JPS6312442Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a small tape cartridge adapter that allows a small tape cartridge to be used by being loaded into a magnetic recording device for a large tape cartridge.

In this type of adapter, a small tape cartridge is stored in an adapter body having substantially the same external shape as a large tape cartridge, and is loaded into a magnetic recording device. Since the small tape cartridge itself functions independently, in order to prevent the recorded contents from being erased accidentally, the small tape cartridge is equipped with a breakable piece on its outer wall to prevent accidentally erasing. Therefore, even when a small tape cartridge is stored in the adapter body and loaded into a magnetic recording device, the presence or absence of the accidental erasure prevention piece on the small tape cartridge can be detected by the magnetic recording device based on the external shape of the adapter body. It must be. In this case, preparing two types of adapter bodies, one with and one without a piece to prevent accidental erasure, is cumbersome to handle, and it is inevitable that the adapter will be used incorrectly.

Therefore, the present applicant has previously proposed an adapter that allows a single adapter to correctly detect whether or not a small tape cartridge stored in the tape cartridge has an erroneous erasure prevention piece when loaded into a magnetic recording device. FIG. 8 shows an example of this, in which the contact terminal 64 engages in the break-off recess 66 of the accidental erasure prevention piece (removed in the figure) formed on the outer wall of the small tape cartridge 2. A swinging member 57 having a structure is suspended and supported on the adapter main body 16 side via an upper horizontal support shaft 63 so as to be swingable in the front and rear directions, and as the swinging member 57 swings, the contact terminal 6
A slide member 56 that is pressed and displaced back and forth by approximately the same amount as the displacement amount of 4 is also installed in the adapter body 16, and when the accidental erasure prevention piece of the small tape cartridge 2 is broken off as shown in the figure, the slide member 56 The member 56 is retracted inward by the helical spring 60, and the rear end surface 56a is connected to the rear wall 54 of the adapter body 16.
When the erasing is enabled by retreating from the window 53 formed in the window 53 and the accidental erasure prevention piece is not broken off, the swinging arm 57 is pushed backward by the contact between the accidental erasure prevention piece and the contact terminal 64. Along with this, the slide member 56 is also displaced rearward, so that the rear end surface 56a faces the window 54 to prevent erroneous erasure.

When this was done, the initial objective was well achieved, but the installation position of the accidental erasure prevention piece on the small tape cartridge 2 and the installation position of the accidental erasure prevention piece on the adapter body 16 tend to be relatively largely deviated in the lateral direction. Therefore, the force acting on the contact terminal 64 and the slide member pressing reaction force acting on the tip of the swing member 57 force the swing member 57 against the upper support shaft 63, and the support shaft 63 If play occurs in the portion, there is a risk that the writhing will become even larger and the swinging member 57 will not be able to swing smoothly.

This invention aims to eliminate such problems.

Hereinafter, embodiments of this invention will be described based on the drawings. The illustrated adapter 1 is designed to allow a small-sized video tape cartridge 2 to be loaded into a video deck for a normal large-sized tape cartridge.

In FIGS. 1 and 2, the small tape cartridge 2 functions independently, and has a main body case formed by connecting upper and lower plastic cases 3a and 3b together with tapping screws or the like. Tape reels 5 and 6 with flanges on both sides, on which the tape 4 is wound, are rotatably attached to the left and right inside of 3.
There are tape guide members 7 on the left and right front of the main body case 3.
7 is arranged, and when viewed from the rear side, the tape 4 is led out from the left delivery reel 5 to the front of the case and wound onto the right take-up reel 6. however,
The tape reel 5 on the output side is installed on a transparent drive shaft insertion hole in the bottom wall of the case to allow a certain amount of free movement in the radial direction, and the tape reel 6 on the take-up side is fixed in position around a vertical fixed shaft 9. It is supported in a shape and rotates,
A gear portion 11 formed on the outer periphery of the lower flange 10
is exposed laterally outwardly through a notch 13 formed across the bottom wall and right side wall 12 of the main body case 3.

The main body case 3 is provided with a front cover 15 for closing the front side of the main body case 3 and protecting the tape 4 when not in use. This front cover 15 is a spring member (not shown), and when it is in the closed position with the dead center at the opening angle of 70 degrees from each opening/closing direction, it can be closed freely, and when it is in the upward open position at 90 degrees forward, it can be opened. is maintained.

In Figures 1 and 2, the proposed adapter 1
At least, the external shape of the adapter body 16 is formed to substantially the same specifications as a large tape cartridge, so-called VHS type tape cartridge, and there is no problem when loading it into a magnetic recording device for VHS type tape cartridges. A magnetic recording device is activated.

That is, the adapter main body 16 is formed by connecting upper and lower plastic cases 16a and 16b with their lids together using tapping screws, etc., and has insertion holes 19 and 2 on the left and right sides of the bottom wall 17 into which the drive shaft of the magnetic recording device is inserted.
0 is transparently provided, and a front cover 21 that closes the front surface of the adapter body 16 is pivotally attached to the adapter body 16 so as to be rotatable in opening and closing, and is always biased to rotate in a closed position by a spring member (not shown).

A storage chamber 22 with an open top is defined at the left side of the adapter body 16 in the figure, and a small tape cartridge 2 is stored in this storage chamber 22 so as to be freely inserted and removed from above. Guide ribs 24 are provided on the inner wall surfaces of the left and right side walls 23 of the storage chamber 22 at rearward positions.
are respectively protruding upward, and the front and back sides of the small tape cartridge 2 are connected to the adapter body 16.
The small tape cartridge 2 is inserted into the storage chamber 22 from above, and a vertical groove 25 is formed in the rearward outer surface of the left and right side walls 12 of the small tape cartridge 2 so that the guide rib 2
4, the small tape cartridge 2 is received and supported by the left and right horizontal side walls 23 and positioned in the left and right direction.
5 and the guide rib 24, positioning in the front-back direction is performed. Therefore, the tape reel 5 on the output side of the small tape cartridge 2 stored in the storage chamber 22 is concentrically aligned with the drive shaft insertion hole 19 of the adapter body 16.

The upper surface of the opening of the storage chamber 22 is opened and closed by an opening/closing lid 26. When the opening/closing lid 26 is in the closed state, the protruding side pieces 27 on the left and right sides of the front end are attached to the pivot shafts 29 and 2.
9 as a fulcrum, so as to be able to swing open and close, and is rotatably biased to the open position by a helical spring 30 fitted to one of the pivots 29. In addition, leaf springs 31 are fixed near the left and right ends of the inner surface of the opening/closing lid 26, and when the small tape cartridge 2 is stored in the storage chamber 22 and the opening/closing lid 26 is closed, the leaf springs 31
31 elastically presses and supports the upper surface of the small tape cartridge 2.

When using the present adapter 1, the small tape cartridge 2 must be stored in the storage chamber 22, and then the front cover 15 must be opened so that the tape 4 can be pulled out.

Therefore, in the illustrated example, the engaging element 32 extends from the vicinity of one pivot joint of the opening/closing lid 26 to the front of the pivot shaft 29 when the opening/closing lid 26 is closed, and when the opening/closing lid 26 is open, the small tape car When the cartridge 2 is inserted into the storage chamber 22, as shown in FIG.
The engaging claw 32 of the extending end of the engaging element 32 is inserted into the vertical gap 33 formed between the stepped surface and the front cover 15.
A shall intervene. In such a case, when the opening/closing lid 26 is closed against the upper surface of the storage chamber 22 against the helical spring 30, the front lid 15 will automatically close the engaging element 3.
It is lifted upward by the engaging claw 32a of No. 2, and the
When the opening angle of 70 degrees is exceeded, the front lid 15 assumes an open position by itself, and when the opening/closing lid 15 is closed, the engaging claw 32a serves as a support and absorbs the external force applied by a finger or the like to the front lid 15. The front lid 15 is maintained in an open position.

Next, when removing the small tape cartridge 2 from the storage chamber 22, the front edge 26a of the opening/closing lid 26 is removed.
comes into contact with the front lid 15 and presses the front lid 15 downward, and the front lid 16 is automatically closed.

The opening/closing lid 26, which is biased to the open position by the helical spring 30, is locked so as not to open in the closed state.

In the illustrated example, locking protrusions 35 are provided on the left and right front ends of the inner surface of the opening/closing lid 26, and a sliding knob 36 is provided on the upper case 16a of the adapter body 16, and the knob 36 is slid left and right. A lock plate (not shown) that engages and disengages from the locking protrusions 35 and 35 is operated.

When the small tape cartridge 2 is stored in the storage chamber 22 of the present adapter 1 and the opening/closing lid 26 is closed, the front cover 15 of the small tape cartridge 2 is set in the open state, but the adapter 1 cannot be used for magnetic recording. Prior to loading into the apparatus, the tape 4 is pulled out from the small tape cartridge 2 to the front of the adapter body 16 to create a tape set condition similar to that in a standard large tape cartridge.

The outline of the tape pull-out mechanism will be explained next. FIG. 4 shows the state immediately after the small tape cartridge 2 is stored in the adapter main body 16. At this stage, the tape 4 built into the small tape cartridge 2 is Front left and right tape guide members 7.
It is spread over 7 rooms.

Inside the adapter body 16, round pin-shaped tape pull-out members 37 and 38 are waiting in a vertical position on the front left and right sides of the storage chamber 22, and when the small tape cartridge 2 is inserted into the storage chamber 22 from above, The tape pull-out members 37 and 38 relatively enter the recesses 8 and 8 at the front end of the small tape cartridge 2 from below and enter the inside of the tape 4 stretched between the tape guide members 7 and 7.

The tape drawer member 37 on the left side is erected at the tip of a tape drawer arm 40 that swings horizontally around a fixed fulcrum 39, and the tape drawer member 38 on the right side is attached to another tape provided in the right lateral space within the adapter body 16. It is erected at the tip of the drawer arm 41.
These two arms 40 and 41 are interlocked with each other to left and right link mechanisms 42 and 43, and a manual operation lever 45 is used to operate these link mechanisms 42 and 43.
The slit 4 formed on the rear surface of the adapter body 16
6, and a knob 47 is fixed to the tip thereof.

Therefore, as shown in FIG. 4, when the small tape cartridge 2 is loaded, the operating lever 4 is
5 clockwise, one tape drawer arm 40 swings horizontally via the left side link mechanism 42, pulls out the tape 4 locked by the tape drawer member 37 to the front left, and also pulls out the other tape. The drawer arm 41 dually changes its posture on a plane by the right link mechanism 43, and the tape drawer member 3
As shown in the figure, 8 draws an intermediate curved locus P that has a large curvature at the beginning and a small curvature at the latter half. When each tape pull-out arm 40, 41 reaches the end of its movement, each tape pull-out member 3
7 and 38 are inserted and supported by receiving members 48 and 49 which are arranged and fixed on the left and right sides of the front part of the adapter main body 16, and are positioned and fixed.

As mentioned above, the left and right tape drawer members 37 and
38 to the diagonally forward movement limit and fixed, the positions correspond to the original positions of the front left and right tape guide members in a standard large tape cartridge, and the tape 4 is moved to the left and right tape drawers. It is stretched across members 37 and 38. When the adapter 1 is loaded into the magnetic recording device from this state, the front cover 21 of the adapter body 16
is opened and the tape 4 is pulled out toward the front rotary head by the tape loading pin on the magnetic recording device side.

In this way, when the adapter main body 16 is loaded into the magnetic recording device, the drive shaft insertion hole 20 on the winding side
The rotation of the drive shaft that has entered the adapter body 16 is transmitted to the take-up side tape reel 6 of the small tape cartridge 2 via a gear transmission mechanism installed in the right lateral space inside the adapter body 16.
can be transmitted to the lower flange 10 of.

Furthermore, when the adapter body 16 is removed from the magnetic recording device after use and the operating lever 45 is swung counterclockwise to return it to its original position, the left and right tape drawer arms 40 and 41 will return to their original positions. However, only when the lever 45 returns, the lever 45 and the internal gear transmission mechanism are linked, and the take-up tape reel 6 is rotated clockwise, whereby the drawn tape 4 is rotated. It can be wound without slack.

In order to prevent the built-in tape 4 from being accidentally erased, the small tape cartridge 2 has a removable erroneous erasure prevention piece 52 located on the rear wall 51 at a position near the left end in the figure.
When the small tape cartridge 2 is stored in the storage chamber 22, the accidental erasure prevention piece 52
The external shape of the adapter body 16 indicates whether or not the adapter body 16 is broken off.

The present invention is characterized by this point,
On the rear wall 54 of the adapter main body 16, a window 53 is provided through the inside and outside at the place where the accidental erasure prevention piece in a standard large (VHS type) tape cartridge should normally be located, that is, near the left end in the figure. A detection member 55 for detecting the presence or absence of the accidental erasure prevention piece 52 in the cartridge 2 and displaying it on the window 53 is incorporated into the adapter body 16.

5 to 7, the detection member 55 consists of a slide member 56 and a swing arm 57. As shown in FIGS.
The slide member 56 includes left and right rib-shaped guides 5 protruding from the inner surface of the lower case 16b of the adapter body 16.
The lower case 1
The limit of forward and backward movement is regulated by a stopper 61 erected on the inner surface of the window 6b facing the window 53. This stopper 61 also prevents dust from entering the interior through the window 53.

The swinging arm 57 has a base end (right end in the figure) supported by a vertical support shaft 63 supported by the upper and lower cases 16a and 16b.
The support shaft 6
The free end portion is biased to swing forward by a helical spring 60 fitted to the portion 3. This swing arm 57
A contact terminal 64 is integrally protruded from the front edge of the middle part in the longitudinal direction of the tape cartridge 2, and this contact terminal 64 is located inside the storage chamber 22.
It is facing the position of No. 2 from behind. Further, a pin 65 is provided protruding from the lower surface of the free end of the swing arm 57, and this pin 65 engages in a rectangular hole 62 formed in the front part of the slide member 56 with appropriate flexibility in the front and rear direction. . The upward floating of the slide member 56 is restricted by a rib 67 on the upper case 16a side.

Now, when the accidental erasure prevention piece 52 of the small tape cartridge 2 is broken off, as shown in FIG. 6, the contact terminal 64 of the swinging arm 57 is broken off. recess 66
, the slide member 56 interlocked with the swing arm 57 retracts completely, and the adapter body 16
The window 53 is in a folded state without the erroneous erasure prevention piece.

Erase prevention piece 52 on small tape cartridge 2
exists, as shown in FIG. 7, the contact terminal 64 comes into contact with the accidental erasure prevention piece 52 and is pushed back, causing the slide member 56 to move backward against the spring 60. The slide member 56 is forcibly moved so that the rear end surface 56a of the slide member 56 extends into the window 53 and becomes substantially flush with the outer surface of the rear wall 54 of the adapter body 16.

In other words, the slide member 56 is the adapter body 16,
In other words, it functions as a piece to prevent accidental erasure of a large tape cartridge. Therefore, when the adapter 1 is loaded into the magnetic recording device, if the rear end surface 56a of the slide member 56 extends into the window 53 and the detector on the magnetic recording device side comes into contact with the rear end surface 56a, the small tape car It is detected that the tape 4 built into the storage unit 2 is correctly in a state where it can be erased by mistake. Also, if the rear end surface 56a of the slide member 56 is retracted into the adapter body 16 and the detector on the magnetic recording device side hits the slide member 56, the tape 4 of the small tape cartridge 2 may be erased incorrectly. Detects the prevention state.

The reason why the pin 65 at the free end of the swinging arm 57 and the slide member 56 are engaged with each other through appropriate flexibility in the front and back direction is based on the amount of longitudinal displacement of the free end of the swing arm 57. This is because the necessary sliding amount of the slide member 56 is small, and the means for forming this flexibility can be modified in various ways. For example, the slide member 5
A pin is set up on the 6 side, and the free end of the swing arm 57 is
A long hole in the front-rear direction may be formed to engage this pin. a swinging arm 57 having a contact terminal 64;
The intermediate swinging arms, which are pin-engaged with the slide member 56 without longitudinal flexibility, are respectively fitted and pivoted on the vertical support shafts 63, and both swinging arms are engaged with slotted pins with a predetermined relative swing flexibility. Alternatively, it can also be implemented in a form in which the parts are brought into contact with each other. However, slide member 5
6 only needs to restrict the protruding position facing the window 53, so it is not necessarily necessary to provide the above-mentioned flexibility.
If there is sufficient sliding space, it may be possible to remove the flexibility and make it move back significantly.

In addition, in the illustrated example, the window 53 is provided at a position corresponding to the location of the accidental erasure prevention piece in the VHS type tape cartridge, but the location of the window 53 provided in the adapter body 16 may vary depending on the model of the large tape cartridge. can be freely changed, such as being provided on the left and right side walls 68.

Furthermore, the detector on the magnetic recording device side may be one that optically detects whether the slide member 56 faces the window 53 or not.

As explained above, according to this invention, the force acting on the contact terminal 64 due to contact with the accidental erasure prevention piece 52 of the small tape cartridge 2 and the reaction force pressing the slide member 56 are vertically Even if the radius of action on the support shaft 63 differs greatly, the upper and lower levels do not change greatly. Therefore, there is almost no twisting on the vertical support shaft 63, and the swing arm 57 can be operated smoothly to ensure the desired function.

[Brief description of the drawings]

Figure 1 is a perspective view of the adapter and small tape cartridge viewed from the rear, Figure 2 is a perspective view of them viewed from the front, and Figure 3 is the operation of the opening/closing lid that closes the adapter storage chamber. It is a partially cutaway side view for explaining. FIG. 4 is a partially cutaway plan view of the adapter. 5 to 7 illustrate the accidental erasure prevention means according to the present invention, in which FIG. 5 is a perspective view, FIG. 6 is a vertical side view without the accidental erasure prevention piece, and FIG. FIG. 6 is a longitudinal sectional side view in a state where there is an erroneous erasure prevention piece. FIG. 8 is a perspective view illustrating a conventional erroneous erasure prevention means. 1...Adapter, 2...Small tape cartridge, 16...Adapter body, 22...Storage chamber, 5
1... Rear wall of small tape cartridge, 52...
... Erroneous erasure prevention piece, 53 ... Window provided on the adapter body, 54 ... Rear side wall of the adapter main body, 55 ...
Detection member, 56... Slide member, 56a... Rear end surface of slide member, 57... Swing arm, 59
... Guide, 60 ... Spring, 63 ... Vertical support shaft, 6
4...Contact terminal.

Claims (1)

[Claims for Utility Model Registration] (1) A small-sized tape cartridge 2 having an adapter body 16 having substantially the same external shape as a large-sized tape cartridge, and an accidental erasure prevention piece 52 that can be broken off on the outer wall. In the adapter for the small tape cartridge, which is configured such that the tape 4 is removably stored in the small tape cartridge 2 and can be pulled out from the small tape cartridge 2 to the front side of the adapter main body 16, a window 5 is provided at one location on the outer wall of the adapter main body 16.
A detection member 55 is installed in the adapter body 16 to detect whether or not the small tape cartridge 2 has an erroneous erasure prevention piece 52. It has a contact terminal 64 that comes into contact with the accidental erasure prevention piece 52 of the small tape cartridge 2, and has a vertical support shaft 6 at one end.
A swinging arm 57 that swings horizontally back and forth via 3
and a slide member 56 that is displaced from a position facing the window 53 to a position retracted from the window 53 in conjunction with the horizontal swing of the arm 57 at a position offset in the longitudinal direction of the arm with respect to the contact terminal 64. A small tape cartridge adapter characterized by comprising: (2) The slide member 56 is offset toward the free end side of the swing arm 57 with respect to the contact terminal 64, and the swing arm 57 and the slide member 56 have an appropriate length flexibility in the sliding direction. The adapter according to claim 1 of the claimed utility model registration, which is interlocked and connected.