JPH0419624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette loading device.

Conventional structure and its problems Traditionally, for example, a VHS system VTR cassette has an opening for tape loading and a guard panel that shields the opening, and the cassette is connected to a magnetic recording/reproducing device through the opening. and insert
When designing a deck in which the cassettes are placed upright, most decks are equipped with a cassette holder like a so-called kangaroo pocket, as shown in FIG. In this case, e.g.
In VHS cassettes, the letters, designs, labels, etc. written on the cassettes were all upside down, which not only made it difficult to see, but also significantly degraded the quality of the product. In addition, in Figure 1, 4
Reference numeral 1 denotes the main body of the magnetic recording/reproducing apparatus, 42 a cassette holder, and the cassette 43, which can be seen through the transparent part in an ejected state, can be taken out freely.
44 is a push button for operation, and 45 is a handle rotatable around a fulcrum 46. The cassette 43 is inserted in the direction of arrow A with the guard panel side facing downward, and then is mounted by manually pushing the cassette holder 42 in the direction of arrow B.

OBJECTS OF THE INVENTION The purpose of the present invention is to overcome the above-mentioned conventional drawbacks, and it is an object of the present invention to allow a cassette to be loaded with the label of the cassette erected.

Structure of the Invention In order to achieve the above object, the cassette loading device of the present invention is movable between a first position where a magnetic recording/reproduction cassette can be taken out and a second position where the cassette is engaged with a reel stand. a cassette holder having a rotated body that is supported by the cassette holder and rotates together with the cassette holder, a slide plate that rotatably supports the cassette holder, and a rotating shaft on the slide plate that transmits rotational force to the rotated body. A rotating body that
A drive shaft protruding from the rotating body, a drive rotating body that moves the slide plate via the rotating body and rotates the rotating body, and guides movement of the drive shaft and substantially linear movement of the slide plate. the drive source includes a motor that rotates in forward and reverse directions; the drive force from the drive source is transmitted through communication between the drive rotary body and the drive shaft; A resistance contact portion that rotates integrally with the guide base is brought into contact with a resistor fixed to the guide base within a predetermined range, thereby applying a moderate load to the drive rotating body within the predetermined range, and applying a moderate load within the predetermined range. The direction of the total rotational load applied to the driving rotary body is not changed.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a cassette deck equipped with a cassette loading device according to an embodiment of the present invention. A cassette deck 1 has a power switch 2 and an eject switch 3 on the right side when viewed from the front, and a cassette 5, which can be seen standing upright, is set in a predetermined position inside a cassette holder 4. A tape counter 6 and operation push buttons 7 are located on the left side of the cassette deck 1 when viewed from the front.

Next, the configuration of the cassette mounting device will be described based on FIG. In the figure, 8 is the chassis, 9
1 is a guide base provided in the cassette deck 1, and 10a to 10d are guide grooves formed in the guy base 9. Guide grooves 10a, 10b, 10
d has a length of approximately 40 mm and is formed horizontally.
The guide groove 10c has a horizontal portion and an arcuate portion extending downward from the tip thereof.The horizontal portion has a length of about 40 mm, and the arcuate portion is formed by an arc centered on the support shaft 23c in the state shown in FIG. 12 is a motor; 13 is a mounting base for fixing the motor 12 to the guide base 9;
2b is a motor pulley that is press-fitted into the rotating shaft 12a of the motor 12, and 14 is a worm that has a press-fitted support shaft 14a, and this support shaft 14a is attached to the mounting base 13.
penetrates through. The left end of the worm 14 is supported by a rotating shaft 12a, connected to a motor pulley 12b, and rotated by the rotation of the motor pulley 12b. 15 is a worm wheel, worm 14
The support shaft 1 is engaged with the guide base 9 and is fixed to the guide base 9.
It is rotatable around 5a. 15b is a spur gear portion that rotates together with the worm wheel 15.
A relay gear 16 has a spur gear part 16a that meshes with the spur gear part 15b and a spur gear part 16b that meshes with another relay gear 17, and is rotatable around a support shaft 16c fixed to the guide base 9. The other relay gear 17 is rotatable around a support shaft 17a fixed to the guide base 9. 18 is a connecting gear, and a connecting shaft 18a passes through the guide base 9.
It rotates together with the relay gear 17 and meshes with the relay gear 17.
Reference numeral 19 denotes a driving gear which meshes with the connecting gear 18 and is rotatable around a support shaft 19a fixed to the guide base 9. A drive lever 20 has a long hole 21 at its tip and rotates together with the drive gear 19 about the support shaft 19a. Reference numeral 22 denotes a main rotating gear, which is rotatable around a support shaft 23c implanted in the slide plate 23, and its effective gear portion is approximately 90 degrees around the support shaft 23c. Reference numeral 22a denotes a drive pin, which is implanted in the main rotating gear 22 and engages with the guide groove 10c and the elongated hole 21 via the roller 22b. 23
Engagement pins a and 23e are implanted in the slide plate 23 and engaged with the guide grooves 10a and 10b via rollers 23b and 23f, respectively. Also, the support shaft 23c
is also engaged with the guide groove 10d via the roller 23d. Therefore, the slide plate 23 is movable only in the horizontal direction within a range of about 35 mm. A holder shaft 23g rotatably supports the cassette holder 4, and is installed at the right end of the slide plate 23. The vertical load applied to this holder shaft 23g is applied to the engagement pins 23a, 23e and the support shaft 23.
3 from c via rollers 23b, 23f, 23d.
It is supported by four guide grooves 10a, 10b, and 10d. 23h is a contact portion 24a of the lever opener 24
This is an abutted part provided to abut against the slide plate 23, and is integral with the slide plate 23. The cassette holder 4 is rotatable within a range of about 105° about the holder shaft 23g. Reference numeral 25 denotes a rotating gear, which is fixed to the cassette holder 4, is rotatable within a range of about 105° about the holder shaft 23g, and meshes with the main rotating gear 22. Reference numeral 26 denotes a cassette lock lever, which is rotatable around a support shaft 26a fixed to the cassette holder 4, has a connecting pin 26b implanted at the rear end, has a spring hook 26c at the top, and has a tip 26d. is cassette 5
prevent it from falling off. The lever opener 24 is also rotatable around the holder shaft 23g,
There is a groove portion 24b at the tip end that engages with the connecting pin 26b, and a contact portion 24a provided at the rear end to come into contact with the abutted portion 23h. 27 is a spring,
Spring hook 4b fixed to cassette holder 4
and the spring hook 26c of the cassette lock lever 26.
It's being put on. Therefore, the cassette lock lever 26 is biased counterclockwise and the lever opener 24 is biased clockwise. 28 is a cassette presser,
It is fixed to the cassette holder 4 and guides the cassette 5 in the vertical direction. Reference numeral 4a denotes a long hole formed in the cassette holder 4, through which a connecting pin 26b passes. Therefore, although the connecting pin 26b is rotatable about the support shaft 26a, its rotation range is limited by the elongated hole 4a. Similarly, the rotation range of lever opener 24 is also limited. 11 is a guard panel located in front of the cassette 5. Reference numeral 29 denotes a cassette support post fixed to the chassis 8, to which the cassette 5 is pressed when the cassette 5 is engaged with the reel stand. A resistance plate spring 30 is fixed to the guide base 9. 3
Reference numeral 1 denotes a resistor contact portion, which is fixed to the drive lever 20 and comes into contact with the resistance plate spring 30 within a predetermined range. Reference numeral 32 denotes a positioning pin, which is fixed to the guide base 9 and connects the resistor contact portion 31 and the resistor leaf spring 3.
0 does not come into contact with the tip of the resistance leaf spring 30.

The drive mechanism for the cassette holder 4 described above is provided on both left and right inner surfaces of the cassette deck 1.
Power is transmitted from the drive mechanism located on one side to the drive mechanism located on the other side via the support shaft 19a.

The operation of the present invention will be explained below. In FIG. 3, the cassette lock lever 26 is in an open state, and the cassette 5 can be inserted into and removed from the cassette holder 4. Now, in Fig. 3, the motor 12
When the motor pulley 12b is rotated, the worm 14 connected thereto also rotates. This causes the worm wheel 15 to rotate clockwise.
This rotational force is applied to the spur gear portion 15b, the relay gears 16, 1
7. It is transmitted to the drive gear 19 via the connection gear 18, and the drive gear 19 rotates counterclockwise. Therefore, the drive lever 20 fixed to the drive gear 19 also rotates counterclockwise about the support shaft 19a. Here, the main rotating gear 22 is connected to the long hole portion 21 and the guide groove 10c via the roller 22b by the drive pin 22a.
Since the rotation of the drive lever 20 causes the main rotary gear 22 to also rotate counterclockwise. As a result, the rotated gear 25 meshing with the main rotating gear 22 rotates clockwise around the holder shaft 23g, which is its rotation center. Therefore, the cassette holder 4, which is integrated with the rotated gear 25, also rotates clockwise. In the state shown in Figure 3, as mentioned earlier, the cassette lock lever 2
6 is open, which means that the contact portion 24a of the lever opener 24 contacts the contact portion 23h fixed to the slide plate 23, and the cassette lock lever 26 is opened via the connecting pin 26b engaged with the groove portion 24b. This is because it prevents it from rotating clockwise. However, when the cassette holder 4 rotates clockwise as described above, the following movement occurs. Fifth
Figure A is in the same state as Figure 3. Approximately from this state
While the 8° cassette holder 4 rotates clockwise, the abutting portion 24a of the lever opener 24 remains in contact with the abutted portion 23h fixed to the slide plate 23, so the lever opener 24 does not rotate. As a result, the connecting pin 26b engaged with the groove 24b of the lever opener 24 is connected to the cassette holder 4.
Rotate approximately 12 degrees clockwise relative to the At this point, the cassette lock lever 26 securely "locks" the cassette 5, and the fifth
It will look like the figure below. FIG. 5C shows a state in which the cassette holder 4 is further rotated clockwise around the holder shaft 23g. The lever opener 24 is biased counterclockwise by the spring 27 via the connecting pin 26b, but since the lower part of the cassette lock lever 26 is in contact with the upper surface of the cassette 5, it is biased relative to the cassette holder 4. It cannot be rotated. That is, in this state, the cassette lock lever 26 and the lever opener 24 are integrated with the cassette holder 4 and the holder shaft 23g
Rotate clockwise around the center. After the above operations, the cassette loading device transitions to the state shown in FIG. In FIG. 6, the cassette holder 4 and the cassette 5 are erected. As mentioned earlier,
Since the arc portion of the guide groove 10c is formed by an arc centered on the support shaft 23c in the state shown in FIG.
During the transition from the state shown in FIG. 3 to the state shown in FIG. 6, the support shaft 23c remains stationary. Therefore, the slide plate 23 on which it is installed also remains stationary. Here, to specifically explain the movements of the main parts that occur during the transition operation from FIG. 3 to FIG.
rotation, the slide plate 23 is stationary, the main rotation gear 22 is rotated counterclockwise by approximately 67 degrees, and the drive gear 19 and drive lever 20 are rotated approximately 57 degrees counterclockwise.
The drive pin 22a and roller 22b are connected to the guide groove 10.
Move to the boundary between the horizontal part and the arc part of c. When the motor 12 further rotates and the drive lever 20 rotates approximately 76° clockwise, the drive pin 22a and roller 22b move approximately horizontally to the left along the guide groove 10c.
Moves 35mm. Now, since the support shaft 23c, which is the center of rotation of the main rotating gear 22, is installed in the slide plate 23, the support shaft 23c, like the slide plate 23, can also be moved only in the horizontal direction as described above. It is. Therefore, the horizontal movement of the drive pin 22a installed in the main rotating gear 22 causes the main rotating gear 22 to move approximately 35 mm horizontally to the left without rotating. Of course,
The slide plate 23 also moves approximately 35 mm horizontally to the left by the horizontally leftward driving force being transmitted through the support shaft 23c. At this time, the holder shaft 23
The cassette holder 4 connected to the slide plate 23 also moves horizontally to the left by about 35 degrees without rotating.
Move mm. Through the above operations, the cassette loading device shifts to the state shown in Figure 7, the cassette 5 is pressed onto the cassette support post 29, the guard panel 5a opens, and the magnetic tape can be pulled out and stored from the cassette opening. It becomes a state. Needless to say, the erect perspective of the cassette 5 is realized in the state shown in FIG. The transition from the state shown in FIG. 7 to the state shown in FIG. 3 is a completely opposite operation to that described above, and can be realized by rotating the motor 12 in the reverse direction.

Next, the operation when the drive pin 22a is near the boundary between the horizontal part and the circular arc part of the guide groove 10c, that is, in the state shown in FIG. 6, will be described. When the cassette 5 is transferred from the state shown in FIG. 7 to the state shown in FIG. 6, the state shown in FIG. 8A is passed through. In the following FIG. 8, the resistance leaf spring 30, the positioning pin 32,
A case where the resistor contact portion 31 is not attached will be described. G is the center of gravity of the entire parts including the cassette holder 4 and cassette 5 whose weight is supported by the holder shaft 23g. In the state shown in Fig. 8A, the cassette holder 4 is rotated clockwise by the rotated gear 25. I am receiving a moment.
This moment causes the drive pin 22a to move toward the guide groove 1.
This is because the main rotary gear 22 receives a counterclockwise moment due to the upward force received from the lower part of 0c, and as a result, a clockwise moment is transmitted to the rotated gear 25. Now, the drive lever 20 when moving from the state A to the state B in Fig. 8.
The rotational force is clockwise, and the load thereon is a load for pushing the cassette holder 4 horizontally to the right, which acts counterclockwise on the drive lever 20. However, when the drive pin 22a moves to the arcuate portion of the guide groove 10c in the state shown in FIG.
The drive pin 22a exerts a clockwise moment on the drive lever 20, since there is no longer a horizontal part of the guide groove 10c which is on the left side of the drive pin 22a and which exerts an upward force on the drive pin 22a. That is, in the state shown in FIG. 8C, a clockwise load is applied to the drive lever 20. By the way, since the driving force of the drive lever 20 is transmitted from the motor 12 through a number of gears, the rotation of the drive lever 20 has a slight play angle with respect to the rotation of the rotation shaft of the motor 12. Therefore, when the cassette holder 4 moves from Fig. 8A to Fig. 8C, the moment it passes the state shown in Fig. 8B, the direction of the load applied to the drive lever 20 changes from counterclockwise to clockwise. The drive lever 20 rapidly rotates clockwise by an angle of . Therefore, the cassette holder 4 instantaneously rotates slightly counterclockwise, and the movement at this time is not smooth. Therefore, by providing a resistance leaf spring 30, a positioning pin 32, and a resistor contact portion 31 as shown in the figure, the following operation can be improved. The state shown in FIG. 8A is the moment when the resistance plate spring 30 and the resistor contact portion 31 are in contact with each other, and when the drive lever 20 further rotates clockwise, the spring force of the resistance plate spring 30 causes the resistance body contact portion 31 to via which the drive lever 20 receives a counterclockwise moment. Similarly, in the states shown in FIG. 8 B and C, the drive lever 20 receives a counterclockwise moment due to the spring force of the resistance leaf spring 30, but this moment is equal to the clockwise moment applied to the drive lever 20 by the center of gravity G. The spring force of the resistance leaf spring 30 is set so as to be larger than the above. Therefore, the drive lever 20 is always subjected to a counterclockwise moment as a load during the transition from A to C in FIG. do. In this embodiment, the plate spring 30 is used as the resistor, but it goes without saying that the same operation can be achieved even if an elastic body such as rubber is used instead as the resistor.

As described above, according to this embodiment, when the cassette 5 is inserted into the cassette holder 4, the cassette 5 is inserted from a position that allows it to be inserted slightly diagonally downward, and when the cassette 5 engages with the reel stand, the cassette 5 is placed in an upright position so that it can be seen through. A mechanism for moving the cassette holder 4 to a desired position can be realized with a small number of parts, and the mechanism is extremely simple, driving only the main rotating gear 22. 4 has excellent positional accuracy in the vertical, horizontal, and horizontal directions. Furthermore, by placing the supporting portion of the cassette holder 4 on the slide plate 23 in a position close to a straight line passing through the center of gravity of the cassette 5 and the cassette holder 4, the load on the drive source when the cassette holder 4 makes a predetermined movement is extremely reduced. becomes smaller. By appropriately selecting the drive locus of the drive pin 22a protruding from the main rotating gear 22, it is possible to cause the cassette holder 4 to perform various movements including rotation and approximately parallel movement. Furthermore, since the direction of the rotational load applied to the drive lever 20 is not changed within a predetermined range,
Within this range, the movement of the cassette holder 4 can be made extremely smooth. Furthermore, by moving the cassette holder 4 as described above, the cassette 5 can be inserted very easily, the cassette 5 can be easily seen after installation, and the quality of the product is greatly improved.
The practical effects are significant.

Effects of the Invention As described above, according to the present invention, there is provided a rotatable body that rotates together with a cassette holder, a slide plate that rotatably supports the cassette holder, and a slide plate that has a rotating shaft that supports the rotated body. By providing a rotating body for transmitting rotational force to the cassette and a resistor, the cassette can be mounted in an upright position, and the cassette holder can move smoothly, which has great practical effects.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing a conventional example, Figs. 2 to 8 show an embodiment of the present invention, Fig. 2 is an external perspective view, and Fig. 3 is a cross section showing the internal mechanism when inserting a cassette. 4 is an exploded perspective view showing the internal mechanism, FIGS. 5A to 5C are cross-sectional side views showing the movement of the cassette lock mechanism, and FIG. 6 shows the cassette holder rotated until it is erected after inserting the cassette. 7 is a cross-sectional side view showing the internal mechanism after the cassette is attached, and FIGS. 8A to 8C are cross-sectional side views showing the internal mechanism before and after the cassette holder starts rotating. 1...Cassette deck, 4...Cassette holder, 5...Cassette, 9...Guide base, 10
a to 10d... Guide groove, 11... Guard panel, 12... Motor, 12a... Rotating shaft, 12b
...Motor pulley, 14...Worm, 15...
Worm wheel, 15b... Spur gear portion, 16...
...Relay gear, 16a, 16b...Spur gear part, 17
... Relay gear, 18 ... Connection gear, 19 ... Drive gear, 20 ... Drive lever, 21 ... Long hole part, 2
2... Main rotating gear, 22a... Drive pin, 23...
...Slide plate, 23a...Engagement pin, 23c...
Support shaft, 23e... Engagement pin, 23g... Holder shaft, 23h... Abutted part, 24... Lever opener, 24a... Abutting part, 25... Rotated gear, 26... Cassette lock lever , 26a...
Support shaft, 27... Spring, 28... Cassette holder, 2
9...Cassette support post, 30...Resistance leaf spring, 31...Resistor contact portion, 32...Positioning pin.

Claims (1)

[Claims] 1 The first part from which the magnetic recording and reproducing cassette can be taken out.
and the second position where the cassette engages with the reel stand.
a cassette holder having a rotated body which is supported so as to be movable between the cassette holder and the cassette holder, which rotates together with the cassette holder, a slide plate which rotatably supports the cassette holder, and a rotating shaft on the slide plate;
a rotating body that transmits rotational force to the rotated body; a drive shaft protruding from the rotating body; a driving rotating body that moves the slide plate via the rotating body and rotates the rotating body; a guide base having a guide portion that guides the movement of the drive shaft and the substantially linear movement of the slide plate; the drive source includes a motor that rotates in forward and reverse directions; the drive force from the drive source is applied to the drive rotating body; is transmitted through the connection of the drive shaft, and the resistance contact part that rotates together with the drive rotor and the resistor fixed to the guide base are brought into contact within a predetermined range, thereby causing the drive rotor to receive the predetermined resistance. A cassette mounting device which applies a moderate load within a range of 200 to 3000, and does not change the direction of the total rotational load applied to the drive rotary body within the predetermined range.