JPH0481275B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing apparatus having a cassette holder that allows the cassette to be seen through the cassette in an upright position.

Conventional structure and its problems Traditionally, for example, a VHS VTR cassette has an opening for loading the tape and a guard panel to shield it, and is inserted into a magnetic recording/reproducing device through the opening. When designing a deck in which the cassette is placed upright using a cassette designed as described above, most of the decks are equipped with a cassette holder such as a so-called kangaroo pocket as shown in FIG. In this case, for example, in the case of a VHS-style cassette as mentioned above, all the letters, designs, labels, etc. written on the cassette were turned upside down, which not only made it difficult to see, but also significantly degraded the quality of the product. In FIG. 1, 1 is the main body of the magnetic recording/reproducing apparatus, 2 is a cassette holder, and the cassette 3, which can be seen through the transparent part in an ejected state, is now free to be taken out. 4 is a push button for operation, and 5 is a handle rotatable around a fulcrum 5a.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a completely erect transparent type cassette holder even when using, for example, a VHS type cassette as described above.

Structure of the Invention In order to achieve the above object, the magnetic recording/reproducing device of the present invention has an opening formed on the front end side for storing a magnetic tape therein and pulling out the magnetic tape, and a device for shielding the opening. A magnetic recording and reproducing device that uses a cassette made to be inserted into the magnetic recording and reproducing device from the guard panel side, and a cassette holder that holds the cassette. A first state in which the bottom surface of the cassette inserted into the cassette holder from the guard panel side is slightly raised from the horizontal state on the rear end of the front side thereof, and a second state in which the bottom surface of the cassette inserted into the cassette holder from the guard panel side is slightly raised above the horizontal state; A plurality of drive levers are provided in conjunction with each other to displace the cassette holder between a second state in which the cassette is rotated and the cassette is approximately vertical, and the guard panel is opened in the second state to record signals on the magnetic tape. A recording and reproducing device for reproducing is provided, and below the cassette holder,
A cassette guide rotatably supported via a cassette guide shaft in a direction along the rotation center of the cassette is provided, and the cassette guide is positioned at a substantially vertical position covering the space below the cassette holder in the first state of the cassette holder. , a regulating member is provided to restrict rotation between the rear end side of the cassette in the second state and a substantially horizontal position supporting the rear end side of the cassette from below, and the cassette holder is rotated from the substantially horizontal position to the substantially vertical position. A biasing spring is provided, and when the cassette holder moves from the first state to the second state, the rear end side of the cassette contacts the cassette guide and rotates the cassette guide to a substantially horizontal position against the spring. It is configured as follows.

DESCRIPTION OF THE EMBODIMENTS The drawings (second
This will be explained based on FIGS.

In Figure 2, the deck 10 has a power switch 13 and an ejector switch 1 on the right side when looking from the front.
4, and a cassette 15, which can be seen standing upright, is set in a predetermined position inside a cassette holder 16. Further, a tape counter 11 and operation push buttons 12 are located on the left side of the deck 10 when viewed from the front. FIG. 3 shows the arrangement of the main parts of the recording/reproducing apparatus as seen from the front. In the state shown in FIG. 3, the magnetic tape 9 is pulled out from the cassette 15, and is transferred from the supply reel 15a via the guide post 37 to the erasing head 17, rotating head cylinder 18, inclined guide post 19, roller guide post 20, and head base. It reaches the audio control head 21, roller guide post 22, and inclined guide post 23 on 21a, passes through a driving capstan 25, a pinch roller 24, passes through guide posts 26 and 28, and is wound onto a take-up reel 15b. The rotary head cylinder 18 is mounted inclined by approximately the lead angle so that the magnetic tape 9 pulled out from the cassette 15 is wound around the rotary head cylinder 18 while remaining approximately horizontal. The guide posts 26 and 28 are connected to the opening 15 of the cassette 15 before the magnetic tape 9 is pulled out from the cassette 15.
c and 15d, respectively. The loading ring 27 is rotatably arranged with an inclination of approximately twice the lead angle in the vicinity where the magnetic tape 9 leaves the rotary head cylinder 18, and is connected to a ring driving means (not shown) such as a DC motor. connected. The magnetic tape 9 coming out of the rotating head cylinder 18 is attached to a fixed inclined guide post 19.
The audio control head 21 is wrapped in a U-turn by the roller guide post 20 on the loading ring 27 with the inclination slightly corrected, and is installed on the head base 21a which is slightly inclined from the installation surface of the cassette 15. come into contact with. Next, the magnetic tape 9 wound around the roller guide post 22 connected to the loading ring 27 by a connecting means (not shown) wraps slightly around the fixed inclined guide post 23, so that it is placed approximately horizontally on the cassette 15. The height, direction, twist, etc. are corrected so that it can be inserted into the loading ring 2.
7 and a pinch roller 24 connected by a connecting means (not shown), a capstan 25 that stands approximately perpendicular to the installation surface of the cassette 15, and further travels through guide posts 26 and 28, and horizontally from the cassette. This magnetic tape 9 is wound horizontally into a cassette 15, forming a tape path.

Next, the loading operation will be described. When the cassette 15 is installed in the predetermined position, the guide posts 26 and 28 are inserted into the opening 15 of the cassette 15.
c, 15d. When a loading instruction is given, the guide post 26 moves along a guide groove (not shown) to a predetermined position on the left side of FIG. reach the position. After that, the loading ring 27 rotates counterclockwise, and first the roller guide post 20 with the tapered tip
enters the loop of the magnetic table mainly formed by the guide post 26 from below, and then the roller guide post 22 and the pinch roller 24 enter the loop. When loading is completed, the roller guide post 20 is fixed on the loading ring 27 as shown in FIG. 3, but the roller guide post 22 is connected to the loading ring 27 by a connecting means (not shown). It is positioned outside the outer periphery of the loading ring 27 by a positioning means (not shown). The pinch roller 24 is provided on a lever (not shown) that is rotatable around a fulcrum pin (not shown) on a loading ring 27, and the lever is pressed by a pressing means (not shown). As a result, the pinch roller 24 and the capstan 25 are pressed together, and this series of operations makes it possible to record and reproduce signals.

Next, the configuration of the cassette mounting device will be described based on FIG. FIG. 4 shows the cassette loading device from the side. In this state, the user must remove cassette 1.
5 can be inserted and removed freely. Reference numeral 29 denotes a guide base to which the cassette loading motor 30 is attached via a mounting base 30a. This guide base 29 is equipped with a gear group including a drive gear 31 rotatable around a support shaft 31a, a drive gear 32 rotatable around a support shaft 32a, and a cam gear 33 rotatable around a support shaft 33a. has been done. In these gear groups, a worm gear 34 attached to the rotating shaft of the cassette loading motor 30 meshes with a worm wheel portion of the drive gear 31, and a spur gear portion of the drive gear 31, a drive gear 32, and a worm wheel portion of the drive gear 31 mesh with each other. It has a configuration in which cam gears 33 are connected. 35 is a drive lever. This drive lever 35 is rotatable around a support shaft 35a, and a drive pin 35b implanted in the drive lever 35 is inserted into a cam groove 33b formed in a cam gear 33 that is rotatable around the support shaft 33a. I'm stuck in it. This cam groove 33b is formed within an effective rotation angle range of about 150 degrees, and in FIG.
5b is inserted, and when the cam gear 33 rotates clockwise, the cam groove 33b remains concentrically around the support shaft 33a for a while, and then moves toward the outer circumference. Drive lever 3
The tip of the drive lever 3 has a long hole 35c.
6 is engaged with the roller 36c at one end. The drive lever 36 is rotatable around a support shaft 36b. In addition to the drive lever 36, a lever (not shown) having substantially the same shape as the drive lever 36 is provided integrally with the drive lever 36 so as to sandwich the cassette holder 16 therebetween. Roller 36c of drive lever 36
are provided so as to protrude from both sides of the drive lever 36, and are engaged with the arcuate grooves 29a of the guide base 29. In FIG. 4, the cassette holder 16 is raised slightly to the right, so that the cassette 15 can be slid in from the holder entrance 16a with a light force. Reference numeral 38 denotes a cassette holding lever provided in the cassette holder 16, which is rotatable about a support shaft 38b and is urged counterclockwise by a tension spring 39 to contact a fixing pin 40. . 38
c is a cylindrical boss portion at one end of the cassette holding lever 38, and a long hole portion 41 at one end of the connecting lever 41.
b. The connecting lever 41 is a support shaft 41a
It can be rotated freely around the center. Connection lever 41
The other end 41c is the shutter 42 in the state shown in FIG.
However, when the cassette loading motor 30 is driven, the cassette 15 comes into contact with the shutter 42 just before it becomes approximately horizontal. The cassette holder 16 is provided with roller support shafts 16b and 16c. In FIG. 4, a cassette stopper (not shown) is provided in the cassette holder 16 to prevent the cassette 15 from entering further inside the cassette holder 16 (to the left in the figure).
The roller support shaft 16c of No. 6 is engaged with the elongated hole 36a of the drive lever 36, and the roller support shaft 16b is connected to the elongated hole of the drive lever 43 that is integral with the drive gear 32 and can rotate around the support shaft 32a. 43a.
The roller support shaft 16b also engages with a guide groove 29b formed in the guide base 29. The roller support shaft 16b passes through a position where it slightly interferes with the drive gear 32 in the middle of the guide groove 29b, but there is no problem since there is a sufficient distance between them in the thickness direction. Reference numeral 29c denotes a guide groove formed on the guide base 29 for guiding the shutter 42. The shutter 42 has a guide groove 29c
It is possible to slide from the left to the bottom right of the drawing along the . The shutter 42 itself will not be described in detail, but it has a blind-like structure that prevents the inside of the device from being seen from the outside in the state shown in FIG. 4. A spring hook 44 is provided at one end of the shutter 42, and a tension spring 45 engaged with the spring hook 44 applies force to the shutter 42 in a substantially clockwise direction along the guide groove 29c. Reference numeral 49 denotes a cassette guide disposed below the cassette holder 16, which is rotatable about a cassette guide shaft 49a in a direction along the rotation center of the cassette holder 16, and is supported by a coil spring 50 (see Fig. 7). 4 and 6, it is biased clockwise. Reference numeral 51 indicates a lower end portion of the front surface of the main body (a part of the regulating member) formed to prevent the cassette guide 49 from coming into contact with the cassette guide 49 biased by the coil spring 50 and protruding toward the front of the main body in a substantially vertical position. example) (see Figure 4). 5
2, when the cassette 15 moves to a predetermined position, and when it is installed in a predetermined position (see Fig. 6),
Cassette guide 49 in contact with cassette 15
This is a stopper pin (an example of a regulating member) that contacts the cassette guide 49 and stops the counterclockwise rotation of the cassette guide 49 from this approximately horizontal position. Furthermore, FIG. 7 shows the relationship in the width direction between the cassette holder 16 and the cassette guide 49, and the dashed line above the cassette holder 16 indicates that when the cassette 15 is inserted into the cassette holder 16, the cassette 15 is moved further back. This is the line of the rear edge of the cassette when the cassette 15 is positioned by a cassette stopper (not shown) provided in the cassette holder 16 to prevent it from entering. Cassette holder 1
This part of the cassette 15, except for the holder entrance 16a which is bent at both ends, is located deeper than the line where the rear end of the cassette 15 is located. This is to facilitate the removal of the cassette 15, and the cassette guide 49, which has a width H2 smaller than the width H1, is inserted into the cassette holder 1.
6, and at this width H2 part, cassette 1
This is due to the purpose of bringing 5 into contact with each other.

Next, the operation of the cassette holder 16 will be described. In FIG. 4, when the cassette loading motor 30 rotates, the worm gear 34 on the motor shaft rotates. As a result, the worm wheel portion of the drive gear 31 connected to the worm gear 34 rotates clockwise about the support shaft 31a. This rotation is transmitted from the spur gear portion of the drive gear 31 to the drive gear 32, and the drive gear 32 rotates counterclockwise around the support shaft 32a. This rotation is controlled by the drive lever 43 integrated with the drive gear 32.
is transmitted to the roller support shaft 16b of the roller support shaft 16b.
b begins to rise along the guide. On the other hand, the rotation of the drive gear 32 is also transmitted to the cam gear 33 which rotates around the support shaft 33a, and the cam gear 33 rotates around the support shaft 33a.
Rotate clockwise around the center. The drive lever 3 has a drive pin 35b in a cam groove 33b formed in the cam gear 33 and is rotatable around a support shaft 35a.
5 rotates clockwise along the cam groove 33b by the rotation of the cam gear 33. This movement is transmitted to the roller 36c on the drive lever 36 through the elongated hole 35c of the drive lever 35, so that the drive lever 36 can rotate counterclockwise about the support shaft 36b. When the cam gear 33 starts to rotate clockwise, the cam groove 33b is concentric with the support shaft 33a for a while, so the movement of the cassette holder 16 is approximately due to the cam groove 29b only, and the front part of the cassette 15 is moved. It moves as if being lifted up. At this time, when the other end 41c of the connecting lever 41 comes into contact with the shutter 42 biased by the tension spring 45 and the cassette holder 16 becomes horizontal, the counterclockwise movement of the connecting lever 41 moves the cassette holding lever 38 from the elongated hole 41b. is transmitted to the boss portion 38C of the cassette holding lever 3.
8 is rotated clockwise by stretching the tension spring 39 around the support shaft 38b, and when the tip 38a comes into contact with the rear side of the cassette 15 and the entire cassette holder 16 begins to rotate clockwise. The cassette 15 is also held in place to prevent it from slipping off the cassette holder 16. As the cassette loading motor 30 continues to rotate,
The connecting lever 41 continues to push up the shutter 42, and the cassette 15 moves from A to B as shown in FIG.
Finally, the state shown in (2) is reached, and the cassette is attached to the reel stand 47 on the chassis 46 and the cassette support post 48, and the cassette loading operation is completed.

FIG. 6 shows the state when cassette loading is completed. The cassette 15 is mounted on the cassette support post 48 on the chassis 46, and the guard panel 15e of the cassette 15 is in an open state to prevent magnetic fields from entering the opening. Tape drawer and storage are possible. In the middle of cassette loading (near the state C in Fig. 5), the connecting lever 41 and the shutter 42 no longer come into contact with each other, but instead come into contact with the case part (not shown) of the cassette holder 16, which prevents the cassette loading. Upon completion of the movement, the shutter 42 is in the state shown in FIG. At the same time, the cassette holding lever 38 is rotated counterclockwise by the tension spring 39 near the state shown in FIG. At this time, the cassette 15 is no longer supported by the cassette holding lever 38, but is supported from below by the cassette guide 49. Although it has already been mentioned that the drive levers 36 are located on both sides of the cassette holder 16, drive gears 31, 32, drive levers 43, etc. are arranged on the other side of the cassette holder 16 to control the rotation of the cassette loading motor 30. communicate,
Needless to say, smoother movement can be achieved by driving the cassette holder 16.

During these cassette loading movements, the cassette guide 49 is moved by the coil spring 5 in FIG.
When viewed from the side where the cassette 15 is inserted (right side in the drawing), the inside of the main body is intentionally hidden from the bottom of the cassette holder 16. There is. When the cassette holder 16 starts moving in the direction to bring the cassette 15 into the state shown in FIG. Start rotating. Cassette 15 is the fifth
In the figure, from position C to position D, the cassette guide 49 contacts the cassette 15 with one end abutting the stopper pin 52, and the cassette 1
This serves as a guide to the predetermined position of No. 5.

Effects of the Invention As described above, according to the present invention, a cassette that has an opening like a VHS cassette and a guard panel for the opening and is designed to be inserted mainly from the guard panel side is used. When inserting the cassette into the cassette holder, insert it slightly diagonally downward with light force, and then move the cassette holder so that you can see through it upright, making it very easy to insert the cassette and making it easy to see the cassette after it has been inserted. , the quality of the product is greatly improved, and the practical effects are great. Furthermore, the cassette guide, which is rotatable on the cassette guide shaft, serves as a guide for the cassette when the cassette is near a predetermined position, and on the other hand, when the cassette holder is largely exposed outside of the main body, it serves as a guide for the cassette. This ensures sufficient external dignity so that the interior cannot be seen from outside.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Figs. 2 to 8 show an embodiment of the present invention, Fig. 2 is an enlarged perspective view seen from the front, and Fig. 3 is a schematic cross section showing the internal mechanism. 4 is a schematic sectional side view showing the internal mechanism, FIG. 5 is a diagram showing the movement trajectory of the cassette when the cassette is installed, FIG. 6 is a schematic sectional side view showing the internal mechanism after the cassette is installed, and FIG. 7 is a schematic sectional side view showing the internal mechanism. is a perspective view showing the relationship between the cassette holder and the cassette guide, and Figure 8 is a perspective view showing the relationship between the cassette holder and the cassette guide.
It is a front view in the state shown in the figure. 9...magnetic tape, 15...cassette, 15
c, 15d...opening, 15e...guard panel, 16...cassette holder, 29...guide base, 29b, 29c...guide groove, 30...
Cassette loading motor, 31... Drive gear, 32... Drive gear, 33... Cam gear, 3
5, 36... Drive lever, 38... Cassette holding lever, 41... Connection lever, 42... Shutter, 43... Drive lever, 49... Cassette guide, 49a... Cassette guide shaft, 50... Coil spring , 51...Lower end of the front surface of the main body, 52...Stopper pin.

Claims (1)

[Claims] 1 It has an opening formed on the front end side for storing a magnetic tape inside and pulling out the magnetic tape, and a guard panel for shielding the opening for shielding this opening. A magnetic recording/reproducing apparatus using a cassette made to be inserted into the magnetic recording/reproducing apparatus from a cassette, which is provided with a cassette holder for holding the cassette, and the bottom surface of the cassette inserted into the cassette holder from the guard panel side is Between the first state in which the rear edge of the front side is slightly raised above the horizontal state, and the second state in which the guard panel side is rotated upward from the first state and the cassette is almost vertical. A plurality of drive levers for displacing the cassette holder are provided in conjunction with each other, and a recording and reproducing device is provided for opening the guard panel in the second state and recording and reproducing signals on the magnetic tape, and below the cassette holder, a recording and reproducing device is provided for recording and reproducing signals on the magnetic tape. A cassette guide rotatably supported via a cassette guide shaft in a direction along the rotation center is provided, and the cassette guide is placed in a substantially vertical position so as to cover the space below the cassette holder in the first state of the cassette holder. and a regulating member that restricts the rotation of the cassette guide so that it is in a substantially horizontal position supporting the rear edge of the cassette from below in the second state of the cassette holder. and a spring for biasing the cassette guide to rotate from a substantially horizontal position to a substantially vertical position. A magnetic recording/reproducing device configured to contact a cassette guide and rotate the cassette guide toward a substantially horizontal position against the spring.