JPS6325567Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an adapter for a small tape cassette, and applies back tension to the tape to prevent the tape from becoming sagging when loading the tape from the small tape cassette to a predetermined position in the adapter. It is an object of the present invention to provide an adapter for a small tape cassette that can prevent such problems.

1 and 2 are a partially cut-away plan view and a vertical sectional view taken along the line ``--'' in FIG. 1, respectively, of an embodiment of an adapter for a small tape cassette according to the present invention.
In the figure, an adapter 1 for a small tape cassette has substantially the same external dimensions as a standard tape cassette.
It has a small tape cassette storage section 2 inside, and an adapter lid 41 on the front.

Furthermore, loading arms 5 and 6 (rotating around pins 5a and 6a, respectively) having poles 3 and 4 at their tips, a gear train 7, and the like are incorporated.
The adapter lid 41 is approximately U-shaped, and has side plates 41a.
A pair of pins 42 (1 in Fig. 1) are integrally implanted in the
) are the pair of holes 1a of the adapter 1, respectively.
(only one is shown in FIG. 1) and is rotatably supported. Note that each pin 42 further has a pin portion 42a that projects diagonally downward.

The gear train 7 includes a gear 9 that rotates integrally with the operation knob 8, and a gear shaft 10 (a small diameter gear 10a, a large diameter gear 10).
(with a one-way pawl clutch between b), gear shaft 11
(having a small diameter gear 11a and a large diameter gear 11b), an intermediate gear 12 (having a disk gear 12a), and a gear shaft 13 (having a small diameter gear 13a and a large diameter gear 13b); The intermediate gear 12 is disposed between approximately a pair of upper and lower fixed plates 14 and 15, and the intermediate gear 12 is supported only by the upper fixed plate 14, and the gear shaft 1
3 is supported between the fixed plate 14 and the lower plate 1b of the adapter 1.

As shown in FIG. 5, the intermediate gear 12 has a cylindrical shape having an upper disk gear 12a, an inner peripheral fitting part 12b, and an outer peripheral part 12c, and a ball bearing 21 is fitted into the upper inner peripheral small diameter part 12d. It is attached to the fixing plate 14 by inserting the pin 22 fitted into the bearing 21 from below into the cut-out plate portion 14a of the upper fixing plate 14 and fixing it by caulking. According to this, only the upper side of the intermediate gear 12 is suspended from the fixed plate 14 via the ball bearing 21 and the pin 22, and the pin 22 is supported by the gap between the inner and outer rings of the ball bearing 21.
With the fulcrum as the fulcrum, it can freely swing in 360 degrees with respect to its central axis (pin 22) as shown by the arrow in FIG.

A brake arm 43 is rotatably supported on a pin 44 of the upper fixing plate 14 in FIGS. 1, 2, and 3A. The brake arm 43 has a spring 4 stretched between the right end of the arm and the convex portion 14b of the fixed plate 14.
5 in the clockwise direction, and the brake pad 43a at the left end of the arm is pressed against the outer peripheral portion 12c of the intermediate gear 12.
is pressed against. Further, a connect wire 46 is connected between the pin 43b at the right end of the arm and a predetermined height position of the pin portion 42a of the adapter lid 41. The connection between the connect wire 46 and the pin portion 42a is maintained by a packing (not shown) fitted to the pin portion 42a.

Next, to explain the structure of the small tape cassette attached to the above-mentioned adapter of the present invention, in FIGS. 2 and 6, reference numeral 23 denotes this small tape cassette. A lid 29 has a magnetic tape 27 wound around it, and further has a lid 29 on the front surface that rotates upward by 90 degrees using a pin 28 as a fulcrum.
has. The reel 25 has a reel gear 25a on the outer periphery of the lower flange, and is supported by the housing 24 with pins 30 without any play, and the reel 26 has a reel gear 25a on the outer periphery of the lower flange.
It is loosely fitted into the lower hole 24a of the housing 24. This small tape cassette 23 is stored in the storage part 2 of the adapter 1 shown in FIG. 1 (loading arms 5 and 6 are in the unloading position shown by solid lines in the figure) with the lid 29 open. Reel gear 25a is meshed with large diameter gear 13b.
After that, the top cover 31 of the adapter 1 is closed.

Next, when the operating knob 8 is manually rotated clockwise in FIG. At the same time, the arm 6 rotates counterclockwise via a link and a gear train (both not shown) to reach the position indicated by a chain double-dashed line in the figure. As a result, the tape 27 is pulled out from within the small tape cassette by the poles 3 and 4, and finally forms the front tape path 32 of the standard tape cassette. At this time, since the reel 26 is not rotated by a predetermined stop device (not shown), the right take-up reel 25 rotates in the direction of the arrow in FIG. 3A due to the tension of the tape to be pulled out. The tape is supplied from a predetermined amount of tape that has been previously wound on this take-up reel. Therefore, as the reel 25 rotates, the reel gear 25a, gears 13b, 13a,
The intermediate gear 12 is also rotated in the direction of the arrow A in the figure via the disc gear 25a.

However, the brake pad 43a of the brake arm 43 is pressed against the outer circumferential portion 12c of the intermediate gear 12, and a braking force is constantly applied thereto, and this braking force is conversely applied to the reel 25 via the gears 13a, 13b. , the reel 25 constantly applies back tension to the tape 27 without any unnecessary rotation during the above-mentioned rotation, and without any unnecessary rotation in the direction of the arrow at the end of loading. Thus, the tape forms a good, taut tape path 32 without sagging.

During loading of the tape 27, the small diameter gear 10a meshing with the gear 9 also rotates counterclockwise in FIG. 3A, but the large diameter gear 10b does not rotate due to the action of the one-way pawl clutch. The rotational force from 8 is not transmitted, and the tape 27
It simply rotates freely as the drawer is pulled out.

After the adapter 1 in which the predetermined tape path 32 has been formed is stored in the cassette housing of the recording/reproducing apparatus, the cassette housing is pushed down. Then, the adapter 1 moves downward, as shown in Fig. 2.
The fitting portion 12b of the intermediate gear 12 and the fitting portion 26a of the reel 26 are fitted to a pair of reel shafts 33 and 34 of the recording/reproducing device, respectively, so as to be able to rotate together. At this time, the adapter 1 is simply held horizontally and does not move downward.
Although the intermediate gear 12 moves downward in an arcuate motion, the intermediate gear 12 is swingable in 360 degrees with respect to its central axis as described above, and the reel 26 is also positioned in a predetermined position relative to the lower hole 24a of the housing 24. Because of the clearance, the reel shafts 33 and 34 can be fitted well without being pinched during fitting.

At the same time, the adapter lid 4 is moved downward by the adapter 1.
1 contacts and interlocks with a lid opening mechanism (not shown) of the recording/reproducing apparatus, and rotates upward by a predetermined angle as shown in FIGS. 4A and 4B, thereby opening the lid. As a result, A and B in the same figure
In the middle, the pin part 42a rotates and the connect wire 46
, and pull the right end of the brake arm 43 toward the adapter lid. Therefore, brake arm 4
3 rotates counterclockwise against the spring 45 to the position shown in FIG. 4A, and the brake pad 43a separates from the outer circumferential portion 12c of the intermediate gear 12 to release the application of the braking force. As a result, the reels 25 become idle.

Next, the tape 27 forming the standard path 32 is pulled out from inside the adapter 1 by a tape loading arm (not shown) of the recording/reproducing device and loaded onto a guide drum (not shown). The reel 25 in the idle state is freely rotated as the tape is drawn out, thereby facilitating the loading.

Next, when recording or playback is performed by the recording/playback device, the reel shaft 33 on the right side in FIG.
(Intermediate gear 12) is rotated clockwise.
Then, the disc gear 12a, gears 13a, 13
b, the reel 25 is similarly driven to rotate clockwise via the reel gear 25a, and the tape 27 is rotated in the first direction.
It travels in the direction of arrow A in the figure to perform the above-mentioned recording or playback. At this time, the gear shaft 11 is displaced in the escape direction with respect to the intermediate gear 12 as shown in FIG.
The engagement between 1b and 12a is released, and the unnecessary load is removed. When rewinding the tape, the reel shaft 34 (reel 26) on the left in FIG. 2 is rotated counterclockwise, and the tape 27 is run at high speed in the direction of arrow B in FIG. Also at this time, gear 11b,
12a is disengaged.

Next, when recording and playback are finished, the tape loaded on the guide drum is moved to the reel shaft 33.
The intermediate gear 12 is driven to rotate in the direction of the arrow in FIG. 4A, thereby being pulled back into the adapter 1 and forming the tape path 32 again. Next, when the adapter 1 is taken out from the recording/reproducing device, the adapter lid 41 is returned to its closed state and becomes the state shown in FIGS. 12
Press into c.

Next, in order to take out the small tape cassette 23 from the adapter 1, first rotate the operation knob 8 counterclockwise in FIG. 5 returns from the two-dot chain line position to the unloading position shown by the solid line in the figure, and the arm 6 similarly returns to the solid line position. It should be noted that the gear 11b returns to mesh with the disc gear 12a when the operating knob 8 returns to its slightly angular rotation. Therefore, from this point on, the reel 25 is rotationally driven clockwise by sequential meshing of the gear train 7 (gear 9, gear shafts 10, 11, intermediate gear 12, gear shaft 13, reel gear 25a) to wind the tape 27 and pass the tape path. Return to the solid line position. Therefore, the small tape cassette 23 can be taken out from the adapter 1 in this state. Note that while the cassette 23 having the tape path at the solid line position is stored in the adapter 1, the brake force from the brake arm 43 is applied to the gear train 7, so there is no fear that the tape 27 will slacken.

As mentioned above, according to the adapter for a small tape cassette of the present invention, when loading a tape from inside the small tape cassette to a predetermined position in the adapter, the intermediate gear etc. that interlocks with the reel in the cassette that is rotated at idle is activated. Since the braking force is applied by pressing the brake member, the reel does not undergo unnecessary inertial rotation during loading, and the tape is drawn out with back tension applied to it at all times. It has the advantages of not causing tape sag, forming a tape path with good loading conditions, and improving operability.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 are respectively a partially cutaway plan view and a longitudinal sectional view taken along line - in Fig. 1 of one embodiment of an adapter for a small tape cassette according to the present invention, Fig. 3A and Fig. 3B are respectively a plan view and a partially cutaway side view of the main parts of the adapter before operation, Fig. 4A and Fig. 4B are respectively a plan view and a partially cutaway side view of the main parts of the adapter after operation, Fig. 5 is a longitudinal sectional view of other main parts of the adapter, and Fig. 6 is a perspective view of the small tape cassette. 1... adapter, 5, 6... loading arm, 7... gear train, 8... operation knob, 12... intermediate gear, 12c... outer periphery, 23... small tape cassette, 25, 26... reel, 32... tape path, 33, 34... reel shaft, 41... adapter cover, 43... brake arm, 43a... brake pad, 46... connector rod.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An adapter for a small tape cassette used when a tape cassette smaller than a standard tape cassette is attached to a recording/reproducing device for the standard tape cassette, which A tape loading arm that pulls out from a position in the cassette to a predetermined position in the adapter while rotating the take-up reel in the cassette; A small tape comprising a rotating member that drives a take-up reel in the cassette, and a brake member that is pressed against the rotating mechanism or rotating member by the urging force of a spring member to apply a braking force when the tape is pulled out. Adapter for cassette. 2. The above-mentioned brake member is configured to release its braking force in conjunction with the opening operation of the cover of the adapter when the adapter is attached to the above-mentioned recording/reproducing device. Adapter for the small tape cassette listed.