JPH0756721B2 - Cassette loading device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading apparatus used for a magnetic recording / reproducing apparatus such as a video tape recorder, and particularly applicable when several types of cassettes need to be used. is there.

2. Description of the Related Art In recent years, various types of video tape telecoders have been developed, and compatibility between mutual models has been required. For example, it ranges from large models such as stationary recording / playback devices to small models for outdoor shooting and those integrated with a camera. When the large model and the small model are classified in this way, there is a tendency that there are models having different cassette sizes even if the recording method is the same. Is required to be compatible with each other in the cassette mounting device.

An example of a conventional cassette mounting device will be described below.
In the conventional cassette loading device, when the front end of the cassette inserted into the cassette holder from the cassette insertion port contacts the cassette receiving part, the cassette receiving part slides and the cassette is completely installed when the cassette is completely inserted. Transfer to position. When removing the cassette, on the contrary, the cassette is moved from the mounting completion position to the cassette insertion port, and the cassette receiving part is forcibly slid in the middle of the path to facilitate removal of the cassette from the cassette insertion port. (For example, JP-A-59-92467).

FIGS. 8 and 9 are exploded views of the conventional cassette mounting device as described above. In this example, the first cassette having a large width and the second cassette having a smaller width than the first cassette are used. Both cassettes are ready for use. FIG. 10a is a plan view showing the positional relationship between the first cassette and the second cassette at the cassette mounting position,
FIG. B shows the first cassette and FIG. 10c shows the second cassette. In FIG. 10, reference numeral 1 is a first cassette mainly used in a stationary recording / playback apparatus, 2 is a second cassette mainly used when photographing outdoors, and the width 1 is the first cassette. It is smaller than the lateral width L of 1. Three
Is a supply-side reel of the first cassette 1, 4 is a supply-side reel of the second cassette 2, and is mounted at the same position as the supply-side reel 3 of the first cassette 1. Reference numeral 5 denotes a take-up reel of the first cassette 1, reference numeral 6 denotes a take-up reel of the second cassette 2, and a take-up side of the first cassette 1 for driving the take-up reel of the first cassette 1. The rotation of the reel stand (not shown) is driven by being transmitted to the take-up reel stand (not shown) of the second cassette 2 by a transmission mechanism (not shown). 7 is the lid of the first cassette, 8 is the second
The lid 7 of the first cassette is provided with three notches A cutout 9, B cutout 10, and C cutout 11, and the lid 8 of the second cassette is provided with B cutout 10, A B'notch 12 and a C'notch 13 are provided at positions common to the C notch 11, respectively.

Further, in FIGS. 8 and 9, 14 is a cassette holder, and 15,1
Reference numeral 6 denotes a pair of cassette receiving portions provided on a slide lever (R) 17 and a slide lever (L) 18, which are provided so as to slide while abutting against the lower surface of the cassette holder 14, and 19 is a slide lever ( R) 17 is a second cassette receiving portion that slides integrally with one of the pair of cassette receiving portions 15 of the pair. 20 is a pair of left and right side plates, 21 is a guide groove provided on the side plates for guiding the movement of the cassette holder 14,
22 is a moving means driven by a driving source (not shown), 23
Is a guide shaft implanted in the cassette holder 14, and 24 and 25 are detection switches (R) for detecting completion of insertion of the cassette by sliding the slide lever (R) 17 and the slide lever (L) 18. , Detection switch (L), 26
Is a top plate for fixing the pair of left and right side plates 20. See also Figure 11.
12A and 12B are a plan view and a side sectional view of a main part of this conventional cassette mounting apparatus, and 27 is a cassette holder.
14 is a cassette insertion slot for inserting a cassette.

The operation of the conventional cassette mounting apparatus configured as described above will be described below.

First, the case where the first cassette 1 is inserted into the cassette holder 14 will be described. The first cassette 1 inserted into the cassette holder 14 through the cassette insertion port 27 corresponds to the three notches A, B, 10 and C 11 provided on the lid 7 of the first cassette, respectively. The slide lever (R) 17 and the slide lever (L) 18 are slid by the pair of cassette receiving portions 15 and 16 and the second cassette receiving portion 19 provided in the abutting contact with the front end portion 28 of the first cassette. While inserting, it is inserted to the insertion completion position. When the first cassette 1 is inserted to the insertion completion position, the detection switch (R) 24 and the detection switch (L) 25 are turned on by the slide lever (R) 17 and the slide lever (L) 18, respectively, and the cassette holder 14 becomes The guide shaft 23 planted in the cassette holder 14 is driven by the moving means 22 while engaging with the guide groove 21, whereby the guide shaft 23 is moved and guided to the cassette mounting position. At this time, the lid 7 of the first cassette is rotated by a rotating means (not shown) while the first cassette 1 is moved to the cassette mounting position. Since the notch 9, the B notch 10 and the C notch 11 are provided, the pair of cassette receiving portions 15 and 16 and the second cassette receiving portion 19 and the lid 7 of the first cassette can rotate without contacting each other. Is possible.

When the first cassette 1 is taken out, the moving means 22
The guide shaft 23 planted in the cassette holder 14 is moved and guided in the reverse direction from the cassette mounting position to the discharge position while engaging with the guide groove 21, thereby transferring the first cassette 1 to the cassette discharge position. During the transfer, the slide lever (R) 17 and the slide lever (L) 18 are driven by a drive mechanism (not shown) so that the pair of cassette receiving portions 15 and 16 and the second cassette receiving portion 19 are moved. Push the front end 28 of the first cassette to force the first cassette 1
Can be slid in the direction of arrow A so as to push out. As a result, the first cassette 1 comes out to the cassette insertion port 27 side from the insertion completion position in the cassette holder 14,
It becomes easier to take out the cassette 1 from the cassette insertion port 27.

Next, a case where the second cassette 2 having a smaller width (l <L) than the first cassette 1 is inserted into the cassette holder 14 will be described. Cassette holder 14 from cassette insertion slot 27
The second cassette 2 inserted into the cassette holder 14 is guided to a predetermined position in the cassette holder 14 by a cassette guide (not shown). The second cassette receiving portion 19 and one of the pair of cassette receiving portions 16 are B ′ provided on the lid 8 of the second cassette.
Since the notches 12 and C ′ notches 13 are provided so as to correspond to each other, the front end portion 29 of the second cassette abuts the second cassette receiving portion 19 and one of the pair of cassette receiving portions 16. Since the second cassette receiving portion 19 is provided on the slide lever (R) 17 integrally with one of the pair of cassette receiving portions 15, the second cassette 2 has the slide lever (R) 17 and Slide lever (L) 18
It is inserted to the insertion completion position while sliding. When the second cassette 2 is inserted to the insertion completion position, the detection switch (R) 24 and the detection switch (L) are moved by the slide lever (R) 17 and the slide lever (L) 18 as in the case of the first cassette 1. ) 25 each, cassette holder 14
Is guided to the cassette mounting position. At that time, the second
The cassette lid 8 is rotated by a rotating means (not shown) while the second cassette 2 is moved to the cassette mounting position. The second cassette lid 8 has B'notches 12, C. Since the notch 13 is provided, the second cassette receiving portion 19 and one of the pair of cassette receiving portions 16 and the lid 8 of the second cassette can be rotated without contact. When the second cassette 2 is taken out, the moving means 22 guides the guide shaft 23 implanted in the cassette holder 14 in the reverse direction from the cassette mounting position to the cassette discharging position while engaging with the guide groove 21. As a result, the second cassette 2 is transferred to the cassette ejection position. During the transfer, the slide lever (R) 17 and the slide lever (L) 18 are moved in the same manner as in the case of the first cassette 1. It is slid in the arrow A direction by a drive mechanism (not shown). At this time, the second cassette 2 is one of the pair of cassette receiving portions.
The second cassette receiving portion 19 and one of the pair of cassette receiving portions 16 provided integrally with 15 are the front end portion of the second cassette.
It is forced out by pressing 29. as a result,
A second cassette 2 having a smaller width than the first cassette 1.
In this case, the second cassette 2 is pushed toward the cassette insertion port 27 side from the insertion completion position into the cassette holder 14 by being pushed by the force evenly left and right, and the second cassette 2 is inserted into the cassette insertion port 27. It becomes easy to take out from.

However, with the above-mentioned configuration, the third cassette for a stationary model, which does not particularly consider direct compatibility with a small cassette dedicated to a model for outdoor shooting, is provided. However, there is a problem that it cannot be used even if it has substantially the same shape as the first cassette 1. The third cassette shown in FIG. 13 will be described below.

In FIG. 13, reference numeral 30 denotes a third cassette, which has the same lateral width L as the lateral width L of the first cassette 1 and has an outer shape substantially the same as the outer shape of the first cassette 1. Reference numeral 31 is a lid of the third cassette, and a D notch 32 and an E notch 33 are provided at positions corresponding to the pair of cassette receiving portions 15 and 16, but at a position corresponding to the second cassette receiving portion 19. Has no cutout. Therefore, when the third cassette 30 is inserted into the cassette holder 14 through the cassette insertion port 27 as shown in FIGS. Since the notch is not provided at a position corresponding to the second cassette receiving portion 19, the cassette lid 31 of the second cassette abuts the second cassette receiving portion 19, so that the third cassette 30 is placed in the cassette holder 14. It cannot be inserted all the way to the insertion completion position. Therefore, the slide lever (R) 17 and the slide lever (L) 18 are reached until the pair of cassette receiving portions 15 and 16 and the second cassette receiving portion 19 contacting the front end portion 34 of the third cassette reach the insertion completion position. By sliding the switch, the detection switch (R) 24 and detection switch (L) 2
The detection switch (R) 24 may be turned on by the insertion of the third cassette 30 in order to detect the completion of the insertion of the cassette for the first time when 5 is entered, but the detection switch (L) 25
And the cassette holder 14 does not move. Also, detection switch (R) 24, detection switch (L) 25
Even if the cassette holder 14 starts to move when the
Since the lid 31 of the cassette is in contact with the second cassette receiving portion 19, it cannot be rotated by the rotating means (not shown), and the third cassette 30 can move to the cassette mounting position. There is a problem in that it cannot be performed and the operation is stopped in the middle of the operation, and as a result, the cassette mounting device may be damaged or the lid 31 of the third cassette may be damaged. Also, at this time, if the second cassette receiving portion 19 is deleted, the third cassette 30 can be used, but one of the pair of cassette receiving portions can be used when the second cassette 2 is inserted into the cassette holder 14. Only 16 will receive the front end 29 of the second cassette, and the second cassette 2
Is not fixed at a predetermined insertion completion position in the cassette holder 14, and the detection switch (R) 24 is not turned on. Even if only the detection switch (L) 25 is operated and the second cassette 2 is mounted, when the second cassette 2 is taken out, one of the pair of cassette receiving portions is used.
Only 16 will push the front end 29 of the second cassette,
Since a force in the rotation direction is applied to the second cassette 2, the second cassette 2 cannot be pushed out in parallel in the cassette holder 14, which causes an unexpected operation. For the above reasons, it is impossible to delete the second cassette receiving portion 19.

In view of the above problems, the present invention prevents the lid of the third cassette from coming into contact with the second cassette receiving portion even when the third cassette is inserted into the cassette holder, and when the second cassette is inserted. At the insertion completion position of the second cassette, the sliding of the second cassette receiving portion stops, and not only the first cassette and the second cassette but also the third cassette can be used without using an adapter or the like. A device is provided.

Means for Solving the Problems In order to solve the above-mentioned problems, a cassette mounting apparatus of the present invention comprises a front end portion of a first cassette to be inserted into a cassette holder, and a second end shorter than a width of the first cassette. A first cassette receiving portion that abuts on both front ends of the cassette;
The second cassette receiving portion has a second cassette receiving portion that abuts only on a front end portion of the second cassette and a third cassette receiving portion that abuts only on a front end portion of the first cassette. And the third cassette receiving portion are integrally slidably provided, and when the insertion of the first or second cassette into the cassette holder is completed, the second cassette receiving portion and the third cassette receiving portion are inserted. A cassette mounting device configured to stop the slide of the cassette receiving portion and be positioned, wherein the second cassette receiving portion is located at a constant distance in the insertion direction of the cassette holder from the third cassette receiving portion. And the second cassette receiving portion is integrated when the second cassette receiving portion is located at the cassette insertion completion position when the second cassette is inserted into the cassette holder. Sliding between the set receiving portion and the third cassette receiving portion is stopped, and when the first cassette is inserted into the cassette holder, the third cassette receiving portion is integrated when the third cassette receiving portion is located at the cassette insertion completion position. In addition, the sliding of the second cassette receiving portion and the third cassette receiving portion is stopped.

The present invention has the above-described structure, and when the second cassette is inserted into the cassette holder, the second cassette receiving portion slides to the insertion completion position of the second cassette and then stops.
When the second cassette receiving portion is inserted into the cassette holder, the pair of cassette receiving portions are slid to the insertion completion position of the third cassette and stopped, whereby the second cassette receiving portion moves to the third cassette receiving portion.
Since the second cassette receiving portion can be rotated without contacting the lid of the third cassette, the second cassette receiving portion can be pivoted without contacting the lid of the third cassette. Not only the cassette but also the third cassette can be used without any trouble.

Example Hereinafter, a cassette mounting apparatus according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a cassette mounting device according to a first embodiment of the present invention, and FIGS. 2 and 3 are a plan view and a front view of a main part of the same embodiment, respectively. . The same components as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, reference numeral 41 denotes a slide lever (R) provided so as to slide while abutting on the lower surface of the cassette holder 14. The slide lever (R) 41 is provided with a cassette receiving portion 16 of a slide lever (L) 18 and a cassette. A receiving portion 42 is provided. Reference numeral 43 denotes a second cassette receiving portion that slides integrally with one of the pair of cassette receiving portions 42, 16 provided on the slide lever (R) 41. , 16 is provided so as to be located on the back side by a constant distance. Further, 44 is a second detection switch provided so as to be located at a certain distance front side from the detection switch (R) 24, 45 is a cassette discrimination lever, and 46 is a cassette discrimination switch. The cassette discriminating lever 45 is rotatably held by a discriminating lever support shaft 47 that is planted in the cassette holder 14, and is biased in the arrow A direction by a biasing spring (not shown) to move the second disc on the cassette holder 14.
Of the cassette 2.

The cassette discriminating switch 46 is a convex portion of the cassette discriminating lever 45.
It is fixed to the cassette holder 14 so as to come into contact with 48, and is turned off when the cassette discrimination lever 45 is biased in the arrow A direction, and the cassette discrimination lever 45 rotates in the arrow C direction. The position is adjusted so that it will be turned on. Then, the stopper portion 49 is attached to the slide lever (R) 41 at a position where it comes into contact with the cassette discrimination lever 45 when the slide lever (R) 41 slides while the cassette discrimination lever 45 is biased in the direction of arrow a. Is formed at the front end portion of the second cassette 2 when the second cassette 2 is completely inserted into the cassette holder 14.
The slide lever (R) 41 is positioned so as to stop sliding when the cassette receiving portion 43 is positioned. In addition, the slide lever (R) 41 has a detection switch (R) 24
Also, a shutter portion 50 for passing the second detection switch 44 is provided, the second cassette 2 is completely inserted into the cassette holder 14, and the slide lever (R) 41 slides on the cassette discrimination lever 45. The shutter portion 50 and the second detection switch 44 are positioned so that the second detection switch 44 is passed when the stopper portion 49 is stopped by coming into contact with it.
Is provided. When the first cassette 1 is inserted into the cassette holder 14, the cassette discriminating lever 45 is pushed down by the lower surface of the first cassette 1 in the arrow C direction, so that the slight lever (R) 41 has the stopper portion 49 for discriminating the cassette. The first cassette 1 can slide without contacting the lever 45, and
The shutter switch 50 is located at a position where the shutter part 50 passes the detection switch (R) 24 when the insertion is completed.
Is provided.

The operation of the cassette mounting apparatus of this embodiment constructed as above will be described below.

FIG. 4 is a side sectional view of the main part of the cassette mounting apparatus of this embodiment. First, the case where the second cassette 2 is inserted into the cassette holder 14 will be described.

The second cassette 2 inserted into the cassette holder 14 through the cassette insertion port 27 is guided to a predetermined position inside the cassette holder 14 by a cassette guide (not shown). The second cassette receiving portion 43 and the cassette receiving portion 16 are provided so as to correspond to the B'notch 12 and the C'notch 13 provided in the lid 8 of the second cassette, respectively. The front end portion 29 of the abuts the second cassette receiving portion 42 and the cassette receiving portion 16. Then, the second cassette 2 is inserted to the insertion completion position while sliding the slide lever (R) 41 and the slide lever (L) 18 integrated with the cassette receiving portion 42. At this time, when the second cassette receiving portion 43 is located at the position of the front end portion 29 of the second cassette 2, the stopper portion 49 of the slide lever (R) 41 is moved to the cassette discriminating lever 45.
Since the stopper portion 49 is formed so as to come into contact with the cassette discrimination lever, the cassette discrimination lever remains biased in the direction of arrow a.
Stopper 49 contacts 45 and slide lever (R)
The sliding of 41 stops at the position where the second cassette 2 is completely inserted into the cassette holder 14. Then, at that time, the shutter portion 50 of the slide lever (R) 41 passes through the second detection switch 44. The shutter portion 51 of the slide lever (L) 16 has a detection switch (L) 25 when the second cassette 2 is completely inserted, as in the case of the conventional cassette mounting device.
Pass through. Then, since the cassette discriminating lever 45 is still biased in the direction of arrow A, the cassette discriminating switch
46 remains off. Accordingly, at this time, the detection switch (L) 25 and the second detection switch 44 are turned on so as to detect the completion of the insertion of the cassette, so that the cassette holder 14 has the guide shaft embedded in the cassette holder 14. 23 is moving means while engaging with the guide groove 21.
It is moved to the cassette mounting position by being driven by 22. At this time, the lid 8 of the second cassette is pivoted by the pivoting means (not shown) while the second cassette 2 moves to the cassette mounting position. Since the B ′ notch 12 and the C ′ notch 13 are provided, the second cassette receiving portion 43, the cassette receiving portion 16 and the second cassette receiving portion 43 are provided.
It is possible to rotate without contacting the lid 8 of the cassette.

Next, when the second cassette 2 is taken out, the guide shaft 23 planted in the cassette holder 14 by the moving means 22 engages with the guide groove 21 and moves in the opposite direction from the cassette mounting position to the cassette discharging position. As a result, the second cassette 2 is transferred to the cassette ejection position. During the transfer, the slide lever (R) 41 and the slide lever (L) 18 are moved to the second position by a drive mechanism (not shown). The cassette receiving portion 43 and the cassette receiving portion 16 are slid in the arrow A direction so as to push the front end portion 29 of the second cassette and forcibly push out the second cassette 2. As a result, the second cassette 2 comes to the cassette insertion port 27 side from the insertion completion position in the cassette holder 14, and the second cassette 2
Can be easily taken out from the cassette insertion port 27.

Next, a case where the third cassette 30 is inserted into the cassette holder 14 will be described.

The third cassette 30 inserted into the cassette holder 14 from the cassette insertion port 27 has a cassette receiving portion 42 provided at a position corresponding to the D notch 32 and the E notch 33 provided on the lid 31 of the third cassette. When 16 contacts the front end 34 of the third cassette, the slide lever (R) 41 and the slide lever (L) 18 are slid to be inserted to the insertion completion position. At this time, the lid 31 of the third cassette is not provided with a notch at a position corresponding to the second cassette receiving portion 43,
Since the second cassette receiving portion 43 is provided integrally with the slide lever (R) 41 at a position on the inner side of the cassette receiving portions 42, 16 by a predetermined distance, the second cassette receiving portion 43 and the second cassette receiving portion 43 are
It does not come into contact with the cassette receiving portion 43.

Further, since the cassette discriminating lever 45 is rotated in the arrow C direction by the lower surface of the third cassette 30, the stopper portion 49 does not come into contact with the cassette discriminating lever 45, and the insertion completion position of the third cassette 30 is reached. The slide lever (R) 41 is slidable until one of the pair of cassette receiving portions 42 is located at the position of the front end portion 34 of the third cassette in FIG. At this time, the shutter portion 50 of the slide lever (R) 41 passes the detection switch (R) 24. The shutter portion 51 of the slide lever (L) 16 passes through the detection switch (L) 25 when the insertion of the third cassette 30 is completed, as in the case of inserting the second cassette 2. Then, the cassette discriminating lever 45 is turned in the arrow C direction to turn on the cassette discriminating switch 46. At this time, the detection switch (L) 25 and the detection switch (R) 24 are turned on to insert the cassette. By detecting the completion, the cassette holder 14 is driven by the moving means 22 while the guide shaft 23 embedded in the cassette holder 14 is engaged with the guide groove 21, and the cassette mounting position is set. Moved to. At that time, the lid 31 of the third cassette is rotated by a rotating means (not shown) while the third cassette 30 moves to the cassette mounting position. The D notch 32 and the E notch 33 are provided, and as shown in FIG. 4, the second cassette receiving portion 43 is provided at a position where it does not contact when the lid 31 of the third cassette rotates. The third cassette lid 31 includes a second cassette receiving portion 43 and a pair of cassette receiving portions 42,1.
It is possible to rotate without contacting with 6. When the third cassette 30 is taken out, the moving means 22 guides the guide shaft 23 planted in the cassette holder 14 in a reverse direction from the cassette mounting position to the cassette discharging position while engaging with the guide groove 21. As a result, the third cassette 30 is transferred to the cassette ejection position. During the transfer, the slide lever (R) 41 and the slide lever (L) 18 are driven by the drive mechanism to receive the cassette receiving portions 42, 16 And the second cassette receiving portion 43 is the front end portion of the third cassette.
It is slid in the direction of arrow A so that the third cassette 30 is pushed out by pushing 34. As a result, the third cassette 30 comes out of the cassette insertion port 27 side from the insertion completion position in the cassette holder 14, and the third cassette 30 can be easily taken out from the cassette insertion port 27.

The case where the first cassette 1 is inserted into the cassette holder 14 is exactly the same as the case where the third cassette 30 is used, and the description thereof is omitted.

As described above, according to this embodiment, when the insertion of the first cassette into the cassette holder is completed, the second cassette receiving portion causes the front end of the second cassette at the insertion completion position of the second cassette into the cassette holder. Even if the third cassette is inserted in the cassette holder, it is provided so as to be located at a certain distance behind the position of the section, and the lid of the third cassette and the second cassette are inserted.
The second cassette receiving portion is configured so that the second cassette receiving portion stops sliding at the insertion completion position of the second cassette when the second cassette is inserted. Not only the cassette and the second cassette, but also the third cassette dedicated to the stationary recording and reproducing device can be used without using an adapter or the like.

FIG. 5 is an exploded perspective view of the cassette mounting device according to the second embodiment of the present invention. The same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. The difference from the configuration of FIG. 1 is that a detection switch 63 for detecting the completion of insertion of the cassette by the passage of the shutter portion 62 of the slide lever (R) 61 is provided. FIGS. 6A and 6B and FIGS. 7A and 7B are a plan view and a front view of a main part of the cassette mounting apparatus according to the second embodiment of the present invention. The shutter portion 62 of the slide lever (R) 61 is provided with a shutter A 64, a notch portion 65, and a shutter B 66. When the first cassette 1 and the third cassette 30 are inserted into the cassette holder 14, the detection switch 63 Is configured so that the shutter A64, the notch portion 65, and the shutter B66 pass therethrough, and the slide lever (R) 61 stops sliding at the position where the shutter B66 passes the detection switch 63. At that time, the first cassette 1 and The third cassette 30 is configured to be completely inserted. When the second cassette 2 is inserted into the cassette holder 14, the detection lever 63 is moved to the slide lever (R) 61 at the position where the shutter A64 has passed. The formed stopper portion 67 comes into contact with the cassette discriminating switch 45 so that the slide lever (R) 61 stops sliding, and at that time, the second cassette 2 is inserted. It is configured to be Ryo.

In the cassette mounting apparatus according to the second embodiment of the present invention configured as described above, when the cassette discriminating switch 46 is on, that is, the first cassette 1 and the third cassette 30 are inserted into the cassette holder 14. Sometimes, the detection switch (L) 25 is moved to the shutter part of the slide lever (L) 18.
51 is passing and the detection switch 63 is set to shutter A6.
The completion of the insertion of the cassette is detected by passing twice through 4 and the shutter B66, and when the cassette discrimination switch 46 is off, that is, when the second cassette 2 is inserted into the cassette holder 14, the detection switch ( L) 25
When the shutter 51 of the slide lever (L) 18 is passing through and the detection switch 63 is passed only by the shutter A 64 once, the completion of the insertion of the cassette is detected. It is possible to use not only the first cassette 1 and the second cassette 2 but also the third cassette 30 in exactly the same manner as in the above embodiment.

As described above, the shutter portion of the slide lever (R) is provided with the shutter A, the notch portion, and the shutter B, and when the first cassette and the third cassette are inserted into the cassette holder, the detection switch is set to the shutter A, the notch portion. , The shutter B is allowed to pass, and when the second cassette is inserted into the cassette holder, the detection switch is configured so that the sliding of the slide lever (R) is stopped at the position where the shutter A has passed. In addition to the detection switch (R) that detects the completion of insertion of the cassette and the third cassette, the second switch
No separate second detection switch for detecting the cassette of
Not only the third cassette but also the completion of insertion of the second cassette can be detected, and a very space-saving design can be achieved.

As described above, according to the present invention, at least one of the pair of cassette receiving portions that receives the front end portion of the first cassette and the second cassette receiving portion.
In the cassette mounting apparatus in which the second cassette receiving portion for receiving the front end portion of the cassette is integrally slid and positioned, when the first cassette is completely inserted into the cassette holder, the second cassette receiving portion The second cassette is inserted into the cassette holder so that the second cassette is positioned so as to be positioned at a certain distance from the front end position of the second cassette when the second cassette is inserted. By configuring the second cassette receiving portion to stop sliding in the above, not only the first cassette and the second cassette having a smaller width than the first cassette,
Further, it is possible to obtain an excellent effect that the third cassette can be used without using an adapter or the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a cassette mounting device according to a first embodiment of the present invention, FIGS. 2A and 2B and FIGS. 3A and 3B are a main part plan view and a main part front view, respectively. FIG. 4 is a sectional view of the main part of the same embodiment, FIG. 5 is an exploded perspective view of a cassette mounting device according to the second embodiment of the present invention, FIGS. 6A, 6B and 7A, B.
Is a plan view of a main part, a front view of the main part, FIG. 8 and FIG.
FIG. 10 is an exploded perspective view of a conventional cassette mounting device, FIG. 10A is a plan view of a first cassette and a second cassette, and FIGS.
11A and 11B are a perspective view of a conventional cassette mounting device, FIG. 11A is a perspective view of a third cassette, and FIG. 13A is a perspective view of a third cassette. 1A and 1B are a plan view and a side view of a main part of a conventional cassette mounting device. 1 ... First cassette, 2 ... Second cassette, 3 ...
Third cassette, 14 ... Cassette holder, 16, 42 ... Cassette receiving portion, 28 ... Front end portion of first cassette, 29 ...
Front end of the second cassette, 34 ... Front end of the third cassette, 43 ... Second cassette receiving portion.

Claims (1)

[Claims] 1. A front end portion of a first cassette to be inserted into a cassette holder, and a second end which is shorter than the first cassette in width.
First cassette receiving portion that comes into contact with both front ends of the cassette, a second cassette receiving portion that comes into contact only with the front end of the second cassette, and comes into contact only with the front end of the first cassette A third cassette receiving portion, wherein the second cassette receiving portion and the third cassette receiving portion are integrally slidably provided, and the first or second
When the cassette of is completely inserted into the cassette holder,
A cassette mounting device configured such that sliding of the second cassette receiving portion and the third cassette receiving portion is stopped and positioned, wherein the second cassette receiving portion is the third cassette receiving portion. Is provided so as to be positioned on the back side by a certain distance in the insertion direction into the cassette holder, and when the second cassette is inserted into the cassette holder, the second cassette receiving portion is located at the cassette insertion completion position. The second cassette receiving portion and the third cassette receiving portion, which are sometimes integrated, stop sliding, and when the first cassette is inserted into the cassette holder, the third cassette receiving portion completes the insertion of the cassette. A cassette mounting device configured to stop sliding of the second cassette receiving portion and the third cassette receiving portion that are integrated when positioned at a position.