JPH0441426B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mounting device for magnetic tape cassettes.

Structure of conventional example and its problems In a conventional magnetic recording/reproducing apparatus (such as a video apparatus) having an automatic loading device for magnetic tape cassettes (hereinafter simply referred to as cassettes), a take-up reel stand and a supply reel stand are connected. Detects the number of rotations, and uses this number of rotations to calculate the remaining amount of tape,
A method was adopted in which the results were displayed on a digital counter. Therefore, there are disadvantages in that it is not possible to directly check the remaining amount of tape and it is not possible to visually check the rotation of the cassette hub.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks, and an object thereof is to provide a cassette mounting device that allows the remaining amount of magnetic tape at the cassette operating position and the rotational state of the cassette hub to be visually observed through a reflector. .

Structure of the Invention In order to achieve the above object, the cassette loading device of the present invention is guided by guide grooves formed in a pair of left and right side plates and is movable between a cassette insertion position and a cassette operating position above the reel stand. In the cassette mounting device having a cassette holder and a moving means for moving the cassette holder between the above two positions, a reflective surface is provided on the lower surface of the mounting plate provided on the upper surface of the pair of side plates at a position above the reel stand. a reflecting mirror rotatably supported in a direction toward and away from the reel stand; urging means for swinging and urging the reflecting mirror toward the reel stand; and a rotation fulcrum disposed at one end. It is located closer to the cassette insertion position than the rotational fulcrum of the reflector, and is positioned so that the other end slides on the upper end surface of the cassette holder, and is positioned between the cassette holder and the reflector when the cassette holder is moved. a guide member that prevents contact between the cassette holder and the reflector, and holds the reflector in a position such that the cassette hub position reflects the cassette insertion slot when the cassette is in the operating position; In the operating position, the angle formed by the reflecting mirror and the top surface of the cassette holder is approximately 45 degrees, and the angle formed by the guide member and the top surface of the cassette holder is less than 45 degrees. It is configured so that

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In Figures 1 to 4, 1 is a VTR magnetic tape cassette (hereinafter simply referred to as a cassette) 2.
This cassette holder holds a cassette and is movable by a moving means 4 between a cassette insertion position and a cassette operating position on the reel stand 3. That is, bar-shaped protrusions 5 are provided on both sides of the cassette holder 1, and the protrusions 5 are movably engaged with guide grooves 7 formed in a pair of left and right side plates 6 arranged on both sides of the cassette holder 1. Further, a rotary lever 9 is rotatably attached to the outer side of the pair of side plates 6 via a shaft 8 as shown by arrows A and B, and a rotary lever 9 is formed on the rotary lever 9. The protrusion 5 is movably engaged with the elongated hole 10. Therefore, when the rotary lever 9 is rotationally driven in the directions of arrows A and B by a drive device (not shown), the cassette holder 1 is moved between the cassette insertion position and the cassette operating position. In addition, the guide groove 7
consists of a horizontal portion 7a and a vertical portion 7b, so that the cassette holder 1 moves horizontally from the cassette insertion position to a position above the reel stand 3, and then descends onto the reel stand 3. Reference numeral 11 denotes a mounting plate provided on the upper surface of the pair of left and right side plates 6, and in the cutout hole 11a formed above the reel stand 3, a reflecting mirror 12 having a reflective surface on the lower surface is installed with respect to the reel stand 3. The reflecting mirror 12 is swingably supported in the direction of approaching and separating, and the reflecting mirror 12 is pushed against the reel stand 3 by the urging means 13.
It is biased to swing to the side. That is, the reflector holder 14 holding the reflector 12 is swingably supported on the bracket portion 11b of the mounting plate 11 by a horizontal shaft 15 in a direction perpendicular to the direction in which the cassette 2 is inserted. A coil spring (an example of a biasing means) 13 is attached to bias the reflector holder 14 toward the reel stand 3 side. 16 is the mounting plate 11
The movement of the cassette holder 1 is controlled by a guide member whose one end is pivotally supported at a position on the left and right side of the cassette 2 from the reflector 12, and whose other end is swingable vertically at a position below the reflector 12. At times, it is located between the cassette holder 1 and the reflector holder 14 to prevent contact between the cassette holder 1 and the reflector 12, and when the cassette 2 is in the operating position, the reflector 12 is This is to hold the cassette in a position where it will be reflected in the cassette insertion slot. Further, in the cassette operating position, the angle formed by the reflecting mirror and the top surface of the cassette holder is approximately 45 degrees, and the angle formed by the guide member and the top surface of the cassette holder is approximately 45 degrees. The angle is substantially the same as the angle formed by the reflecting mirror and the reflecting mirror, and is smaller than 45 degrees. Note that the reflector holder 14 and the guide member 16 are in contact with each other via a protrusion 14a provided at the end of the reflector holder 16. A pair of left and right lamps 17 are attached to the mounting plate 11 via a substrate 18, and are used to illuminate the cassette 2 located above the reel stand 3. In addition,
This lamp 17 is designed to light up only when the cassette holder 1 is in the cassette operating position.

Next, the operation will be explained based on the drawings.

As shown in FIG. 3, when the cassette 2 is inserted into the cassette holder 1 through the cassette insertion opening 20 on the front surface of the case 19, the cassette holder 1 is guided by the guide groove 7 and moves in the directions of arrows C and D. As shown in the figure, the cassette 2 is set on a reel stand 3. At this time, the reflecting mirror 12 is
Since the reflector 12 is pressed against the upper surface of the cassette holder 1 through the
In conjunction with the movement of , it swings from the approximately horizontal position in FIG. 8 to the approximately 45° inclined position in FIG. 4 as shown by arrow E,
At the same time, the lamp 17 lights up, and the hub position of the cassette 2 is reflected toward the cassette insertion slot 20 side.
In this way, even when the cassette 2 is in operation, the cassette 2 on the reel stand 3 can be seen, and therefore the remaining amount of magnetic tape and the rotation of the cassette hub can be visually determined. Incidentally, when the cassette 2 is taken out, the lamp 17 is automatically turned off, and the reflecting mirror 12 also returns to its original position as the cassette holder 1 moves.

Effects of the Invention As described above, according to the present invention, the cassette set on the reel stand can be seen through the reflecting mirror, and the remaining amount of magnetic tape in the cassette can be checked, as well as the rotation of the cassette hub can be checked. The condition can be checked visually. Further, according to the present invention, when the cassette holder moves from the cassette actuating device to the cassette insertion position, that is, when the reflecting mirror is rotated against the biasing means, the other end of the guide member and the top surface of the cassette holder This friction occurs as a reaction force to the force pushing up the guide member, but in the cassette operating position, the angle formed by the reflector and the top surface of the cassette holder is approximately 45 Since it is configured so that the angle formed by the guide member and the top surface of the cassette holder is less than 45 degrees, the reaction force to this pushing up force is small. Therefore, the cassette holder and the reflecting mirror can be smoothly moved from the cassette operating position to the cassette insertion position with a small driving force.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of the main parts, FIG. 2 is a plan view of FIG. 1, and FIGS. 3 and 4 are side views showing the operation. . 1...Cassette holder, 2...Magnetic tape cassette for VTR (cassette), 3...Reel stand,
4...Moving means, 5...Protrusion, 6...Side plate, 7...
...Guide groove, 11...Mounting plate, 12...Reflector,
13...Biasing means (coil spring), 14...Reflector holder, 16...Guide member, 17...Lamp, 20...Cassette insertion slot.

Claims (1)

[Claims] 1. A cassette holder that is guided by guide grooves formed on a pair of left and right side plates and is movable between a cassette insertion position and a cassette operating position above the reel stand, and the cassette holder is moved between the above two positions. In the cassette mounting device having a moving means, the mounting plate provided on the upper surface of the pair of side plates is provided at a position above the reel stand, and has a reflective surface on the lower surface and is supported rotatably in a direction toward and away from the reel stand. a reflecting mirror, a biasing means for swinging and biasing the reflecting mirror toward the reel stand, a pivot point disposed at one end located closer to the cassette insertion position than the pivot point of the reflecting mirror; The end portion is positioned so as to slide on the upper end surface of the cassette holder, and is positioned between the cassette holder and the reflecting mirror when the cassette holder is moved to prevent contact between the cassette holder and the reflecting mirror, and to prevent the cassette holder from coming into contact with the reflecting mirror. A guide member is provided to hold the reflector in a position such that the cassette hub position is reflected to the cassette insertion slot when in the operating position, and when the cassette is in the operating position, the reflector and the upper surface of the cassette holder are connected to each other. The cassette mounting device is characterized in that the angle formed by the guide member and the upper surface of the cassette holder is approximately 45 degrees, and the angle formed by the guide member and the upper surface of the cassette holder is smaller than 45 degrees.