JP2525351Y2 - Cassette support mechanism such as R-DAT - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a cassette support mechanism such as an R-DAT (Rotary Digital Audio Tape Recorder) or 8mm VTR, and in particular, a tape provided immediately before the cassette. The present invention relates to a cassette support mechanism such as an R-DAT in which a level holding member for determining a position of a cassette in a height direction is attached to a guide via a height adjustment mechanism.

"Prior art" For example, as shown in FIG.
In order to accurately mount the cassette 1 on the deck of the R-DAT, a reference plane ZL in the height direction and reference holes 6c for positioning the plane are provided.

On the other hand, on the mechanical chassis 9 of the R-DAT, the sixth
As shown in the figure, reference pins 40 with a flange 40a are provided upright.

Then, the cassette 1 is inserted into the reference pins 40, 40 to position the cassette 1 in a plane, and the reference pins 4
The height was determined by placing the reference plane ZL on the upper surface of each of the flanges 40a of 0, 40.

"Problem to be solved by the invention" The conventional reference pins 40, 40 of R-DAT, etc., are positioned in the height direction and the plane direction by the same pin, so that a high-precision finish is inevitable. Location technology was required.

On the other hand, since the reference pin 40 is positioned with high precision, it is sometimes used as a guide pin of a pinch roller which is one of the tape loading members. In this case, the rod pin was crowned with a cap consisting of a flange and a conical projection to serve as a reference pin. However, high-precision finishing and mounting techniques were required.

Further, in R-DAT, 8 mm VTR, etc., it is desired to reduce the size and weight, reduce the number of parts, increase the number of functions, reduce the cost, and increase the operability.

This invention was made in view of the above points,
R-DA that can accurately support cassettes without requiring high-precision finishing and installation techniques, and that can reduce costs
The purpose is to provide a cassette support mechanism such as T.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, a fixed guide for determining a tape pass zone, which is erected immediately before a cassette mounting position, and a cassette, which is erected on a mechanical chassis, A reference pin for determining the position in the planar direction, and a level holding member for determining the position in the height direction of the cassette provided on the fixed guide via a height adjusting mechanism. It is.

[Operation] When the cassette 1 held by the cassette holder (not shown) is slotted in, the lid 3 of the cassette 1 is opened by the lid opening mechanism, and the tape 2 can be pulled out.

At the same time, as shown in FIGS. 1 and 2, the reference holes 6c, 6c of the cassette 1 are fitted into the reference pins 10, 10 implanted in the mechanical chassis 9, and the plane position of the cassette 1 is determined. You.

Then, the reference surfaces ZL formed in the guide zones 6b, 6b of the cassette 1 are placed on the overhanging upper surface of the level holding member 12 attached to the fixed guide 11, and the height position of the cassette 1 is determined. You. In addition, since the position of the level holding member 12 in the height direction is appropriately set in advance by adjusting the nut 16, the cassette 1 is placed at an accurate position, and the signal can be properly reproduced.

 Then, loading is performed.

"Example" Next, an example in which a cassette support mechanism such as an R-DAT according to the present invention is used for an R-DAT will be described in detail with reference to the drawings.

The DAT cassette 1 used for R-DAT is a flangeless cassette that can record and reproduce data on a standard tape 2 for two hours continuously. As shown in FIGS. 3 and 4, the lid 3 is opened and closed forward. An upper shell 4 that is freely supported,
Consists of a lower shell 6 in which a slider 5 is slidably fitted on both side surfaces and a lower surface. Unless it is mounted on a mechanical chassis 9, hub holes 8, 8 and a tape 2 outlet (not shown).
Is a completely closed mechanism with no opening.

On the lower surface of the cassette 1, a reference surface ZL in the height direction indicated by oblique lines in FIG. 4 is provided with a step 6a at the rear center on the lower surface of the lower shell 6 and guide zones 6b, 6 on both front sides.
Each formed in b.

Further, reference holes 6c, 6c for determining a planar position when the cassette 1 is mounted are formed in the guide dones 6b, 6b of the lower shell 6 as shown in FIGS. 1 and 4.

The cassette 1 as described above is mounted on, for example, a mechanical chassis 9 as shown in FIG. 1, FIG. 2 and FIG.

In FIGS. 1 and 2 showing an example of the first embodiment,
The planar position of the cassette 1 is determined by the reference pin 10 implanted in the mechanical chassis 9, and the height is determined by the level holding member 12 attached to the fixed guide 11.

The reference pins 10, 10 for determining the plane position of the cassette 1 are
As shown in FIG. 1, the upper end is implanted in a mechanical chassis 9 with a conical round pin, and both reference holes 6c, 6c of the cassette 1 are fitted.

In general, the fixed guide 11 is provided so that even if the winding diameter of the tape 2 pulled out of the cassette 1 changes,
The tape fulcrum of the tape 2 is determined so as not to hit the inner wall of the cassette 1. A tape pass zone PZ is formed between the tape 30 and the reel 30 of the cassette 1 as shown by oblique lines in FIG.

Further, the fixed guide 11 determines the height of the outlet (inlet) of the cassette 1 because the cassette 1 is flangeless.

As shown in FIG. 1, the fixed guide 11 in the embodiment of the present invention includes a shaft 13 having a pedestal 13a, a coil spring 14 loosely fitted on the shaft 13, and the above-described level holding member.
12, a guide 15 and a nut 16.

The shaft 13 erected on the mechanical chassis 9 has a D-shaped cross section as shown in FIG. 2, and the coil spring 14 is loosely inserted on the pedestal 13a, and the level holding member 12 and the guide 15 are inserted and fixed. The nut 16 is screwed at the upper end.

The coil spring 14 and the nut 16 constitute a height adjusting mechanism for adjusting the position of the cassette 1 in the height direction. That is, the level holding member 12 is urged upward by the coil spring 14, and the position is regulated by the nut 16 screwed to the shaft 13. Therefore,
Tightening the nut 16 moves the position of the level holding member 12 downward, and loosening the nut 16 moves the position of the level holding member 12 upward. Thus, by adjusting the nut 16, the position of the level holding member 12 in the height direction can be appropriately set.

When the cassette 1 held by a cassette holder (not shown) is slotted into the R-DAT provided with the fixed guide 11, the lid 3 of the cassette 1 is opened by the lid opening mechanism, and the tape 2 can be pulled out. Becomes

At the same time, as shown in FIGS. 1 and 2, the cassette 1 is inserted into the reference pins 10 and 10 implanted in the mechanical chassis 9.
Are inserted, and the plane position of the cassette 1 is determined.

Then, the reference surfaces ZL formed in the guide zones 6b, 6b of the cassette 1 are placed on the overhanging upper surface of the level holding member 12 attached to the fixed guide 11, and the height position of the cassette 1 is determined. You. By adjusting the nut 16, the position in the height direction of the level holding member 12 can be appropriately set, so that high-precision machining is not required as in the conventional reference pin 40 (FIG. 6). The tape 2 of the cassette 1 is pressed against the drum 20 or the like at an accurate position, so that the signal can be properly reproduced.

As shown in FIG. 5, the tape 2 pulled out from the cassette 1 is fixed to the mechanical chassis 9, the tension regulator (ten leg) 16, and the tape guide 1.
7, Roller guide 18 and inclined guide 19, drum 2
After sliding on the tape 0, the tape passes through the tape path P formed by the inclined guide 19, the return guide 21, the fixed guide 22, the capstan 23, the swing-out guide 24, and the fixed guide 11 on the return path, and then to the rewind reel of the cassette 1. Rewind. In the capstan 23 in the tape path P, the tape 2 is pressed against the rotating capstan 23 by the pinch roller 25.

[Effects of the Invention] As described above, the cassette support mechanism such as the R-DAT according to the invention includes a reference pin for supporting the cassette in a planar position,
The level holding member for supporting the reference position in the height direction of the cassette is separated, and the level holding member is attached to a fixed guide via a height adjusting mechanism.

Therefore, it is easier to manufacture and can be mass-produced at lower cost than a reference pin as a versatile part that determines both the reference position in the plane direction and the height direction of the cassette. Cost can be reduced without hindering the production.

In particular, since the reference pin is positioned with high precision in the planar direction, it is more effective when the reference pin is also used as a guide pin or the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a cassette support mechanism such as an R-DAT according to the present invention, and FIG.
FIG. 3 is a perspective view of the cassette, FIG. 4 is a bottom view of the cassette, FIG. 5 is a schematic plan view showing a tape path, and FIG. 6 is an explanatory view of a conventional example. It is a perspective view. PZ Tape pass zone ZL Reference plane (height direction) 1 Cassette 6 Lower shell 6c Reference hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A fixed guide for determining a tape path zone, which is provided immediately before a cassette mounting position, a reference pin for determining a position of a cassette set in a mechanical chassis in a planar direction, and a height adjusting mechanism. And a level holding member for determining the position of the cassette in the height direction provided on the fixed guide. 2. A height adjusting mechanism comprising: a coil spring for urging the level holding member in a height direction; a coil spring for holding the level holding member against the coil spring; 2. The R-DA according to claim 1, comprising a nut for adjusting a position of the R-DA.
T and other cassette support mechanisms.