JPH05182323A - Tape supply and take-up device and tape cassette used for it - Google Patents

Abstract

PURPOSE:To make the constitution of the tape supply and take-up device for a video tape recorder capable of loading two large and small kinds of tape cassettes small-sized without complicating its structure. CONSTITUTION:The device is constituted to be capable of loading two large and small kinds of tape cassettes by moving reel bases 51 and 51 in position in accordance with the large or small tape cassette to be loaded. At the time of loading the large cassette 1, positioning pins 60 and 60 and a lid opener 58 for the small cassette 25 are positioned in a mouth part 4 of the large cassette.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel tape supply / winding device and a tape cassette used in the device. More specifically, there is provided a novel tape supply / winding device capable of mounting a tape supply / winding device capable of mounting two types of tape cassettes, large and small, in a small size without complicating the structure, and a tape cassette used in the device. It is the one we are trying to provide.

[0002]

2. Description of the Related Art As a tape supply and winding device, for example, a video tape recorder, there is a so-called compatible type in which two types of tape cassettes, large and small, can be used.

In a conventional compatible type video tape recorder, a tape pull-out member insertion opening called a mouse portion is generally used to commonly use a tape pull-out member for pulling out a tape from a tape cassette. In order to protect the tape when not in use, a front lid and a back lid that cover the tape from the front and back are provided, and in order to make the lid opener common to large and small tape cassettes,
The lid opener was inserted into the mouse to raise the back lid, and the positioning of the large and small tape cassettes was performed on the same plane.

[0004]

By the way, in the conventional compatible type video tape recorder as described above, the mouse portion of the large tape cassette cannot be enlarged, and the tape loading, that is, the tape There is a problem that there are various restrictions on the withdrawal from the cassette case.

On the contrary, the size of the mouse of the small tape cassette is the same as that of the large tape cassette, and there is a limit to reducing the size of the mouse portion of the large tape cassette. There is a problem in that the mouse portion of the tape cassette cannot be made too small, which limits the size of the small tape cassette.

Further, since the lid opener is inserted in the mouse part, the space for inserting the guide for loading the tape, the pinch roller, etc. becomes small, which is not only difficult to design, but also various members can be installed in a narrow space. However, there is a problem that breakdowns are likely to occur due to the intricacies.

[0007]

In order to solve the above-mentioned problems, the tape supply / winding device of the present invention is configured so that two types of tape cassettes, large and small, can be mounted, and the large tape cassette is mounted when the large tape cassette is mounted. The cassette positioning member and the lid opening member of the small tape cassette are positioned in the tape pull-out member insertion opening.

When the tape cassette of the present invention is mounted on a tape supply / winding device which is constructed so that two types of tape cassettes, large and small, having different heights on the bottom surface of the tape cassette when mounted, A hole for escaping a positioning member for positioning the tape cassette having a higher height is formed.

[0009]

Therefore, in the tape feeding / winding device according to the present invention, the mouse portion of the large tape cassette can be made larger than the mouse portion of the small tape cassette, and the tape suitable for each of the large and small tape cassettes. Since loading and the like can be performed, various restrictions that have been present in the past are eliminated.

Further, in the tape cassette according to the present invention, the mouse portion of the small tape cassette can be made small, and therefore the small tape cassette can be made smaller.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the tape supply and winding device of the present invention and the tape cassette used in the device will be described below with reference to the illustrated embodiments. In the illustrated embodiment, the present invention is applied to a compatible type video tape recorder and a tape cassette used in the video tape recorder.

First, the tape cassette will be described.

Reference numeral 1 is a large tape cassette, and 2 is its cassette case.

The cassette case 2 is in the shape of a horizontally long rectangular flat box when seen in a plan view, and tape outlets 3 are formed at both left and right ends of the front surface thereof.

A mouth portion 4 is formed between the tape outlets 3 and 3 on the front surface of the cassette case 2 and opens forward and downward. The mouth portion 4 serves as a tape pull-out member insertion opening.

Denoted at 5 and 5 are cylindrical tape guides which are erected at the positions of the mouths 4 of the tape outlets 3 and 3.
The tape guides 5 and 5 are formed with positioning holes 6 and 6 which are opened on the bottom surface of the cassette case 2.

Numerals 7 and 7 are insertion holes for exposing reel stand engaging holes formed in a reel hub of a tape reel, which will be described later, to the outside of the cassette case 2. ing.

Reference numerals 9 and 9 denote light guide holes formed on the walls that define both sides of the mouth portion 4, and 10 and 10 indicate light guide holes formed on the front end portions of the left and right side walls of the cassette case 2.

Reference numeral 11 is an escape hole which is formed at a position on the rear side of the intermediate position between the insertion holes 7 and 7 and which is opened on the lower surface of the bottom wall 8.

In this cassette case 2, two tape reels 12, 12 are rotatably housed.
The tape reel 12 includes a cylindrical reel hub 13 and upper and lower flanges 14 and 15 that are integrally or integrally projected from the upper and lower end portions of the reel hub 13. The lower end portion 13a of the reel hub 13 projects slightly downward from the lower flange 15, and the amount of projection is equal to or smaller than the thickness of the bottom wall 8 of the cassette case 2. Also,
The outer diameter of the protrusion 13a is smaller than the inner diameter of the insertion hole 7 of the cassette case 2.

The reel hub 13 of the tape reel 12 is formed with a reel base engaging hole 16 opened at the lower end thereof, and the lower end portion of the reel base engaging hole 16 has an enlarged diameter 16a. Details of the dimensions of the expanded diameter portion 16a will be described later.

However, such a tape reel 12,
Both ends of the magnetic tape 17 are fixed to the 12 reel hubs 13 and 13 and wound by a predetermined amount. The tape reels 12 and 12 are rotatably housed in the cassette case 2 with the lower end portions 13a and 13a of the reel hubs 13 and 13 located in the insertion holes 7 and 7, and the magnetic tape 17 is a part thereof. Is guided to the outside of the cassette case 2 through the tape outlets 3 and 3, and both ends of the pulled-out portion are positioned along the front surface of the cassette case 2 while being wound around the tape guides 5 and 5.

Reference numeral 18 denotes a front lid rotatably supported on the front end of the cassette case 2. The front lid 19 has a plate-like shape that extends to the left and right to cover the front surface of the cassette case 2 and both left and right ends of the front portion 19. Sides 20, 20 protruding rearward
And the front edge is the upper edge of the front portion 19 and the left and right side edges are the side portions 20, 2.
The upper edge 21 is continuous with the upper edge of 0 and is integrally formed. The side portions 20, 20 are rotatably supported on the left and right side surfaces of the front end portion of the cassette case 2.

The front lid 18 is biased by a spring means (not shown) in the closing direction, and when not in use, the closing position shown in FIG. It covers the front surface of the portion led out of the cassette case 2. Then, when it is mounted on the video tape recorder, it is rotated by a lid opener to be described later and moved to the open position (see FIG. 2) where the front of the magnetic tape 17 is opened.

A shutter 22 is slidably supported in the front-rear direction on the bottom of the cassette case 2 as in the DAT tape cassette, and is biased forward by a spring means (not shown). There is.

The shutter 22 is formed with two reel base insertion holes 23, 23 and one facing hole 24 which are spaced apart from each other on the left and right sides.

When the shutter 22 is at the front end of its moving range, that is, at the closed position, the shutter 22
The reel stand insertion holes 23, 23 and the facing hole 2 formed in the
4 is at a position displaced from the insertion holes 7 and 7 and the escape hole 11 of the cassette case 2, whereby the insertion holes 7 and 7 and the escape hole 11 of the cassette case 2 are closed by the shutter 22. Further, the lower surface side of the mouth portion 4 of the cassette case 2 is closed by the front end portion of the shutter 22 (see FIG. 3). Therefore, the front portion of the mouth portion 4 is closed by the front lid 18, and the lower surface of the mouth portion 4 is closed by the shutter 22, so that the mouth portion 4 is completely closed to the outside.

When the tape cassette 1 is mounted on the video tape recorder, the shutter 22 moves backward and moves to the open position, like the DAT tape cassette. When the shutter 22 reaches the open position,
The reel base insertion holes 23, 23 of the shutter 22 are respectively aligned with the insertion holes 7, 7 of the cassette case 2, and the reel base engagement holes 16, 16 of the tape reels 12, 12 are respectively the insertion holes 7, 7 and the reel base. It is exposed to the outside through the insertion holes 23, 23, and the exposure hole 24 of the shutter 22 is aligned with the escape hole 11 of the cassette case 2, and the escape hole 11 is exposed to the outside (see FIG. 4).

Next, the small tape cassette 25 will be described.

The small tape cassette 25 is approximately one-half the size of the large tape cassette 1 when viewed in a plan view.

Reference numeral 26 denotes a cassette case. The cassette case 26 has a flat box shape having a horizontally long rectangular shape in a plan view, and the tape outlet 2 is provided at both left and right ends of the front surface.
7, 27 are formed. The left-right width of the cassette case 26 is substantially equal to the front-back width of the cassette case 2 of the large tape cassette 1, and the front-back width is the cassette case 2.
It is about 1/2 of the left-right width of the. The left and right width of the cassette case 26 is smaller than the left and right width of the mouse portion 4 of the large tape cassette 1.

Further, a mouth portion 28 that is open forward and downward is formed between the tape outlets 27 and 27 on the front surface of the cassette case 26. The mouth portion 28 serves as a tape pull-out member insertion opening.

Numerals 29 and 29 are cylindrical tape guides which are erected at the positions of the mouths of the tape outlets 27 and 27. The tape guides 29 and 29 are provided with the cassette case 2.
Positioning holes 30, 30 are formed on the bottom surface of the plate 6. The distance between the positioning holes 30 and 30 is determined by the mouth portion 4 of the cassette case 2 of the large tape cassette 1.
It is sufficiently smaller than the left and right width.

Reference numerals 31 and 31 denote reel base engaging holes formed in a reel hub of a tape reel which will be described later.
6 is an insertion hole that is exposed to the outside, and is formed in the bottom wall 32 of the cassette case 26 so as to be separated from each other in the left and right directions.

Reference numerals 33 and 33 denote light guide holes formed in the walls that define both sides of the mouth portion 28, and 34 and 34 denote light guide holes formed in the front end portions of the left and right side walls of the cassette case 26.

Two tape reels 35, 35 are rotatably housed in such a cassette case 26. The tape reel 35 includes a cylindrical reel hub 36 and upper and lower flanges 37 and 38 integrally or integrally projecting from both upper and lower end portions of the reel hub 36. And
The lower end portion 36a of the reel hub 36 projects downward from the lower flange 38, and the protruding amount is the cassette case 26.
The thickness of the bottom wall 32 is equal to or smaller than that. Further, the outer diameter of the protruding portion 36a is equal to that of the cassette case 26.
The inner diameter of the insertion hole 31 is smaller than that of the insertion hole 31.

However, such a tape reel 35,
Both ends of the magnetic tape 40 are fixed to the reel hubs 36, 36 of 35 and wound by a predetermined amount. Such tape reels 35, 35 are rotatably housed in the cassette case 26 with the lower end portions 36a, 36a of the reel hubs 36, 36 located in the insertion holes 31, 31, and the magnetic tape 40 is a part thereof. Is led out from the tape outlets 27, 27 to the outside of the cassette case 26, and both ends of the led-out portion are positioned along the front surface of the cassette case 26 while being wound around the tape guides 29, 29.

Reference numeral 41 denotes a front lid rotatably supported on the front end of the cassette case 26. The front lid 42 covers the front surface of the cassette case 26 and has a plate shape extending in the left-right direction. The side portion 43 protruding rearward,
43 and the front edge are the upper edges of the front portion 42 and the left and right edges are the side portions 4
A continuous upper surface portion 44 is integrally formed with the upper edges of the reference numerals 3 and 43. The side portions 43, 43 are rotatably supported on the left and right side surfaces of the front end portion of the cassette case 26.

Further, the front lid 41 is urged by a turning means in a closing direction by spring means (not shown), and when not in use, the closing position shown in FIG. It covers the front surface of the portion led out of the cassette case 26. Then, when it is mounted on the video tape recorder, it is rotated by a lid opener to be described later and moved to the open position where the front of the magnetic tape 40 is opened (see FIG. 7).

A shutter 45 is supported on the bottom of the cassette case 26 so as to be slidable in the front-rear direction, as in the DAT tape cassette, and is biased forward by a spring means (not shown). There is.

The shutter 45 is formed with two reel stand insertion holes 46, 46 which are spaced apart from each other on the left and right sides.

When the shutter 45 is at the front end of its moving range, that is, in the closed position, the shutter 45
The reel stand insertion holes 46, 46 formed at the position are displaced from the insertion holes 31, 31 of the cassette case 26, whereby the insertion holes 31, 31 of the cassette case 26 are closed by the shutter 45. .. Further, the lower surface side of the mouse portion 28 of the cassette case 26 is the shutter 4
It is in a state of being closed by the front end portion of the No. 5 (see FIG. 8). Accordingly, the front portion 41 of the mouth portion 28 is closed by the front lid 41 and the bottom portion thereof is closed by the shutter 45, so that the mouth portion 28 is completely closed to the outside.

Then, when the tape cassette 25 is mounted on the video tape recorder, the shutter 45 moves backward and moves to the open position, like the DAT tape cassette. When the shutter 45 reaches the open position, the reel base insertion holes 46, 46 of the shutter 45 are aligned with the insertion holes 31, 31 of the cassette case 26, and the reel base engagement holes 40, 40 of the tape reels 35, 35 are released. Insertion holes 31, 31 and reel stand insertion holes 46, 46, respectively
Is exposed to the outside (see FIG. 9).

Next, the video tape pre-coder 47 using the tape cassettes 1 and 25 will be described.

Reference numeral 48 denotes a chassis of the video tape recorder 47, on which a reel stand supporting arm 49,
49 is rotatably supported. Reference numerals 50 and 50 denote support shafts that are provided so as to be spaced apart from each other in the left-right direction at a substantially central portion near the rear portion of the chassis 48, and the base ends of the reel base support arms 49 and 49 are respectively attached to the support shafts 50 and 50. It is rotatably supported separately.

Reference numerals 51 and 51 denote reel stands, which are rotatably supported by the rotary ends of the reel stand supporting arms 49 and 49.

The reel base 51 has a disk-shaped mounting portion 52.
And a gear portion 53 integrally formed on the lower surface of the mounting portion 52, and a reel engaging shaft 54 protruding upward from the upper end of the mounting portion 52 is provided.

The mounting portion 52 is formed in two steps, an outer portion 52a and an inner portion 52b, and the inner portion 52b is higher than the outer portion 52a and has a smaller diameter. Then, the tape reel 1 of the large tape cassette 1
The inner diameter of the enlarged diameter portion 16a of the reel stand engaging hole 16 of No. 2 is larger than the outer diameter of the inner side portion 52b of the mounting portion 52 of the reel stand 51,
In addition, it is formed smaller than the outer diameter of the outer portion 52a, and
The height of the expanded diameter portion 16a is slightly larger than the protruding height of the inner portion 52b from the outer portion 52a.

The reel base support arms 49, 49 are rotatable between a large cassette drive position shown in FIG. 11 and a small cassette drive position shown in FIG. 12, and drive gears (not shown) are provided at the respective drive positions. Are reel stands 51, 5
The reel base is driven to rotate by meshing with any one of the above.

55 and 55 are light receiving elements arranged at positions on the left and right sides of the chassis 48 closer to the front part than the center in the front-rear direction, and 56 is arranged at an intermediate position between the two light receiving elements 55. These are light emitting elements, and these light receiving elements 5
5, 55 and the light emitting element 56 are arranged in a substantially straight line.

Reference numeral 57 is a lid opener for the large tape cassette 1 arranged in a position close to one light receiving element 55, and 58 is a light emitting element 56 from the lid opener 57.
It is a lid opener for the small tape cassette 25 arranged at a position closer to it, and a pressing pin 58a horizontally protruding inward is formed at an upper end portion of the lid opener 58 for the small tape cassette 25.

Numerals 59 and 59 are positioning pins for the large tape cassette 1 which are erected on the chassis 48, and are formed by a conical insertion portion 59b protruding from the upper end surface of a cylindrical main portion 59a, The upper end surface of the main portion 59a serves as a surface for determining the height, and the insertion portion 59b performs horizontal positioning. One of these positioning pins 59, 59 is between the lid openers 57 and 58,
It is erected at a position close to the lid opener 58 for the small tape cassette 25, and the other positioning pin 59 is arranged at a position symmetrical with the one positioning pin 59.

Numerals 60, 60 are positioning pins for the small tape cassette 25 which are erected on the chassis 48, and are constituted by a cylindrical main portion 60a having a conical insertion portion 60b protruding from the upper end surface thereof. The upper end surface of the main portion 60a serves as a surface for determining the height, and the insertion portion 60b performs horizontal positioning. One of the positioning pins 60, 60 is connected to the light emitting element 56 from the lid opener 58.
The locating pin 60 is erected at a position closer to the other side, and the other positioning pin 60 is disposed at a position symmetrical to the one locating pin 60.

Reference numerals 61 and 61 denote height determining pins for the large tape cassette 1, which are erected upright in the chassis 48 at positions separated substantially rearward from the positioning pins 59 and 59, and whose upper end surfaces 61a and 61a serve as references. Is a face.

Reference numeral 62 denotes a height determining pin for the small tape cassette 25, which supports the support shafts 50 and 50 of the chassis 48.
It is erected at a position in the middle of the front of the broom, and its upper end surface 6
2a is the reference surface.

The upper end surfaces of the main portions 59a, 59a of the positioning pins 59, 59 and the reference surfaces 61a, 61a of the height determining pins 61, 61 are substantially in the same plane, and
The upper end surfaces of the main portions 60a, 60a of the positioning pins 60, 60 and the reference surface 62a of the height determining pin 62 are substantially in the same plane. Then, the main parts 60a of the positioning pins 60, 60,
The upper end surface of 60a and the surface of the height determining pin 62 on which the reference surface 62a is located are the main portions 59 of the positioning pins 59, 59.
a, 59a and the reference surface 61 of the height determining pin 61
It is located slightly above the surface where a is located.

In addition to this, various members such as a head drum, a tape pull-out member, various tape guides, and a tension regulator are provided, but illustration and description thereof are omitted.

The use of the large and small tape cassettes 1 and 25 will be described below.

First, the use of the small tape cassette 25 will be described.

The small tape cassette 25 is attached to a cassette holder (not shown). Then, as in the case of the DAT tape cassette, the shutter 45 moves to the open position. Further, when it is detected that the small tape cassette 25 is mounted, the reel base support arms 49, 49 rotate,
It is located in the small cassette drive position.

Then, the cassette holder descends,
The tape cassette 25 is mounted in the cassette mounting position, and the reel engagement shafts 54, 54 of the reel bases 51, 51 engage with the reel base engagement holes 39, 39 of the tape reels 35, 35. Then, the reel hub 3 of the tape reels 35, 35
The lower ends of 6, 36 are the mounting portions 52, 5 of the reel stands 51, 51.
The second inner parts 52b and 52b are placed. As a result, the lower flanges 38, 38 of the tape reels 35, 35 are slightly raised from the inner bottom surface of the cassette case 26.

While the cassette holder is descending, the tip of the pressing pin 58a of the lid opener 58 comes into contact with the lower edge of one side portion 43 of the front lid 41, and from there, the cassette holder, that is, As the tape cassette 25 descends, the pressing pin 58a relatively pushes the lower edge of the side portion 43 of the front lid 41 upward, whereby the front lid 41 is moved to the open position. It

Then, the insertion portions 60b, 60b of the positioning pins 60, 60 are inserted into the positioning holes 30, 30 to position the tape cassette 25 in the horizontal direction.
Further, the upper end surfaces of the main portions 60a, 60a of the positioning pins 60, 60 contact the opening peripheral portions of the positioning holes 30, 30, and the reference surface 62a of the height determining pin 62 contacts the lower surface of the bottom wall 32 of the cassette case 26, respectively. The height of the tape cassette 25 is defined in contact therewith.

After that, the magnetic tape 40 is loaded and a reproducing operation or a recording operation is performed.

The light emitting element 56 is located inside the mouse 28, and the light guide holes 33, 33 and 34 of the tape cassette 25,
34 is aligned on the optical path connecting the light emitting element 56 and the light receiving elements 55, 55. Therefore, when the tape end is reached and the transparent portion at the end of the magnetic tape 40 crosses the optical path, the light of the light emitting element 56 is received by the light receiving element 55,
As a result, the tape end is detected.

Next, the use of the large tape cassette 1 will be described.

The large tape cassette 1 is mounted in a cassette holder (not shown). Then, the shutter 22 moves to the open position. Further, when it is detected that the large tape cassette 1 is loaded, the reel base support arms 49, 49 rotate and are positioned at the large cassette drive position.

Then, the cassette holder descends,
The tape cassette 1 is mounted in the cassette mounting position, and the reel engaging shafts 54, 54 of the reel bases 51, 51 engage with the reel base engaging holes 16, 16 of the tape reels 12, 12.
Then, the reel hubs 13 and 1 of the tape reels 12 and 12
The lower end of 3 is placed on the outer portions 52a, 52a of the placing portions 52, 52 of the reel stands 51, 51. As a result, the lower flanges 15, 15 of the tape reels 12, 12 are slightly lifted from the inner bottom surface of the cassette case 2. Then, at this time, the mounting portions 5 of the reel stands 51, 51
The inner portions 52b and 52b of the second and second 52 are large tape cassettes 1
Tape reels 12, reel reel engaging holes 16, 16
It is adapted to be located in the enlarged diameter portions 16a, 16a.

While the cassette holder is descending, the upper edge of the lid opener 57 comes into contact with the lower edge of the front lid 18 near the one side 20 of the front surface 19, and from there, the cassette holder is further moved. That is, as the tape cassette 1 descends, the upper edge of the lid opener 57 causes the front portion 19 of the front lid 18 to move.
The lower edge of the front lid 18 is pushed up relatively, which moves the front lid 18 to the open position.

Then, the insertion portions 59b, 59b of the positioning pins 59, 59 are inserted into the positioning holes 6, 6 to position the tape cassette 1 in the horizontal direction, and
The upper end surfaces of the main portions 59a, 59a of the positioning pins 59, 59 are located at the peripheral edges of the openings of the positioning holes 6, 6 and the height determining pin 6 is formed.
The heights of the tape cassette 1 are defined by the reference surfaces 61a and 61a of the tape cassettes 1 and 61 contacting the lower surface of the bottom wall 8 of the cassette case 2, respectively.

When the large tape cassette 1 is mounted on the video tape recorder 47, the lid opener 58 for the small tape cassette 25, the positioning pins 60 and 60 for the small tape cassette 25, and the light emitting element 5 are installed in the mouse 4.
6 is located. Then, the light guide holes 9, 9 and 10, 10 of the tape cassette 1 are provided with the light emitting element 56 and the light receiving element 55,
It is aligned on the optical path connecting 55 and 55. Further, the height determining pin 62 for the small tape cassette 25 has its upper end inserted into the clearance hole 11 of the large tape cassette 1, and the height of the reference surface 62a of the height determining pin 62 is larger than that of the large tape cassette 1. Even if the position is higher than the height of the lower surface of the bottom wall 8, there is no problem.

After this, the magnetic tape 40 is loaded and a reproducing operation or a recording operation is performed.

[0073]

As is apparent from the above description, the tape supply / winding device according to the present invention is configured so that two types of tape cassettes, large and small, can be loaded, and the large tape cassette can be loaded when the large tape cassette is loaded. The cassette positioning member and the lid opening member of the small tape cassette are located in the tape pull-out member insertion opening.

Further, when the tape cassette according to the present invention is mounted on a tape supply / winding device configured so that two types of tape cassettes, large and small, having different heights of the bottom surfaces of the tape cassettes when respectively mounted are mounted. In addition, a hole for escaping a positioning member for positioning the tape cassette having a higher height is formed.

Therefore, in the tape supply / winding device according to the present invention, the mouse portion of the large tape cassette can be made larger than the mouse portion of the small tape cassette, and the tape suitable for each of the large and small tape cassettes. Since loading and the like can be performed, various restrictions that have been present in the past are eliminated.

Further, in the tape cassette according to the present invention, the mouse portion of the small tape cassette can be made small, which makes it possible to make the small tape cassette smaller.

It should be noted that the specific shapes and structures shown in the above embodiments are merely examples for embodying the present invention, and the technical scope of the present invention is limitedly interpreted by these. It is not something that will be done.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a front lid and a shutter of a large tape cassette are in a closed position.

FIG. 2 is a perspective view showing a state in which a front lid and a shutter of a large tape cassette are in an open position.

FIG. 3 is a bottom view showing a state in which a front lid and a shutter of the large tape cassette are in a closed position.

FIG. 4 is a bottom view showing a state in which a front lid and a shutter of the large tape cassette are in an open position.

FIG. 5 is a horizontal sectional view of a large tape cassette.

FIG. 6 is a perspective view showing a state in which a front lid and a shutter of the small tape cassette are in a closed position.

FIG. 7 is a perspective view showing a state in which a front lid and a shutter of the small tape cassette are in an open position.

FIG. 8 is a bottom view showing a state in which the front lid and the shutter of the small tape cassette are in the closed position.

FIG. 9 is a bottom view showing a state in which the front lid and the shutter of the small tape cassette are in the open position.

FIG. 10 is a horizontal sectional view of a small tape cassette.

FIG. 11 is a plan view of the video tape recorder showing a state where the reel base is in the large cassette drive position.

FIG. 12 is a plan view of the video tape recorder showing a state where the reel stand is in the small cassette drive position.

FIG. 13 is a horizontal sectional view showing a state in which a large tape cassette is mounted on a video tape recorder.

14 is an enlarged sectional view taken along line XIV-XIV in FIG.

FIG. 15 is a horizontal sectional view showing a state in which the small tape cassette is mounted on the video tape recorder.

16 is an enlarged cross-sectional view taken along the line XVI-XVI of FIG.

[Explanation of symbols]

 1 large tape cassette 4 tape pull-out member insertion opening 11 hole for escaping positioning member 25 small tape cassette 47 tape supply / winding device 55 light receiving element 56 lamp 58 lid opening member 60 cassette positioning member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichiro 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Takashi Sawada 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Chiaki Sugai 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (3)

[Claims] 1. A cassette positioning member and a lid opening member for a small tape cassette are located in a tape pull-out member insertion opening of the large cassette when the large and small types of tape cassettes are mountable. Characteristic tape supply and winding device. 2. A lamp for detecting a tape end, which is inserted into the tape cassette when each of the large and small tape cassettes is mounted, and a light receiving element outside the tape cassette, which detects light emitted from the lamp, are shared. The tape supply and winding device according to claim 1. 3. A tape feeding and winding device configured to be capable of mounting two types of tape cassettes, large and small, having different heights of the bottoms of the tape cassettes when mounted, respectively. A tape cassette comprising a hole through which a positioning member for positioning the tape cassette escapes.