JP2658288B2 - Cassette holder device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette holder device having a guide mechanism and an erroneous insertion prevention mechanism for inserting a small cassette tape into a cassette holder for a large cassette tape.

2. Description of the Related Art Hereinafter, a conventional cassette holder device including a small cassette guide mechanism and an erroneous insertion prevention mechanism will be described with reference to the drawings.

FIG. 8 is a rear view of a large cassette tape (hereinafter, simply referred to as a large cassette). In the figure, 1 is a large cassette, 2
Is a relief groove provided on the back surface, 3 is a supply side reel, 4
Denotes a take-up reel.

FIG. 9 is a rear view of a small cassette tape (hereinafter, simply referred to as a small cassette). In the figure, 5 is a small cassette, 6
Is a guide groove provided on the back surface, 7 is a supply side reel,
Reference numeral 8 denotes a take-up reel.

FIG. 10 is a front view showing the positional relationship between the large cassette 1 and the small cassette 5 in the cassette holder. This indicates that the guide grooves 2 and 6 are in the same positional relationship based on the left side surfaces of the large cassette 1 and the small cassette 5.

FIG. 12 is a perspective view of a large cassette, and FIG. 13 is a perspective view of a small cassette. In FIG. 12, two reels provided inside a large cassette 1 formed in a box body have flanges 29 and 30, respectively. Reference numeral 31 denotes a cover for normally covering the tape front portion of the cassette, and a spring (not shown).
Is biased in the closing direction by an inclined surface 31-
b is provided. Reference numerals 32 and 33 denote grip grooves formed at the rear of the inclined surface of the large cassette 1. Also, in FIG.
The reels provided inside the small cassette 5 have flanges 35 and 36, respectively. Reference numerals 37 and 38 denote grip grooves formed on the rear side of the small cassette 5. Further, reference numeral 39 denotes a front pig for protecting the tape span on the front of the cassette, and reference numeral 40 denotes a rear pig for protecting the tape span, and each of the lids 39 is usually provided by a spring (not shown).・ 40 is biased in the closing direction. The front pig 40 has an inclined surface 39-b at the front of the upper surface, and has a step portion 40-a composed of the front pig 39 and the rear pig 40.

FIG. 11 shows a conventional cassette holder device. In the figure, 9 inserts the large cassette 1 or the small cassette 5 and
It is a cassette holder member for mounting and discharging to and from a device body (not shown) such as R. Cassette holder member 9
A cassette guide for guiding the small cassette 5 when it is inserted and for preventing the cassette from being inserted in the wrong direction.
11 is attached by scissors. A top plate 10 is attached to the upper portion of the cassette holder member 9 by screwing, and has a box shape. At the top of the top plate 10, three mechanisms are mounted to prevent the large cassette 1 and the small cassette 5 from floating when mounted on the apparatus body. The first mechanism is a cassette holding lever 12 attached to a position corresponding to the upper right end of the large cassette 1. In the first mechanism, the cassette holding lever 12 which rotates about the pin 13 is urged downward by the force of the spring 14.
The second mechanism is a cassette holding lever 15 attached to a position corresponding to the upper left end of the large cassette 1 and the small cassette 5. In the second mechanism as well, the cassette holding lever 15 pivoting about the pin 16 is urged downward by the force of the spring 17. The third mechanism is a cassette holding lever 18 attached to a position substantially at the center of the large cassette 1 and at the upper right end of the small cassette 5. In this third mechanism, a cassette holding lever 18 pivoting about a pin 19 is urged downward by the force of a spring 20, and a roller 21 is pressed into the upper portion of the large cassette 1 and the small cassette 5 by a press-fit pin. It is supported rotatably at 22. 25, 26 and 27 are cassette stoppers.
Numerals 25 and 26 are formed by cutting and raising from the cassette holder 9, and are formed by caulking pins to the stopper 27 on the holder. These stoppers 25, 26, 27 regulate the depth of the cassette when inserted.

Problems to be Solved by the Invention However, the conventional device has the following problems.

(1) Although the cassettes 1 and 5 are not shown, when the cassettes 1 and 5 are mounted on the main body of the apparatus, the reel bases are engaged with the reels 3 and 4 in the large cassette 1 and the reels 7 and 8 in the small cassette 5. The cassette is supported by reference pins formed on the chassis, and is abutted against the reference pins by cassette holding levers 12, 15 and cassette holding rollers 21 while being separated from the lower surface of the cassette, and is positioned and held. ing. That is, the height of the opening of the cassette holder 9 into which the cassettes 1 and 5 are inserted is made larger by the dimensions of the cassettes 1 and 5.

On the other hand, the guide groove 6 formed on the cassette 5 cannot be formed to a sufficient depth because the depth of the guide groove 6 is restricted due to the dimensional restrictions of the cassette. In such a configuration, when the insertion position of the small cassette 5 is operated with a strong insertion force in a state shifted from the normal position, the play margin of the small cassette 5 with respect to the height of the opening of the cassette holder 9 and the cassette holder 9 Due to the deformation and the like overlapping, the small cassette 5 may be inserted at a position shifted from the normal insertion position. In this state, if the lowering operation of the cassette holder 9 is performed to mount the small cassette 5 on the equipment main body, the small cassette 5 is provided on the equipment main body. The reel base, the tape guide post (not shown), etc., do not engage properly, resulting in damage to the apparatus body and the cassette.

(2) Further, as described above, the height of the cassette guide 11 is also restricted by the restriction on the depth of the guide groove 6. As a result, the effect of preventing the cassette from being erroneously inserted becomes insufficient, and when an erroneous insertion operation is performed with a strong insertion force, the cassette is mounted on the cassette guide 11 in the same manner as in the above item (1). If the cassette holder 9 is inserted and the cassette holder 9 is destroyed or the cassette is damaged, and if the cassette lowering operation is performed with, for example, erroneous insertion, the apparatus body is further destroyed.

(3) At first glance, the insertion position of the small cassette 5 is unclear, and there is a high possibility that the small cassette 5 will be inserted erroneously, causing the problem (1).

(4) The cassette case is generally formed by molding from a plastic material, and the center portion is hollow due to its structure, and the strength is weak. Further, the top plate 10 shown in the conventional example has cassette holders 12, 15, for urging the large cassette 1 and the small cassette 5 toward the chassis.
There are a total of 18 of them. In such a configuration, when the large cassette 1 is used, the cassette pressing roller 21 for pressing the upper right end of the small cassette 5 comes into contact with the vicinity of the center of the large cassette 1, and the above-mentioned weak portion of the cassette 1 is weakened. Will be pushed. For this reason, the cassette is distorted, and the guide post provided in the cassette is tilted, which affects the tape running.

(5) The lids 31 and 39 provided on the cassette are opened when the cassette is mounted on the apparatus main body. At this time, since the lids 31 and 39 are opened against the spring force for closing the lids 31 and 39, the cassette 31 Causes a force to be returned in the direction opposite to the cassette insertion direction by the spring force. It is necessary for the insertion of the cassette to be correctly inserted up to the positions of the stoppers 25, 26, and 27 as described above.If the above-mentioned symptoms occur, the cassette will be misaligned when mounted on the device body, and will not be correctly mounted. This may cause trouble in tape running and the like.

(6) In order to prevent the displacement of the cassette described in the item 5, in the conventional example, means for increasing the pressing force of the cassette pressing levers 12, 15 and the cassette pressing roller 21 against the cassette when the cassette is inserted is taken. However, in this case, the insertion load of the cassette is increased, which causes not only a feeling of operational discomfort, but also the insertion of the small cassette is not performed completely until it comes into contact with the stoppers 26 and 27. The device is mounted on the main body as it is, leading to destruction of the main body and the cassette. Further, the sliding contact between the upper surface of the cassette and the holding levers 12 and 15 causes scratches on the upper surface of the cassette, and the shavings and the like enter the main body of the apparatus, which causes a dropout of a reproduced signal.

(7) Groove 6 for guiding its insertion on the lower surface of the cassette
Is required, which not only weakens the strength of the cassette but also causes distortion of the weld from the forming surface, which greatly impairs the appearance or the processing accuracy. Further, this becomes a factor of increasing the thickness of the cassette, which is disadvantageous in external dimensions.

Means for Solving the Problems The cassette holder device of the present invention is provided with a small cassette guide member for regulating the insertion position of the small cassette in the large cassette insertion opening of the cassette holder so as to be rotatable at the top of the cassette holder, When the small cassette guide member or the large cassette is inserted, the large cassette is lifted upward by the large cassette to escape outside the large cassette insertion locus. Further, a claw portion is formed on the lower surface of the small cassette guide member so as to be engaged with a step formed on the small cassette to prevent insertion of the small cassette when it is displaced.

Further, the cassette holder device of the present invention operates the small cassette pressing roller in conjunction with the rotating member of the small cassette guide member so that the biasing force acting on the small cassette pressing roller when the large cassette is inserted does not act on the large cassette. It is what was constituted.

Further, in the cassette holder device of the present invention, the small cassette lock member is rotatably disposed on the side of the small cassette guide member which is in contact with the small cassette side surface, and the small cassette lock member is provided in the recess provided on the small cassette side when the small cassette is inserted. The lock member is engaged so that the small cassette lock member is released outside the insertion locus of the large cassette in conjunction with the rotation of the small cassette guide member when the large cassette is inserted.

According to the present invention, when a small cassette is inserted, one side of the small cassette is guided by the side wall of the cassette holder, and the other side is guided and regulated by the small cassette guide member. Is done. In this example, only one side of the small cassette is guided and regulated by the small cassette guide member. However, the small cassette guide members are arranged on the left and right sides, and both side surfaces of the small cassette are guided by the small cassette guide member. Things are also possible. When the cassette insertion operation is performed with the small cassette shifted from the normal insertion position, in the case of a slight shift, the cassette is guided to the normal position by the cassette guide taper portion on the cassette insertion side end of the small cassette guide member. In the case of a large displacement, the small cassette guide member is released upward by the front surface of the small cassette, and the small cassette starts to be inserted. The claw provided on the lower surface of the member engages with the step formed on the small cassette, and further insertion of the cassette is prevented, so that the cassette cannot be inserted. That is, the small cassette can be inserted only at the regular position.

When the large cassette is inserted, the guide opener engaged with the small cassette guide member is rotated by the front surface of the large cassette, and the rotating operation is transmitted to the small cassette guide member,
The small cassette guide member rotates to a position where it does not prevent the cassette from being inserted, thereby enabling the cassette to be inserted. In this case, since the large cassette does not have the step provided on the small cassette, it does not engage with the claw portion of the small cassette guide member, and the chamfered portion provided on the front surface of the large cassette. In addition, the guide member is released upward, making easy sliding contact with the upper surface of the cassette, and the cassette is inserted to the proper position.

Further, according to the present invention, when the small cassette is inserted, the small cassette is pressed on both sides by the holding lever and the small cassette holding roller provided for the large and small cassettes provided at the left end of the cassette holder. When the large cassette is inserted, the upper portion of the small cassette guide member is released upward by the insertion operation of the large cassette, and the small cassette holding roller configured to move in conjunction with the small cassette guide member moves to the upper surface of the cassette. The large cassette is escaped to a position where it does not contact, and the large cassette is pressed by pressing levers provided on both sides of the cassette holder.

Further, according to the present invention, at the time of completion of the insertion of the small cassette, the small cassette lock roller is engaged with the grip groove provided in the small cassette, and the cassette cover is mounted on the apparatus body and the down operation is performed. The cassette insertion position can be prevented from changing due to the opening operation or the like.

Hereinafter, the cassette holder device of the present invention will be described with reference to the drawings of the embodiments.

FIG. 1 and FIG. 2 show an embodiment of a cassette holder device configured to correspond to the two types of cassettes, large and small, and will be described below with reference to the drawings.

In the figure, 41 is a cassette holder member, 42 is a top plate, both are formed in a box shape by screws,
The cassette is configured to be insertable. 43,44,
Reference numeral 45 denotes a stopper provided on the cassette holder 41, which regulates a cassette insertion depth position. 46,4
Reference numeral 7 denotes a cassette holding lever rotatably provided on the top plate 42 by shafts 48 and 49, and is biased in the cassette direction by springs 50 and 51, respectively. Numerals 52 and 53 are erroneous insertion preventing levers configured to prevent erroneous insertion of the cassette, and are configured to be rotatable on the top plate 42 by shafts 54 and 55 and urged in the cassette direction by springs 56 and 57. ing. Further, the second erroneous insertion prevention levers 52 and 53 are provided with inclined surfaces 39-a and 39-b formed on the front lid 39 of the small cassette when the small cassette is inserted into the illustrated regular position.
It is provided so that it may be located in.

Reference numeral 58 denotes a small cassette guide member for guiding the small cassette 5 to be inserted into a proper position.
The top plate 42 is positioned at a position where the distance between the small cassette guide member 58 and the side surface 58-a is slightly larger than the small cassette width.
Is rotatably provided via a shaft 59, and is urged by a spring 60 in the cassette direction (downward). The small cassette guide member 58 is further provided with an inclined surface 58- so that even when the cassette insertion position is slightly shifted to the right in the drawing, the small cassette guide member 58 is guided to the normal position by the tapered end of the small cassette guide member 58.
b and a parallel surface portion 58-c with respect to the front surface of the cassette are formed. Further, a claw portion on the lower surface of the small cassette guide member 58 for preventing the operation of the cassette when the cassette is erroneously inserted.
58-d and an arc surface 58-e for sliding with the cassette upper surface are formed.

Reference numeral 61 denotes a small cassette pressing roller arm that is supported by the support shaft 59 of the small cassette guide member 58 described above.A roller 62 is supported by a pin 63 so as to be in contact with the upper surface of the cassette, and one end of the pin 63 is Small cassette guide member
The small cassette guide member 58 is lifted upward in conjunction with the rotation of the small cassette guide member 58 by engaging with a concave portion 58-f provided in the 58. The small cassette pressing roller arm 61 is urged by a spring 64 so that the roller 62 applies an appropriate pressing force to the cassette.

A small cassette lock roller arm 65 is rotatably urged in a direction indicated by an arrow A by a pin 66 and a spring 67 to a small cassette guide member 58, and a small cassette lock roller 68 is rotatable by a shaft 69 at one end. The rollers 68 are provided on the cassette guide surface 58 of the small cassette guide member 58.
-A.

70 is a guide opener, which is pivoted on the top plate 42
It is provided rotatably via 71 and is urged downward by a spring 72. Further, the convex portion 73 formed on the guide opener 70 is engaged with a groove portion 58-g formed on the distal end portion of the small cassette guide member 58.
Is connected so that the small cassette guide member 58 rotates upward. An opener roller 75 rotatably supported by a shaft 74 is arranged on the guide opener 70 so as to first come into contact with the front surface 31-a of the cassette at a position closest to the cassette insertion port.

The operation will be described below with reference to FIGS.
FIG. 3 shows the operation of inserting the cassette and the small cassette guide member 58.
4 shows the movement of the guide opener 70 and the small cassette holding roller arm 61. FIG. 4 shows the movement of the erroneous insertion prevention levers 52 and 53. Cassette holder 41 as shown
The opening of the cassette storage box formed by the top plate 42 and the top plate 42 is configured to be larger than the cassette thickness dimension by the interval shown in FIG. This is because when the cassette is inserted into the cassette holder 41 and mounted on the main body of the device, the cassette must be restricted to a predetermined position and height with respect to the main body of the device, so that the cassette is floated from the cassette holder 41. This is a margin.

First, the case where the small cassette is correctly inserted will be described. As shown in FIG. 1, the small cassette 5 is inserted into the cassette holder 41 at a position where the left side faces are aligned. In this case, since the small cassette 5 does not contact the opener roller 75 of the guide opener 70, the small cassette guide member 58 does not change from the position shown in FIG. 3A, that is, the state shown in FIGS. At 58-a, one side of the small cassette 5 is guided. At this time, as shown in FIG. 4A, the erroneous insertion prevention lever 52 is rotated upward by the inclined surfaces 39-a and 39-b provided on the front cover 39 of the small cassette 5, and The claw 52-a slides on the upper surface of the cassette as shown in FIG. 4B without engaging with the corner 40-a of the small cassette 5, and the stopper 52 provided on the cassette holder 41 is easily provided.
It is inserted until it comes into contact with 44,45. During this insertion operation, the small cassette lock roller 68 provided on the small cassette guide member 58 is rotated by the right side surface of the cassette against the urging spring 67, and the roller 68 is rotated by the right side wall of the cassette. While the cassette is inserted to the above-mentioned position, the cassette is engaged with the grip groove 37 provided in the cassette at the regular position by the biasing spring 67 and positioned. In this case, the claw 52-a of the erroneous insertion prevention lever 52 comes into contact with the upper surface of the cassette 5 to damage the cassette, or the abrasion of the claw 52-a or the claw may be caught by the concave or convex portion on the upper surface of the cassette. In addition to the claw 52-a, an arc-shaped convex surface 52-b is formed at the back thereof to prevent the cassette from sliding. A gap filter is formed between -a and the upper surface of the cassette.

Although omitted in the main text, the erroneous insertion prevention lever 53 has the same configuration as that of the lever 52, and it goes without saying that it operates in the same manner.

Next, a case where a large cassette is inserted will be described.
As shown in FIG. 3A, the large cassette 1 is a cassette holder.
Insertion starts from the front of 41. First guide opener
The front portion 31-a of the large cassette 1 comes into contact with an opener roller 75 pivotally supported by the guide 70, and the guide opener 70 is rotated clockwise in FIG. The portion 73 is a small cassette guide member 58
3C, the small cassette guide member 58 pivots counterclockwise in the drawing as shown in FIG. 3C, and moves upward to slide the small cassette guide member 58. Is located at a position where the front end flat portion 58-c sufficiently escapes from the cassette front portion. The large cassette 1 is located at a position shown by a two-dot chain line in FIG. 3C, and further insertion is continued, so that a chamfer-like inclined surface formed on the lid portion 31 of the large cassette 1
The lower claw portion 58-d of the small cassette guide member 58 is formed by 31-b.
The leading end slides without being locked to the large cassette 1, and the small cassette guide member 58 rotates counterclockwise in the drawing,
As shown in FIG. 3B, the cassette escapes to the upper surface of the cassette, and the insertion of the cassette is continued until the cassette comes into contact with the stoppers 43, 44, and 45.

In the above operation, the lower claw portion of the small cassette guide member 58
The height of 58-d is made smaller by the amount of chamfer provided on the lid 31 of the large cassette 1. Further, the claw 58-
An arc surface 58-e is formed behind d as shown in the figure, and the upper surface of the cassette and the small cassette guide member 58 make sliding contact.
In the state shown in FIG. 3B, the arc surface portion 58-e contacts the upper surface of the cassette, and a gap is formed between the claw portion 58-d and the upper surface of the cassette. Caught,
The construction is such that abrasion of the claws and scratching of the cassette do not occur.

Next, the operation related to this operation and the small cassette holding roller arm 61 will be described. Small cassette is a guide member
By rotating counterclockwise in FIG. 58, the small cassette pressing roller arm 61 supporting the roller 62 is rotated via a pin 63 which engages with a concave portion 58-f provided in the small cassette guide member 58. In response to this, it rotates counterclockwise in the figure against the force of the spring 64 and escapes to a position not in contact with the upper surface of the cassette as shown in FIG. 3B. In general, the cassette holding force requires a force of several hundred grams, and in the case of the conventional apparatus, the force itself acts on almost the center of the large cassette. The acting force acts via the arc surface portion 58-e of the small cassette guide member 58, and the acting force is reduced by an amount corresponding to the distance ratio from the rotation fulcrum (the shaft 59). In other words, when a large cassette is inserted, the force acting on the central portion of the cassette is 1/3 to 1/5 of the conventional example even if the acting force of the other springs 60 and 72 forming this configuration is added.
, Which is actually less than 100 grams, and can be set to a small value that does not give distortion to the cassette.

The case where the small cassette 5 and the large cassette 1 are properly inserted has been described above. However, the cassette that has been properly inserted into the cassette holder is mounted by the next operation, that is, the operation of lowering the cassette holder toward the apparatus body. Is done. The configuration for performing this operation will not be described, but can be easily performed by using a conventional link mechanism or the like.

Upon completion of the mounting of the cassette, the cassette is properly supported by the positioning member provided on the apparatus main body, and is in a state of being floated from the cassette holder as described above. The members for urging the cassette against the positioning member are cassette holding levers 46 and 47 and a small cassette holding roller arm 61, and in the case of a small cassette, the cassette holding lever 47 and the small cassette holding roller arm 61 are used. In the case of 1, it is urged by the cassette holding levers 46 and 47.

Next, a case where the small cassette 5 is inserted while being shifted from the normal insertion position will be described. First, when the small cassette 5 is slightly shifted to the right, that is, within a range (up to FIG. 1) until the small cassette 5 hits the opener roller 75 provided on the guide opener 70, the small cassette 5 The small cassette 5 is guided to the normal position by the tip inclined surface 58-b. The flat portion 58-c provided at the distal end of the small cassette guide member 58 prevents the cassette guide member 58 from being released upward by the inclined surface 39-b at the distal end of the small cassette 5 in this case. , The size of the inclined surface 39-b of the small cassette 5 is made larger. Therefore, when the small cassette 5 is inserted, the front surface 39-c of the small cassette abuts against the flat end face 58-c of the small cassette guide member 58, and the small cassette guide member 58 is not released by the insertion force of the cassette. As described above, the vehicle is guided to the normal position by the inclined surface 58-b.

Next, the operation in the case where an erroneous insertion operation is performed on the right side of the position in FIG. 1, that is, the position where the guide opener 70 is rotated by the insertion of the small cassette will be described. In this case, the small cassette guide member 58 is rotated by the insertion force of the small cassette 5 in the same manner as when the large cassette is inserted, and the insertion of the small cassette 5 is started, but as shown in FIG. The step formed by the front pig 39 and the rear pig 40 of the cassette 5, that is, the end face 40-a of the rear pig 40 is engaged with the claw 58-d provided on the lower surface of the small cassette guide member 58, At the position C in FIG. 3, the small cassette 5 is prevented from being inserted, and cannot be further inserted. Further, the erroneous insertion prevention lever 52 is also out of the range of the inclined surface 39-b of the front pig 39 of the small cassette 5, and as shown in FIG.
-A engages with the claw portion 52-a of the erroneous insertion prevention lever 52, and cooperates to prevent the insertion. That is, the small cassette 5 cannot be inserted except at the normal insertion position.

The insertion preventing levers 52 and 53 serve to prevent the cassette from being inserted in the wrong direction. As shown in FIGS. 12 and 13, both the large cassette 1 and the small cassette 5 have a chamfered portion 31 only on the front surface in the cassette insertion direction, that is, only on the lid portion.
-B or the inclined surfaces 39-a and 39-b are formed. For this reason, for example, when it is attempted to insert the cassette incorrectly in the upside down direction or the upside down direction, the claw portions 52-a of the erroneous insertion prevention lever 52 engage with the respective ridge portions of the cassette to prevent the cassette from being inserted. do.

In this embodiment, a description will be given of an embodiment in which the small cassette guide member 58 is provided at one place, that is, a case where the mounting position relationship between the large cassette and the small cassette is aligned with the left side and the front side of the cassette as shown in FIG. As described above, the present invention is effective even in the case where the cassette has a positional relationship in which the center of the cassette is aligned with the front surface in the width direction as shown in FIG. 5, for example. In this case, the small cassette guide member 58 and the guide opener are located on both sides of the cassette 5.
This can be realized by configuring each of the 70s to face each other, and a detailed description thereof will be omitted.

Also, it is apparent that the present invention is effective when three or more kinds of cassettes having different sizes are stored.

In FIG. 5, reference numeral 74 denotes a large cassette in which two tapes are wound and reels 75 and 76 are stored. Reference numeral 77 denotes a small cassette which also accommodates two reels 78 and 79. Numeral 80 is an imaginary line indicating the mounting positional relationship of the small cassette with respect to the large cassette.

FIG. 6 is a view showing a state in which the small cassette 5 is mounted on a device main body such as a VTR. That is, the front pig 39 and the rear pig 40 provided on the front surface of the small cassette 5 are shown in conjunction with the mounting operation of the cassette to the VTR by the lid opening pin 81 provided on a member (not shown) for supporting the cassette holder, for example. It is in an open state as shown in FIG. On the other hand, cassette 5
A spring 82 is provided between the front pig 39 and the cassette 5 so that the lid is always closed when not attached to the R. Therefore, the cassette 5 comes into contact with the cover opening pin 81 shown in FIG. 6, and the cassette 5 receives a force returned in the direction of arrow A in FIG. This force will be generated when the lid opening operation starts,
When the cassette is mounted, the cassette is displaced in the cassette holder 41. An arrangement for preventing this is a small cassette lock roller 68 provided on the small cassette guide member 58, the details of which are shown in FIG.

FIG. 7 is a view showing the relationship between the small cassette lock roller 68 and the small cassette grip groove 37 at the time when the small cassette is completely inserted into the cassette holder. The small cassette lock roller 68 provided on the guide member 58 is engaged so as to prevent the small cassette from being displaced.

Effects of the Invention As described above, according to the present invention, 1. The insertion position of the small cassette in the cassette tape insertion space of the cassette holder is correctly regulated, and the insertion at the wrong (displaced) position is impossible. Therefore, damage to the equipment (VTR) and cassette tape due to erroneous operation can be prevented.

2. Even if the small cassette is inserted at a position slightly shifted by the insertion position of the small cassette, it is guided to the proper position by the guide portion (introduction portion) of the small cassette guide member, so that the degree of freedom of the cassette insertion operation is increased. And operability is greatly improved.

3. Since the small cassette guide member protrudes into the cassette tape insertion space, the insertion position of the small cassette can be determined at a glance from the tape insertion slot of the cassette holder, providing a sense of security and possible operation errors. The nature is lost. Further, unnecessary explanation such as printing the cassette insertion position with an explanatory sentence becomes unnecessary.

4. Since the insertion guide is performed using the side of the small cassette, the guide groove on the bottom of the cassette can be omitted in the used cassette tape, and the strength of the cassette tape is strong. The occurrence of weld distortion is also eliminated, and a strong and highly accurate cassette tape can be realized. Also, the thickness of the cassette case does not require the bottom surface for forming the grooves, and the cassette itself can be made thin.

5.Because the pressing force of the cassette press by the cassette press lever and the cassette press roller can be made light when inserting the cassette,
The cassette can be inserted with a light force and the operation can be performed smoothly without any discomfort, so that the cassette can be securely inserted until it comes into contact with the stopper.

6. The erroneous insertion of the cassette can be reliably prevented, and the effect is not affected by variations in the thickness of the cassette, slight deformation of the cassette holder, etc., and erroneous insertion can be completely prevented. Therefore, the use of the cassette holder which leads to deformation of the cassette holder and breakage of the cassette can be prevented, and high reliability can be obtained.

7.When a large cassette is installed, no strong holding force is generated at the center of the cassette, so there is no distortion in the cassette case.
Guide posts and the like provided in the cassette case can guarantee high accuracy. Therefore, the tape running becomes stable, and the performance of the device is not deteriorated.

8. The position of the small cassette is correctly determined without changing the position of the small cassette due to the spring repulsion force when the lid of the cassette case is opened or the vibration during the lowering of the cassette holder when the cassette is mounted on the VTR. And the running position of the tape is properly maintained.

9. At the small cassette insertion completion position, a click feeling is obtained by the engagement between the cassette grip groove and the small cassette lock roller, a feeling of completion of insertion is obtained, and operability is improved.

[Brief description of the drawings]

1 shows an embodiment of the cassette holder device of the present invention, wherein A is a front view, B is a side view as viewed from the cassette insertion direction, C is a side view of a small cassette guide member, and D is a cassette holding lever portion. E is a partial front view of the small cassette, and E is a partial front view of the large cassette. FIG. 2 is a partial perspective view of a small cassette guide member used in the apparatus, and FIG.
FIGS. A, B and C are explanatory views of the operation of the small cassette guide member of the apparatus, FIGS. 4A, B and C are operational explanatory views of the erroneous insertion prevention lever of the apparatus, and FIGS. FIG. 6 is a front view showing another example of the arrangement of the large and small cassettes of the cassette holder device. FIG. 6 is a side view of the small cassette with the lid open. FIG. 7 is an engagement relationship between the grip groove of the small cassette and the small cassette lock roller. , FIG. 8 is a perspective view from the back of the large cassette, FIG. 9 is a perspective view from the back of the small cassette, and FIG. 10 is a front view showing the positional relationship between the large cassette and the small cassette in the cassette holder. FIGS. 11A, 11B and 11C are a plan view, a front view and a side view showing a conventional cassette holder device.
FIG. 12 is a perspective view from the surface of the large cassette, and FIG. 13 is a perspective view from the surface of the small cassette. 1 large cassette, 5 small cassette, 41 cassette holder, 42 top plate, 46, 47 cassette holding lever, 58 small cassette guide member, 61 small cassette holding roller arm, 65 ... Small cassette lock roller arm, 70 ... Guide opener.

Claims (4)

(57) [Claims] 1. A small cassette tape having a stepped portion having a lower front surface in the cassette insertion direction and a large cassette tape having a chamfered ridge at the front upper surface in the cassette insertion direction. A cassette holder device for storing any one of two different large and small cassette tapes, and attaching and discharging the cassette tape to and from an apparatus body, comprising: a cassette holder member for storing and holding the large cassette tape; The small cassette tape is inserted and rotatably disposed so as to protrude from the upper part of the member into the cassette insertion slot, and one side faces the side of the small cassette tape with a slight gap to regulate and guide the insertion position of the small cassette tape. A small cassette guide member, provided on the lower surface of the small cassette guide member protruding into the cassette tape insertion opening,
A claw portion engageable with a step portion of the small cassette tape, and the cassette insertion force when the large cassette tape is inserted rotates the small cassette guide member so that the claw portion escapes upward; The cassette is inserted while the lower surface (bottom surface) of the cassette guide member is in sliding contact with the upper surface of the large cassette tape, and the small cassette guide member is used when the small cassette tape is inserted. When the insertion operation is performed irregularly beyond the restricted range, the step of the small cassette tape engages with the claw of the small cassette guide member to prevent further cassette insertion. A cassette holder device, characterized in that: 2. The small cassette guide member has an arcuate convex portion formed on the lower surface thereof in the cassette insertion direction from the claw portion, and slides on the upper surface of the large cassette tape when the large cassette tape is inserted. 2. The cassette holder device according to claim 1, wherein the claw portion is brought into contact with the large cassette tape so that the claw portion has a gap with the upper surface of the large cassette tape. 3. A cassette holder device for accommodating any one of two or more kinds of cassette tapes having different sizes, and mounting and discharging the tape to and from an apparatus main body, wherein a cassette tape is inserted into a cassette tape insertion space of a cassette holder member. A small cassette guide member having a side surface facing the side surface of the small cassette tape so as to regulate and guide the insertion position of the small cassette tape, and a small cassette guide member rotatably disposed above the cassette holder member; A large cassette holding member for abutting against the upper surface of the large cassette tape at the time of insertion to urge the large cassette tape downward with an appropriate pressure, and a small member for abutting on the upper surface of the small cassette tape in the same manner when the small cassette tape is inserted. A small cassette pressing member for urging the cassette tape downward, wherein the small cassette guide member is adapted to be inserted by a large cassette tape. The small cassette guide member is configured to escape to a position where the small cassette pressing member does not contact the upper surface of the large cassette tape in conjunction with the rotating operation of the small cassette guide member. A cassette holder device characterized by the following. 4. A cassette holder device for accommodating any one of two or more kinds of cassette tapes having different sizes, and mounting and discharging the cassette tape to and from an apparatus main body, wherein a cassette tape is inserted into a cassette tape insertion space of a cassette holder member. A small cassette guide member having a side surface opposite to the side surface of the small cassette tape so as to guide and restrict the insertion position of the small cassette tape in the above, and a small cassette guide member rotatably disposed above the cassette holder member; A small cassette lock member rotatably provided on a side of the guide member facing the small cassette tape side, a part of which is engaged with a concave portion provided on the side of the small cassette tape; A spring member biasing the small cassette tape to the side thereof, and provided on the side of the small cassette tape when the insertion of the small cassette tape is completed. A part of the small cassette lock member is engaged with the concave portion, and when the large cassette tape is inserted, the small cassette lock member is moved out of the insertion locus of the large cassette tape in conjunction with the small cassette guide member. Characterized cassette holder device.