recording / reproducing apparatus, user information relating to recorded contents is recorded by a user in a user information detecting hole provided in a cassette in advance. Is adopted. As an example, in the case of an 8 mm cassette, a detection hole for preventing erroneous erasure is provided at the rear of the cassette case as standard, and it is possible to erase the recorded contents by sliding a lid which opens and closes the detection hole by the user himself. Alternatively, the apparatus is configured to determine whether or not it is possible. A sensor for determining the open / closed state of the detection hole is disposed directly below the detection hole on the device side,
The user information is determined based on the detection information of the sensor. Further, similar user information detection holes are set in other VHS and DAT cassettes. In contrast, a commercial tape cassette usually has a plurality of user information detection holes. With these detection holes, erroneous erasure determination of the main information, erroneous erasure determination of the sub information, and determination of the recording level are performed.

[0003]

With the recent increase in the tape winding area due to the downsizing of the cassette and the prolonged recording time, it has become impossible to set many user information detection holes in the cassette. As a cassette structure that solves the above problem, a method of detecting user information using an existing hole provided in the cassette can be considered. For example, by providing a function of detecting user information in a detection hole provided at a substantially center of the cassette, into which a light emitting portion of detection light for tape end detection is inserted, a new dedicated detection hole is provided. There is no need to provide the cassette, and the cassette can be reduced in size and the structure can be simplified. In this case, the light emitting unit for detecting the tape end and the detection sensor for detecting the user information need to be provided very close to each other on the side of the apparatus on which the cassette is mounted. There is a problem such as worsening. SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording / reproducing apparatus having a simple structure and a detecting mechanism capable of detecting a tape end and user information with high accuracy.

[0004]

In order to achieve the above object, the present invention provides a light emitting unit and a light receiving unit, which are optically taped.
In the magnetic recording / reproducing apparatus for detecting a pre-end, the magnetic tape cassette has a user information detecting function in a hole for accommodating a part of the light emitting section when the magnetic tape cassette is mounted on the apparatus. A detecting member pivotally supported so as to be able to slide up and down substantially coaxially with the light emitting portion, an urging means for urging the detecting member upward, and an arm portion which can be slid up and down integrally with the detecting member And a detection sensor for detecting an on or off state based on the position of the arm when the arm is positioned above or below. Here, the detection member may have a cylindrical shape capable of sliding up and down on the outer periphery of the light emitting unit or a pin shape capable of sliding up and down substantially coaxially with the light emitting unit.

[0005]

By configuring the tape end detection and the user information detection mechanism of the magnetic recording / reproducing apparatus as described above, regarding the tape end detection, the light receiving section detects the detection light emitted from the light emitting section. According to the user information detection hole state of the tape cassette, the user information detection member, which is disposed substantially coaxially with the light emitting portion and slidable up and down, is positioned above or below while adopting the dynamic detection method. As a result, the detection sensor is turned on or off by a part of the arm portion which moves up and down integrally with the detection member, and
The information can be detected. Here, by making the detection member a cylindrical shape or a pin shape, the mechanism configuration can be simplified, the radial bearing length of the slide portion can be increased, and the vertical slide operation can be stabilized. Reliability can be improved.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a magnetic tape cassette mounted on a magnetic recording / reproducing apparatus of the present invention. In FIG. 1, reference numeral 1 denotes a front lid for protecting a magnetic tape stretched in front of an opening 3 of the tape cassette 2 from outside air, tentacles, etc., and pivots on the side wall of the tape cassette half 4. It is freely supported. Reference numeral 5 denotes a front lid locking member for holding the front lid 1 in a closed state as shown in the drawing, and is disposed in the concave portion 4a of the side wall of the cassette half 4, and is sandwiched by the side wall 1a of the front lid 1. Is held in. Reference numeral 6 denotes a tape end detection window provided on the side wall 4b of the cassette half 4 for detecting the start and end of the tape, and is provided at two places on the tape supply side and the winding side of the cassette half 4. It is empty. Reference numeral 7 denotes a detection hole into which a light emitting element for tape end detection is inserted. The detection hole 7 is provided with a user information detection function for leaving the recorded information of the user as described later, and it is not necessary to newly provide a dedicated user information detection hole.
The size of the cassette is reduced.

FIG. 2 is a plan view showing components in a simplified manner for easy understanding of the principle of tape end detection employed in the magnetic tape cassette of the present invention shown in FIG. FIG. 3 shows a cross section AA of FIG.
Parts corresponding to those in FIG. 1 are denoted by the same reference numerals. First, a schematic configuration will be described with reference to FIGS. Cassette 2
Is set at a predetermined position on the substrate 8 of the apparatus.
Reference numeral 9 denotes a light emitting element which is inserted into the detection hole 7 of the cassette 2 when the cassette 2 is mounted on the apparatus, and is fixed on the substrate 8 of the apparatus. Numeral 10 denotes a light receiving element arranged on the side wall 4b of the cassette half 4, and is arranged on the substrate such that the light receiving section 10a comes to the position of the tape end detection window 6 of the cassette 2. Next, the detection principle will be described. 2 and 3, light is emitted from the light emitting section 9a of the light emitting element 9.
The light passes through a slit 7a provided in the detection hole 7 in advance, and reaches the tape end detection window 6 through the optical path indicated by the arrow shown in the drawing. At this time, the tape 11 stretched inside the cassette 2 is located between the light receiving element 10 and the light emitting element 9 and blocks the optical path. Here, when the tape 11 started to wind or ended to wind, a transparent leader tape provided at the tape end reached between the light emitting element 9 and the light receiving element and was blocked. Light without obstacles
Through the open end detection window 6 and received by the light receiving element 10;
The beginning or end of the tape is detected.

FIG. 4 shows a magnetic tape cassette 2 shown in FIG.
FIG. 6 is a perspective view showing an example of a user information detecting unit structure provided above the detecting hole 7 of FIG. In the figure, reference numeral 12 denotes a user information detection hole provided on the upper surface 4c of the cassette half 4 with respect to the detection hole 7. Reference numeral 13 denotes a slide guide portion 13a which is disposed from the inside of the cassette 2 so as to face the user information detection hole 12 and which is bent in an L-shape and is provided on the lower case of the cassette half 4 on the lower surface of the cassette 2. On the other hand, the user information detecting hole 12 is sandwiched between a vertically standing guide wall 4d and a wall 4e of the cassette half 4, and can be closed or opened by sliding in the direction of the arrow in the drawing. Yes, for example, information on the user side such as prohibition of erroneous erasure and a difference in recording level can be made to be determined by the apparatus side by opening and closing the user information detection hole 12, so that good recording and reproduction can be performed. is there.

Next, the user information detecting mechanism of the magnetic recording / reproducing apparatus of the present invention will be described in detail with reference to FIGS.
FIG. 5 is a perspective view showing the configuration of one embodiment of the user information detecting mechanism. In the figure, reference numeral 14 denotes a slide member capable of sliding up and down on the outer periphery 9b of the light emitting element 9, and the slide member 14 is opposed to the outer periphery by approximately 180 degrees for a total of 4
And a plurality of through-holes 14a, an arm part 14b radially protruding from a part of the outer periphery, and at least one vertical slide groove 14c as shown in the part of the outer periphery. 7, so that it can be inserted into the tapered shape. Reference numeral 15 denotes an urging spring for urging the slide member 14 upward. Here, the slide member 1
4 is a locking portion 14 provided at the tip of the slide groove 14c.
The upper position is regulated by engaging the projection 9c provided on the outer periphery 9b of the light emitting section 9 with the d, and the light emitting section 9 is held at a predetermined position.

FIGS. 6 and 7 are sectional views showing the operation of the user information detecting mechanism. FIG. 6 shows a user information detection hole 12.
Is closed by the slide lid 13 and the slide member 14
Indicates a state where it is located downward. Where 16
Is a user information detection sensor fixed on the mechanical board 8, and the above-mentioned alarm is provided when the slide member 14 is located below.
The memory section 14b pushes down the terminal 16a of the user information detecting sensor 16 to detect the ON state of the sensor. At this time, the detection light emitted from the light emitting section 9a of the light emitting element 9 passes through the through hole 14a and the slit 7a located above the slide member 14 as shown by the arrow, and is guided to the light receiving element 10.

FIG. 7 shows a state in which the user information detection hole 12 is open and the slide member 14 is located upward. Here, the engagement between the arm portion 14b of the slide member 14 and the terminal 16a is released, and the user information detection sensor 16 detects the off state. At this time, the detection light emitted from the light emitting section 9a of the light emitting element 9 passes through the through hole 14a and the slit 7a located below the slide member 14 as shown by the arrow, and is guided to the light receiving element 10. Since the user information detection mechanism of the present invention operates as described above, the user information can be reliably detected without hindering the tape end detection.

FIG. 8 is a perspective view showing the configuration of another embodiment of the user information detecting mechanism of the magnetic recording / reproducing apparatus of the present invention. In the figure, reference numeral 17 denotes a light emitting element having a through hole 17a in the center, and has a light emitting portion 17b above. The attachment to the mechanical substrate 8 is performed in the same manner as the light emitting element 9. Reference numeral 18 denotes an E-ring for fixing the arm portion 19 at a predetermined position of the detection pin 20, and a groove 20 of the detection pin 20.
fixed to a. Reference numeral 21 denotes an urging spring that presses a disk portion 20b provided at a lower end of the detection pin 20 to urge the detection pin 20 upward. Further, the light emitting element 17 is provided with a regulating groove 17c which regulates the rotation of the arm portion 19 in a state where the arm portion 19 is incorporated and enables only vertical sliding integrally with the detection pin 20. ing.

FIG. 9 shows a state in which the user information detection hole 12 is closed by the slide lid 13 and the detection pin 20 is positioned downward. As shown in FIG. 6, a user information detecting sensor 16 is fixed at a predetermined position on the mechanical substrate 8, and when the detecting pin 20 is located at a lower position, the arm 19 detects the user information. The terminal 16a of the sensor 16 is pushed down, and the sensor detects the ON state. In the present embodiment, the detection light emitted from the light emitting section 17b of the light emitting element 17 has nothing to block, so it passes through the slit 7a of the cassette 2 as shown by the arrow and is guided to the light receiving element 10.

FIG. 10 shows a state in which the user information detection hole 12 is open and the detection pin 20 is positioned upward. At this time, the arm 1 attached to the detection pin 20
9 and the terminal 16a are disengaged, and the user information detection sensor 1
6 detects the off state. Also in this case, similarly to FIG. 9, the detection light emitted from the light emitting element 17 passes through the slit 7a of the cassette 2 as shown by the arrow, and is guided to the light receiving element 10.

As described above, according to this embodiment, the open / close state of the user information detection hole 12 provided in the tape end detection hole 7 is detected without hindering the tape end detection function. As a result, the recording information on the user side can be transmitted to the apparatus, and good recording and reproduction can be performed. Furthermore, in the first embodiment, the light emitting element 9 having a shape almost similar to the conventional shape can be used, the structure can be simplified, and the cost can be reduced and the reliability can be increased.

[0016]

As is clear from the above description,
Magnetic recording / reproducing apparatus of the present invention and magnetic tape used therein
According to the cassette , when a tape cassette having a user information detection function is mounted in the tape end detection hole, the tape end detection and the user information detection can be reliably performed with a simple configuration, and the device is reduced by the space saving of the detection mechanism. Can be reduced in size.

[Brief description of the drawings]

FIG. 1 shows a magnetic tape mounted on a magnetic recording / reproducing apparatus of the present invention.
FIG. 3 is a perspective view showing an embodiment of the cassette.

FIG. 2 is a plan view showing the principle of tape end detection.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a perspective view showing an example of a user information detection structure provided in a detection hole of the magnetic tape cassette shown in FIG.

FIG. 5 is a perspective view showing a configuration of an embodiment of a user information detection mechanism.

FIG. 6 is a cross-sectional view showing the operation of a user information detection mechanism. (ON state)

FIG. 7 is a cross-sectional view showing the operation of the user information detection mechanism. (Off state)

FIG. 8 is a perspective view showing the configuration of another embodiment of the user information detecting mechanism.

FIG. 9 is a cross-sectional view showing an operation of a user information detecting mechanism in another embodiment. (ON state)

FIG. 10 is a cross-sectional view showing an operation of a user information detecting mechanism in another embodiment. (Off state)

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Front cover 1a ... Side wall 2 ... Tape cassette 3 ... Opening 4 ... Cassette half 4a ... Recess 4b ... Side wall 5 ... Front cover locking member 6 ... Tape end detection window 6a ... Tape end detection hole 7 ... Detecting hole 8 ... Substrate 9 ... Light emitting element 10 ... Light receiving element 11 ... Magnetic tape 12 ... User information detecting hole 13 ... Slide lid 14 ... Slide member 14a ... Through hole 14b ... Arm part 15 ... Biasing spring DESCRIPTION OF SYMBOLS 16 ... User information detection sensor 16a ... Terminal 17 ... Light emitting element 18 ... E-ring 19 ... Arm part 20 ... Detection pin 20a ... Groove part 20b ... Disk part 21 ... Urging spring

Continued on the front page (72) Inventor Satoshi Yamashita 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Pref. Hitachi Media Manufacturing Co., Ltd. Hitachi Maxell, Inc. (72) Inventor Mikihisa Inoue 1-1-88 Ushitora, Ibaraki-shi, Osaka Hitachi Maxell, Inc. (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 15/08 G11B 15/07

Claims (5)

(57) [Claims] (1)It has a light emitting element and a light receiving element,
When installing the tape cassette, install it on the magnetic tape cassette.
Insert the light emitting element into the detection hole and detect the tape end
And the user stored in the magnetic tape cassette.
User information detecting means for detecting user informationMagnetic record
In a recording and playback device,The user information detecting means, The light emitting element It is supported so that it can slide up and down on substantially the same axis.
ReTo detect the user informationA detecting member, an urging means for urging the detecting member upward, and an arm slidable up and down integrally with the detecting member.
And the arm portion is located above or below.,Previous
Detects ON or OFF state according to the position of the arm
A magnetic recording and reproducing apparatus, comprising: a detection sensor; 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the detection member has a cylindrical shape that can slide up and down on an outer periphery of the light emitting element . 3. The magnetic recording / reproducing apparatus according to claim 1, wherein the detection member has a pin shape that can slide up and down substantially coaxially with the light emitting element . 4. The method according to claim 1, wherein
Attached to a magnetic recording / reproducing device
It is stored in a cassette half, and the tape
Tape cassette with detection holes for detecting
In the vicinity of the detection holes, memory for storing user information
A magnetic tape cassette provided with means. 5. The user information storage means according to claim 4, wherein said user information storage means includes a cassette above said detection hole.
User information detection hole provided on the upper surface of the
A magnetic member constituted by a slide member which can be opened and closed.
Ki tape cassette.