JPH0721643A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent malfunction or damage of a mechanism by making the position of the back end of a cassette at the time of starting to pull-in the cassette become constant independent of the kind of cassettes when the cassette in different size are inserted. CONSTITUTION:When the small cassette 33 is inserted to a cassette holder 10 from a cassette inserting window 8 of an outside case member 9, the cassette 33 is never brought into contact with a cassette detecting lever 27 since the horizontal width of the cassette is narrow. Therefore, a switch 29 for detecting cassette size does not perform the changeover operation. The cassette 33 is further inserted, and at the time when the back end 33a of cassette is attained to the position almost coincident with that of the cassette inserting window 8, a lever 30 for detecting cassette insertion is operated for turning by the cassette holder 10 to changeover a switch 32 for detecting cassette insertion. At this time point, the insertion of the small cassette is discriminated. Next, when the large cassette 34 is inserted, the switch 29 is changed over by the lever 27, therefore, the insertion of the large cassette is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device in which two or more types of cassettes having different sizes can be used by one mechanism (cassette; cassette component).

[0002]

2. Description of the Related Art Conventionally, FIG. 8 and FIG. 9 show a cassette loading device which can use cassettes of different types and different sizes.
The schematic of the insertion part of a cassette from which size differs, respectively is shown.

In both figures, reference numeral 41 is a mechanical chassis,
42 is a cassette holder in which the cassette is mounted, 43 is an exterior member of the cassette computer, 44 is a cassette insertion detection lever for detecting the insertion of the cassette into the cassette computer, 45
Is a detection switch operated by the rotating operation of the detection lever 44.

Referring to FIG. 8 as an example, when a small cassette 46 is inserted through the insertion window 43a of the exterior member 43, it is mounted on the cassette holder 42 waiting in the cassette computer. Then, the cassette 46 is further pushed so that the rear end of the cassette is inserted into the insertion window 43a of the exterior member 43.
When it comes to the vicinity of, the cassette holder 42 rotates the cassette detection lever 44 to switch the detection switch 45 to switch the signal.

After that, the cassette holder 42 is driven by a cassette motor connected by a gear (not shown) to guide grooves 48a, 4a formed in the frame 48.
8a, the cassette 46 is lowered to the loading position.

Next, as shown in FIG. 9, a large cassette 4
When 7 is used, the signal of the detection switch 45 is switched in a state of protruding from the exterior member 43 by the length of the cassette. In this case, since there is no means to detect the type of cassette and that the rear end of the large cassette has reached the position of the exterior member, it is necessary to energize the cassette motor in this position and electrically pull the cassette into the cassette. Become.

That is, at the timing when the cassette is electrically pulled in, the position of the rear end of the cassette projects from the exterior member 43 by the difference in the size of the cassette.

[0008]

As described above, when the position at which the cassette starts to be drawn into the cassette by the electric operation differs depending on the size of the cassette, the position at which the cassette starts to move is set to the position at which the smallest cassette is drawn. Need to match. For example, when this position is aligned with the exterior member 43 and the rear end of the cassette 46 as shown in FIG. 8, the large cassette 47 starts to move from the exterior member 43 by the difference in the size of the cassette as shown in FIG. It will be the position where it jumps out.

Accordingly, when the cassette is electrically pulled in from here, the cassette can be grasped by hand, so that the cassette can be forcibly pulled out against the movement of the electrically driven cassette. As a result, there is a possibility that an unreasonable force is applied to the cassette computer mechanical unit, and malfunction or damage to the mechanical unit is likely to occur.

Further, in a model that uses only one type of conventional cassette (for example, VHS system),
Most of the electric devices start to draw in when the rear end of the cassette almost coincides with the position of the exterior member, so compared to that, if the cassette starts to move electrically far before the exterior member, it feels strange. The feeling of operation deteriorates.

The present invention has been made in order to solve the above-mentioned problems, and when the cassettes of different sizes are inserted, the position of the rear end of the cassette which starts to be pulled in electrically is substantially the same as the exterior member. It is an object of the present invention to obtain a cassette loading device that can be performed from.

[0012]

In order to achieve the above-mentioned object, a cassette loading device according to the present invention is a cassette loading device capable of inserting and ejecting two or more different size cassettes by electric means. A first detection member that detects the size of the cassette, a first switch that is operated by the first detection member, and a second detection member or a second switch that detects that the cassette is inserted. And a third switch for detecting the position at which the rear end of the cassette is inserted or a detection means in place of the third switch for each size of the cassette, and when a cassette of a different size is inserted, the electric means is used. The position of the rear end of the cassette when the cassette is pulled in is made constant near the cassette insertion window regardless of the type of the cassette.

Further, the cassette loading apparatus according to the present invention is
The detection of the size of the cassette detects the width of the cassette.

The cassette loading device according to the present invention is
The detection means for detecting the rear end position of the cassette is performed by detecting the rotation angle of the capstan motor.

Further, the cassette loading device according to the present invention is
The detecting means for detecting the rear end position of the cassette is performed by the rotation detecting means provided in the transmission gear of the electric means for loading the cassette.

Further, the cassette loading device according to the present invention is
The detection means for detecting the rear end position of the cassette is a switch which is switched by a detection member for detecting the size type of the cassette.

Further, the cassette loading device according to the present invention is such that the position of the rear end of the cassette at the time of starting to draw the cassette by the electric means is constant at a position substantially corresponding to the exterior member having the cassette insertion window. is there.

[0018]

In the cassette loading apparatus of the present invention constructed as described above, the determination of the size of the cassette is detected by the first detection member and the first switch, and the small rear end of the cassette is inserted at the end position. The detection is performed by the second detection member and the second detection switch, and the detection of the position where the large rear end of the cassette is inserted is performed by the third switch or a detection means in place of it.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cassette loading apparatus according to the present invention will be described below with reference to the drawings shown in the embodiments. FIG. 1 is a perspective view of a cassette loading device according to this example, FIG. 2 is an exploded perspective view of the cassette loading device, and FIG. 3 is a sectional view of a loading portion of the cassette loading device.

In each drawing, reference numeral 1 is a mechanical chassis, frames 2 and 3 are provided on both sides of the mechanical chassis 1, and two parallel guide grooves 2a and 3a are formed in both frames 2 and 3, respectively. The other ends of the guide grooves 2a and 3a are bent downward. The drive sliders 4 and 5 are provided on the outer side surfaces of the frames 2 and 3, respectively.
Numeral 5 is the horizontal holes 4b and 5b, and the axial pins 6 and 7 are inserted through the elongated holes 2b and 3b formed in the frames 2 and 3, respectively, which correspond to the mechanical chassis described above. By fixing it to 1, the drive sliders 4 and 5 can be slid in the front-back direction.

An exterior member 9 having a cassette insertion window 8 is provided on the front surface of the mechanical chassis 1. Reference numeral 10 denotes a cassette holder. Two pins 11 and 12 provided on both sides of the cassette holder 10 are penetrated into the guide grooves 2a and 3a of the frames 2 and 3, and the drive slider 4 and
It is engaged with the guide grooves 4a, 5a formed in the No. 5.

Further, rack portions 13 and 14 are formed on the upper edges of the drive sliders 4 and 5, and these rack portions 13 and 14 are formed.
Drive gears 16 and 17 provided at both ends of one shaft 15 supported by the frames 2 and 3 mesh with each other. This axis 1
5 is provided with another gear 18 near one drive gear 16, and the reduction gear groups 19a, 19b, 19 are provided to this gear 18.
c and the bevel gear 19d are engaged in this order, and the reduction mechanism 19
Are configured.

Of the reduction gear group, the reduction gears 19a,
19b and 19c are supported by respective shafts 19a ', 19b' and 19c 'provided on one frame 2, and the bevel gear 19d is supported by a shaft 19d' provided on the chassis 1 and a flat gear 19e of the bevel gear 19d. Are arranged on the back side of the chassis 1.

Reference numeral 20 is a capstan provided on the chassis 1, 21 is a capstan motor, and a rotation detection element (FG element) is mounted on the capstan motor 21. Reference numeral 22 is a gear directly connected to the capstan motor 21.

On the back surface of the chassis 1, there is provided a switching gear 24 composed of two meshing gears 24a and 24b supported by a link 23, and one gear 24a is supported by a spindle 24a 'provided on the frame 1. , This gear 2
4a meshes with the above-described spur gear 19e of the reduction gear, and the switching arm 26 supported by the support shaft 26a provided on the frame 1 is engaged with the shaft pin 25 of the other gear 24b. It is possible to swing by the operation of the switching cam, and the gear 24b of the switching gear 24 can be engaged with and disengaged from the gear 22 of the capstan motor 21 described above.

On the other hand, a cassette size detection lever 27 as a first detection member is provided in the inner surface portion of the frame 3 in the vicinity of the exterior member 9 so as to be rotatable around a support shaft 28. The cassette size detection lever 27 is for detecting the size of the cassette, for example, the width of the cassette to detect the size of the cassette. When a small cassette is inserted from the cassette insertion window 8,
This cassette does not come into contact with the detection lever 27, and when a large cassette is inserted through the cassette insertion window 8, the cassette comes into contact with the detection lever 27 to rotate it, and the operation piece 27 a provided on the detection lever 27. Thus, the cassette size detection switch 29, which is the first switch on the chassis 1, can be switched.

A cassette insertion detection lever 30, which serves as a second detection member, is provided on the inner surface of the frame 2 at the back of the cassette holder 10 so as to be rotatable about a fulcrum shaft 31. This cassette insertion detection lever 30 is for detecting the insertion of a cassette into the cassette regardless of the size of the cassette. When the cassette is inserted into the cassette holder 10 and is pushed into the cassette holder, the cassette holder 10 contacts the cassette insertion detection lever 30 to rotate the cassette insertion detection lever 30,
The operation piece 30a is used to switch the cassette insertion detection switch 32 which is the second switch on the chassis 1.

Moreover, this cassette insertion detection lever 30
When a small cassette is inserted into the cassette holder 10 and pushed into the cassette holder, the cassette holder 10 rotates the cassette insertion detection lever 30 when the rear end of the cassette substantially coincides with the cassette insertion window 8 of the exterior member 9. It is located in a position.

Here, in the manual movement operation of the cassette holder 10, the pins 11 and 12 provided on both sides of the cassette holder 10 move along the guide grooves 2a and 3a formed in the frames 2 and 3, and the driving slider 4 and 5 is driven.
Therefore, the drive gears 16 and 17 and the gear 18, which mesh with the rack portions 13 and 14 by the drive of the drive sliders 4 and 5, and the reduction gear groups 19a, 19b, 19c and 19 respectively.
It is transmitted to the switching gear 24 via d, and the capstan motor 21 is rotated from the switching gear 24 via the gear 22. When the capstan motor 21 is rotationally driven, the cassette holder 10 is electrically retracted through the transmission path opposite to that described above, and the cassette holder 1 is driven.
0 can be moved to the loading position.

Next, the operation of the cassette loading device according to the present invention will be described. First, the case of loading a small cassette will be described with reference to FIG. 3. When the small cassette 33 is inserted into the cassette holder 10 through the cassette insertion window 8 of the exterior member 9, the cassette 33 has a narrow width, and thus the cassette size detection lever 27. Without touching,
The cassette size detection switch 29 does not switch. With the cassette 33 inserted in the cassette holder 10, the cassette 33 is further inserted, and the cassette rear end 33
When a is inserted to a position substantially matching the cassette insertion window 8, the cassette holder 10 rotates the cassette insertion detection lever 30 to switch the cassette insertion detection switch 32. At this time, the cassette size detection switch 29 that does not switch and the cassette insertion detection switch 32 that switches do determine that a small cassette has been inserted into the cassette.

The capstan motor 21 is rotationally driven by the discrimination signals from the two switches 29 and 32, and the switching gear 24, the reduction gear groups 19a to 19d, the driving gear 16,
Cassette holder 1 via 17 and drive sliders 4 and 5
0 is electrically drawn along the guide grooves 2a and 3a, and the cassette 33 is positioned at the loading position.

When recording or playing a cassette,
The switching gear 24 is configured to be disengaged from the gear 22 of the capstan motor 21 by the operation of a mode switching cam or the like (not shown).

Next, the case of loading a large cassette is shown in FIG.
The large cassette 34 will be described with reference to FIG.
When the cassette 34 is inserted into the cassette holder 10 through the cassette insertion window 8, the horizontal width of the cassette 34 makes contact with the cassette size detection lever 27 and the cassette size detection lever 29 is switched, so that a large cassette has been inserted. To be detected. When the cassette 33 is further inserted with the cassette 34 inserted in the cassette holder 10, the cassette holder 10 switches the cassette insertion detection switch 32 via the cassette insertion detection lever 30.

However, in this position the large cassette 34
Then, the rear end thereof is in a state of largely protruding from the exterior member 9. Therefore, in this state, the capstan motor 2
1 is not energized, and the cassette 34 is further inserted until the rear end of the large cassette substantially coincides with the exterior member 9. Therefore, according to the manual movement of the cassette 34, the drive sliders 4, 5, the drive gears 16, 17, the reduction gear 1
The capstan motor 21 is rotated via 9a to 19d, the switching gear 24, and the gear 22.

That is, since the capstan motor 21 is equipped with the rotation detection element (FG element) for controlling the rotation speed, the rotation angle of the capstan motor 21 described above can be detected. Therefore, after the cassette insertion detection switch 30 detects the insertion of the cassette 34,
The rotation angle of the capstan motor 21 can be detected and the timing of energizing the capstan motor 21 can be delayed by an amount corresponding to the amount of movement of the cassette holder 10 until the rear end of the large cassette substantially matches the exterior member 9. it can.

After that, the capstan motor 21 is driven to rotate, the switching gear 24, the reduction gear groups 19a to 19d,
The cassette holder 10 is electrically drawn along the guide grooves 2a and 3a through the drive gears 16 and 17 and the drive sliders 4 and 5, and the cassette 34 is positioned at the loading position.

As described above, in the cassette loading apparatus according to the present invention, the cassette size detecting lever 27 and the cassette size detecting switch 29 for detecting the size of the cassette,
A cassette insertion detection lever 30 and a cassette insertion detection switch 32 that detect that a cassette has been inserted, and
In the case of a large cassette, since the capstan motor 21 is provided with a rotation detecting element for detecting a rotation angle,
Regardless of the size of the cassette, it is possible to prevent the cassette from being gripped by hand at the beginning of the pull-in by electrically starting the pull-in from the position where the rear end of the cassette almost coincides with the exterior member. .

As another means for detecting the amount of movement of the cassette holder 10 described above, there is a method shown in FIG.
In this example, the reduction gear group 19 shown in FIG. 1 is connected to a dedicated motor 35, and a rotation detecting reflection label 36 is attached to one gear 19c of the reduction gear group 19 and the reflection label 36 Face-to-face photo reflector 3
7 is provided.

That is, in the manual movement of the cassette holder 10, the reduction gear 19 is rotated via the drive sliders 4 and 5 and the drive gears 16 and 17, and the reflection label 36 is rotated, as in the case shown in FIG. The movement amount of the cassette holder 10 can be detected by detecting the rotation angle of the reflection label 36 with the photo reflector 37.

The electric pulling operation of the cassette holder 10 is performed by the rotation driving of the motor 35 through the reduction gear group 19, the driving gears 16 and 17, and the driving sliders 4 and 5.

Further, as another example, FIGS. 6 and 7 show a case where the position at which the cassette starts to move electrically is detected by using a dedicated switch for each size of the cassette.

3 is different from FIG. 3 in that a detection lever 38 for detecting the position of the cassette holder 10 when the rear end of a large cassette is inserted to a position substantially coincident with the exterior member 9 and a detection switch 39 serving as a third switch. It is provided.

For example, when a small cassette 33 is inserted as shown in FIG. 6, the cassette size detection lever 27 for detecting the size of the cassette does not come into contact with the cassette size detection switch 29. Therefore, the cassette size detection switch 29 does not switch. When the rear end of the cassette reaches the position of the exterior member 9, the cassette insertion detection switch 32 is switched via the cassette insertion detection lever 30, and the cassette motor is rotationally driven from this cassette position to electrically pull in the cassette. Is similar to the case of FIG. 3 described above.

Here, when a large cassette 34 is inserted as shown in FIG. 7, it is determined by the cassette size detection switch 29 that a large cassette has been inserted, so that the insertion of a small cassette is detected. Even if the detection switch 32 is switched, it is ignored and a newly provided detection lever 38 for detecting the insertion of a large cassette 34 is detected.
When the detection switch 39 is switched via the
At this point, the cassette cassette motor is energized to electrically draw in the large cassette 34.

Therefore, also in the above-mentioned example, the position of the rear end of the cassette can be set to a position which substantially coincides with the exterior member 9 regardless of the size of the cassette at the timing when the cassette is electrically pulled in.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

[0047]

As described above, the cassette loading device according to the present invention includes the first detection member for detecting the size of the cassette and the first switch operated by the first detection member. A second detection member or a second switch for detecting that the cassette has been inserted, and a third switch for detecting the position at which the rear end of the cassette has been inserted or a detection means instead of the third switch, for each size of the cassette. When the cassettes having different sizes are inserted, the position of the rear end of the cassette at the time of starting to draw the cassette by the electric means is fixed near the cassette insertion window regardless of the type of the cassette. As a result, it is possible to make it impossible to grasp the cassette to be pulled in by hand. Therefore, it is impossible to pull out by hand against the cassette that is electrically pulled in, and as a result, the possibility of malfunction of the cassette computer mechanism or damage to the mechanism caused by it can be greatly reduced. effective.

Further, since the position of the rear end of the cassette at the time of starting to draw the cassette by the electric means is made constant near the cassette insertion window regardless of the type of the cassette, the cassette of the conventional VHS system or the like can be obtained. The operation feeling is similar to that of the loading device, and the cassette loading device has no discomfort.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette loading device of this example.

FIG. 2 is an exploded perspective view of the cassette loading device of this example.

FIG. 3 is an explanatory diagram of an operation when a small cassette is inserted.

FIG. 4 is an explanatory diagram of an operation when a large cassette is inserted.

FIG. 5 is a perspective view of a cassette loading device including another rotation detection mechanism.

FIG. 6 is an explanatory diagram when a small cassette is inserted by another example of cassette insertion detection means.

FIG. 7 is an explanatory diagram when a large cassette is inserted by the cassette insertion detection means of another example.

FIG. 8 is an explanatory view of detecting a small cassette by a conventional cassette loading device.

FIG. 9 is an explanatory diagram of large cassette detection in a conventional cassette loading device.

[Explanation of symbols]

 1 Mechanical Chassis 2,3 Frame 4,5 Drive Slider 8 Cassette Insertion Window 9 Exterior Member 10 Cassette Holder 13,14 Rack Part 16,17 Drive Gear 19 Reduction Gear 20 Capstan 21 Capstan Motor 22 Gear 24 Switching Gear 26 Switching Arm 27 Cassette size detection lever 29 Cassette size detection switch 30 Cassette insertion detection lever 32 Cassette insertion detection switch 33 Small cassette 34 Large cassette 35 Motor 36 Reflective label 37 Photoreflector 38 Detection lever 39 Detection switch

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akihiro Uetake 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Kazuyoshi Suzuki 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation

Claims (6)

[Claims] 1. A cassette loading device capable of inserting and ejecting two or more types of cassettes having different sizes by an electric means, the first detection member for detecting the type of size of the cassette, and the first detection member. A first switch operated by a member, a second detection member or a second switch for detecting the insertion of a cassette, and a position at which the rear end of the cassette is completely inserted is detected for each cassette size. When a cassette having a different size is inserted, the position of the rear end of the cassette at the time when the cassette is pulled in by the electric means does not depend on the type of the cassette. A cassette loading device characterized in that it is fixed near the cassette insertion window. 2. The cassette loading device according to claim 1, wherein the detection of the size of the cassette detects the width of the cassette. 3. The cassette loading apparatus according to claim 1, wherein the detecting means for detecting the rear end position of the cassette is performed by detecting a rotation angle of a capstan motor. 4. The cassette loading apparatus according to claim 1, wherein the detecting means for detecting the rear end position of the cassette is performed by a rotation detecting means provided on a transmission gear of the electric means for loading the cassette. 5. The cassette loading device according to claim 1, wherein the detection means for detecting the rear end position of the cassette is a switch which is switched by a detection member for detecting the size type of the cassette. 6. The cassette loading according to claim 1, wherein the position of the rear end of the cassette at the time of starting to draw the cassette by the electric means is constant at a position substantially corresponding to the exterior member having the cassette insertion window. apparatus.