JPH02276075A - Adapter for small tape cartridge - Google Patents

Abstract

PURPOSE:To prevent the unnecessary upward open state of an open/close cover, and to improve convenience by providing a close cover locking mechanism, which holds the closed posture of the open/close cover, on an adapter main body. CONSTITUTION:An open/close cover 35 is upward opened, a small tape cartridge 2 is guided and stored from an upper part to a housing 25, and then the open/ close cover 35 is closed to the top face of the aperture of the housing 25. Next when an operation knob 45 is slid in one of the right or left directions, a member that moves unitedly with the operation knob 45 is abutted and engaged with an engaged part 44 on the open/close cover 35 side, and the open/close cover 35 is closed and locked so as not to be upward opened. On the contrary, when the operation knob 45 is slide in the other left or right direction, the locked state is canceled, and the open/close cover 35 can be upward opened. Thus since the same posture of the open/close cover 35 can be continuously maintained, the open/close cover 35 is prevented from being unnecessarily upward opened, rocked, or ratting.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small tape cartridge adapter that allows a small tape cartridge to be loaded onto a large tape cartridge deck.

This type of adapter has already been proposed, in which a small tape cartridge is stored in a storage chamber provided on either side of the left or right side of the adapter body, which has substantially the same external shape as a large tape cartridge, and then the small tape cartridge is inserted into the adapter body. Use the left and right tape guide members loaded inside to pull out the built-in tape from the small tape cartridge to the front of the adapter body, and the state of the tape wrapping inside the adapter body is essentially the same as that of a large tape cartridge. be identical. After that, the adapter body is loaded onto the deck.

In this type of adapter, the problem of the present invention is how to determine the movement trajectory of the tape drawing member when drawing the tape from the small tape cartridge forward into the adapter body. In other words, the tape pull-out member is moved from its original retracted position to the diagonally forward pull-out position, but in a configuration in which a small tape cartridge is stored near one side of the left and right side of the adapter body, the left and right tape guides The amount of movement of one of the members in the horizontal direction is much greater than the amount of movement forward. In that case, if the movement locus of the tape guide member is an arc with a large radius of curvature, the tape pull-out member will protrude forward of the adapter body during movement. This is undesirable as it may cause damage to the tape. When a video tape cartridge is used, a front cover is attached to the front of the adapter body, but if the front cover remains closed, the tape drawer member will come into contact with the front cover. Since this type of front cover must be opened after the adapter body is loaded onto the deck, it must be able to move so that the tape drawer does not hit the front cover when the front cover is closed.

This invention was proposed in response to such demands.

Embodiments of the present invention will be described below 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.

(1) Structure of a small tape cartridge In Figs. 1 and 2, the small tape cartridge 2 functions independently, and the upper and lower plastic cases 3a and 3b are connected by tapping screws. Tape reels 5 and 6 with flanges on which the tape 4 is wound are rotatably mounted on the left and right sides of the main body case 3, which is connected with the main body case 3, and tape guide members 7 and 7 are arranged on the front left and right sides of the main body case 3, When viewed from the rear side, it is assumed that the tape 4 is led out from the left feed reel 5 to the front of the case and taken up on the right take-up reel 6.

However, the tape reel 5 on the feeding side is mounted on a drive shaft insertion hole formed 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 winding side is supported by a vertical fixed shaft 9. rotates around the fixed shaft 9, and the lower flange 10
A gear portion 11 formed on the outer periphery of the main body case 3 is exposed laterally outwardly through a notch 13 formed across the bottom wall and the right side wall 12 of the main body case 3. In FIG. 1, a transparent window 15 is formed on the left side of the upper case 3a for visually checking the amount of tape wound on the tape reel 5 on the feeding side from the outside.

The main body case 3 is provided with a front cover 16 for closing the front side of the main body case 3 and protecting the tape 4 when not in use. This front cover 16 has connecting pieces 18 and 18 at both left and right ends of the front plate 17.
is extended rearward, and both connecting pieces 18, 18 are externally fitted into the front end recessed portions of the left and right side walls 12, 12 of the main body case 3, are rotatably supported by pins, and are attached to the right side wall 12. A U-shaped spring member 19 holds the front lid 16 in the closed position with the opening angle of about 45° as the dead center, and in the open position when it is in the upward open position of 90° forward. .

(2) Basic structure of the adapter In FIGS. 1 and 2, the present adapter 1 has at least an adapter main body 20 having substantially the same external shape as a large tape cartridge, the so-called VH3 type tape cartridge, and a VH3 type tape cartridge. When loaded into a deck for a type tape cartridge, the deck operates without any trouble.

That is, the adapter main body 20 is made up of upper and lower plastic cases 20a and 20b that are joined together with tapping screws, etc., and insertion holes 22 and 23 for receiving the drive shafts on the deck side are transparently formed on the left and right sides of the bottom wall 21 of the adapter body 20. has been done. A front cover 24 that closes the front side of the adapter body 20 is pivotally attached to the adapter body 20 so as to be rotatable to open and close, and is always biased to rotate in the closed position by a spring member (not shown), and has a locking mechanism for holding the adapter body in the closed position. It is equipped with

Since these configurations have the same specifications as the standard VH3 type tape cartridge, details will be omitted. However, the internal structure of the adapter body 20 is different from that of a standard large tape cartridge, and there is no tape reel.
The front side of 0 is open.

=6= (3) Storage chamber of adapter A storage chamber 25 whose top surface is open is defined at the left side of the adapter body 20 in FIG. 1, and the small tape cartridge 2 is inserted into this storage chamber 25 from above. It is stored so that it can be inserted and removed freely.

In FIGS. 3 to 5, the left and right side walls 2 of the storage chamber 25
The inner wall surface of No. 6 has a stepped surface 27 with wide left and right widths at the top, an inclined guide surface 28 that slopes downward from the stepped surface 27, and a vertical guide surface 28 that is continuous with the inclined guide surface 28 and reaches the bottom wall 21. It is formed into a cross-sectional shape having a surface 29. The height of the stepped surface 27 is set lower than the upper end of the small tape cartridge 2 when stored in the storage chamber 25, and the height of the stepped surface 27 is set lower than the upper end of the small tape cartridge 2 when stored in the storage chamber 25. A gap g sufficient for a fingertip to enter is formed between the tape cartridge 2 and the tape cartridge 2. Guide ribs 32 extending from the bottom wall 21 to the height of the stepped surface 27 are provided at rearward positions on the inner wall surfaces of the left and right side walls 26, respectively.

In such a case, insert the small tape cartridge 2 from above into the storage chamber 25 with its front and back orientation aligned with that of the adapter body 20, and cut the vertical grooves 33 in the rearward outer surface of the left and right side walls 12 of the small tape cartridge 2. The guide rib 32
guide and fit into each other. When the small tape cartridge 2 is stored in the storage chamber 25, the left and right side walls 12 of the small tape cartridge 2 are supported by the vertical surface 29 to position the small tape cartridge 2 in the left and right direction. Positioning in the front-rear direction is achieved by fitting with. Therefore, the tape reel 5 on the feeding side of the small tape cartridge 2 stored in the storage chamber 25 is concentrically aligned with the drive shaft insertion hole 22 of the adapter body 20.

In addition, the inner wall surface of the left and right side walls 26 of the storage chamber 25 has a stepped surface 27 and an inclined guide surface 28 at the upper end to form a finger insertion gap g, so that the small tape cartridge 2 can be inserted as shown in FIG. It can be smoothly stored into the storage chamber 25 while being guided by the inclined guide surface 28.

In particular, the small tape cartridge 2 is stored with its top surface one level lower than the top surface 30 of the adapter body 20, but the small tape cartridge 2 can be easily picked out from the storage chamber 25 by inserting a fingertip into the gap g.

(4) Storage chamber opening/closing lid In FIGS. 2, 3, and 8, the opening top surface of the storage chamber 25 is opened and closed with an opening/closing lid 35.

The opening/closing lid 35 has protruding side pieces 36 on the left and right front ends in the closed state.
・36 is pivotally connected to the pivots 37, 37 so as to be able to swing open and close, and a helical spring 38 is fitted to one of the pivots 37.
As shown in Fig. 8, by bringing the left and right projecting side pieces 36 into contact with the upper edge of the opening at the front end of the storage chamber 25, the maximum opening angle is approximately 115 degrees. regulated.

The inner surface of the opening/closing lid 35 is provided with reinforcing ribs 39, 39 extending in the front-rear direction at the left and right ends, as shown in FIG. When the opening/closing lid 35 is closed on the upper surface of the storage chamber 25, the lower end surfaces of the reinforcing ribs 39, 39 are supported by the stepped surfaces 27, 27.

Leaf springs 40 are fixed near the left and right ends of the inner surface of the opening/closing lid 35, and a small tape cartridge 2 is installed in the storage chamber 25.
When the opening/closing lid 35 is closed with the leaf springs 40 and 4
0, the upper surface of the small tape cartridge 2 is elastically pressed and supported. This pressing point is located on a line connecting the centers of both tape reels 5 and 6 of the small tape cartridge 2, and prevents rattling during rotation of each tape reel 5 and 6.

The top surface of the opening/closing lid 35 is connected to the adapter body 20 in the closed state.
It becomes flush with the upper surface 30 of. Therefore, when the adapter 1 is pushed into the deck in a horizontal position and loaded, the adapter body 20
The reference plane on the lower surface (usually four corners) is supported by the deck side, and correspondingly, several parts of the upper surface 30 of the adapter body 20, including the upper surface of the opening/closing lid 35, are supported by members on the deck side. This prevents the adapter body 20 from wobbling.

In FIG. 1, a transparent window 41 for visually checking the tape winding amount is provided at the left end of the opening/closing part 1i35, corresponding to the transparent window 15.
is formed. The opening/closing 1ii35 itself may be transparent.

(5) Opening/closing mechanism for front cover of small tape cartridge When using the present adapter 1, after storing the small tape cartridge 2 in the storage chamber 25, the front cover 16 must be opened so that the tape 4 can be pulled out.

Therefore, in the illustrated example, an engager 42 made of a plate spring is provided near the pivot joint on one side (on the right side in FIG. 1) of the opening/closing lid 35 and extends forward of the pivot shaft 37 when the opening/closing lid 35 is in the closed state. It will be set up as follows. When the small tape cartridge 2 is inserted into the storage chamber 25 with the opening/closing lid 35 open, a gap is formed between the stepped surface of the right side wall 12 of the small tape cartridge 2 and the front lid 16, as shown in FIG. The engaging claw 42a of the extending end of the retainer 42 is inserted into the vertical gap 43.
shall intervene.

In this case, when the opening/closing lid 35 is closed against the upper surface of the storage chamber 25 against the helical spring 38, the front lid 16 is automatically moved against the spring member 19 by the engaging claw 42a of the engaging element 42. When the opening angle exceeds approximately 450°, the front M16 automatically assumes the opening position due to the spring member 19, and the opening/closing lid 35
When the front cover 1 is closed, the engaging claw 42a serves as a support for the front cover 1.
It absorbs the external force applied by fingers etc. to 6 and maintains the front i16 in an open position.

Next, when removing the small tape cartridge 2 from the storage chamber 25, the front edge 35a of the opening/closing lid 35 contacts the front lid 1G and presses the front M16 downward as shown in FIG. Closed automatically.

(6) Closing lid locking mechanism for opening/closing lid Opening/closing lid 3 swing-biased to open position by helical spring 38
5 must be locked so that it does not open when closed.

Therefore, as shown in FIG. 1, L-shaped locking protrusions 44 are provided protrudingly on the left and right sides of the front end of the inner surface of the opening/closing lid 35. On the other hand, the upper case 20a of the adapter body 20 is provided with a sliding knob 45 that extends onto the upper surface 30, and is
As shown in the drawings and FIG. 6, lock pieces 47 are provided on a lock plate 46 that slides from side to side integrally with the knob 45.

Thus, when the opening/closing lid 35 is closed and the knob 46 is slid, the locking pieces 47 engage the respective locking protrusions 44, 44, thereby locking the opening/closing lid 35 in the closed position. I made it. When the knob 45 is slid in the left and right opposite directions, the opening/closing lid 35 is unlocked and automatically opened.

The engagement surfaces of each of the engaging protrusions 44 and each of the locking pieces 47 are formed into tapered surfaces in order to maintain the opening/closing lid 35 to close easily without wobbling against the pressing force of the leaf spring 40. In addition, the lock plate 46 is moved into the locked position and the unlocked position by a pair of elastically deformable locking arms 48, 48 that will be connected from now on, and a stopper 49 provided on the inner surface of the upper case 20a, which comes into contact with and crosses over. Each is retained.

(7) Mechanism for preventing accidental erasure of tape built into the small tape cartridge The small tape cartridge 2 has a built-in tape 4 that can be folded off at a position near the left end in the figure on the rear wall 51 in order to prevent accidental erasure of the tape 4 built into it. A prevention piece 52 is provided. Therefore, even when the small tape cartridge 2 is stored in the storage chamber 25, it is desirable that the outer shape of the adapter body 20 indicate whether or not the erroneous erasure prevention piece 52 is broken off.

Therefore, on the rear wall 53 of the adapter main body 20, the accidental erasure prevention piece in a standard large (VH3 type) tape cartridge is located where it should be, that is, at a position near the left end in the figure.
A detecting member 55 is installed in the adapter main body 20 so as to penetrate through the inside and outside of the adapter body 20, and detects the presence of the erroneous erasure prevention piece 52 of the small tape cartridge 2 and displays it on the window 54.

In FIGS. 10 to 14, the detection member 55 consists of a slide member 56 and a swing member 57.

The slide member 56 is attached to the lower case 20 of the adapter body 20.
It consists of a helical spring supported on the lower case 20b side. The spring member 60 urges the guide 59 in the direction of retraction into the adapter main body 2o.
The limit of retraction is regulated by stoppers 61, 61 connected from 59. Note that the stopper 61 is a spring member 60
The spring member 60 also serves as a receiver and prevents the slide member 56 from rising. The slide member 56 connects the lower case 2 with protrusions 62, 62 that protrude from the left and right sides of the lower surface and run forward and backward.
It is brought into contact with the inner surface of 0b to reduce sliding resistance. This protrusion 62 may be provided on the lower case 20b side.

The upper end of the swinging member 57 connects to the adapter body 2 via the support shaft 63.
0 is suspended and supported on the inner surface of the upper case 20a, and the support shaft 6
3 as a fulcrum, and a contact terminal 64 protruding from the front side of the lower part faces the position of the erroneous erasure prevention piece 52 of the small tape cartridge 2 in the storage chamber 25 from the rear.

An operating arm 65 is cantilevered in the lateral direction from the swinging member 57 and comes into contact with the rear end of the slide member 56 . Note that the support shaft 63 of the swinging member 57 is supported by a plate member 58 that stands up from the case bottom wall 21.

Assume now that the erroneous erasure prevention piece 52 of the small tape cartridge 2 has been broken off. At that time, the contact terminal 64 of the swinging member 57 engages in the recess 66 for breaking off the accidental erasure prevention piece of the small tape cartridge 2, so that the slide member 56 interlocked with the swinging member 57 via the operating arm 65 The window 54 of the adapter main body 20 is in a folded-off state in which there is no erroneous erasure prevention piece.

When the small-sized tape cartridge 2 has the accidental erasure prevention piece 52, the contact terminal 64 comes into contact with the accidental erasure prevention piece 52 and is pushed back to the rear side, so that the slide member 56
is corrected rearward against the spring member 60, and the rear end surface 56a of the slide member 56 extends into the window 54 and becomes substantially flush with the outer surface of the rear wall 53 of the adapter body 20.

In other words, the slide member 56 functions as a piece for preventing accidental erasure of the adapter body 20, in other words, a large tape cartridge. Therefore, when adapter 1 is loaded on the deck,
When the rear end surface 56a of the slide member 56 faces the window 54 and the detector on the deck side comes into contact with the rear end surface 56a, it is detected that the tape 4 built into the small tape cartridge 2 is correctly in a state where it can be erased by mistake. do. Slide member 56
When the rear end surface 56a is retracted into the adapter body 20 and the deck side detector hits the slide member 56, it is detected that the tape 4 of the small tape cartridge 2 is correctly in the state of preventing accidental erasure. .

Note that the front end upper surface 64. of the contact terminal 64. a is formed into a recessed circular arc surface so that when the small tape cartridge 2 is inserted into the storage chamber 25 from above, the swinging member 57 that comes into contact with the lower edge of the rear end of the small tape cartridge 2 is pushed back without twisting. Also, the front and rear lower surfaces 64 of the contact terminal 64
b is formed in a convex arc shape with a smaller curvature than the curvature of the upper surface 64a so that the swinging member 64 can be pushed back smoothly when the small tape cartridge 2 is taken out from the storage chamber 25.

(8) Mechanism for drawing out the tape from the small tape cartridge to the front of the adapter body As already mentioned, when the small tape cartridge 2 is stored in the storage chamber 25 of the present adapter 1 and the opening/closing lid 35 is closed,
The front lid 16 of the small tape cartridge 2 is set in an open state, but before loading the adapter 1 onto the deck, the tape 4 is pulled out from the small tape cartridge 2 to the front of the adapter body 2o, and the tape 4 is pulled out from the small tape cartridge 2 to the front of the adapter body 2o. Similar tape wrappings must be kept in good condition.

Next, to explain the tape pull-out mechanism for this purpose, FIG.
The tape 4 contained in the small tape cartridge 2 is stretched between the front left and right tape guide members 7 at this stage.

Inside the adapter body 20, round pin-shaped tape pull-out members 7o and 71 are waiting in a vertical position on the front left and right sides of the storage chamber 25, and when the small tape cartridge 2 is inserted into the storage chamber 25 from above, The tape pull-out members 70 and 71 relatively enter the recesses 72 and 73 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 left tape drawer member 70 is erected and fixed at the tip of a tape drawer arm 76 that swings horizontally about a fixed fulcrum 75 at the base end. As shown in FIGS. 7 and 8, the small tape cartridge 2 has a lower surface of the bottom wall of the case that is recessed across the left and right width directions at the front part.
The lowered end of the tape pull-out arm 76 fits between the case bottom wall 21 of the adapter body 20 and the case bottom wall of the small tape cartridge 2.

This tape pull-out arm 76 is connected to a slide link 79 that slides in the left-right direction via a link 77 and a relay link 78. A bell crank 81 that is horizontally swingable around a support shaft 80 fixed to the inner surface of the upper case 20a is supported in the right lateral space within the adapter body 20, and a slide link 79 is provided on the short side of the bell crank 81. The proximal end of (
(right end in Fig. 15) are connected by engagement with the elongated hole and the pin.

Also, in the space on the right side of the adapter body 20, there is an upper case 20.
A horizontal cam plate 82 along the inner surface of a is fixed. This cam plate 82 has two rows of curved elongated holes 84 and 85 with different centers of curvature running in the front and rear directions, and pins 86' and 87 that pass through each of the elongated holes 84 and 85 as shown in FIG. Slide links 88 and 89 are integrally connected to each other on the upper and lower sides of the cam plate 82, and the upper slide link 88 and the tip of the long side of the bell crank 81 are connected by a link 90. On the other hand, a pin 91 provided on the lower slide link 89
Another tape pull-out arm 93 is connected to the tape pull-out arm 93 through a dogleg-shaped long hole 92, and the right tape pull-out member 71 is vertically erected at the vertical end of this arm 93. A tension spring 94 is mounted across the arm 93 and the lower slide link 89 to bias the tape pull-out arm 93 toward the lower slide link 89. In addition, a vertical slide link 88 is provided on the side edge of the tape drawer arm 93.
- A notch 95 is provided that engages from the side with one pin 86 that connects 89.

A manual operation lever 96 is attached to the support shaft 80 of the bell crank 81.
The lever 96 and the bell crank 81 are flexibly connected to each other by engagement with an elongated hole 97 and a pin 98 to allow relative rotation within a certain small angle. A tension spring 99 is installed between the bell crank 81 and the lever 96 to urge them toward each other.

The tip of the operating lever 96 is connected to the rear wall 53 of the adapter body 20 through a left and right horizontally elongated slit 100 formed in the joint surfaces of the upper and lower cases 20a and 20b that constitute the adapter body 20.
It protrudes outward, and a knob 101 is fixed to the protruding end.

A knob storage notch 102 is formed on the outer surface of the rear wall 53 of the adapter body 20 at approximately the center in the left-right direction.
A notch 104 for housing a knob that straddles the virtual ridge line between the rear wall 53 and the right side wall 103 at the rear right corner of the adapter body 20
are formed, and the knob 101 is accommodated in the notches 102 and 104, respectively, at the swing end of the operating lever 96.

On the other hand, since the notch 104 is open at the corner across the rear wall 53 and the right side wall 103, the knob 10 is opened especially when the operating lever 96 is swung from the cloth to the left in the figure.
You can easily hook your fingertips onto 1 from the right side.

Next, to explain its operation, in the state before the tape is pulled out from the small tape cartridge 2 stored in the adapter main body 20, as shown in FIG. are located at the front ends of the curved elongated holes 84 and 85, respectively. If the operating lever 96 is rotated clockwise from this state,
As shown in FIG. 16, the bell crank 81 rotates in the same direction, the slide link 79 moves to the left, and the left tape pull-out arm 76 moves horizontally counterclockwise around the support shaft 75. The tape 4 is first pulled out forward by the left tape pull-out member 70.

As the bell crank 81 rotates clockwise, the vertical slide links 88 and 89 are inserted into the elongated holes 84 and 85 and slide rearward thereof, and the tape pull-out arm 93 on the right side also moves horizontally. As the tape 4 moves, the tape 4 is drawn out forward by the right tape drawing member 71.

At this time, the two elongated holes 84 and 85 have different centers of curvature, and the slide links 88 and 89 change their posture dually by sliding.

Therefore, the movement trajectory P of the tape pull-out member 71 at the tip of the tape pull-out arm 93 is as shown in FIG.
It draws an intermediate curved line with a large curvature in the early stage and a small curvature in the latter half. That is, at the beginning of the tape drawing movement, the forward movement component is large, and in the latter half, the movement component in the right lateral direction is large. Therefore, while the front M24 of the adapter main body 20 remains in the closed position, the tape 4 can be pulled out to a large extent laterally and outwardly even if the front and rear space inside the front lid 24 is small.

Being able to pull out the tape with the front lid 2.1 closed is extremely advantageous in preventing the tape 4 from coming into contact with other objects and being damaged before the adapter 1 is loaded onto the deck. That's true.

Next, one connecting pin 86 of the slide links 88 and 89 is connected to the rear end of the long hole 84, and the other connecting pin 87 is connected to the long hole 85.
When reaching the bending point, the small-diameter portions at the upper and lower ends of the right tape pull-out member 71 are connected to the L-shaped engaging portion 106a of the member 106, which is fixed at a position near the right corner of the front end of the adapter body 20.
The receiver is stopped and supported. As the operating lever 96 is further swung, the tips of the upper and lower slide links 88 and 89 rotate clockwise around the pin 86, as shown in FIG. Move to the edge.

Then, as the link rotates, the pin 91 moves toward the rear end of the dogleg-shaped elongated hole 92, so that the tape pull-out arm 93 is relatively connected to the tape guide member 71 and the engaging portion 106.
It is forcibly rotated counterclockwise around the locking point with a. The engaging recess 107 formed on the outer edge of the distal end of the arm 93 is connected to the locking protrusion 10 protruding from the member 106.
8, and the tape pull-out arm 93 is connected to the pin 9.
1. The receiver is fixed in a three-point supported state by the member 106 and the locking protrusion 108, so that the accumulated backlash of the link mechanism is absorbed, and the tape drawer member 71 is reliably positioned and supported by the member 106 in a vertical position.

Note that the upper and lower ends of the left tape drawer member 70 are connected to the L-shaped insertion portion 109a of the member 109 at the upper and lower ends of the receiver disposed at the left corner of the front end inside the adapter body 20.
The upper and lower ends are supported by the supports. Both ends of a click spring 115 having a loop portion in the middle are respectively latched and connected to the mud wall of the adapter body 20 and the tape pull-out arm 76, and the spring 115 moves the tape pull-out arm 76 to the intermediate moving position at the dead center. As a result, it is biased to move in the direction of the front drawer position and the rear direction of the entry position. Therefore, the tape drawer member 70 absorbs the accumulated looseness of the link mechanism, and the receiver is pressed against the engaging portion 109a of the member 109, and is reliably positioned and held in the vertical position at the drawer position, and is well held in the retracted position. Ru.

As described above, when the left and right tape drawer members 70 and 71 are moved diagonally to their forward movement limits and fixed,
This position corresponds to the original position of the front left and right tape guide members in a standard large tape cartridge, and the tape 4 is stretched between the left and right tape drawer members 70 and 71. When the adapter 1 is loaded onto the deck from this state, the front lid 24 of the adapter body 2o opens and the tape 4 is pulled out toward the rotating head in front by the tape loading pin on the deck side. Thus tape 4
is guided by both tape drawer members 70 and 71 and travels.

In the present invention, the means for moving the tape pull-out members 7o and 71 is not limited to the illustrated example; for example, the means for moving the tape pull-out members 70 and 71 may include slide grooves provided in the upper and lower walls of the adapter main body 20, respectively. The upper end of each tape pull-out member 70, 71 may be gripped and moved along the slide groove. Further, the movement locus P of these members may be such that they move perpendicularly to the front cover 24 in the early stage of movement, and move parallel to the front cover 24 in the latter half.

(9) Fixing mechanism for the small tape cartridge in the adapter storage chamber When the small tape cartridge 2 is stored and the adapter 1 is loaded on the deck, one drive shaft on the deck side is inserted through the bottom wall 21 of the adapter body 20. The tape reel 5 on the feeding side of the small tape cartridge 2 is inserted through the drive shaft insertion hole 22.
The tape reel 5 is fitted into the hub hole of the tape reel 5.

At this time, it is necessary to prevent the small tape cartridge 2 from floating up within the storage chamber 25.

To this end, the bin 110 is set up on the slide link 79 for moving the left tape drawer arm 76, and the base end of the lock arm 111 is rotatably supported on the inner surface of the upper case 20a of the adapter main body 20. The three prongs at the tip of the lock arm 111 are connected to the pin 110.
Connect the mouth/tsuk piece 112 from the base end of. In the state before the operation lever 96 operates to draw out the tape, the 15th
As shown in the figure, the lock piece 112 does not face the storage chamber 25, but when the link 79 slides to the left as the tape is pulled out, the four-piece lock piece 112 is retracted as shown in Figs. 16 and 17. The lock piece 112 enters into the chamber 25 and rotates, and the lock piece 112 engages in a semicircular recess 113 formed on the outer surface of the rear wall 51 of the small tape cartridge 2, thereby fixing the small tape cartridge nozzle 2. There is.

αO) Mechanism control lever 9 to prevent forgetting to operate the tape drawer
If the adapter 1 is loaded onto the deck without performing the tape pull-out operation in step 6, the deck will not operate because the tape 4 cannot be pulled out from the front of the adapter 1. Therefore, since the user may miss a long-awaited recording opportunity, it is necessary to notify the user as soon as possible that the tape withdrawal operation is being performed. It is also necessary to clearly determine the cause of the deck's inoperability. Furthermore, in the illustrated example adapter 1, a lamp insertion hole 116 into which a tape end detection lamp is inserted is provided in the front right and left center portion of the bottom wall 21, and the tape 4 is inserted into the lamp before the tape draw operation. Since it runs above the hole 116, if the adapter 1 is loaded onto the deck as it is, the lamp inserted into the lamp insertion hole 116 will hit the tape 4 and damage the tape 4. Therefore, in this respect as well, it is desirable to prevent the adapter 1 from being loaded onto the deck if the tape pull-out operation is forgotten.

Therefore, in this proposal, a groove 117 to prevent incorrect loading is formed in the bottom wall 21 of the adapter body 20 in a straight line from the front edge 21a of the bottom wall 21 to the lamp insertion hole 116.
A recessed portion 118 is formed at the lower end of the front lid 24 on an extension line of 7. This incorrect loading prevention groove 117 was originally
When the adapter is correctly loaded on the deck, the detector on the deck side slides into the political information 117 and allows the adapter 1 to be loaded. However, when the adapter 1 is loaded with the front and back or the top and bottom reversed, the adapter 1 does not fit on the deck. This is to prevent it from loading completely.

Then, the movable member 11 is placed on the inner surface of the bottom wall 21 at a position forward of the storage chamber 25 in the adapter main body 20.
9 is guided by a guide 120 and is fitted with a spring member 121 that urges it to slide in the left-right direction, and an upright piece 122 installed at the left end of the movable member 119 interferes with the swinging locus of the tip of the left tape pull-out arm 76. Set the position accordingly. 1st
In the state shown in FIG. 5 before the tape drawer operation, the movable member 119 is shifted to the right against the spring member 121 due to the contact between the arm 76 and the upright piece 122, and the right end 119a of the movable member 119 is erroneously loaded. The top of the prevention groove 117 is closed.

Therefore, under this condition, even if the adapter 1 is loaded onto the deck in the correct orientation, the detector on the deck side will interfere with the right end 119a of the movable member 119, so if the adapter 1 is loaded in the reverse direction or upside down. Similarly, the adapter 1 cannot be completely pushed into the deck and loaded. However, as shown in FIG. 17, when the tape drawer operation is performed, the movable member 119 is shifted to the left by the spring member 121 to prevent erroneous loading: a117 opens, so in this case, the adapter 1 can be pushed into the deck and loaded. become.

Drive mechanism for the tape reel of a small tape cartridge using an αD deck When the adapter 1 is loaded into the deck, the drive shaft on the deck side is inserted into the left and right drive shaft insertion holes 22 and 23 transparently provided in the bottom wall 21 of the adapter body 20. The drive shaft that has entered the drive shaft insertion hole 22 on the left side is the small tape cartridge 2.
It engages with the hub hole of the tape reel 5 on the feeding side. but,
The take-up tape reel 6 of the small tape cartridge 2 and the drive shaft insertion hole 23 on the right side are separated from each other, and a mechanism for rotationally driving the take-up tape reel 6 is required.

For this purpose, a drive gear 124 is provided within the adapter body 20, which has a hub hole 123 that is substantially the same as the hub hole of the tape reel in the large tape cartridge, as shown in FIG. is installed freely in the radial direction, and the small tape cartridge 2
An idle gear 12 having upper and lower gear parts 125a and 125b between the gear part 11 formed on the outer periphery of the lower flange 10 of the take-up side tape reel 6 and the drive gear 124.
5, and the upper gear part 125 of the idle gear 125
a to the drive gear 124 in a freely thrusting manner, and the lower gear part 1
The idle gears 125, which are respectively engaged with the gear portions 11 of the take-up side tape reel 6, are movable brackets 126 attached to the inner surface of the upper case of the adapter body 20.
It is suspended and supported from below via a support shaft 127 so as to be able to move up and down within a certain range, and is biased upward by a compression coil spring 128. Therefore, when the small tape cartridge 2 is inserted into the storage chamber 25 of the adapter body 20 from above, the reel gear part 11 is attached to the lower gear part 125b of the idle gear 125.
Even if the idle gear 1 does not mesh properly,
25 once escapes downward against the spring 128, and when the meshing phases match when the idle gear 125 starts to be driven, the idle gear 125 is automatically pulled up and into a normal meshing state.

As shown in FIG. 15, the bracket 126 is supported on the upper gauge 20a by engagement with a pin 129 and a long hole 130 so as to be rotatable within a certain angle range around the axis W' of the take-up tape reel 6. There is a tension spring 132 that urges the drive gear 124 and the reel gear portion 11 to move in a tree-like manner. Therefore, the idle gear 125
The drive gear 1 is always engaged with the beam-rugia part 11.
The gear 124 follows the free movement of the gear 124 and meshes with the gear 124 while always absorbing the play.

α Mechanism for winding the tape pulled out onto the tape reel of the small tape cartridge by operating the lever When the tape 4 pulled out from the small tape cartridge 2 is moved back to the original position from the front position by operating the lever The tape must be wound onto the tape reel of the small tape reel stringer 2. For this purpose, a mechanism is provided to take up and rotate the take-up tape reel 6 only when the operation lever 96 is returned to the counterclockwise direction.

That is, a fan-shaped gear 134 that rotates around the lever support shaft 80 together with the lever 96 is fixed to the tip side of the operating lever 96 as shown in FIGS. A rotating shaft 135 is erected on the bracket 1 and the upper end of the rotating shaft 135 is fixed to the upper case 20a.
36, the lower ends of which are rotatably supported by bearings 137 of the lower case 20b, and a sector gear 13 is mounted on the upper part of the rotating shaft 135.
4 is fixed, and a large diameter gear 139 is fixed to the lower end of the rotating shaft 135.
A swinging arm 140 is loosely fitted and supported in the upper and lower middle of the arm 140, a support shaft 141 is fixed downward to the tip of the arm 140, and large and small gears 142 and 143 are loosely fitted and supported in the upper and lower portions of the support shaft 141, respectively. The upper large gear 142 is the drive gear 12.
4, and the lower small gear 143 is always engaged with the large diameter gear 139.

A friction plate 145 made of synthetic resin is interposed between the upper and lower large and small gears 142 and 143, and a compression spring 146 attached to the lower end of the support shaft 141 causes the friction plate 1 to move between the large and small gears 142 and 143.
45 is elastically clamped, thereby forming a friction clutch 147 that transmits power only with a constant torque reduction.

On the lower surface of the sector-shaped gear 134, small-diameter concave cam surfaces 149 and 150 are formed at both ends, and an arcuate cam surface 151 concentric with the center of the gear is formed in the middle, and a cam follower 152 that comes into contact with these cam surfaces is formed. A helical spring 153 is loosely fitted to the rotating shaft 135 and is interposed between the cam follower 152 and the arm 140, and a weak spring 155 that pulls the arm 140 outward is installed.

In such a case, when the operation lever 96 is in the position before the tape drawer operation as shown in FIG. 24, the cam follower 1
52 faces the recessed cam surface 149 at one end of the fan-shaped gear 134 and the cam follower 152 is allowed to move freely, so the swing arm 140 is pulled by the tension spring 155 and the gear 14
2 is removed from the drive gear 124.

Next, when the operating lever 96 is swung clockwise as shown in FIG. 25 for tape draw-out operation, the fan-shaped gear 134
Since both rotate in the same direction, the cam follower 152 rides on the arcuate cam surface 151 and rotates counterclockwise. that time,
The swing arm 140 is prevented from swinging outward any further by a stopper (not shown).

When the operating lever 96 is swung to the tape withdrawal end position, the cam follower 152 is disengaged from the arcuate cam surface 151 and rotated back clockwise along the other recessed cam surface 150, as shown in FIG. Even in this state, the swing arm 140
does not move, and gear 142 is disengaged from drive gear 124. Therefore, even if the adapter 1 is loaded on the deck and the drive shaft on the deck side drives the drive gear 124 to rotate, no power is transmitted to the gear 142.

However, when the adapter 1 is removed from the deck after use and the operating lever 96 is swung counterclockwise, the cam follower 152 is forcibly rotated clockwise as shown in FIG. Since the swing arm 140 rides on the spring 155 due to the tensile force of the helical spring 153,
The gear 142 at the tip of the swinging arm 140 swings against the
meshes with the drive gear 124.

When the operation lever 96 is returned to its original position, the rotation of the pinion gear 138 that engages with the fan-shaped gear 134 is transmitted to the drive gear 124 via each gear group, and the take-up tape reel 6 is moved to the idle gear 125 to release the tape. Rotates in the winding direction. In reality, the tape reel 6 rotates approximately five times due to the combination of large and small gears. As a result, the tape 4, which had been drawn out to the front of the adapter main body 20 as the left and right tape drawing members 70 and 71 moved in and out, is wound onto the tape reel 6 without slack.

However, if, for example, the tape 4 is fully wound on the winding-side tape reel 6, the amount of tape winding will be greater than the amount of tape being pulled out. In such a case, the aforementioned friction clutch 147 is activated to prevent undue tension from being applied to the tape 4.

A little before the operation lever 96 reaches the return end (approximately 7 degrees), the tape pull-out link mechanism reaches its operating limit, but the bell crank 81 and the operation lever 96 are connected to the elongated hole 97 and the pin 98.
The operating lever 96 provides flexibility by engaging with the operating lever 96.
can further swing against the spring 99, and the tape drawer member 7
The winding operation is also carried out after entering and exiting 0.71, and the winding-side tape reel 6 is rotated approximately half a turn. Therefore, the final winding of the tape 4 is performed with a tension corresponding to the set torque of the friction clutch 147, and the tape 4 is wound tightly.

According to the present invention as described above, of the left and right tape drawer members 70 and 71, at least the tape drawer member 71 which has a large amount of lateral movement from the retracted position to the drawer position
In this case, the movement trajectory P from the entry position to the withdrawal position is set so that at the beginning of the movement, the forward movement component is more than the lateral movement component, and in the latter half, the lateral movement component is more than the forward movement component. . Therefore, the tape drawer member 71 can be pulled out from the retracted position forward without contacting or interfering with the front edge of the small tape cartridge 2, and does not protrude to the front of the adapter body 20 during movement. In other words, the tape drawer member 71 can move largely in the left and right directions in a small front and rear space within the adapter main body, and the tape drawer member 71 can be moved to a predetermined position in front of the adapter main body 20, which simulates a large tape cartridge, without any hindrance. be able to.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of an adapter and a small tape cartridge according to the present invention as seen from the rear side, and FIG. 2 is a perspective view of them as seen from the front. Figure 3 is a plan view mainly showing the storage chamber for the adapter;
The figure is a sectional view taken along the line A-A in Fig. 3, Fig. 5 is a sectional view taken along the line B-B in Fig. 3, and Fig. 6 is a sectional view taken along the line C-C in Fig. 3.
Figure 7 is a cross-sectional view taken along the line D-D in Figure 3, Figure 8 is a partially cutaway side view of the storage chamber with the lid open, and Figure 9 is a small tape removed from the storage chamber. FIG. 3 is a longitudinal cross-sectional view showing how to remove the cartridge. 10 to 14 do not illustrate the tape erase prevention mechanism built into the small tape cartridge; FIG. 10 is a perspective view, FIG. 11 is a plan view, and FIG. 12 is an E in FIG. 11. 13 is a sectional view taken along the line F--F in FIG. 11, and FIG. 14 is a longitudinal sectional view corresponding to FIG. 13 in a state where the small tape cartridge has an erroneous erasure prevention piece. 15 to 20 show the tape drawer mechanism, FIG. 15 is a plan view showing the state before the tape drawer operation, FIG. 16 is a plan view showing the state during the tape drawer operation, and FIG. 17 18 is a plan view showing the state after the tape drawer operation, FIG. 18 is a sectional view taken along the line GG in FIG. 17, and FIG.
The drawings are a sectional view taken along the line H--H in FIG. 17, FIG. 20 is a schematic perspective view of the tape drawer link mechanism, and FIG. 2F is an exploded perspective view showing a part of the tape drawer link mechanism. Figures 22 to 27 show the tape winding mechanism. Figure 22 is a longitudinal sectional view of the main parts, Figure 23 is a perspective view of the main parts, and Figures 24 to 27 are the operation levers. 24 is a plan view showing the relationship between the movement and the tape winding mechanism over time, FIG. 24 is before the tape is pulled out, FIG. 25 is during the tape being pulled out, FIG. 26 is when the tape is being pulled out, and FIG. 27 is during the operation. Each figure shows a state in which the lever is operated to return and the tape is being wound. 1...Adapter, 2...Small tape cartridge, 4...Tape, ・Adapter body, ・Storage chamber, 1...Tape drawer member, ・Operation lever-67: Figure

Claims (1)

[Claims] (1) The adapter body (20) is formed to have substantially the same external shape as the large tape cartridge, and the small tape cartridge (2) can be freely inserted and removed near one side of the adapter body (20). storage room (25
), the adapter body (20) is equipped with an opening/closing lid (35) that can be closed and opened on the top of the opening of the storage chamber (25), and the adapter body (20) is equipped with an opening/closing lid (35) that can be closed and closed. A small tape cartridge adapter characterized by being equipped with a closing lock mechanism for holding the cartridge in its position.