JPH06176434A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make the device compact by entering a drum into the inside of a mouth of a cassette. CONSTITUTION:A positioning pin 14 is arranged at a position similar to the conventional positioning pin 14', and the cassette 7 is inserted in the same manner as the conventional practice. Since a light emitting part and a light emitting part window 15 of the positioning pin 14 are entered into the inside of the cassette 7, nothing to interfere with the drum 1 is in existence inside the mouth of the cassette 7, and a compact tape traveling system having a drum 1 entered into the mouth can be formed. In this tape traveling system, the end of a tape is detected in such a manner similar to the conventional practice that when leader parts at the beginning and the end of the tape are respectively passed between the light emitting part window 15 and a photosensor 13, light is transmitted through these leaders and is received by the photosensor 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape end detecting mechanism in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art FIG. 5 is an explanatory diagram showing a schematic configuration of a main part of a conventional magnetic recording / reproducing apparatus when a cassette is inserted, and FIG. 6 is an explanatory diagram showing a schematic configuration of completion of loading shown in FIG. . FIG. 7 is a perspective view showing the positioning pins of the cassette in FIGS. 5 and 6.

In FIG. 5, 1 is a drum, 2 is a capstan motor, 3 is a pinch roller, 4 is a vertical guide roller, 5 is an inclined post, 6 is a magnetic tape, 7 is a cassette,
Reference numeral 8 is a supply side reel, 9 is a take-up side reel, 10 is a sub chassis, 11 is a main chassis, and 12 is a light emitting portion fixed on the sub chassis 10. An optical sensor 13 is fixed to the main chassis 11. Also, FIG.
Reference numeral 14 'denotes a cassette positioning pin for the sub chassis 1
It is fixed at 0 above.

Now, when the cassette 7 is inserted as shown in FIG. 5, the pinch roller 3, the vertical guide roller 4 and the inclined post 5 enter the inside of the tape drawer (mouse) of the cassette 7 so that the cassette 7 is sub-chassis 10. It is fixed by the positioning pin 14 'above. The sub-chassis 10 is moved toward the drum 1 with the cassette 7 placed thereon by a loading switch (not shown). At this time, the pinch roller 3, the vertical guide roller 4, and the inclined post 5 are also moved at the same time. After the sub-chassis 10 is fixed at a fixed position, the magnetic tape 6 is pulled out from the inside of the cassette 7 by the pinch roller 3, the vertical guide roller 4, and the inclined post 5.

FIG. 6 shows a state in which the loading of the cassette 7 is completed.

After the magnetic tape 6 is pulled out from the inside of the cassette 7, it is obliquely wound around the drum 1 by the inclined post 5. When the magnetic tape 6 is sequentially fed, the pinch roller 3 sandwiches the magnetic tape 6 together with the capstan motor 2, and the capstan motor 2 rotates to feed the magnetic tape 6. In the case of fast-forwarding or rewinding the magnetic tape 6, the pinch roller 3 separates from the capstan motor 2, the magnetic tape 6 is released, and the supply-side reel 8 and the winding-side reel 9 perform fast-forwarding and rewinding. .

When the magnetic tape 6 is wound up to the end, excessive tension caused by rotation of the reel damages the tape. Therefore, light is emitted from the light emitting portion 12 toward the optical sensors 13 fixed on the main chassis 11 on both sides of the cassette 7, and when the transparent leader portions at the beginning and the end of the magnetic tape 6 pass, The light is received by the optical sensor 13 through the reader to detect the tape end, and the rotation speeds of the supply reel 8 and the take-up reel 9 are adjusted so that the tape is not damaged.

Further, in the apparatus for recording / reproducing at least two kinds of cassettes, that is, a large L cassette and a small S cassette having different sizes of cassette halves, the above-mentioned series of operations from the insertion of the cassette to the completion of reading. Is the same.

[0009]

However, in the above conventional example, since the light emitting portion is fixed on the sub-chassis, the drum can only be brought close to the light emitting portion inside the mouse of the cassette, and the S cassette is exclusively used. The camcorder used for has a drawback that the tape running system becomes large and it is difficult to make the device compact. In addition, since the vertical guide roller, inclined post, and pinch roller are inserted inside the mouse when the cassette is inserted, it must be designed so that they do not interfere with the light emitting part.
There was a drawback that the tape running system had a low degree of design freedom.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a magnetic recording / reproducing apparatus in which a drum can be inserted into the mouse of a cassette and which can be made compact.

[0011]

In order to achieve the above object, the magnetic recording / reproducing apparatus of the present invention is provided with a positioning pin having a light emitting portion built therein, and the positioning pin is used to position the cassette and the tape. The end detection is performed at the same time.

[0012]

According to the present invention, since the drum can enter the inside of the mouse of the cassette by providing the light emitting portion inside the positioning pin for positioning the cassette, not only the combined device using both the S cassette and the L cassette can be used. ,
Even in a device such as a camcorder that uses the S cassette exclusively, a considerably compact device can be designed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view and a side view showing a schematic structure of a main part of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of FIG. FIG. 3 is a perspective view of the positioning pin used in FIGS. 1 and 2. Also,
1 to 3, those having the same or same functions as those in FIGS. 5 and 6 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 3, the positioning pin 14 is shown, and the positioning pin 14 has a light emitting portion provided therein, and light is emitted from the light emitting portion window 15 of the light emitting portion toward the optical sensor 13. The height position of the light emitting portion of the positioning pin 14 is the same as the axial line of the two optical sensors 13 fixed to both ends of the main chassis 11, and therefore the total length is longer than that of the conventional positioning pin.

In FIG. 1, the positioning pin 14 is arranged at the same position as the conventional positioning pin 14 'shown in FIG. 7, and the cassette 7 is inserted in the same manner as in the conventional case.

As is apparent from the perspective view of FIG. 2, since the light emitting portion and the light emitting portion window 15 of the positioning pin 14 enter the inside of the cassette 7, there is nothing inside the mouse of the cassette 7 that interferes with the drum 1. It is possible to form a compact tape running system in which the drum 1 is inserted inside the mouse.

In the tape running system described above, the tape end detection is carried out in the same manner as in the prior art, when the leader portions at the beginning and the end of the tape pass between the light emitting window 15 and the optical sensor 13, the light passes through the leader. Then, the light is detected by the light sensor 13.

FIG. 4 is a plan view showing a schematic structure of a main part of another embodiment of the present invention.

In FIG. 4, in a device capable of loading both a large L cassette 7 and a small S cassette 7'having different cassette halves, the positioning pin of the S cassette 7'is used in this embodiment. The positioning pin 14a built in the light emitting part is fixed, and another positioning pin 14b is used as the positioning pin of the L cassette 7. This gives L
Since the positioning pin 14b of the cassette 7 is located outside the positioning pin 14a of the S cassette, it does not block the light emitted from the positioning pin of the present invention. Therefore, even when the L cassette 7 is inserted, the optical sensor 13 is The light from the positioning pin 14a of this embodiment can be received. As a result, even in the combined device that can use both the S cassette and the L cassette, the drum 1 can be inserted into the inside of the mouse of the cassette 7, so that a compact tape running system can be used with high flexibility as in the device that also serves as the S cassette. Can be designed in degrees.

[0021]

As described above, according to the present invention, by providing the light emitting portion inside the cassette positioning pin, the drum can enter the inside of the mouse of the cassette, and not only the S cassette dedicated device but also the S cassette, Even in a device that also serves as an L cassette, there is an effect that a compact tape running system can be designed with a high degree of freedom.

[Brief description of drawings]

FIG. 1 is a plan view and a side view showing a schematic configuration of a main part of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is a perspective view of a positioning pin used in FIGS. 1 and 2.

FIG. 4 is a plan view showing a schematic configuration of a main part of another embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a schematic configuration of a main part when a cassette is inserted in a conventional magnetic recording / reproducing apparatus.

FIG. 6 is an explanatory diagram showing a schematic configuration of loading completion in FIG. 5;

FIG. 7 is a perspective view showing a positioning pin of the cassette in FIGS. 5 and 6;

[Explanation of symbols]

 1 Drum 2 Capstan Motor 3 Pinch Roller 4 Vertical Guide Roller 5 Inclination Guide Post 6 Magnetic Tape 7 Cassette 8 Supply Side Reel 9 Winding Side Reel 10 Sub Chassis 11 Main Chassis 12 Light Emitting Section 13 Optical Sensors 14, 14 ', 14a, 14b Cassette positioning pin 15 Light emitting part window

Claims (1)

[Claims] 1. A magnetic recording / reproducing apparatus, wherein a positioning pin having a light emitting portion is provided inside the magnetic recording / reproducing apparatus, and the positioning of the cassette and the end detection of the tape are simultaneously performed by the positioning pin.