JPS6137697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette adapter used when, for example, a tape cassette smaller than a standard type is installed in a standard type recording/reproducing machine, and the present invention relates to a tape cassette adapter that is used when a tape cassette smaller than a standard type is attached to a standard type recording/reproducing machine. A small tape cassette storage part is provided in the case body, and a tape pull-out mechanism is provided in the case body to draw out the tape in the small tape cassette stored in this storage part to form a predetermined tape path. By configuring the tape pull-out mechanism so that even if the operating member of the pull-out mechanism is actuated suddenly, the tape pull-out member operates gradually, the tape path formation of the tape is favorable, and for example, the tape becomes loose or To provide a tape cassette adapter that will not be damaged.

If you want to use a small tape cassette used in a recording/playback machine such as a video tape recorder in a recording/playback machine that is larger than this small tape cassette, for example, a standard type tape cassette, you must use a small tape cassette. You will need an adapter to convert it to a standard tape cassette. If the tape path of a small tape cassette is configured the same as that of a standard tape cassette, this adapter may simply serve as a housing. Even though it is small, it is not that small because the tape path is the same as that of a standard type tape cassette. Therefore, in order to make a small tape cassette substantially smaller, for example, the supply reel in the small tape cassette must be In order to make the distance from the take-up reel smaller than that of a standard type tape cassette, and to record and play back a small tape cassette configured in this way on a standard type recording/playback machine, an adapter can be used to connect the small tape cassette to the standard type. The tape path must be changeable to accommodate standard types of recording/playback equipment.

The present invention has been made in accordance with the above object, and examples thereof will be described below.

Figures 1a, b, c, and d are a plan view, a side view, a rear view, and a bottom view of a tape cassette smaller than a standard type tape cassette used, for example, in a standard type recording/reproducing machine. 2 is a plan view of this small cassette with the upper half removed, and FIG. 3 is a sectional view.

In the figure, A is a small cassette, and the frame of this small cassette A consists of an upper half 1, a lower half 2, and a front cover 3 for protecting the tape. It is rotatably attached to the upper part by a support shaft 4. One end of the sliding piece 7, which is held slidably in the groove 5b by being pressed by a substantially U-shaped spring 6 inserted into a groove 5a bored in the side surface of the upper half 1, is pushed forward. It is configured to abut against the lid 3, and the front lid 3 is maintained in that state when it is closed, and is maintained in its open state when the front lid 3 is opened.

A supply reel 8 and a take-up reel 9 are arranged in the small cassette A, and the distance between the supply reel 8 and the take-up reel 9 is such that the distance between the supply reel 8 and the take-up reel 9 is a standard type that cannot be installed only in the small cassette A. The distance is shorter than the distance between the supply reel disk and the take-up reel disk of the recording/reproducing machine.
Further, the magnetic tape 10 is arranged such that it runs along a predetermined running path between the supply reel 8 and the take-up reel 9. That is, the magnetic tape 10 is moved from the supply reel 8 to the guide pole 11.
a, 12b, and 11b, and then wound onto the winding reel 9. An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8.
Furthermore, an uneven groove 15 that engages with the uneven groove 14 is also formed at a predetermined position of the lower half 2 corresponding to the uneven groove 14 of the lower flange 13, and is supplied by the action of a leaf spring 16 attached to the upper half 1. The side reel 8 is biased toward the lower half 2 side, and the uneven groove 14
and 15 mesh, and the supply reel 8 is fixed.
This prevents the magnetic tape wound on the supply reel 8 from loosening. When the small cassette A is installed in the recording and reproducing machine, the supply reel 8 is lifted by the supply reel disk 80 of the recording and reproducing machine by a specified amount toward the half 1 side against the repulsive force of the leaf spring 16. , the engagement between the uneven grooves 14 and 15 is released and rotation becomes possible. That is, a hole 17 for inserting the supply reel disk 80 of the recording/reproducing machine is formed in the lower half 2 at a position corresponding to the supply reel 8, and the supply reel disk 80 is inserted into the supply reel 8. Become so. The take-up reel 9 is inserted into a shaft 18 fixed to the lower half 2 and is rotatable about the shaft 18.

A brake mechanism is disposed on the take-up reel 9 so that the take-up reel 9 does not rotate when the small cassette A is not installed in the recording/reproducing machine. This brake mechanism consists of a brake 20 that presses the upper surface of the peripheral edge of the lower flange 19 of the take-up reel 9. This brake 20 is inserted into a shaft 21 formed integrally with the lower half 2, and is mounted on a spring. In the state where it is pressed and energized by the action, the shoe portion 20a of the brake 20 comes into pressure contact with the surface of the lower flange 19, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen.
When the small cassette A is attached to a recording/reproducing machine or an adapter described later, a force is applied that resists the repulsive force of the spring, and the shoe portion 20a of the brake 20 is separated from the lower flange 19 surface, causing the take-up reel 9 to rotate. become able to. The rotation of the take-up reel 9 is different from that of the supply reel 8;
Teeth 22 formed on the peripheral side surface of the lower flange 19
This is done by means of a driving force transmission medium that meshes with the
Therefore, when the small cassette A is attached to a recording/reproducing machine or an adapter to be described later, the lower half 2 has a notch 23 so that the driving force transmission medium can mesh with the teeth 22.
is formed.

FIG. 4 is a plan view of the tape cassette adapter according to the present invention with the upper half removed;
Figures a, b and 6 are explanatory diagrams of the buffering means of the driving force transmission medium.

In the figure, B is an adapter having the same external shape as a standard type tape cassette, and this adapter B consists of a lower half 30 and an upper half (not shown).
The upper half and the lower half 30 are configured with a storage section for storing a small cassette A.

In addition, when the front lid 3 of the small cassette A is opened and placed in the storage section, the lower half 30 has a tape pull-out member located in the notch 24 formed in the lower half 2 of the small cassette A. A tape pull-out mechanism is provided for pulling out the magnetic tape 10 in the cassette A to form a predetermined tape path. This tape pull-out mechanism consists of an operating lever section,
It consists of a loading pole part and a driving force transmission medium part. That is, if the magnetic tape is set in the adapter with the front cover open without pulling out the magnetic tape from the small cassette A, the loading levers 31 and 3 will be positioned in the notch 24 of the small cassette A.
2. When the guide rollers 33 and 34 provided at the tips of the loading levers 31 and 32, the operating lever 35, and the operating lever 35 are driven from the two-dot chain line position to the solid line position in FIG.
1 and 32 are rotated from the two-dot chain line position to the solid line position in FIG. Examples of the force transmission medium include connectors 36 and 37 connected to the operating lever 35, an L-shaped lever 38 connected to the connector 36, a lever 39 connected to the L-shaped lever 38, and a lever connected to the lever 39. 40, a gear 41 provided integrally with the lever 40;
It is comprised of a gear 42 provided integrally with the loading lever 31, a belt 43 connecting the gear 41, a connector 37, and a rotating lever 44 connected to the loading lever 32. Then, when the operating lever 35 is rotated from the two-dot chain line position to the solid line position, the connector 37 moves,
The rotation lever 44 rotates clockwise around the support shaft, and the rotation of the rotation lever 44 moves the loading lever 32 around the support shaft from the two-dot chain line position to the solid line position, and guides The magnetic tape is pulled out from the small cassette by the roller 34, and the L-shaped lever 38 is rotated clockwise about the support shaft via the connector 36, and the lever 39 is moved to the right in FIG. As a result, the gear 41 rotates clockwise via the lever 40, and as a result, the loading lever 31 is rotated clockwise via the belt 43 from the two-dot chain line position to the solid line position, and the guide roller 33 The magnetic tape is pulled out from the small cassette by the guide rollers 33, 3.
4, a tape path approximately the same as that of a standard type tape cassette is formed.

However, if the mechanism of the driving force transmission medium section is simply configured as described above, when the operation lever 35 is suddenly operated, the loading levers 31 and 32 are also suddenly operated, and the magnetic tape may be damaged by the impact. Otherwise, the magnetic tape may be stretched excessively and become loose when forming the tape path of the magnetic tape, resulting in poor tape path formation and, as a result, poor recording and reproduction.

Therefore, if an operating speed regulating mechanism is provided in this driving force transmission medium section, the above-mentioned problem can be completely solved and tape path formation can be improved. For example, there is an oil damper-type buffer mechanism in which a rotating body is attached to the lower part of the pivot of the rotating lever, and this rotating body is placed in silicone oil.
Alternatively, a buffer mechanism that utilizes the elastic force of a spring, or a buffer mechanism that configures a speed reduction mechanism using gears, etc. can be considered. Note that these operating speed regulating mechanisms apply not only to the driving force transmission medium section on the loading lever 32 side but also to the loading lever 3 side.
It is also configured in the driving force transmission medium section on the first side.

Next, we will discuss 1 concrete implementation of these buffer mechanisms.
To explain an example, FIGS. 5a, 5b and 6 are explanatory diagrams when an oil damper and a leaf spring are used, and a part of the rotary lever 44 is attached to the leaf spring 4.
4', the rotary lever 44 is provided with an elastic force, an oil damper 46 is provided at the lower part of the support shaft 45 of the rotary lever 44, and an L-shaped lever 38
A part of the L-shaped lever 3 is made up of a leaf spring 38'.
8 to have elastic force, and the support shaft 4 of the gear 41
7 is provided with an oil damper 48 at the bottom thereof. In addition, 49 is a rotating body, and 50 is silicone oil.

FIGS. 7a and 7b are explanatory diagrams when a spring is used instead of the above-mentioned leaf spring. For example, the connector 37 on the loading lever 32 side is configured with connectors 51 and 52.
The two are connected by a spring 53. still,
54 is a guide rod, 55 is a guide groove, and 56 is a convex portion that slides in the guide groove 55. Further, a shock absorbing mechanism having a structure similar to this shock absorbing mechanism is provided, for example, in the lever 39, and is configured to weaken the force of the operating lever 35 and transmit it to the loading levers 31 and 32.

As mentioned above, if the buffer mechanism is configured as shown in FIGS. 5a, b, and 6, for example, in FIG. Even if the connector 37 is moved, only the plate spring 44' of the rotary lever 44 connected to the connector 37 is bent, and the other end of the rotary lever 44 is not displaced by the same amount as the displacement position of the connector 37. As the plate spring 44' returns to its original position, the loading lever 32 is displaced while being subjected to viscous resistance from the oil damper, and the loading lever 32 gradually rotates in a predetermined direction. Also, the loading lever 31
Due to the bending of the leaf spring 38' portion of the L-shaped lever 38, the sudden operation of the operating lever is alleviated, and the leaf spring 38'
As 8' returns to its original position, it gradually rotates in a predetermined direction while being subjected to viscous resistance from the oil damper.

In particular, since an elastic means such as a spring is provided between the operating speed regulating means such as an oil damper and the operating lever 35, the operating lever 35 can be operated smoothly without feeling heavy. 35 has good operability.

That is, in order to prevent rapid movement of the loading levers 31 and 32, an operating speed regulating means such as an oil damper is provided in the driving force transmission medium section, but if only the operating speed regulating means is provided, the operation will be difficult. It takes more force than necessary to operate the lever 35,
Therefore, if an elastic means such as a spring is provided between the operating speed regulating means and the operating lever 35, the resistance force against the operating lever 35 will be reduced accordingly, and moreover, The driving force is once stored in the elastic means, and this stored force is gradually transmitted by the operation speed regulating means such as an oil damper, and the operation of the loading levers 31 and 32 becomes slow. .

Incidentally, if you try to perform the above-mentioned action only with elastic means such as a leaf spring or sprinkling without using an operating speed regulating means such as an oil damper, this will cause the loading lever 3 to
This merely delays the start of the operations of Nos. 1 and 32, and the effect is not sufficient.

As mentioned above, the tape cassette adapter according to the present invention is an adapter used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or reproducing machine. A loading means for pulling out the tape near the front surface of the adapter, an operating means for driving the loading means, and a driving force transmitting means for transmitting the driving force of the operating means to the loading means, the driving force transmitting means Since the adapter has an operating speed regulating means and an elastic means is provided between the operating speed regulating means and the operating means, by using such an adapter, a small tape cassette can be changed to a substantially smaller tape cassette. In addition, when a small tape cassette is attached to the adapter and a predetermined tape path is formed, the tape path can be formed well.
For example, when forming a tape path, the tape will not be damaged, the tape path will not become loose, the operating means will be easier to operate, and the small cassette loaded in the adapter can be attached to the recording/playback machine. It has features such as being able to reliably record and play back without damaging the tape.

[Brief explanation of the drawing]

Figures 1a, b, c, and d, Figures 2 and 3 are explanatory diagrams of a small tape cassette, Figure 4 is an explanatory diagram of one embodiment of the tape cassette adapter according to the present invention, and Figure 5 a, b, FIG. 6 and FIG. 7 a, b are explanatory diagrams of the buffer mechanism. A...Small cassette, B...Adapter, 31,
32... Loading lever, 33, 34... Guide roller, 35... Operation lever, 36, 37...
... Connector, 38 ... L-shaped lever, 44 ... Rotating lever, 38', 44' ... Leaf spring, 53 ... Spring.

Claims (1)

[Claims] 1. An adapter used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or reproducing machine, and includes a loading means for pulling out the tape from the small tape cassette near the front of the adapter, and An operating means for driving the loading means, and a driving force transmitting means for transmitting the driving force of the operating means to the loading means, the driving force transmitting means having an operating speed regulating means, and the operating speed regulating means. An adapter for a tape cassette, characterized in that an elastic means is provided between the means and the operating means.